Nitroxyl anion donor, Angeli's salt, does not develop tolerance in rat isolated aortae

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The nitroxyl anion (HNO) is emerging as a novel regulator of cardiovascular function with therapeutic potential in the treatment of diseases such as heart failure. It remains unknown whether tolerance develops to HNO donors, a limitation of currently used nitrovasodilators. The susceptibility of the HNO donor, Angeli s salt (AS), to the development of vascular tolerance was compared with the NO donors, glyceryl trinitrate (GTN) and diethylamine/NONOate (DEA/NO) in rat isolated aortae. Vasorelaxation to AS was attenuated (P/=AS>>DEA/NO. Pretreatment with 10, 30, and 100 micromol/L of GTN for 60 minutes induced a 4- (P>AS>GTN. GTN did not induce cross-tolerance to either AS or DEA/NO. In contrast, pre-exposure to DEA/NO, but not AS, caused a concentration-dependent attenuation (P
Original languageEnglish
Pages (from-to)885 - 892
Number of pages8
Issue number4
Publication statusPublished - 2007

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