中国畜牧兽医

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超声波提取牛奶中细菌DNA方法的优化

阎晓菲1,林善1,童婷1,王金泉2,黄可欣1,董轩1,岳美婷1,叶东东3,杨斌1   

  1. 1.新疆农业大学科学技术学院,新疆乌鲁木齐  8300522.新疆农业大学动物医学学院,新疆乌鲁木齐  8300523.新疆维吾尔自治区奶业办公室,新疆乌鲁木齐  830063

  • 收稿日期:2013-11-01 出版日期:2014-05-20 发布日期:2014-06-25
  • 通讯作者: 叶东东(1987—),男,河南人,硕士,畜牧师,研究方向:乳品检测。E-mail:jerk567318@sina.com 杨斌(1986—),男,山东人,硕士,研究方向:动物营养与饲料科学。E-mail:king-binyang@163.com
  • 作者简介:阎晓菲(1983—),女,山东人,硕士,讲师,研究方向:动物疾病防治。
  • 基金资助:

    新疆农业大学科学技术学院前期资助课题;新疆农业大学科学技术学院2013年大学生科技创新基金(2013KCX02)。

Improvement of Ultrasonic Power on DNA Extraction Method from Milk Bacterial

YAN Xiao-fei1,LIN Shan1,TONG Ting1,WANG Jin-quan2,HUANG Ke-xin1,DONG Xuan1,YUE Mei-ting1,YE Dong-dong3,YANG Bin1   

  1. 1.College of Science and TechnologyXinjiang Agricultural UniversityUrumqi 830052China2.College of Animal Medicine, Xinjiang Agricultural UniversityUrumqi 830052China3.The Office of Xinjiang Dairy ManagementUrumqi 830063China

  • Received:2013-11-01 Online:2014-05-20 Published:2014-06-25

摘要: 本试验通过采集乌鲁木齐燕儿窝种牛场2003年5月份所有泌乳奶牛的牛奶样品,使用不同超声波功率(0、100、120、140、160 W)处理后,采用十六烷基三甲基溴化铵(CTAB)、十二烷基磺酸钠(SDS)法提取牛奶中细菌DNA,并通过DNA浓度、纯度和细菌通用引物扩增16S rDNA的V6-V8区判定DNA的质量,筛选出提取牛奶中细菌DNA的最佳方法。结果表明,未使用超声波处理样品,直接采用CTAB、SDS法提取出的DNA无法扩增出细菌16S rDNA V6-V8区,而使用不同超声波功率(100、120、140、160 W)处理后能扩增出细菌16S rDNA V6-V8区,其中超声波功率140 W处理样品10 min并结合CTAB法提取牛奶中细菌DNA的浓度最高,为203.35 μg/mL。因此,超声波功率140 W处理样品并结合CTAB法提取牛奶中细菌DNA的方法最优,能满足从分子水平上进一步研究乳房炎相关细菌的要求。

关键词:

乳房炎; 细菌; 超声波; DNA提取; PCR

Abstract: All dairy cows’ milk were collected from Urumqi Yanerwo cow farm in May 2013.Treated those samples with different ultrasonic power (0,100,120,140,160 W) after mixed,then extracted the milk bacterial DNA with the CTAB and SDS methods,respectively,according the DNA concentration, purity and bacterial universal primers of 16S rDNA V6-V8 region to judging the quality of DNA,finally screen out the best DNA extraction method.The results showed that the DNA which was extracted by the CTAB and SDS methods after treated with ultrasonic power 0 W for 10 min couldn’t amplify the V6-V8 of 16S rDNA.Meanwhile,the V6-V8 of 16S rDNA could been amplified with the other ultrasonic power (100,120,140,160 W),and the result showed multifariously.The highest DNA density was 203.35 μg/mL,which was extracted by the CTAB method and treated with ultrasonic power 140 W.Results indicated that using the CTAB method after treated those samples with ultrasonic power 140 W was the best way to get the significantly higher DNA density,this method could further satisfy the requirements of studying about microbial populations of mastitis from the molecular level.

Key words: mastitis; bacterial; ultrasonic wave; DNA extraction; polymerase chain reaction