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- W1982172912 abstract "Atherosclerosis is a disorder of lipid metabolism as well as a chronic inflammatory disease. Cyclooxygenase-2 (COX-2), an inducible isoform responsible for high levels of prostaglandin production during inflammation and immune responses, mediates a variety of biological actions involved in vascular pathophysiology. We have previously shown that COX-2 gene expression is dramatically induced by a lipid-derived endogenous electrophile, 4-hydroxy-2-nonenal (HNE) (Kumagai, T., Matsukawa, N., Kaneko, Y., Kusumi, Y., Mitsumata, M., and Uchida, K. (2004) J. Biol. Chem. 279, 48389-48396). In the present study, based on the finding that HNE induced COX-2 expression only in the serum-containing media, we characterized a serum component essential for the HNE-induced COX-2 induction and found that low density lipoprotein (LDL) that had been denatured by freeze-thawing or oxidized LDL might be involved in the COX-2 induction. Moreover, we characterized the cellular events triggered by the combined stimulus of HNE and oxidized LDL and established that COX-2 induction is regulated by two sets of signaling mechanisms, one for the up-regulation of the scavenger receptor CD36 by HNE and one for the CD36-mediated COX induction by oxidized LDL. These findings represent a demonstration of a link between lipoprotein modification and activation of the inflammatory potential of macrophages." @default.
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- W1982172912 date "2007-08-01" @default.
- W1982172912 modified "2023-10-17" @default.
- W1982172912 title "Identification of a Serum Component That Regulates Cyclooxygenase-2 Gene Expression in Cooperation with 4-Hydroxy-2-nonenal" @default.
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- W1982172912 doi "https://doi.org/10.1074/jbc.m703212200" @default.
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