Hepatoprotective effects of Micromeria croatica ethanolic extract against CCl 4–induced liver injury in mice

BMC Complementary and Alternative Medicine

Robert Domitrović¹  Maja Bival Štefan³  Marija Kindl³  Biljana Blažeković³  Olga Cvijanović²  Sanda Vladimir-Knežević³ 

[1] Department of Chemistry and Biochemistry, School of Medicine, University of Rijeka, B. Branchetta 20, Rijeka, 51000, Croatia;Department of Anatomy, School of Medicine, University of Rijeka, Rijeka, Croatia;Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia

关键词: Liver fibrosis;    Inflammation;    Oxidative stress;    Hepatoprotection;    Micromeria croatica;   

Others  :  1220000
DOI  :  10.1186/s12906-015-0763-8

 received in 2014-11-12, accepted in 2015-07-02,  发布年份 2015

【 摘 要 】

Background

Micromeria croatica (Pers.) Schott is an aromatic plant from Lamiaceae family previously found to possess potent in vitro antioxidant activity which is mainly attributed to the high level of polyphenolic substances. The aim of this study was to investigate the hepatoprotective activity and possible underlying mechanisms of Micromeria croatica ethanolic extract (MC) using a model of carbon tetrachloride (CCl ₄ )-induced liver injury in mice.

Methods

Male BALB/cN mice were randomly divided into seven groups: control group received saline, MC group received ethanolic extract of M. croatica in 5 % DMSO (100 mg/kg b.w., p.o.), and CCl ₄group was administered CCl ₄dissolved in corn oil (2 mL/kg, 10 % v/v, ip). MC50, MC200 and MC400 groups were treated with MC orally at doses of 50, 200 and 400 mg/kg once daily for 2 consecutive days, respectively, 6 h after CCl ₄intoxication. The reference group received silymarin at dose of 400 mg/kg. At the end of experiment, blood and liver samples were collected for biochemical, histopathological, immunohistochemical and Western blot analyses. In addition, major phenolic compounds in MC were quantified by HPLC-DAD.

Results

CCl ₄intoxication resulted in liver cells damage and oxidative stress and triggered inflammatory response in mice livers. MC treatment decreased ALT activity and prevented liver necrosis. Improved hepatic antioxidant status was evident by increased Cu/Zn SOD activity and decreased 4-hydroxynonenal (4-HNE) formation in the livers. Concomitantly, nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) were overexpressed. The hepatoprotective activity of MC was accompanied by the increase in nuclear factor-kappaB (NF-κB) activation and tumor necrosis factor-alpha (TNF-α) expression, indicating amelioration of hepatic inflammation. Additionally, MC prevented tumor growth factor-β1 (TGF-β1) and α-smooth muscle actin (α-SMA) expression, suggesting the potential for suppression of hepatic fibrogenesis.

Conclusion

These results of the present study demonstrated that MC possesses in vivo antioxidant and anti-inflammatory activity and exhibits antifibrotic potential, which are comparable to those of standard hepatoprotective compound silymarin.

【 授权许可】

   
2015 Vladimir-Knežević et al.

【 图 表 】

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