目的探讨不同商品化试剂盒在提取组织总RNA过程中的优劣与适用范围,为实验室的质量控制提供依据。方法采用以膜提取技术为基础(SV total RNA isolation system)和以异硫氰酸胍/苯酚法为原理(TRIzol总RNA提取试剂盒)的两种试剂盒对死亡...目的探讨不同商品化试剂盒在提取组织总RNA过程中的优劣与适用范围,为实验室的质量控制提供依据。方法采用以膜提取技术为基础(SV total RNA isolation system)和以异硫氰酸胍/苯酚法为原理(TRIzol总RNA提取试剂盒)的两种试剂盒对死亡大鼠心、肝、脾、肺、肾、脑组织进行总RNA的提取与评价鉴定,并使用琼脂糖变性凝胶电泳和2100芯片生物分析仪对提取的总RNA进行完整性鉴定和质量控制评价。结果两种商品化试剂盒提取的总RNA纯度与得率均可满足实验要求。各组织脏器中总RNA得率依次为脾脏>肝脏>肾脏>大脑>肺脏>心脏。结论与TRIzol总RNA提取试剂盒相比,SV Total RNA Isolation System提取时对操作人员熟练度要求较低,2100芯片生物分析仪有望替代凝胶电泳技术用于总RNA提取时的质量控制。展开更多
使用生工柱式植物总RNA抽提纯化试剂盒、Trnzol法以及改良CTAB 3种方法,提取红肉苹果克孜阿尔玛的果肉、果皮、花瓣、叶片中的总RNA,并对比这3种方法提取RNA的产量、质量以及完整性。结果表明,由Trnzol方法提取所获得的RNA纯度较低,有...使用生工柱式植物总RNA抽提纯化试剂盒、Trnzol法以及改良CTAB 3种方法,提取红肉苹果克孜阿尔玛的果肉、果皮、花瓣、叶片中的总RNA,并对比这3种方法提取RNA的产量、质量以及完整性。结果表明,由Trnzol方法提取所获得的RNA纯度较低,有降解现象,且有DNA、蛋白质的污染,果肉和果皮RNA的产量也并不理想;而用改良CTAB法和生工试剂盒法提取的RNA较少降解,所得28 S rRNA和18 S rRNA条带较为清晰,花瓣和叶片的OD260/280均在2以上,生工试剂盒法提取的RNA产量高,OD260/280和OD260/230比值均在1.8~2.5,条带的完整性好。3种方法比较而言,改良CTAB法和Tr Nzol法提取的RNA条带的清晰度、产量及质量都低于生工试剂盒法。展开更多
[Objective] The aim of this study was to realize efficient expression of the porcine reproductive and respiratory syndrome virus （PRRSV） ORF7 gene in genetic engineering bacteria and analYze the immunological activi...[Objective] The aim of this study was to realize efficient expression of the porcine reproductive and respiratory syndrome virus （PRRSV） ORF7 gene in genetic engineering bacteria and analYze the immunological activity of the recombinant protein after purification. [ Method] The constructed recombinant expression vector pET-ORF7 was transformed into Escherichia co1BL21 （DE3） and induced by IPTG under the optimal condition. After analysis of SDS-PAGE and Western Blot, the expression products were purified by Ni-NTA His · Bind Resin chrom- atographic column under denaturing condition and renatured by gradient dialysis. Subsequently, the immunological activity of the renatured recombinant protein was detected by Westem Blot and indirect ELISA. [ Result] The recombinant plasmid pET-ORF7 expressed in E. coli successfully, and the fusion protein was in the form of inclusion body. By SDS-PAGE detection, the molecular weight of the expression protein was approximate 33 kD, according with the expectation. Analysis by Bandscan software showed that the expressed fusion protein was about 50% of total bacterial protein of BL21 （DE3）. Wastem Blot and indirect ELISA detection showed that the renatured protein could react with PRRSV positive serum specifically, indicating its good immunological activity. [ Conclusion] This study lays a foundation for the preparation of PRRSV monoclonal antibody and diagnostic kit.展开更多
文摘目的探讨不同商品化试剂盒在提取组织总RNA过程中的优劣与适用范围,为实验室的质量控制提供依据。方法采用以膜提取技术为基础(SV total RNA isolation system)和以异硫氰酸胍/苯酚法为原理(TRIzol总RNA提取试剂盒)的两种试剂盒对死亡大鼠心、肝、脾、肺、肾、脑组织进行总RNA的提取与评价鉴定,并使用琼脂糖变性凝胶电泳和2100芯片生物分析仪对提取的总RNA进行完整性鉴定和质量控制评价。结果两种商品化试剂盒提取的总RNA纯度与得率均可满足实验要求。各组织脏器中总RNA得率依次为脾脏>肝脏>肾脏>大脑>肺脏>心脏。结论与TRIzol总RNA提取试剂盒相比,SV Total RNA Isolation System提取时对操作人员熟练度要求较低,2100芯片生物分析仪有望替代凝胶电泳技术用于总RNA提取时的质量控制。
文摘使用生工柱式植物总RNA抽提纯化试剂盒、Trnzol法以及改良CTAB 3种方法,提取红肉苹果克孜阿尔玛的果肉、果皮、花瓣、叶片中的总RNA,并对比这3种方法提取RNA的产量、质量以及完整性。结果表明,由Trnzol方法提取所获得的RNA纯度较低,有降解现象,且有DNA、蛋白质的污染,果肉和果皮RNA的产量也并不理想;而用改良CTAB法和生工试剂盒法提取的RNA较少降解,所得28 S rRNA和18 S rRNA条带较为清晰,花瓣和叶片的OD260/280均在2以上,生工试剂盒法提取的RNA产量高,OD260/280和OD260/230比值均在1.8~2.5,条带的完整性好。3种方法比较而言,改良CTAB法和Tr Nzol法提取的RNA条带的清晰度、产量及质量都低于生工试剂盒法。
文摘[Objective] The aim of this study was to realize efficient expression of the porcine reproductive and respiratory syndrome virus （PRRSV） ORF7 gene in genetic engineering bacteria and analYze the immunological activity of the recombinant protein after purification. [ Method] The constructed recombinant expression vector pET-ORF7 was transformed into Escherichia co1BL21 （DE3） and induced by IPTG under the optimal condition. After analysis of SDS-PAGE and Western Blot, the expression products were purified by Ni-NTA His · Bind Resin chrom- atographic column under denaturing condition and renatured by gradient dialysis. Subsequently, the immunological activity of the renatured recombinant protein was detected by Westem Blot and indirect ELISA. [ Result] The recombinant plasmid pET-ORF7 expressed in E. coli successfully, and the fusion protein was in the form of inclusion body. By SDS-PAGE detection, the molecular weight of the expression protein was approximate 33 kD, according with the expectation. Analysis by Bandscan software showed that the expressed fusion protein was about 50% of total bacterial protein of BL21 （DE3）. Wastem Blot and indirect ELISA detection showed that the renatured protein could react with PRRSV positive serum specifically, indicating its good immunological activity. [ Conclusion] This study lays a foundation for the preparation of PRRSV monoclonal antibody and diagnostic kit.
