{"gene":"RHOXF2","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":2011,"finding":"RHOXF2 (PEPP2) was identified as a transcriptional repressor that, when transduced into IL-3-dependent HF6 cells, renders them factor-independent and induces leukemia in mice; knockdown of RHOXF2 inhibited growth of the HGC27 gastric cancer cell line, establishing a direct cancer-promoting (oncogenic) role for RHOXF2.","method":"Retrovirus-mediated expression cloning in Ba/F3 and HF6 cell lines; shRNA knockdown in HGC27 cells; in vivo mouse transplantation assay","journal":"International journal of oncology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with defined cellular phenotype plus gain-of-function in vivo, single lab, two orthogonal approaches","pmids":["21874235"],"is_preprint":false},{"year":2019,"finding":"RHOXF2 (THG-1) promotes tumorsphere growth in esophageal squamous cell carcinoma (ESCC) cells by binding to NRBP1, thereby preventing NRBP1-mediated ubiquitination and degradation of the stemness factor SALL4, which in turn sustains expression of stemness genes NANOG and OCT4. Exogenous SALL4 partially rescued tumorsphere formation in THG-1-deficient cells.","method":"Knockdown (siRNA/shRNA) in TE13 ESCC cells; Co-immunoprecipitation to detect THG-1–NRBP1 and NRBP1–SALL4 interactions; ubiquitination assay; rescue experiments with exogenous SALL4","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — Co-IP, ubiquitination assay, knockdown plus rescue, multiple orthogonal methods, single lab","pmids":["31864704"],"is_preprint":false},{"year":2024,"finding":"RHOXF2 physically interacts with HOXC13 (demonstrated by Co-IP and GST pull-down) and activates the Wnt2/β-catenin signaling pathway in triple-negative breast cancer (TNBC) cells via this interaction; knockdown of RHOXF2 suppressed HOXC13 expression and reduced proliferation, invasion, and migration while inducing G0/G1 arrest and apoptosis, effects reversed by HOXC13 overexpression. H3K27ac histone acetylation was shown by ChIP-PCR and luciferase assay to activate the RHOXF2 promoter.","method":"Co-immunoprecipitation; GST pull-down; siRNA knockdown; HOXC13 overexpression rescue; ChIP-PCR; luciferase reporter assay; xenograft mouse model","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP plus GST pull-down confirming interaction, ChIP plus luciferase for epigenetic regulation, in vivo rescue, single lab","pmids":["38697448"],"is_preprint":false},{"year":2020,"finding":"RHOXF2 is a direct target of miR-3128 in non-small cell lung cancer (NSCLC) cells; luciferase and pull-down assays confirmed miR-3128 binding to RHOXF2, and miR-3128 inhibitor or RHOXF2 overexpression rescued the suppression of proliferation, invasion, and migration caused by LOXL1-AS1 knockdown, placing RHOXF2 downstream of the LOXL1-AS1/miR-3128 axis.","method":"Luciferase reporter assay; RNA pull-down; siRNA knockdown; overexpression rescue; CCK-8 proliferation assay; transwell invasion/migration assay","journal":"OncoTargets and therapy","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, luciferase and pull-down confirm miRNA targeting but mechanistic detail of RHOXF2 action is limited; RHOXF2 is placed in a pathway but its molecular function is not characterized","pmids":["32636639"],"is_preprint":false}],"current_model":"RHOXF2 is an X-linked homeobox transcriptional repressor that promotes cell proliferation and cancer progression by: (1) rendering cytokine-dependent cells factor-independent through an oncogenic transcriptional program; (2) competitively binding NRBP1 to prevent ubiquitin-mediated degradation of stemness factor SALL4, thereby sustaining NANOG/OCT4 expression; and (3) physically interacting with HOXC13 to activate the Wnt2/β-catenin pathway, with its own expression upregulated by H3K27ac histone acetylation at its promoter."},"narrative":{"mechanistic_narrative":"RHOXF2 (also called PEPP2/THG-1) is an X-linked homeobox transcriptional repressor that functions as an oncogenic driver of proliferation and tumor progression across multiple cancer types [PMID:21874235]. Its transforming capacity was established by its ability to render IL-3-dependent hematopoietic cells factor-independent and induce leukemia in mice, while its knockdown impairs gastric cancer cell growth [PMID:21874235]. Mechanistically, RHOXF2 sustains a stemness program in esophageal squamous cell carcinoma by competitively binding NRBP1, thereby blocking NRBP1-mediated ubiquitination and degradation of the stemness factor SALL4 and maintaining NANOG and OCT4 expression [PMID:31864704]. In triple-negative breast cancer it physically interacts with HOXC13 to activate Wnt2/β-catenin signaling, driving proliferation, invasion, and migration and suppressing apoptosis; its own promoter is activated by H3K27ac histone acetylation [PMID:38697448]. Beyond these defined oncogenic interactions, the direct DNA-binding targets of RHOXF2 as a transcription factor have not been characterized in the available corpus.","teleology":[{"year":2011,"claim":"Established that RHOXF2 is an oncogenic transcriptional repressor capable of driving factor-independent growth and tumorigenesis, defining its core cancer-promoting role.","evidence":"Retroviral expression cloning rendering IL-3-dependent HF6 cells factor-independent, in vivo leukemia induction in mice, and shRNA knockdown in HGC27 gastric cancer cells","pmids":["21874235"],"confidence":"Medium","gaps":["No direct transcriptional target genes of the repressor identified","Mechanism by which it confers factor independence not resolved at the molecular level"]},{"year":2019,"claim":"Defined a post-translational mechanism by which RHOXF2 sustains cancer stemness, showing it stabilizes SALL4 by competing with NRBP1-mediated degradation.","evidence":"siRNA/shRNA knockdown in TE13 ESCC cells, Co-IP of THG-1–NRBP1 and NRBP1–SALL4, ubiquitination assay, and SALL4 rescue of tumorsphere formation","pmids":["31864704"],"confidence":"Medium","gaps":["Stoichiometry and binding interface of the RHOXF2–NRBP1 competition not defined","Whether this mechanism operates outside ESCC unknown"]},{"year":2020,"claim":"Placed RHOXF2 as a downstream effector in a regulatory RNA axis, showing it is a direct miR-3128 target whose restoration reverses LOXL1-AS1 knockdown phenotypes.","evidence":"Luciferase reporter and RNA pull-down confirming miR-3128 binding, with overexpression rescue and proliferation/invasion assays in NSCLC cells","pmids":["32636639"],"confidence":"Low","gaps":["Molecular function of RHOXF2 in NSCLC not characterized beyond pathway placement","Single-lab correlative axis without direct mechanistic dissection"]},{"year":2024,"claim":"Identified a transcription-factor partnership through which RHOXF2 activates oncogenic signaling, and revealed epigenetic control of its own expression.","evidence":"Reciprocal Co-IP and GST pull-down of RHOXF2–HOXC13, siRNA knockdown with HOXC13 rescue, ChIP-PCR and luciferase showing H3K27ac at the RHOXF2 promoter, and xenograft model in TNBC","pmids":["38697448"],"confidence":"Medium","gaps":["Direct genomic binding sites of the RHOXF2–HOXC13 complex not mapped","How RHOXF2 mechanistically activates Wnt2 transcription unresolved"]},{"year":null,"claim":"The direct DNA-binding targets and the unifying transcriptional logic of RHOXF2 as a homeobox repressor remain undefined across these distinct cancer contexts.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No genome-wide binding or transcriptomic map of RHOXF2 targets","Unclear whether stemness, Wnt, and factor-independence mechanisms converge on shared targets","No structural data on RHOXF2 protein interactions"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,2]}],"localization":[],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[2]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[0,1,2]}],"complexes":[],"partners":["NRBP1","HOXC13"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9BQY4","full_name":"Rhox homeobox family member 2","aliases":["Paired-like homeobox protein PEPP-2","Testis homeobox gene 1"],"length_aa":288,"mass_kda":31.7,"function":"Transcription factor maybe involved in reproductive processes. Modulates expression of target genes encoding proteins involved in processes relevant to spermatogenesis","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q9BQY4/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/RHOXF2","classification":"Not Classified","n_dependent_lines":5,"n_total_lines":1046,"dependency_fraction":0.004780114722753346},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/RHOXF2","total_profiled":1310},"omim":[{"mim_id":"300447","title":"RHOX HOMEOBOX FAMILY, MEMBER 2; RHOXF2","url":"https://www.omim.org/entry/300447"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Plasma membrane","reliability":"Approved"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in single","driving_tissues":[{"tissue":"testis","ntpm":3.9}],"url":"https://www.proteinatlas.org/search/RHOXF2"},"hgnc":{"alias_symbol":["THG1","PEPP-2","PEPP2","CT107"],"prev_symbol":[]},"alphafold":{"accession":"Q9BQY4","domains":[{"cath_id":"1.10.10.60","chopping":"142-201","consensus_level":"medium","plddt":94.1765,"start":142,"end":201}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9BQY4","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9BQY4-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9BQY4-F1-predicted_aligned_error_v6.png","plddt_mean":62.94},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=RHOXF2","jax_strain_url":"https://www.jax.org/strain/search?query=RHOXF2"},"sequence":{"accession":"Q9BQY4","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9BQY4.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9BQY4/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9BQY4"}},"corpus_meta":[{"pmid":"22456265","id":"PMC_22456265","title":"Doing it in reverse: 3'-to-5' polymerization by the Thg1 superfamily.","date":"2012","source":"RNA (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/22456265","citation_count":52,"is_preprint":false},{"pmid":"21059936","id":"PMC_21059936","title":"tRNA(His) guanylyltransferase (THG1), a unique 3'-5' nucleotidyl transferase, shares unexpected structural homology with canonical 5'-3' DNA polymerases.","date":"2010","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/21059936","citation_count":51,"is_preprint":false},{"pmid":"20591188","id":"PMC_20591188","title":"Presence of a classical RRM-fold palm domain in Thg1-type 3'- 5'nucleic acid polymerases and the origin of the GGDEF and CRISPR polymerase domains.","date":"2010","source":"Biology direct","url":"https://pubmed.ncbi.nlm.nih.gov/20591188","citation_count":33,"is_preprint":false},{"pmid":"21307182","id":"PMC_21307182","title":"A role for tRNA(His) guanylyltransferase (Thg1)-like proteins from Dictyostelium discoideum in mitochondrial 5'-tRNA editing.","date":"2011","source":"RNA (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/21307182","citation_count":33,"is_preprint":false},{"pmid":"26464818","id":"PMC_26464818","title":"Upregulation of RHOXF2 and ODF4 Expression in Breast Cancer Tissues.","date":"2015","source":"Cell journal","url":"https://pubmed.ncbi.nlm.nih.gov/26464818","citation_count":29,"is_preprint":false},{"pmid":"21988730","id":"PMC_21988730","title":"Rapid evolution and copy number variation of primate RHOXF2, an X-linked homeobox gene involved in male reproduction and possibly brain function.","date":"2011","source":"BMC evolutionary biology","url":"https://pubmed.ncbi.nlm.nih.gov/21988730","citation_count":29,"is_preprint":false},{"pmid":"21874235","id":"PMC_21874235","title":"Identification of RHOXF2 (PEPP2) as a cancer-promoting gene by expression cloning.","date":"2011","source":"International journal of oncology","url":"https://pubmed.ncbi.nlm.nih.gov/21874235","citation_count":18,"is_preprint":false},{"pmid":"23844012","id":"PMC_23844012","title":"Structural studies of a bacterial tRNA(HIS) guanylyltransferase (Thg1)-like protein, with nucleotide in the activation and nucleotidyl transfer sites.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23844012","citation_count":18,"is_preprint":false},{"pmid":"27051866","id":"PMC_27051866","title":"Template-dependent nucleotide addition in the reverse (3'-5') direction by Thg1-like protein.","date":"2016","source":"Science advances","url":"https://pubmed.ncbi.nlm.nih.gov/27051866","citation_count":14,"is_preprint":false},{"pmid":"32636639","id":"PMC_32636639","title":"LOXL1-AS1 Contributes to Non-Small Cell Lung Cancer Progression by Regulating miR-3128/RHOXF2 Axis.","date":"2020","source":"OncoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/32636639","citation_count":13,"is_preprint":false},{"pmid":"24548272","id":"PMC_24548272","title":"Saccharomyces cerevisiae Thg1 uses 5'-pyrophosphate removal to control addition of nucleotides to tRNA(His.).","date":"2014","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/24548272","citation_count":12,"is_preprint":false},{"pmid":"31864704","id":"PMC_31864704","title":"THG-1 suppresses SALL4 degradation to induce stemness genes and tumorsphere formation through antagonizing NRBP1 in squamous cell carcinoma cells.","date":"2019","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/31864704","citation_count":11,"is_preprint":false},{"pmid":"25780578","id":"PMC_25780578","title":"RHOXF2 gene, a new candidate gene for spermatogenesis failure.","date":"2014","source":"Basic and clinical andrology","url":"https://pubmed.ncbi.nlm.nih.gov/25780578","citation_count":6,"is_preprint":false},{"pmid":"38697448","id":"PMC_38697448","title":"H3K27ac-induced RHOXF2 activates Wnt2/β-catenin pathway by binding to HOXC13 to aggravate the malignant progression of triple negative breast cancer.","date":"2024","source":"Cellular signalling","url":"https://pubmed.ncbi.nlm.nih.gov/38697448","citation_count":3,"is_preprint":false},{"pmid":"38997129","id":"PMC_38997129","title":"Thg1 family 3'-5' RNA polymerases as tools for targeted RNA synthesis.","date":"2024","source":"RNA (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/38997129","citation_count":2,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.10.12.681950","title":"A comparison of  <i>Dictyostelium discoideum</i>  3’-5’ RNA polymerases reveals a conserved tRNA  <sup>His</sup>  guanylyltransferase residue that plays a dual role in catalysis","date":"2025-10-14","source":"bioRxiv","url":"https://doi.org/10.1101/2025.10.12.681950","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.03.21.644660","title":"Metal ion requirement for catalysis by 3′-5′ RNA polymerases","date":"2025-03-21","source":"bioRxiv","url":"https://doi.org/10.1101/2025.03.21.644660","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.03.28.646047","title":"A minimal CRISPR polymerase produces decoy cyclic nucleotides to detect phage anti-defense proteins","date":"2025-03-30","source":"bioRxiv","url":"https://doi.org/10.1101/2025.03.28.646047","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":12159,"output_tokens":1689,"usd":0.030906,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":7997,"output_tokens":1883,"usd":0.04353,"stage2_stop_reason":"end_turn"},"total_usd":0.074436,"stage1_batch_id":"msgbatch_01CNoDbkChHEkgrJnL7BwtGJ","stage2_batch_id":"msgbatch_016Y4x9E9Wg5VQDANj9quSQD","note":"batch pricing = 50% of standard"},"stage1_raw":"Looking at the papers, I need to distinguish between:\n1. THG1/Thg1 papers - these are about tRNA(His) guanylyltransferase enzymes (yeast, bacterial, Dictyostelium proteins), NOT the human RHOXF2 protein (which has alias \"THG1\" but is a homeobox transcription factor)\n2. RHOXF2 papers - about the human X-linked homeobox gene/protein\n\nThe alias \"THG1\" for RHOXF2 appears in paper [12] (THG-1 in esophageal cancer context as a cancer-related protein binding NRBP1), which is clearly about RHOXF2 as a transcriptional/signaling protein, not the tRNA enzyme.\n\nPapers [1]-[4], [8]-[9], [11], [15]-[18] are all about the tRNA(His) guanylyltransferase enzyme family (fungal/bacterial/archaeal/slime mold) - these are NOT RHOXF2 the homeobox gene. The \"THG1\" alias for RHOXF2 is coincidental with the tRNA enzyme symbol.\n\nPapers clearly about RHOXF2 (homeobox protein): [5], [6], [7], [10], [12], [13], [14]\n\nNow extracting mechanistic findings from these:\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2011,\n      \"finding\": \"RHOXF2 (PEPP2) was identified as a transcriptional repressor that, when transduced into IL-3-dependent HF6 cells, renders them factor-independent and induces leukemia in mice; knockdown of RHOXF2 inhibited growth of the HGC27 gastric cancer cell line, establishing a direct cancer-promoting (oncogenic) role for RHOXF2.\",\n      \"method\": \"Retrovirus-mediated expression cloning in Ba/F3 and HF6 cell lines; shRNA knockdown in HGC27 cells; in vivo mouse transplantation assay\",\n      \"journal\": \"International journal of oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with defined cellular phenotype plus gain-of-function in vivo, single lab, two orthogonal approaches\",\n      \"pmids\": [\"21874235\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RHOXF2 (THG-1) promotes tumorsphere growth in esophageal squamous cell carcinoma (ESCC) cells by binding to NRBP1, thereby preventing NRBP1-mediated ubiquitination and degradation of the stemness factor SALL4, which in turn sustains expression of stemness genes NANOG and OCT4. Exogenous SALL4 partially rescued tumorsphere formation in THG-1-deficient cells.\",\n      \"method\": \"Knockdown (siRNA/shRNA) in TE13 ESCC cells; Co-immunoprecipitation to detect THG-1–NRBP1 and NRBP1–SALL4 interactions; ubiquitination assay; rescue experiments with exogenous SALL4\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — Co-IP, ubiquitination assay, knockdown plus rescue, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"31864704\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RHOXF2 physically interacts with HOXC13 (demonstrated by Co-IP and GST pull-down) and activates the Wnt2/β-catenin signaling pathway in triple-negative breast cancer (TNBC) cells via this interaction; knockdown of RHOXF2 suppressed HOXC13 expression and reduced proliferation, invasion, and migration while inducing G0/G1 arrest and apoptosis, effects reversed by HOXC13 overexpression. H3K27ac histone acetylation was shown by ChIP-PCR and luciferase assay to activate the RHOXF2 promoter.\",\n      \"method\": \"Co-immunoprecipitation; GST pull-down; siRNA knockdown; HOXC13 overexpression rescue; ChIP-PCR; luciferase reporter assay; xenograft mouse model\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP plus GST pull-down confirming interaction, ChIP plus luciferase for epigenetic regulation, in vivo rescue, single lab\",\n      \"pmids\": [\"38697448\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"RHOXF2 is a direct target of miR-3128 in non-small cell lung cancer (NSCLC) cells; luciferase and pull-down assays confirmed miR-3128 binding to RHOXF2, and miR-3128 inhibitor or RHOXF2 overexpression rescued the suppression of proliferation, invasion, and migration caused by LOXL1-AS1 knockdown, placing RHOXF2 downstream of the LOXL1-AS1/miR-3128 axis.\",\n      \"method\": \"Luciferase reporter assay; RNA pull-down; siRNA knockdown; overexpression rescue; CCK-8 proliferation assay; transwell invasion/migration assay\",\n      \"journal\": \"OncoTargets and therapy\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, luciferase and pull-down confirm miRNA targeting but mechanistic detail of RHOXF2 action is limited; RHOXF2 is placed in a pathway but its molecular function is not characterized\",\n      \"pmids\": [\"32636639\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RHOXF2 is an X-linked homeobox transcriptional repressor that promotes cell proliferation and cancer progression by: (1) rendering cytokine-dependent cells factor-independent through an oncogenic transcriptional program; (2) competitively binding NRBP1 to prevent ubiquitin-mediated degradation of stemness factor SALL4, thereby sustaining NANOG/OCT4 expression; and (3) physically interacting with HOXC13 to activate the Wnt2/β-catenin pathway, with its own expression upregulated by H3K27ac histone acetylation at its promoter.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"RHOXF2 (also called PEPP2/THG-1) is an X-linked homeobox transcriptional repressor that functions as an oncogenic driver of proliferation and tumor progression across multiple cancer types [#0]. Its transforming capacity was established by its ability to render IL-3-dependent hematopoietic cells factor-independent and induce leukemia in mice, while its knockdown impairs gastric cancer cell growth [#0]. Mechanistically, RHOXF2 sustains a stemness program in esophageal squamous cell carcinoma by competitively binding NRBP1, thereby blocking NRBP1-mediated ubiquitination and degradation of the stemness factor SALL4 and maintaining NANOG and OCT4 expression [#1]. In triple-negative breast cancer it physically interacts with HOXC13 to activate Wnt2/\\u03b2-catenin signaling, driving proliferation, invasion, and migration and suppressing apoptosis; its own promoter is activated by H3K27ac histone acetylation [#2]. Beyond these defined oncogenic interactions, the direct DNA-binding targets of RHOXF2 as a transcription factor have not been characterized in the available corpus.\",\n  \"teleology\": [\n    {\n      \"year\": 2011,\n      \"claim\": \"Established that RHOXF2 is an oncogenic transcriptional repressor capable of driving factor-independent growth and tumorigenesis, defining its core cancer-promoting role.\",\n      \"evidence\": \"Retroviral expression cloning rendering IL-3-dependent HF6 cells factor-independent, in vivo leukemia induction in mice, and shRNA knockdown in HGC27 gastric cancer cells\",\n      \"pmids\": [\"21874235\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct transcriptional target genes of the repressor identified\", \"Mechanism by which it confers factor independence not resolved at the molecular level\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Defined a post-translational mechanism by which RHOXF2 sustains cancer stemness, showing it stabilizes SALL4 by competing with NRBP1-mediated degradation.\",\n      \"evidence\": \"siRNA/shRNA knockdown in TE13 ESCC cells, Co-IP of THG-1\\u2013NRBP1 and NRBP1\\u2013SALL4, ubiquitination assay, and SALL4 rescue of tumorsphere formation\",\n      \"pmids\": [\"31864704\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Stoichiometry and binding interface of the RHOXF2\\u2013NRBP1 competition not defined\", \"Whether this mechanism operates outside ESCC unknown\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Placed RHOXF2 as a downstream effector in a regulatory RNA axis, showing it is a direct miR-3128 target whose restoration reverses LOXL1-AS1 knockdown phenotypes.\",\n      \"evidence\": \"Luciferase reporter and RNA pull-down confirming miR-3128 binding, with overexpression rescue and proliferation/invasion assays in NSCLC cells\",\n      \"pmids\": [\"32636639\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Molecular function of RHOXF2 in NSCLC not characterized beyond pathway placement\", \"Single-lab correlative axis without direct mechanistic dissection\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified a transcription-factor partnership through which RHOXF2 activates oncogenic signaling, and revealed epigenetic control of its own expression.\",\n      \"evidence\": \"Reciprocal Co-IP and GST pull-down of RHOXF2\\u2013HOXC13, siRNA knockdown with HOXC13 rescue, ChIP-PCR and luciferase showing H3K27ac at the RHOXF2 promoter, and xenograft model in TNBC\",\n      \"pmids\": [\"38697448\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct genomic binding sites of the RHOXF2\\u2013HOXC13 complex not mapped\", \"How RHOXF2 mechanistically activates Wnt2 transcription unresolved\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The direct DNA-binding targets and the unifying transcriptional logic of RHOXF2 as a homeobox repressor remain undefined across these distinct cancer contexts.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No genome-wide binding or transcriptomic map of RHOXF2 targets\", \"Unclear whether stemness, Wnt, and factor-independence mechanisms converge on shared targets\", \"No structural data on RHOXF2 protein interactions\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 2]}\n    ],\n    \"localization\": [],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [0, 1, 2]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"NRBP1\", \"HOXC13\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":4,"faith_total":4,"faith_pct":100.0}}