乙型肝炎病毒YMDD变异的治疗对策

目的 探讨慢性乙型肝炎患者发生YMDD病毒变异后的治疗策略. 方法 2005年6月-2007年6月在门诊和住院的经拉米夫定治疗后出现YMDD变异的慢性乙型肝炎患者120例,随机分为4组,A组单用阿德福韦酯10 mg/d,治疗48周;B组采用阿德福韦酯10 mg/d,拉米夫定100 mg/d,联合治疗12周,后单用阿德福韦酯10mg/d治疗36周;C组采用阿德福韦酯10mg/d、拉米夫定100mg/d,联合治疗48周;D组接受恩替卡书1 mg/d,治疗48周.根据资料不同,分别采用方差分析、q检验和χ2检验.结果 4组患者治疗12周内ALT水平进一步反弹升高的患者比例分别为30.0%(9/30)、10.0%(3/30)、6.7%(2/30)、10.0%(3/30)(A组与B组、D组间比较χ2=3.750,P=0.053;A组与C组比较χ2=5.455,P<0.05).A组1例患者出现重型肝炎;治疗12周时4组患者YMDD变异株检测阳性率分别为17.2%、0、0、0;治疗48周时4组患者间ALT水平、HBeAg阳性患者血清转换率比较,差异均无统计学意义.C组、D组患者ALT复常率、HBVDNA达到检测水平以下的百分率与A组患者比较,χ2值分别为7.131、5.516、5.260、6.748,P值均<0.05,差异有统计学意义.4组患者的基因型耐药率分别为6.9%(2/29)、6.7%(2/30)、0、0,A组2例耐药患者测序为rtN236T变异,B组rtA181V和rtN236T变异各1例.结论 YMDD变异后采用阿德福韦酯与拉米夫定联合治疗或恩替卡韦治疗更安全有效.

Astudy on the treatment of chronic hepatitis B with YMDD mutation

Objective To explore the strategy for the treatment of chronic hepatitis B with YMDD mutation. Methods A total of 120 chronic hepatitis B patients with YMDD mutation were randomly as-signed into four groups. In group A, patients received adefovir dipivoxil for 48 weeks. In group B, patients received adefovir dipivoxil in combination with lamivudine during the first 12 weeks and adefovir dipivoxil only for the following 36 weeks. In group C, patients received adefovir dipivoxil in combination with lamivudine for 48 weeks. In group D, patients received entecavir for 48 weeks. Results The rate of rebound of alanine aminotransferase (ALT) was 30.0% (9/30), 10.0% (3/30), 6.7% (2/30), 10.0% (3/30) (P<0.05) during the first 12 weeks, and one patient with severe hepatitis was found in group A. The positive rate of YMDD mutation was 17.9%, 0, 0, 0 at week 12. There was no significant difference in the level of ALT and the rate of HBeAg seroconversion after 48-week treatment (P>0.05). At week 48, there was significant difference in the ALT normalization rate and undetectable HBV DNA rate between group C and group A, and also between group D and group A, and the rate of drug resistant genotype was 6.9%, 6.7%, 0, 0. Two patients had rtN236T mutation in group A, and one patients had rtN236T mutation and another one had rtA181V mutation in group B. Conclusion Adefovir dipivoxil in combination with lamivudine or entecavir are safe and effective thera-pies for chronic hepatitis B patients with YMDD mutation.