目的分析有肝转移与无肝转移的结直肠癌微小RNA(microRNA,miRNA)表达的差异及其与结直肠癌肝转移(colorectal liver metastases,CRLM)发生的关系。方法收集2011年2月1日至2018年9月10日浙江大学医学院附属第二医院60例有肝转移(n=29)和...目的分析有肝转移与无肝转移的结直肠癌微小RNA(microRNA,miRNA)表达的差异及其与结直肠癌肝转移(colorectal liver metastases,CRLM)发生的关系。方法收集2011年2月1日至2018年9月10日浙江大学医学院附属第二医院60例有肝转移(n=29)和无肝转移(n=31)的结直肠癌新鲜标本,采用Agilent芯片检测miRNA表达,利用Gene Spring GX v11.5.1软件筛选出差异表达的miRNA。进一步收集2003年3月1日至2012年12月31日浙江大学医学院附属第二医院62例有肝转移(n=31)和无肝转移(n=31)的结直肠癌4%甲醛固定的石蜡包埋(formalin-fixed and paraffinembedded,FFPE)标本,对差异miRNA表达进行验证。利用Gene Ontology(GO)功能数据库及Kyoto Encyclopedia of Genes and Genomes(KEGG)数据库进行靶基因的信号通路的富集,推测CRLM相关通路。TCGA数据库分析CRLM组织与正常肝脏组织中miR494、miR19a、miR223和miR20a的表达。通过反向传播(back propagation,BP)神经网络模型构建CRLM的预测模型。结果对新鲜结直肠癌样本肝转移组和无肝转移组进行miRNA芯片分析,筛选出差异表达的miRNA,包括miR19a、miR20a、miR223和miR494。实时定量PCR(quantitative real-time PCR,qRT-PCR)验证显示,FFPE肝转移组和无肝转移组miR19a、miR20a、miR223和miR494的表达水平比较,差异均具有统计学意义(均P<0.05)。Kaplan-Meier法分析显示,FFPE肝转移组miR494、miR19a和miR223高表达和低表达患者总生存期比较,差异均具有统计学意义(均P<0.05)。TCGA数据库分析显示,miR494、miR19a、miR223和miR20a在正常肝脏组织和CRLM组织中的表达比较,差异均具有统计学意义(均P<0.05)。通过BP神经网络模型构建miR494、miR19a、miR223和miR20a联合预测CRLM发生的准确度高,曲线下面积(area under the curve,AUC)为1.000。结论miR494、miR19a、miR223和miR20a在CRLM患者原发灶中差异表达,与患者生存相关。miR494、miR19a、miR223和miR20a共同预测CRLM发生的准确度高。展开更多
结直肠癌是我国常见癌症之一。30年来,结直肠癌发病率年均上升3%~4%,但地区差异较大,如上海2012年发病率达56/10万。从全局看,我国结直肠癌发病仍暂处非高发水平。世界卫生组织国家癌症研究代表处（Internatinal Agency for Research on...结直肠癌是我国常见癌症之一。30年来,结直肠癌发病率年均上升3%~4%,但地区差异较大,如上海2012年发病率达56/10万。从全局看,我国结直肠癌发病仍暂处非高发水平。世界卫生组织国家癌症研究代表处（Internatinal Agency for Research on Cancer,IARC）发表的Globocan 2012估算中国大陆结直肠癌标化发病率为14.2/10万。展开更多
Objective: To characterize the expression of ST13 protein in human tissuesfor investigation of the function of colorectal cancer related gene ST13. Methods: ST13 ORF wascloned and over-expressed in E.coli. The recombi...Objective: To characterize the expression of ST13 protein in human tissuesfor investigation of the function of colorectal cancer related gene ST13. Methods: ST13 ORF wascloned and over-expressed in E.coli. The recombinant ST13 protein was purified by affinitychromatography. ST13 monoclonal antibodies were generated and affinity purified with the recombinantprotein. Immunoblot and immunohistochemical staining were employed to analyze ST13 proteinexpression in human tissues. Results: The expression and purification of the recombinant ST13protein were confirmed by SDS-PAGE. The protein yield reached about 2.5 mg/L of induced bacterialculture with a purity of 91.3%. Three strains of hybridoma were obtained with antibody titers from10~4 to 10~5 in ascites fluids and with high specificity for ST13 protein. Immunoblot showed thatthe apparent Mr of ST13 protein in SW480 cells and human tissues estimated by SDS-PAGE mobility wasapproximately 50 000, which was about 10 000 larger than the 41 324 calculated, but theglycosylation of the protein was excluded. Computer modeling revealed the protein to be ahydrophilic molecule. Immunohistochemical staining showed that ST13 protein was evenly distributedin cytoplasm and expressed in colon, stomach, liver, and other epithelial cells. Differences in thestaining intensity of the protein were observed between normal and cancer tissues as well as amongdifferent normal or carcinoma tissues. Conclusion: ST13 protein is a cytoplasmic molecule with anapparent Mr of 50 000. The protein is expressed in colorectal and other epithelial tissues. Theexpression level of the protein is down-regulated in colorectal cancer and varies among differentnormal and/or carcinoma tissues. Comparison of cDNA sequences and protein characteristics indicatesthat ST13 protein and hsp70-interacting protein (Hip) are same proteins, raising the possibilitythat ST13 protein is involved in the development of colorectal cancer through Hsp70 molecularchaperone machinery.展开更多
文摘目的分析有肝转移与无肝转移的结直肠癌微小RNA(microRNA,miRNA)表达的差异及其与结直肠癌肝转移(colorectal liver metastases,CRLM)发生的关系。方法收集2011年2月1日至2018年9月10日浙江大学医学院附属第二医院60例有肝转移(n=29)和无肝转移(n=31)的结直肠癌新鲜标本,采用Agilent芯片检测miRNA表达,利用Gene Spring GX v11.5.1软件筛选出差异表达的miRNA。进一步收集2003年3月1日至2012年12月31日浙江大学医学院附属第二医院62例有肝转移(n=31)和无肝转移(n=31)的结直肠癌4%甲醛固定的石蜡包埋(formalin-fixed and paraffinembedded,FFPE)标本,对差异miRNA表达进行验证。利用Gene Ontology(GO)功能数据库及Kyoto Encyclopedia of Genes and Genomes(KEGG)数据库进行靶基因的信号通路的富集,推测CRLM相关通路。TCGA数据库分析CRLM组织与正常肝脏组织中miR494、miR19a、miR223和miR20a的表达。通过反向传播(back propagation,BP)神经网络模型构建CRLM的预测模型。结果对新鲜结直肠癌样本肝转移组和无肝转移组进行miRNA芯片分析,筛选出差异表达的miRNA,包括miR19a、miR20a、miR223和miR494。实时定量PCR(quantitative real-time PCR,qRT-PCR)验证显示,FFPE肝转移组和无肝转移组miR19a、miR20a、miR223和miR494的表达水平比较,差异均具有统计学意义(均P<0.05)。Kaplan-Meier法分析显示,FFPE肝转移组miR494、miR19a和miR223高表达和低表达患者总生存期比较,差异均具有统计学意义(均P<0.05)。TCGA数据库分析显示,miR494、miR19a、miR223和miR20a在正常肝脏组织和CRLM组织中的表达比较,差异均具有统计学意义(均P<0.05)。通过BP神经网络模型构建miR494、miR19a、miR223和miR20a联合预测CRLM发生的准确度高,曲线下面积(area under the curve,AUC)为1.000。结论miR494、miR19a、miR223和miR20a在CRLM患者原发灶中差异表达,与患者生存相关。miR494、miR19a、miR223和miR20a共同预测CRLM发生的准确度高。
文摘结直肠癌是我国常见癌症之一。30年来,结直肠癌发病率年均上升3%~4%,但地区差异较大,如上海2012年发病率达56/10万。从全局看,我国结直肠癌发病仍暂处非高发水平。世界卫生组织国家癌症研究代表处（Internatinal Agency for Research on Cancer,IARC）发表的Globocan 2012估算中国大陆结直肠癌标化发病率为14.2/10万。
文摘Objective: To characterize the expression of ST13 protein in human tissuesfor investigation of the function of colorectal cancer related gene ST13. Methods: ST13 ORF wascloned and over-expressed in E.coli. The recombinant ST13 protein was purified by affinitychromatography. ST13 monoclonal antibodies were generated and affinity purified with the recombinantprotein. Immunoblot and immunohistochemical staining were employed to analyze ST13 proteinexpression in human tissues. Results: The expression and purification of the recombinant ST13protein were confirmed by SDS-PAGE. The protein yield reached about 2.5 mg/L of induced bacterialculture with a purity of 91.3%. Three strains of hybridoma were obtained with antibody titers from10~4 to 10~5 in ascites fluids and with high specificity for ST13 protein. Immunoblot showed thatthe apparent Mr of ST13 protein in SW480 cells and human tissues estimated by SDS-PAGE mobility wasapproximately 50 000, which was about 10 000 larger than the 41 324 calculated, but theglycosylation of the protein was excluded. Computer modeling revealed the protein to be ahydrophilic molecule. Immunohistochemical staining showed that ST13 protein was evenly distributedin cytoplasm and expressed in colon, stomach, liver, and other epithelial cells. Differences in thestaining intensity of the protein were observed between normal and cancer tissues as well as amongdifferent normal or carcinoma tissues. Conclusion: ST13 protein is a cytoplasmic molecule with anapparent Mr of 50 000. The protein is expressed in colorectal and other epithelial tissues. Theexpression level of the protein is down-regulated in colorectal cancer and varies among differentnormal and/or carcinoma tissues. Comparison of cDNA sequences and protein characteristics indicatesthat ST13 protein and hsp70-interacting protein (Hip) are same proteins, raising the possibilitythat ST13 protein is involved in the development of colorectal cancer through Hsp70 molecularchaperone machinery.
