Body mass, fat mass, and oxygen consumption in standard diet–and fat-fed mice
5 weeks | 20 weeks | |||
---|---|---|---|---|
Standard diet | Fat | Standard diet | Fat | |
Body mass (g) | 28.7 ± 0.5 | 28.8 ± 0.5 | 31.7 ± 0.7 | 35.9 ± 0.8* |
Fat mass (%) | 14.5 ± 1.3 | 24.8 ± 1.9* | 13.9 ± 0.6 | 27.8 ± 2.9* |
Epididymal fat mass (g) | 0.28 ± 0.02 | 0.63 ± 0.05* | 0.46 ± 0.09 | 1.71 ± 0.21* |
Brown fat mass (mg) | 68 ± 3 | 76 ± 4 | 79 ± 8 | 130 ± 2* |
Vo2 (ml/g/h) | 3.57 ± 0.05 | 3.72 ± 0.06 | 3.42 ± 0.03 | 3.43 ± 0.10 |
RER (Vco2/Vo2) | 0.96 ± 0.01 | 0.86 ± 0.01* | 0.95 ± 0.01 | 0.81 ± 0.01* |
Data are means ± SE of 6–11 animals per group. Fat mass (%) was determined by dual-energy X-ray absorptiometry scanning. Vo2 and RER (respiratory exchange ratio) represents the average values recorded over a 24-h period.
* P < 0.01 vs. standard diet–fed mice.