Metformin treatment significantly enhances intestinal glucose uptake in patients with type 2 diabetes: Results from a randomized clinical trial

JP Koffert, K Mikkola, KA Virtanen, Andersson AMD, L Faxius, K Hallsten, M Heglind, L Guiducci, T Pham, Silvola JMU, J Virta, Olof Eriksson, SP Kauhanen, A Saraste, S Enerback, P Iozzo, R Parkkola, MF Gomez, P Nuutila

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Sammanfattning

Aims: Metformin therapy is associated with diffuse intestinal F-18-fluoro-deoxyglucose (FDG) accumulation in clinical diagnostics using routine FDG-PET imaging. We aimed to study whether metformin induced glucose uptake in intestine is associated with the improved glycaemic control in patients with type 2 diabetes. Therefore, we compared the effects of metformin and rosiglitazone on intestinal glucose metabolism in patients with type 2 diabetes in a randomized placebo controlled clinical trial, and further, to understand the underlying mechanism, evaluated the effect of metformin in rats.Methods: Forty-one patients with newly diagnosed type 2 diabetes were randomized to metformin (1 g, b.i.d), rosiglitazone (4 mg, b.i.d), or placebo in a 26-week double-blind trial. Tissue specific intestinal glucose uptake was measured before and after the treatment period using FDG-PET during euglycemic hyperinsulinemia. In addition, rats were treated with metformin or vehicle for 12 weeks, and intestinal FDG uptake was measured in vivo and with autoradiography.Results: Glucose uptake increased 2-fold in the small intestine and 3-fold in the colon for the metformin group and associated with improved glycemic control. Rosiglitazone increased only slightly intestinal glucose uptake. In rodents, metformin treatment enhanced intestinal FDG retention (P = 0.002), which was localized in the mucosal enterocytes of the small intestine.Conclusions: Metformin treatment significantly enhances intestinal glucose uptake from the circulation of patients with type 2 diabetes. This intestine-specific effect is associated with improved glycemic control and localized to mucosal layer. These human findings demonstrate directs effect of metformin on intestinal metabolism and elucidate the actions of metformin. (C) 2017 The Authors. Published by Elsevier Ireland Ltd.
OriginalspråkOdefinierat/okänt
Sidor (från-till)208–216
Antal sidor9
TidskriftDiabetes Research and Clinical Practice
Volym131
DOI
StatusPublicerad - 2017
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • Intestine
  • metformin
  • glucose uptake

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