Microbial Metabolite

Microbial metabolites function as critical mediators between host physiology and microbiome activity, regulating immunity, metabolic homeostasis, and tissue repair^[1][2][3]. Mechanistically, these metabolites modulate host cellular signaling through pathways including AMPK, PPARα, and HDAC inhibition, influencing lipid metabolism, bone homeostasis, and epigenetic regulation^[4][5][6][7]. In disease models, specific microbial metabolites such as 10-hydroxystearic acid and imidazole propionate demonstrate dual roles in hepatic regeneration and bone dysfunction, respectively, underscoring context-dependent effects^[5][6]. Compared with related isoforms, certain microbial metabolites act selectively on target enzymes or receptors, exemplified by butyrate and valeric acid inhibiting class I HDACs without affecting other isoforms^[7]. For experimental applications, metabolites have been leveraged as diagnostic markers in gastric cancer, modulators of drug toxicity, and indicators of microbial-host metabolic interactions^[2][8][9]. Bioinformatic tools, including MetOrigin, enable precise discrimination of microbial metabolite origins and facilitate pathway enrichment analysis, enhancing identification of functionally relevant compounds^[4]. The integration of metagenomics, metabolomics, and metaproteomics supports targeted discovery of microbial metabolites for both mechanistic studies and therapeutic interventions^[3][10][11].