运用含有SYBR Green I的Real Time RT-PCR法分析SS基因在一年生三七根、茎、芦头3个部位中转录水平的相对表达差异。统计分析表明SS基因在根中的表达量最高。本研究取得了特异性高、重复性好的结果,标准曲线斜率均在-3.33~-4范围内,扩...运用含有SYBR Green I的Real Time RT-PCR法分析SS基因在一年生三七根、茎、芦头3个部位中转录水平的相对表达差异。统计分析表明SS基因在根中的表达量最高。本研究取得了特异性高、重复性好的结果,标准曲线斜率均在-3.33~-4范围内,扩增效率均在95%~100%之间,熔解曲线分析显示产物特异性的单一峰,为Real Time RT-PCR技术用于三七植物基因的差异表达分析建立了相应的技术平台。展开更多
The phylogenetic relationships of four ciliate genera (Urostyla, Euplotes, Stylonychia and Pseudokeronopsis), which also are the important environment inspection species, were analyzed by the comparison of small sub...The phylogenetic relationships of four ciliate genera (Urostyla, Euplotes, Stylonychia and Pseudokeronopsis), which also are the important environment inspection species, were analyzed by the comparison of small subunit ribosomal RNA gene sequences. Euplotes appeared as an early branching group whose divergence from the hypotrichous line at a deep level was strongly supported by parsimony and matrix analyses. The analyses also supported the hypothesis that there were closely relationship between species in Urostyla and Holosticha. The sibling species Stylonychia mytilus and S. lemnae could be separated by the evolutionary analyses. Furthermore, Pseudokeronopsis rubra had relatively more closely relationship with the species in Holostichidae than that in Urostylidae based on the evolutionary distance value.展开更多
文摘运用含有SYBR Green I的Real Time RT-PCR法分析SS基因在一年生三七根、茎、芦头3个部位中转录水平的相对表达差异。统计分析表明SS基因在根中的表达量最高。本研究取得了特异性高、重复性好的结果,标准曲线斜率均在-3.33~-4范围内,扩增效率均在95%~100%之间,熔解曲线分析显示产物特异性的单一峰,为Real Time RT-PCR技术用于三七植物基因的差异表达分析建立了相应的技术平台。
文摘目的:对Ro 60在胃癌多药耐药中的功能进行研究.方法:克隆Ro 60编码基因,构建Ro 60编码基因的正义真核表达载体,将其转导入SGC7901 细胞,应用半定量RT-PCR技术,对基因转染细胞进行鉴定,通过MTT法进行体外药物敏感性分析,借助流式细胞仪检测细胞内蓄积的阿霉素.结果:成功构建了Ro 60正义真核表达载体, 应用脂质体介导法将其转导入SGC7901,Ro 60真核表达载体转染SGC7901细胞后其表达量明显增加,体外药物敏感性试验提示其对长春新碱、5-氟尿嘧啶、丝裂霉素、顺铂、阿霉素的敏感性减低,SGC7901细胞的IC50值 (mg/L)与未转染细胞和转染空白载体细胞相比,显著增加(2.28±0.11 vs 0.45±0.04,0.65 ±0.05;2.89±0.14 vs 0.61±0.21,0.90±0.11; 1.92±0.03 vs 0.54±0.03,0.75±0.21;1.41± 0.06 vs 0.45±0.03,0.54±0.03;0.28±0.03 vs 0.14±0.01,0.14±0.01;均P<0.01),细胞内阿霉素蓄积显著减少(56.30±2.49 mg/L vs 92.83 ±3.63,87.38±2.94 mg/L,P<0.01).结论:Ro 60真核表达载体转染SGC7901细胞后显示了一些多药耐药的特性,提示Ro 60在胃癌多药耐药中发挥了一定的作用.
基金The research was supported by National Natural Science Foundation of China (No. 30470201)
文摘The phylogenetic relationships of four ciliate genera (Urostyla, Euplotes, Stylonychia and Pseudokeronopsis), which also are the important environment inspection species, were analyzed by the comparison of small subunit ribosomal RNA gene sequences. Euplotes appeared as an early branching group whose divergence from the hypotrichous line at a deep level was strongly supported by parsimony and matrix analyses. The analyses also supported the hypothesis that there were closely relationship between species in Urostyla and Holosticha. The sibling species Stylonychia mytilus and S. lemnae could be separated by the evolutionary analyses. Furthermore, Pseudokeronopsis rubra had relatively more closely relationship with the species in Holostichidae than that in Urostylidae based on the evolutionary distance value.