Variation of fat intake with estrous cycle, ovariectomy and estradiol replacement in hamsters (Mesocricetus auratus) eating a fractionated diet.
Intakes of fats, proteins, and carbohydrates were measured daily for a 3 month period in female hamsters maintained on a fractionated diet consisting of the dietary constituents, dextrose, fat and soybean meal. In the first study, hamsters showed variations in body weight and fat intake across the estrous cycle and following ovariectomy, with elevations during diestrous and after ovariectomy when endogenous estrogens are reduced. In the second study, the effects of exogenous estradiol or cholesterol on intake patterns of ovariectomized hamsters were determined. Hamsters lost weight and decreased fat intake when implanted with a silastic containing estradiol and gained weight and increased fat intake when exposed to cholesterol treatment. In neither of the two studies were the intakes of protein or carbohydrates significantly affected by the animals' hormonal status. These results suggest that in the hamster, estrogenic effects on food intake are specific to some dietary constituents and not to others.
D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002369:Castration; D002791:Cholesterol, Dietary / Q000008:administration & dosage; D006224:Cricetinae; D004041:Dietary Fats / Q000008:administration & dosage*; D004435:Eating / Q000187:drug effects; D002149:Energy Intake / Q000187:drug effects; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus / Q000187:drug effects; D005260:Female; D008647:Mesocricetus; D011247:Pregnancy
D002791:Cholesterol, Dietary; D004041:Dietary Fats; D004958:Estradiol