丙型肝炎病毒基因型及患者人类白细胞抗原对其抗病毒疗效的影响

目的 探讨不同基因型丙型肝炎病毒(HCV)及人类白细胞抗原(HLA)-DRB等位基因多态性对慢性丙型肝炎(简称丙肝)患者干扰素联合利巴韦林治疗应答率的影响。 方法 对113例接受干扰素联合利巴韦林治疗的丙肝患者进行基因型调查,采用基因芯片技术对其中25例患者的HLA-DRB基因型进行分析,探讨病毒基因型及宿主HLA等位基因对丙肝患者抗病毒治疗反应性的影响。 结果 不同基因型HCV感染对干扰素联合利巴韦林治疗的应答率不同,其中HCV-Ⅳ/2b型应答率最高,为57.7 8％,I/la型和Ⅲ/2a型次之,分别为46.15％和47.62％,Ⅱ/1 b型应答率最低,仅为11.76％。HLA-DRBl*07阳性者对干扰素联合利巴韦林治疗的应答率较高,而DRB1*04阳性者应答率较低。患者性别、HCV基因型、宿主HLA-DRB等位基因三种因素均与抗病毒疗效密切相关,女性、Ⅳ型HCV感染以及携带HLA-DRB1*07等位基因的患者多表现为完全应答,而男性、Ⅱ型HCV感染以及携带HLA-DRB1*04等位基因的患者多表现对干扰素联合利巴韦林治疗无应答。其中DRB1*07等位基因及Ⅳ型HCV感染对抗病毒疗效的影响最大。 结论 病毒与宿主在影响抗病毒治疗应答状况方面具有同等重要的地位,丙肝的治疗方案不应单纯只针对抗病毒一个方面.还应着眼于宿主本身,通过多种方式调节机体的免疫状态以增强宿

Effects of HCV genotypes and HLA-DRB alleles on the response of chronic hepatitis C patients to interferon alpha and libavilin

OBJECTIVES: To study the effects of HCV genotypes and HLA-DRB alleles on the response of chronic hepatitis C patients to interferon alpha and libavilin. METHODS: Genotypes of HCV in 113 patients with HCV infection treated with interferon alpha and libavilin were investigated. Gene chips were used to analyze the frequency of HLA-DRB alleles in 25 patients of them. The response to interferon alpha and libavilin therapy were discussed. RESULTS: The response rates in the four HCV types were different, HCV-IV/2b the highest (57.78%), HCV-I/1a and -III/2a lower (46.15% and 47.62%), and HCV-II/1b the lowest (11.76%).The response rate to IFN and libavilin therapy in patients with DRB1*07 positive was higher, while in patients with DRB1*04 positive was lower. Sex, HCV genotypes and HLA-DRB alleles were all related to the response. Female, patients with HCV-IV/2b and HLA-DRB1*07 presented almost complete response, but male, patients with HCV-II/1b and HLA-DRB1*04 usually appeared non-response. DRB1*07 allele and HCV-IV/2b were the closest factors related to the response. CONCLUSIONS: Not only virus but also host playes an important role in the curative effect of anti-virus therapy. It is necessary to view from the angle of host, adjusting the host's immune status to accelerate the clearance of HCV.