差异表达分析常被用于各种疾病标志物的筛选研究中,如传统的t检验、显著性分析(significance of microarrays,SAM)检验、偏最小二乘(pa least square,PLS)等方法。然而,这些方法主要是通过比较不同分组之间基因表达均值的差异筛选标记物...差异表达分析常被用于各种疾病标志物的筛选研究中,如传统的t检验、显著性分析(significance of microarrays,SAM)检验、偏最小二乘(pa least square,PLS)等方法。然而,这些方法主要是通过比较不同分组之间基因表达均值的差异筛选标记物,忽视了物质之间的相互调控关系,致使研究结果不够稳定或检验效率低。在组学研究中,由于基因调控和蛋白质的互相作用,很有可能在表达量上还没有呈现出明显差别时.展开更多
ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a ...ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a kind of chemical-material-coated-glass slides. The total RNAs were isolated from the tissues. Both the mRNAs from the degeneration and normal lumbar intervertebral disc in humans were reversely transcribed to the cDNAs, which used as the hybridization probes with the incorporations of fluorescent dUTP. The mixed probes were then hybridized to the cDNA microarray. After high-stringent washing, the cDNA microarray was scanned for the fluorescent signals and analyzed with computer image analysis. ResultsAmong the 4096 targets, there were 706 genes whose expression levels differed between the degeneration and normal lumbar intervertebral disc in all cases, comprising 298 up-regulated and 358 down-regulated ones. ConclusionDNA microarray technology is an effective technique in screening for differently expressed genes between the degeneration and normal lumbar intervertebral disc. Cell apoptosis plays an important role in the process of lumbar intervertebral disc degeneration.展开更多
文摘差异表达分析常被用于各种疾病标志物的筛选研究中,如传统的t检验、显著性分析(significance of microarrays,SAM)检验、偏最小二乘(pa least square,PLS)等方法。然而,这些方法主要是通过比较不同分组之间基因表达均值的差异筛选标记物,忽视了物质之间的相互调控关系,致使研究结果不够稳定或检验效率低。在组学研究中,由于基因调控和蛋白质的互相作用,很有可能在表达量上还没有呈现出明显差别时.
文摘ObjectiveTo investigate the gene expression changes in normal and degeneration lumbar intervertebral disc in humans, providing information for clinical. MethodsThe PCR products of 4096 human genes were spotted onto a kind of chemical-material-coated-glass slides. The total RNAs were isolated from the tissues. Both the mRNAs from the degeneration and normal lumbar intervertebral disc in humans were reversely transcribed to the cDNAs, which used as the hybridization probes with the incorporations of fluorescent dUTP. The mixed probes were then hybridized to the cDNA microarray. After high-stringent washing, the cDNA microarray was scanned for the fluorescent signals and analyzed with computer image analysis. ResultsAmong the 4096 targets, there were 706 genes whose expression levels differed between the degeneration and normal lumbar intervertebral disc in all cases, comprising 298 up-regulated and 358 down-regulated ones. ConclusionDNA microarray technology is an effective technique in screening for differently expressed genes between the degeneration and normal lumbar intervertebral disc. Cell apoptosis plays an important role in the process of lumbar intervertebral disc degeneration.
