Novel donors of nitric oxide derived of S-nitrosocysteine possessing antioxidant activities.
نویسندگان
چکیده
Novel S-nitrosothiols possessing a phenolic function were investigated as nitric oxide (NO) donors. A study of NO release from these derivatives was carried out by electron spin resonance (ESR). All compounds gave rise to a characteristic three-line ESR signal in the presence of the complex [Fe(II)(MGD)2], revealing the formation of the complex [Fe(II)(MGD)2(NO)]. Furthermore, tests based on cytochrome c reduction were performed in order to study the ability of each phenolic disulfide, the final organic decomposition product of S-nitrosothiols, to trap superoxide radical anion (O2-). This study revealed a high reactivity of 1b and 3b towards O2-. For these two compounds, the respective inhibitory concentration (IC) 50 values were 92 microM and 43 microM.
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عنوان ژورنال:
- Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas
دوره 32 11 شماره
صفحات -
تاریخ انتشار 1999