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Calculating Diet-Induced Thermogenesis in Mice
1Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan. tomo0322@nibiohn.go.jp.
Methods in Molecular Biology (Clifton, N.J.)
|April 19, 2023
Summary
Researchers developed a new method to measure diet-induced thermogenesis (DIT) in mice. This breakthrough allows for precise DIT calculations, aiding in understanding its role in weight management and energy expenditure.
Area of Science:
- Metabolic research
- Animal models in physiology
- Obesity research
Background:
- Diet-induced thermogenesis (DIT) is the energy expenditure increase post-meal, crucial for body mass regulation.
- Existing human DIT measurement methods are not directly applicable to mice, hindering research in this model.
- Accurate DIT assessment in mice is vital for understanding obesity and developing weight management strategies.
Purpose of the Study:
- To develop and validate a novel method for quantifying absolute diet-induced thermogenesis (DIT) in mice.
- To enable detailed analysis of DIT's temporal dynamics and its relationship with caloric intake and energy expenditure in murine models.
- To provide a tool for investigating DIT's potential as a target for weight loss interventions.
Main Methods:
- Measured energy metabolism in mice under fasting conditions.
- Developed a linear regression model plotting energy expenditure (EE) against the square root of activity.
- Measured EE in mice fed ad libitum, applying the regression model to calculate DIT by subtracting predicted EE from observed EE at equivalent activity levels.
Main Results:
- Successfully established a method to calculate absolute DIT values in mice.
- The method allows for tracking the time course of DIT.
- Enables calculation of DIT relative to caloric intake and total EE.
Conclusions:
- The newly developed method provides a reliable way to measure absolute DIT in mice.
- This technique facilitates a deeper understanding of DIT's role in energy balance and body weight regulation.
- The findings support the use of this method for future research into obesity and metabolic disease.
