Cited by 432Metabolism, Diabetes, and CancerMitochondrial Function and PathologyAutophagy in Disease and Therapy

Metformin Improves Mitochondrial Respiratory Activity through Activation of AMPK

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Wang, Yu, An, Hongying, Liu, Ting, Qin, Caolitao, Sesaki, Hiromi, Guo, Shaodong, Radovick, Sally, Hussain, Mehboob +4 more·2019·Cell Reports

Abstract

Impaired mitochondrial respiratory activity contributes to the development of insulin resistance in type 2 diabetes. Metformin, a first-line antidiabetic drug, functions mainly by improving patients' hyperglycemia and insulin resistance. However, its mechanism of action is still not well understood. We show here that pharmacological metformin concentration increases mitochondrial respiration, membrane potential, and ATP levels in hepatocytes and a clinically relevant metformin dose increases liver mitochondrial density and complex 1 activity along with improved hyperglycemia in high-fat- diet (HFD)-fed mice. Metformin, functioning through 5' AMP-activated protein kinase (AMPK), promotes mitochondrial fission to improve mitochondrial respiration and restore the mitochondrial life cycle. Furthermore, HFD-fed-mice with liver-specific knockout of AMPKα1/2 subunits exhibit higher blood glucose levels when treated with metformin. Our results demonstrate that activation of AMPK by metformin improves mitochondrial respiration and hyperglycemia in obesity. We also found that supra-pharmacological metformin concentrations reduce adenine nucleotides, resulting in the halt of mitochondrial respiration. These findings suggest a mechanism for metformin's anti-tumor effects.

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Authors
Wang, Y., An, H., Liu, T., Qin, C., Sesaki, H., Guo, S., Radovick, S., Hussain, M., Maheshwari, A., Wondisford, F. E., O’Rourke, B., & He, L.
Affiliations
  • Johns Hopkins University (US)
  • Texas A&M University (US)
  • Rutgers, The State University of New Jersey (US)
  • University of Michigan (US)
Corresponding author
He, Ling
Venue
Cell Reports
Publisher
Elsevier BV
Published
2019-11
Volume
29
Issue
6
Pages
1511-1523.e5
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2985421076
Cited by
432
References
55
Citations by year
2026: 53 · 2025: 70 · 2024: 63 · 2023: 62 · 2022: 82 · 2021: 62 · 2020: 38 · 2014: 1
FWCI
15.05
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health
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 › Epidemiology › Autophagy in Disease and Therapy
Keywords
metformin, AMPK, mitochondrial respiration, mitochondrial fission, mitochondrial dynamics, insulin resistance, type 2 diabetes, hyperglycemia, high-fat diet, hepatocytes, liver mitochondria, complex I, mitochondrial membrane potential, ATP production, obesity, anti-tumor effect, adenine nucleotides
MeSH terms
AMP-Activated Protein Kinase Kinases, Adenine Nucleotides, Animals, Blood Glucose, Hyperglycemia, Hypoglycemic Agents, Insulin Resistance, Liver, Metformin, Mice, Inbred C57BL, Mitochondria, Liver, Protein Kinases, Cell Respiration, Hepatocytes, Electron Transport Complex I, Mice, AMP-Activated Protein Kinases, Gene Knockout Techniques, Diet, High-Fat, Mitochondrial Dynamics

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