Quercetin reduces oxidative stress and inhibits activation of c-Jun N-terminal kinase/activator protein-1 signaling in an experimental mouse model of abdominal aortic aneurysm

Oxidative stress is becoming increasingly linked to the pathogenesis of abdominal aortic aneurysms (AAAs). The antioxidant activity of flavonoids has attracted attention for their possible role in the prevention of cardiovascular diseases. The purpose of this study was to determine whether an antioxidant mechanism is involved in the aneurysm formation inhibitory effect afforded by quercetin. Male C57/BL6 mice received quercetin continuously from 2 weeks prior to and 6 weeks following the AAA induction with extraluminal CaCl2. Quercetin treatment decreased AAA incidence and inhibited the reactive oxygen species generation, nitrotyrosine formation and lipid peroxidation production in the aortic tissue during AAA development. In addition, quercetin-treated mice exhibited significantly lower expression of the p47phox subunit of nicotinamide adenine dinucleotide phosphate oxidase and inducible nitric oxide synthase, as well as coordinated downregulation of manganese-superoxide dismutase activities and glutathione peroxidase (GPx)-1 and GPx-3 expression. Quercetin also blunted the expression of c-Jun N-terminal kinase (JNK) and phospho-JNK and, in addition, diminished activation of the activator protein (AP)-1 transcription factor. Gelatin zymography showed that quercetin eliminated matrix metalloproteinase (MMP)-2 and MMP-9 activation during AAA formation. In conclusion, the inhibitory effects of quercetin on oxidative stress and MMP activation, through modulation of JNK/AP-1 signaling, may partly account for its benefit in CaCl2-induced AAA.

• Publication year

  2013

• Venue

  Molecular Medicine Reports

• Publication date

  2013-12-06

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.3892/mmr.2013.1846PMID 24337353PMCID 3896506
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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