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Electronic Journal of Emerging Infectious Diseases ›› 2023, Vol. 8 ›› Issue (2): 1-7.doi: 10.19871/j.cnki.xfcrbzz.2023.02.001

• Original Articles •     Next Articles

Study on the characteristics of gut microbiota in diabetes with metabolic associated fatty liver disease

Liu Xing1, Wang Xiaomei2, Gu Ye1, Guan Xin2, Zhang Zhen1, Li Xinyue1, Li Meiyuxi1, Li Lizhu1, Wang Yan1   

  1. 1. Shenyang Clinical Medical Research Center for Hepatobiliary Diseases, The Sixth People's Hospital of Shenyang, Liaoning Shenyang, 110006, China;
    2. Endocrine Department, The Sixth People's Hospital of Shenyang, Liaoning Shenyang, 110006, China
  • Received:2021-09-15 Online:2023-04-30 Published:2023-05-19

Abstract: Objective To explore the correlation between the occurrence and development of metabolic associated fatty liver disease (MAFLD) in diabetes and fat metabolism related genes and gut microbiota, and to provides a new idea for the prevention and treatment of diabetes combined with MAFLD. Method 21 Mice were randomly divided into diabetes group(6 cases) and diabetes with MAFLD group(15 cases). The mice in the diabetes group and the mice in the diabetes combined with MAFLD group were fed with high sugar and high fat diet for 35 days and 63 days respectively, then the levels of blood glucose, blood lipids, liver function, insulin, liver lipoprotein lipase (LPl), fatty acid synthase (Fasn) and intestinal flora in the two groups were detected, and the changes of liver HE staining and intestinal tight junction protein in diabetes with MAFLD group were observed. Fifteen diabetes patients hospitalized in the Sixth People's Hospital of Shenyang from November 2021 to June 2022 were divided into diabetes group (7 cases) and diabetes with MAFLD group (8 cases). Whole genome shotgun sequencing was used to detect the gut microbiota in feces samples of patients. Result Compared with the diabetes group, the levels of blood lipid, liver function and insulin in diabetes with MAFLD group were lower, while the levels of blood glucose, liver LPl and Fasn were higher. The HDL-C, LPl and Fasn had significant difference between the two groups (P<0.05). The changes in liver HE staining and intestinal tight junction protein were observed between 4 weeks before and 2 weeks after successful modeling in both groups of mice, with the progress of MAFLD, liver cells first appeared lipid accumulation, then developed into ballooning degeneration, and the expression levels of intestinal tight junction protein presented a gradual downward trend. Compared with the diabetes group, the Ruminococcus abundance in diabetes with MAFLD group was higher in both mice and patients, the difference was statistically significant (P<0.05). Compared with non obesity patients, the abundance of Ruminococcus, Blautia and Collinsella in obesity patients were increased, while the abundance of Bifidobacteria was decreased, the differences between the two groups were statistically significant(P<0.05). Conclusion In the development of diabetes combined with MAFLD, lipid deposition in the liver occurs before the changes of intestinal tight junction protein. Ruminococcus and high expression of LPl and Fasn in the liver may play an important role in the occurrence of MAFLD. Ruminococcus, Blautia and Collinsella may related to obesity, while Bifidobacterium has a protective effect on obesity.

Key words: Diabetes, Metabolic associated fatty liver disease, Gut microbiota, Obesity

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