Gut microbiota-derived acetate production

Gut microbiota-derived acetate production is a fundamental metabolic process where commensal bacteria in the large intestine ferment dietary fibers into acetate, the most prevalent short-chain fatty acid (SCFA) in the human circulatory system (Koh et al., 2016, Cell). This process is primarily carried out by diverse bacterial taxa, including members of the Bifidobacterium and Lactobacillus genera, through pathways such as the Wood-Ljungdahl pathway or the fermentation of pyruvate (Rasoamanana et al., 2012, Journal of Nutrition). Once produced, acetate serves as a vital signaling molecule that crosses the gut-blood barrier to interact with host G protein-coupled receptors, specifically Free Fatty Acid Receptor 2 (FFAR2) and Free Fatty Acid Receptor 3 (FFAR3) (Frost et al., 2014, Nature Communications). These interactions play a crucial role in regulating host energy homeostasis, appetite suppression via the central nervous system, and the modulation of immune responses by promoting the differentiation of regulatory T cells (Smith et al., 2013, Science). Dysregulation of acetate production is linked to various metabolic and inflammatory conditions, including obesity, type 2 diabetes, and inflammatory bowel disease (Perry et al., 2016, Nature). Consequently, this pathway is a significant therapeutic target for interventions such as prebiotics, probiotics, and certain drugs like metformin, which aim to restore a healthy microbial balance and enhance SCFA-mediated signaling (Wu et al., 2017, Nature Medicine).

Other names

Microbial acetate productionGut-derived acetateShort-chain fatty acid (SCFA) productionBacterial acetate fermentation

Modulation of the gut microbiome composition and metabolic activity to increase the fermentation of non-digestible carbohydrates into acetate, which subsequently activates host G protein-coupled receptors FFAR2 and FFAR3 to regulate metabolic and immune pathways.