EXPERIMENTAL METHOD AND ANIMAL

Effects of Aflatoxin M1 and Ochratoxin A on Structure of Intestinal Microflora of Mice

  • YANG Liting ,
  • GAO Ya'nan ,
  • YANG Xue ,
  • LIU Huawei ,
  • WANG Jiaqi ,
  • ZHENG Nan
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  • 1. College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China

Received date: 2021-05-16

  Online published: 2021-12-16

Abstract

This study was aimed to investigate the effects of aflatoxin M1 (AFM1) and ochratoxin A (OTA) on the structure of intestinal microflora of mice. A total of 48 healthy 4-week-old ICR mice were selected and randomly divided into 4 groups with 12 mice in each group. The control group was gavaged with 1% dimethyl sulfoxide (DMSO) solution, the AFM1 group was gavaged with 3.5 mg/kg BW AFM1, OTA group was gavaged with 3.5 mg/kg BW OTA, and the AFM1+OTA group was gavaged with 3.5 mg/kg BW AFM1+3.5 mg/kg BW once a day for 35 days. After intragastric administration, microbial diversity in the colon of mice was analyzed by 16S rRNA sequencing. The results showed that after AFM1 and OTA treatment, compared with control group, both single and mixed treatments resulted in decreased relative abundance of Firmicutes, Lactobacillaceae, Lactobacillus and Alloprevotella (P<0.05), and increased relative abundance of Bacteroidetes and Proteobacteria, Ruminococcaceae and Enterobacteriaceae, Clostridium_Sensu_Stricto_1 (P<0.05). These results indicate that both AFM1 and OTA treatments change the structure of intestinal microflora and impair the function of intestinal microbial barrier in mice.

Cite this article

YANG Liting , GAO Ya'nan , YANG Xue , LIU Huawei , WANG Jiaqi , ZHENG Nan . Effects of Aflatoxin M1 and Ochratoxin A on Structure of Intestinal Microflora of Mice[J]. Chinese Journal of Animal Nutrition, 2021 , 33(12) : 7050 -7061 . DOI: 10.3969/j.issn.1006-267x.2021.12.045

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