Cited by 91Garlic and Onion StudiesNatural Antidiabetic Agents StudiesAntioxidant Activity and Oxidative Stress

Garlic increases antioxidant levels in diabetic and hypertensive rats determined by a modified peroxidase method

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Drobiova, Hana, Thomson, Martha, Al-Qattan, Khaled, Peltonen-Shalaby, Riitta, Al-Amin, Zainab, Ali, Muslim·2011·Evidence-Based Complementary and Alternative Medicine

Abstract

Oxidative damage by free radicals has been implicated in the pathogenesis of vascular disease in diabetes and hypertension. In the present study, the total antioxidant status in diabetic and hypertensive rats before and after treatment with garlic (Allium sativum) was determined. The total serum antioxidants were measured by a modified method reported earlier by Miller and coworkers. The reproducibility of the assay was confirmed by determining standard curves for the known antioxidants: trolox (a stable analog of vitamin E), glutathione and vitamin C with interassay correlation coefficients (R 2, n = 10 in triplicate) of 0.9984, 0.9768 and 0.987, respectively, confirming the reliability and reproducibility of the assay. This assay was then used to determine total serum antioxidant levels of streptozotocin‐induced diabetic rats and two‐kidney one‐clip hypertensive rats both before and after 3 weeks of treatment with an aqueous extract of garlic (500 mg/kg IP daily). The serum antioxidant levels of rats after 3 weeks of treatment were significantly higher (P < .001) than the pretreatment levels in both diabetic and hypertensive rats. The increased serum antioxidant levels were paralleled by a decrease in serum glucose in the garlic‐treated diabetic rats and lowered systolic blood pressure in the garlic‐treated hypertensive rats. We conclude from our study that (i) total antioxidants can be measured by a simple, reproducible, reliable assay and (ii) the total antioxidant status can be significantly improved by treatment with garlic.

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  • Garlic formulations have been broadly used to inhibit and relieve cardiovascular disorders such as hypertension, arrhythmia, thrombosis, hyperlipidemia, and atherosclerosis.

    “Garlic formulations have been broadly used to inhibit and relieve cardiovascular disorders such as hypertension, arrhythmia, thrombosis, hyperlipidemia, and atherosclerosis [19,120].”
  • Garlic administration at a dose of 100 mg/kg for 5 days resulted in complete prevention of acute hypoxic pulmonary vasoconstriction caused by endothelin-1 in isolated rat pulmonary arteries, acting by reducing endothelin 1 and angiotensin II production.

    “Garlic administration at a dose of 100 mg/kg for 5 days resulted in complete prevention of acute hypoxic pulmonary vasoconstriction caused by endothelin-1 in isolated rat pulmonary arteries and they found that garlic acts by reducing endothelin 1 and angiotensin II production [120].”

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Authors
Drobiova, H., Thomson, M., Al-Qattan, K., Peltonen-Shalaby, R., Al-Amin, Z., & Ali, M.
Affiliations
Kuwait University (KW)
Corresponding author
Thomson, Martha
Venue
Evidence-Based Complementary and Alternative Medicine
Publisher
Wiley
Published
2010-10-20
Volume
2011
Issue
1
Pages
703049-703049
ISSN
  • 1741-427X (ISSN-L)
  • 1741-4288
OpenAlex
W2006528374
Cited by
91
References
72
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 7 · 2022: 7 · 2021: 6 · 2020: 5 · 2019: 6 · 2018: 4 · 2017: 2 · 2016: 4 · 2015: 8 · 2014: 2 · 2013: 8 · 2012: 10
FWCI
8.90
Type
journal article
Language
en
Open access
Locations
  • Evidence-based Complementary and Alternative Medicine (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
College of Graduate Studies, Kuwait University
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Garlic and Onion Studies
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
garlic, total antioxidant status, oxidative stress, diabetes mellitus, hypertension, streptozotocin-induced diabetes, two-kidney one-clip hypertension, serum antioxidants, serum glucose, blood pressure, vascular disease

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