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Blood and Tissue Nitric Oxide Products

Blood and Tissue Nitric Oxide Products

Paperback

Chemistry

ISBN10: 3639178092
ISBN13: 9783639178098
Publisher: Blues Kids Of Amer
Published: Aug 18 2009
Pages: 152
Weight: 0.51
Height: 0.35 Width: 6.00 Depth: 9.00
Language: English
There is mounting evidence that the established paradigm of nitric oxide (NO) biochemistry, from formation through NO synthases, over interaction with soluble guanylyl cyclase, to eventual disposal as nitrite/nitrate, represents only part of a richer chemistry through which NO elicits biological signalling. Additional pathways have been suggested that include interaction of NO-derived metabolites with thiols and metals to form S-nitrosothiols (RSNOs) and metal nitrosyls. Despite the overwhelming attention paid in this regard to RSNOs, little is known about the stability of these species, their significance outside the circulation, and whether other nitros(yl)ation products are of equal importance. Our study further reveals that all NO-derived products are highly dynamic, have fairly short lifetimes, and are linked to tissue oxygenation and redox state. Moreover, tissue nitrite can serve as a significant extravascular pool of NO during brief periods of hypoxia. These findings vastly expand our understanding of the fate of NO in vivo and provide a framework for further exploration of the significance of nitrosative events in redox-sensing and signaling.

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Chemistry