Physiological nutrient-dependent processes

Physiological nutrient-dependent processes encompass the integrated biological systems that allow organisms to detect and adapt to changes in nutrient availability. These processes are primarily mediated by highly conserved nutrient-sensing pathways, including the mechanistic target of rapamycin (mTOR) for amino acids and the adenosine monophosphate-activated protein kinase (AMPK) for energy status (1). These pathways coordinate fundamental cellular activities such as protein synthesis, lipid metabolism, and autophagy to maintain metabolic homeostasis (2). Dysregulation of these processes is a central feature of many human diseases, including type 2 diabetes, obesity, and various cancers, where nutrient signaling is often hijacked to drive uncontrolled cell proliferation (3). While the term describes a broad category of physiological activity rather than a single molecular target, specific components within these processes are major focuses for therapeutic intervention (4). For example, drugs like metformin and rapamycin are used to modulate these pathways to treat metabolic disorders and certain malignancies, respectively (5).

Other names

Nutrient sensingNutrient-dependent signalingMetabolic regulationNutrient-driven physiological responses

Modulation of intracellular signaling pathways (such as mTOR, AMPK, and GCN2) that sense and respond to the availability of glucose, amino acids, and cellular energy levels.