蛋白激酶激活受体-2在人类结直肠癌中表达的研究

目的研究蛋白酶激活受体-2(PAR-2)在结直肠癌中的蛋白表达和mRNA表达的水平,并探讨其临床价值。方法采用免疫组织化学法、免疫荧光分析法和实时荧光定量PCR的方法,检测38例结直肠肿瘤患者的正常肠黏膜组织、癌旁组织和癌组织PAR-2的蛋白和mRNA的表达情况。结果(1)PAR-2在结直肠正常肠黏膜、癌旁组织和癌组织中表达阳性率分别为25%、45%和85%;(2)PAR-2的表达强度的IOD值由弱到强依次为正常肠组织(681±101)、癌旁组织(6627±971)和癌组织(15861±2709),三组间经方差分析差异有统计学意义(F=132.6,P<0.05);(3)PAR-2 mRNA在正常肠组织、癌旁组织和癌组织的表达水平分别为1.57±0.69、2.91±1.4和4.09±1.99,三组间的差异有统计学意义(F=9.688,P=0.00);结论PAR-2的表达在结直肠肿瘤中高表达;PAR-2的表达和结直肠肿瘤的发生和发展密切相关。

A study on the expression of proteinase-activated receptor-2 in colorectal carcinoma

Objective investigate the relationship between PAR-2 and colorectal cancer. Methods Specimens were obtained from 38 patients with colorectal cancer.Protein and mRNA expression of PAR-2 were determined by SP immunohistochemistry,immunofluorescence,Western-blot and real-time PCR.Results The expression of PAR-2 significantly increased in colorectal cancer tissues as compared with tumor adjacent tissue and normal tissues of the healthy controls on mRNA level and protein level (F= 9.688,P=0.00).Conclusion There are overexpressions of PAR-2 in colorectal cancer,the expression of PAR-2 are closely correlated with the maliganant behaviors of colorectal cancer.