Impact of Metformin and Dysosmobacter Welbionis on Diet-induced Obesity and Diabetes: from Clinical Observation to Preclinical Intervention

Overview

Journal Diabetologia

Specialty Endocrinology

Date 2023 Oct 28

PMID 37897566

Authors

Emilie Moens de Hase

Audrey M Neyrinck

Julie Rodriguez

Miriam Cnop

Nicolas Paquot

Jean-Paul Thissen

Yining Xu

Ana Beloqui

Laure B Bindels

Nathalie M Delzenne

Matthias Van Hul

Patrice D Cani

Affiliations

Soon will be listed here.

Abstract

Aims/hypothesis: We aimed to investigate the association between the abundance of Dysosmobacter welbionis, a commensal gut bacterium, and metabolic health in human participants with obesity and diabetes, and the influence of metformin treatment and prebiotic intervention.

Methods: Metabolic variables were assessed and faecal samples were collected from 106 participants in a randomised controlled intervention with a prebiotic stratified by metformin treatment (Food4Gut trial). The abundance of D. welbionis was measured by quantitative PCR and correlated with metabolic markers. The in vitro effect of metformin on D. welbionis growth was evaluated and an in vivo study was performed in mice to investigate the effects of metformin and D. welbionis J115 supplementation, either alone or in combination, on metabolic variables.

Results: D. welbionis abundance was unaffected by prebiotic treatment but was significantly higher in metformin-treated participants. Responders to prebiotic treatment had higher baseline D. welbionis levels than non-responders. D. welbionis was negatively correlated with aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels and fasting blood glucose levels in humans with obesity and type 2 diabetes. In vitro, metformin had no direct effect on D. welbionis growth. In mice, D. welbionis J115 treatment reduced body weight gain and liver weight, and improved glucose tolerance to a better level than metformin, but did not have synergistic effects with metformin.

Conclusions/interpretation: D. welbionis abundance is influenced by metformin treatment and associated with prebiotic response, liver health and glucose metabolism in humans with obesity and diabetes. This study suggests that D. welbionis may play a role in metabolic health and warrants further investigation.

Clinical Trial: NCT03852069.

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