乳腺癌患者外周血Th1／Th2细胞因子的漂移及其与病理和临床病程的关系

 目的 检测乳腺癌患者外周血CD+3 T细胞分泌细胞因子的水平，分析Th1和Th2细胞的细胞因子免疫变化，为肿瘤的免疫治疗提供实验依据。方法 用刺激物刺激细胞，增加细胞内细胞因子的表达，加入荧光标记的特异性抗细胞因子单克隆抗体，特异性抗原抗体结合，应用流式细胞仪分析特异性细胞因子表达水平。同时用酶联免疫吸附法（ELISA）检测血清中相应的细胞因子。结果 CD+3 T细胞分泌的细胞因子水平及血清中的细胞因子皆表现Th1型细胞因子干扰素-γ（IFN-γ）、白细胞介素-2（IL-2）、白细胞介素-12（IL-12）表达水平较正常对照组显著降低，Th2型细胞因子白细胞介素-4（IL-4）和白细胞介素-10（IL-10）表达水平较正常对照组升高，差异有统计学意义。肿瘤坏死因子-α （TNF-α）表达水平较正常对照组升高，差异有统计学意义。结论 乳腺癌患者体内Th2型细胞因子模式占优势状态，这可能是肿瘤细胞发生免疫逃逸，从而导致肿瘤的发生或者转移的原因之一。

Clinical significance of TH1/TH2 cytokines in peripheral blood lymphocytes of patients with breast cancer

Objective To detect the level of Th1 and Th2 type cytokines of peripheral blood CD+3 T lymphocytes in patients with breast cancer, in order to find out the laboratory evidence of tumor immunother－apy. Methods The peripheral blood lymphocytes were stimulated by stimulator in order to enhance expres－sion of cytokines. Specific fluorochrome-conjugated monoclonal antibody combined with antigen. Cytokines were detected by flow cytometry and ELISA. Results Both the cytokines secreted by CD+3 T lymphocytes and serum cytokines showed that the level of Th1 type cytokines such as interferon-γ(IFN-γ), interleukin-2(IL-2), interleukin-12(IL-12) were significantly lower in patients of breast cancer than those of normal controls. The level of Th2 type cytokines such as interleukin-4(IL-4), interleukin-10(IL-10) were higher in patients of breast cancer than those of normal controls. There was significant difference between them. The level of tumor necrosis factor α （TNF-α）in patients were significant higher than normal control. Conclusion Th1/Th2 was imbalance in mammary cancer. Th1 type cytokines were inhibited, and Th2 type cytokines were relatively en－hanced, so Th1/Th2 shift to Th2. It maybe the mechanism of tumor arising and transferring by immune es－caped from immunosurveillance.