Abstract

目的观察程序性死亡受体1/及其配体(PD-1/PD-L1)共刺激分子在慢性淋巴细胞白血病(CLL)患者中的表达水平,并探讨其可能的临床意义。方法以57例CLL患者为研究对象,以20名健康体检者为对照,采用流式细胞术分别检测其外周血CD8+、CD4+T细胞和CD19+B细胞中PD-1的表达水平,以及树突细胞(DC)中PD-L1的表达水平;同时分析PD-1/PD-L1表达与疾病分期、CD38表达、ZAP-70表达、染色体核型异常、β2微球蛋白(β2-MG)表达水平的相关性。结果①CLL患者组中男39例,女18例,平均年龄(63.7±10.7)岁。与对照组比较,年龄、性别差异无统计学意义(P值均>0.05);CLL患者组外周血中PD-1、PD-L1的表达均高于对照组(P值均<0.05)。②在Rai分期低、中、高危组中,随着危险度的增高PD-1、PD-L1的表达水平亦增高(P值均<0.05)。③PD-1表达在CD8+CD38+组(11例)高于CD8+CD38−组(46例)(P=0.004),在CD8+预后不良染色体组(14例)高于CD8+预后良好染色体组(28例)(P=0.004)。④PD-L1表达在CD38+组(11例)高于CD38−组(46例)(P=0.002),在ZAP-70+组(11例)高于ZAP-70−组(28例)(P<0.001),在预后不良染色体组(14例)高于预后良好染色体组(28例)(P=0.023)。PD-1、PD-L1表达与β2-MG表达无相关性(P值均>0.05)。结论PD-1、PD-L1在CLL患者体内存在高表达,其表达水平与疾病分期、CD38表达、ZAP-70表达、染色体核型等预后指标存在一定的相关性,与β2-MG表达无相关性,提示其有可能作为评估CLL患者预后的指标。

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