C18:1 CE

C18:1 CE (CAS No.: 303-43-5) is a naturally occurring cholesterol ester formed by the esterification of cholesterol with oleic acid, broadly classified within neutral lipids that play central roles in lipid transport, intracellular storage, and maintenance of membrane architecture in mammalian systems. As a key component of lipid droplets and circulating lipoproteins, it contributes to the regulation of lipid homeostasis and is closely associated with metabolic processes, including cholesterol trafficking and esterification pathways mediated by enzymes such as acyl-CoA:cholesterol acyltransferases. Alterations in its cellular and tissue levels have been linked to pathological states, notably in cancer biology, where its accumulation has been correlated with prostate cancer progression, supporting its investigation as a potential biomarker in disease stratification and metabolic profiling studies. Mechanistically, C18:1 CE participates in lipid signaling networks that influence membrane dynamics and lipid droplet formation, indirectly modulating pathways involved in cell proliferation and survival. In experimental settings, it is widely utilized in the formulation of lipid-based delivery systems, including liposomes and cationic solid lipid nanoparticles, to facilitate nucleic acid delivery and RNA interference applications, thereby enabling studies in gene silencing and targeted therapeutics. In vitro, its biological effects are typically evaluated within concentration ranges spanning nanomolar to micromolar levels depending on the model system, while in vivo applications vary according to formulation and delivery strategy, making it a versatile tool in lipid metabolism research, drug delivery development, and translational biomedical investigations.