Molecular Biology Reports

, Volume 39, Issue 3, pp 2789–2794

The protective effect of quercetin on long-term alcohol consumption-induced oxidative stress


DOI: 10.1007/s11033-011-1037-2

Cite this article as:
Kahraman, A., Çakar, H. & Köken, T. Mol Biol Rep (2012) 39: 2789. doi:10.1007/s11033-011-1037-2


Long-term alcohol consumption can cause oxidative stress and cytokines induction, which are associated with free radicals. Quercetin, one of the most widely distributed flavonoids in plants, is a natural antioxidant. We investigated the hypothesis that quercetin could prevent the ethanol-induced oxidative stress and decreases tumor necrosis factor-α (TNF-α) and interferon-γ (INF-γ) as pro-inflammatory cytokines. Twenty-eight rats were randomly divided into control group (C), ethanol treatment group (EtOH) (~1 ml/day, 80%; 2 g/kg body wt), intragastrically (i.g.), quercetin treatment group (Q), (100 mg/kg-body wt per 3 days) i.g. and ethanol plus quercetin treatment group (EtOH + Q) (1 ml/day, 80% of ethanol and 100 mg/kg-body wt of quercetin per 3 days) i.g. for 30 days Plasma thiobarbituric acid reactive substance (TBARS) levels and protein carbonyl content were significantly higher in the EtOH group than the C group (P < 0.01). On the other hand, TBARS level and protein carbonyl content in the EtOH + Q group was decreased significantly by quercetin (P < 0.05, P < 0.01; respectively). While GSH levels in whole blood decreased in EtOH group compared to C group, they increased significantly by quercetin (P < 0.05). Plasma ALT, TNF-α and IFN-γ levels increased significantly in the EtOH group compared to control group (P < 0.05, P < 0.01, P < 0.01, respectively), but they decreased significantly in the EtOH + Q group in comparison with EtOH group (P < 0.05, P < 0.01, P < 0.01, respectively). Our results demonstrate that quercetin treatment may provide a protection as reflected by decreased plasma TBARS, protein carbonyls, TNF-α, INF-γ and ALT levels against ethanol-induced oxidative damage.


EthanolQuercetinOxidative stressTNF-αINF-γ

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Ahmet Kahraman
    • 1
  • Hamdullah Çakar
    • 1
  • Tülay Köken
    • 1
  1. 1.Department of Biochemistry, School of MedicineAfyon Kocatepe UniversityAfyonkarahisarTurkey