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Extracellular phospholipase A2 inhibitors suppress central nervous system inflammation

✍ Scribed by Florence Pinto; Talma Brenner; Phyllis Dan; Miron Krimsky; Saul Yedgar

Book ID: 102223166
Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 127 KB
Volume: 44
Category: Article
ISSN: 0894-1491
DOI: 10.1002/glia.10296

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✦ Synopsis

Phospholipase A2 (PLA2) plays a key role in the production of proinflammatory mediators, namely the arachidonic acid-derived eicosanoids, lysophospholipids, and platelet-activating factor, and indirectly influences the generation of cytokines, nitric oxide (NO), and free radicals. Accordingly, regulation of its activity is important in the treatment of inflammation. Since the main site of PLA2 action in inflammatory processes is the cell membrane, we synthesized extracellular PLA2 inhibitors (ExPLIs) composed of N-derivatized phosphatidyl-ethanolamine linked to polymeric carriers. These membrane-anchored lipid conjugates do not penetrate the cell and interfere with vital phospholipid metabolism or cell viability. The ExPLIs markedly inhibited central nervous system inflammation. This was reflected by the suppressed production and secretion of lipopolysaccharide-induced sPLA2, prostaglandin E2, and NO by glial cells and by the amelioration of experimental autoimmune encephalomyelitis in rats and mice.

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