IFN-γ和IL-4在结直肠癌组织中的表达及与临床分期的关系

Expression of IFN-γand IL-4 in colorectal cancer and their relationship with clinical stage

目的探讨结直肠癌组织中辅助性T(Th)1细胞因子γ干扰素(IFN-γ)与Th2细胞因子白细胞介素-4(IL-4)的表达情况及与患者临床分期的关系。方法收集2016年1月—2018年8月湖南医药学院第一附属医院收治的61例结直肠癌患者的肠组织标本为结直肠癌组,依据临床分期将其分为临床Ⅰ期(16例),临床Ⅱ期(20例),临床Ⅲ期(15例),临床Ⅳ期(10例)。另收集各期患者距离癌组织边缘外10 cm的癌旁组织各5例(共20例)作为对照组。免疫组织化学法检测不同分期患者组织中IFN-γ和IL-4的表达情况,分析每组阳性染色部分的平均积分光密度值(MIOD),比较各组间IFN-γ和IL-4的表达。结果肿瘤分期越高,IFN-γ表达的阳性程度越弱;肿瘤分期越高,IL-4的阳性越强。临床Ⅳ期结直肠癌组织IL-4 MIOD值高于临床Ⅰ~Ⅲ期及对照组,临床Ⅱ、Ⅲ期结直肠癌组织IL-4 MIOD值高于临床Ⅰ期及对照组,临床Ⅰ期结直肠癌组织IL-4 MIOD值高于对照组,差异均有统计学差异(均P<0.05);临床Ⅳ期结直肠癌组织IFN-γMIOD值低于临床Ⅰ~Ⅲ期及对照组,临床Ⅲ期结直肠癌组织IFN-γMIOD值低于Ⅰ~Ⅱ期及对照组,临床Ⅱ期结直肠癌组织IFN-γMIOD值低于Ⅰ期及对照组,临床Ⅰ期结直肠癌组织IFN-γMIOD值低于对照组,差异均有统计学差异(均P<0.05)。结论结直肠癌组织中细胞因子IFN-γ的表达减少,IL-4的表达增加,且与患者临床分期密切相关。

Objective To investigate the expression of T helper(Th)1 cytokine interferon-γ(IFN-γ)and Th2 cytokine interleukin-4(IL-4)in colorectal cancer tissues and explore its relationship with clinical stage.Methods The intestinal tissue samples of 61 patients with colorectal cancer admitted to the First Affiliated Hospital of Hu′nan University of Medicine from January 2016 to August 2018 were collected as colorectal cancer group.According to the clinical stage,they were devided into clinical stageⅠ(16 cases),clinical stageⅡ(20 cases),clinical stageⅢ(15 cases),clinical stageⅣ(10 cases).In addition,5 cases(20 cases in total)of paracancer tissues 10 cm away from the edge of the cancer tissues were collected as the control group.The immunohistochemistry was used to detect the expression of IFN-γand IL-4 in tissues.Then the mean integrated optical density(MIOD)of the positive staining fraction of each group was analyzed,and the expression differences of IFN-γand IL-4 among all groups were compared.Results The higher the tumor stage,the weaker the positive degree of IFN-γexpression.The higher the tumor stage,the stronger the IL-4 positive.IL-4 MIOD value in clinical stageⅣcolorectal cancer tissue was higher than that in clinical stageⅠ-Ⅲand the control group,IL-4 MIOD values in the clinical stageⅡ-Ⅲcolorectal cancer tissue were higher than those in clinical stageⅠand the control group,IL-4 MIOD value in the clinical stageⅠcolorectal cancer tissue was higher than that in the control group,and the differences were statistically significant(all P<0.05).IFN-γMIOD value in clinical stageⅣcolorectal cancer tissue was lower than that in the clinical stageⅠ-Ⅲand the control group,IFN-γMIOD value in the clinical stageⅢcolorectal cancer tissue was lower than that in the clinical stageⅠ-Ⅱand the control group,IFN-γMIOD value in the clinicalⅡcolorectal cancer tissue was lower than that in the clinical stageⅠand the control group,IFN-γMIOD value in the clinical stageⅠcolorectal cancer tissue was lower than that in the control group,and the differences were statistically significant(all P<0.05).Conclusion The expression of cytokine IFN-γis decreased in colorectal cancer tissues,and the expression of IL-4 is increased,which are closely related to the clinical pathological stage of patients.