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|Section2= |Section3= }} Levuglandins are reactive aldehydes formed by the spontaneous rearrangement of prostaglandin H (PGH). Enantiomerically pure levuglandin (LG) E2 can also be formed through the cyclooxygenase (COX) pathway by a rearrangement of the prostaglandin (PG) endoperoxide PGH 2. They are nonclassic eicosanoids. One species, levuglandin E2, (LGE2), forms neurotoxic adducts with amyloid beta. Levuglandins and isolevuglandins can damage proteins by covalent adduction, thereby interfering with their normal functions. These lipid-derived protein modifications may serve as dosimeters of oxidative injury. Elevated plasma levels of isoLG-protein epitopes are associated with atherosclerosis but are independent of total cholesterol, a classical risk factor. ==History== Though spontaneous rearrangements of PGH2 are known to generate prostaglandins (PG) PGD2 and PGE2.〔M. Hamberg and B. Samuelsson, Detection and isolation of an endoperoxide intermediate in prostaglandin biosynthesis, Proc. Natl. Acad. Sci. U.S.A. 70 (1973), pp. 899–903.〕〔D.H. Nugteren and E. Hazelhof, Isolation and properties of intermediates in prostaglandin biosynthesis, Biochim. Biophys. Acta 326 (1973) (3), pp. 448–461.〕 Prof. Robert Salomon at Case Western Reserve University discovered that a novel alternative rearrangement also occurs that producing two γ-ketoaldehydes〔R.G. Salomon, D.B. Miller, M.G. Zagorski and D.J. Coughlin, Prostaglandin endoperoxides. 14. Solvent-induced fragmentation of prostaglandin endoperoxides. New aldehyde products from PGH2 and a novel intramolecular 1 *2-hydride shift during endoperoxide fragmentation in aqueous solution, J. Am. Chem. Soc. 106 (1984) (20), pp. 6049–6060.〕 and named them levuglandins LGD2 and LGE2 as they are derivatives of levulinaldehyde with prostanoid side chains. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Levuglandin」の詳細全文を読む スポンサード リンク
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