Systemic Metabolic and Epigenetic Pathways

Systemic Metabolic and Epigenetic Pathways represent the integrated network where cellular metabolic states directly influence the epigenetic landscape and subsequent gene expression. This axis is governed by the availability of metabolic intermediates—such as acetyl-CoA, S-adenosylmethionine (SAM), and alpha-ketoglutarate—which serve as essential substrates or cofactors for enzymes that modify DNA and histones (Lu and Thompson, 2012, Cell). By linking nutrient sensing to transcriptional control, these pathways allow organisms to adapt to environmental changes and maintain physiological homeostasis. In pathological conditions like cancer, metabolic reprogramming (e.g., the Warburg effect or IDH1/2 mutations) leads to the accumulation of oncometabolites that inhibit epigenetic regulators, driving oncogenic gene expression and tumor progression (Kaelin and McKnight, 2013, Science). Therapeutic strategies targeting this system involve modulating metabolic enzymes or using epigenetic inhibitors to restore normal gene expression patterns, though the systemic nature of these pathways presents significant challenges for selectivity. Monitoring biomarkers like specific metabolite ratios or histone modification patterns is crucial for assessing the efficacy and safety of these interventions (Su et al., 2016, Cell Metab).

Other names

Metabolo-epigenetic axisMetabolic-epigenetic crosstalkNutrient-epigenetic signalingImmunometabolism-epigenetic link

Regulation of the availability of metabolic substrates and cofactors, such as acetyl-CoA, S-adenosylmethionine (SAM), and NAD+, which are required for the activity of epigenetic enzymes including histone acetyltransferases, DNA methyltransferases, and sirtuins.