金黄色葡萄球菌菌落DNA提取方法的筛选与优化

    Screening and Optimization of Extraction Methods for DNA from the Colonies of Staphylococcus aureus

    • 摘要: 建立能够快速提取金黄色葡萄球菌菌落DNA用于PCR扩增的通用方法,并比较不同提取方法对菌落DNA的提取效果。通过煮沸法、冻融法、微波法处理金黄色葡萄球菌的菌落,提取DNA,观察PCR扩增效果,比较3种方法获得DNA的最短时间以及处理10 s后所提取DNA的浓度。结果表明:这3种方法均能成功地提取金黄色葡萄球菌的菌落DNA,且对常见的金黄色葡萄球菌都是通用的;这3种方法仅需10 s就可以提取出菌落DNA,没有时间依赖;处理10 s后,煮沸法提取的DNA浓度极其显著高于冻融法和微波法。综上,煮沸法、冻融法、微波法对于常见的金黄色葡萄球菌菌落DNA提取都有较好的结果,通过比较,更建议采用煮沸法进行菌落DNA的提取。

       

      Abstract: In order to establish the general method for fast extracting the colony DNA from Staphylococcus aureus for PCR amplification, and compare the effects of different extraction methods on the extraction of colony DNA, the colonies of Staphylococcus aureus were treated by the boiling method, freeze-thaw method and microwave method, and the DNA was extracted. Then, through observing the effect of PCR amplification, the shortest time for obtaining DNA by the three methods and the concentration of DNA extracted after 10 s of treatment were compared. The results showed that all the three methods could successfully extract the colony DNA from Staphylococcus aureus, and were universal to the common Staphylococcus aureus. These three methods could extract the colony DNA in only 10 s, without time dependence. After 10 s of treatment, the concentration of DNA extracted by the boiling method was significantly higher than that by the freeze-thaw method and microwave method. In summary, the boiling method, freeze-thaw method and microwave method all had better results for the extraction of colony DNA from the common Staphylococcus aureus. By comparison, the boiling method was more recommended for the extraction of colony DNA.

       

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