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肺炎链球菌实验室转化模型的方法学研究 被引量:2

The study on the methodology of laboratory transformation model of streptococcus pneumoniae
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摘要 目的 建立肺炎链球菌的实验室转化模型 ,以便于对该菌的各种目的基因进行重组改造。方法 通过检测细菌的吸光度值 ,在特定的菌密度时利用感受态刺激因子 (CSP)诱导 ,采用血平板培养筛选的方法 ,获取发生转化了的菌株。通过抗生素培养基培养和PCR鉴定是否发生转化。结果 发现不同肺炎链球菌株的转化最适菌密度不同 ,构建了肺炎链球菌感受态缺陷菌株 ,建立了肺炎链球菌在实验室的转化模型。结论 实验室条件下 ,在不同菌密度时可利用CSP诱导肺炎链球菌成为感受态而发生转化目的 建立肺炎链球菌的实验室转化模型 ,以便于对该菌的各种目的基因进行重组改造。方法 通过检测细菌的吸光度值 ,在特定的菌密度时利用感受态刺激因子 (CSP)诱导 ,采用血平板培养筛选的方法 ,获取发生转化了的菌株。通过抗生素培养基培养和PCR鉴定是否发生转化。结果 发现不同肺炎链球菌株的转化最适菌密度不同 ,构建了肺炎链球菌感受态缺陷菌株 ,建立了肺炎链球菌在实验室的转化模型。结论 实验室条件下 ,在不同菌密度时可利用CSP诱导肺炎链球菌成为感受态而发生转化。 Abstrat:Objective To establish a transformation model of Streptococcus pneumoniae in laboratory to reconstructe its chromosome gene.Methods Three strains of S.pneumoniae were induced to form competence by competence stimulated peptide(CSP) at certain density which defined by OD620.Transformants were selected by TSA plates and identified by growing in antibiotics culture and PCR.Results Transformation model of S.pneumoniae in laboratory was established.It is found different strain has different optimal density for being induced into competence.Using this model we constructed three S.pneumoniae competence detected strains.Conclusion In laboratory,we could induce different S.pneumoniae by CSP into competence in their optimal density.
出处 《临床检验杂志》 CAS CSCD 北大核心 2003年第u04期63-65,共3页 Chinese Journal of Clinical Laboratory Science
基金 国家自然科学基金资助 ( 3 0 170 0 5 0 )
关键词 肺炎链球菌 实验室转化模型 方法学研究 自然转化 Streptococcus pneumoniae competence natural transformation
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同被引文献19

  • 1姚成,余泽波,肖永红.肺炎链球菌对大环内酯类抗生素耐药机制研究[J].中国临床药理学杂志,2004,20(4):266-269. 被引量:4
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