AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of col...AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of colonic mucosa with IBD colitis, colitis-associated raised low-grade dysplasia (LGD) including dysplasia-associated lesions or masses (DALMs, n = 18) and adenoma-like dysplastic polyps (ALDPs, n = 4), colitis-associated high-grade dysplasia (HGD, n = 11) and colitis-associated colorectal carcinoma (CACRC, n = 13), sporadic colorectal adenomatous polyp (SAP, n = 17), and sporadic colorectal carcinoma (SCRC, n = 12). The immunoreactivity of NTSR1 was semiquantitated (as negative, 1+, 2+, and 3+) and compared among different conditions.RESULTS: NTSR1 was not detected in normal mucosa but was expressed similarly in both active and inactive colitis. LGD showed a significantly stronger expression as compared with non-dysplastic colitic mucosa, with significantly more cases showing > 2+ intensity (68.75% in LGD vs 32.26% in nondysplastic mucosa, P = 0.001). However, no significant difference existed between DALMs and ALDPs. CACRC and HGD showed a further stronger expression, with significantly more cases showing 3+ intensity than that in LGD (61.54% vs 12.50% for CACRC vs LGD, P = 0.022; 58.33% vs 12.50% for CACRC/HGD vs LGD, P = 0.015). No significant difference existed between colitis-associated and non-colitic sporadic neoplasia. CONCLUSION: NTSR1 in colonic epithelial cells is overexpressed in IBD, in a stepwise fashion with sequential progress from inflammation to dysplasia and carcinoma.展开更多
目的:研究错配修复蛋白hMSH2与PTEN在散发性结直肠癌的表达变化及两者之间的关系,以进一步探讨其临床意义.方法:采用SP免疫组织化学两步法对42例散发性结直肠癌、相应近端癌旁组织(距癌组织3cm)和远端癌旁组织(距癌组织>10cm)及15例...目的:研究错配修复蛋白hMSH2与PTEN在散发性结直肠癌的表达变化及两者之间的关系,以进一步探讨其临床意义.方法:采用SP免疫组织化学两步法对42例散发性结直肠癌、相应近端癌旁组织(距癌组织3cm)和远端癌旁组织(距癌组织>10cm)及15例正常结直肠组织进行hMSH2与PTEN蛋白表达检测.同时Western blot法检测42例散发性结直肠癌、相应远端对照组织hMSH2与PTEN蛋白表达.分析散发性结直肠癌发病机制及hMSH2与PTEN蛋白表达与临床病理之间的关系.结果:结直肠癌组织中,hMSH2与PTEN蛋白失表达率(阴性率)均低于正常结直肠组织及近端癌旁组织、远端癌旁组织(χ2hM S H2=7.967,χ2PTEN=11.67,均P<0.05).PTEN蛋白表达与肿瘤分化程度呈正相关(rs=0.727,P<0.05),与Dukes分期、侵润深度、淋巴结转移、肝转移均呈负相关(rs=-0.727,-0.718,-0.718,-0.535,均P<0.05).hMSH2蛋白表达与上述临床病理特征未见明显相关.h M S H2与P T E N蛋白表达在散发性结直肠癌中呈正相关(rs=0.679,P<0.05).与远端对照组织相比42例胃癌组织中hMSH2蛋白低表达率为59.52%(25/42),PTEN低表达率为45.24%(19/42).结论:PTEN表达与其临床病理特征相关;在散发性结直肠癌发生、发展过程中错配修复蛋白hMSH2表达缺失伴有PTEN蛋白表达下调.展开更多
基金Supported by Calgary Laboratory Services Internally Supported Research, RS09-533
文摘AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of colonic mucosa with IBD colitis, colitis-associated raised low-grade dysplasia (LGD) including dysplasia-associated lesions or masses (DALMs, n = 18) and adenoma-like dysplastic polyps (ALDPs, n = 4), colitis-associated high-grade dysplasia (HGD, n = 11) and colitis-associated colorectal carcinoma (CACRC, n = 13), sporadic colorectal adenomatous polyp (SAP, n = 17), and sporadic colorectal carcinoma (SCRC, n = 12). The immunoreactivity of NTSR1 was semiquantitated (as negative, 1+, 2+, and 3+) and compared among different conditions.RESULTS: NTSR1 was not detected in normal mucosa but was expressed similarly in both active and inactive colitis. LGD showed a significantly stronger expression as compared with non-dysplastic colitic mucosa, with significantly more cases showing > 2+ intensity (68.75% in LGD vs 32.26% in nondysplastic mucosa, P = 0.001). However, no significant difference existed between DALMs and ALDPs. CACRC and HGD showed a further stronger expression, with significantly more cases showing 3+ intensity than that in LGD (61.54% vs 12.50% for CACRC vs LGD, P = 0.022; 58.33% vs 12.50% for CACRC/HGD vs LGD, P = 0.015). No significant difference existed between colitis-associated and non-colitic sporadic neoplasia. CONCLUSION: NTSR1 in colonic epithelial cells is overexpressed in IBD, in a stepwise fashion with sequential progress from inflammation to dysplasia and carcinoma.
文摘目的:研究错配修复蛋白hMSH2与PTEN在散发性结直肠癌的表达变化及两者之间的关系,以进一步探讨其临床意义.方法:采用SP免疫组织化学两步法对42例散发性结直肠癌、相应近端癌旁组织(距癌组织3cm)和远端癌旁组织(距癌组织>10cm)及15例正常结直肠组织进行hMSH2与PTEN蛋白表达检测.同时Western blot法检测42例散发性结直肠癌、相应远端对照组织hMSH2与PTEN蛋白表达.分析散发性结直肠癌发病机制及hMSH2与PTEN蛋白表达与临床病理之间的关系.结果:结直肠癌组织中,hMSH2与PTEN蛋白失表达率(阴性率)均低于正常结直肠组织及近端癌旁组织、远端癌旁组织(χ2hM S H2=7.967,χ2PTEN=11.67,均P<0.05).PTEN蛋白表达与肿瘤分化程度呈正相关(rs=0.727,P<0.05),与Dukes分期、侵润深度、淋巴结转移、肝转移均呈负相关(rs=-0.727,-0.718,-0.718,-0.535,均P<0.05).hMSH2蛋白表达与上述临床病理特征未见明显相关.h M S H2与P T E N蛋白表达在散发性结直肠癌中呈正相关(rs=0.679,P<0.05).与远端对照组织相比42例胃癌组织中hMSH2蛋白低表达率为59.52%(25/42),PTEN低表达率为45.24%(19/42).结论:PTEN表达与其临床病理特征相关;在散发性结直肠癌发生、发展过程中错配修复蛋白hMSH2表达缺失伴有PTEN蛋白表达下调.
