Effi cacies of β-L-D4A against Hepatitis B virus in 2.2.15 cells

AIM: To investigate the antiviral effect of beta-L-enantiomer of 2',3'-didehydro-2',3'-dideoxyadenosine (beta-L-D4A) on 2.2.15 cells transfected with the hepatitis B virus (HBV) genome. METHODS: Lamivudine (3TC) as a positive control. Then, HBV DNA in treated 2.2.15 cells and the Hepatitis B surface antigen (HBsAg) in the culture supernatants were detected to determine the inhibitory effect of beta-L-D4A. At the same time, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) was used to detect the survival ratio of 2.2.15 cells. RESULTS: beta-L-D4A has a dose-dependent inhibitory effect on HBV DNA replication; this effect was apparent when the concentration was above 1 mol/L. When beta-L-D4A was at the highest concentration, 100 mol/L, the HBsAg inhibition ratio was above 50%. The Therapeutic index (TI) of beta-L-D4A was above 2.1. CONCLUSION: beta-L-D4A has a dose-dependent inhibitory effect on the replication of HBV DNA and the secretion of HBsAg at low toxicity.