华西口腔医学杂志

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程序性死亡分子1及其配体在口腔鳞状细胞癌患者外周血中的表达及临床意义

张鹏1  欧阳少波1  王军2  黄自坤3  王娇龙1  廖岚1   

  1. 1.南昌大学附属口腔医院修复科;2.南昌大学第二附属医院口腔颌面外科;3.南昌大学第一附属医院检验科,南昌 330006
  • 收稿日期:2015-02-15 修回日期:2015-05-20 出版日期:2015-10-01 发布日期:2015-10-01
  • 通讯作者: 张鹏,硕士,E-mail:zhangpp0708@163.com
  • 作者简介:张鹏,硕士,E-mail:zhangpp0708@163.com
  • 基金资助:

    江西省教育厅科学技术研究基金资助项目(GJJ14052)

Levels of programmed death-1 and programmed death ligand-1 in the peripheral blood of patients with oral squamous cell carcinoma and its clinical implications

Zhang Peng1, Ouyang Shaobo1, Wang Jun2, Huang Zikun3, Wang Jiaolong1, Liao Lan1.   

  1. 1. Dept. of Prosthodontics, The Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China; 2. Dept. of Oral and Maxillofacial Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, China; 3. Dept. of Clinical Laboratory, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
  • Received:2015-02-15 Revised:2015-05-20 Online:2015-10-01 Published:2015-10-01

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(sPD-1)和可溶性PD-L1(sPD-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sPD-L1水平高于对照组(P<0.05),而sPD-1水平二者差异无统计学意义(P>0.05)。sPD-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sPD-L1可能与口腔鳞状细胞癌的发生发展有关。

关键词: 口腔鳞状细胞癌, T淋巴细胞, 程序性死亡分子1, 程序性死亡分子配体1

Abstract:

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.

Key words: oral squamous cell carcinoma, T-lymphocyte, programmed death-1, programmed death ligand-1