Cited by 114Nitric Oxide and Endothelin EffectsPlatelet Disorders and TreatmentsAntiplatelet Therapy and Cardiovascular Diseases

Antiplatelet effects of dietary nitrate in healthy volunteers: Involvement of cGMP and influence of sex

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Velmurugan, Shanti, Kapil, Vikas, Ghosh, Suborno M., Davies, Sheridan, McKnight, Andrew, Aboud, Zainab, Khambata, Rayomand S., Webb, Andrew J. +2 more·2013·Free Radical Biology and Medicine

Abstract

Ingestion of vegetables rich in inorganic nitrate has emerged as an effective method, via the formation of a nitrite intermediate, for acutely elevating vascular NO levels. As such a number of beneficial effects of dietary nitrate ingestion have been demonstrated including the suggestion that platelet reactivity is reduced. In this study we investigated whether inorganic nitrate supplementation might also reduce platelet reactivity in healthy volunteers and have determined the mechanisms involved in the effects seen. We conducted two randomised crossover studies each in 24 (12 of each sex) healthy subjects assessing the acute effects of dietary nitrate (250 ml beetroot juice) or potassium nitrate capsules (KNO3, 8 mmol) vs placebo control on platelet reactivity. Inorganic nitrate ingested either from a dietary source or via supplementation raised circulating nitrate and nitrite levels in both sexes and attenuated ex vivo platelet aggregation responses to ADP and, albeit to a lesser extent, collagen but not epinephrine in male but not female volunteers. These inhibitory effects were associated with a reduced platelet P-selectin expression and elevated platelet cGMP levels. In addition, we show that nitrite reduction to NO occurs at the level of the erythrocyte and not the platelet. In summary, our results demonstrate that inorganic nitrate ingestion, whether via the diet or through supplementation, causes a modest decrease in platelet reactivity in healthy males but not females. Our studies provide strong support for further clinical trials investigating the potential of dietary nitrate as an adjunct to current antiplatelet therapies to prevent atherothrombotic complications. Moreover, our observations highlight a previously unknown sexual dimorphism in platelet reactivity to NO and intimate a greater dependence of males on the NO-soluble guanylate cyclase pathway in limiting thrombotic potential.

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Authors
Velmurugan, S., Kapil, V., Ghosh, S. M., Davies, S., McKnight, A., Aboud, Z., Khambata, R. S., Webb, A. J., Poole, A., & Ahluwalia, A.
Affiliations
  • Queen Mary University of London (GB)
  • University of Bristol (GB)
Corresponding author
Ahluwalia, Amrita
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2013-12
Volume
65
Pages
1521-1532
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2028916136
Cited by
114
References
60
Citations by year
2026: 3 · 2025: 4 · 2024: 4 · 2023: 6 · 2022: 7 · 2021: 7 · 2020: 5 · 2019: 8 · 2018: 15 · 2017: 9 · 2016: 18 · 2015: 10 · 2014: 15 · 2013: 2
FWCI
10.42
Type
journal article
Language
en
Update notices
erratum (2015-07-01)
Open access
Locations
  • Free Radical Biology and Medicine (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion, other-oa)
Funders
  • British Heart Foundation (FS/11/41/28749)
  • Medical Research Council
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Antiplatelet Therapy and Cardiovascular Diseases
Keywords
dietary nitrate, inorganic nitrate supplementation, platelet reactivity, platelet aggregation, nitric oxide, cyclic GMP, soluble guanylate cyclase, nitrite reduction, erythrocytes, P-selectin, sex differences, beetroot juice, potassium nitrate, atherothrombosis, antiplatelet therapy
MeSH terms
Adolescent, Adult, Blood Platelets, Cardiovascular Diseases, Collagen, Diet, Epinephrine, Erythrocytes, Female, Cyclic GMP, Guanylate Cyclase, Humans, Male, Middle Aged, Nitrates, Nitric Oxide, Platelet Aggregation, Platelet Aggregation Inhibitors, Sex Factors, Vegetables, Potassium Compounds, Cross-Over Studies, P-Selectin, Dietary Supplements, Beta vulgaris, Young Adult

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