Polyunsaturated phospholipid domain (PUFA-PL domain)

Polyunsaturated phospholipid domains are specialized regions within biological membranes characterized by a high concentration of phospholipids containing polyunsaturated fatty acids (PUFAs), such as arachidonic acid and docosahexaenoic acid. These domains are essential for maintaining membrane fluidity and facilitating dynamic processes like vesicle trafficking, endocytosis, and the rapid signaling required in neuronal synapses (PMID: 25172131). Unlike rigid lipid rafts, PUFA-rich domains are highly flexible and disordered, providing the necessary environment for the conformational changes of various membrane-bound proteins (PMID: 28461168). In clinical contexts, these domains are the primary substrates for lipid peroxidation during ferroptosis, an iron-dependent form of regulated cell death that is increasingly targeted in cancer therapy (PMID: 31160817). Therapeutic strategies involve either the induction of lipid peroxidation to kill cancer cells using agents like RSL3 or the protection of these domains using antioxidants like Ferrostatin-1 to treat neurodegenerative and ischemic diseases (PMID: 22595070). Understanding the spatial organization and chemical vulnerability of these domains is crucial for developing precision medicines that modulate cell survival through membrane lipid manipulation.

Other names

PUFA-rich membrane domainsPolyunsaturated fatty acid-containing phospholipid domainsNon-raft lipid domainsDisordered membrane domainsPUFA-PL domains

Modulation of membrane biophysical properties and serving as the primary site for iron-dependent lipid peroxidation during ferroptotic cell death (PMID: 31160817).