Research Paper Volume 11, Issue 22 pp 10454—10467

Abnormal gut microbiota composition contributes to the development of type 2 diabetes mellitus in db/db mice

Fan Yu 1, , Wei Han 2, , Gaofeng Zhan 3, , Shan Li 3, , Xiaohong Jiang 1, , Long Wang 1, , Shoukui Xiang 1, , Bin Zhu 4, , Ling Yang 5, , Ailin Luo 3, , Fei Hua 1, , Chun Yang 3, 6, ,

  • 1 Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou, China
  • 2 Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
  • 3 Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
  • 4 Department of Critical Care Medicine, The Third Affiliated Hospital of Soochow University, Changzhou, China
  • 5 Department of Cardiology, The Third Affiliated Hospital of Soochow University, Changzhou, China
  • 6 Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

received: July 25, 2019 ; accepted: November 8, 2019 ; published: November 23, 2019 ;
How to Cite

Copyright © 2019 Yu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


It is well recognized that type 2 diabetes mellitus (T2DM) is an age-related metabolic disease, emerging gradually as a major global health burden that has gained public attention. Meanwhile, increasing attention is paid to the crucial role of gut microbiota in the pathogenesis and therapeutic mechanisms of metabolic disorders, especially T2DM. In this study, we used C57 BL/KS db/db male mice as a T2DM murine model. We found that the β-diversity and relative abundances of gut bacteria were obviously altered in db/db mice, associated with a significant increase in Verrucomicrobia at six levels (phylum, class, order, etc.) and family S24-7 and a significant decrease in Bacteroidaceae at family, genus, and species levels, as well as Prevotellaceae at family and genus levels. Furthermore, fecal bacteria from db/db and m/m mice transplanted into pseudo-germ-free mice showed a significant change in the metabolic parameters, including the body weight, fasting blood glucose, fluid and food intake, and alterations in the composition of the gut microbiota. Taken together, these findings suggest that abnormalities in the composition of the gut microbiota might contribute to the development of T2DM and that potential therapeutic strategies improving gut microbiota might provide beneficial effects for individuals with T2DM and age-related glucose intolerance.


CONT: control; LPS: lipopolysaccharide; NS: not significant; PCA: principal component analysis; PLS-DA: partial least squares-discriminant analysis; SEM: standard error of the mean; T2DM: type 2 diabetes mellitus.