Cholesterol metabolism regulates Tauopathy in Alzheimer's disease.

Cholesterol, produced by astrocytes, is vital for the formation and maintenance of synapse, highlighting the significance of lipid metabolism in neuronal health. Neural stem cells (NSCs) are versatile, self-renewing and capable of differentiating into neurons, astrocytes, and oligodendrocytes, playing a pivotal role in both embryonic development and adult neurogenesis. In the central nervous system (CNS), NSCs primarily reside in the subventricular zone (SVZ) and the sub-granular layer of the dentate gyrus, where they give rise to neural progenitors and subsequently to neurons and glial cells. Oligodendrocytes play a crucial role in the CNS function and myelin sheath formation, which is essential for rapid neuronal signal transmission. Astrocytes contribute to brain homeostasis by regulating lipid metabolism and providing metabolic support to neurons. Sphingolipids and phospholipids are integral to neural cell membrane structure and function, influencing processes such as neurogenesis, cell signaling, and synaptic plasticity. Furthermore, the ApoE4 allele impacts lipid metabolism, affecting the risk of neurodegenerative diseases. This paper explores the role of various cell types and lipids in the CNS, emphasizing the importance of lipid metabolism in maintaining neural function and the implications for neurodegenerative conditions.