Abstract
Background
Diabetes is associated with a high risk of developing cognitive impairment, but the underlying mechanism remains unclear. Recent studies have found that gut microbiota may be involved in the progression of diabetes-associated cognitive impairment.
Aims
To analyze the diversity of gut microbiota in type 2 diabetes with or without cognitive impairment
Methods
16S rRNA sequencing was used to detect the gut microbiota composition in 154 type 2 diabetes (T2DM) subjects
Results
Among 154 elderly T2DM participants included in our study, 73 with normal and 81 with impaired cognition. Lower levels of hemoglobin and HDL were observed in subjects with cognitive impairment. Patients with cognitive impairment had a lower abundance of Tenericutes. Comparison at the genus level revealed that T2DM patients with cognitive impairment had a decreased abundance of Bifidobacterium and unranked-RF39 and an increased abundance of Peptococcus and unranked-Leuconostocaceae. Additionally, the relative abundance of Veillonella and Pediococcus were decreased in subjects with cognitive impairment. Furthermore, the relative abundance of 7 sub-functions was significantly changed in the group with cognitive impairment. Calcium signaling pathways and the Renin-angiotensin system were upregulated in the cognitive impairment group while GnRH signaling, Fc gamma R-mediated phagocytosis, endocytosis, isoflavonoid biosynthesis, and cytochrome P450 were deregulated.
Conclusion
Bifidobacterium may be associated with cognition in T2DM. Calcium signaling and renin-angiotensin system were shown to be associated with diabetes-associated cognitive impairment through gut microbiota.
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Acknowledgements
Funded by the Wuxi Commission of Public Health and Family Planning of China (T201629), Wuxi people’s hospital (RKA201725, RKB 201714, RKA201811).
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Conceptualization: [KH and GL]; methodology: [YY, ZW, WL, JZ and MP]; formal analysis and investigation: [YZ, SL, BW, BZ, JY, SG and XC]; writing—original draft preparation: [YZ]; writing—review and editing: [GL]; funding acquisition: [KH]; resources: [ZY]; supervision: [KH and ZY].
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The present study was approved by the Ethics Committee of the Nanjing Medical University affiliated Wuxi People’s Hospital, China.
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Zhang, Y., Lu, S., Yang, Y. et al. The diversity of gut microbiota in type 2 diabetes with or without cognitive impairment. Aging Clin Exp Res 33, 589–601 (2021). https://doi.org/10.1007/s40520-020-01553-9
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DOI: https://doi.org/10.1007/s40520-020-01553-9