{"id":"502b6c2e-d6d1-508c-b3a4-a6fa1b8bdd94","stable_key":"10aa417f-4b03-599f-a453-4aa09edeb27c:alanine-spt-human-serine","predicate":"reduces_measured","statement":"A pilot study in 14 HSAN1 patients found reduced deoxysphingolipid levels during oral serine supplementation.","claim_class":"observational","status":"source_derived_draft","evidence_grade":"ungraded","direction":"context_dependent","is_public":true,"mechanism_event_id":"b8018b91-ea82-5dec-848d-5f311ff26b52","mechanism_event_label":"The human pilot measured a biochemical response.","subject":{"id":"c882cd0b-9d83-5b07-bd1c-fe4d45657dcb","slug":"l-serine","display_name":"L-Serine","entity_type_key":"small_molecule"},"object":{"id":"4d9df16d-24fa-5dc5-ab2a-2369a6a0399d","slug":"1-deoxysphingolipids","display_name":"1-Deoxysphingolipids","entity_type_key":"lipid"},"evidence_count":1,"mechanism_event":{"id":"b8018b91-ea82-5dec-848d-5f311ff26b52","stable_key":"10aa417f-4b03-599f-a453-4aa09edeb27c:alanine-spt-human-serine-event","event_type":"observed_relationship","label":"The human pilot measured a biochemical response.","description":"A pilot study in 14 HSAN1 patients found reduced deoxysphingolipid levels during oral serine supplementation.","status":"provisional","compartment":null,"participants":[{"entity":{"id":"c882cd0b-9d83-5b07-bd1c-fe4d45657dcb","slug":"l-serine","display_name":"L-Serine","entity_type_key":"small_molecule"},"role":"subject","stoichiometry":null,"state_label":"","sequence_order":0,"notes":""},{"entity":{"id":"4d9df16d-24fa-5dc5-ab2a-2369a6a0399d","slug":"1-deoxysphingolipids","display_name":"1-Deoxysphingolipids","entity_type_key":"lipid"},"role":"target","stoichiometry":null,"state_label":"","sequence_order":1,"notes":""},{"entity":{"id":"ebdc4461-c059-563e-88b0-422c21fdaa25","slug":"alanine","display_name":"L-Alanine","entity_type_key":"small_molecule"},"role":"context_participant","stoichiometry":null,"state_label":"","sequence_order":2,"notes":""},{"entity":{"id":"da1ba1a7-e457-5459-8e95-a2c405c3330c","slug":"sptlc1","display_name":"Human serine palmitoyltransferase long-chain base subunit 1","entity_type_key":"protein"},"role":"context_participant","stoichiometry":null,"state_label":"","sequence_order":3,"notes":""}]},"contexts":[{"dimension":"availability_state","value_text":"machinery_impairment","comparator":null,"unit":null,"notes":"Imported condition classification; unverified.","entity":null},{"dimension":"evidence_access","value_text":"Primary abstract","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"experimental_model","value_text":"Small human HSAN1 serine-supplementation pilot.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"limitations","value_text":"Biomarker lowering alone does not establish neurological recovery, and the intervention was serine rather than alanine.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"L-Alanine collection; species, compartment, exposure, co-substrates and manipulation remain explicit.","comparator":null,"unit":null,"notes":"","entity":{"slug":"alanine","display_name":"L-Alanine","entity_type_key":"small_molecule"}},{"dimension":"plain_language","value_text":"The human pilot measured a biochemical response.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"Oral L-serine supplementation reduces production of neurotoxic deoxysphingolipids in mice and humans with hereditary sensory autonomic neuropathy type 1. · 2011 · https://pubmed.ncbi.nlm.nih.gov/22045570/ · DOI 10.1172/JCI57549","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"trigger_kind","value_text":"machinery_impairment","comparator":null,"unit":null,"notes":"Imported condition classification; unverified.","entity":null}],"evidence":[{"id":"1f5bdc4c-f416-540b-b0ae-428143a4da58","evidence_kind":"source_excerpt","locator":"Lines 448-454","start_line":448,"end_line":454,"excerpt":"## alanine-spt-human-serine\nThe human pilot measured a biochemical response.\nA pilot study in 14 HSAN1 patients found reduced deoxysphingolipid levels during oral serine supplementation.\nModel: Small human HSAN1 serine-supplementation pilot.\nLimitations: Biomarker lowering alone does not establish neurological recovery, and the intervention was serine rather than alanine.\nEvidence access: Primary abstract\nOral L-serine supplementation reduces production of neurotoxic deoxysphingolipids in mice and humans with hereditary sensory autonomic neuropathy type 1. · 2011 · https://pubmed.ncbi.nlm.nih.gov/22045570/ · DOI 10.1172/JCI57549","model_system":"Small human HSAN1 serine-supplementation pilot.","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":"01c5554c-a8ba-5c86-9b01-a0fa1a886cdb","stable_key":"import-10aa417f-4b03-599f-a453-4aa09edeb27c","title":"L-Alanine: carbon, nitrogen, protein synthesis 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":"8ce7dd76c88b2e25fa23d93f9655a244aadb9d90f55ec8b18ecf0fd4625a61d2","revision_id":"4ed32258-0213-599a-a272-6f8f62280773","review_status":"unverified_draft","notes":""}}],"relations":[],"conflicts":[],"corrections":[],"research":null}