结肠癌肿瘤微环境中TIM-3表达情况及其与患者临床病理特征相关性分析

Expression of TIM-3 in tumor microenvironment of colon cancer and its correlation with clinicopathological features

目的探讨分析结肠癌肿瘤微环境中T细胞免疫球蛋白黏蛋白3(TIM-3)表达情况及其与患者临床病理特征的相关性。方法选择2013年3月—2015年5月浙江省台州医院结肠癌手术切除肿瘤组织标本及癌旁组织标本各57例,采用免疫组化法检测结肠癌组织以及癌旁组织TIM-3表达情况,并分析结肠癌组织中TIM-3表达与患者临床病理特征相关性,以及TIM-3表达与患者随访生存情况的关系。结果结肠癌组织中TIM-3弱表达35.09%、强表达64.91%,癌旁组织中TIM-3弱表达71.93%、强表达28.07%,肿瘤组织中TIM-3强表达百分比显著高于癌旁正常组织(P<0.05)。在结肠癌组织中,TIM-3强表达与结肠癌组织学分型、肿瘤分期、淋巴结转移明显相关(均P<0.05),与患者性别、年龄、肿瘤大小无关(均P>0.05)。结肠癌肿瘤组织TIM-3弱表达患者术后生存情况显著优于肿瘤组织TIM-3强表达患者,两者生存情况差异具有统计学意义(P<0.05)。结论结肠癌肿瘤微环境中TIM-3处于高表达状态,且与结肠癌组织学分型、肿瘤分期、淋巴结转移密切相关,且TIM-3高表达患者术后生存情况较差,TIM-3表达可作为结肠癌患者预后判断的潜在指标之一。

Objective To investigate the expression of T cell immunoglobulin mucin 3(TIM-3) in tumor microenvironment of colon cancer and its correlation with clinicopathological features. Methods The study selected 57 patients with colorectal cancer who were treated from March 2013 to May 2015 in Zhejiang Taizhou Hospital. Immunohistochemistry was used to detect the expression of TIM-3 in colorectal cancer tissues and adjacent tissues of these patients. The correlation between the expression of TIM-3 and the clinicopathological features of patients with colorectal cancer and the relationship between the expression of TIM-3 and the follow-up survival were analyzed. Results The weak and strong expression of TIM-3 were 35.09% and 64.91% respectively in colorectal cancer, 71.93% and 28.07% respectively in adjacent tissues, and the strong expression percentage of TIM-3 in tumor was significantly higher than that in adjacent normal tissues(P<0.05). In colon cancer tissues, the strong expression of TIM-3 was significantly correlated with histological classification, tumor stage and lymph node metastasis(all P<0.05), but not with gender, age and tumor size(all P>0.05). The survival rate of colon cancer patients with weak expression of TIM-3 in tumor tissue was significantly better than that of patients with strong expression of TIM-3 in tumor tissue(P<0.05). Conclusion The expression of TIM-3 in the tumor microenvironment of colon cancer is highly correlated with histological classification, tumor stage and lymph node metastasis, and the survival of patients with high expression of TIM-3 is poor after operation. The expression of TIM-3 may be one of the potential prognostic indicators of patients with colon cancer.