3 Biotech

, 8:176 | Cite as

Bacterial lactase genes diversity in intestinal mucosa of mice with dysbacterial diarrhea induced by antibiotics

  • Chengxing Long
  • Yawei Liu
  • Lu He
  • Qinquan Tan
  • Zizhen Yu
  • Nenqun Xiao
  • Zhoujin Tan
Original Article


The current study aimed at exploring the diversity of bacterial lactase genes in the intestinal mucosa of mice with dysbacterial diarrhea induced by antibiotics and to provide experimental basis for antibiotics-induced diarrhea. Mice model of dysbacterial diarrhea was established by gastric perfusion with mixture of cephradine capsules and gentamicin sulfate (23.33 mL kg−1 d−1), twice a day and continuously for 5 days. Intestinal mucosa from jejunum to ileum was collected, and bacterial metagenomic DNA was extracted for Miseq metagenome sequencing to carry out diversity analysis. The results showed that specific operational taxonomic units (OTUs) were 45 in the control group and 159 in the model group. The Chao1, ACE, Shannon and Simpson indices in model group were significantly higher (P < 0.01 or P < 0.05) than control group. Principal component analysis (PCA) and box chart of the control group were relatively intensive, while in the model group, they were widely dispersed. Furthermore, the inter-group box area was higher than that in the intra-group. Compared with the model group, the abundance of bacterial lactase genes in Proteobacteria from the intestinal mucosa of the control group was higher, but lower in Actinobacteria and unclassified bacteria. At the genus level, the relative abundance of bacterial species and taxon units in model group was obviously increased (P < 0.05). Our results indicate that antibiotics increased the diversity and abundance of bacterial lactase genes in the intestinal mucosa, as the abundance of Betaproteobacteria, Cupriavidus, Ewingella, Methyloversatilis, Rhodocyclaceae and Rhodocyclales. In addition, antibiotics become an additional source for lactase genes of Ewingella, Methyloversatilis, Mycobacterium, Microbacterium, Beutenberqia and Actinomyces.


Dysbacterial diarrhea Lactase gene Intestinal mucosa Gene diversity High-throughput sequencing Antibiotics 



Thanks are extended to the National Natural Science Foundation of China for research funding (no. 81573951).

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest related to this article.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Hunan University of Chinese MedicineChangshaChina
  2. 2.College of Mathematics and FinanceHunan University of Humanities, Science and TechnologyLoudiChina
  3. 3.School of Animal Science and TechnologyHuazhong Agricultural UniversityWuhanChina
  4. 4.Rongjun Hospital of Hunan ProvinceChangshaChina

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