化疗对非小细胞肺癌患者外周血中CD8+CD28-T细胞表达的影响

目的 观察非小细胞肺癌(NSCLC)患者外周血中CD8+ CD28-T细胞的表达水平,研究化疗对CD8+ CD28-T细胞表达的影响及意义.方法 采用流式细胞仪检测70例初治NSCLC患者外周血CD8+ CD28-T细胞表达水平,以60例健康体检者作为对照,分析CD8+ CD28-T细胞与肺癌生物学及临床特征间的关系.观察30例NSCLC患者在给予长春瑞滨联合顺铂(NP)、吉西他滨联合顺铂(GP)两方案前后CD8+ CD28-T细胞表达的变化情况.结果 NSCLC患者CD8+ CD28-T细胞的表达率为(59.003±15.329)％,明显高于健康对照组(41.036±15.435)％,差异有统计学意义(t=35.904,P=0.001).CD8+ CD28-T细胞的表达与性别(F=1.374,P=0.697)、病理类型(F=0.779,P=0.509)及临床分期(F=0.070,P=0.933)无关,与年龄(F=15.038,P=0.001)有关.NP组化疗前后的CD8+ CD28-T细胞的表达率分别为(58.793±12.510)％和(55.293±14.637)％,差异有统计学意义(t=2.017,P=0.044).GP组化疗前后的CD8+ CD28-T细胞的表达率分别为(60.700±16.401)％和(54.127±13.924)％,差异有统计学意义(t=3.007,P=0.009).结论 CD8+ CD28-T细胞在NSCLC患者外周血中高表达,化疗可下调CD8+ CD28-T细胞的表达,为探讨NSCLC化疗联合免疫治疗提供了新的参考.

Effect of chemotherapy on the expression of CD8 + CD28-T cells in peripheral blood of non-small-cell lung cancer patients

Objective To observe the expression of CD8 + CD28-T cells in the peripheral blood of non-small-cell lung cancer (NSCLC) patients,and to investigate the effect of chemotherapy on CD8 + CD28-T cells expression and its clinical significance.Methods Flow cytometry was used to evaluate the level of CD8 + CD28-T cells in peripheral blood of 70 untreated NSCLC patients and 60 healthy controls.The association between CD8 + CD28-T cells and the clinical features was analyzed.We also investigated the changes of CD8 + CD28-T cells in 30 NSCLC patients who received chemotherapy by GP (gemcitabine,cisplatin) and NP (navelbine,cisplatin).Results The proportion of CD8 + CD28-T cells in lung cancer group was significantly higher than that in healthy group (59.003％ ± 15.329％ vs.41.036％ ± 15.435％,t =35.904,P =0.001).No correlation was found between CD8 + CD28-T cells expression and the gender (F =1.374,P =0.697),pathological pattern (F =0.779,P =0.509) and clinical stage (F =0.070,P =0.933).But CD8 + CD28-T cells expression was correlated with the age (F =15.038,P =0.001).The level of CD8 + CD28-T cells after NP chemotherapy was lower than that before chemotherapy (55.293％ ± 14.637％ vs.58.793％ ± 12.510％,t =2.017,P =0.044).And the level of CD8 + CD28-T cells after GP chemotherapy was lower than that before chemotherapy (54.127％ ± 13.924％ vs.60.700％ ± 16.401％,t =3.007,P =0.009).Conclusion CD8 + CD28-T cells express highly in NSCLC patients peripheral blood.Chemotherapy down-regulates CD8 + CD28-T cells expression,which provides a new reference for combination with chemotherapy and immunotherapy in NSCLC patients.