The GJB2 gene(connexin 26) has been shown to be responsible for DFNB1 and DFNA3. We screened the GJB2 gene in 488 patients with prelingual deafness(Group 1), 124 with postlingual deafness(Group 2), and 117 normal hear...The GJB2 gene(connexin 26) has been shown to be responsible for DFNB1 and DFNA3. We screened the GJB2 gene in 488 patients with prelingual deafness(Group 1), 124 with postlingual deafness(Group 2), and 117 normal hearing subjects(Group 3). We found that, in Group 1, 65 patients(13.32%) were homozygotes or compound heterozygotes and 51 patients (10.45%) carried a single pathogenic mutation. The 235delC mutation was the most frequent mutation, accounting for 73.22% of the known pathogenic alleles in Group 1. No homozygotes or compound heterozygotes were detected in Group 2 or Group 3. Some postlingual deaf patients (2.42%) and normal hearing subjects(4.27%) were 235delC carriers. Our preliminary data indicate that 235delC, the most frequent mutation identified in this study, is a major cause for prelingual deafness.展开更多
We studied the activity levels of matrix metalloproteinase 1, 2, and 9 in periovulatoryf luids from naturally occurring menstrual cycles versus those from samples taken from menstrual cycles stimulated with clomiphene...We studied the activity levels of matrix metalloproteinase 1, 2, and 9 in periovulatoryf luids from naturally occurring menstrual cycles versus those from samples taken from menstrual cycles stimulated with clomiphene citrate or recombinant stimulating hormone. No statistically significant differences were found.展开更多
目的利用RNAi技术下调宫颈癌HeLa细胞中cyclin E mRNA水平，研究对HeLa细胞增殖及周期的影响。方法构建针对cyclin E基因的RNAi真核表达载体，脂质体转染HeLa细胞下调细胞中cyclin E mRNA含量。RT-PCR检测抑制效果；MTr检测细胞生长情...目的利用RNAi技术下调宫颈癌HeLa细胞中cyclin E mRNA水平，研究对HeLa细胞增殖及周期的影响。方法构建针对cyclin E基因的RNAi真核表达载体，脂质体转染HeLa细胞下调细胞中cyclin E mRNA含量。RT-PCR检测抑制效果；MTr检测细胞生长情况；流式细胞仪分析HeLa细胞周期变化。结果成功构建针对cyclin E基因的RNAi真核表达载体，可以特异下调cyclin E mRNA含量，并抑制细胞恶性增殖。细胞周期分析显示干扰使细胞停留在G0-G。期，S期细胞明显减少。结论RNAi能特异地下调HeLa细胞中cyclin E mRNA含量，抑制宫颈癌细胞恶性增殖，提示cyclin E可能成为宫颈癌基因治疗中的一个新的靶点。展开更多
文摘The GJB2 gene(connexin 26) has been shown to be responsible for DFNB1 and DFNA3. We screened the GJB2 gene in 488 patients with prelingual deafness(Group 1), 124 with postlingual deafness(Group 2), and 117 normal hearing subjects(Group 3). We found that, in Group 1, 65 patients(13.32%) were homozygotes or compound heterozygotes and 51 patients (10.45%) carried a single pathogenic mutation. The 235delC mutation was the most frequent mutation, accounting for 73.22% of the known pathogenic alleles in Group 1. No homozygotes or compound heterozygotes were detected in Group 2 or Group 3. Some postlingual deaf patients (2.42%) and normal hearing subjects(4.27%) were 235delC carriers. Our preliminary data indicate that 235delC, the most frequent mutation identified in this study, is a major cause for prelingual deafness.
文摘We studied the activity levels of matrix metalloproteinase 1, 2, and 9 in periovulatoryf luids from naturally occurring menstrual cycles versus those from samples taken from menstrual cycles stimulated with clomiphene citrate or recombinant stimulating hormone. No statistically significant differences were found.
文摘目的利用RNAi技术下调宫颈癌HeLa细胞中cyclin E mRNA水平，研究对HeLa细胞增殖及周期的影响。方法构建针对cyclin E基因的RNAi真核表达载体，脂质体转染HeLa细胞下调细胞中cyclin E mRNA含量。RT-PCR检测抑制效果；MTr检测细胞生长情况；流式细胞仪分析HeLa细胞周期变化。结果成功构建针对cyclin E基因的RNAi真核表达载体，可以特异下调cyclin E mRNA含量，并抑制细胞恶性增殖。细胞周期分析显示干扰使细胞停留在G0-G。期，S期细胞明显减少。结论RNAi能特异地下调HeLa细胞中cyclin E mRNA含量，抑制宫颈癌细胞恶性增殖，提示cyclin E可能成为宫颈癌基因治疗中的一个新的靶点。
