Phosphatidylcholine-containing phospholipid membrane (PC membrane)

Phosphatidylcholine-containing phospholipid membranes represent the primary structural framework of eukaryotic cells, forming the lipid bilayer that defines cellular and organelle boundaries (Vance, J. E., & Vance, D. E., 2008, Elsevier). Phosphatidylcholine (PC) is the most prevalent phospholipid in these membranes, essential for maintaining optimal membrane fluidity and providing a scaffold for the function of integral membrane proteins (Alberts B, et al., 2002, Molecular Biology of the Cell). Beyond their structural role, these membranes serve as reservoirs for signaling precursors, such as diacylglycerol and arachidonic acid, and are involved in vital processes such as endocytosis and exocytosis (Exton, J. H., 1994, J. Biol. Chem.). In clinical medicine, these membranes are targeted by specific antimicrobial agents that exploit differences in lipid composition to induce membrane poration and cell lysis (Humphries, R. M., et al., 2013, Clin. Microbiol. Rev.). Furthermore, exogenous phosphatidylcholine is utilized in lipid replacement therapies for conditions like respiratory distress syndrome and liver disease, where endogenous membrane integrity or surfactant levels are compromised (Cole, A. S., et al., 2001, Am. J. Respir. Crit. Care Med.). PC-containing membranes also serve as the basis for liposomal drug delivery systems, which enhance the pharmacokinetics of various therapeutic agents.

Other names

Lecithin-containing membranePhosphatidylcholine bilayerPC-rich lipid bilayerPhosphatidylcholine-containing lipid matrix

Drugs interact with these membranes through several mechanisms: direct integration to replenish deficient lipid levels (e.g., pulmonary surfactants), alteration of membrane fluidity and lateral organization (e.g., anesthetics), or calcium-dependent insertion leading to pore formation and membrane depolarization (e.g., daptomycin) (Taylor, S. D., & Palmer, M., 2016, Bioorg. Med. Chem.; Yeagle, P. L., 2016, The Membranes of Cells).