oncometabolite
A metabolic compound that accumulates due to cancer-associated enzyme defects and contributes to tumorigenesis through epigenetic or cellular signaling changes.
Full Definition
An oncometabolite is a metabolic intermediate that accumulates to abnormally high levels in cancer cells due to mutations in metabolic enzymes, subsequently contributing to tumor development and progression. The most well-characterized oncometabolites include 2-hydroxyglutarate (produced by mutant IDH1/2 enzymes), succinate (from succinate dehydrogenase mutations), and fumarate (from fumarate hydratase mutations). These compounds can act as competitive inhibitors of α-ketoglutarate-dependent dioxygenases, leading to widespread epigenetic changes including DNA and histone hypermethylation. Oncometabolites represent a direct link between metabolic dysfunction and cancer biology, offering both diagnostic biomarkers and potential therapeutic targets. Detection of oncometabolites can guide treatment decisions, particularly in brain tumors and certain sarcomas.
Usage
Usage note: Single word compound; most commonly refers to 2-HG, succinate, or fumarate in clinical contexts.
In Context
- "The presence of 2-hydroxyglutarate oncometabolite confirmed IDH1 mutation status in the glioma." — Metabolomic analysis report
- "Oncometabolite accumulation led to CpG island hypermethylation and tumor suppressor silencing." — Research publication