[Thermogenesis induced by diet in the 2- and 7-day-old Zucker rat].
Gas exchanges were measured at the thermoneutral temperature of 35 degrees C on "fasted" (3 h 30 min) and then "refed" (75 min) fa/fa and Fa/fa rats aged 2 and 7 days. The CO2 production, O2 consumption and respiratory quotient increased significantly after refeeding in all pups. The percentage of increase in the gas exchanges was similar in both genotypes at 2 days. At 7 days, the percentage of increase was significantly higher in Fa/fa than in fa/fa pups. This demonstrated a defect in diet-induced thermogenesis in 7-day old pups. However, since this defect (unlike non-shivering thermogenesis) was absent in 2-day old pups, it is concluded that it is probably not a primary factor but rather a consequence of the obesity already present in fa/fa pups at 7 days of age.
D000375:Aging; D000818:Animals; D001833:Body Temperature Regulation; D005215:Fasting; D005502:Food; D009765:Obesity / Q000378:metabolism*; D010101:Oxygen Consumption; D011659:Pulmonary Gas Exchange; D051381:Rats; D011924:Rats, Zucker
La thermogenèse induite par l'alimentation chez le rat Zucker âgé de 2 et 7 jours.