Cited by 473Adipokines, Inflammation, and Metabolic DiseasesNatural Antidiabetic Agents StudiesPhytochemicals and Antioxidant Activities

Quercetin ameliorates metabolic syndrome and improves the inflammatory status in obese Zucker rats

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Rivera, Leonor, Morón, Rocío, Sánchez, Manuel, Zarzuelo, Antonio, Galisteo, Milagros·2008·Obesity

Abstract

The aim of this study was to analyze the effects of chronic administration of high doses of quercetin on metabolic syndrome abnormalities, including obesity, dyslipidemia, hypertension, and insulin resistance. For this purpose, obese Zucker rats and their lean littermates were used. The rats received a daily dose of quercetin (2 or 10 mg/kg of body weight) or vehicle for 10 weeks. Body weight and systolic blood pressure (SBP) were recorded weekly. At the end of the treatment, plasma concentrations of triglycerides, total cholesterol, free-fatty acids (FFAs), glucose, insulin, adiponectin, and nitrate plus nitrite (NOx) were determined. Tumor necrosis factor-alpha (TNF-alpha) production, inducible nitric oxide synthase (iNOS), and endothelial nitric oxide synthase (eNOS) protein expression were analyzed in visceral adipose tissue (VAT). The raised SBP and high plasma concentrations of triglycerides, total cholesterol, FFA, and insulin found in obese Zucker rats were reduced in obese rats that received either of the doses of quercetin assayed. The higher dose also improved the inflammatory status peculiar to this model, as it increased the plasma concentration of adiponectin, reduced NOx levels in plasma, and lowered VAT TNF-alpha production in obese Zucker rats. Furthermore, chronic intake of the higher dose of quercetin enhanced VAT eNOS expression among obese Zucker rats, whereas it downregulated VAT iNOS expression. In conclusion, both doses of quercetin improved dyslipidemia, hypertension, and hyperinsulinemia in obese Zucker rats, but only the high dose produced antiinflammatory effects in VAT together with a reduction in body weight gain.

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Crossref · 10.1038/oby.2008.315

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Authors
Rivera, L., Morón, R., Sánchez, M., Zarzuelo, A., & Galisteo, M.
Affiliations
Universidad de Granada (ES)
Corresponding author
Galisteo, Milagros
Venue
Obesity
Publisher
Wiley
Published
2008-09
Volume
16
Issue
9
Pages
2081-2087
ISSN
  • 1930-7381 (ISSN-L)
  • 1930-739X
OpenAlex
W2093497534
Cited by
473
References
41
Citations by year
2026: 20 · 2025: 15 · 2024: 27 · 2023: 28 · 2022: 30 · 2021: 21 · 2020: 41 · 2019: 36 · 2018: 25 · 2017: 24 · 2016: 27 · 2015: 22 · 2014: 38 · 2013: 35 · 2012: 32
FWCI
12.87
Type
journal article
Language
en
Open access
Locations
  • Obesity (publishedVersion)
  • PubMed (publishedVersion)
Funders
Instituto de Salud Carlos III (Red HERACLES RD06/0009, RD 06/0009)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
  • Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
Keywords
quercetin, metabolic syndrome, Zucker rats, dyslipidemia, hypertension, insulin resistance, adiponectin, nitric oxide, inflammation, visceral adipose tissue, TNF-α, inducible nitric oxide synthase, endothelial nitric oxide synthase, hyperinsulinemia, weight gain
MeSH terms
Adipose Tissue, Animals, Antioxidants, Blood Glucose, Blood Pressure, Body Weight, Eating, Fatty Acids, Nonesterified, Insulin, Male, Nitric Oxide, Obesity, Quercetin, Rats, Zucker, Triglycerides, Tumor Necrosis Factor-alpha, Metabolic Syndrome, Rats, Adiponectin, Nitric Oxide Synthase Type II, Nitric Oxide Synthase Type III

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