title: Influence of dietary protein level on body composition and energy expenditure in calorically restricted overweight cats.
abstract: High-protein (HP) diets help prevent loss of lean mass in calorie-restricted (CR) cats. However, it is not entirely known whether these diets also induce changes of energy expenditure during periods of CR. To investigate this issue, sixteen overweight cats were fed either a high-protein [(HP), 54.2% of metabolizable energy (ME)] or a moderate-protein [(MP), 31.5% of ME] diet at 70% of their maintenance energy intakes for 8 weeks, and energy expenditure, energy intake, body weight and composition, and serum metabolites and hormones were measured. While both groups of cats lost weight at a similar rate, only cats eating the HP diet maintained lean mass during weight loss. Indirect respiration calorimetry measurements revealed that both total and resting energy expenditure (kcal/d) significantly decreased during weight loss for both treatment groups. However, only cats eating the MP diet exhibited significant decreases of total and resting energy expenditures after energy expenditure was normalized for body weight or lean mass. Results from this study suggest that in addition to sparing the loss of lean mass, feeding HP diets to overweight cats in restricted amounts may be beneficial for preventing or minimizing decreases of mass-adjusted energy expenditure during weight loss.
authors: Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
authors: X
authors: X
authors: des Courtis
authors: A
authors: A
authors: Wei
authors: P H
authors: PH
authors: Kass
authors: A J
authors: AJ
authors: Fascetti
authors: J L
authors: JL
authors: Graham
authors: P J
authors: PJ
authors: Havel
authors: J J
authors: JJ
authors: Ramsey
mesh_terms: D000818:Animals; D001823:Body Composition / Q000187:drug effects*; D031204:Caloric Restriction / Q000662:veterinary*; D002371:Cat Diseases / Q000178:diet therapy*; D002415:Cats; D004044:Dietary Proteins / Q000494:pharmacology*; D004734:Energy Metabolism / Q000187:drug effects*; D005260:Female; D008297:Male; D050177:Overweight / Q000178:diet therapy / Q000662:veterinary*; D013047:Specific Pathogen-Free Organisms; D016474:Weight-Bearing
chemical_list: D004044:Dietary Proteins
keywords: energy restriction; feline; obesity; weight loss