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We have previously shown that peroxynitrite (PN) selectively impaired prostacyclin (PGI 2 )-dependent vasorelaxation by tyrosine nitration of PGI 2 synthase in an in situ model (Zou MH, Jendral M and Ullrich V, Br J Pharmacol 126: 1283-1292, 1999). By using this established model, we tested whether or not ebselen (2-phenyl-1,2-benzisoselenazol-3(2H)-one), which reacts rapidly with...
The decomposition of peroxynitrite (PON) in aqueous solutions was investigated by monitoring the release of dioxygen as a function of pH together with the various reaction products generated from phenol. This substrate was used as a mechanistic model for tyrosine nitration in prostacyclin synthase for which we have reported a highly efficient nitration and inhibition by PON (Zou, M., Martin, C., and...
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