24(S)-Hydroxycholesterol (CAS 474-73-7)

24(S)-Hydroxycholesterol plays a pivotal role in the brain′s metabolic processes as a significant cholesterol derivative. Functioning as an endogenous agonist for the liver X receptor (LXR), it engages in regulatory mechanisms that are critical for maintaining cellular cholesterol homeostasis. Its interaction with LXR facilitates the transcription of genes involved in the expulsion of excess cholesterol from cells, underscoring its fundamental role in the intricate balance of cholesterol levels within the brain. Moreover, 24(S)-Hydroxycholesterol exhibits neurotoxic effects on human neuroblastoma cells, indicating its potential impact on neurodegenerative processes by influencing the survival and function of neural cells. This metabolite is also intricately linked with several metabolic pathways, including its involvement in the cerebrotendinous xanthomatosis (CTX) pathway, bile acid biosynthesis, and the pathology of congenital bile acid synthesis defects type II and III. Through its participation in these pathways, 24(S)-Hydroxycholesterol contributes to the complex network of cholesterol metabolism and its derivatives, reflecting its importance not only in neuronal function and health but also in the broader context of lipid homeostasis and metabolic diseases.