The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Antioxidant Vitamin C Improves Endothelial Dysfunction in Chronic Smokers
Abstract
Background Chronic smoking is associated with endothelial dysfunction, an early stage of atherosclerosis. It has been suggested that endothelial dysfunction may be a consequence of enhanced degradation of nitric oxide secondary to formation of oxygen-derived free radicals. To test this hypothesis, we investigated the effects of the antioxidant vitamin C on endothelium-dependent responses in chronic smokers. Methods and Results Forearm blood flow responses to the endothelium-dependent vasodilator acetylcholine (7.5, 15, 30, and 60 μg/min) and the endothelium-independent vasodilator sodium nitroprusside (1, 3, and 10 μg/min) were measured by venous occlusion plethysmography in 10 control subjects and 10 chronic smokers. Drugs were infused into the brachial artery, and forearm blood flow was measured for each drug before and during concomitant intra-arterial infusion of the antioxidant vitamin C (18 mg/min). In control subjects, vitamin C had no effect on forearm blood flow in response to acetylcholine and sodium nitroprusside. In contrast, in chronic smokers the attenuated forearm blood flow responses to acetylcholine were markedly improved by concomitant administration of vitamin C, whereas the vasodilator responses to sodium nitroprusside were not affected. Conclusions The present studies demonstrate that the antioxidant vitamin C markedly improves endothelium-dependent responses in chronic smokers. This observation supports the concept that endothelial dysfunction in chronic smokers is at least in part mediated by enhanced formation of oxygen-derived free radicals.
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“As the treatment with antioxidants has been shown to improve endothelial function in certain conditions (56, 419, 420, 422, 572), it is possible that the coadministration of BH4 with ascorbic acid or other antioxidants can circumvent these issues.”
From Sources of Vascular Nitric Oxide and Reactive Oxygen Species and Their Regulation (2019) · cites this paper as [420]
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Metadata
- Authors
- Heitzer, T., Just, H., & Mu¨nzel, T.
- Affiliations
- University of Freiburg (DE)
- the Medizinische Klinik III, Kardiologie, Universita¨t Freiburg, Germany.
- Venue
- Circulation
- Published
- 1996-07
- Volume
- 94
- Issue
- 1
- Pages
- 6-9
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W1963495254
- Cited by
- 554
- References
- 25
- Citations by year
- 2026: 3 · 2025: 4 · 2024: 6 · 2023: 9 · 2022: 3 · 2021: 11 · 2020: 10 · 2019: 10 · 2018: 9 · 2017: 8 · 2016: 8 · 2015: 14 · 2014: 13 · 2013: 14 · 2012: 11
- FWCI
- 22.29
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Circulation (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology (medical) › Nitric Oxide and Endothelin Effects
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
- Health Sciences › Medicine › Biochemistry (medical) › Antioxidant Activity and Oxidative Stress
- Keywords
- vitamin C, antioxidant therapy, endothelial dysfunction, chronic smoking, acetylcholine, sodium nitroprusside, forearm blood flow, nitric oxide degradation, oxygen free radicals, atherosclerosis, endothelium-dependent vasodilation
- MeSH terms
- Acetylcholine, Antioxidants, Ascorbic Acid, Endothelium, Vascular, Forearm, Humans, Injections, Intra-Arterial, Middle Aged, Nitroprusside, Reference Values, Regional Blood Flow, Smoking, Time Factors
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