{"id":"896606c0-8c53-50bb-91c9-3bea6d58688a","stable_key":"335be270-ea4a-5c8e-ad04-964fd22a439e:vanadium-cardiac-depolarization","predicate":"induces","statement":"Decavanadate and mixed metavanadate solutions depolarized mitochondria in neonatal rat cardiomyocytes within six hours; half-maximal depolarization occurred near 6.5 micromolar total vanadium.","claim_class":"mechanistic","status":"source_derived_draft","evidence_grade":"ungraded","direction":"context_dependent","is_public":true,"mechanism_event_id":"9a1e7aa5-ecb5-53cd-8c88-2741a19195b2","mechanism_event_label":"Mitochondrial electrical failure preceded later cell death.","subject":{"id":"ab633bfc-d259-5deb-ac81-a3383f79d4bf","slug":"decavanadate","display_name":"Decavanadate(V)","entity_type_key":"chemical_species"},"object":{"id":"7de13713-9286-548d-8192-102dfd7ef836","slug":"rat-cardiomyocyte-vanadate-depolarization","display_name":"Mitochondrial depolarization in vanadate-exposed neonatal rat cardiomyocytes","entity_type_key":"cellular_process"},"evidence_count":1,"mechanism_event":{"id":"9a1e7aa5-ecb5-53cd-8c88-2741a19195b2","stable_key":"335be270-ea4a-5c8e-ad04-964fd22a439e:vanadium-cardiac-depolarization-event","event_type":"observed_relationship","label":"Mitochondrial electrical failure preceded later cell death.","description":"Decavanadate and mixed metavanadate solutions depolarized mitochondria in neonatal rat cardiomyocytes within six hours; half-maximal depolarization occurred near 6.5 micromolar total vanadium.","status":"provisional","compartment":null,"participants":[{"entity":{"id":"ab633bfc-d259-5deb-ac81-a3383f79d4bf","slug":"decavanadate","display_name":"Decavanadate(V)","entity_type_key":"chemical_species"},"role":"subject","stoichiometry":null,"state_label":"","sequence_order":0,"notes":""},{"entity":{"id":"7de13713-9286-548d-8192-102dfd7ef836","slug":"rat-cardiomyocyte-vanadate-depolarization","display_name":"Mitochondrial depolarization in vanadate-exposed neonatal rat cardiomyocytes","entity_type_key":"cellular_process"},"role":"target","stoichiometry":null,"state_label":"","sequence_order":1,"notes":""},{"entity":{"id":"c5cbad45-22c6-594b-ab6b-71880dab1b24","slug":"vanadium","display_name":"Vanadium","entity_type_key":"nutrient_element"},"role":"context_participant","stoichiometry":null,"state_label":"","sequence_order":2,"notes":""},{"entity":{"id":"5acecb4f-d4c7-5549-8950-bf6e2085349d","slug":"metavanadate-assay-solution","display_name":"Metavanadate assay solution with mixed oligomers","entity_type_key":"chemical_species"},"role":"context_participant","stoichiometry":null,"state_label":"","sequence_order":3,"notes":""}]},"contexts":[{"dimension":"evidence_access","value_text":"Primary abstract","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"experimental_model","value_text":"Neonatal rat cardiomyocytes; fluorescent membrane-potential probes.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"limitations","value_text":"Total vanadium differs from decamer concentration: 6.5 micromolar total V equals 0.65 micromolar V10. No human threshold is established.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"Vanadium collection; molecular form, preparation, species, exposure and manipulation remain explicit.","comparator":null,"unit":null,"notes":"","entity":{"slug":"vanadium","display_name":"Vanadium","entity_type_key":"nutrient_element"}},{"dimension":"plain_language","value_text":"Mitochondrial electrical failure preceded later cell death.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"Vanadate induces necrotic death in neonatal rat cardiomyocytes through mitochondrial membrane depolarization. · 2008 · https://pubmed.ncbi.nlm.nih.gov/18251508/ · DOI 10.1021/tx700204r","comparator":null,"unit":null,"notes":"","entity":null}],"evidence":[{"id":"561957e3-7f10-512a-91aa-7eae7b2f4dda","evidence_kind":"source_excerpt","locator":"Lines 286-292","start_line":286,"end_line":292,"excerpt":"## vanadium-cardiac-depolarization\nMitochondrial electrical failure preceded later cell death.\nDecavanadate and mixed metavanadate solutions depolarized mitochondria in neonatal rat cardiomyocytes within six hours; half-maximal depolarization occurred near 6.5 micromolar total vanadium.\nModel: Neonatal rat cardiomyocytes; fluorescent membrane-potential probes.\nLimitations: Total vanadium differs from decamer concentration: 6.5 micromolar total V equals 0.65 micromolar V10. No human threshold is established.\nEvidence access: Primary abstract\nVanadate induces necrotic death in neonatal rat cardiomyocytes through mitochondrial membrane depolarization. · 2008 · https://pubmed.ncbi.nlm.nih.gov/18251508/ · DOI 10.1021/tx700204r","model_system":"Neonatal rat cardiomyocytes; fluorescent membrane-potential probes.","directness":"reported_statement","verification_status":"source_derived_draft","notes":"Original curation paraphrase; evidence access and experimental limitations specified.","relationship":"supports","weight":1.0,"link_notes":"","source":{"id":"e4d5d0ba-529b-540f-96ed-e719d116ccfd","stable_key":"import-335be270-ea4a-5c8e-ad04-964fd22a439e","title":"Vanadium: speciation, phosphate-sensitive enzymes and cross-nutrient mechanisms (2026-09-19)","document_type":"imported_text","citation_label":"AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text.","file_path":"","sha256":"d36b30d972e756ca4d19b66f976980e206c65025bd4bbf4c127c17320bd019c2","revision_id":"70d42967-8032-5627-8670-f59841735e89","review_status":"unverified_draft","notes":""}}],"relations":[],"conflicts":[],"corrections":[],"research":null}