ESTs fragments which represents corresponding novel genes were obtained by sequencing and bioinformatics analysis of human fet al kidney cDNA library. Microarray was prepared by using these novel EST fragmen ts by a...ESTs fragments which represents corresponding novel genes were obtained by sequencing and bioinformatics analysis of human fet al kidney cDNA library. Microarray was prepared by using these novel EST fragmen ts by automatic spotting. Expression patters of 79 ESTs of novel genes from huma n fetal kidney were analyzed in fetal brain and fetal heart tissues of 20\|week\ | and 26\|week\|age fetus by performing of cDNA chip hybridization. This provide s clues for studying exact functions of the novel genes. 8 genes were obtained w hich were expressed differentially in the fetal brain and heart of 20\|week\| an d 26\|week\|age respectively. Then differentially expressed genes were identifie d by Northern analysis. The more exact function of the novel genes is under stud y.展开更多
Background This investigation was undertaken to obtain differentially expressed genes related to human glioma using cDNA microarray and the characterization of one novel full-length gene. Methods Total RNA was extract...Background This investigation was undertaken to obtain differentially expressed genes related to human glioma using cDNA microarray and the characterization of one novel full-length gene. Methods Total RNA was extracted from human glioma tissues and normal brain tissues, and mRNA was used to make probes. After hybridization and washing, the results were scanned using a computer system. The gene named 681F05 clone was an expressed gene to human glioma through four-time hybridization and scanning. Subsequently northern blot analysis was performed by northern blot, 5’RACE and bioinformatics. Results Fifteen differentially expressed genes to human glioma were obtained through four-time hybridization and scanning. Northern blot analysis confirmed that 681F05 clone was low-expressed in human brain tissues and over-expressed in human glioma tissues. The analysis of BLASTn and BLASTx showed that 681F05 clone is two cDNA clones encoding two novel proteins that are highly identified to the cyclophilin isoform 10 of C. Elgans, respectively. Sequence analysis revealed the two cDNA clones are two different splicing variants of a novel cycophilin-like gene (PPIL3a and PPIL3b).Conclusions cDNA microarray technology can be successfully used to identify differentially expressed genes. The novel full-length gene of human PPIL3 may be correlated with the formation of human glioma.展开更多
以甘蓝型油菜新型恢复系NR1与不育系杂交后代可育植株幼小花蕾为材料,采用SMART（switching mechanism at 5′end of RNA transcript）技术构建了其全长cDNA文库.原始文库的滴度为5.2×107pfu/mL,重组率达96%.随机挑取21个噬菌斑,利...以甘蓝型油菜新型恢复系NR1与不育系杂交后代可育植株幼小花蕾为材料,采用SMART（switching mechanism at 5′end of RNA transcript）技术构建了其全长cDNA文库.原始文库的滴度为5.2×107pfu/mL,重组率达96%.随机挑取21个噬菌斑,利用PCR扩增插入片段,电泳结果显示其长度集中在0.7~2 kb之间,平均大小约为1.1 kb.采用铺平板法扩增文库,扩增后的文库滴度为4.3×1012pfu/mL.结果表明,所构建的文库达到了用于分离目的基因的建库要求,为后续恢复基因等重要功能基因全长cDNA的分离克隆奠定了基础.展开更多
文摘ESTs fragments which represents corresponding novel genes were obtained by sequencing and bioinformatics analysis of human fet al kidney cDNA library. Microarray was prepared by using these novel EST fragmen ts by automatic spotting. Expression patters of 79 ESTs of novel genes from huma n fetal kidney were analyzed in fetal brain and fetal heart tissues of 20\|week\ | and 26\|week\|age fetus by performing of cDNA chip hybridization. This provide s clues for studying exact functions of the novel genes. 8 genes were obtained w hich were expressed differentially in the fetal brain and heart of 20\|week\| an d 26\|week\|age respectively. Then differentially expressed genes were identifie d by Northern analysis. The more exact function of the novel genes is under stud y.
文摘Background This investigation was undertaken to obtain differentially expressed genes related to human glioma using cDNA microarray and the characterization of one novel full-length gene. Methods Total RNA was extracted from human glioma tissues and normal brain tissues, and mRNA was used to make probes. After hybridization and washing, the results were scanned using a computer system. The gene named 681F05 clone was an expressed gene to human glioma through four-time hybridization and scanning. Subsequently northern blot analysis was performed by northern blot, 5’RACE and bioinformatics. Results Fifteen differentially expressed genes to human glioma were obtained through four-time hybridization and scanning. Northern blot analysis confirmed that 681F05 clone was low-expressed in human brain tissues and over-expressed in human glioma tissues. The analysis of BLASTn and BLASTx showed that 681F05 clone is two cDNA clones encoding two novel proteins that are highly identified to the cyclophilin isoform 10 of C. Elgans, respectively. Sequence analysis revealed the two cDNA clones are two different splicing variants of a novel cycophilin-like gene (PPIL3a and PPIL3b).Conclusions cDNA microarray technology can be successfully used to identify differentially expressed genes. The novel full-length gene of human PPIL3 may be correlated with the formation of human glioma.
文摘以甘蓝型油菜新型恢复系NR1与不育系杂交后代可育植株幼小花蕾为材料,采用SMART（switching mechanism at 5′end of RNA transcript）技术构建了其全长cDNA文库.原始文库的滴度为5.2×107pfu/mL,重组率达96%.随机挑取21个噬菌斑,利用PCR扩增插入片段,电泳结果显示其长度集中在0.7~2 kb之间,平均大小约为1.1 kb.采用铺平板法扩增文库,扩增后的文库滴度为4.3×1012pfu/mL.结果表明,所构建的文库达到了用于分离目的基因的建库要求,为后续恢复基因等重要功能基因全长cDNA的分离克隆奠定了基础.
