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Resveratrol Studys for Hepatitis C

An antioxidant resveratrol significantly enhanced
replication of hepatitis C virus.


 
Biotechnol Lett. 2012 Dec;34(12):2205-12. doi: 10.1007/s10529-012-1034-0. Epub 2012 Sep 1.

Resveratrol prevents hepatic steatosis induced by hepatitis C virus core protein.

 

Source

Department of Internal Medicine, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 1608582, Japan.

Abstract

AIM:

To elucidate the effect of antioxidants, resveratrol (RVT) and astaxanthin (AXN), on hepatitis C virus (HCV) replication.

METHODS:

We investigated the effect of recent popular antioxidant supplements on replication of the HCV replicon system OR6. RVT is a strong antioxidant and a kind of polyphenol that inhibits replication of various viruses. AXN is also a strong antioxidant. The replication of HCV RNA was assessed by the luciferase reporter assay. An additive effect of antioxidants on antiviral effects of interferon (IFN) and ribavirin (RBV) was investigated.

RESULTS:

This is the first report to investigate the effect of RVT and AXN on HCV replication. In contrast to other reported viruses, RVT significantly enhanced HCV RNA replication. Vitamin E also enhanced HCV RNA replication as reported previously, although AXN did not affect replication. IFN and RBV significantly reduced HCV RNA replication, but these effects were dose-dependently hampered and attenuated by the addition of RVT. AXN did not affect antiviral effects of IFN or RBV.

CONCLUSION:

These results suggested that RVT is not suitable as an antioxidant therapy for chronic hepatitis C.

Comment in

Hepatoprotective effects of antioxidants in chronic hepatitis C. [World J Gastroenterol. 201

Source

State Key Laboratory of Cancer Biology and Department of Pathology, Xijing Hospital, Fourth Military Medical University, No.17, Changle West Road, Xi'an, 710032, Shaanxi, China.

Abstract

Hepatitis C virus (HCV) core protein plays an important role in the development of hepatic steatosis in patients with chronic HCV infection. Treatment of C57BL/6 mice infected with HCV core recombinant adenoviruses with resveratrol significantly decreased hepatic triacylglycerols (TAG) while the serum TAG level was unaffected. RT-PCR and Western blotting showed that HCV core protein attenuated the expression of Sirt1 and PPAR-?, which would be reversed by resveratrol. This was also confirmed in primary mouse hepatic cells infected with HCV core protein expressing adenovirus. Thus, resveratrol may prevent against hepatic steatosis by blocking the inhibited expression of Sirt1 and PPAR-? induced by HCV core protein.

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