Cited by 343Nitric Oxide and Endothelin EffectsLipoproteins and Cardiovascular HealthCardiovascular Health and Disease Prevention

Pravastatin sodium activates endothelial nitric oxide synthase independent of its cholesterol-lowering actions

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Kaesemeyer, Wayne H., Caldwell, Ruth B., Huang, Jianzhong, Caldwell, R.William·1999·Journal of the American College of Cardiology

Abstract

Objectives We tested the hypothesis that pravastatin (PRA) activates endothelial nitric oxide synthase (eNOS).Background Pravastatin has been found to have clinical benefits beyond those predicted by its actions in reducing plasma low density lipoprotein cholesterol (LDL). Both PRA and simvastatin (SIM) are equally effective in reducing LDL, but only PRA reduces platelet aggregation and is an effective vasodilator. Nitric oxide (NO) also inhibits platelet aggregation and vasodilates.Methods We determined PRA and SIM effects on vasorelaxation in aortic rings and NO production by cultured bovine aortic endothelial cells. Nitric oxide was measured by using a NO electrode and by an assay for conversion of hemoglobin to methemoglobin. Specificity of NOS activation was tested by using the NOS inhibitor nitro-L-arginine methyl ester (L-NAME, 1 mmol/liter) in the presence or absence of excess L-arginine (L-ARG, 1 mmol/liter).Results Endothelium-dependent vasorelaxation was maximal with acetylocholine (ACH, 100%), followed by PRA (62.8%) and then SIM (37.1%). Direct measurement of NO confirmed that vasorelaxation is due to NO release and showed that PRA and ACH had similar dose-dependent effects on NO production, while SIM was only 25% to 30% as effective. Methemoglobin assay confirmed these results and demonstrated their specificity for NOS activity. The L-NAME blunted the responses to 45% of initial values. Excess L-ARG reversed this effect and potentiated NO production to 133% of initial levels.Conclusions Both PRA and SIM activate eNOS, but SIM is much less effective. Clinical benefits with PRA not explained by LDL reductions may be the result of an independent action of PRA on eNOS activation.

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Crossref · 10.1016/s0735-1097(98)00514-2

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  1. Kaesemeyer WH, Abou-Mohamed G, Crute TD, Caldwell RW. Nitrates supplemented with L-arginine for the reversal and treatment of nitrate tolerance: two case reports. Appl Cardiopulmon Pathophys 1997;6:255-62.

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Authors
Kaesemeyer, W. H., Caldwell, R. B., Huang, J., & Caldwell, R. W.
Affiliations
Augusta University (US)
Corresponding author
Kaesemeyer, Wayne H.
Venue
Journal of the American College of Cardiology
Publisher
Elsevier BV
Published
1999-01
Volume
33
Issue
1
Pages
234-241
ISSN
0735-1097 (ISSN-L)
OpenAlex
W2169537677
Cited by
343
References
38
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 3 · 2021: 3 · 2020: 3 · 2019: 4 · 2018: 6 · 2017: 8 · 2016: 8 · 2015: 7 · 2014: 8 · 2013: 10 · 2012: 9
FWCI
19.26
Type
journal article
Language
en
Open access
Locations
  • Journal of the American College of Cardiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Bristol-Myers Squibb
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
pravastatin, simvastatin, endothelial nitric oxide synthase, nitric oxide, endothelium-dependent relaxation, platelet aggregation, vasodilation, L-NAME, L-arginine, statins, LDL cholesterol lowering, aortic endothelial cells
MeSH terms
Animals, Anticholesteremic Agents, Cattle, Endothelium, Vascular, Enzyme Activation, Cholesterol, LDL, Male, Platelet Aggregation, Vasodilation, Pravastatin, Rats, Sprague-Dawley, Nitric Oxide Synthase, Culture Techniques, Rats, Nitric Oxide Synthase Type III

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