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Polyprenols from Taxus chinensis var. mairei prevent the development of CCl₄-induced liver fibrosis in rats.
J Ethnopharmacol 2012; 142(1):151-60JE

Abstract

ETHNOPHARMACOLOGICAL RELEVANCE

The aim of this study was to investigate the anti-fibrotic effects and the possible underlying mechanisms of taxus polyprenols (TPs) isolated from the needles of Taxus chinensis var. mairei.

MATERIALS AND METHODS

The animals were randomly divided into normal control with vehicles only (olive oil), rat model given CCl₄ only, CCl₄+low TPs (48 mg/kg), CCl₄+medium TPs (120 mg/kg), CCl₄+high TPs (300 mg/kg), and CCl₄+Polyene phosphatidylcholine (PP, 120 mg/kg). The rat model of liver fibrosis was induced by subcutaneous injection of 40% (v/v) of CCl₄ diluted in olive oil (3 mL/kg body weight) twice per week for 8 weeks. Liver histopathological study was performed. Aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase (ALP) and albumin (ALB) of the serum were determined for evaluating the liver function. In order to reveal the possible mechanisms of the anti-fibrotic effects, oxidative stress level, hepatic collagen metabolism, and hepatic stellate cells (HSCs) activation were investigated. Furthermore, the mRNA expression of the fibrotic-related factors was measured by the quantitative real-time RT-PCR.

RESULTS

TPs successfully attenuated liver injury induced by CCl₄ shown by histopathological sections of livers and improved liver function as indicated by decreased ALT, AST and ALP levels and increased ALB levels in serum of the rats. TPs significantly increased the hepatic Cu/Zn SOD and GSH-Px activities along with GSH content while a remarkable decrease in MDA content. Both immunohistochemical staining and mRNA expression levels of α-SMA indicated a profound suppression of HSCs activation. Furthermore, it significantly inhibited the mRNA expression of the pro-fibrotic cytokines Col α1(I), Col α1(Ш), MMP-2, TIMP-1, TIMP-2, PDGF-β, TGF-β1, CTGF and TNF-α and restored the hepatoprotective factor HGF.

CONCLUSION

These results suggest that the protective effects of TPs in chronic CCl₄-induced liver fibrosis might be related with the reduction of oxidative damage, the inhibition of HSCs activation, the down-regulation of pro-fibrogenic stimuli and the protection of hepatocytes.

Authors+Show Affiliations

The Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, College of Life Sciences, Zhejiang University, Yuhangtang Road 388, Hangzhou, Zhejiang 310023, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22543175

Citation

Yu, Jinhui, et al. "Polyprenols From Taxus Chinensis Var. Mairei Prevent the Development of CCl₄-induced Liver Fibrosis in Rats." Journal of Ethnopharmacology, vol. 142, no. 1, 2012, pp. 151-60.
Yu J, Wang Y, Qian H, et al. Polyprenols from Taxus chinensis var. mairei prevent the development of CCl₄-induced liver fibrosis in rats. J Ethnopharmacol. 2012;142(1):151-60.
Yu, J., Wang, Y., Qian, H., Zhao, Y., Liu, B., & Fu, C. (2012). Polyprenols from Taxus chinensis var. mairei prevent the development of CCl₄-induced liver fibrosis in rats. Journal of Ethnopharmacology, 142(1), pp. 151-60. doi:10.1016/j.jep.2012.04.030.
Yu J, et al. Polyprenols From Taxus Chinensis Var. Mairei Prevent the Development of CCl₄-induced Liver Fibrosis in Rats. J Ethnopharmacol. 2012 Jun 26;142(1):151-60. PubMed PMID: 22543175.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Polyprenols from Taxus chinensis var. mairei prevent the development of CCl₄-induced liver fibrosis in rats. AU - Yu,Jinhui, AU - Wang,Yanbin, AU - Qian,Hua, AU - Zhao,Yunpeng, AU - Liu,Bentong, AU - Fu,Chengxin, Y1 - 2012/04/21/ PY - 2011/12/01/received PY - 2012/03/22/revised PY - 2012/04/10/accepted PY - 2012/5/1/entrez PY - 2012/5/1/pubmed PY - 2012/10/10/medline SP - 151 EP - 60 JF - Journal of ethnopharmacology JO - J Ethnopharmacol VL - 142 IS - 1 N2 - ETHNOPHARMACOLOGICAL RELEVANCE: The aim of this study was to investigate the anti-fibrotic effects and the possible underlying mechanisms of taxus polyprenols (TPs) isolated from the needles of Taxus chinensis var. mairei. MATERIALS AND METHODS: The animals were randomly divided into normal control with vehicles only (olive oil), rat model given CCl₄ only, CCl₄+low TPs (48 mg/kg), CCl₄+medium TPs (120 mg/kg), CCl₄+high TPs (300 mg/kg), and CCl₄+Polyene phosphatidylcholine (PP, 120 mg/kg). The rat model of liver fibrosis was induced by subcutaneous injection of 40% (v/v) of CCl₄ diluted in olive oil (3 mL/kg body weight) twice per week for 8 weeks. Liver histopathological study was performed. Aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase (ALP) and albumin (ALB) of the serum were determined for evaluating the liver function. In order to reveal the possible mechanisms of the anti-fibrotic effects, oxidative stress level, hepatic collagen metabolism, and hepatic stellate cells (HSCs) activation were investigated. Furthermore, the mRNA expression of the fibrotic-related factors was measured by the quantitative real-time RT-PCR. RESULTS: TPs successfully attenuated liver injury induced by CCl₄ shown by histopathological sections of livers and improved liver function as indicated by decreased ALT, AST and ALP levels and increased ALB levels in serum of the rats. TPs significantly increased the hepatic Cu/Zn SOD and GSH-Px activities along with GSH content while a remarkable decrease in MDA content. Both immunohistochemical staining and mRNA expression levels of α-SMA indicated a profound suppression of HSCs activation. Furthermore, it significantly inhibited the mRNA expression of the pro-fibrotic cytokines Col α1(I), Col α1(Ш), MMP-2, TIMP-1, TIMP-2, PDGF-β, TGF-β1, CTGF and TNF-α and restored the hepatoprotective factor HGF. CONCLUSION: These results suggest that the protective effects of TPs in chronic CCl₄-induced liver fibrosis might be related with the reduction of oxidative damage, the inhibition of HSCs activation, the down-regulation of pro-fibrogenic stimuli and the protection of hepatocytes. SN - 1872-7573 UR - https://www.unboundmedicine.com/medline/citation/22543175/Polyprenols_from_Taxus_chinensis_var__mairei_prevent_the_development_of_CCl₄_induced_liver_fibrosis_in_rats_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0378-8741(12)00257-7 DB - PRIME DP - Unbound Medicine ER -