Objective: To explore relationship between effect of Lamivudine in the treatment of cirrhotic patients with uncompensated hepatitis B with hepatitis B virus (HBV)genotypes and HBV specific cytotoxic T lymphocytes (CTL).
Methods: 80 cases of uncompensated cirrhotic hepatitis B (40 cases with genotype B and 40 with genotype C), HBV DNA positive, HBeAg positive and human leukocyte antigen (HLA)-A2 positive,were treated with Lamivudine 100 mg/d, one year later, its effect and relationship with HBV genotypes and HBV specific CTL were observed.
Results: HBV DNA turned negative:40 cases with genotype B turned negative (100%). In the 9th and 10th month of treatment, there was one case with genotype C had YMDD variation respectively and Adefovir dipivoxil was used for treatment, of the rest 38 cases, HBV DNA of 26 cases (68.42%) turned negative,HBV DNA negative rate of patients with genotype is lower than that of patients with genotype B, chi2 = 14.91, P < 0.01. HBeAg turned negative: 18 cases with genotype B (45%) turned negative, more than that of patients with genotype C (7 cases, 18.42%), chi2 = 6.32, P < 0.05. Peripheral blood HBV specific CTL level: before treatment, it was (0.33 +/- 0.03)% of patients with genotype B,higher than that of patients with genotype C [(0.11 +/- 0.02)%], t = 8.12, P < 0.001. 1 year after treatment: it was (0.44 +/- 0.04)% of patients with genotype B, higher than that before treatment, t = 4.01, P < 0.001, it was also higher than that of patients with genotype C 1 year after treatment [(0.23 +/- 0.03)%], t = 5.63, P < 0.01, alanine amino-transferase (ALT) returned to normal: 38 cases with genotype B (95%) returned to normal, more than that of patients with genotype C (28 cases, 73.68%), X2 = 6.79, P < 0.01.
Conclusion: Effect of Lamivudinein the treatment of cirrhotic patients with uncompensated hepatitis B is better in patients with genotype B than patients with genotype C, its mechanism may be related to lower level of HBV specific CTL in patients with genotype C than patients with genotype B.
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