Cited by 53Nitric Oxide and Endothelin EffectsCardiac Ischemia and ReperfusionAcute Myocardial Infarction Research

Depletion of circulating blood NOS3 increases severity of myocardial infarction and left ventricular dysfunction

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Merx, Marc W., Gorressen, Simone, Sandt, Annette M., Cortese-Krott, Miriam M., Ohlig, Jan, Stern, Manuel, Rassaf, Tienush, Gödecke, Axel +2 more·2014·Basic Research in Cardiology

Abstract

Nitric oxide (NO) derived from endothelial NO synthase (NOS3) plays a central role in myocardial ischemia/reperfusion (I/R)-injury. Subsets of circulating blood cells, including red blood cells (RBCs), carry a NOS3 and contribute to blood pressure regulation and RBC nitrite/nitrate formation. We hypothesized that the circulating blood born NOS3 also modulates the severity of myocardial infarction in disease models. We cross-transplanted bone marrow in wild-type and NOS3(-/-) mice with wild-type mice, producing chimeras expressing NOS3 only in vascular endothelium (BC-/EC+) or in both blood cells and vascular endothelium (BC+/EC+). After 60-min closed-chest coronary occlusion followed by 24 h reperfusion, cardiac function, infarct size (IS), NOx levels, RBCs NO formation, RBC deformability, and vascular reactivity were assessed. At baseline, BC-/EC+ chimera had lower nitrite levels in blood plasma (BC-/EC+: 2.13 ± 0.27 μM vs. BC+/EC+ 3.17 ± 0.29 μM; *p < 0.05), reduced DAF FM associated fluorescence within RBCs (BC-/EC+: 538.4 ± 12.8 mean fluorescence intensity (MFI) vs. BC+/EC+: 619.6 ± 6.9 MFI; ***p < 0.001) and impaired erythrocyte deformability (BC-/EC+: 0.33 ± 0.01 elongation index (EI) vs. BC+/EC+: 0.36 ± 0.06 EI; *p < 0.05), while vascular reactivity remained unaffected. Area at risk did not differ, but infarct size was higher in BC-/EC+ (BC-/EC+: 26 ± 3 %; BC+/EC+: 14 ± 2 %; **p < 0.01), resulting in decreased ejection fraction (BC-/EC+ 46 ± 2 % vs. BC+/EC+: 52 ± 2 %; *p < 0.05) and increased end-systolic volume. Application of the NOS inhibitor S-ethylisothiourea hydrobromide was associated with larger infarct size in BC+/EC+, whereas infarct size in BC-/EC+ mice remained unaffected. Reduced infarct size, preserved cardiac function, NO levels in RBC and RBC deformability suggest a modulating role of circulating NOS3 in an acute model of myocardial I/R in chimeric mice.

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Authors
Merx, M. W., Gorressen, S., Sandt, A. M., Cortese-Krott, M. M., Ohlig, J., Stern, M., Rassaf, T., Gödecke, A., Gladwin, M. T., & Kelm, M.
Affiliations
  • Düsseldorf University Hospital (DE)
  • Heinrich Heine University Düsseldorf (DE)
  • University of Pittsburgh (US)
Corresponding author
Merx, Marc W.
Venue
Basic Research in Cardiology
Published
2013-12-18
Volume
109
Issue
1
Pages
398-398
ISSN
  • 0003-9217 (ISSN-L)
  • 0300-8428
  • 1435-1803
OpenAlex
W2067838633
Cited by
53
References
52
Citations by year
2026: 1 · 2025: 2 · 2024: 5 · 2023: 3 · 2022: 3 · 2021: 4 · 2020: 7 · 2019: 6 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 3 · 2014: 3
FWCI
2.78
Type
journal article
Language
en
Open access
Locations
  • Basic Research in Cardiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (R01HL098032)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Acute Myocardial Infarction Research
Keywords
endothelial nitric oxide synthase, NOS3, myocardial infarction, myocardial ischemia-reperfusion injury, erythrocytes, nitrite/nitrate, erythrocyte deformability, infarct size, left ventricular dysfunction, bone marrow chimeras, nitric oxide signaling, vascular reactivity, nitric oxide donors
MeSH terms
Animals, Disease Models, Animal, Male, Mice, Inbred C57BL, Myocardial Infarction, Nitric Oxide, Blotting, Western, Myocardial Reperfusion Injury, Transplantation Chimera, Mice, Knockout, Ventricular Dysfunction, Left, Mice, Nitric Oxide Synthase Type III

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