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Aging (Albany NY). 2019 Nov 23;11(22):10454-10467. doi: 10.18632/aging.102469. Epub 2019 Nov 23.

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

Author information

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.

Abstract

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.

KEYWORDS:

diabetes mellitus; gut microbiota; pseudo-germ-free mice

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