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- W2015959684 abstract "Intravenous administration of copper (up to a final concentration of ca. 35 μmol/l in the plasma) led to a progressive, dramatic fall of mean arterial pressure in rats. Copper-induced pressure changes were comparable to those elicited by 2 mg/kg LPS, and were greatly prevented by previous infusion of the inducible NOS (NOS-II) inhibitors aminoguanidine or l-N(6)-(l-imino-ethyl)lysine. RT-PCR analysis showed a significant transcriptional induction of NOS-II in a number of tissues, including aorta, liver, and lungs. Immunohistochemistry revealed that NOS-II was massively synthesized in these tissues upon copper or LPS treatment. The protein was active, as revealed by enzymatic assays on lung homogenates and by the large increase of nitrite/nitrate levels in the plasma. Copper-challenged rats displayed elevated plasma levels of TNFα. Extensive formation of nitrotyrosines, indicative of peroxynitrite production, was accompanied by marked morphological changes in examined tissues. Our results clearly show that copper can act as a proinflammatory agent through activation of the nitric oxide pathway, leading to the same pathological frame induced by bacterial lipopolysaccharide." @default.
- W2015959684 created "2016-06-24" @default.
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- W2015959684 date "2003-05-01" @default.
- W2015959684 modified "2023-09-23" @default.
- W2015959684 title "Copper induces type II nitric oxide synthase in vivo" @default.
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- W2015959684 doi "https://doi.org/10.1016/s0891-5849(03)00110-2" @default.
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