Cited by 424Nitric Oxide and Endothelin EffectsEicosanoids and Hypertension PharmacologyCardiovascular Health and Disease Prevention

Explaining the Phenomenon of Nitrate Tolerance

Münzel, Thomas, Daiber, Andreas, Mülsch, Alexander·2005·Circulation Research

Abstract

During the last century, nitroglycerin has been the most commonly used antiischemic and antianginal agent. Unfortunately, after continuous application, its therapeutic efficacy rapidly vanishes. Neurohormonal activation of vasoconstrictor signals and intravascular volume expansion constitute early counter-regulatory responses (pseudotolerance), whereas long-term treatment induces intrinsic vascular changes, eg, a loss of nitrovasodilator-responsiveness (vascular tolerance). This is caused by increased vascular superoxide production and a supersensitivity to vasoconstrictors secondary to a tonic activation of protein kinase C. NADPH oxidase(s) and uncoupled endothelial nitric oxide synthase have been proposed as superoxide sources. Superoxide and vascular NO rapidly form peroxynitrite, which aggravates tolerance by promoting NO synthase uncoupling and inhibition of soluble guanylyl cyclase and prostacyclin synthase. This oxidative stress concept may explain why radical scavengers and substances, which reduce oxidative stress indirectly, are able to relieve tolerance and endothelial dysfunction. Recent work has defined a new tolerance mechanism, ie, an inhibition of mitochondrial aldehyde dehydrogenase, the enzyme that accomplishes bioactivation of nitroglycerin, and has identified mitochondria as an additional source of reactive oxygen species. Nitroglycerin-induced reactive oxygen species inhibit the bioactivation of nitroglycerin by thiol oxidation of aldehyde dehydrogenase. Both mechanisms, increased oxidative stress and impaired bioactivation of nitroglycerin, can be joined to provide a new concept for nitroglycerin tolerance and cross-tolerance. The consequences of these processes for the nitroglycerin downstream targets soluble guanylyl cyclase, cGMP-dependent protein kinase, cGMP-degrading phosphodiesterases, and toxic side effects contributing to endothelial dysfunction, such as inhibition of prostacyclin synthase, are discussed in this review.

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Crossref · 10.1161/01.res.0000184694.03262.6d

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Authors
Münzel, T., Daiber, A., & Mülsch, A.
Affiliations
  • From the Johannes Gutenberg Universität, II. Medizinische Klinik und Poliklinik, Kardiologie, Mainz, Germany.
  • Johannes Gutenberg University Mainz (DE)
Venue
Circulation Research
Published
2005-09-30
Volume
97
Issue
7
Pages
618-628
ISSN
  • 0009-7330 (ISSN-L)
  • 1524-4571
OpenAlex
W2116403540
Cited by
424
References
186
Citations by year
2026: 7 · 2025: 4 · 2024: 12 · 2023: 13 · 2022: 13 · 2021: 14 · 2020: 19 · 2019: 9 · 2018: 18 · 2017: 22 · 2016: 32 · 2015: 21 · 2014: 16 · 2013: 23 · 2012: 35
FWCI
3.18
Type
journal article
Language
en
Open access
closed
Locations
  • Circulation Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
nitroglycerin tolerance, nitrate tolerance, nitrate
MeSH terms
Aldehyde Dehydrogenase, Mitochondrial, Aldehyde Dehydrogenase, Animals, Biotransformation, Drug Tolerance, Endothelium, Vascular, Nitroglycerin, Humans, Nitric Oxide, Phosphoric Diester Hydrolases, Superoxides, Vasoconstriction, Vasodilation, Vasodilator Agents, Signal Transduction, Reactive Oxygen Species, Cyclic GMP-Dependent Protein Kinases, Oxidative Stress, Peroxynitrous Acid, Cyclic Nucleotide Phosphodiesterases, Type 1

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