目的:研究支原体感染对人类细胞株的核糖体新生肽链复合体(RNC)中rRNA组成的影响及其相关机制。方法:分别提取支原体阳性与阴性RNC-RNA进行琼脂糖凝胶电泳,分析RNC-rRNA组成改变情况;在支原体污染环境中培养人正常肺上皮(HBE)细胞,比较...目的:研究支原体感染对人类细胞株的核糖体新生肽链复合体(RNC)中rRNA组成的影响及其相关机制。方法:分别提取支原体阳性与阴性RNC-RNA进行琼脂糖凝胶电泳,分析RNC-rRNA组成改变情况;在支原体污染环境中培养人正常肺上皮(HBE)细胞,比较培养前后RNC-rRNA的变化;对RNC-RNA条带异常细胞进行抗支原体治疗,比较治疗前后RNC-rRNA的变化。利用免疫印迹分析支原体污染对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)途径的影响。结果:不同组织来源的多株细胞中,支原体阴性和阳性细胞RNCRNA的琼脂糖电泳显示细胞中RNC-rRNA组成发生异常改变,主要体现为28S和18S真核rRNA的降低,以及16S和未知原核rRNA的增加。在污染环境中培养HBE细胞,其RNC-rRNA组成可由支原体阴性转变为阳性谱型。以环丙沙星抗支原体治疗可逆转上述RNC-rRNA谱型的改变。总蛋白和磷酸化蛋白的免疫印记结果表明,支原体污染显著抑制A549细胞的p38 MAPK途径的活化,而对该细胞的ERK1/2途径无显著改变。结论:支原体感染可通过抑制p38 MAPK活化严重改变人类细胞株中RNC-rRNA的组成,从而影响宿主细胞的翻译行为。展开更多
The phase transition and microenvironment properties of the vesicles from tri-ethanolamine dilaurate(2RNC2) in the diluted solution of chloride acid have been studied by meansof DSC and fluorescence method. It is sh...The phase transition and microenvironment properties of the vesicles from tri-ethanolamine dilaurate(2RNC2) in the diluted solution of chloride acid have been studied by meansof DSC and fluorescence method. It is shown that the micropolarity of the vesicles increased withthe decrease of the pH value of the solution, but the phase transition temperature, microviscosityof the vesicles approached the maximum values within pH 23 range. The foaming ability of thesolution also reached the best effect within the same pH range.展开更多
文摘目的:研究支原体感染对人类细胞株的核糖体新生肽链复合体(RNC)中rRNA组成的影响及其相关机制。方法:分别提取支原体阳性与阴性RNC-RNA进行琼脂糖凝胶电泳,分析RNC-rRNA组成改变情况;在支原体污染环境中培养人正常肺上皮(HBE)细胞,比较培养前后RNC-rRNA的变化;对RNC-RNA条带异常细胞进行抗支原体治疗,比较治疗前后RNC-rRNA的变化。利用免疫印迹分析支原体污染对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)途径的影响。结果:不同组织来源的多株细胞中,支原体阴性和阳性细胞RNCRNA的琼脂糖电泳显示细胞中RNC-rRNA组成发生异常改变,主要体现为28S和18S真核rRNA的降低,以及16S和未知原核rRNA的增加。在污染环境中培养HBE细胞,其RNC-rRNA组成可由支原体阴性转变为阳性谱型。以环丙沙星抗支原体治疗可逆转上述RNC-rRNA谱型的改变。总蛋白和磷酸化蛋白的免疫印记结果表明,支原体污染显著抑制A549细胞的p38 MAPK途径的活化,而对该细胞的ERK1/2途径无显著改变。结论:支原体感染可通过抑制p38 MAPK活化严重改变人类细胞株中RNC-rRNA的组成,从而影响宿主细胞的翻译行为。
文摘The phase transition and microenvironment properties of the vesicles from tri-ethanolamine dilaurate(2RNC2) in the diluted solution of chloride acid have been studied by meansof DSC and fluorescence method. It is shown that the micropolarity of the vesicles increased withthe decrease of the pH value of the solution, but the phase transition temperature, microviscosityof the vesicles approached the maximum values within pH 23 range. The foaming ability of thesolution also reached the best effect within the same pH range.