《中国畜牧兽医》 ›› 2019, Vol. 46 ›› Issue (2): 433-441.doi: 10.16431/j.cnki.1671-7236.2019.02.013

• 动物营养与饲料科学 • 上一篇    下一篇

黄曲霉毒素B1与M1对小鼠肠道细菌多样性的影响

张牧臣, 郑楠, 赵圣国, 张养东, 李松励, 王加启   

  1. 中国农业科学院北京畜牧兽医研究所, 农业部奶及奶制品质量安全控制重点实验室, 农业部奶产品质量安全风险评估实验室(北京), 农业部奶及奶制品质量监督检验测试中心(北京), 动物营养学国家重点实验室, 北京 100193
  • 收稿日期:2018-06-22 出版日期:2019-02-20 发布日期:2019-02-20
  • 通讯作者: 王加启 E-mail:jiaqiwang@vip.163.com
  • 作者简介:张牧臣(1991-),男,硕士,研究方向:动物营养与饲料科学,E-mail:muchen805215099@163.com
  • 基金资助:

    国家现代农业产业技术体系建设专项(nycytx-04-01);中国农业科学院科技创新工程项目(ASTIPIAS12);国家自然科学基金项目(31501399);公益性行业(农业)科研专项(201403071);动物营养学国家重点实验室自主课题(2004DA125184G1611)

Effects of Aflatoxin B1 and M1 on Intestinal Bacterial Diversity in Mice

ZHANG Muchen, ZHENG Nan, ZHAO Shengguo, ZHANG Yangdong, LI Songli, WANG Jiaqi   

  1. Ministry of Agriculture-Key Laboratory of Quality & Safety Control for Milk and Dairy Products, Ministry of Agriculture-Laboratory of Quality and Safety Risk Assessment for Dairy Products, Ministry of Agriculture-Milk and Dairy Product Inspection Center, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2018-06-22 Online:2019-02-20 Published:2019-02-20

摘要:

试验旨在研究黄曲霉毒素B1与M1(AFB1与AFM1)对小鼠肠道细菌多样性的影响。选取体况良好的4周龄ICR(CD-1)雄性小鼠40只,随机分成4组,每组10个重复,每个重复1只小鼠,其中AFB1组小鼠每只每天灌胃0.3 mg/kg体重AFB1,AFM1组小鼠每只每天灌胃3.0 mg/kg体重AFM1,AFB1+AFM1组每只每天灌胃AFB1与AFM1的混合溶液,其中AFB1终浓度0.3 mg/kg体重,AFM1终浓度3.0 mg/kg体重,以上3组毒素溶剂均为1.0%二甲基亚砜水溶液。对照组小鼠每只每天灌胃1.0%二甲基亚砜水溶液。每只灌胃剂量均为200 μL,每天09:00灌胃一次,连续灌胃28 d。灌胃结束后,处死并解剖小鼠,收集结肠内容物,采用16S rRNA测序的方法对肠内容物细菌多样性进行测序分析。结果显示:在细菌群落的门水平、科水平及属水平,与对照组相比,3个毒素处理组小鼠肠道内容物细菌优势菌群均未发生明显排序变化(P>0.05),但不同的毒素处理仍造成了不同分类水平下细菌菌群丰度的显著变化:与对照组相比,AFB1组及联合灌胃组小鼠肠内致病菌或条件致病菌,如Facklamia、Staphylococcus、Corynebacterium属细菌丰度显著升高(P<0.05);而AFM1组与对照组相比未见显著差异(P>0.05)。综合试验结果,AFB1单独作用或与AFM1联合作用可诱导小鼠肠道内致病菌或条件致病菌细菌增殖,改变肠道健康微生物区系,损伤肠道微生物屏障功能。

关键词: 黄曲霉毒素B1(AFB1); 黄曲霉毒素M1(AFM1); 细菌多样性

Abstract:

To study the effect of aflatoxin B1 and M1 on intestinal bacterial diversity in mice,40 ICR male mice (4 weeks) were randomized into four groups of 10 each and received an oral administration of 0.3 mg/(kg·BW) AFB1,3.0 mg/(kg·BW) AFM1,mixture of AFB1 and AFM1 (0.3 mg/(kg·BW) AFB1,3.0 mg/(kg·BW) AFM1) and vehicle (1.0% DMSO) for 28 days (once a day at 9:00 am).Mice were executed after gavage,and intestinal contents were collected.The bacterial diversity of intestinal contents was analyzed by 16S rRNA sequencing.The results showed that compared with control group,there was no significant change in the dominant bacteria microflora in three experimental groups,regardless of the phylum level,family level or genus level(P>0.05).However,different toxin treatments still resulted in significant changes in the abundance of different bacteria microflora:Pathogenic bacteria or opportunistic pathogens abundance in the AFB1 treatment and its combined treatment group with AFM1,such as Facklamia,Staphylococcus and Corynebacterium were significantly increased compared with the control group (P<0.05),but not for AFM1 group.Comprehensive analysis showed that individual AFB1 or combined with AFM1 could increase the abundance of pathogenic bacteria or opportunistic pathogens,and could change the healthy intestinal bacterial diversity,damage the function of intestinal microbial barrier.

Key words: aflatoxin B1(AFB1); aflatoxin M1(AFM1); bacterial diversity

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