Cell membrane phospholipids and lipid rafts

Cell membrane phospholipids and lipid rafts are fundamental components of the cellular architecture that regulate the physical properties and functional organization of the plasma membrane. Phospholipids form the basic structural bilayer, while lipid rafts are specialized, highly ordered microdomains enriched in cholesterol and sphingolipids that serve as platforms for signal transduction and protein trafficking (Simons & Toomre, 2000). These structures are vital for maintaining cellular homeostasis, facilitating cell-cell communication, and coordinating the recruitment of signaling molecules like G proteins and tyrosine kinases. In various diseases, including cancer and neurodegeneration, alterations in lipid composition and raft stability contribute to pathological signaling and protein aggregation (Michel & Bakovic, 2007). Therapeutic targeting of these lipids, often referred to as membrane lipid therapy, aims to disrupt the life cycle of pathogens or reorganize signaling platforms in diseased cells to restore normal function (Escribá et al., 2008).

Other names

Plasma membrane lipidsLipid microdomainsDetergent-resistant membranesSphingolipid-cholesterol raftsMembrane bilayer

Drugs targeting cell membrane phospholipids and lipid rafts typically act by disrupting membrane integrity, forming trans-membrane pores, or displacing signaling proteins from lipid microdomains to inhibit aberrant signaling pathways (Escribá et al., 2008; Simons & Toomre, 2000).