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Murine models in critical care research
1Division of Pulmonary and Critical Care Medicine, Department of Medicine, College of Medicine, Penn State Milton Hershey Medical Centre, Pennsylvania State University, Hershey, PA, USA. phaouzi@hmc.psu.edu
Critical Care Medicine
|June 14, 2011
Summary
Mouse models are valuable for critical care research, but their unique metabolic and physiological responses to hypoxia differ significantly from humans. These differences must be considered when translating findings to human pathophysiology and treatment strategies.
Area of Science:
- Physiology
- Comparative Medicine
- Critical Care Research
Background:
- Genetically engineered mouse models offer insights into critical conditions but possess unique thermoregulatory and metabolic adaptations.
- Mice exhibit a high metabolic rate and rapid adjustments to temperature and oxygen levels, influencing study outcomes.
- These rodent-specific traits, including nonshivering thermogenesis, differ substantially from human physiology.
Purpose of the Study:
- To highlight the critical need to account for species-specific physiological differences in mouse models.
- To question the direct translatability of mouse responses to hypoxia and other critical conditions (e.g., shock) to human patients.
- To emphasize the importance of understanding mouse metabolic, respiratory, and circulatory responses in critical care research.
Main Methods:
- Review and critical analysis of existing literature on mouse physiology in response to hypoxia.
- Comparative analysis of metabolic, respiratory, and circulatory functions between mice and humans.
- Discussion of the implications of nonshivering thermogenesis and metabolic rate differences.
Main Results:
- Mice have a significantly higher metabolic rate (15-20 times human) due to nonshivering thermogenesis, essential for thermoregulation.
- Hypoxia-induced hypometabolism in mice is a known phenomenon, not unique to specific interventions like hydrogen sulfide.
- Key physiological responses to hypoxia in mice, such as metabolic, respiratory, and circulatory adjustments, lack direct human equivalents.
Conclusions:
- Mouse models for hypoxia, ischemia, or critical care require careful interpretation due to species-specific adaptations.
- Therapeutic strategies developed in mice may not be directly applicable to human critical care patients.
- Understanding the unique physiological responses of mice is crucial for accurate translation of research findings.
