Effects of two novel nucleoside analogues on different hepatitis B virus promoters.

Abstract:

AIM:To explore the effects of the nucleoside analogues beta-L-D4A and beta-LPA on hepatitis B virus (HBV) promoters. METHODS:Four HBV promoters were amplified by polymerase chain reaction (PCR) and subcloned into the expression vector pEGFP-1. The four recombinants controlled by HBV promoters were confirmed by restriction analysis and sequencing. Human hepatoma HepG2 cells transfected with the recombinant plasmids were treated with various concentrations of beta-L-D4A and beta-LPA. Then, enhanced green fluorescent protein (EGFP)-positive cells were detected by fluorescence microscopy and using a fluorescence activated cell sorter (FACS). RESULTS:Four HBV promoters were separately obtained and successfully cloned into pEGFP-1. Expression of EGFP under the control of the surface promoter (Sp) and the X promoter (Xp) was inhibited by beta-L-D4A in a dose-dependent manner, while expression of EGFP under the control of the core promoter (Cp) and Xp was inhibited by beta-LPA in a dose-dependent manner. CONCLUSION:The two novel nucleoside analogues investigated here can inhibit the activities of HBV promoters in a dose-dependent manner. These findings may explain the mechanisms of action by which these two novel compounds inhibit HBV DNA replication.

journal_name

World J Gastroenterol

authors

He XX,Lin JS,Chang Y,Zhang YH,Li Y,Wang XY,Xu D,Cheng XM

doi

10.3748/wjg.14.1836

subject

Has Abstract

pub_date

2008-03-28 00:00:00

pages

1836-41

issue

12

eissn

1007-9327

issn

2219-2840

journal_volume

14

pub_type

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