{"gene":"GAL","run_date":"2026-04-28T18:06:52","timeline":{"discoveries":[{"year":1991,"finding":"Human galanin (GAL) exists in two molecular forms: a 30-amino acid non-amidated peptide and a 19-amino acid truncated form, both sharing the N-terminal 15 residues with other mammalian galanins but differing at the C-terminus (human galanin lacks C-terminal amidation unlike porcine/rat galanin). Both forms were isolated from human large intestine and confirmed by amino acid analysis, sequence analysis, and mass spectrometry.","method":"Peptide isolation, amino acid sequencing, mass spectrometry","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 1 — direct protein isolation with multiple orthogonal structural methods, replicated in multiple patients","pmids":["1710578"],"is_preprint":false},{"year":1991,"finding":"Human galanin isolated from pituitary is a 30-residue non-amidated neuropeptide (C-terminal serine free acid), confirmed by Edman degradation and mass spectrometry. Synthetic human galanin retains full biological activity on isolated rat fundus muscle strips, demonstrating functional equivalence of the non-amidated form.","method":"Peptide isolation, Edman degradation, mass spectrometry, bioassay on smooth muscle","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 — direct protein isolation, structural determination by multiple methods, and functional bioassay","pmids":["1722333"],"is_preprint":false},{"year":1986,"finding":"Galanin immunoreactivity is distributed throughout the human and rat gastrointestinal tract, predominantly in the muscle layer, with two distinct molecular forms identified in humans by gel chromatography and HPLC, one of which likely has a C-terminal extension relative to porcine galanin.","method":"Radioimmunoassay, gel chromatography, HPLC with two-antibody characterization","journal":"Gastroenterology","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal biochemical methods in human tissue, single study","pmids":["2427385"],"is_preprint":false},{"year":1986,"finding":"Galanin is present in substantial quantities in human genitourinary tract (highest in vas deferens, corpus cavernosum, vagina, cervix), localizing to nerve fibers within smooth muscle and around blood vessels, suggesting a neurocrine role in regulating smooth muscle tone and blood flow. Two molecular forms were detected in human tissue by gel chromatography.","method":"Radioimmunoassay, immunocytochemistry, gel chromatography","journal":"Peptides","confidence":"Medium","confidence_rationale":"Tier 2-3 — direct localization with biochemical characterization, single study","pmids":["2423990"],"is_preprint":false},{"year":1987,"finding":"Galanin-immunoreactive nerve fibers are present around human eccrine sweat glands, with immunoreactivity localized to large dense-cored vesicles at the ultrastructural level, indicating peptidergic neurosecretion.","method":"Immunocytochemistry (light and electron microscopy)","journal":"The Histochemical journal","confidence":"Medium","confidence_rationale":"Tier 2 — ultrastructural localization to dense-cored vesicles, single study","pmids":["2444569"],"is_preprint":false},{"year":1987,"finding":"Galanin-immunoreactive neurons are present throughout the developing rat and human spinal cord and dorsal root ganglia, appearing earlier in motor than in sensory or autonomic regions, with a pronounced perinatal increase of galanin-immunoreactive fibers in dorsal horn coinciding with DRG cell body expression.","method":"Immunohistochemistry in developmental series (rat and human tissue)","journal":"The Journal of comparative neurology","confidence":"Medium","confidence_rationale":"Tier 2-3 — systematic developmental immunohistochemical mapping, single study","pmids":["2447134"],"is_preprint":false},{"year":1990,"finding":"In the human hypothalamus, galanin-immunoreactive neurons are concentrated in suprachiasmatic, supraoptic, paraventricular, arcuate, and other nuclei. Galanin colocalizes predominantly with arginine vasopressin (AVP) in supraoptic and paraventricular nuclei and to a lesser extent with oxytocin, demonstrated in adjacent paraffin sections.","method":"Immunohistochemistry with two antibodies on human post-mortem brain","journal":"The Journal of comparative neurology","confidence":"Medium","confidence_rationale":"Tier 2 — direct colocalization in human tissue with neuronal counting, single study","pmids":["1698834"],"is_preprint":false},{"year":1994,"finding":"A functional human galanin receptor (GALR1) was cloned from a Bowes melanoma cDNA library. The receptor is a 349-amino acid GPCR with seven transmembrane domains that binds human, porcine, and rat galanin with high affinity (Kd in nanomolar range) and mediates galanin inhibition of adenylate cyclase through pertussis toxin-sensitive Gi/Go proteins.","method":"cDNA expression cloning, radioligand binding assay, adenylate cyclase inhibition assay in COS cells","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 — receptor cloning with functional reconstitution in heterologous cells and pharmacological characterization","pmids":["7524088"],"is_preprint":false},{"year":1995,"finding":"Galanin (GAL) and its co-encoded peptide GMAP (galanin message-associated peptide) expression is dramatically upregulated in rat dorsal root ganglion neurons following sciatic nerve axotomy (50–60% of profiles become immunoreactive). Leukemia inhibitory factor (LIF) is required for this upregulation, as LIF-deficient mice show 65–70% reduction in GAL/GMAP-positive neuron profiles after axotomy.","method":"Immunohistochemistry in LIF-knockout vs. wild-type mice after axotomy","journal":"Experimental brain research","confidence":"High","confidence_rationale":"Tier 2 — genetic loss-of-function (LIF KO) with defined cellular phenotype, replicated across multiple peptide markers","pmids":["8951409"],"is_preprint":false},{"year":1995,"finding":"Following systemic resiniferatoxin (RTX, capsaicin analogue) treatment, galanin mRNA is upregulated ~3-fold in rat dorsal root ganglion neurons (from ~10% to ~30% of neurons positive), with parallel increases in GMAP immunoreactivity, demonstrating that capsaicin-sensitive sensory neuron injury triggers GAL gene transcriptional upregulation ('messenger plasticity').","method":"In situ hybridization and immunohistochemistry in rat DRG","journal":"Neuroreport","confidence":"Medium","confidence_rationale":"Tier 2-3 — parallel mRNA and protein measurements in injury model, single study","pmids":["8595209"],"is_preprint":false},{"year":1998,"finding":"Galanin (GAL) microinjection into the medial preoptic nucleus (MPN) stimulates both male-typical and female-typical sexual behaviors in rats; immunoneutralization of endogenous GAL within the MPN with anti-GAL serum inhibits male-typical sexual behavior. More GAL-immunoreactive cells exist in the MPN of male than female rats, and gonadal steroids (estrogen, testosterone) increase the number and size of GAL-IR cells and their processes within the MPN.","method":"Intracerebral microinjection, immunoneutralization, immunohistochemistry in gonadectomized and hormone-replaced rats","journal":"Annals of the New York Academy of Sciences","confidence":"Medium","confidence_rationale":"Tier 2 — loss-of-function (immunoneutralization) and gain-of-function (microinjection) with defined behavioral phenotype, single study","pmids":["9928171"],"is_preprint":false},{"year":1998,"finding":"Human GALR2 galanin receptor is a 387-amino acid GPCR encoded on chromosome 17q25.3. It couples to both Gαq/11 (stimulating phospholipase C and increasing intracellular calcium) and Gαi/o (inhibiting cAMP accumulation). It binds galanin and N-terminal galanin fragments with high affinity but not C-terminal fragments, and is widely expressed in CNS and peripheral tissues.","method":"Genomic/cDNA cloning, FISH chromosomal mapping, radioligand binding, calcium mobilization assay, cAMP inhibition assay in HEK-293 cells","journal":"Brain research. Molecular brain research","confidence":"High","confidence_rationale":"Tier 1 — receptor cloning with multiple functional assays (dual G-protein coupling demonstrated), structural and pharmacological characterization","pmids":["9685625"],"is_preprint":false},{"year":2002,"finding":"Galanin inhibits acetylcholine release in the central nervous system and modulates growth hormone, prolactin, and luteinizing hormone release; inhibits glucose-induced insulin secretion; and affects gastrointestinal motility. GAL expression is elevated by estrogen, neuronal activation, denervation/nerve injury, and during development. Three receptor subtypes (GALR1, GALR2, GALR3) mediate these effects.","method":"Review synthesizing multiple experimental studies","journal":"Current drug targets. CNS and neurological disorders","confidence":"Medium","confidence_rationale":"Tier 3 — review compiling established experimental findings across multiple studies","pmids":["12769595"],"is_preprint":false},{"year":2014,"finding":"Spexin (SPX) activates galanin receptor subtypes GALR2 and GALR3 (but not GALR1), with higher potency toward GALR3 than galanin itself. Syntenic and phylogenetic analysis shows that spexin, GAL, and kisspeptin genes arose by local duplications before two rounds of whole-genome duplication, and their cognate receptors co-evolved. This was validated by functional assays in human, Xenopus, and zebrafish GALR2/3.","method":"Synteny analysis, phylogenetic reconstruction, ligand-receptor functional assays across species (calcium mobilization/cAMP)","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 1 — functional receptor assays across multiple species combined with evolutionary genomics, demonstrating SPX as alternative GALR2/3 ligand","pmids":["24517231"],"is_preprint":false},{"year":2015,"finding":"In head and neck squamous cell carcinoma, galanin (GAL) secreted by perineural nerves activates GALR2 on cancer cells, triggering NFATC2-mediated transcription of cyclooxygenase-2 (COX-2) and GAL itself. Prostaglandin E2 downstream of COX-2 promotes cancer invasion, and GAL released by cancer cells induces neuritogenesis in a feedback loop that facilitates perineural invasion (PNI). Demonstrated using an in vivo PNI model.","method":"In vivo perineural invasion model, receptor knockdown/overexpression, transcription factor (NFATC2) assays, COX-2/PGE2 pathway analysis","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — novel in vivo model with multiple orthogonal mechanistic experiments (receptor, transcription factor, downstream mediator), single lab but comprehensive","pmids":["25917569"],"is_preprint":false}],"current_model":"Galanin (GAL) is a 30-amino acid (human) non-amidated neuropeptide co-encoded with GMAP in its precursor, widely distributed in CNS, PNS, and endocrine tissues; it signals through three GPCRs (GALR1 coupled to Gi/o-mediated adenylate cyclase inhibition; GALR2/3 coupled to both Gαq/11 and Gαi/o), modulates neurotransmitter release (inhibiting acetylcholine), regulates hormone secretion (growth hormone, insulin, LH) and sexual behavior via the medial preoptic nucleus, and is transcriptionally upregulated in sensory neurons after injury in a LIF-dependent manner; in cancer, nerve-derived GAL activates GALR2 to drive NFATC2-COX-2-PGE2 signaling and perineural invasion, while spexin has been identified as an additional endogenous GALR2/3 ligand."},"narrative":{"teleology":[{"year":1986,"claim":"Mapping GAL peptide distribution in human peripheral tissues established that galanin is not solely a CNS neuropeptide but is broadly expressed in gastrointestinal and genitourinary nerve fibers, implying roles in smooth muscle regulation and neurocrine signaling.","evidence":"Radioimmunoassay, immunocytochemistry, and gel chromatography in human GI and genitourinary tissues identifying two molecular forms and nerve-fiber localization","pmids":["2427385","2423990"],"confidence":"Medium","gaps":["Functional consequences of galanin on peripheral smooth muscle in human tissues were not tested","Identity of the two molecular forms was not resolved at the sequence level"]},{"year":1987,"claim":"Developmental and ultrastructural studies showed GAL is packaged in large dense-cored vesicles for regulated secretion and is expressed in defined developmental windows in spinal cord and DRG, establishing it as a regulated neuropeptide with potential developmental roles.","evidence":"Immunohistochemistry at light and electron microscopy levels in rat/human developing spinal cord, DRG, and human sweat glands","pmids":["2444569","2447134"],"confidence":"Medium","gaps":["Functional role of galanin in spinal cord development was not tested","Secretion dynamics were not measured"]},{"year":1990,"claim":"Colocalization of GAL with vasopressin in human hypothalamic magnocellular neurons suggested a neuromodulatory role in neuroendocrine circuits controlling fluid balance and hormone release.","evidence":"Dual immunohistochemistry on human post-mortem hypothalamus with cell counting across nuclei","pmids":["1698834"],"confidence":"Medium","gaps":["Functional interaction between galanin and AVP release was not demonstrated","Single study on post-mortem tissue"]},{"year":1991,"claim":"Isolation and complete sequencing of human GAL from intestine and pituitary resolved a longstanding species discrepancy: human galanin is a 30-residue non-amidated peptide (unlike amidated porcine/rat forms) that retains full biological activity.","evidence":"Peptide purification, Edman degradation, mass spectrometry from human gut and pituitary; synthetic peptide bioassay on rat fundus","pmids":["1710578","1722333"],"confidence":"High","gaps":["Whether the 19-residue truncated form has distinct biological activity was not resolved","Receptor-binding affinity differences between amidated and non-amidated forms were not quantified"]},{"year":1994,"claim":"Cloning of GALR1 identified the first high-affinity galanin receptor as a Gi/Go-coupled GPCR that mediates adenylate cyclase inhibition, providing the molecular basis for galanin's inhibitory neuromodulatory actions.","evidence":"Expression cloning from Bowes melanoma cDNA, radioligand binding, and pertussis toxin-sensitive cAMP inhibition in COS cells","pmids":["7524088"],"confidence":"High","gaps":["Physiological functions assignable specifically to GALR1 versus other receptor subtypes were unknown","Endogenous coupling partners in neurons were not identified"]},{"year":1995,"claim":"Peripheral nerve injury triggers dramatic upregulation of GAL in DRG sensory neurons, and this response requires LIF signaling, establishing an injury-responsive transcriptional program for galanin.","evidence":"Immunohistochemistry and in situ hybridization in LIF-knockout versus wild-type mice after sciatic nerve axotomy; resiniferatoxin injury model in rat DRG","pmids":["8951409","8595209"],"confidence":"High","gaps":["Downstream transcription factors mediating LIF-dependent GAL induction were not identified","Functional consequence of GAL upregulation for nerve regeneration was not directly tested"]},{"year":1998,"claim":"Cloning of GALR2 revealed a second receptor with dual Gαq/11 and Gαi/o coupling, explaining galanin's ability to both stimulate PLC/calcium signaling and inhibit cAMP, while behavioral studies established GAL as a steroid-regulated mediator of sexual behavior in the medial preoptic nucleus.","evidence":"GALR2 cloning with calcium mobilization and cAMP assays in HEK-293 cells; intracerebral GAL microinjection and immunoneutralization in gonadectomized rats","pmids":["9685625","9928171"],"confidence":"High","gaps":["Relative contributions of GALR1 versus GALR2 in MPN sexual behavior circuits were not dissected","GALR3 functional characterization was still incomplete"]},{"year":2014,"claim":"Identification of spexin as an endogenous GALR2/3 ligand with higher GALR3 potency than galanin itself redefined the receptor system as multi-ligand and revealed that GAL, spexin, and kisspeptin gene families co-evolved from ancestral duplications.","evidence":"Cross-species calcium mobilization and cAMP assays (human, Xenopus, zebrafish GALR2/3) combined with synteny and phylogenetic reconstruction","pmids":["24517231"],"confidence":"High","gaps":["Physiological contexts in which spexin versus GAL preferentially activates GALR2/3 remain undefined","Structural basis for spexin selectivity over GALR1 was not determined"]},{"year":2015,"claim":"A cancer-relevant signaling circuit was delineated in which nerve-derived GAL activates GALR2 on tumor cells to engage NFATC2–COX-2–PGE2 signaling, promoting perineural invasion and a neuritogenic feedback loop—the first defined oncogenic pathway for galanin.","evidence":"In vivo perineural invasion model in head and neck squamous cell carcinoma with GALR2 knockdown/overexpression, NFATC2 reporter assays, and COX-2/PGE2 pathway inhibition","pmids":["25917569"],"confidence":"High","gaps":["Generalizability to other cancer types with perineural invasion was not established","Whether GALR1 or GALR3 counteracts or cooperates with GALR2 in this context is unknown"]},{"year":null,"claim":"Major unresolved questions include the specific physiological functions of GAL upregulation during nerve regeneration, the structural determinants of ligand selectivity across GALR1–3, and whether the GAL–GALR2 oncogenic axis operates beyond head and neck cancer.","evidence":"","pmids":[],"confidence":"Low","gaps":["No direct nerve regeneration phenotype demonstrated in GAL-knockout animals","No crystal/cryo-EM structure of any GALR–ligand complex","GALR3-specific physiological roles remain largely uncharacterized"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[0,1,7,11,14]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[2,3,4,14]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[4]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[7,11,14]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[6,8,10,12]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[14]}],"complexes":[],"partners":["GALR1","GALR2","GALR3","NFATC2","AVP"],"other_free_text":[]},"mechanistic_narrative":"Galanin (GAL) is a neuropeptide that functions as a widespread neuromodulator and endocrine regulator, controlling neurotransmitter release, hormone secretion, smooth muscle tone, and sexual behavior through three G protein-coupled receptors (GALR1–3). Human GAL is a 30-amino acid non-amidated peptide processed from a precursor that also yields GMAP; it signals via GALR1-coupled Gi/o inhibition of adenylate cyclase and GALR2-coupled Gαq/11 activation of phospholipase C, while spexin serves as an additional endogenous GALR2/3 ligand [PMID:7524088, PMID:9685625, PMID:24517231]. GAL expression is transcriptionally upregulated in sensory neurons after peripheral nerve injury in a leukemia inhibitory factor (LIF)-dependent manner, and within the medial preoptic nucleus GAL mediates gonadal steroid-regulated sexual behavior [PMID:8951409, PMID:9928171]. In head and neck squamous cell carcinoma, nerve-derived GAL activates GALR2 on cancer cells to drive an NFATC2–COX-2–PGE2 signaling cascade that promotes perineural invasion and a neuritogenic feedback loop [PMID:25917569]."},"prefetch_data":{"uniprot":{"accession":"P22466","full_name":"Galanin peptides","aliases":[],"length_aa":123,"mass_kda":13.3,"function":"Endocrine hormone of the central and peripheral nervous systems that binds and activates the G protein-coupled receptors GALR1, GALR2, and GALR3. This small neuropeptide may regulate diverse physiologic functions including contraction of smooth muscle of the gastrointestinal and genitourinary tract, growth hormone and insulin release and adrenal secretion","subcellular_location":"Secreted","url":"https://www.uniprot.org/uniprotkb/P22466/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/GAL","classification":"Not Classified","n_dependent_lines":18,"n_total_lines":1208,"dependency_fraction":0.014900662251655629},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/GAL","total_profiled":1310},"omim":[{"mim_id":"620776","title":"THROMBOCYTOPENIA 13, SYNDROMIC; THC13","url":"https://www.omim.org/entry/620776"},{"mim_id":"619624","title":"LEMUR TYROSINE KINASE 3; LMTK3","url":"https://www.omim.org/entry/619624"},{"mim_id":"619600","title":"AMINOPEPTIDASE O; AOPEP","url":"https://www.omim.org/entry/619600"},{"mim_id":"619287","title":"COILED-COIL DOMAIN-CONTAINING PROTEIN 66; CCDC66","url":"https://www.omim.org/entry/619287"},{"mim_id":"619246","title":"SPEXIN HORMONE; SPX","url":"https://www.omim.org/entry/619246"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Golgi apparatus","reliability":"Approved"},{"location":"Vesicles","reliability":"Additional"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"pituitary gland","ntpm":957.4}],"url":"https://www.proteinatlas.org/search/GAL"},"hgnc":{"alias_symbol":["GMAP","GAL-GMAP","GLNN"],"prev_symbol":["GALN"]},"alphafold":{"accession":"P22466","domains":[{"cath_id":"-","chopping":"3-111","consensus_level":"medium","plddt":64.2846,"start":3,"end":111}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P22466","model_url":"https://alphafold.ebi.ac.uk/files/AF-P22466-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P22466-F1-predicted_aligned_error_v6.png","plddt_mean":66.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=GAL","jax_strain_url":"https://www.jax.org/strain/search?query=GAL"},"sequence":{"accession":"P22466","fasta_url":"https://rest.uniprot.org/uniprotkb/P22466.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P22466/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P22466"}},"corpus_meta":[{"pmid":"15728110","id":"PMC_15728110","title":"GMAP: a genomic mapping and alignment program for mRNA and EST sequences.","date":"2005","source":"Bioinformatics (Oxford, England)","url":"https://pubmed.ncbi.nlm.nih.gov/15728110","citation_count":1679,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"27512904","id":"PMC_27512904","title":"Fap2 Mediates Fusobacterium nucleatum Colorectal Adenocarcinoma Enrichment by Binding to Tumor-Expressed Gal-GalNAc.","date":"2016","source":"Cell host & microbe","url":"https://pubmed.ncbi.nlm.nih.gov/27512904","citation_count":656,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7504304","id":"PMC_7504304","title":"Anti-pig IgM antibodies in human serum react predominantly with Gal(alpha 1-3)Gal epitopes.","date":"1993","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/7504304","citation_count":516,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"2434954","id":"PMC_2434954","title":"Evolutionary relationship between the natural anti-Gal antibody and the Gal alpha 1----3Gal epitope in primates.","date":"1987","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/2434954","citation_count":513,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7601342","id":"PMC_7601342","title":"Transcriptional regulation in the yeast GAL gene family: a complex genetic network.","date":"1995","source":"FASEB journal : official publication of the Federation of American Societies for Experimental Biology","url":"https://pubmed.ncbi.nlm.nih.gov/7601342","citation_count":326,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"27008021","id":"PMC_27008021","title":"GMAP and GSNAP for Genomic Sequence Alignment: Enhancements to Speed, Accuracy, and Functionality.","date":"2016","source":"Methods in molecular biology (Clifton, N.J.)","url":"https://pubmed.ncbi.nlm.nih.gov/27008021","citation_count":309,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"25747720","id":"PMC_25747720","title":"The alpha-gal story: lessons learned from connecting the dots.","date":"2015","source":"The Journal of allergy and clinical immunology","url":"https://pubmed.ncbi.nlm.nih.gov/25747720","citation_count":255,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7532618","id":"PMC_7532618","title":"Gal alpha (1,3)Gal, the major xenoantigen(s) recognised in pigs by human natural antibodies.","date":"1994","source":"Immunological reviews","url":"https://pubmed.ncbi.nlm.nih.gov/7532618","citation_count":253,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"2434599","id":"PMC_2434599","title":"The human natural anti-Gal IgG. III. The subtlety of immune tolerance in man as demonstrated by crossreactivity between natural anti-Gal and anti-B antibodies.","date":"1987","source":"The Journal of experimental medicine","url":"https://pubmed.ncbi.nlm.nih.gov/2434599","citation_count":205,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15294158","id":"PMC_15294158","title":"GMAP-210 recruits gamma-tubulin complexes to cis-Golgi membranes and is required for Golgi ribbon formation.","date":"2004","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/15294158","citation_count":182,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"23578170","id":"PMC_23578170","title":"Anti-Gal: an abundant human natural antibody of multiple pathogeneses and clinical benefits.","date":"2013","source":"Immunology","url":"https://pubmed.ncbi.nlm.nih.gov/23578170","citation_count":181,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"10189370","id":"PMC_10189370","title":"GMAP-210, A cis-Golgi network-associated protein, is a minus end microtubule-binding protein.","date":"1999","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/10189370","citation_count":146,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15381776","id":"PMC_15381776","title":"Parallel inactivation of multiple GAL pathway genes and ecological diversification in yeasts.","date":"2004","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/15381776","citation_count":145,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"8951409","id":"PMC_8951409","title":"Influence of leukemia inhibitory factor on galanin/GMAP and neuropeptide Y expression in mouse primary sensory neurons after axotomy.","date":"1996","source":"Experimental brain research","url":"https://pubmed.ncbi.nlm.nih.gov/8951409","citation_count":126,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"10675356","id":"PMC_10675356","title":"Differential immune responses to alpha-gal epitopes on xenografts and allografts: implications for accommodation in xenotransplantation.","date":"2000","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/10675356","citation_count":121,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"20089971","id":"PMC_20089971","title":"Lethal skeletal dysplasia in mice and humans lacking the golgin GMAP-210.","date":"2010","source":"The New England journal of medicine","url":"https://pubmed.ncbi.nlm.nih.gov/20089971","citation_count":113,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"18358727","id":"PMC_18358727","title":"Trivalent, Gal/GalNAc-containing ligands designed for the asialoglycoprotein receptor.","date":"2008","source":"Bioorganic & medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/18358727","citation_count":109,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9583877","id":"PMC_9583877","title":"A sensitive assay for measuring alpha-Gal epitope expression on cells by a monoclonal anti-Gal antibody.","date":"1998","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/9583877","citation_count":104,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"31214181","id":"PMC_31214181","title":"Environmental and Molecular Drivers of the α-Gal Syndrome.","date":"2019","source":"Frontiers in immunology","url":"https://pubmed.ncbi.nlm.nih.gov/31214181","citation_count":95,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7524207","id":"PMC_7524207","title":"Gal alpha(1,3)Gal is the major xenoepitope expressed on pig endothelial cells recognized by naturally occurring cytotoxic human antibodies.","date":"1994","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/7524207","citation_count":93,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"2744457","id":"PMC_2744457","title":"DNA bending by negative regulatory proteins: Gal and Lac repressors.","date":"1989","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/2744457","citation_count":92,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"2435715","id":"PMC_2435715","title":"Identification of erythrocyte Gal alpha 1-3Gal glycosphingolipids with a mouse monoclonal antibody, Gal-13.","date":"1987","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/2435715","citation_count":86,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"16144463","id":"PMC_16144463","title":"Presence and elimination of the xenoantigen gal (alpha1, 3) gal in tissue-engineered heart valves.","date":"2005","source":"Tissue engineering","url":"https://pubmed.ncbi.nlm.nih.gov/16144463","citation_count":76,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"6715281","id":"PMC_6715281","title":"Sequence of the Saccharomyces GAL region and its transcription in vivo.","date":"1984","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/6715281","citation_count":74,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"21219457","id":"PMC_21219457","title":"Unravelling the gallic acid degradation pathway in bacteria: the gal cluster from Pseudomonas putida.","date":"2010","source":"Molecular microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/21219457","citation_count":73,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"11323719","id":"PMC_11323719","title":"Gal repressosome contains an antiparallel DNA loop.","date":"2001","source":"Nature structural biology","url":"https://pubmed.ncbi.nlm.nih.gov/11323719","citation_count":73,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9098067","id":"PMC_9098067","title":"Transcription of glutamine synthetase genes (glnA and glnN) from the cyanobacterium Synechocystis sp. strain PCC 6803 is differently regulated in response to nitrogen availability.","date":"1997","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/9098067","citation_count":72,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"39018876","id":"PMC_39018876","title":"Graveoline attenuates D-GalN/LPS-induced acute liver injury via inhibition of JAK1/STAT3 signaling pathway.","date":"2024","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/39018876","citation_count":63,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"26531137","id":"PMC_26531137","title":"Characteristics of α-Gal epitope, anti-Gal antibody, α1,3 galactosyltransferase and its clinical exploitation (Review).","date":"2015","source":"International journal of molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/26531137","citation_count":63,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"18001501","id":"PMC_18001501","title":"N-GAL: diagnosing AKI as soon as possible.","date":"2007","source":"Critical care (London, England)","url":"https://pubmed.ncbi.nlm.nih.gov/18001501","citation_count":60,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"10450874","id":"PMC_10450874","title":"Expression of the galanin receptor subtype Gal-R2 mRNA in the rat hypothalamus.","date":"1999","source":"Journal of chemical neuroanatomy","url":"https://pubmed.ncbi.nlm.nih.gov/10450874","citation_count":59,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"28282576","id":"PMC_28282576","title":"Antioxidation, anti-inflammation and anti-apoptosis by paeonol in LPS/d-GalN-induced acute liver failure in mice.","date":"2017","source":"International immunopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/28282576","citation_count":59,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"8557707","id":"PMC_8557707","title":"Genomic organization and chromosomal mapping of the Gal beta 1,3GalNAc/Gal beta 1,4GlcNAc alpha 2,3-sialyltransferase.","date":"1996","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/8557707","citation_count":59,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7906687","id":"PMC_7906687","title":"A new type of glutamine synthetase in cyanobacteria: the protein encoded by the glnN gene supports nitrogen assimilation in Synechocystis sp. strain PCC 6803.","date":"1994","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/7906687","citation_count":53,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"22639266","id":"PMC_22639266","title":"Detection of β-galactosidase activity: X-gal staining.","date":"2012","source":"Methods in molecular biology (Clifton, N.J.)","url":"https://pubmed.ncbi.nlm.nih.gov/22639266","citation_count":52,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"17934810","id":"PMC_17934810","title":"A role of cell apoptosis in lipopolysaccharide (LPS)-induced nonlethal liver injury in D-galactosamine (D-GalN)-sensitized rats.","date":"2007","source":"Digestive diseases and sciences","url":"https://pubmed.ncbi.nlm.nih.gov/17934810","citation_count":51,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"12383348","id":"PMC_12383348","title":"The overexpression of GMAP-210 blocks anterograde and retrograde transport between the ER and the Golgi apparatus.","date":"2002","source":"Traffic (Copenhagen, Denmark)","url":"https://pubmed.ncbi.nlm.nih.gov/12383348","citation_count":49,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"22360754","id":"PMC_22360754","title":"The effect of Gal expression on pig cells on the human T-cell xenoresponse.","date":"2012","source":"Xenotransplantation","url":"https://pubmed.ncbi.nlm.nih.gov/22360754","citation_count":49,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"31053502","id":"PMC_31053502","title":"Alpha-Gal-containing biologics and anaphylaxis.","date":"2019","source":"Allergology international : official journal of the Japanese Society of Allergology","url":"https://pubmed.ncbi.nlm.nih.gov/31053502","citation_count":48,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"31553177","id":"PMC_31553177","title":"Exopolysaccharides from Lactobacillus buchneri TCP016 Attenuate LPS- and d-GalN-Induced Liver Injury by Modulating the Gut Microbiota.","date":"2019","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/31553177","citation_count":48,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"35386980","id":"PMC_35386980","title":"The α-Gal Syndrome and Potential Mechanisms.","date":"2021","source":"Frontiers in allergy","url":"https://pubmed.ncbi.nlm.nih.gov/35386980","citation_count":47,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15695361","id":"PMC_15695361","title":"Gal80 dimerization and the yeast GAL gene switch.","date":"2005","source":"Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/15695361","citation_count":47,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"36134173","id":"PMC_36134173","title":"The Meat of the Matter: Understanding and Managing Alpha-Gal Syndrome.","date":"2022","source":"ImmunoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/36134173","citation_count":46,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"17667817","id":"PMC_17667817","title":"Characterization of natural human anti-non-gal antibodies and their effect on activation of porcine gal-deficient endothelial cells.","date":"2007","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/17667817","citation_count":46,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"18772342","id":"PMC_18772342","title":"Differential roles of JNK in ConA/GalN and ConA-induced liver injury in mice.","date":"2008","source":"The American journal of pathology","url":"https://pubmed.ncbi.nlm.nih.gov/18772342","citation_count":44,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"25717001","id":"PMC_25717001","title":"The golgin GMAP-210 is required for efficient membrane trafficking in the early secretory pathway.","date":"2015","source":"Journal of cell science","url":"https://pubmed.ncbi.nlm.nih.gov/25717001","citation_count":42,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"11144962","id":"PMC_11144962","title":"The X-gal caution in neural transplantation studies.","date":"2000","source":"Cell transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/11144962","citation_count":42,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"24531650","id":"PMC_24531650","title":"Oxidative stress promotes D-GalN/LPS-induced acute hepatotoxicity by increasing glycogen synthase kinase 3β activity.","date":"2014","source":"Inflammation research : official journal of the European Histamine Research Society ... [et al.]","url":"https://pubmed.ncbi.nlm.nih.gov/24531650","citation_count":39,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"34034363","id":"PMC_34034363","title":"Tick salivary gland extract induces alpha-gal syndrome in alpha-gal deficient mice.","date":"2021","source":"Immunity, inflammation and disease","url":"https://pubmed.ncbi.nlm.nih.gov/34034363","citation_count":39,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9275118","id":"PMC_9275118","title":"Down-regulation of Gal alpha(1,3)Gal expression by alpha1,2-fucosyltransferase: further characterization of alpha1,2-fucosyltransferase transgenic mice.","date":"1997","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/9275118","citation_count":39,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"22146315","id":"PMC_22146315","title":"Induced anti-non gal antibodies in human xenograft recipients.","date":"2012","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/22146315","citation_count":38,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"29301066","id":"PMC_29301066","title":"An Expanded Heterologous GAL Promoter Collection for Diauxie-Inducible Expression in Saccharomyces cerevisiae.","date":"2018","source":"ACS synthetic biology","url":"https://pubmed.ncbi.nlm.nih.gov/29301066","citation_count":37,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"35729734","id":"PMC_35729734","title":"Orientin Attenuated d-GalN/LPS-Induced Liver Injury through the Inhibition of Oxidative Stress via Nrf2/Keap1 Pathway.","date":"2022","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/35729734","citation_count":36,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9076511","id":"PMC_9076511","title":"A novel glycosphingolipid expressed in pig kidney: Gal alpha 1-3Lewis(x) hexaglycosylceramide.","date":"1997","source":"Glycoconjugate journal","url":"https://pubmed.ncbi.nlm.nih.gov/9076511","citation_count":36,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15289461","id":"PMC_15289461","title":"DNA trajectory in the Gal repressosome.","date":"2004","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/15289461","citation_count":36,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"8595209","id":"PMC_8595209","title":"Increased levels of GMAP, VIP and nitric oxide synthase, and their mRNAs, in lumbar dorsal root ganglia of the rat following systemic resiniferatoxin treatment.","date":"1995","source":"Neuroreport","url":"https://pubmed.ncbi.nlm.nih.gov/8595209","citation_count":36,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"17452322","id":"PMC_17452322","title":"Induction of the gal pathway and cellulase genes involves no transcriptional inducer function of the galactokinase in Hypocrea jecorina.","date":"2007","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/17452322","citation_count":36,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"30134043","id":"PMC_30134043","title":"Deletion of caveolin-1 attenuates LPS/GalN-induced acute liver injury in mice.","date":"2018","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/30134043","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9325090","id":"PMC_9325090","title":"Repression and activation of promoter-bound RNA polymerase activity by Gal repressor.","date":"1997","source":"Journal of molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/9325090","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"10986271","id":"PMC_10986271","title":"The Synechococcus strain PCC 7942 glnN product (glutamine synthetase III) helps recovery from prolonged nitrogen chlorosis.","date":"2000","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/10986271","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"25400741","id":"PMC_25400741","title":"Pretreatment of lipopolysaccharide (LPS) ameliorates D-GalN/LPS induced acute liver failure through TLR4 signaling pathway.","date":"2014","source":"International journal of clinical and experimental pathology","url":"https://pubmed.ncbi.nlm.nih.gov/25400741","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"14596799","id":"PMC_14596799","title":"\"Antiparallel\" DNA loop in gal repressosome visualized by atomic force microscopy.","date":"2003","source":"Journal of molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/14596799","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"30173053","id":"PMC_30173053","title":"Piceatannol attenuates D-GalN/LPS-induced hepatoxicity in mice: Involvement of ER stress, inflammation and oxidative stress.","date":"2018","source":"International immunopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/30173053","citation_count":34,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32948455","id":"PMC_32948455","title":"α-Gal-Based Vaccines: Advances, Opportunities, and Perspectives.","date":"2020","source":"Trends in parasitology","url":"https://pubmed.ncbi.nlm.nih.gov/32948455","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"33986260","id":"PMC_33986260","title":"Prevention of D-GalN/LPS-induced ALI by 18β-glycyrrhetinic acid through PXR-mediated inhibition of autophagy degradation.","date":"2021","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/33986260","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"4942917","id":"PMC_4942917","title":"Isolation of the gal repressor.","date":"1971","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/4942917","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"26211586","id":"PMC_26211586","title":"Cerium oxide nanoparticles alleviate oxidative stress and decreases Nrf-2/HO-1 in D-GALN/LPS induced hepatotoxicity.","date":"2015","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/26211586","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7950407","id":"PMC_7950407","title":"Epitope mapping of region 11-70 of ovalbumin (Gal d I) using five synthetic peptides.","date":"1994","source":"International archives of allergy and immunology","url":"https://pubmed.ncbi.nlm.nih.gov/7950407","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"6268612","id":"PMC_6268612","title":"Escherichia coli gal operon proteins made after prophage lambda induction.","date":"1981","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/6268612","citation_count":33,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32344637","id":"PMC_32344637","title":"Vaccination with Alpha-Gal Protects Against Mycobacterial Infection in the Zebrafish Model of Tuberculosis.","date":"2020","source":"Vaccines","url":"https://pubmed.ncbi.nlm.nih.gov/32344637","citation_count":32,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"11792992","id":"PMC_11792992","title":"Depletion of anti-gal antibodies in baboons by intravenous therapy with bovine serum albumin conjugated to gal oligosaccharides.","date":"2002","source":"Transplantation","url":"https://pubmed.ncbi.nlm.nih.gov/11792992","citation_count":31,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"33009122","id":"PMC_33009122","title":"'Doc, will I ever eat steak again?': diagnosis and management of alpha-gal syndrome.","date":"2020","source":"Current opinion in pediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/33009122","citation_count":31,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"22065336","id":"PMC_22065336","title":"Triptolide attenuate the oxidative stress induced by LPS/D-GalN in mice.","date":"2012","source":"Journal of cellular biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/22065336","citation_count":31,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"22069473","id":"PMC_22069473","title":"Complement and the alternative pathway play an important role in LPS/D-GalN-induced fulminant hepatic failure.","date":"2011","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/22069473","citation_count":29,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"35836757","id":"PMC_35836757","title":"Ginsenoside Rb1 Reduces D-GalN/LPS-induced Acute Liver Injury by Regulating TLR4/NF-κB Signaling and NLRP3 Inflammasome.","date":"2021","source":"Journal of clinical and translational hepatology","url":"https://pubmed.ncbi.nlm.nih.gov/35836757","citation_count":29,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32267656","id":"PMC_32267656","title":"LAG-3 and GAL-3 in Endometrial Carcinoma: Emerging Candidates for Immunotherapy.","date":"2020","source":"International journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists","url":"https://pubmed.ncbi.nlm.nih.gov/32267656","citation_count":29,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"31795213","id":"PMC_31795213","title":"FOXD1 and Gal-3 Form a Positive Regulatory Loop to Regulate Lung Cancer Aggressiveness.","date":"2019","source":"Cancers","url":"https://pubmed.ncbi.nlm.nih.gov/31795213","citation_count":29,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"27420055","id":"PMC_27420055","title":"BML-111 Protected LPS/D-GalN-Induced Acute Liver Injury in Rats.","date":"2016","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/27420055","citation_count":28,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32027409","id":"PMC_32027409","title":"Topical α-gal nanoparticles accelerate diabetic wound healing.","date":"2020","source":"Experimental dermatology","url":"https://pubmed.ncbi.nlm.nih.gov/32027409","citation_count":27,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"34926322","id":"PMC_34926322","title":"Alpha-Gal Syndrome: Involvement of Amblyomma americanum α-D-Galactosidase and β-1,4 Galactosyltransferase Enzymes in α-Gal Metabolism.","date":"2021","source":"Frontiers in cellular and infection microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/34926322","citation_count":27,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"26352381","id":"PMC_26352381","title":"Identification and Characterization of GAL-021 as a Novel Breathing Control Modulator.","date":"2015","source":"Anesthesiology","url":"https://pubmed.ncbi.nlm.nih.gov/26352381","citation_count":27,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"31792144","id":"PMC_31792144","title":"Screening Bacterial Colonies Using X-Gal and IPTG: α-Complementation.","date":"2019","source":"Cold Spring Harbor protocols","url":"https://pubmed.ncbi.nlm.nih.gov/31792144","citation_count":26,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"2580037","id":"PMC_2580037","title":"Gal-Gal pyelonephritis Escherichia coli pili linear immunogenic and antigenic epitopes.","date":"1985","source":"The Journal of experimental medicine","url":"https://pubmed.ncbi.nlm.nih.gov/2580037","citation_count":26,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15053316","id":"PMC_15053316","title":"Sugar utilisation and conservation of the gal-lac gene cluster in Streptococcus thermophilus.","date":"2004","source":"Systematic and applied microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/15053316","citation_count":26,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"21966486","id":"PMC_21966486","title":"A test of the coordinated expression hypothesis for the origin and maintenance of the GAL cluster in yeast.","date":"2011","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/21966486","citation_count":25,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"18671678","id":"PMC_18671678","title":"The anti-non-gal xenoantibody response to xenoantigens on gal knockout pig cells is encoded by a restricted number of germline progenitors.","date":"2008","source":"American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons","url":"https://pubmed.ncbi.nlm.nih.gov/18671678","citation_count":24,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"15943776","id":"PMC_15943776","title":"Reducing Gal expression on the pig organ - a retrospective review.","date":"2005","source":"Xenotransplantation","url":"https://pubmed.ncbi.nlm.nih.gov/15943776","citation_count":23,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32431618","id":"PMC_32431618","title":"Quercetin Attenuates d-GaLN-Induced L02 Cell Damage by Suppressing Oxidative Stress and Mitochondrial Apoptosis via Inhibition of HMGB1.","date":"2020","source":"Frontiers in pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/32431618","citation_count":23,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"28901440","id":"PMC_28901440","title":"Autophagy and ER stress in LPS/GalN‑induced acute liver injury.","date":"2017","source":"Molecular medicine reports","url":"https://pubmed.ncbi.nlm.nih.gov/28901440","citation_count":23,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"28689811","id":"PMC_28689811","title":"AMPK activation ameliorates D-GalN/LPS-induced acute liver failure by upregulating Foxo3A to induce autophagy.","date":"2017","source":"Experimental cell research","url":"https://pubmed.ncbi.nlm.nih.gov/28689811","citation_count":23,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"34208966","id":"PMC_34208966","title":"Probiotic Bacteria with High Alpha-Gal Content Protect Zebrafish against Mycobacteriosis.","date":"2021","source":"Pharmaceuticals (Basel, Switzerland)","url":"https://pubmed.ncbi.nlm.nih.gov/34208966","citation_count":23,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9988484","id":"PMC_9988484","title":"Nitrogen control of the glnN gene that codes for GS type III, the only glutamine synthetase in the cyanobacterium Pseudanabaena sp. PCC 6903.","date":"1998","source":"Molecular microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/9988484","citation_count":22,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"33378967","id":"PMC_33378967","title":"Research progress on the role of gal-3 in cardio/cerebrovascular diseases.","date":"2020","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/33378967","citation_count":22,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9928171","id":"PMC_9928171","title":"Gonadal steroid-dependent GAL-IR cells within the medial preoptic nucleus (MPN) and the stimulatory effects of GAL within the MPN on sexual behaviors.","date":"1998","source":"Annals of the New York Academy of Sciences","url":"https://pubmed.ncbi.nlm.nih.gov/9928171","citation_count":22,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"27181579","id":"PMC_27181579","title":"Amoebiasis vaccine development: A snapshot on E. histolytica with emphasis on perspectives of Gal/GalNAc lectin.","date":"2016","source":"International journal of biological macromolecules","url":"https://pubmed.ncbi.nlm.nih.gov/27181579","citation_count":22,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"32473572","id":"PMC_32473572","title":"The improvement effect of gastrodin on LPS/GalN-induced fulminant hepatitis via inhibiting inflammation and apoptosis and restoring autophagy.","date":"2020","source":"International immunopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/32473572","citation_count":21,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"28586153","id":"PMC_28586153","title":"MiR-19a Affects Hepatocyte Autophagy via Regulating lncRNA NBR2 and AMPK/PPARα in D-GalN/Lipopolysaccharide-Stimulated Hepatocytes.","date":"2017","source":"Journal of cellular biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/28586153","citation_count":21,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"28572155","id":"PMC_28572155","title":"Elastin receptor (S-gal) occupancy by elastin peptides modulates T-cell response during murine emphysema.","date":"2017","source":"American journal of physiology. Lung cellular and molecular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/28572155","citation_count":21,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"35216164","id":"PMC_35216164","title":"Association of Tim-3/Gal-9 Axis with NLRC4 Inflammasome in Glioma Malignancy: Tim-3/Gal-9 Induce the NLRC4 Inflammasome.","date":"2022","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/35216164","citation_count":21,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"38390396","id":"PMC_38390396","title":"Tick bite-induced alpha-gal syndrome and immunologic responses in an alpha-gal deficient murine model.","date":"2024","source":"Frontiers in immunology","url":"https://pubmed.ncbi.nlm.nih.gov/38390396","citation_count":20,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"12477932","id":"PMC_12477932","title":"Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.","date":"2002","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/12477932","citation_count":1479,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"26186194","id":"PMC_26186194","title":"The BioPlex Network: A Systematic Exploration of the Human Interactome.","date":"2015","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/26186194","citation_count":1118,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"28514442","id":"PMC_28514442","title":"Architecture of the human interactome defines protein communities and disease networks.","date":"2017","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/28514442","citation_count":1085,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"25416956","id":"PMC_25416956","title":"A proteome-scale map of the human interactome network.","date":"2014","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/25416956","citation_count":977,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"32296183","id":"PMC_32296183","title":"A reference map of the human binary protein interactome.","date":"2020","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/32296183","citation_count":849,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"33961781","id":"PMC_33961781","title":"Dual proteome-scale networks reveal cell-specific remodeling of the human interactome.","date":"2021","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/33961781","citation_count":705,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"21873635","id":"PMC_21873635","title":"Phylogenetic-based propagation of functional annotations within the Gene Ontology consortium.","date":"2011","source":"Briefings in bioinformatics","url":"https://pubmed.ncbi.nlm.nih.gov/21873635","citation_count":656,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"21042317","id":"PMC_21042317","title":"Genome-wide association study of major depressive disorder: new results, meta-analysis, and lessons learned.","date":"2010","source":"Molecular psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/21042317","citation_count":347,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"7524088","id":"PMC_7524088","title":"Molecular cloning of a functional human galanin receptor.","date":"1994","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/7524088","citation_count":314,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"2447134","id":"PMC_2447134","title":"Ontogeny of peptide- and amine-containing neurones in motor, sensory, and autonomic regions of rat and human spinal cord, dorsal root ganglia, and rat skin.","date":"1987","source":"The Journal of comparative neurology","url":"https://pubmed.ncbi.nlm.nih.gov/2447134","citation_count":226,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"24517231","id":"PMC_24517231","title":"Coevolution of the spexin/galanin/kisspeptin family: Spexin activates galanin receptor type II and III.","date":"2014","source":"Endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/24517231","citation_count":188,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"18518925","id":"PMC_18518925","title":"Genetic susceptibility to heroin addiction: a candidate gene association study.","date":"2008","source":"Genes, brain, and behavior","url":"https://pubmed.ncbi.nlm.nih.gov/18518925","citation_count":176,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"19913121","id":"PMC_19913121","title":"Gene-centric association signals for lipids and apolipoproteins identified via the HumanCVD BeadChip.","date":"2009","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/19913121","citation_count":164,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"19322201","id":"PMC_19322201","title":"Ubiquitin-mediated proteolysis of HuR by heat shock.","date":"2009","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/19322201","citation_count":142,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"19874574","id":"PMC_19874574","title":"Genetical genomic determinants of alcohol consumption in rats and humans.","date":"2009","source":"BMC biology","url":"https://pubmed.ncbi.nlm.nih.gov/19874574","citation_count":135,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"23597562","id":"PMC_23597562","title":"Inhibition of tumor angiogenesis and growth by a small-molecule multi-FGF receptor blocker with allosteric properties.","date":"2013","source":"Cancer cell","url":"https://pubmed.ncbi.nlm.nih.gov/23597562","citation_count":113,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"1710578","id":"PMC_1710578","title":"Human galanin: primary structure and identification of two molecular forms.","date":"1991","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/1710578","citation_count":107,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"1698834","id":"PMC_1698834","title":"Galanin immunoreactive neurons in the human hypothalamus: colocalization with vasopressin-containing neurons.","date":"1990","source":"The Journal of comparative neurology","url":"https://pubmed.ncbi.nlm.nih.gov/1698834","citation_count":90,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"2427385","id":"PMC_2427385","title":"Distribution and molecular heterogeneity of galanin in human, pig, guinea pig, and rat gastrointestinal tracts.","date":"1986","source":"Gastroenterology","url":"https://pubmed.ncbi.nlm.nih.gov/2427385","citation_count":84,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"25917569","id":"PMC_25917569","title":"Galanin modulates the neural niche to favour perineural invasion in head and neck cancer.","date":"2015","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/25917569","citation_count":84,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"19086053","id":"PMC_19086053","title":"Identification of new putative susceptibility genes for several psychiatric disorders by association analysis of regulatory and non-synonymous SNPs of 306 genes involved in neurotransmission and neurodevelopment.","date":"2009","source":"American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/19086053","citation_count":81,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"2423990","id":"PMC_2423990","title":"Distribution of galanin immunoreactivity in the genitourinary tract of man and rat.","date":"1986","source":"Peptides","url":"https://pubmed.ncbi.nlm.nih.gov/2423990","citation_count":81,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"32814053","id":"PMC_32814053","title":"Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains.","date":"2020","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/32814053","citation_count":79,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"24706871","id":"PMC_24706871","title":"Brain galanin system genes interact with life stresses in depression-related phenotypes.","date":"2014","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/24706871","citation_count":77,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"1722333","id":"PMC_1722333","title":"Isolation and primary structure of pituitary human galanin, a 30-residue nonamidated neuropeptide.","date":"1991","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/1722333","citation_count":73,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"2444569","id":"PMC_2444569","title":"The distribution of substance P-, CGRP-, galanin- and ANP-like immunoreactive nerves in human sweat glands.","date":"1987","source":"The Histochemical journal","url":"https://pubmed.ncbi.nlm.nih.gov/2444569","citation_count":73,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"18577758","id":"PMC_18577758","title":"Dissociation of heterotrimeric g proteins in cells.","date":"2008","source":"Science signaling","url":"https://pubmed.ncbi.nlm.nih.gov/18577758","citation_count":69,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"16314872","id":"PMC_16314872","title":"Association of galanin haplotypes with alcoholism and anxiety in two ethnically distinct populations.","date":"2006","source":"Molecular psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/16314872","citation_count":67,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"9685625","id":"PMC_9685625","title":"Molecular characterization, pharmacological properties and chromosomal localization of the human GALR2 galanin receptor.","date":"1998","source":"Brain research. Molecular brain research","url":"https://pubmed.ncbi.nlm.nih.gov/9685625","citation_count":66,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"12769595","id":"PMC_12769595","title":"Galanin: a biologically active peptide.","date":"2002","source":"Current drug targets. CNS and neurological disorders","url":"https://pubmed.ncbi.nlm.nih.gov/12769595","citation_count":63,"is_preprint":false,"source_track":"gene2pubmed"}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":51515,"output_tokens":1325,"usd":0.08721},"stage2":{"model":"claude-opus-4-6","input_tokens":4558,"output_tokens":1739,"usd":0.099397},"total_usd":0.469191,"stage1_batch_id":"msgbatch_01DzrsgVgYngY1hvM3DU1yF2","stage2_batch_id":"msgbatch_01KA9b7iRzKFdhoBUT7vCvSe","note":"batch pricing = 50% of standard","round2_stage1":{"model":"claude-sonnet-4-6","input_tokens":65149,"output_tokens":4755,"usd":0.133386},"round2_rules_fired":"R3","round2_stage2":{"model":"claude-opus-4-6","input_tokens":7263,"output_tokens":2526,"usd":0.149198}},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1999,\n      \"finding\": \"GMAP-210 (encoded by TRIP11) is a cis-Golgi network peripheral protein that directly binds microtubule minus ends via its C-terminal domain, while its N-terminal domain anchors to Golgi membranes; overexpression causes Golgi enlargement dependent on the C-terminal microtubule-binding domain.\",\n      \"method\": \"In vitro microtubule binding assays, deletion analysis, GFP-fusion live imaging, overexpression/dominant-negative studies\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — direct in vitro binding assay with deletion mapping, validated by live imaging and overexpression phenotypes\",\n      \"pmids\": [\"10189370\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"GMAP-210 recruits γ-tubulin-containing complexes to cis-Golgi membranes independently of microtubule polymerization and Golgi localization; its depletion by RNAi causes extensive Golgi fragmentation, supporting a role in Golgi ribbon formation and microtubule anchoring at the Golgi.\",\n      \"method\": \"RNAi depletion, overexpression, γ-tubulin co-localization, mitochondria retargeting experiment, immunofluorescence\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (RNAi phenotype, retargeting assay, overexpression) in a high-impact study\",\n      \"pmids\": [\"15294158\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Overexpression of GMAP-210 blocks both anterograde ER-to-Golgi transport (of soluble alkaline phosphatase and membrane-bound hemagglutinin) and retrograde Golgi-to-ER transport (of Shiga toxin B-subunit), leading to total Golgi disassembly and accumulation of vesicle clusters.\",\n      \"method\": \"Overexpression with cargo transport assays (alkaline phosphatase, hemagglutinin, Shiga toxin B), ultrastructural analysis\",\n      \"journal\": \"Traffic (Copenhagen, Denmark)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple cargo transport assays with ultrastructural validation\",\n      \"pmids\": [\"12383348\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Loss-of-function mutations in TRIP11 (encoding GMAP-210) cause achondrogenesis type 1A in humans and a lethal skeletal dysplasia in mice; GMAP-210-deficient chondrocytes show disturbed Golgi architecture, altered glycosylation, and intracellular accumulation of perlecan (but not collagen II or aggrecan), indicating a selective role in glycosylation and protein trafficking.\",\n      \"method\": \"Positional cloning, murine knockout model, Golgi morphology analysis, glycosylation assays in fibroblasts/chondrocytes, immunofluorescence for matrix proteins, human patient sequencing\",\n      \"journal\": \"The New England journal of medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — loss-of-function in mouse and human with multiple cellular and biochemical readouts\",\n      \"pmids\": [\"20089971\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"GMAP-210 is required for efficient anterograde trafficking at both the ERGIC and Golgi complex, and for retrograde trafficking to the ER; it acts partially redundantly with golgin GM130 for anterograde cargo delivery to the cis-Golgi.\",\n      \"method\": \"Co-depletion experiments (siRNA), cargo transport assays, epistasis by double knockdown\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — co-depletion epistasis with multiple trafficking assays, replicating and extending prior work\",\n      \"pmids\": [\"25717001\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"GMAP-210 (TRIP11) is a cis-Golgi peripheral coiled-coil protein that tethers the cis-Golgi network to microtubule minus ends via a C-terminal microtubule-binding domain and an N-terminal Golgi membrane-anchoring domain; it recruits γ-tubulin complexes to Golgi membranes, is required for Golgi ribbon integrity, and facilitates both anterograde (ER→ERGIC→cis-Golgi) and retrograde (Golgi→ER) membrane trafficking, with partial functional redundancy with GM130; loss of GMAP-210 selectively impairs glycosylation and trafficking of specific cargo (e.g., perlecan) in chondrocytes, causing the human skeletal dysplasia achondrogenesis type 1A.\"\n}\n```\n\n--- ROUND 2 (R2/R3, augmented corpus) ---\n\nI'll systematically classify each paper, then extract discoveries only from KEEP papers.\n\n**Classification summary:**\n\nThe query gene is **GAL** = human galanin (neuropeptide, gene symbol GAL, chromosome 11q13.3).\n\n**KEEP papers** (about canonical galanin neuropeptide/gene):\n- Gene2pubmed [9]: GALR1 cloning (habert-ortoli 1994, PMID:7524088)\n- Gene2pubmed [11]: Spexin/galanin/kisspeptin coevolution, GALR2/3 activation (PMID:24517231)\n- Gene2pubmed [17]: Human galanin primary structure (PMID:1710578)\n- Gene2pubmed [18]: Galanin in human hypothalamus, colocalization with vasopressin (PMID:1698834)\n- Gene2pubmed [19]: Galanin distribution/heterogeneity GI tract (PMID:2427385)\n- Gene2pubmed [20]: Galanin modulates neural niche, PNI via GALR2 (PMID:25917569)\n- Gene2pubmed [22]: Galanin distribution genitourinary tract (PMID:2423990)\n- Gene2pubmed [25]: Human galanin primary structure, pituitary (PMID:1722333)\n- Gene2pubmed [29]: GALR2 molecular characterization (PMID:9685625)\n- Gene2pubmed [30]: Galanin review - biologically active peptide (PMID:12769595)\n- Corpus [14]: LIF and GAL/GMAP expression in DRG after axotomy (PMID:8951409) — GMAP here = galanin-message associated peptide, a cleavage product of the GAL prepropeptide — KEEP\n- Corpus [56]: GMAP and galanin upregulation after RTX (PMID:8595209) — KEEP\n- Corpus [94]: GAL in MPN, sexual behavior (PMID:9928171) — KEEP\n- Gene2pubmed [10]: Ontogeny, galanin in spinal cord (PMID:2447134) — KEEP (localization)\n- Gene2pubmed [24]: Brain galanin system genes interact with life stresses (PMID:24706871) — KEEP (genetic association, but mentions mechanism of galanin as cotransmitter)\n- Gene2pubmed [26]: Galanin in sweat glands (PMID:2444569) — KEEP (localization)\n\n**EXCLUDE papers:**\n- GMAP-210 papers (PMID:15294158, 10189370, 20089971, 12383348, 25717001) — GMAP-210 is TRIP11/TRIP11 gene, not GAL\n- All alpha-Gal/Gal antigen/xenotransplantation papers — about galactose epitope, not GAL neuropeptide\n- All yeast GAL pathway papers — symbol collision (yeast galactose metabolism)\n- GMAP bioinformatics aligner papers — symbol collision\n- D-GalN/LPS liver injury papers — about D-galactosamine, not GAL gene\n- E. coli gal operon papers — symbol collision\n- Bacterial/cyanobacterial glnN/gal papers — symbol collision\n- Fusobacterium Fap2/Gal-GalNAc paper — about bacterial lectin\n- NGAL/lipocalin paper — different gene\n- Galectin-3 (GAL-3/LGALS3) papers — different gene (LGALS3, not GAL)\n- LAG-3 paper — different gene\n- Tim-3/Gal-9 paper — Gal-9 = galectin-9 (LGALS9), not GAL\n- Gal-Gal pyelonephritis pili paper — bacterial pili\n- Alpha-Gal syndrome papers — about carbohydrate epitope\n- S-gal elastin receptor paper — about spliced galactosidase, not GAL neuropeptide\n- BioPlex/interactome papers — large-scale, no specific GAL mechanism described\n- GWAS/association papers (MDD, alcoholism, heroin) — expression/association only\n- GAL-021 breathing modulator paper (PMID:26352381) — GAL-021 is a drug compound, not the GAL gene\n- HuR ubiquitination paper — unrelated\n- X-gal/LacZ papers — unrelated\n\nNow extracting discoveries from KEEP papers:\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1991,\n      \"finding\": \"Human galanin (GAL) exists in two molecular forms: a 30-amino acid non-amidated peptide and a 19-amino acid truncated form, both sharing the N-terminal 15 residues with other mammalian galanins but differing at the C-terminus (human galanin lacks C-terminal amidation unlike porcine/rat galanin). Both forms were isolated from human large intestine and confirmed by amino acid analysis, sequence analysis, and mass spectrometry.\",\n      \"method\": \"Peptide isolation, amino acid sequencing, mass spectrometry\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — direct protein isolation with multiple orthogonal structural methods, replicated in multiple patients\",\n      \"pmids\": [\"1710578\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1991,\n      \"finding\": \"Human galanin isolated from pituitary is a 30-residue non-amidated neuropeptide (C-terminal serine free acid), confirmed by Edman degradation and mass spectrometry. Synthetic human galanin retains full biological activity on isolated rat fundus muscle strips, demonstrating functional equivalence of the non-amidated form.\",\n      \"method\": \"Peptide isolation, Edman degradation, mass spectrometry, bioassay on smooth muscle\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — direct protein isolation, structural determination by multiple methods, and functional bioassay\",\n      \"pmids\": [\"1722333\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1986,\n      \"finding\": \"Galanin immunoreactivity is distributed throughout the human and rat gastrointestinal tract, predominantly in the muscle layer, with two distinct molecular forms identified in humans by gel chromatography and HPLC, one of which likely has a C-terminal extension relative to porcine galanin.\",\n      \"method\": \"Radioimmunoassay, gel chromatography, HPLC with two-antibody characterization\",\n      \"journal\": \"Gastroenterology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal biochemical methods in human tissue, single study\",\n      \"pmids\": [\"2427385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1986,\n      \"finding\": \"Galanin is present in substantial quantities in human genitourinary tract (highest in vas deferens, corpus cavernosum, vagina, cervix), localizing to nerve fibers within smooth muscle and around blood vessels, suggesting a neurocrine role in regulating smooth muscle tone and blood flow. Two molecular forms were detected in human tissue by gel chromatography.\",\n      \"method\": \"Radioimmunoassay, immunocytochemistry, gel chromatography\",\n      \"journal\": \"Peptides\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — direct localization with biochemical characterization, single study\",\n      \"pmids\": [\"2423990\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1987,\n      \"finding\": \"Galanin-immunoreactive nerve fibers are present around human eccrine sweat glands, with immunoreactivity localized to large dense-cored vesicles at the ultrastructural level, indicating peptidergic neurosecretion.\",\n      \"method\": \"Immunocytochemistry (light and electron microscopy)\",\n      \"journal\": \"The Histochemical journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ultrastructural localization to dense-cored vesicles, single study\",\n      \"pmids\": [\"2444569\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1987,\n      \"finding\": \"Galanin-immunoreactive neurons are present throughout the developing rat and human spinal cord and dorsal root ganglia, appearing earlier in motor than in sensory or autonomic regions, with a pronounced perinatal increase of galanin-immunoreactive fibers in dorsal horn coinciding with DRG cell body expression.\",\n      \"method\": \"Immunohistochemistry in developmental series (rat and human tissue)\",\n      \"journal\": \"The Journal of comparative neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — systematic developmental immunohistochemical mapping, single study\",\n      \"pmids\": [\"2447134\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1990,\n      \"finding\": \"In the human hypothalamus, galanin-immunoreactive neurons are concentrated in suprachiasmatic, supraoptic, paraventricular, arcuate, and other nuclei. Galanin colocalizes predominantly with arginine vasopressin (AVP) in supraoptic and paraventricular nuclei and to a lesser extent with oxytocin, demonstrated in adjacent paraffin sections.\",\n      \"method\": \"Immunohistochemistry with two antibodies on human post-mortem brain\",\n      \"journal\": \"The Journal of comparative neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct colocalization in human tissue with neuronal counting, single study\",\n      \"pmids\": [\"1698834\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"A functional human galanin receptor (GALR1) was cloned from a Bowes melanoma cDNA library. The receptor is a 349-amino acid GPCR with seven transmembrane domains that binds human, porcine, and rat galanin with high affinity (Kd in nanomolar range) and mediates galanin inhibition of adenylate cyclase through pertussis toxin-sensitive Gi/Go proteins.\",\n      \"method\": \"cDNA expression cloning, radioligand binding assay, adenylate cyclase inhibition assay in COS cells\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — receptor cloning with functional reconstitution in heterologous cells and pharmacological characterization\",\n      \"pmids\": [\"7524088\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"Galanin (GAL) and its co-encoded peptide GMAP (galanin message-associated peptide) expression is dramatically upregulated in rat dorsal root ganglion neurons following sciatic nerve axotomy (50–60% of profiles become immunoreactive). Leukemia inhibitory factor (LIF) is required for this upregulation, as LIF-deficient mice show 65–70% reduction in GAL/GMAP-positive neuron profiles after axotomy.\",\n      \"method\": \"Immunohistochemistry in LIF-knockout vs. wild-type mice after axotomy\",\n      \"journal\": \"Experimental brain research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function (LIF KO) with defined cellular phenotype, replicated across multiple peptide markers\",\n      \"pmids\": [\"8951409\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"Following systemic resiniferatoxin (RTX, capsaicin analogue) treatment, galanin mRNA is upregulated ~3-fold in rat dorsal root ganglion neurons (from ~10% to ~30% of neurons positive), with parallel increases in GMAP immunoreactivity, demonstrating that capsaicin-sensitive sensory neuron injury triggers GAL gene transcriptional upregulation ('messenger plasticity').\",\n      \"method\": \"In situ hybridization and immunohistochemistry in rat DRG\",\n      \"journal\": \"Neuroreport\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — parallel mRNA and protein measurements in injury model, single study\",\n      \"pmids\": [\"8595209\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Galanin (GAL) microinjection into the medial preoptic nucleus (MPN) stimulates both male-typical and female-typical sexual behaviors in rats; immunoneutralization of endogenous GAL within the MPN with anti-GAL serum inhibits male-typical sexual behavior. More GAL-immunoreactive cells exist in the MPN of male than female rats, and gonadal steroids (estrogen, testosterone) increase the number and size of GAL-IR cells and their processes within the MPN.\",\n      \"method\": \"Intracerebral microinjection, immunoneutralization, immunohistochemistry in gonadectomized and hormone-replaced rats\",\n      \"journal\": \"Annals of the New York Academy of Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function (immunoneutralization) and gain-of-function (microinjection) with defined behavioral phenotype, single study\",\n      \"pmids\": [\"9928171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Human GALR2 galanin receptor is a 387-amino acid GPCR encoded on chromosome 17q25.3. It couples to both Gαq/11 (stimulating phospholipase C and increasing intracellular calcium) and Gαi/o (inhibiting cAMP accumulation). It binds galanin and N-terminal galanin fragments with high affinity but not C-terminal fragments, and is widely expressed in CNS and peripheral tissues.\",\n      \"method\": \"Genomic/cDNA cloning, FISH chromosomal mapping, radioligand binding, calcium mobilization assay, cAMP inhibition assay in HEK-293 cells\",\n      \"journal\": \"Brain research. Molecular brain research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — receptor cloning with multiple functional assays (dual G-protein coupling demonstrated), structural and pharmacological characterization\",\n      \"pmids\": [\"9685625\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Galanin inhibits acetylcholine release in the central nervous system and modulates growth hormone, prolactin, and luteinizing hormone release; inhibits glucose-induced insulin secretion; and affects gastrointestinal motility. GAL expression is elevated by estrogen, neuronal activation, denervation/nerve injury, and during development. Three receptor subtypes (GALR1, GALR2, GALR3) mediate these effects.\",\n      \"method\": \"Review synthesizing multiple experimental studies\",\n      \"journal\": \"Current drug targets. CNS and neurological disorders\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — review compiling established experimental findings across multiple studies\",\n      \"pmids\": [\"12769595\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Spexin (SPX) activates galanin receptor subtypes GALR2 and GALR3 (but not GALR1), with higher potency toward GALR3 than galanin itself. Syntenic and phylogenetic analysis shows that spexin, GAL, and kisspeptin genes arose by local duplications before two rounds of whole-genome duplication, and their cognate receptors co-evolved. This was validated by functional assays in human, Xenopus, and zebrafish GALR2/3.\",\n      \"method\": \"Synteny analysis, phylogenetic reconstruction, ligand-receptor functional assays across species (calcium mobilization/cAMP)\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — functional receptor assays across multiple species combined with evolutionary genomics, demonstrating SPX as alternative GALR2/3 ligand\",\n      \"pmids\": [\"24517231\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"In head and neck squamous cell carcinoma, galanin (GAL) secreted by perineural nerves activates GALR2 on cancer cells, triggering NFATC2-mediated transcription of cyclooxygenase-2 (COX-2) and GAL itself. Prostaglandin E2 downstream of COX-2 promotes cancer invasion, and GAL released by cancer cells induces neuritogenesis in a feedback loop that facilitates perineural invasion (PNI). Demonstrated using an in vivo PNI model.\",\n      \"method\": \"In vivo perineural invasion model, receptor knockdown/overexpression, transcription factor (NFATC2) assays, COX-2/PGE2 pathway analysis\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — novel in vivo model with multiple orthogonal mechanistic experiments (receptor, transcription factor, downstream mediator), single lab but comprehensive\",\n      \"pmids\": [\"25917569\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"Galanin (GAL) is a 30-amino acid (human) non-amidated neuropeptide co-encoded with GMAP in its precursor, widely distributed in CNS, PNS, and endocrine tissues; it signals through three GPCRs (GALR1 coupled to Gi/o-mediated adenylate cyclase inhibition; GALR2/3 coupled to both Gαq/11 and Gαi/o), modulates neurotransmitter release (inhibiting acetylcholine), regulates hormone secretion (growth hormone, insulin, LH) and sexual behavior via the medial preoptic nucleus, and is transcriptionally upregulated in sensory neurons after injury in a LIF-dependent manner; in cancer, nerve-derived GAL activates GALR2 to drive NFATC2-COX-2-PGE2 signaling and perineural invasion, while spexin has been identified as an additional endogenous GALR2/3 ligand.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"GMAP-210 (encoded by TRIP11) is a cis-Golgi-associated coiled-coil tethering protein that links Golgi membranes to microtubule minus ends through a bipartite architecture: its N-terminal domain anchors to Golgi membranes while its C-terminal domain directly binds microtubule minus ends, and it additionally recruits γ-tubulin complexes to cis-Golgi membranes independently of microtubule polymerization [PMID:10189370, PMID:15294158]. GMAP-210 is required for Golgi ribbon integrity and facilitates both anterograde (ER→ERGIC→cis-Golgi) and retrograde (Golgi→ER) membrane trafficking, acting partially redundantly with the golgin GM130 for anterograde cargo delivery [PMID:12383348, PMID:25717001]. Loss-of-function mutations in TRIP11 cause achondrogenesis type 1A in humans and lethal skeletal dysplasia in mice, with GMAP-210-deficient chondrocytes exhibiting disturbed Golgi architecture, altered glycosylation, and selective intracellular retention of perlecan but not collagen II or aggrecan [PMID:20089971].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Establishing how GMAP-210 physically connects Golgi membranes to the microtubule cytoskeleton resolved the long-standing question of how cis-Golgi positioning is maintained near the centrosome.\",\n      \"evidence\": \"In vitro microtubule binding assays with deletion constructs and GFP-fusion live imaging in mammalian cells\",\n      \"pmids\": [\"10189370\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Structural basis of C-terminal microtubule minus-end recognition not determined\",\n        \"Identity of the N-terminal Golgi membrane receptor unknown\",\n        \"Whether GMAP-210 functions alone or with other golgins in tethering not addressed\"\n      ]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Demonstrating that GMAP-210 overexpression blocks both anterograde and retrograde trafficking established it as a bidirectional tethering factor rather than a unidirectional transport component.\",\n      \"evidence\": \"Overexpression with multiple cargo transport assays (alkaline phosphatase, hemagglutinin, Shiga toxin B) and ultrastructural analysis\",\n      \"pmids\": [\"12383348\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether the block reflects a stoichiometric titration of partners or direct tethering dysfunction not resolved\",\n        \"Loss-of-function trafficking phenotype not yet tested\"\n      ]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Showing that GMAP-210 recruits γ-tubulin complexes to Golgi membranes and that its depletion fragments the Golgi ribbon revealed a dual role in both microtubule nucleation at the Golgi and Golgi structural maintenance.\",\n      \"evidence\": \"RNAi depletion, mitochondrial retargeting assay, γ-tubulin co-localization in mammalian cells\",\n      \"pmids\": [\"15294158\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Direct interaction interface between GMAP-210 and γ-tubulin complex components not mapped\",\n        \"Whether Golgi-nucleated microtubules depend on GMAP-210-recruited γ-tubulin not tested\"\n      ]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Identifying TRIP11 loss-of-function as the cause of achondrogenesis type 1A linked GMAP-210's trafficking function to a specific human disease and revealed unexpected cargo selectivity, with perlecan but not collagen II or aggrecan being mistrafficked.\",\n      \"evidence\": \"Positional cloning, murine knockout, human patient sequencing, glycosylation assays and immunofluorescence in chondrocytes and fibroblasts\",\n      \"pmids\": [\"20089971\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Molecular basis for cargo-selective trafficking defects (why perlecan but not collagen II) unknown\",\n        \"Whether glycosylation defects are primary or secondary to Golgi structural disruption not resolved\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Epistasis experiments with GM130 co-depletion revealed partial functional redundancy between GMAP-210 and GM130 at the cis-Golgi, defining the combinatorial tethering logic for anterograde cargo delivery.\",\n      \"evidence\": \"siRNA co-depletion with multiple cargo transport assays in mammalian cells\",\n      \"pmids\": [\"25717001\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether GMAP-210 and GM130 act on the same vesicle populations or different subsets not determined\",\n        \"Additional golgins that may compensate beyond GM130 not systematically tested\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The structural basis of GMAP-210's cargo selectivity, its precise mechanism of vesicle capture at the cis-Golgi, and the functional significance of Golgi-associated γ-tubulin recruitment for microtubule nucleation and cell physiology remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"No reconstitution of GMAP-210-mediated vesicle tethering in vitro\",\n        \"No high-resolution structure of GMAP-210 or its complexes\",\n        \"Mechanism by which GMAP-210 selects specific cargo for trafficking not elucidated\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [0, 1, 2, 3]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [2, 4]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [1, 3]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [3]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"TUBG1\",\n      \"GOLGA2\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```\n\n--- ROUND 2 (R2/R3, augmented corpus) ---\n\n```json\n{\n  \"mechanistic_narrative\": \"Galanin (GAL) is a neuropeptide that functions as a widespread neuromodulator and endocrine regulator, controlling neurotransmitter release, hormone secretion, smooth muscle tone, and sexual behavior through three G protein-coupled receptors (GALR1–3). Human GAL is a 30-amino acid non-amidated peptide processed from a precursor that also yields GMAP; it signals via GALR1-coupled Gi/o inhibition of adenylate cyclase and GALR2-coupled Gαq/11 activation of phospholipase C, while spexin serves as an additional endogenous GALR2/3 ligand [PMID:7524088, PMID:9685625, PMID:24517231]. GAL expression is transcriptionally upregulated in sensory neurons after peripheral nerve injury in a leukemia inhibitory factor (LIF)-dependent manner, and within the medial preoptic nucleus GAL mediates gonadal steroid-regulated sexual behavior [PMID:8951409, PMID:9928171]. In head and neck squamous cell carcinoma, nerve-derived GAL activates GALR2 on cancer cells to drive an NFATC2–COX-2–PGE2 signaling cascade that promotes perineural invasion and a neuritogenic feedback loop [PMID:25917569].\",\n  \"teleology\": [\n    {\n      \"year\": 1986,\n      \"claim\": \"Mapping GAL peptide distribution in human peripheral tissues established that galanin is not solely a CNS neuropeptide but is broadly expressed in gastrointestinal and genitourinary nerve fibers, implying roles in smooth muscle regulation and neurocrine signaling.\",\n      \"evidence\": \"Radioimmunoassay, immunocytochemistry, and gel chromatography in human GI and genitourinary tissues identifying two molecular forms and nerve-fiber localization\",\n      \"pmids\": [\"2427385\", \"2423990\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequences of galanin on peripheral smooth muscle in human tissues were not tested\", \"Identity of the two molecular forms was not resolved at the sequence level\"]\n    },\n    {\n      \"year\": 1987,\n      \"claim\": \"Developmental and ultrastructural studies showed GAL is packaged in large dense-cored vesicles for regulated secretion and is expressed in defined developmental windows in spinal cord and DRG, establishing it as a regulated neuropeptide with potential developmental roles.\",\n      \"evidence\": \"Immunohistochemistry at light and electron microscopy levels in rat/human developing spinal cord, DRG, and human sweat glands\",\n      \"pmids\": [\"2444569\", \"2447134\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional role of galanin in spinal cord development was not tested\", \"Secretion dynamics were not measured\"]\n    },\n    {\n      \"year\": 1990,\n      \"claim\": \"Colocalization of GAL with vasopressin in human hypothalamic magnocellular neurons suggested a neuromodulatory role in neuroendocrine circuits controlling fluid balance and hormone release.\",\n      \"evidence\": \"Dual immunohistochemistry on human post-mortem hypothalamus with cell counting across nuclei\",\n      \"pmids\": [\"1698834\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional interaction between galanin and AVP release was not demonstrated\", \"Single study on post-mortem tissue\"]\n    },\n    {\n      \"year\": 1991,\n      \"claim\": \"Isolation and complete sequencing of human GAL from intestine and pituitary resolved a longstanding species discrepancy: human galanin is a 30-residue non-amidated peptide (unlike amidated porcine/rat forms) that retains full biological activity.\",\n      \"evidence\": \"Peptide purification, Edman degradation, mass spectrometry from human gut and pituitary; synthetic peptide bioassay on rat fundus\",\n      \"pmids\": [\"1710578\", \"1722333\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether the 19-residue truncated form has distinct biological activity was not resolved\", \"Receptor-binding affinity differences between amidated and non-amidated forms were not quantified\"]\n    },\n    {\n      \"year\": 1994,\n      \"claim\": \"Cloning of GALR1 identified the first high-affinity galanin receptor as a Gi/Go-coupled GPCR that mediates adenylate cyclase inhibition, providing the molecular basis for galanin's inhibitory neuromodulatory actions.\",\n      \"evidence\": \"Expression cloning from Bowes melanoma cDNA, radioligand binding, and pertussis toxin-sensitive cAMP inhibition in COS cells\",\n      \"pmids\": [\"7524088\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological functions assignable specifically to GALR1 versus other receptor subtypes were unknown\", \"Endogenous coupling partners in neurons were not identified\"]\n    },\n    {\n      \"year\": 1995,\n      \"claim\": \"Peripheral nerve injury triggers dramatic upregulation of GAL in DRG sensory neurons, and this response requires LIF signaling, establishing an injury-responsive transcriptional program for galanin.\",\n      \"evidence\": \"Immunohistochemistry and in situ hybridization in LIF-knockout versus wild-type mice after sciatic nerve axotomy; resiniferatoxin injury model in rat DRG\",\n      \"pmids\": [\"8951409\", \"8595209\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream transcription factors mediating LIF-dependent GAL induction were not identified\", \"Functional consequence of GAL upregulation for nerve regeneration was not directly tested\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Cloning of GALR2 revealed a second receptor with dual Gαq/11 and Gαi/o coupling, explaining galanin's ability to both stimulate PLC/calcium signaling and inhibit cAMP, while behavioral studies established GAL as a steroid-regulated mediator of sexual behavior in the medial preoptic nucleus.\",\n      \"evidence\": \"GALR2 cloning with calcium mobilization and cAMP assays in HEK-293 cells; intracerebral GAL microinjection and immunoneutralization in gonadectomized rats\",\n      \"pmids\": [\"9685625\", \"9928171\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relative contributions of GALR1 versus GALR2 in MPN sexual behavior circuits were not dissected\", \"GALR3 functional characterization was still incomplete\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identification of spexin as an endogenous GALR2/3 ligand with higher GALR3 potency than galanin itself redefined the receptor system as multi-ligand and revealed that GAL, spexin, and kisspeptin gene families co-evolved from ancestral duplications.\",\n      \"evidence\": \"Cross-species calcium mobilization and cAMP assays (human, Xenopus, zebrafish GALR2/3) combined with synteny and phylogenetic reconstruction\",\n      \"pmids\": [\"24517231\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological contexts in which spexin versus GAL preferentially activates GALR2/3 remain undefined\", \"Structural basis for spexin selectivity over GALR1 was not determined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"A cancer-relevant signaling circuit was delineated in which nerve-derived GAL activates GALR2 on tumor cells to engage NFATC2–COX-2–PGE2 signaling, promoting perineural invasion and a neuritogenic feedback loop—the first defined oncogenic pathway for galanin.\",\n      \"evidence\": \"In vivo perineural invasion model in head and neck squamous cell carcinoma with GALR2 knockdown/overexpression, NFATC2 reporter assays, and COX-2/PGE2 pathway inhibition\",\n      \"pmids\": [\"25917569\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Generalizability to other cancer types with perineural invasion was not established\", \"Whether GALR1 or GALR3 counteracts or cooperates with GALR2 in this context is unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Major unresolved questions include the specific physiological functions of GAL upregulation during nerve regeneration, the structural determinants of ligand selectivity across GALR1–3, and whether the GAL–GALR2 oncogenic axis operates beyond head and neck cancer.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No direct nerve regeneration phenotype demonstrated in GAL-knockout animals\", \"No crystal/cryo-EM structure of any GALR–ligand complex\", \"GALR3-specific physiological roles remain largely uncharacterized\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [0, 1, 7, 11, 14]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [2, 3, 4, 14]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [7, 11, 14]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [6, 8, 10, 12]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [14]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"GALR1\", \"GALR2\", \"GALR3\", \"NFATC2\", \"AVP\"],\n    \"other_free_text\": []\n  }\n}\n```"}