glycerol

glycerol (CAS No.: 56-81-5) is a trihydroxy sugar alcohol widely distributed in biological systems as a central intermediate in carbohydrate and lipid metabolism, serving as a backbone for triglycerides and phospholipids and participating in pathways such as glycolysis, gluconeogenesis, and glycerolipid metabolism. In biomedical research, glycerol is primarily categorized as a metabolic intermediate and biochemical reagent, frequently employed to study energy homeostasis, lipid biosynthesis, and cellular osmotic regulation. Although it does not act as a classical ligand for specific molecular targets, glycerol is metabolized by enzymes including glycerol kinase and glycerol-3-phosphate dehydrogenase, thereby influencing redox balance and mitochondrial function. Its biological effects are generally observed at millimolar concentrations in vitro, reflecting its role as a physiological metabolite rather than a high-affinity bioactive compound. Glycerol is extensively used in laboratory applications, including sample preparation, stabilization of proteins and enzymes, cryopreservation of cells, and as a key component in polyacrylamide gel electrophoresis for gel casting and sample loading. Ready-to-use formulations, such as 20% glycerol stock solutions, facilitate reproducible experimental workflows. In cell-based and biochemical assays, glycerol is applied across a range of concentrations depending on experimental design, including studies of osmotic stress, metabolic flux, and compound solubility, while in animal models it may be used to modulate metabolic states or as a vehicle control, underscoring its versatility in drug discovery and life sciences research.