Understanding molecular role of lipids for Alzheimer's disease.

Human health and neurological functions are significantly impacted by lipids, the fundamental building block of cell membranes. The central nervous system is rich in lipids, and they are evidently disturbed in neurological conditions and neurodegenerative diseases like Alzheimer's disease (AD). Alteration in lipid profile is highly linked with aging. During early onset of AD, there is a noted lipid peroxidation and modifications of fatty acids at the level of lipid rafts in the neuronal cells. AD is an age-linked neurodegenerative condition with multifaceted etiology, with combining genetic and environmental risk factors, which lacks disease-modifying therapies. While the aberrant deposition of lipids was shown in the initial studies of AD neuropathology. Clinically, lipidomic and metabolomic research have constantly exposed the changes in the levels of various lipid classes emerging in early onset of AD individuals. Also, decades of investigations have discovered multifactorial link between lipid metabolism and key AD pathogenic pathway such as amyloidogenesis, bioenergetic deficit, oxidative stress, neuroinflammation, and myelin degeneration. Herewith, we highlighted the features that impact lipid composition in neuronal cells, and the association of different lipids with known aspects of AD pathogenesis, and potential therapeutics that aim lipid crossroads.