Plasmalogen pool and ether phospholipid composition in cellular membranes (Pls)

Plasmalogens are a specialized subclass of ether phospholipids characterized by a vinyl-ether bond at the sn-1 position of the glycerol backbone. They constitute a significant portion of the phospholipid pool in human tissues, particularly in the brain, heart, and myelin, where they play critical roles in maintaining membrane fluidity and facilitating membrane fusion events (Nagan & Zoeller, 2001, Prog Lipid Res). Beyond their structural roles, plasmalogens serve as vital endogenous antioxidants, as their vinyl-ether bond is uniquely sensitive to and can neutralize reactive oxygen species, thereby protecting other membrane lipids and proteins from oxidative damage (Braverman & Moser, 2012, Biochim Biophys Acta). Depletion of the plasmalogen pool is a primary feature of peroxisomal disorders like Rhizomelic Chondrodysplasia Punctata (RCDP) and is increasingly recognized as a contributing factor in neurodegenerative diseases such as Alzheimer's and Parkinson's (Wood et al., 2011, Lipids Health Dis). Therapeutic interventions aimed at restoring the plasmalogen pool typically involve the administration of synthetic precursors, such as PPI-1011, or dietary supplements like scallop-derived plasmalogens, which bypass defective peroxisomal biosynthetic pathways to replenish cellular levels.

Other names

PlasmalogensEther phospholipidsVinyl-ether lipids1-O-alk-1'-enyl-2-acyl-sn-glycero-3-phospholipidsEther-linked glycerophospholipids

Lipid replacement therapy to restore membrane levels and antioxidant capacity