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Mild mitochondrial uncoupling in mice affects energy metabolism, redox balance and longevity

Camille C Caldeira da Silva1, Fernanda M Cerqueira, Lívea F Barbosa

  • 1Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil.

Aging Cell
|May 29, 2008
PubMed

Insights

Mitochondrial uncouplers, like 2,4-dinitrophenol, mimic caloric restriction benefits. Low doses in mice improved health markers and extended lifespan, showing potential as a longevity intervention.

Area of Science:

  • Gerontology and Longevity Research
  • Mitochondrial Biology and Metabolism

Background:

  • Caloric restriction (CR) is the most effective non-genetic intervention for extending lifespan.
  • Developing therapeutic strategies to mimic CR's benefits is a significant research focus.
  • Mitochondrial uncouplers are proposed as potential CR mimetics due to reduced energy conversion efficiency.

Purpose of the Study:

  • To investigate if mitochondrial uncouplers can serve as caloric restriction mimetics.
  • To evaluate the effects of low-dose 2,4-dinitrophenol (DNP) on metabolic health and longevity in mammals.

Main Methods:

  • Mice were treated with low doses of the protonophore 2,4-dinitrophenol.
  • Assessed tissue respiratory rates, serological glucose, triglyceride, and insulin levels.
  • Measured reactive oxygen species (ROS) levels, DNA/protein oxidation, and body weight.

Main Results:

  • DNP treatment enhanced tissue respiratory rates and improved metabolic markers (glucose, triglycerides, insulin).
  • Reduced levels of reactive oxygen species and oxidative damage to DNA and proteins were observed.
  • DNP-treated mice exhibited reduced body weight and significantly enhanced longevity.

Conclusions:

  • Mild mitochondrial uncoupling via DNP is an effective in vivo antioxidant strategy.
  • This study describes the first therapeutic intervention to effectively reproduce CR's physiological, metabolic, and lifespan effects in healthy mammals.

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