目的：研究HIV和HCV（HIV／HCV）感染对患者外周血单个核细胞（PBMC）中A3G mRNA表达及外周血中内源性干扰素（ IFN）-α水平的影响。方法以未经抗病毒治疗的慢性丙型肝炎患者（ HCV单一感染组，43例）、艾滋病患者（ HIV单一感染组， CD4＋T 淋巴细胞＜200个／μL，45例）和HIV／HCV合并感染组（ CD4＋T淋巴细胞＜200个／μL，45例）为研究对象，并以23名我院门诊健康体检者作为对照组。采用实时荧光定量PCR法检测A3G mRNA，酶联免疫吸附试验（ ELISA）检测血浆中内源性IFN-α的表达量。组间比较采用秩和检验，相关性分析用Spearman秩相关分析。结果 HIV单一感染组、HIV／HCV合并感染组、HCV单一感染组和健康对照组PBMC中A3G mRNA的表达量分别为4.89（0.59），4.85（0.71），3.89（1.08）和3.69（0.81）lg拷贝／mL。其中，HIV单一感染组和HIV／HCV合并感染组PBMC中A3G mRNA的表达量均明显高于健康对照组（ Z＝－6.306和－6.280，P＜0.01）和HCV单一感染组（Z＝－7.358和－7.275，P＜0.01）。 HIV单一感染组、HIV／HCV合并感染组、HCV单一感染组和健康对照组血浆中 IFN-α表达量分别为2.79（1.25），2.05（1.29），2.32（1.84）和2.16（2.19） pg／mL，其中 HIV 单一感染组血浆中 IFN-α表达量稍高于HIV／HCV合并感染组（Z＝－2.332，P＜0.05），其他各组血浆中IFN-α表达量比较差异均无统计学意义（P值均＞0.05）。血浆中 IFN-α水平与 A3G mRNA 表达水平未见明显相关性（rs ＝0.04，P ＞0.05），A3G mRNA 及 IFN-α表达量与HIV 及 HCV RNA 载量亦无明显相关性（P 值均＞0.05）。结论 HIV感染者PBMC高表达A3G，合并HCV感染对艾滋病患者的A3G表达无明显影响；A3G mRNA与IFN-α无明显相关性，且对HIV、HCV RNA载量的影响并不明显。%Objective To study the impact of HIV and hepatitis C virus ( HCV ) infection on peripheral expression of antiviral protein A3G and plasma IFN-αlevels.Methods Untreated patients with chronic hepatitis C(HCV infection group, n=43), AIDS(HIV infection group, CD4 +T<200 cells/μL, n=45) and HIV/HCV co-infection (CD4 +T<200 cells/μL, n=45) were recruited in the study, and 23 healthy subjects were also enrolled as controls.A3G mRNA in peripheral blood mononuclear cells (PBMC) was measured by quantificational real-time PCR, and plasma IFN-αlevel was determined by enzyme linked immunosorbent assay (ELISA).Rank-sum test and Spearman rank correlation analysis were performed. Results A3G mRNA levels in HIV infected group, HIV/HCV co-infected group, HCV infected group and healthy control group were 4.89 (0.59), 4.85 (0.71), 3.89 (1.08) and 3.69 (0.81) lg copies/mL, respectively.A3G mRNA levels in HIV infected group and HIV/HCV co-infected group were much higher than those in healthy control group (Z=-6.306 and -6.280, P<0.01) and HCV infected group (Z=-7.358 and -7.275, P<0.01).Plasma IFN-αlevels in HIV infected group, HIV/HCV co-infected group, HCV infected group and healthy control group were 2.79 (1.25), 2.05 (1.29), 2.32 (1.84) and 2.16 (2.19) pg/mL, respectively.Plasma level of IFN-αin HIV infected group was higher than that in the HIV/HCV co-infected group (Z=-2.332, P<0.05), but no significant difference was observed among other groups (all P>0.05).There was no significant correlation between plasma IFN-αlevel and A3G mRNA expression (rs =0.04, P>0.05), and the levels of A3G mRNA and IFN-αshowed no correlation with HIV RNA and HCV RNA (all P>0.05).Conclusions A3G is highly expressed in PBMCs from HIV infected patients, and it may not be affected by the infection of HCV.A3G mRNA is not closely correlated with IFN-α, and it has not significant influence on HIV RNA and HCV RNA replication.
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