摘要
目的检测口腔鳞状细胞癌患者外周血中程序性死亡分子1(PD-1)及其配体(PD-L1)的表达水平,探讨其生物学及临床意义。方法选取82例口腔鳞状细胞癌患者(口腔鳞癌组)和25例健康对照者(对照组)为研究对象,收集研究对象的外周血,采用流式细胞术检测外周血T淋巴细胞表面PD-1、PD-L1的表达及T淋巴细胞亚群计数,采用酶联免疫吸附方法检测血清中可溶性PD-1(s PD-1)和可溶性PD-L1(s PD-L1)的表达水平。采用SPSS 17.0软件对数据进行检验和相关性分析。结果口腔鳞癌组外周血CD8+T淋巴细胞百分数明显高于对照组(P<0.05),而CD3+、CD4+T淋巴细胞百分数及CD4+/CD8+T亚群百分数比值均低于对照组(P<0.05)。口腔鳞癌组外周血CD4+、CD8+T淋巴细胞表面PD-1、PD-L1的阳性表达率均高于对照组(P<0.01)。口腔鳞癌组血清s PD-L1水平高于对照组(P<0.05),而s PD-1水平二者差异无统计学意义(P>0.05)。s PD-L1的表达与临床分期、肿瘤分化程度及淋巴结转移状态相关(P<0.05),与性别、年龄、肿瘤部位及大小无关。结论口腔鳞状细胞癌患者外周血T淋巴细胞亚群存在不同程度的免疫功能抑制,CD4+和CD8+T淋巴细胞表面PD-1及PD-L1表达显著升高。异常升高的s PD-L1可能与口腔鳞状细胞癌的发生发展有关。
Objective To detect the expression levels of programmed death-1 (PD-1) and programmed death ligand-1 (PD-L1) in the peripheral blood of patients with oral squamous cell carcinoma (OSCC) and to discuss their biological and clinical significance. Methods PD-1/PD-L1 expression on the surface of T-lymphocytes and the counts of T-lymphocyte subpopulations of peripheral blood in 82 patients with OSCC (OSCC group) and 25 healthy controls (control group) were examined via flow cytometry. The expression levels of soluble PD-1 (sPD-1) and soluble PD-L1 (sPD-L1) in the serum were observed through enzyme-link immunology method. The data were tested and analyzed with SPSS 17.0 software. Results The percentage of CD8+ T cells in the OSCC group was significantly higher than that in the control group (P〈0.05), whereas the percentages of CD3+ and CD4+ T cells as well as CD4+/CD8+ ratio were significantly lower than those in the control group (P〈0.05). The positive rates of PD-1 and PD-L1 in CD3+ and CD4+ T cells in OSCC peripheral blood were remarkably higher than those in the control group (P〈0.01). Difference was not observed between the expression levels of sPD-1 in the serum of OSCC group and those in the control group (P〉0.05), but the average of sPD-L1 was remarkably higher than that in the control group (P〈0.05). sPD-L1 expression was related to clinical stage, tumor cell differentiation, and lymph node status (P〈0.05) but not related to sex, age, tumor location, and tumor size. Conclusion T-lymphocyte subpopulations in the peripheral blood of patients with OSCC developed immunosuppression with different degrees. PD-1 and PD-L1 expression levels on the surface of CD3+ and CD4+ T cells significantly increased. Abnormal increase in sPD-L1 expression may be associated with OSCC development.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2015年第5期529-533,共5页
West China Journal of Stomatology
基金
江西省教育厅科学技术研究基金资助项目(GJJ14052)