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CYP4F2真核荧光表达载体的构建及其对HK2细胞ACE表达水平的影响

, PP. 194-197

Keywords: CYP4F2基因,真核表达,HK2细胞,ACE

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Abstract:

旨在构建重组CYP4F2基因真核绿色荧光蛋白表达载体pAcGFP-CYP4F2,并转染到人肾近曲小管上皮细胞HK2中表达,为研究CYP4F2在真核细胞中的功能提供一个有效的载体;对CYP4F2过表达对HK2细胞中血管紧张素转化酶(Angiotensinconvertingenzyme,ACE)表达的影响进行初步研究。从肝癌细胞HepG2中提取总RNA,反转录成cDNA模板,通过PCR扩增出CYP4F2目的片段,纯化后经限制性内切酶酶切,T4连接酶连接到pAcGFP1-C1载体上,转化E.coliDH5α宿主菌,获得阳性克隆;通过PCR扩增、双酶切鉴定和测序分析,确认重组质粒完整正确;抽提重组质粒,转染HK2细胞株,荧光显微镜观察荧光蛋白表达,RT-qPCR和Westernblot检测CYP4F2在细胞中mRNA表达。RT-qPCR检测ACE的表达。结果显示,CYP4F2基因目的片段成功重组,获得的重组质粒,保持了目的片段的特异性和序列完整性。荧光显微镜可观察到细胞内GFP的表达;RT-qPCR和Westernblot证实CYP4F2基因在转染的细胞内表达增高。RT-qPCR结果显示,转染重组质粒后细胞ACE表达有所增高。成功构建了真核绿色荧光蛋白表达载体pAcGFP-CYP4F2,CYP4F2过表达会提高HK2细胞ACE的mRNA水平。

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