拉米夫定早期疗效与乙型肝炎病毒基因型的关系

目的研究拉米夫定早期疗效与乙型肝炎病毒(HBV)基因型的关系。方法选取2001至2002年拉米夫定治疗12个月的595例慢性乙型肝炎患者作为研究对象,分别对HBV基因型和DNA(HBVDNA)、HBeAg／抗HBe及治疗12个月后的酪氨酸-蛋氨酸-天门冬氨酸-天门冬氨酸(YMDD)变异进行检测,应用SPSS软件分析数据。结果595例慢性乙型肝炎患者中,A型8例(1．4％),B型53例(8．9％),C型360例(60．5％),BC混合型112例(18．8％),AC混合型14例(2．4％),AB混合型15例(2．5％),ABC混合型6例(1．0％),未分型者27例。拉米夫定治疗12个月后HBVDNA阴转率：B型87．2％,C型89．51％,BC型93．04％,三者比较,差异无统计学意义;HBeAg血清转换率：B型11．65％,C型20．64％,BC混合型18．57％,三者比较,差异无统计学意义;治疗12个月时HBVDNA出现反跳的病例中,69例发生了YMDD变异,其中C型46例(15．38％),B型9例(16．98％),BC混合型14例(13．86％),差异无统计学意义。结论拉米夫定早期疗效与HBV基因型、HBeAg血清转换率、HBVDNA水平及YMDD变异未见直接关系。

Relationship between B virus hepatitis genotypes and therapeutic efficacy in early treatment for chronic hepatitis B by using lamivudine

Objective To investigate the relationship between hepatitis B virus(HBV) genotype and therapeutic efficacy during the early phase of lamivudine treatment.Methods Totally 595 patients with chronic hepatitis B were treated with lamivudine 100 mg/day for 12 months. HBV genotypes, contents of HBV DNA,HBeAg/anti-HBe and YMDD mutation after lamivudine treatment for 12 months were determined. The data were analyzed with SPSS software.Results In 595 patients , 8 (1.4%) were genotype A; 53 (8.9%) genotype B; 360 (60.5%) genotype C; 112 (18.8%) were coinfection of genotype B and C; 14 (2.4%) of A and C; 15 (2.5%) A and B; 6 (1.0%) of A,B,and C, and remaining 27 (4.5%) were unspecified. Patients were treated with lamivudine 100 mg/day for 12 months. Genotype B with HBV DNA levels turned to be negetive(HBV DNA<0.1 ng/L)was 87.2%,genotype C was 89.51%,coinfection of genotype B and C was 93.04%(P>0.05). HBeAg seroconversion of genotype B was 11.65%, of genotype C was 20.64%, and of coinfection of genotype B and C was 18.57%(P>0.05). All 69 strains of YMDD mutation were detected after lamivudine treatment for 12 months, in which genotype B was in 16.98%, genotype C in 15.38%, and coinfection of genotype B and C was in 13.86% (P>0.05).Conclusion There was no difference in HBV genotypes and the rate of development of YMDD mutations, HBeAg seroconversion, descending of HBV DNA level in Chinese patients with chronic hepatitis B.