Cardioprotective role of S-nitrosylated hemoglobin from rbc.

Journal Article (Journal Article)

Nitric oxide (NO) is a potent mediator of blood vessel dilation and is released by several cell sources. Red blood cells (rbc) release NO when hemoglobin that has been S-nitrosylated at Cys93 of the β-chain (βCys93) transitions from the oxygenated form to the deoxygenated form. This transition occurs in response to reduced tissue oxygenation and is an important physiologic regulator of hypoxic vasodilation. In this issue of the JCI, Zhang and colleagues demonstrate that S-nitrosylation of hemoglobin at βCys93 is important for tissue oxygenation after cardiac injury. Mice harboring mutations that prevent S-nitrosylation of βCys93 had higher rates of morbidity and mortality following cardiac injury compared with WT; however, adaptive cardiac vascularization was increased in some mutant mice and reduced cardiac injury in these animals. The results of this study reveal a previously unexplored role of S-nitrosylated hemoglobin in cardioprotection.

Full Text

Duke Authors

Cited Authors

  • Piantadosi, CA

Published Date

  • December 1, 2016

Published In

Volume / Issue

  • 126 / 12

Start / End Page

  • 4402 - 4403

PubMed ID

  • 27841761

Pubmed Central ID

  • PMC5127670

Electronic International Standard Serial Number (EISSN)

  • 1558-8238

Digital Object Identifier (DOI)

  • 10.1172/JCI91303


  • eng

Conference Location

  • United States