IFN-α治疗慢性乙型肝炎疗效与记忆性T细胞的相关性

摘要

目的 研究IFN-α在治疗慢性乙型肝炎患者中对记忆性T细胞亚群变化的影响,及其临床治疗效果与记忆性T细胞亚群变化的相关性.方法 57例接受IFN-α治疗的慢性乙型肝炎(CHB)患者,分别在治疗前(O周),及疗程期内不同时间点(12周和24周)抽取外周血,分离外周血单个核细胞(PBMCs)后加入抗体染色,流式细胞仪检测,统计学分析.结果 非活动性HBsAg携带者CD8效应记忆性T细胞(CD8+TEM)的比例显著高于未经IFN-α治疗的CHB患者;相反,CD8中心记忆性T细胞(CD8+TCM)的百分比则显著低于未经IFN-α治疗的CHB患者(P<0.05);有效组CD8+TEM百分比在IFN-α治疗前和治疗24周时均高于无效组,CD8+TCM百分比在IFN-α治疗前和治疗24周时则低于无效组(P<0.05);有效组IFN-α的剂量明显高于无效组.结论 病毒的清除与效应记忆性T细胞亚群比例可能有关,TEM亚群在数量上占优势可能对IFN-α治疗效果有益.%Objective To investigate the influence of interferon-a therapy on CD8 T memory subsets in patients with chronic hepatitis B(CHB) and correlation between the effect of IFN-α and CD8 T memory subsets. Methods Blood samples from 57 patients with CHB were collected before treatment (0 week), at 12 weeks and 24 weeks of treatment with pegylated IFN-α. Assays were performed on freshly isolated peripheral blood mononuclear cells ( PBMCs). For phenotype analysis, All data were acquired on a flow cytometer instrument and prepared for analysis. Results A significantly higher frequency of CD8+ TEM and lower frequency of CD8+ TCM in inactive HBsAg carriers than that in CHB patients prior to treatment was observed (P <0.05). The proportion of CD8 + TCM was higher in group nonresponders than in group respond-ers, and the proportion of CD8 + TEM was lower in group nonresponders than in group responders (P < 0.05 ). The average dosage of IFN-α applied to patients with response was significantly higher than nonresponders. Conclusion The dominance of circulating effector memory T cells may be associated with elimination of viral infection, and possibly benefit for response to therapy with IFN-α.