{"gene":"SNPH","run_date":"2026-06-10T07:46:37","timeline":{"discoveries":[{"year":2008,"finding":"SNPH acts as an axonal mitochondrial docking receptor by interacting with microtubules. Axonal mitochondria containing exogenous or endogenous SNPH lose mobility; deletion of the snph gene in mice results in a substantially higher proportion of mobile axonal mitochondria and reduced axonal mitochondrial density, with enhanced short-term synaptic facilitation rescued by reintroduction of snph.","method":"snph knockout mouse, time-lapse live imaging, genetic rescue, overexpression in neurons","journal":"Cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO with defined cellular phenotype, genetic rescue, multiple orthogonal methods, replicated across labs","pmids":["18191227"],"is_preprint":false},{"year":2009,"finding":"Dynein light chain LC8 binds to a specific seven-residue motif on SNPH, enhancing the SNPH–microtubule docking interaction. LC8 recruits to axonal mitochondria via SNPH; deletion of the LC8-binding motif impairs SNPH-mediated mitochondrial immobilization. LC8 stabilizes an alpha-helical coiled-coil within the SNPH microtubule-binding domain against thermal unfolding. LC8 reduces mitochondrial mobility in snph(+/+) but not snph(-/-) neurons, confirming dependence on SNPH.","method":"Proteomic/biochemical pulldown, mutagenesis, time-lapse live imaging in snph WT and KO neurons, circular dichroism spectroscopy","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — mutagenesis mapping of binding motif, biophysical assay, epistasis via KO neurons, multiple orthogonal methods in single lab","pmids":["19641106"],"is_preprint":false},{"year":2011,"finding":"Genetic deletion of snph in SOD1(G93A) ALS mice doubles the proportion of mobile axonal mitochondria but does not alter disease onset, motor function decline, motor neuron loss, gliosis, or lifespan, indicating that reduced mitochondrial transport seen in SOD1(G93A) mice is not a primary driver of rapid-onset fALS pathology.","method":"Genetic cross of SOD1(G93A) and snph(-/-) mice, time-lapse imaging, behavioral assays, neuropathology","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean double-mutant genetic epistasis in vivo with defined phenotypic readouts, single lab but rigorous","pmids":["21518771"],"is_preprint":false},{"year":2015,"finding":"Deletion of SNPH in Shiverer dysmyelinating mice prolongs survival, reduces cerebellar damage, suppresses oxidative stress, and improves mitochondrial health, demonstrating a context-dependent harmful role of mitochondrial anchoring in demyelination. In contrast, SNPH deletion does not benefit EAE (inflammatory MS model), indicating specificity to the progressive/degenerative phase.","method":"Genetic deletion (SNPH KO) in Shiverer mice and EAE model, survival analysis, neuropathology, oxidative stress assays","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean KO in two disease models with defined phenotypic readouts demonstrating context-dependent function","pmids":["25834054"],"is_preprint":false},{"year":2016,"finding":"SNPH levels increase in mature neurons, causing mitochondrial anchoring that produces local ATP depletion and energy deficits in injured axons after axotomy. Genetic deletion of snph enhances mitochondrial transport, replenishes healthy mitochondria in injured axons, rescues energy deficits, and accelerates axon regeneration in vivo after sciatic nerve crush.","method":"snph KO mice, in vivo sciatic nerve crush, live imaging, ATP measurements, genetic manipulation","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — KO with defined metabolic and regenerative phenotype, in vivo validation, multiple orthogonal methods","pmids":["27268498"],"is_preprint":false},{"year":2016,"finding":"In tumor cells, SNPH (via a network including KIF5B and Miro1/2) anchors mitochondria to the cortical cytoskeleton and thereby suppresses mitochondrial trafficking, cell motility, chemotaxis, and metastasis in vivo. SNPH shRNA knockdown increases mitochondrial speed and distance travelled, repositions mitochondria to the cortical cytoskeleton, and promotes metastasis.","method":"Genome-wide shRNA screen, time-lapse mitochondrial imaging, chemotaxis assays, in vivo metastasis models","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Moderate — functional screen plus KD with defined cellular and in vivo phenotypes, multiple orthogonal assays","pmids":["27991488"],"is_preprint":false},{"year":2017,"finding":"Stressed mitochondria are removed from axons through bulk release of SNPH from stressed mitochondria onto a new class of mitochondria-derived cargos that share retrograde transport on late endosomes toward the soma, independently of Parkin, Drp1, and autophagy. This SNPH-release mechanism is activated during early disease stages in ALS- and AD-linked neurons.","method":"Immuno-electron microscopy, super-resolution imaging, live imaging, genetic manipulation (Parkin/Drp1/autophagy KO/KD), snph KO neurons","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — immuno-EM and super-resolution imaging, epistasis with Parkin/Drp1/autophagy, multiple orthogonal methods in single lab","pmids":["28472658"],"is_preprint":false},{"year":2017,"finding":"Mitochondrial SNPH (alternatively spliced isoform targeted to tumor cell mitochondria) buffers oxidative stress and maintains complex II-dependent bioenergetics, sustaining local tumor cell proliferation while restricting mitochondrial redistribution to the cortical cytoskeleton and limiting tumor cell motility. Hypoxia acutely lowers SNPH levels, shifting cells from proliferative to invasive phenotype.","method":"Isoform characterization, SNPH KD/KO, xenograft and syngeneic tumor models in vivo, metabolic assays, live mitochondrial imaging","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 2 / Moderate — KD/KO with defined metabolic and in vivo metastatic phenotypes, isoform characterization, multiple orthogonal methods","pmids":["28891816"],"is_preprint":false},{"year":2018,"finding":"SNPH is ubiquitinated by the E3 ligase CHIP (STUB1) on Lys111 and Lys153 within its microtubule-binding domain. This ubiquitination does not cause protein degradation but anchors SNPH on tubulin to inhibit mitochondrial motility and dynamics. Ubiquitination-defective SNPH mutants (K111R or K153R) increase mitochondrial speed and distance, reposition mitochondria to the cortical cytoskeleton, increase Drp1 recruitment, and enhance tumor chemotaxis, invasion, and metastasis in vivo.","method":"Global proteomics screen, site-directed mutagenesis (K111R, K153R), in vitro ubiquitination assay, mitochondrial motility imaging, in vivo metastasis models","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — mutagenesis of ubiquitination sites, proteomics identification of E3 ligase, in vivo validation, multiple orthogonal methods","pmids":["29898993"],"is_preprint":false},{"year":2019,"finding":"SNPH is normally excluded from dendrites and targeted to axons. In Shiverer mice (progressive MS model), SNPH is misplaced into dendrites of Purkinje cells. Reconstituting dendritic SNPH intrusion in SNPH-KO mice by viral transduction sensitizes Purkinje cells to excitotoxicity upon climbing fiber stimulation. In vitro, overexpression of SNPH in dendrites causes excitotoxicity via NMDA receptor activation, reduces mitochondrial calcium uptake, and blocks somal mitophagy.","method":"In vivo viral transduction, SNPH-KO mice, live-cell imaging, electrophysiology, calcium imaging, Purkinje cell viability assays","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — viral rescue in KO, in vitro and in vivo experiments, multiple defined mechanistic readouts","pmids":["31618636"],"is_preprint":false},{"year":2021,"finding":"FUS co-localizes with the mitochondrial tethering protein SNPH in neurons. Mutations in FUS alter this co-localization and are associated with changes in mitochondrial numbers and transport in primary neurons and zebrafish models.","method":"Co-localization (immunofluorescence), primary neuron and zebrafish overexpression models, mitochondrial transport assays","journal":"Scientific reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single-lab co-localization without reciprocal Co-IP or direct binding assay; indirect functional link","pmids":["34193962"],"is_preprint":false},{"year":2022,"finding":"IL-1β and NMDA each individually trigger dendritic SNPH intrusion in hippocampal neurons. They interact synergistically: blocking NMDAR with MK-801 prevents IL-1β from triggering dendritic SNPH intrusion, and decoupling IL-1β/NMDAR interaction with tyrosine inhibitors prevents either stimulus from causing intrusion. Neuronal toxicity caused by IL-1β or NMDA is strongly ameliorated in SNPH-/- neurons, placing SNPH downstream of IL-1β/NMDAR crosstalk as the effector of excitotoxicity.","method":"Primary hippocampal cultures from SNPH-/- and WT mice, pharmacological antagonists (MK-801, tyrosine inhibitors), immunofluorescence, cell viability assays","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic (KO) and pharmacological epistasis with two defined signaling inputs, single lab","pmids":["35970564"],"is_preprint":false},{"year":2023,"finding":"SNPH is expressed in oligodendrocyte precursor cells and mature oligodendrocytes and is present in the myelin sheath in vivo. Netrin-1 increases redistribution of SNPH to oligodendrocyte processes during myelin basic protein-positive membrane expansion, and SNPH clusters at the oligodendrocyte plasma membrane at sites of adhesion with netrin-1-coated beads where mitochondria are retained.","method":"Immunofluorescence, live imaging, netrin-1-coated microbead adhesion assay, in vitro oligodendrocyte cultures, in vivo myelin fractionation","journal":"Glia","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — direct localization experiments with functional consequence (mitochondrial retention), single lab, multiple methods","pmids":["37272718"],"is_preprint":false},{"year":2023,"finding":"SNPH knockdown in tumor-bearing mice increases the speed and distance travelled by mitochondria in PMN (neutrophils/PMN-MDSCs), elevates rates of oxidative phosphorylation and glycolysis, and increases adenosine generation, resulting in enhanced spontaneous PMN migration and increased metastasis in SNPH-KO mice.","method":"SNPH-KO mice, mitochondrial motility imaging in PMN, metabolic flux assays, spontaneous migration assays, in vivo metastasis measurement","journal":"Cancer immunology research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean KO with defined cellular and in vivo phenotype plus metabolic mechanism, single lab","pmids":["36548516"],"is_preprint":false},{"year":2024,"finding":"In zebrafish, miR-146b directly suppresses expression of snphb (SNPH ortholog). CRISPR/Cas9 manipulation and single-cell electroporation of the miR-146b-snphb axis enhances axonal mitochondrial trafficking and promotes Mauthner cell axon regeneration and functional recovery after injury.","method":"CRISPR/Cas9, single-cell electroporation, in vivo live imaging of mitochondrial transport, escape response behavioral assay in zebrafish","journal":"Neuroscience bulletin","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — CRISPR KO plus in vivo imaging, zebrafish ortholog, single lab","pmids":["39645618"],"is_preprint":false},{"year":2026,"finding":"HIF-1α transcriptionally activates miR-130a-3p, which targets SNPH mRNA to suppress SNPH protein. SNPH downregulation promotes ROS production, activating the AKT/cdc42/PAK1/Cofilin cascade, leading to filopodia formation and increased CRC cell migration and invasion. SNPH overexpression increases mitochondrial fusion and suppresses liver metastasis in vivo.","method":"Luciferase reporter assay (HIF-1α→miR-130a-3p→SNPH), ROS measurement, AKT/cdc42/PAK1/Cofilin pathway assays, filopodia imaging, in vivo xenograft metastasis model","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter defines transcriptional axis, pathway assays with defined epistasis, in vivo validation, single lab","pmids":["41888092"],"is_preprint":false},{"year":2026,"finding":"BHD treatment activates the Akt/PAK5/SNPH signaling cascade, augmenting mitochondrial recruitment to injured axons after ischemic stroke. Co-immunoprecipitation and molecular docking indicate PAK5 interacts with SNPH. Inhibition of Akt abrogates both neuroprotection and SNPH-mediated mitochondrial recruitment.","method":"Co-immunoprecipitation, molecular docking, surface plasmon resonance, RNA-seq, Western blot, MCAO mouse model with Akt inhibition","journal":"Journal of ethnopharmacology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP and SPR for PAK5-SNPH interaction, pharmacological epistasis in vivo, single lab","pmids":["42134501"],"is_preprint":false},{"year":2025,"finding":"In primary neuronal cultures, p-Tau kinase inhibitors and Tau-KO both completely abolish dendritic SNPH intrusion (DSI), placing tau hyperphosphorylation upstream of SNPH mislocalization into dendrites in a progressive MS model, and establishing DSI as a downstream effector of tauopathy-driven excitotoxicity.","method":"Primary neuronal cultures, pharmacological p-Tau kinase inhibitors, Tau-KO, immunofluorescence for dendritic SNPH localization","journal":"bioRxiv","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — genetic (KO) and pharmacological epistasis, preprint not yet peer-reviewed, single lab","pmids":["bio_10.1101_2025.09.05.674541"],"is_preprint":true}],"current_model":"SNPH (syntaphilin) functions as a neuron-specific (and tumor-cell-expressed) mitochondrial docking receptor that anchors mitochondria to microtubules in axons via a direct MT-binding domain; this anchoring is regulated by dynein light chain LC8 (which stabilizes the SNPH–MT interaction through a defined seven-residue binding motif), by non-degradative ubiquitination on Lys111/Lys153 by the E3 ligase CHIP, and by upstream signals including PAK5 and tau phosphorylation. Release of SNPH from stressed mitochondria mobilizes them for retrograde transport and quality control independent of canonical mitophagy pathways. SNPH is normally excluded from dendrites; pathological mislocalization (dendritic SNPH intrusion) driven by IL-1β/NMDAR signaling and tau hyperphosphorylation causes excitotoxic mitochondrial immobilization and neurodegeneration. In cancer cells, SNPH suppresses mitochondrial trafficking to the cortical cytoskeleton, limiting bioenergetics of cell motility and thereby suppressing metastasis, while in neutrophils SNPH analogously restrains migration."},"narrative":{"mechanistic_narrative":"SNPH (syntaphilin) is a mitochondrial docking receptor that immobilizes mitochondria by tethering them to microtubules, controlling the balance between stationary and motile mitochondrial pools in neurons and other cell types [PMID:18191227]. In axons, SNPH directly engages microtubules; its loss markedly increases the mobile mitochondrial fraction and reduces axonal mitochondrial density, with corresponding effects on synaptic facilitation [PMID:18191227]. The docking interaction is stabilized by the dynein light chain LC8, which binds a defined seven-residue motif on SNPH and rigidifies an alpha-helical coiled-coil within the microtubule-binding domain [PMID:19641106], and by non-degradative ubiquitination on Lys111/Lys153 within that same domain by the E3 ligase CHIP/STUB1, which locks SNPH onto tubulin to restrain motility and dynamics [PMID:29898993]. Anchoring is reversible and stress-responsive: stressed axonal mitochondria undergo bulk release of SNPH onto retrograde late-endosomal cargos for clearance toward the soma, independent of Parkin, Drp1, and autophagy [PMID:28472658]. The physiological consequences of anchoring are strongly context-dependent — SNPH-mediated immobilization causes local ATP depletion that impairs axon regeneration after injury [PMID:27268498], and is harmful in dysmyelinating disease [PMID:25834054], yet does not drive rapid-onset SOD1 ALS pathology [PMID:21518771]. SNPH is normally axon-restricted; pathological intrusion into dendrites driven by IL-1β/NMDAR crosstalk [PMID:35970564] and upstream tau hyperphosphorylation [PMID:bio_10.1101_2025.09.05.674541] produces excitotoxic mitochondrial immobilization and neuronal death [PMID:31618636]. Beyond neurons, SNPH anchors mitochondria away from the cortical cytoskeleton in tumor cells and neutrophils, limiting motility-driving bioenergetics and thereby suppressing metastasis [PMID:27991488, PMID:28891816, PMID:36548516]; a tumor-mitochondrial SNPH isoform additionally buffers oxidative stress and sustains complex II-dependent metabolism [PMID:28891816], and SNPH is transcriptionally downregulated through hypoxia/HIF-1α-driven microRNA axes to promote an invasive phenotype [PMID:41888092].","teleology":[{"year":2008,"claim":"Established the founding function of SNPH: whether a dedicated receptor immobilizes axonal mitochondria was unknown, and this work showed SNPH docks mitochondria to microtubules to set the stationary/motile balance.","evidence":"snph knockout mice, time-lapse live imaging, genetic rescue and overexpression in neurons","pmids":["18191227"],"confidence":"High","gaps":["Direct structural basis of the SNPH–microtubule contact not resolved","Signals that engage or release docking not yet defined"]},{"year":2009,"claim":"Addressed how the docking interaction is stabilized, showing LC8 binds a discrete seven-residue motif and rigidifies the microtubule-binding coiled-coil to strengthen anchoring.","evidence":"Biochemical pulldown, mutagenesis mapping, circular dichroism, time-lapse imaging in snph WT and KO neurons","pmids":["19641106"],"confidence":"High","gaps":["How LC8 binding is regulated dynamically unknown","Stoichiometry of the SNPH–LC8–microtubule assembly not determined"]},{"year":2011,"claim":"Tested whether SNPH-dependent transport defects drive ALS pathology; double-mutant epistasis showed restoring mitochondrial mobility does not alter SOD1(G93A) disease course.","evidence":"Genetic cross of SOD1(G93A) and snph(-/-) mice with behavioral and neuropathological readouts","pmids":["21518771"],"confidence":"High","gaps":["Does not address SNPH roles in slower-onset neurodegeneration","Does not exclude transport involvement in other ALS models"]},{"year":2015,"claim":"Showed mitochondrial anchoring can be actively harmful in a disease-specific manner: SNPH deletion benefits dysmyelinating Shiverer mice but not inflammatory EAE.","evidence":"SNPH KO in Shiverer and EAE models, survival, neuropathology and oxidative stress assays","pmids":["25834054"],"confidence":"High","gaps":["Mechanism distinguishing degenerative vs inflammatory contexts unresolved","Cell type responsible for the benefit not pinpointed"]},{"year":2016,"claim":"Connected anchoring to axonal energy supply and regeneration, showing rising SNPH in mature neurons immobilizes mitochondria, causing ATP deficits that limit axon repair.","evidence":"snph KO mice, in vivo sciatic nerve crush, live imaging, ATP measurements","pmids":["27268498"],"confidence":"High","gaps":["Trigger for the developmental rise in SNPH unknown","Translation to CNS regeneration not established"]},{"year":2016,"claim":"Extended SNPH function beyond neurons, identifying it in a screen as a suppressor of tumor cell mitochondrial trafficking, motility and metastasis.","evidence":"Genome-wide shRNA screen, mitochondrial imaging, chemotaxis and in vivo metastasis models","pmids":["27991488"],"confidence":"High","gaps":["Direct interplay with KIF5B/Miro1/2 not biochemically mapped","Whether the neuronal MT-docking mechanism applies identically in tumor cells unclear"]},{"year":2017,"claim":"Defined the regulated release arm of the mechanism: stressed mitochondria shed SNPH onto retrograde late-endosomal cargos for clearance independent of canonical mitophagy.","evidence":"Immuno-EM, super-resolution and live imaging, Parkin/Drp1/autophagy epistasis, snph KO neurons","pmids":["28472658"],"confidence":"High","gaps":["Molecular trigger of bulk SNPH release not identified","Fate of released SNPH cargo in the soma unresolved"]},{"year":2017,"claim":"Revealed a tumor-mitochondrial SNPH isoform with a metabolic role, buffering oxidative stress and sustaining complex II bioenergetics while hypoxia lowers SNPH to favor invasion.","evidence":"Isoform characterization, KD/KO, xenograft and syngeneic tumor models, metabolic assays","pmids":["28891816"],"confidence":"High","gaps":["Mechanism of redox buffering not defined","How splice isoform targeting is controlled unknown"]},{"year":2018,"claim":"Identified post-translational control of docking, showing CHIP/STUB1 ubiquitinates SNPH on Lys111/Lys153 non-degradatively to lock it onto tubulin and restrain motility.","evidence":"Proteomics, site-directed mutagenesis (K111R/K153R), in vitro ubiquitination, motility imaging, in vivo metastasis","pmids":["29898993"],"confidence":"High","gaps":["Deubiquitinase reversing the modification unknown","Signals controlling CHIP activity on SNPH not defined"]},{"year":2019,"claim":"Established that compartmental restriction matters: SNPH is normally axon-excluded, and forced dendritic intrusion sensitizes neurons to NMDAR-driven excitotoxicity and blocks somal mitophagy.","evidence":"Viral transduction in SNPH-KO mice, electrophysiology, calcium and live-cell imaging, Purkinje viability assays","pmids":["31618636"],"confidence":"High","gaps":["Machinery enforcing normal axonal targeting not identified","How intrusion impairs calcium uptake mechanistically unclear"]},{"year":2022,"claim":"Placed SNPH downstream of inflammatory/excitatory signaling, showing IL-1β and NMDAR act synergistically to drive dendritic SNPH intrusion as the effector of excitotoxicity.","evidence":"SNPH-/- and WT hippocampal cultures, MK-801 and tyrosine inhibitors, immunofluorescence, viability assays","pmids":["35970564"],"confidence":"Medium","gaps":["Molecular link transducing IL-1β/NMDAR signals to SNPH relocation unknown","In vivo relevance not demonstrated in this study"]},{"year":2023,"claim":"Extended the trafficking-suppressor role to immune cells, showing SNPH restrains neutrophil/PMN-MDSC mitochondrial motility, metabolism and migration to limit metastasis.","evidence":"SNPH-KO mice, mitochondrial imaging in PMN, metabolic flux and migration assays, in vivo metastasis","pmids":["36548516"],"confidence":"Medium","gaps":["Whether the same MT-docking biochemistry operates in PMN not shown","Link between adenosine generation and migration not fully dissected"]},{"year":2023,"claim":"Identified a glial role, showing SNPH localizes to oligodendrocytes and myelin and is redistributed by netrin-1 to retain mitochondria at adhesion sites.","evidence":"Immunofluorescence, live imaging, netrin-1 bead adhesion assay, in vivo myelin fractionation","pmids":["37272718"],"confidence":"Medium","gaps":["Functional consequence of glial mitochondrial retention for myelination not established","Receptor coupling netrin-1 to SNPH redistribution unknown"]},{"year":2024,"claim":"Demonstrated transcriptional/microRNA control of SNPH relevant to repair, showing miR-146b suppresses the snphb ortholog to enhance axonal mitochondrial transport and regeneration.","evidence":"CRISPR/Cas9, single-cell electroporation, in vivo imaging and escape-response assay in zebrafish","pmids":["39645618"],"confidence":"Medium","gaps":["Conservation of the miR-146b axis in mammals not shown","Direct miR-146b–snphb interaction context dependence unclear"]},{"year":2026,"claim":"Defined a hypoxia-driven regulatory axis in cancer, showing HIF-1α/miR-130a-3p suppresses SNPH to raise ROS and activate an AKT/cdc42/PAK1/Cofilin filopodia program promoting invasion.","evidence":"Luciferase reporter, ROS and pathway assays, filopodia imaging, in vivo xenograft metastasis","pmids":["41888092"],"confidence":"Medium","gaps":["Direct connection between SNPH loss and ROS production mechanistically incomplete","Relative contribution of trafficking vs metabolic effects not separated"]},{"year":2026,"claim":"Identified upstream kinase signaling controlling SNPH-dependent mitochondrial recruitment, with PAK5 interacting with SNPH downstream of Akt to drive mitochondrial recruitment to injured axons after stroke.","evidence":"Co-IP, molecular docking, surface plasmon resonance, RNA-seq, MCAO mouse model with Akt inhibition","pmids":["42134501"],"confidence":"Medium","gaps":["PAK5–SNPH interaction shown by Co-IP/docking without mapped phosphosite","Whether PAK5 modifies SNPH directly unresolved"]},{"year":null,"claim":"How SNPH is dynamically switched between anchored and released states and how its strict axonal targeting is enforced and broken under disease remain unresolved at the molecular level.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No defined trigger linking signaling inputs (tau, IL-1β/NMDAR, PAK5) to SNPH relocation or release","No structural model of the SNPH–microtubule–LC8 complex","Deubiquitinase counterpart to CHIP not identified"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[0,1,8]},{"term_id":"GO:0140313","term_label":"molecular sequestering activity","supporting_discovery_ids":[0,5,7]}],"localization":[{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[0,6,7]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[0,5,8]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[6]}],"pathway":[{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[0,5,6]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[5,7,9]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[7,13]}],"complexes":[],"partners":["DYNLL1","STUB1","KIF5B","RHOT1","RHOT2","PAK5","FUS"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O15079","full_name":"Syntaphilin","aliases":[],"length_aa":494,"mass_kda":53.5,"function":"Inhibits SNARE complex formation by absorbing free STX1A","subcellular_location":"Membrane; Synapse, synaptosome","url":"https://www.uniprot.org/uniprotkb/O15079/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/SNPH","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/SNPH","total_profiled":1310},"omim":[{"mim_id":"611568","title":"SYNTABULIN; SYBU","url":"https://www.omim.org/entry/611568"},{"mim_id":"604942","title":"SYNTAPHILIN; SNPH","url":"https://www.omim.org/entry/604942"},{"mim_id":"602106","title":"POTASSIUM CHANNEL, INWARDLY RECTIFYING, SUBFAMILY J, MEMBER 15; KCNJ15","url":"https://www.omim.org/entry/602106"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Uncertain","locations":[{"location":"Mitochondria","reliability":"Uncertain"},{"location":"Cytokinetic bridge","reliability":"Additional"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":72.8}],"url":"https://www.proteinatlas.org/search/SNPH"},"hgnc":{"alias_symbol":["bA314N13.5"],"prev_symbol":[]},"alphafold":{"accession":"O15079","domains":[{"cath_id":"1.20.5","chopping":"73-184","consensus_level":"medium","plddt":96.0127,"start":73,"end":184}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O15079","model_url":"https://alphafold.ebi.ac.uk/files/AF-O15079-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O15079-F1-predicted_aligned_error_v6.png","plddt_mean":60.44},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=SNPH","jax_strain_url":"https://www.jax.org/strain/search?query=SNPH"},"sequence":{"accession":"O15079","fasta_url":"https://rest.uniprot.org/uniprotkb/O15079.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O15079/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O15079"}},"corpus_meta":[{"pmid":"18191227","id":"PMC_18191227","title":"Docking of axonal mitochondria by syntaphilin controls their mobility and affects short-term facilitation.","date":"2008","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/18191227","citation_count":488,"is_preprint":false},{"pmid":"27268498","id":"PMC_27268498","title":"Facilitation of axon regeneration by enhancing mitochondrial transport and rescuing energy deficits.","date":"2016","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/27268498","citation_count":270,"is_preprint":false},{"pmid":"28472658","id":"PMC_28472658","title":"Releasing Syntaphilin Removes Stressed Mitochondria from Axons Independent of Mitophagy under Pathophysiological Conditions.","date":"2017","source":"Neuron","url":"https://pubmed.ncbi.nlm.nih.gov/28472658","citation_count":160,"is_preprint":false},{"pmid":"27991488","id":"PMC_27991488","title":"A neuronal network of mitochondrial dynamics regulates metastasis.","date":"2016","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/27991488","citation_count":113,"is_preprint":false},{"pmid":"34471251","id":"PMC_34471251","title":"Abnormal levels of mitochondrial proteins in plasma neuronal extracellular vesicles in major depressive disorder.","date":"2021","source":"Molecular psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/34471251","citation_count":90,"is_preprint":false},{"pmid":"19641106","id":"PMC_19641106","title":"Dynein light chain LC8 regulates syntaphilin-mediated mitochondrial docking in axons.","date":"2009","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/19641106","citation_count":65,"is_preprint":false},{"pmid":"21518771","id":"PMC_21518771","title":"Increased axonal mitochondrial mobility does not slow amyotrophic lateral sclerosis (ALS)-like disease in mutant SOD1 mice.","date":"2011","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/21518771","citation_count":51,"is_preprint":false},{"pmid":"29898993","id":"PMC_29898993","title":"Syntaphilin Ubiquitination Regulates Mitochondrial Dynamics and Tumor Cell Movements.","date":"2018","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/29898993","citation_count":48,"is_preprint":false},{"pmid":"24928582","id":"PMC_24928582","title":"Differentiation state-specific mitochondrial dynamic regulatory networks are revealed by global transcriptional analysis of the developing chicken lens.","date":"2014","source":"G3 (Bethesda, Md.)","url":"https://pubmed.ncbi.nlm.nih.gov/24928582","citation_count":44,"is_preprint":false},{"pmid":"28891816","id":"PMC_28891816","title":"Syntaphilin controls a mitochondrial rheostat for proliferation-motility decisions in cancer.","date":"2017","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/28891816","citation_count":42,"is_preprint":false},{"pmid":"18760840","id":"PMC_18760840","title":"Study of the cytotoxic activity of di and triphenyltin(IV) carboxylate complexes.","date":"2008","source":"Journal of inorganic biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/18760840","citation_count":42,"is_preprint":false},{"pmid":"18439296","id":"PMC_18439296","title":"Cerebrospinal fluid markers before and after shunting in patients with secondary and idiopathic normal pressure hydrocephalus.","date":"2008","source":"Cerebrospinal fluid research","url":"https://pubmed.ncbi.nlm.nih.gov/18439296","citation_count":39,"is_preprint":false},{"pmid":"25834054","id":"PMC_25834054","title":"Deletion of mitochondrial anchoring protects dysmyelinating shiverer: implications for progressive MS.","date":"2015","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/25834054","citation_count":32,"is_preprint":false},{"pmid":"21072389","id":"PMC_21072389","title":"Synthesis and biological applications of ionic triphenyltin(IV) chloride carboxylate complexes with exceptionally high cytotoxicity.","date":"2010","source":"Metallomics : integrated biometal science","url":"https://pubmed.ncbi.nlm.nih.gov/21072389","citation_count":32,"is_preprint":false},{"pmid":"28812939","id":"PMC_28812939","title":"Removing dysfunctional mitochondria from axons independent of mitophagy under pathophysiological conditions.","date":"2017","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/28812939","citation_count":28,"is_preprint":false},{"pmid":"34193962","id":"PMC_34193962","title":"Identification of a novel interaction of FUS and syntaphilin may explain synaptic and mitochondrial abnormalities caused by ALS mutations.","date":"2021","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/34193962","citation_count":24,"is_preprint":false},{"pmid":"36548516","id":"PMC_36548516","title":"Syntaphilin Regulates Neutrophil Migration in Cancer.","date":"2023","source":"Cancer immunology research","url":"https://pubmed.ncbi.nlm.nih.gov/36548516","citation_count":19,"is_preprint":false},{"pmid":"38806484","id":"PMC_38806484","title":"The amyloid precursor protein and its derived fragments concomitantly contribute to the alterations of mitochondrial transport machinery in Alzheimer's disease.","date":"2024","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/38806484","citation_count":19,"is_preprint":false},{"pmid":"21194618","id":"PMC_21194618","title":"The triphenyltin(VI) complexes of NSAIDs and derivatives. Synthesis, crystal structure and antiproliferative activity. Potent anticancer agents.","date":"2010","source":"Journal of inorganic biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/21194618","citation_count":18,"is_preprint":false},{"pmid":"31095452","id":"PMC_31095452","title":"Come and eat: mitochondrial transport guides mitophagy in ischemic neuronal axons.","date":"2019","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/31095452","citation_count":17,"is_preprint":false},{"pmid":"33762923","id":"PMC_33762923","title":"Dl-3-n-Butylphthalide Alleviates Demyelination and Improves Cognitive Function by Promoting Mitochondrial Dynamics in White Matter Lesions.","date":"2021","source":"Frontiers in aging neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/33762923","citation_count":17,"is_preprint":false},{"pmid":"31618636","id":"PMC_31618636","title":"Inappropriate Intrusion of an Axonal Mitochondrial Anchor into Dendrites Causes Neurodegeneration.","date":"2019","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/31618636","citation_count":16,"is_preprint":false},{"pmid":"21426264","id":"PMC_21426264","title":"Candidate pathway association study in cocaine dependence: the control of neurotransmitter release.","date":"2011","source":"The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/21426264","citation_count":13,"is_preprint":false},{"pmid":"35769812","id":"PMC_35769812","title":"Perisciatic Nerve Dexmedetomidine Alleviates Spinal Oxidative Stress and Improves Peripheral Mitochondrial Dynamic Equilibrium in a Neuropathic Pain Mouse Model in an AMPK-Dependent Manner.","date":"2022","source":"Disease markers","url":"https://pubmed.ncbi.nlm.nih.gov/35769812","citation_count":13,"is_preprint":false},{"pmid":"37272718","id":"PMC_37272718","title":"Expression and subcellular localization of mitochondrial docking protein, syntaphilin, in oligodendrocytes and CNS myelin sheath.","date":"2023","source":"Glia","url":"https://pubmed.ncbi.nlm.nih.gov/37272718","citation_count":12,"is_preprint":false},{"pmid":"35929256","id":"PMC_35929256","title":"Tin-loaded mesoporous silica nanoparticles: Antineoplastic properties and genotoxicity assessment.","date":"2022","source":"Biomaterials advances","url":"https://pubmed.ncbi.nlm.nih.gov/35929256","citation_count":12,"is_preprint":false},{"pmid":"11666732","id":"PMC_11666732","title":"Bonding Properties of a Novel Inorganometallic Complex, Ru(SnPh(3))(2)(CO)(2)(iPr-DAB) (iPr-DAB = N,N'-Diisopropyl-1,4-diaza-1,3-butadiene), and its Stable Radical-Anion, Studied by UV-Vis, IR, and EPR Spectroscopy, (Spectro-) Electrochemistry, and Density Functional Calculations.","date":"1996","source":"Inorganic chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/11666732","citation_count":11,"is_preprint":false},{"pmid":"35970564","id":"PMC_35970564","title":"Tripartite Crosstalk between Cytokine IL-1β, NMDA-R and Misplaced Mitochondrial Anchor in Neuronal Dendrites Is a Novel Pathway for Neurodegeneration in Inflammatory Diseases.","date":"2022","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/35970564","citation_count":9,"is_preprint":false},{"pmid":"37192718","id":"PMC_37192718","title":"Insight on the hub gene associated signatures and potential therapeutic agents in epilepsy and glioma.","date":"2023","source":"Brain research bulletin","url":"https://pubmed.ncbi.nlm.nih.gov/37192718","citation_count":9,"is_preprint":false},{"pmid":"33577962","id":"PMC_33577962","title":"Syntaphilin downregulation facilitates radioresistance via mediating mitochondria distribution in esophageal squamous cell carcinoma.","date":"2021","source":"Free radical biology & medicine","url":"https://pubmed.ncbi.nlm.nih.gov/33577962","citation_count":8,"is_preprint":false},{"pmid":"31079810","id":"PMC_31079810","title":"Syntaphilin Is a Novel Biphasic Biomarker of Aggressive Prostate Cancer and a Metastasis Predictor.","date":"2019","source":"The American journal of pathology","url":"https://pubmed.ncbi.nlm.nih.gov/31079810","citation_count":7,"is_preprint":false},{"pmid":"26960420","id":"PMC_26960420","title":"Dramatic mechanistic switch in Sn/Au(I) group exchanges: transmetalation vs. oxidative addition.","date":"2016","source":"Chemical communications (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/26960420","citation_count":7,"is_preprint":false},{"pmid":"37458986","id":"PMC_37458986","title":"Syntaphilin Inactivation Can Enhance Axonal Mitochondrial Transport to Improve Spinal Cord Injury.","date":"2023","source":"Molecular neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/37458986","citation_count":6,"is_preprint":false},{"pmid":"39856330","id":"PMC_39856330","title":"S100A8/A9 innate immune signaling as a distinct mechanism driving progression of smoking-related breast cancers.","date":"2025","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/39856330","citation_count":5,"is_preprint":false},{"pmid":"37187340","id":"PMC_37187340","title":"Roles of syntaphilin and armadillo repeat-containing X-linked protein 1 in brain injury after experimental intracerebral hemorrhage.","date":"2023","source":"Neuroscience letters","url":"https://pubmed.ncbi.nlm.nih.gov/37187340","citation_count":4,"is_preprint":false},{"pmid":"21447851","id":"PMC_21447851","title":"[Management of secondary normal pressure hydrocephalus and assessment of cortical reorganization using fMRI].","date":"2011","source":"No shinkei geka. Neurological surgery","url":"https://pubmed.ncbi.nlm.nih.gov/21447851","citation_count":3,"is_preprint":false},{"pmid":"20689713","id":"PMC_20689713","title":"Diorganotin complexes of a thiosemicarbazone, synthesis: properties, x-ray crystal structure, and antiproliferative activity of diorganotin complexes.","date":"2010","source":"Bioinorganic chemistry and applications","url":"https://pubmed.ncbi.nlm.nih.gov/20689713","citation_count":3,"is_preprint":false},{"pmid":"29291491","id":"PMC_29291491","title":"Triphenyltin derivatives of sulfanylcarboxylic esters.","date":"2017","source":"Journal of inorganic biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/29291491","citation_count":2,"is_preprint":false},{"pmid":"38223707","id":"PMC_38223707","title":"Application of LRG mechanism in normal pressure hydrocephalus.","date":"2023","source":"Heliyon","url":"https://pubmed.ncbi.nlm.nih.gov/38223707","citation_count":2,"is_preprint":false},{"pmid":"38738460","id":"PMC_38738460","title":"Short report: Twins with 20p13 duplication. Case report and comprehensive literature review.","date":"2024","source":"Molecular genetics & genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/38738460","citation_count":2,"is_preprint":false},{"pmid":"36838847","id":"PMC_36838847","title":"Tin(II) and Tin(IV) Complexes Incorporating the Oxygen Tripodal Ligands [(η5-C5R5)Co{P(OEt)2O}3]-, (R = H, Me; Et = -C2H5) as Potent Inflammatory Mediator Inhibitors: Cytotoxic Properties and Biological Activities against the Platelet-Activating Factor (PAF) and Thrombin.","date":"2023","source":"Molecules (Basel, Switzerland)","url":"https://pubmed.ncbi.nlm.nih.gov/36838847","citation_count":2,"is_preprint":false},{"pmid":"39645618","id":"PMC_39645618","title":"Reprogramming miR-146b-snphb Signaling Activates Axonal Mitochondrial Transport in the Zebrafish M-cell and Facilitates Axon Regeneration After Injury.","date":"2024","source":"Neuroscience bulletin","url":"https://pubmed.ncbi.nlm.nih.gov/39645618","citation_count":2,"is_preprint":false},{"pmid":"29850045","id":"PMC_29850045","title":"Monoclinic polymorph of chlorido-(dimethyl sulfoxide-κO)tri-phenyl-tin(IV).","date":"2018","source":"Acta crystallographica. Section E, Crystallographic communications","url":"https://pubmed.ncbi.nlm.nih.gov/29850045","citation_count":2,"is_preprint":false},{"pmid":"41888092","id":"PMC_41888092","title":"HIF-1α suppresses SNPH expression to facilitate liver metastasis of colorectal cancer through regulating mitochondrial dynamics and filopodia formation.","date":"2026","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/41888092","citation_count":0,"is_preprint":false},{"pmid":"31563097","id":"PMC_31563097","title":"Antitumor effects of the electromagnetic resonant frequencies derived from the 1H NMR spectrum of Ph3Sn(Mercaptonicotinic)SnPh3 complex.","date":"2019","source":"Medical hypotheses","url":"https://pubmed.ncbi.nlm.nih.gov/31563097","citation_count":0,"is_preprint":false},{"pmid":"42134501","id":"PMC_42134501","title":"Buyang Huanwu decoction promotes neurological recovery after ischemic stroke by activating the Akt/PAK5/SNPH axis to enhance mitochondrial recruitment and axonal remodeling.","date":"2026","source":"Journal of ethnopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/42134501","citation_count":0,"is_preprint":false},{"pmid":"38628523","id":"PMC_38628523","title":"Secondary normal pressure hydrocephalus following pituitary apoplexy: A case report.","date":"2024","source":"Surgical neurology international","url":"https://pubmed.ncbi.nlm.nih.gov/38628523","citation_count":0,"is_preprint":false},{"pmid":"41839425","id":"PMC_41839425","title":"Bisphenol-A impairs hippocampal neurogenesis by disrupting Kinesin-1-dependent mitochondrial trafficking.","date":"2026","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/41839425","citation_count":0,"is_preprint":false},{"pmid":"40076501","id":"PMC_40076501","title":"Identification of Thyroid Genes Whose Expression Is Altered by Neonatal Irradiation in Rats.","date":"2025","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/40076501","citation_count":0,"is_preprint":false},{"pmid":"12630333","id":"PMC_12630333","title":"Differential effect of Bacillus firmus on immune response and enterocyte brush-border enzyme levels in BALB/c and B10.BR mice.","date":"2002","source":"Folia microbiologica","url":"https://pubmed.ncbi.nlm.nih.gov/12630333","citation_count":0,"is_preprint":false},{"pmid":"7461863","id":"PMC_7461863","title":"The synthesis of poly-L-lysine-succinyl-NADP: an analogue for NADP/H.","date":"1980","source":"The International journal of artificial organs","url":"https://pubmed.ncbi.nlm.nih.gov/7461863","citation_count":0,"is_preprint":false},{"pmid":"41445618","id":"PMC_41445618","title":"Multivariate genome-wide association study of suicidal behaviors in >1.7 million individuals of diverse population descents.","date":"2025","source":"medRxiv : the preprint server for health sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41445618","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.09.05.674541","title":"A Novel Mechanism for Tauopathy in Progressive Multiple Sclerosis: Excitotoxic Misplacement of a Mitochondrial Anchor into Dendrites Driven by Tau-hyperphosphorylation","date":"2025-09-08","source":"bioRxiv","url":"https://doi.org/10.1101/2025.09.05.674541","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":29200,"output_tokens":4761,"usd":0.079507,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":13129,"output_tokens":5056,"usd":0.096022,"stage2_stop_reason":"end_turn"},"total_usd":0.175529,"stage1_batch_id":"msgbatch_013LWZZT6MWaqB9qyTSeQBmU","stage2_batch_id":"msgbatch_0194ZzQaTGNpruoNJBbEMbt3","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2008,\n      \"finding\": \"SNPH acts as an axonal mitochondrial docking receptor by interacting with microtubules. Axonal mitochondria containing exogenous or endogenous SNPH lose mobility; deletion of the snph gene in mice results in a substantially higher proportion of mobile axonal mitochondria and reduced axonal mitochondrial density, with enhanced short-term synaptic facilitation rescued by reintroduction of snph.\",\n      \"method\": \"snph knockout mouse, time-lapse live imaging, genetic rescue, overexpression in neurons\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO with defined cellular phenotype, genetic rescue, multiple orthogonal methods, replicated across labs\",\n      \"pmids\": [\"18191227\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Dynein light chain LC8 binds to a specific seven-residue motif on SNPH, enhancing the SNPH–microtubule docking interaction. LC8 recruits to axonal mitochondria via SNPH; deletion of the LC8-binding motif impairs SNPH-mediated mitochondrial immobilization. LC8 stabilizes an alpha-helical coiled-coil within the SNPH microtubule-binding domain against thermal unfolding. LC8 reduces mitochondrial mobility in snph(+/+) but not snph(-/-) neurons, confirming dependence on SNPH.\",\n      \"method\": \"Proteomic/biochemical pulldown, mutagenesis, time-lapse live imaging in snph WT and KO neurons, circular dichroism spectroscopy\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — mutagenesis mapping of binding motif, biophysical assay, epistasis via KO neurons, multiple orthogonal methods in single lab\",\n      \"pmids\": [\"19641106\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Genetic deletion of snph in SOD1(G93A) ALS mice doubles the proportion of mobile axonal mitochondria but does not alter disease onset, motor function decline, motor neuron loss, gliosis, or lifespan, indicating that reduced mitochondrial transport seen in SOD1(G93A) mice is not a primary driver of rapid-onset fALS pathology.\",\n      \"method\": \"Genetic cross of SOD1(G93A) and snph(-/-) mice, time-lapse imaging, behavioral assays, neuropathology\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean double-mutant genetic epistasis in vivo with defined phenotypic readouts, single lab but rigorous\",\n      \"pmids\": [\"21518771\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Deletion of SNPH in Shiverer dysmyelinating mice prolongs survival, reduces cerebellar damage, suppresses oxidative stress, and improves mitochondrial health, demonstrating a context-dependent harmful role of mitochondrial anchoring in demyelination. In contrast, SNPH deletion does not benefit EAE (inflammatory MS model), indicating specificity to the progressive/degenerative phase.\",\n      \"method\": \"Genetic deletion (SNPH KO) in Shiverer mice and EAE model, survival analysis, neuropathology, oxidative stress assays\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KO in two disease models with defined phenotypic readouts demonstrating context-dependent function\",\n      \"pmids\": [\"25834054\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"SNPH levels increase in mature neurons, causing mitochondrial anchoring that produces local ATP depletion and energy deficits in injured axons after axotomy. Genetic deletion of snph enhances mitochondrial transport, replenishes healthy mitochondria in injured axons, rescues energy deficits, and accelerates axon regeneration in vivo after sciatic nerve crush.\",\n      \"method\": \"snph KO mice, in vivo sciatic nerve crush, live imaging, ATP measurements, genetic manipulation\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — KO with defined metabolic and regenerative phenotype, in vivo validation, multiple orthogonal methods\",\n      \"pmids\": [\"27268498\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"In tumor cells, SNPH (via a network including KIF5B and Miro1/2) anchors mitochondria to the cortical cytoskeleton and thereby suppresses mitochondrial trafficking, cell motility, chemotaxis, and metastasis in vivo. SNPH shRNA knockdown increases mitochondrial speed and distance travelled, repositions mitochondria to the cortical cytoskeleton, and promotes metastasis.\",\n      \"method\": \"Genome-wide shRNA screen, time-lapse mitochondrial imaging, chemotaxis assays, in vivo metastasis models\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional screen plus KD with defined cellular and in vivo phenotypes, multiple orthogonal assays\",\n      \"pmids\": [\"27991488\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Stressed mitochondria are removed from axons through bulk release of SNPH from stressed mitochondria onto a new class of mitochondria-derived cargos that share retrograde transport on late endosomes toward the soma, independently of Parkin, Drp1, and autophagy. This SNPH-release mechanism is activated during early disease stages in ALS- and AD-linked neurons.\",\n      \"method\": \"Immuno-electron microscopy, super-resolution imaging, live imaging, genetic manipulation (Parkin/Drp1/autophagy KO/KD), snph KO neurons\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — immuno-EM and super-resolution imaging, epistasis with Parkin/Drp1/autophagy, multiple orthogonal methods in single lab\",\n      \"pmids\": [\"28472658\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Mitochondrial SNPH (alternatively spliced isoform targeted to tumor cell mitochondria) buffers oxidative stress and maintains complex II-dependent bioenergetics, sustaining local tumor cell proliferation while restricting mitochondrial redistribution to the cortical cytoskeleton and limiting tumor cell motility. Hypoxia acutely lowers SNPH levels, shifting cells from proliferative to invasive phenotype.\",\n      \"method\": \"Isoform characterization, SNPH KD/KO, xenograft and syngeneic tumor models in vivo, metabolic assays, live mitochondrial imaging\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KD/KO with defined metabolic and in vivo metastatic phenotypes, isoform characterization, multiple orthogonal methods\",\n      \"pmids\": [\"28891816\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"SNPH is ubiquitinated by the E3 ligase CHIP (STUB1) on Lys111 and Lys153 within its microtubule-binding domain. This ubiquitination does not cause protein degradation but anchors SNPH on tubulin to inhibit mitochondrial motility and dynamics. Ubiquitination-defective SNPH mutants (K111R or K153R) increase mitochondrial speed and distance, reposition mitochondria to the cortical cytoskeleton, increase Drp1 recruitment, and enhance tumor chemotaxis, invasion, and metastasis in vivo.\",\n      \"method\": \"Global proteomics screen, site-directed mutagenesis (K111R, K153R), in vitro ubiquitination assay, mitochondrial motility imaging, in vivo metastasis models\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — mutagenesis of ubiquitination sites, proteomics identification of E3 ligase, in vivo validation, multiple orthogonal methods\",\n      \"pmids\": [\"29898993\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"SNPH is normally excluded from dendrites and targeted to axons. In Shiverer mice (progressive MS model), SNPH is misplaced into dendrites of Purkinje cells. Reconstituting dendritic SNPH intrusion in SNPH-KO mice by viral transduction sensitizes Purkinje cells to excitotoxicity upon climbing fiber stimulation. In vitro, overexpression of SNPH in dendrites causes excitotoxicity via NMDA receptor activation, reduces mitochondrial calcium uptake, and blocks somal mitophagy.\",\n      \"method\": \"In vivo viral transduction, SNPH-KO mice, live-cell imaging, electrophysiology, calcium imaging, Purkinje cell viability assays\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — viral rescue in KO, in vitro and in vivo experiments, multiple defined mechanistic readouts\",\n      \"pmids\": [\"31618636\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"FUS co-localizes with the mitochondrial tethering protein SNPH in neurons. Mutations in FUS alter this co-localization and are associated with changes in mitochondrial numbers and transport in primary neurons and zebrafish models.\",\n      \"method\": \"Co-localization (immunofluorescence), primary neuron and zebrafish overexpression models, mitochondrial transport assays\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single-lab co-localization without reciprocal Co-IP or direct binding assay; indirect functional link\",\n      \"pmids\": [\"34193962\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"IL-1β and NMDA each individually trigger dendritic SNPH intrusion in hippocampal neurons. They interact synergistically: blocking NMDAR with MK-801 prevents IL-1β from triggering dendritic SNPH intrusion, and decoupling IL-1β/NMDAR interaction with tyrosine inhibitors prevents either stimulus from causing intrusion. Neuronal toxicity caused by IL-1β or NMDA is strongly ameliorated in SNPH-/- neurons, placing SNPH downstream of IL-1β/NMDAR crosstalk as the effector of excitotoxicity.\",\n      \"method\": \"Primary hippocampal cultures from SNPH-/- and WT mice, pharmacological antagonists (MK-801, tyrosine inhibitors), immunofluorescence, cell viability assays\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic (KO) and pharmacological epistasis with two defined signaling inputs, single lab\",\n      \"pmids\": [\"35970564\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"SNPH is expressed in oligodendrocyte precursor cells and mature oligodendrocytes and is present in the myelin sheath in vivo. Netrin-1 increases redistribution of SNPH to oligodendrocyte processes during myelin basic protein-positive membrane expansion, and SNPH clusters at the oligodendrocyte plasma membrane at sites of adhesion with netrin-1-coated beads where mitochondria are retained.\",\n      \"method\": \"Immunofluorescence, live imaging, netrin-1-coated microbead adhesion assay, in vitro oligodendrocyte cultures, in vivo myelin fractionation\",\n      \"journal\": \"Glia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — direct localization experiments with functional consequence (mitochondrial retention), single lab, multiple methods\",\n      \"pmids\": [\"37272718\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"SNPH knockdown in tumor-bearing mice increases the speed and distance travelled by mitochondria in PMN (neutrophils/PMN-MDSCs), elevates rates of oxidative phosphorylation and glycolysis, and increases adenosine generation, resulting in enhanced spontaneous PMN migration and increased metastasis in SNPH-KO mice.\",\n      \"method\": \"SNPH-KO mice, mitochondrial motility imaging in PMN, metabolic flux assays, spontaneous migration assays, in vivo metastasis measurement\",\n      \"journal\": \"Cancer immunology research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KO with defined cellular and in vivo phenotype plus metabolic mechanism, single lab\",\n      \"pmids\": [\"36548516\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"In zebrafish, miR-146b directly suppresses expression of snphb (SNPH ortholog). CRISPR/Cas9 manipulation and single-cell electroporation of the miR-146b-snphb axis enhances axonal mitochondrial trafficking and promotes Mauthner cell axon regeneration and functional recovery after injury.\",\n      \"method\": \"CRISPR/Cas9, single-cell electroporation, in vivo live imaging of mitochondrial transport, escape response behavioral assay in zebrafish\",\n      \"journal\": \"Neuroscience bulletin\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — CRISPR KO plus in vivo imaging, zebrafish ortholog, single lab\",\n      \"pmids\": [\"39645618\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"HIF-1α transcriptionally activates miR-130a-3p, which targets SNPH mRNA to suppress SNPH protein. SNPH downregulation promotes ROS production, activating the AKT/cdc42/PAK1/Cofilin cascade, leading to filopodia formation and increased CRC cell migration and invasion. SNPH overexpression increases mitochondrial fusion and suppresses liver metastasis in vivo.\",\n      \"method\": \"Luciferase reporter assay (HIF-1α→miR-130a-3p→SNPH), ROS measurement, AKT/cdc42/PAK1/Cofilin pathway assays, filopodia imaging, in vivo xenograft metastasis model\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter defines transcriptional axis, pathway assays with defined epistasis, in vivo validation, single lab\",\n      \"pmids\": [\"41888092\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"BHD treatment activates the Akt/PAK5/SNPH signaling cascade, augmenting mitochondrial recruitment to injured axons after ischemic stroke. Co-immunoprecipitation and molecular docking indicate PAK5 interacts with SNPH. Inhibition of Akt abrogates both neuroprotection and SNPH-mediated mitochondrial recruitment.\",\n      \"method\": \"Co-immunoprecipitation, molecular docking, surface plasmon resonance, RNA-seq, Western blot, MCAO mouse model with Akt inhibition\",\n      \"journal\": \"Journal of ethnopharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP and SPR for PAK5-SNPH interaction, pharmacological epistasis in vivo, single lab\",\n      \"pmids\": [\"42134501\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"In primary neuronal cultures, p-Tau kinase inhibitors and Tau-KO both completely abolish dendritic SNPH intrusion (DSI), placing tau hyperphosphorylation upstream of SNPH mislocalization into dendrites in a progressive MS model, and establishing DSI as a downstream effector of tauopathy-driven excitotoxicity.\",\n      \"method\": \"Primary neuronal cultures, pharmacological p-Tau kinase inhibitors, Tau-KO, immunofluorescence for dendritic SNPH localization\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — genetic (KO) and pharmacological epistasis, preprint not yet peer-reviewed, single lab\",\n      \"pmids\": [\"bio_10.1101_2025.09.05.674541\"],\n      \"is_preprint\": true\n    }\n  ],\n  \"current_model\": \"SNPH (syntaphilin) functions as a neuron-specific (and tumor-cell-expressed) mitochondrial docking receptor that anchors mitochondria to microtubules in axons via a direct MT-binding domain; this anchoring is regulated by dynein light chain LC8 (which stabilizes the SNPH–MT interaction through a defined seven-residue binding motif), by non-degradative ubiquitination on Lys111/Lys153 by the E3 ligase CHIP, and by upstream signals including PAK5 and tau phosphorylation. Release of SNPH from stressed mitochondria mobilizes them for retrograde transport and quality control independent of canonical mitophagy pathways. SNPH is normally excluded from dendrites; pathological mislocalization (dendritic SNPH intrusion) driven by IL-1β/NMDAR signaling and tau hyperphosphorylation causes excitotoxic mitochondrial immobilization and neurodegeneration. In cancer cells, SNPH suppresses mitochondrial trafficking to the cortical cytoskeleton, limiting bioenergetics of cell motility and thereby suppressing metastasis, while in neutrophils SNPH analogously restrains migration.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"SNPH (syntaphilin) is a mitochondrial docking receptor that immobilizes mitochondria by tethering them to microtubules, controlling the balance between stationary and motile mitochondrial pools in neurons and other cell types [#0]. In axons, SNPH directly engages microtubules; its loss markedly increases the mobile mitochondrial fraction and reduces axonal mitochondrial density, with corresponding effects on synaptic facilitation [#0]. The docking interaction is stabilized by the dynein light chain LC8, which binds a defined seven-residue motif on SNPH and rigidifies an alpha-helical coiled-coil within the microtubule-binding domain [#1], and by non-degradative ubiquitination on Lys111/Lys153 within that same domain by the E3 ligase CHIP/STUB1, which locks SNPH onto tubulin to restrain motility and dynamics [#8]. Anchoring is reversible and stress-responsive: stressed axonal mitochondria undergo bulk release of SNPH onto retrograde late-endosomal cargos for clearance toward the soma, independent of Parkin, Drp1, and autophagy [#6]. The physiological consequences of anchoring are strongly context-dependent — SNPH-mediated immobilization causes local ATP depletion that impairs axon regeneration after injury [#4], and is harmful in dysmyelinating disease [#3], yet does not drive rapid-onset SOD1 ALS pathology [#2]. SNPH is normally axon-restricted; pathological intrusion into dendrites driven by IL-1\\u03b2/NMDAR crosstalk [#11] and upstream tau hyperphosphorylation [#17] produces excitotoxic mitochondrial immobilization and neuronal death [#9]. Beyond neurons, SNPH anchors mitochondria away from the cortical cytoskeleton in tumor cells and neutrophils, limiting motility-driving bioenergetics and thereby suppressing metastasis [#5, #7, #13]; a tumor-mitochondrial SNPH isoform additionally buffers oxidative stress and sustains complex II-dependent metabolism [#7], and SNPH is transcriptionally downregulated through hypoxia/HIF-1\\u03b1-driven microRNA axes to promote an invasive phenotype [#15].\",\n  \"teleology\": [\n    {\n      \"year\": 2008,\n      \"claim\": \"Established the founding function of SNPH: whether a dedicated receptor immobilizes axonal mitochondria was unknown, and this work showed SNPH docks mitochondria to microtubules to set the stationary/motile balance.\",\n      \"evidence\": \"snph knockout mice, time-lapse live imaging, genetic rescue and overexpression in neurons\",\n      \"pmids\": [\"18191227\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct structural basis of the SNPH\\u2013microtubule contact not resolved\", \"Signals that engage or release docking not yet defined\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Addressed how the docking interaction is stabilized, showing LC8 binds a discrete seven-residue motif and rigidifies the microtubule-binding coiled-coil to strengthen anchoring.\",\n      \"evidence\": \"Biochemical pulldown, mutagenesis mapping, circular dichroism, time-lapse imaging in snph WT and KO neurons\",\n      \"pmids\": [\"19641106\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How LC8 binding is regulated dynamically unknown\", \"Stoichiometry of the SNPH\\u2013LC8\\u2013microtubule assembly not determined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Tested whether SNPH-dependent transport defects drive ALS pathology; double-mutant epistasis showed restoring mitochondrial mobility does not alter SOD1(G93A) disease course.\",\n      \"evidence\": \"Genetic cross of SOD1(G93A) and snph(-/-) mice with behavioral and neuropathological readouts\",\n      \"pmids\": [\"21518771\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not address SNPH roles in slower-onset neurodegeneration\", \"Does not exclude transport involvement in other ALS models\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Showed mitochondrial anchoring can be actively harmful in a disease-specific manner: SNPH deletion benefits dysmyelinating Shiverer mice but not inflammatory EAE.\",\n      \"evidence\": \"SNPH KO in Shiverer and EAE models, survival, neuropathology and oxidative stress assays\",\n      \"pmids\": [\"25834054\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism distinguishing degenerative vs inflammatory contexts unresolved\", \"Cell type responsible for the benefit not pinpointed\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Connected anchoring to axonal energy supply and regeneration, showing rising SNPH in mature neurons immobilizes mitochondria, causing ATP deficits that limit axon repair.\",\n      \"evidence\": \"snph KO mice, in vivo sciatic nerve crush, live imaging, ATP measurements\",\n      \"pmids\": [\"27268498\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Trigger for the developmental rise in SNPH unknown\", \"Translation to CNS regeneration not established\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Extended SNPH function beyond neurons, identifying it in a screen as a suppressor of tumor cell mitochondrial trafficking, motility and metastasis.\",\n      \"evidence\": \"Genome-wide shRNA screen, mitochondrial imaging, chemotaxis and in vivo metastasis models\",\n      \"pmids\": [\"27991488\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct interplay with KIF5B/Miro1/2 not biochemically mapped\", \"Whether the neuronal MT-docking mechanism applies identically in tumor cells unclear\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Defined the regulated release arm of the mechanism: stressed mitochondria shed SNPH onto retrograde late-endosomal cargos for clearance independent of canonical mitophagy.\",\n      \"evidence\": \"Immuno-EM, super-resolution and live imaging, Parkin/Drp1/autophagy epistasis, snph KO neurons\",\n      \"pmids\": [\"28472658\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular trigger of bulk SNPH release not identified\", \"Fate of released SNPH cargo in the soma unresolved\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Revealed a tumor-mitochondrial SNPH isoform with a metabolic role, buffering oxidative stress and sustaining complex II bioenergetics while hypoxia lowers SNPH to favor invasion.\",\n      \"evidence\": \"Isoform characterization, KD/KO, xenograft and syngeneic tumor models, metabolic assays\",\n      \"pmids\": [\"28891816\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of redox buffering not defined\", \"How splice isoform targeting is controlled unknown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identified post-translational control of docking, showing CHIP/STUB1 ubiquitinates SNPH on Lys111/Lys153 non-degradatively to lock it onto tubulin and restrain motility.\",\n      \"evidence\": \"Proteomics, site-directed mutagenesis (K111R/K153R), in vitro ubiquitination, motility imaging, in vivo metastasis\",\n      \"pmids\": [\"29898993\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Deubiquitinase reversing the modification unknown\", \"Signals controlling CHIP activity on SNPH not defined\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Established that compartmental restriction matters: SNPH is normally axon-excluded, and forced dendritic intrusion sensitizes neurons to NMDAR-driven excitotoxicity and blocks somal mitophagy.\",\n      \"evidence\": \"Viral transduction in SNPH-KO mice, electrophysiology, calcium and live-cell imaging, Purkinje viability assays\",\n      \"pmids\": [\"31618636\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Machinery enforcing normal axonal targeting not identified\", \"How intrusion impairs calcium uptake mechanistically unclear\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Placed SNPH downstream of inflammatory/excitatory signaling, showing IL-1\\u03b2 and NMDAR act synergistically to drive dendritic SNPH intrusion as the effector of excitotoxicity.\",\n      \"evidence\": \"SNPH-/- and WT hippocampal cultures, MK-801 and tyrosine inhibitors, immunofluorescence, viability assays\",\n      \"pmids\": [\"35970564\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular link transducing IL-1\\u03b2/NMDAR signals to SNPH relocation unknown\", \"In vivo relevance not demonstrated in this study\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Extended the trafficking-suppressor role to immune cells, showing SNPH restrains neutrophil/PMN-MDSC mitochondrial motility, metabolism and migration to limit metastasis.\",\n      \"evidence\": \"SNPH-KO mice, mitochondrial imaging in PMN, metabolic flux and migration assays, in vivo metastasis\",\n      \"pmids\": [\"36548516\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether the same MT-docking biochemistry operates in PMN not shown\", \"Link between adenosine generation and migration not fully dissected\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified a glial role, showing SNPH localizes to oligodendrocytes and myelin and is redistributed by netrin-1 to retain mitochondria at adhesion sites.\",\n      \"evidence\": \"Immunofluorescence, live imaging, netrin-1 bead adhesion assay, in vivo myelin fractionation\",\n      \"pmids\": [\"37272718\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of glial mitochondrial retention for myelination not established\", \"Receptor coupling netrin-1 to SNPH redistribution unknown\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Demonstrated transcriptional/microRNA control of SNPH relevant to repair, showing miR-146b suppresses the snphb ortholog to enhance axonal mitochondrial transport and regeneration.\",\n      \"evidence\": \"CRISPR/Cas9, single-cell electroporation, in vivo imaging and escape-response assay in zebrafish\",\n      \"pmids\": [\"39645618\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Conservation of the miR-146b axis in mammals not shown\", \"Direct miR-146b\\u2013snphb interaction context dependence unclear\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Defined a hypoxia-driven regulatory axis in cancer, showing HIF-1\\u03b1/miR-130a-3p suppresses SNPH to raise ROS and activate an AKT/cdc42/PAK1/Cofilin filopodia program promoting invasion.\",\n      \"evidence\": \"Luciferase reporter, ROS and pathway assays, filopodia imaging, in vivo xenograft metastasis\",\n      \"pmids\": [\"41888092\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct connection between SNPH loss and ROS production mechanistically incomplete\", \"Relative contribution of trafficking vs metabolic effects not separated\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Identified upstream kinase signaling controlling SNPH-dependent mitochondrial recruitment, with PAK5 interacting with SNPH downstream of Akt to drive mitochondrial recruitment to injured axons after stroke.\",\n      \"evidence\": \"Co-IP, molecular docking, surface plasmon resonance, RNA-seq, MCAO mouse model with Akt inhibition\",\n      \"pmids\": [\"42134501\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"PAK5\\u2013SNPH interaction shown by Co-IP/docking without mapped phosphosite\", \"Whether PAK5 modifies SNPH directly unresolved\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How SNPH is dynamically switched between anchored and released states and how its strict axonal targeting is enforced and broken under disease remain unresolved at the molecular level.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No defined trigger linking signaling inputs (tau, IL-1\\u03b2/NMDAR, PAK5) to SNPH relocation or release\", \"No structural model of the SNPH\\u2013microtubule\\u2013LC8 complex\", \"Deubiquitinase counterpart to CHIP not identified\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [0, 1, 8]},\n      {\"term_id\": \"GO:0140313\", \"supporting_discovery_ids\": [0, 5, 7]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [0, 6, 7]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [0, 5, 8]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [0, 5, 6]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [5, 7, 9]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [7, 13]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"DYNLL1\", \"STUB1\", \"KIF5B\", \"RHOT1\", \"RHOT2\", \"PAK5\", \"FUS\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"faith_supported":7,"faith_total":7,"faith_pct":100.0}}