Cited by 160Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressProtein Kinase Regulation and GTPase Signaling

Induction of Endothelial NO Synthase by Hydrogen Peroxide via a Ca 2+ /Calmodulin-Dependent Protein Kinase II/Janus Kinase 2–Dependent Pathway

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Cai, Hua, Davis, Michael E., Drummond, Grant R., Harrison, David G.·2001·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

We have recently demonstrated that hydrogen peroxide (H 2 O 2 ) is an extremely potent stimulus of endothelial NO synthase (eNOS) gene expression. The present study was designed to identify the signaling mechanisms mediating this response. Induction of eNOS expression by H 2 O 2 was found to be Ca 2+ dependent, inasmuch as it was blocked by BAPTA-AM. Further studies have indicated that Ca 2+ /calmodulin-dependent protein kinase II (CaM kinase II) plays a critical role in mediating this response. Immunocytochemical staining with an anti-CaM kinase II antibody confirmed the expression of CaM kinase II in cultured bovine aortic endothelial cells. H 2 O 2 induced autophosphorylation of CaM kinase II and increased the activity of the enzyme, as assessed by an in-gel kinase assay. A specific inhibitor for CaM kinase II, KN93, and a calmodulin antagonist, W-7, attenuated eNOS induction by H 2 O 2 . Further studies have indicated that janus kinase 2 is important in mediating increased eNOS expression in response to H 2 O 2 and likely is downstream from CaM kinase II. In conclusion, these data provide the first evidence that CaM kinase II plays a critical role in endothelial redox signaling. Regulation of eNOS via this pathway may represent an important vascular adaptation to oxidant stress.

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Authors
Cai, H., Davis, M. E., Drummond, G. R., & Harrison, D. G.
Affiliations
Emory University (US)
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2001-10
Volume
21
Issue
10
Pages
1571-1576
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2040801242
Cited by
160
References
34
Citations by year
2026: 3 · 2025: 2 · 2024: 8 · 2023: 4 · 2022: 3 · 2021: 5 · 2020: 3 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 8 · 2015: 6 · 2014: 5 · 2013: 8 · 2012: 14
FWCI
6.88
Type
journal article
Language
en
Open access
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • National Institutes of Health (5r01hl059248-04)
  • National Heart, Lung, and Blood Institute (HL 58000, HL 59248, HL 39000 6, P01HL058000)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
endothelial nitric oxide synthase, hydrogen peroxide, calcium/calmodulin-dependent protein kinase II, JAK2, oxidative stress, eNOS gene expression, autophosphorylation, calmodulin, KN-93, W-7, bovine aortic endothelial cells
MeSH terms
Benzenesulfonamides, Animals, Benzylamines, Calcium, Cattle, Cells, Cultured, Endothelium, Vascular, Enzyme Inhibitors, Hydrogen Peroxide, Protein-Tyrosine Kinases, Proto-Oncogene Proteins, RNA, Messenger, Sulfonamides, Signal Transduction, Transcriptional Activation, Calcium-Calmodulin-Dependent Protein Kinases, Nitric Oxide Synthase, Nitric Oxide Synthase Type III, Janus Kinase 2, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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