目的探讨结直肠癌细胞中EpCAM(CD326)表达的临床病理学意义及与DNA倍体改变的关系。方法应用流式细胞直接免疫荧光法检测55例结直肠癌组织及癌旁正常黏膜组织中EpCAM的表达,用阳性率(percentage of positive cells,PPC)、平均荧光强度(m...目的探讨结直肠癌细胞中EpCAM(CD326)表达的临床病理学意义及与DNA倍体改变的关系。方法应用流式细胞直接免疫荧光法检测55例结直肠癌组织及癌旁正常黏膜组织中EpCAM的表达,用阳性率(percentage of positive cells,PPC)、平均荧光强度(mean fluorescence index,MFI)表示;应用细胞周期分析仪对结直肠癌细胞进行细胞周期分析。用细胞定量术分析EpCAM表达和DNA倍体改变的相关性及其在结直肠癌早期诊断、预后中的价值。结果 55例结直肠癌组织中EpCAM蛋白的PPC为(83.48±7.07)%,明显高于癌旁正常黏膜组织(43.56±5.29)%(t=39.22,P<0.001)。55例结直肠癌组织中EpCAM蛋白MFI值为28.90(19.60~45.89),明显高于癌旁正常黏膜组织的4.89(3.79~6.28)(Z=-6.45,P<0.001)。癌组织:浸润型+溃疡型vs肿块型(包括浸润型vs溃疡型),中+低分化vs高分化(包括低分化vs中分化),Dukes分期C+D vs A+B,p TNM分期Ⅲ+ⅣvsⅠ+Ⅱ,浸润深度pT3+T4 vs pT1+T2,淋巴结转移pN1 vs pN0,差异均有统计学意义,即生物学行为越差,EpCAM蛋白表达MFI值与PPC越高,而与患者年龄、性别无关。DNA含量分析结果显示:55例结直肠癌中39例(70.90%)为多倍体,DNA指数(DNA index,DI)和DNA倍体与肿瘤分化程度、Dukes分期相关,与淋巴结转移无关。同时,在EpCAM阳性病例中,DI随着EpCAM表达增强而升高(r=0.668,P=0.000);而增殖指标S期细胞比率(S-phase fraction,SPF)和增殖指数(proliferation index,PI)也随着EpCAM表达增强而升高(r_1=0.664,P_1=0.000;r_2=0.651,P_2=0.000)。结论EpCAM在结直肠癌中的表达明显上调,与肿瘤细胞侵袭转移、增殖密切相关,同时检测EpCAM表达和DNA含量分析能为结直肠癌早期诊断和预后判断提供参考依据。展开更多
Through the widespread implementation of next-generation sequencing （NGS）, analyses of the whole genome （the entire DNA content） and the whole transcriptome （the genes being expressed） are becoming commonplace. ...Through the widespread implementation of next-generation sequencing （NGS）, analyses of the whole genome （the entire DNA content） and the whole transcriptome （the genes being expressed） are becoming commonplace. NGS enables the analysis of a vast amount of previously unattainable genetic information. Despite this potential, NGS has yet to be widely imple- mented in genetic studies of biological invasions. The study of the genomic causes and consequences of biological invasions al- lows a deeper understanding of the molecular mechanisms underpinning the invasion process. In this review, we present a brief introduction to NGS followed by a synthesis of current research in the genomics and transcriptomics of adaptation and coloniza- tion. We then highlight research opportunities in the field, including： （1） assembling genomes and transcriptomes of non-model organisms, （2） identifying genomic regions and candidate genes underlying evolutionary processes, and （3） studying the adaptive role of gene expression variation. In particular, because introduced species face a broad range of physiological and biotic chal- lenges when colonizing novel and variable environments, transcriptomics will enable the study of gene regulatory pathways that may be responsible for acclimation or adaptation. To conclude, we identify a number of research approaches that will aid our fu- ture understanding of biological invasions展开更多
文摘目的探讨结直肠癌细胞中EpCAM(CD326)表达的临床病理学意义及与DNA倍体改变的关系。方法应用流式细胞直接免疫荧光法检测55例结直肠癌组织及癌旁正常黏膜组织中EpCAM的表达,用阳性率(percentage of positive cells,PPC)、平均荧光强度(mean fluorescence index,MFI)表示;应用细胞周期分析仪对结直肠癌细胞进行细胞周期分析。用细胞定量术分析EpCAM表达和DNA倍体改变的相关性及其在结直肠癌早期诊断、预后中的价值。结果 55例结直肠癌组织中EpCAM蛋白的PPC为(83.48±7.07)%,明显高于癌旁正常黏膜组织(43.56±5.29)%(t=39.22,P<0.001)。55例结直肠癌组织中EpCAM蛋白MFI值为28.90(19.60~45.89),明显高于癌旁正常黏膜组织的4.89(3.79~6.28)(Z=-6.45,P<0.001)。癌组织:浸润型+溃疡型vs肿块型(包括浸润型vs溃疡型),中+低分化vs高分化(包括低分化vs中分化),Dukes分期C+D vs A+B,p TNM分期Ⅲ+ⅣvsⅠ+Ⅱ,浸润深度pT3+T4 vs pT1+T2,淋巴结转移pN1 vs pN0,差异均有统计学意义,即生物学行为越差,EpCAM蛋白表达MFI值与PPC越高,而与患者年龄、性别无关。DNA含量分析结果显示:55例结直肠癌中39例(70.90%)为多倍体,DNA指数(DNA index,DI)和DNA倍体与肿瘤分化程度、Dukes分期相关,与淋巴结转移无关。同时,在EpCAM阳性病例中,DI随着EpCAM表达增强而升高(r=0.668,P=0.000);而增殖指标S期细胞比率(S-phase fraction,SPF)和增殖指数(proliferation index,PI)也随着EpCAM表达增强而升高(r_1=0.664,P_1=0.000;r_2=0.651,P_2=0.000)。结论EpCAM在结直肠癌中的表达明显上调,与肿瘤细胞侵袭转移、增殖密切相关,同时检测EpCAM表达和DNA含量分析能为结直肠癌早期诊断和预后判断提供参考依据。
文摘Through the widespread implementation of next-generation sequencing （NGS）, analyses of the whole genome （the entire DNA content） and the whole transcriptome （the genes being expressed） are becoming commonplace. NGS enables the analysis of a vast amount of previously unattainable genetic information. Despite this potential, NGS has yet to be widely imple- mented in genetic studies of biological invasions. The study of the genomic causes and consequences of biological invasions al- lows a deeper understanding of the molecular mechanisms underpinning the invasion process. In this review, we present a brief introduction to NGS followed by a synthesis of current research in the genomics and transcriptomics of adaptation and coloniza- tion. We then highlight research opportunities in the field, including： （1） assembling genomes and transcriptomes of non-model organisms, （2） identifying genomic regions and candidate genes underlying evolutionary processes, and （3） studying the adaptive role of gene expression variation. In particular, because introduced species face a broad range of physiological and biotic chal- lenges when colonizing novel and variable environments, transcriptomics will enable the study of gene regulatory pathways that may be responsible for acclimation or adaptation. To conclude, we identify a number of research approaches that will aid our fu- ture understanding of biological invasions
