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- W2044498722 abstract "In biological systems, nitric oxide (NO) may be generated non-enzymatically from nitrite (nitrite-derived NO), in addition to nitric oxide synthase-catalyzed (NOS-derived) L-arginine-dependent formation. Through recordings of expired NO, we studied the influence of temperature on NOS- and nitrite-derived NO in the perfused lung. We also studied the impact of other influencing factors (O(2), CO(2), and pH) on nitrite-derived NO in the same system. Both NO-generating systems exhibited biphasic temperature dependence with a positive correlation between temperature and NO generation that peaked between 42 and 44 degrees C. The nitrite-derived NO generation was enhanced by hypoxia alone (>20 x after 5 min) and further by concomitant increase in CO(2). The CO(2) effect could not be explained by changes in extracellular pH and was unaltered by acetazolamide. We conclude that the temperature dependence in the known enzyme-catalyzed NOS-derived NO and especially in the nitrite-derived NO strengthens the hypothesis that an enzyme could be involved in nitrite-derived NO formation. The enhancement of nitrite-derived NO by increases in CO(2) suggests that this system could be of importance to improve perfusion in ischemic tissues." @default.
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- W2044498722 date "2005-12-01" @default.
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- W2044498722 title "Influence of oxygen, temperature and carbon dioxide on nitric oxide formation from nitrite as measured in expired gas from in situ perfused rabbit lungs" @default.
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- W2044498722 doi "https://doi.org/10.1016/j.vph.2005.08.008" @default.
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