Evidence for enhanced vascular superoxide anion production in nitrate tolerance. A novel mechanism underlying tolerance and cross-tolerance.
نویسندگان
چکیده
منابع مشابه
Combating nitrate tolerance: a novel endogenous mechanism.
With glycerol trinitrate (GTN) as the prototype, nitrates represent one of the safest and most rapidly effective pharmacological means to reduce acute symptoms of myocardial ischemia attributable to obstructive coronary disease. This has led, over the years, to the development of long-acting oral and topical preparations. However, efficacy with chronic administration is more difficult to achiev...
متن کاملEffects of a nitrate-free interval on tolerance, vasoconstrictor sensitivity and vascular superoxide production.
OBJECTIVES In the present study, we tested whether a nitrate-free interval is able to prevent increases in vascular superoxide (O2*-) and the development of hypersensitivity to vasoconstrictors and whether this may result in restoration of vascular nitroglycerin (NTG) sensitivity. BACKGROUND Intermittent NTG-patch treatment (12 h patch on/patch-off) has been shown to increase ischemic periods...
متن کاملVascular peroxynitrite formation during organic nitrate tolerance.
Nitroglycerin (NTG) is an important cardiovascular agent, but tolerance during continuous administration limits its clinical utility. Increased vascular superoxide production may mediate nitrate tolerance via a reduction in nitric oxide availability. Because superoxide anion and nitric oxide react avidly to form peroxynitrite, an aggressive cellular toxicant that nitrates protein tyrosine resid...
متن کاملAntioxidants and nitrate tolerance.
authors and five references. They should not have tables or figures and should relate solely to an article published in Circulation within the preceding 12 weeks. Only some letters will be published. Authors of those selected for publication will receive prepublication proofs, and authors of the article cited in the letter will be invited to reply. Replies must be signed by all authors listed i...
متن کاملNitroglycerin and Nitrate Tolerance
Background. The present study was designed to investigate the intracellular production of cyclic GMP (cGMP) in platelets in response to nitroglycerin and to determine the potential clinical value of platelet cGMP as an indicator of the effects of nitroglycerin and nitrate tolerance. Methods and Results. Platelet cGMP levels and the diameters of the coronary arteries before and 2 minutes after i...
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ژورنال
عنوان ژورنال: Journal of Clinical Investigation
سال: 1995
ISSN: 0021-9738
DOI: 10.1172/jci117637