Related Experiment Videos
The nitrovasodilators. New ideas about old drugs
1Department of Internal Medicine, Emory University School of Medicine, Atlanta, GA 30322.
Circulation
|May 1, 1993
Summary
Nitrovasodilators release nitric oxide via different mechanisms. Nitroglycerin targets larger coronary arteries, preventing adverse effects like coronary steal.
Area of Science:
- Pharmacology
- Vascular Biology
- Medicinal Chemistry
Background:
- Nitrovasodilators are drugs that induce vascular relaxation through nitric oxide (NO) release.
- Mechanisms of NO release vary based on chemical structure and nitrogen oxidation state.
Purpose of the Study:
- To review the mechanisms of NO release from nitrovasodilators, focusing on nitroglycerin.
- To discuss recent studies on nitroglycerin bioconversion in coronary vessels.
Main Methods:
- Review of existing literature on nitrovasodilator mechanisms.
- Analysis of studies investigating nitroglycerin bioconversion in coronary circulation.
Main Results:
- Lower oxidation state compounds (e.g., nitroprusside) release NO nonenzymatically.
- Organic nitrates like nitroglycerin release NO via an enzymatic process, primarily in vascular tissues.
- Nitroglycerin preferentially dilates larger coronary arteries, avoiding coronary steal.
Conclusions:
- Nitroglycerin's enzymatic NO release mechanism offers targeted vasodilation.
- Understanding nitroglycerin bioconversion is crucial for its therapeutic application in cardiovascular conditions.