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Updated: Jul 10, 2026

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Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice
Published on: November 27, 2019
Is energy deficiency good in moderation?
Christoph Freyer1, Nils-Göran Larsson
1Department of Laboratory Medicine, Karolinska Institutet, 141 86, Stockholm, Sweden.
Cell
|November 6, 2007
Summary
Reduced mitochondrial oxidative phosphorylation protects mice from obesity and diabetes. This suggests that impaired oxidative phosphorylation in insulin-resistant humans may be a compensatory mechanism, not a cause of diabetes.
Area of Science:
- Metabolic research
- Mitochondrial function
- Diabetes and obesity research
Background:
- Mitochondrial oxidative phosphorylation (OXPHOS) is crucial for cellular energy production.
- Insulin resistance is associated with impaired OXPHOS in peripheral tissues.
- The role of OXPHOS deficiency in the pathogenesis of diabetes and obesity remains unclear.
Discussion:
- Pospisilik et al. (2007) investigated the impact of reduced mitochondrial OXPHOS on metabolic health in mice.
- The study demonstrated that genetically reducing OXPHOS confers protection against diet-induced obesity and diabetes.
- This protection was observed despite potential negative consequences of impaired energy production.
Key Insights:
- A moderate reduction in mitochondrial OXPHOS can be protective against metabolic disease.
- Impaired OXPHOS in insulin-resistant humans may represent a compensatory adaptation rather than a primary cause of diabetes.
- Targeting OXPHOS function could offer novel therapeutic strategies for metabolic disorders.
Outlook:
- Further research is needed to elucidate the precise molecular mechanisms underlying OXPHOS-mediated metabolic protection.
- Investigating the therapeutic potential of modulating OXPHOS in human metabolic diseases is warranted.
- Understanding the balance between OXPHOS function and compensatory adaptations is critical for developing effective diabetes and obesity treatments.
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