e抗原阳性慢性乙型肝炎患者感染病毒的基因型与抗病毒治疗疗效的关系

目的 探讨HBV基因型与抗病毒治疗疗效的关系。方法 应用PCR-微板核酸分子杂交ELISA法检测90例HBeAg阳性CHB患者的HBV基因型,对其中41例患者给予拉米夫定（100 mg／d）抗病毒治疗48周,49例患者给子干扰素α（3 MU／次,隔日1次）抗病毒治疗48周,治疗前、治疗过程中和治疗结束时分别检测血清生化指标（ALT）、病毒学血清标志物（HBeAg和抗-HBe）和HBV DNA水平。结果 90例CHB患者中HBV B基因型者16例,C基因型者74例。41例患者应用拉米夫定治疗,感染B和C基因型患者48周时对拉米夫定治疗应答率分别为33.3％和20%,差异无统计学意义;49例患者应用干扰素α治疗,48周时感染基因B型患者的ALT复常率、HBeAg消失率和HBV DNA阴转率均高于感染基因C型患者（分别为60.0％和20．5％,50．0％和17．9％, 50．0％和17．9％）,两组比较差异有统计学意义,但HBeAg血清转换率差异无统计学意义。结论 基因B和C型对拉米夫定抗病毒治疗的疗效无影响,基因B型对干扰素α治疗的疗效优于C型。

The relationship between HBV genotypes and the efficacy of antiviral therapies in hepatitis B e antigen-positive patients

Objective To study the relationship between HBV genotypes and the efficacy of antiviral therapies. Methods HBV genotypes of 90 hepatitis B e antigen positive patients with chronic hepatitis B (CHB) were determined by PCR sandwich hybridization-ELISA technique. Forty-one patients with CHB were treated with lamivudine (100 mg/day) for 48 weeks and 49 patients with CHB were given alpha-interferon (3 MU/QOD) therapy for 48 weeks. The serological, biochemical and virological symbols were measured before, during and after treatment for all the patients. Results Of the 90 patients, genotype B HBV was found in 16 and C in 74. There was no difference in the rate of response to lamivudine treatment between patients with genotype B or C HBV (33.3% vs. 20.0%) after 48 weeks treatment with lamivudine in the 41 patients. Of the 49 HBeAg positive CHB patients treated with alpha-interferon for 48 weeks, in HBV genotype B and C patients the rates of normalization of ALT were 60.0% and 20.5%; the rate of HBeAg turning to negativity was 50.0% and 17.9%; and the rate of HBV DNA undetectability was 50.0% and 17.9%. The rate of response to the interferon treatment was significantly higher in patients with HBV genotype B compared to those with genotype C. Conclusions Our study shows that there is no influence on the lamivudine treatment effects for the HBV genotype B and C CHB patients, but the alpha-interferon treatment for HBV genotype B CHB patients is more effective than that for the genotype C ones.