Cited by 111Nitric Oxide and Endothelin EffectsSepsis Diagnosis and TreatmentHemoglobin structure and function

Transduction of NO-bioactivity by the red blood cell in sepsis: novel mechanisms of vasodilation during acute inflammatory disease

Crawford, Jack H., Chacko, Balu K., Pruitt, Heather M., Piknova, Barbora, Hogg, Neil, Patel, Rakesh P.·2004·Blood

Abstract

Sepsis is an acute inflammatory disease characterized by dysfunctional blood flow and hypotension. Nitric oxide (NO) is elevated during sepsis and plays an integral role in the associated vascular pathology. However, precise mechanisms and functions of NO in sepsis remain unclear. In this study, we show that red blood cells (RBCs) are foci for nitrosative reactions during acute inflammation, resulting in the formation of cells that can promote systemic vascular relaxation in an uncontrolled manner. Specifically, using experimental models of endotoxemia and surgical sepsis, NO adducts were found in the RBCs, including S-nitrosohemoglobin (SNOHb). These RBCs, referred to as septic RBCs, spontaneously stimulated vasodilation in a manner consistent with elevated SNOHb concentrations. Moreover, relaxation was cyclic guanosine monophosphate (cGMP) dependent and was inhibited by RBC lysis and glutathione but not by the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5 tetramethylimidazoline 1-oxyl 3-oxide (C-PTIO). The potential mechanism of septic RBC-mediated vasorelaxation is discussed and may involve the intermediate, nitroxyl (HNO). Coupled with data showing that NO adducts in septic RBCs were dependent on the inducible nitric oxide synthase and correlated with plasma nitrite, these findings provide a novel framework to understand mechanisms underlying dysfunctional blood flow responses during sepsis. Specifically, the concept that RBCs directly mediate systemic hypotension through NO-dependent mechanisms is discussed.

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Crossref · 10.1182/blood-2004-03-0880

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Authors
Crawford, J. H., Chacko, B. K., Pruitt, H. M., Piknova, B., Hogg, N., & Patel, R. P.
Affiliations
Medical College of Wisconsin (US)
Venue
Blood
Published
2004-09-01
Volume
104
Issue
5
Pages
1375-1382
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W1987088892
Cited by
111
References
62
Citations by year
2026: 1 · 2025: 1 · 2022: 4 · 2021: 4 · 2020: 1 · 2019: 5 · 2017: 9 · 2016: 3 · 2015: 6 · 2014: 5 · 2013: 6 · 2012: 7
FWCI
5.34
Type
journal article
Language
en
Open access
closed
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL070146, HL 70146)
  • National Institute of General Medical Sciences (T32GM008361, T32 GM 08361, GM55792)
  • National Institute of Biomedical Imaging and Bioengineering (EB001980, P41EB001980)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Epidemiology › Sepsis Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
sepsis, nitric oxide, erythrocytes, S-nitrosohemoglobin, nitroxyl, vasodilation, endotoxemia, septic shock, hypotension, inducible nitric oxide synthase, plasma nitrite, glutathione, acute inflammation
MeSH terms
Acute Disease, Animals, Cecum, Disease Models, Animal, Erythrocytes, Hemoglobins, Ligation, Lipopolysaccharides, Male, Nitric Oxide, Nitrites, Oxygen, Vasodilation, Wounds, Stab, Rats, Sprague-Dawley, Sepsis, Nitric Oxide Synthase, Rats, Nitric Oxide Synthase Type II

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