title: Effect of chlorpromazine associated with liposomes on the biosynthesis of acidic lipids in subcellular membranes.
abstract: The study examined the effect of an association of chlorpromazine, phosphatidic acid and cytidine-diphosphoryl-1,2-diglycerides (CDP-diglycerides) with small unilamellar lecithin liposomes on the formation, hydrolysis and transfer of lipids and cytidine liponucleotides in microsomal and mitochondrial membranes isolated from guinea-pig liver. Association with liposomes undermined the effect of chlorpromazine on these processes, but the type of effect, i.e. inhibitory or stimulatory, was retained. Association of CDP-diglycerides with small unilamellar lecithin liposomes tended to protect this substrate from subcellular uptake, thereby inhibiting phosphatidylinositol and polyglycerophosphatide formation. Phosphatidic acid in the form of liposomes stimulated CDP-diglyceride formation. The nature of fatty acids influenced the magnitude of these effects in polyglycerophosphatide biosynthesis. Transfer of CDP-diglycerides from microsomal to mitochondrial membranes was inhibited by both chlorpromazine associated with liposomes and liposomes alone.
mesh_terms: D000818:Animals; D002746:Chlorpromazine / Q000008:administration & dosage* / Q000494:pharmacology; D004337:Drug Carriers; D006168:Guinea Pigs; D008081:Liposomes; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008563:Membrane Lipids / Q000096:biosynthesis*
chemical_list: D004337:Drug Carriers; D008081:Liposomes; D008563:Membrane Lipids; D002746:Chlorpromazine