应用蛋白组学技术筛选硝酸铀酰暴露诱导CHO-K1细胞损伤的差异表达蛋白,为铀毒性机制研究提供数据.CHO-K1细胞经500μmol/L硝酸铀酰染毒24 h,以差异倍数大于1.5倍,差异显著性小于0.05为标准,采用串联质谱标签(tandem mass tag,TMT)标记...应用蛋白组学技术筛选硝酸铀酰暴露诱导CHO-K1细胞损伤的差异表达蛋白,为铀毒性机制研究提供数据.CHO-K1细胞经500μmol/L硝酸铀酰染毒24 h,以差异倍数大于1.5倍,差异显著性小于0.05为标准,采用串联质谱标签(tandem mass tag,TMT)标记蛋白组学技术筛选差异表达蛋白,应用生物信息学技术对差异表达蛋白进行聚类分析、基因本体(Gene Ontology,GO)分析、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析及蛋白相互作用分析.共鉴定出蛋白4772个,硝酸铀酰染毒组筛选出差异表达1.5倍以上的蛋白309个,其中164个表达上调,145个表达下调.GO分析结果显示差异表达的蛋白主要参与1086种生物过程、282种细胞成分以及377类分子功能.KEGG分析结果显示差异表达蛋白主要富集于40条信号转导通路,参与核糖体生物合成、RNA运输、辅因子代谢、Notch信号通路、吞噬体、染色体及相关蛋白、蛋白质外排、生理节律、IL-17信号通路、类脂物代谢等信号通路.差异蛋白相互作用网络分析结果显示蛋白RPS3A和RPS17的关联度最高.研究结果表明,CHO-K1细胞经500μmol/L硝酸铀酰染毒24 h后,蛋白发生差异表达,核糖体生物合成、RNA运输等多条信号通路发生改变,蛋白RPS3A和RPS17可能是硝酸铀酰暴露致CHO-K1细胞损伤的关键蛋白.展开更多
以CHO-K1细胞为研究对象,首先对贴壁细胞进行了悬浮驯化,之后比较了自配无血清培养基CHO-SFM、Sigma Ex-CELL CD CHO培养基和Gibco CD CHO培养基驯化悬浮细胞CHO-K1-S的培养效果。在相同实验条件下,统计细胞的增长率和存活率。结果表明...以CHO-K1细胞为研究对象,首先对贴壁细胞进行了悬浮驯化,之后比较了自配无血清培养基CHO-SFM、Sigma Ex-CELL CD CHO培养基和Gibco CD CHO培养基驯化悬浮细胞CHO-K1-S的培养效果。在相同实验条件下,统计细胞的增长率和存活率。结果表明,自配无血清培养基CHO-SFM优于Sigma CD-CHO和Gibco CD-CHO两种商业化培养基。展开更多
[Objective] To investigate the possibilities of expressing bovine PrP27-30 gene in CHO-K1 cells. [Method] The purified PCR products of PrP27-30 were digested and ligated to the pCI-neo vector to yield pCI-neo-PrP27-30...[Objective] To investigate the possibilities of expressing bovine PrP27-30 gene in CHO-K1 cells. [Method] The purified PCR products of PrP27-30 were digested and ligated to the pCI-neo vector to yield pCI-neo-PrP27-30 that was used as an expression vector. Then CHO-K1 cells were transfected by pCI-neo-PrP27-30, and stable expression clone cells were screened by methotrexate (MTX) at a concentration of 0.1 and 1.0 umol/L. The transient expression was detected by indirect immunofluorescence assay and western blot. [ Result] After drug selection with MTX, the expression of PrP27-30 gene was detected in CHO-K1 cells. [Conclusion] Recombinant protein PrP27-30 expressed in CHO-K1 cells has better immunoreactivity and can be used to study secondary structure and regulation mechanism of pathological isoform of prion protein (prpC).展开更多
文摘应用蛋白组学技术筛选硝酸铀酰暴露诱导CHO-K1细胞损伤的差异表达蛋白,为铀毒性机制研究提供数据.CHO-K1细胞经500μmol/L硝酸铀酰染毒24 h,以差异倍数大于1.5倍,差异显著性小于0.05为标准,采用串联质谱标签(tandem mass tag,TMT)标记蛋白组学技术筛选差异表达蛋白,应用生物信息学技术对差异表达蛋白进行聚类分析、基因本体(Gene Ontology,GO)分析、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析及蛋白相互作用分析.共鉴定出蛋白4772个,硝酸铀酰染毒组筛选出差异表达1.5倍以上的蛋白309个,其中164个表达上调,145个表达下调.GO分析结果显示差异表达的蛋白主要参与1086种生物过程、282种细胞成分以及377类分子功能.KEGG分析结果显示差异表达蛋白主要富集于40条信号转导通路,参与核糖体生物合成、RNA运输、辅因子代谢、Notch信号通路、吞噬体、染色体及相关蛋白、蛋白质外排、生理节律、IL-17信号通路、类脂物代谢等信号通路.差异蛋白相互作用网络分析结果显示蛋白RPS3A和RPS17的关联度最高.研究结果表明,CHO-K1细胞经500μmol/L硝酸铀酰染毒24 h后,蛋白发生差异表达,核糖体生物合成、RNA运输等多条信号通路发生改变,蛋白RPS3A和RPS17可能是硝酸铀酰暴露致CHO-K1细胞损伤的关键蛋白.
文摘以CHO-K1细胞为研究对象,首先对贴壁细胞进行了悬浮驯化,之后比较了自配无血清培养基CHO-SFM、Sigma Ex-CELL CD CHO培养基和Gibco CD CHO培养基驯化悬浮细胞CHO-K1-S的培养效果。在相同实验条件下,统计细胞的增长率和存活率。结果表明,自配无血清培养基CHO-SFM优于Sigma CD-CHO和Gibco CD-CHO两种商业化培养基。
基金supported by grants from the National Natural Science Foundation (30671563 and 30700597)Key Project of Science and Technology of GanSu Province (0801NKDA034)the Development Planning Project of Science and Technology of Lanzhou (07-2-12 and 2008-1-167)
文摘[Objective] To investigate the possibilities of expressing bovine PrP27-30 gene in CHO-K1 cells. [Method] The purified PCR products of PrP27-30 were digested and ligated to the pCI-neo vector to yield pCI-neo-PrP27-30 that was used as an expression vector. Then CHO-K1 cells were transfected by pCI-neo-PrP27-30, and stable expression clone cells were screened by methotrexate (MTX) at a concentration of 0.1 and 1.0 umol/L. The transient expression was detected by indirect immunofluorescence assay and western blot. [ Result] After drug selection with MTX, the expression of PrP27-30 gene was detected in CHO-K1 cells. [Conclusion] Recombinant protein PrP27-30 expressed in CHO-K1 cells has better immunoreactivity and can be used to study secondary structure and regulation mechanism of pathological isoform of prion protein (prpC).
