›› 2016, Vol. 43 ›› Issue (5): 1355-1360.doi: 10.16431/j.cnki.1671-7236.2016.05.035

• 疾病防治 • 上一篇    下一篇

抑制大肠杆菌K88的益生菌体外筛选

王磊1,2, 吕阳1,2, 张越1,2, 谢佳倩1,2, 赵迪1,2, 晏利琼1,2, 梅慧敏1,2, 王蕾1,2, 易丹1,2, 陈洪波1,2, 丁斌鹰1,2, 侯永清1,2, 吴涛1,2   

  1. 1. 武汉轻工大学动物科学与营养工程学院, 武汉 430023;
    2. 动物营养与饲料科学湖北省重点实验室, 武汉 430023
  • 收稿日期:2015-11-24 出版日期:2016-05-20 发布日期:2016-05-23
  • 通讯作者: 吴涛 E-mail:wtao05@163.com
  • 作者简介:王磊(1990-),男,湖北荆州人,硕士生,研究方向:动物营养与饲料科学,E-mail:459083302@qq.com
  • 基金资助:
    国家自然科学基金青年科学基金项目(31302089);湖北省自然科学基金项目(2012FFBO4804)

Screening of Probiotics Inhibiting E. coli K88 in vitro

WANG Lei1,2, LV Yang1,2, ZHANG Yue1,2, XIE Jia-qian1,2, ZHAO Di1,2, YAN Li-qiong1,2, MEI Hui-min1,2, WANG Lei1,2, YI Dan1,2, CHEN Hong-bo1,2, DING Bin-ying1,2, HOU Yong-qing1,2, WU Tao1,2   

  1. 1. School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
    2. Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan 430023, China
  • Received:2015-11-24 Online:2016-05-20 Published:2016-05-23

摘要: 本研究以从断奶仔猪肠道分离的益生菌为试验菌株,将大肠杆菌K88和益生菌接种到体外培养的猪小肠上皮细胞(intestinal porcine epithelial cell-1,IPEC-1)中,测定培养2.5h上清液中的乳酸脱氢酶(lactate dehydrogenase,LDH)活性,同时将益生菌和大肠杆菌K88体外混合培养2.5h,进行平板计数,统计大肠杆菌K88菌数的变化,筛选出可以抑制大肠杆菌K88的益生菌。试验结果显示,干酪乳杆菌和凝结芽孢杆菌能显著降低IPEC-1培养上清液中的LDH活性(P<0.05),降低大肠杆菌K88对细胞的损伤;凝结芽孢杆菌能降低DMEM培养基中大肠杆菌K88的生长速度,结合模拟制粒过程及胃肠道环境的耐高温、耐酸及耐胆盐研究进行综合分析,该凝结芽胞杆菌对大肠杆菌K88有较好的抑制作用且具有良好的耐高温、耐酸及耐胆盐性能,具有作为微生态制剂菌株的应用潜力。本试验建立了能够抑制大肠杆菌K88的益生菌体外筛选技术模型。

关键词: 益生菌; 干酪乳杆菌; 凝结芽孢杆菌; IPEC-1细胞系; LDH活性; 平板计数法

Abstract: The probiotics tested in the experiment were isolated from the intestinal of weaning piglets.The isolated probiotics and E.coli K88 were inoculated into the culture of intestinal porcine epithelial cell-1 (IPEC-1).The activity of lactate dehydrogenase (LDH) in the supernatant was measured after incubating for 2.5 h.At the same time, the probiotics and E.coli K88 were co-cultured in vitro, the number of E.coli K88 was counted and the probiotics which could be resistant to the E.coli K88 were selected 2.5 h later.The results showed that the Lactobacillus casei and Bacillus coagulans could significantly reduce LDH activity (P<0.05), decrease the damage of E.coli K88; Bacillus coagulans could inhibit the growth of E.coli K88.At the same time, Bacillus coagulans could resist high temperature, acid and bile salt.The results showed that Bacillus coagulans strains had great potential as the application of probiotics strains.The methods could be used as a model of screen probiotics which could inhibit the growth of E.coli K88 in vitro.

Key words: probiotics; Lactobacillus casei; Bacillus coagulans; IPEC-1 cell line; LDH activity; plate count method

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