Cited by 2,157Metabolism, Diabetes, and CancerMitochondrial Function and PathologyDiabetes Treatment and Management

The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

Evidence that metformin exerts its anti-diabetic effects through inhibition of complex 1 of the mitochondrial respiratory chain

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OWEN, Mark R., DORAN, Elena, HALESTRAP, Andrew P.·2000·Biochemical Journal

Abstract

Although metformin is widely used for the treatment of non-insulin-dependent diabetes, its mode of action remains unclear. Here we provide evidence that its primary site of action is through a direct inhibition of complex 1 of the respiratory chain. Metformin (50 μM) inhibited mitochondrial oxidation of glutamate+malate in hepatoma cells by 13 and 30% after 24 and 60 h exposure respectively, but succinate oxidation was unaffected. Metformin also caused time-dependent inhibition of complex 1 in isolated mitochondria, whereas in sub-mitochondrial particles inhibition was immediate but required very high metformin concentrations (K0.5, 79 mM). These data are compatible with the slow membrane-potential-driven accumulation of the positively charged drug within the mitochondrial matrix leading to inhibition of complex 1. Metformin inhibition of gluconeogenesis from L-lactate in isolated rat hepatocytes was also time- and concentration-dependent, and accompanied by changes in metabolite levels similar to those induced by other inhibitors of gluconeogenesis acting on complex 1. Freeze-clamped livers from metformin-treated rats exhibited similar changes in metabolite concentrations. We conclude that the drug's pharmacological effects are mediated, at least in part, through a time-dependent, self-limiting inhibition of the respiratory chain that restrains hepatic gluconeogenesis while increasing glucose utilization in peripheral tissues. Lactic acidosis, an occasional side effect, can also be explained in this way.

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Crossref · 10.1042/bj3480607

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Metadata

Authors
OWEN, M. R., DORAN, E., & HALESTRAP, A. P.
Affiliations
University of Bristol (GB)
Venue
Biochemical Journal
Published
2000-06-07
Volume
348
Issue
3
Pages
607-614
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W1995069275
Cited by
2,157
References
35
Citations by year
2026: 64 · 2025: 78 · 2024: 92 · 2023: 125 · 2022: 127 · 2021: 157 · 2020: 163 · 2019: 144 · 2018: 142 · 2017: 144 · 2016: 139 · 2015: 126 · 2014: 135 · 2013: 112 · 2012: 75
FWCI
4.10
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UWE Research Repository (UWE Bristol) (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
metformin, mitochondrial complex I inhibition, mitochondrial respiratory chain, type 2 diabetes, gluconeogenesis, hepatocytes, mitochondrial membrane potential, lactic acidosis, glucose utilization, mechanism of action
MeSH terms
Animals, Electron Transport, Gluconeogenesis, Hypoglycemic Agents, Liver, Male, Metformin, Mitochondria, NADH, NADPH Oxidoreductases, Submitochondrial Particles, Tumor Cells, Cultured, Signal Transduction, Rats, Wistar, Electron Transport Complex I, Rats

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