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Updated: Jun 15, 2026
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Body Composition and Metabolic Caging Analysis in High Fat Fed Mice
Published on: May 24, 2018
"Control" laboratory rodents are metabolically morbid: why it matters
Bronwen Martin1, Sunggoan Ji, Stuart Maudsley
1Metabolism Unit, Laboratory of Clinical Investigation, Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, USA.
Summary
Many research rodents are sedentary and obese, impacting study results. This highlights the need for better animal models to accurately reflect human health and disease research outcomes.
Area of Science:
- Biomedical Research
- Animal Models
- Physiology
Background:
- Standard laboratory rodents (rats and mice) often exhibit sedentary lifestyles, obesity, and glucose intolerance.
- These health issues can negatively impact cellular physiology, oxidative stress, inflammation, and disease susceptibility.
- The condition of these animals may not accurately represent human physiological states.
Purpose of the Study:
- To highlight the potential for confounding data interpretation in biomedical research.
- To emphasize the impact of diet and exercise on rodent physiology and disease models.
- To caution against the direct translation of findings from sedentary, obese rodents to active, normal-weight human populations.
Main Methods:
- Review of existing literature on rodent models in biomedical research.
- Analysis of physiological parameters in standard laboratory rodents.
- Comparison of rodent models with human physiological conditions.
Main Results:
- Sedentary, obese rodents display altered cellular physiology, increased oxidative stress, and inflammation.
- These factors can lead to premature death and confound research outcomes.
- Treatments effective in these models may fail or cause adverse effects in human studies.
Conclusions:
- The characteristics of standard control rodents necessitate careful consideration in research design.
- Obesity and sedentary behavior in animal models can lead to misleading results in human studies.
- Developing more representative animal models is crucial for advancing human health research.
