Metabolic Characteristics and Body Composition in a Model of Anti-Obese Rats (Lou/C)
Article first published online: 6 SEP 2012
2002 North American Association for the Study of Obesity (NAASO)
Volume 10, Issue 3, pages 188–195, March 2002
How to Cite
Couturier, K., Servais, S., Koubi, H., Sempore, B., Sornay-Mayet, M.-H., Cottet-Emard, J.-M., Lavoie, J.-M. and Favier, R. (2002), Metabolic Characteristics and Body Composition in a Model of Anti-Obese Rats (Lou/C). Obesity Research, 10: 188–195. doi: 10.1038/oby.2002.29
- Issue published online: 6 SEP 2012
- Article first published online: 6 SEP 2012
- Submitted for publication September 18, 2001. Accepted for publication in final form December 17, 2001
- lipid profile;
- food intake;
- fat depots;
- muscle weights;
Objective: The aims of this study were to investigate some features of the metabolic profile and the body composition of male Lou/C rats and to examine whether these characteristics are strictly related to the food-intake reduction.
Research Methods and Procedures: Fourteen-week-old male Lou/C rats were compared with age-matched male Wistar rats fed ad libitum (WAL) and another group of male Wistar rats whose food was chronically restricted (WFR) to the same amount as the Lou/C rats from weeks 3 to 14.
Results: Food intake and body weight were significantly (p < 0.01) reduced in Lou/C compared with WAL rats, whereas these reductions were perfectly reproduced in WFR rats. Lou/C rats demonstrated lower relative weights of retroperitoneal (0.97 ± 0.07 vs. 1.67 ± 0.16 and 1.88 ± 0.15 g/100 g body) and epididymal (1.01 ± 0.02 vs. 1.62 ± 0.12 and 1.80 ± 0.11 g/100g body) fat depots than did the two other groups and no decrease in the percentage of carcass proteins, which was observed in the WFR rats. In addition, compared with the WFR group, the Lou/C rats showed lower plasma glucose levels (3.65 ± 0.14 vs. 4.72 ± 0.15 and 4.7 ± 0.19 mM); a tendency (p < 0.1) for lower liver glycogen concentrations; and similar levels of glycerol, free fatty acids, and β-hydroxybutyrate concentrations. Epinephrine and the relative weight of the adrenal glands were significantly (p < 0.01) lower in the Lou/C rats than in the WAL rats and the two other groups, respectively.
Discussion: The ability of the Lou/C rats to accumulate less body fat than their equally food-restricted Wistar counterparts (WFR) suggests a difference in basal metabolism in this strain of rats that resembles obesity-resistant rats.