Variations in body weight, Food Intake and body composition after long-term high-fat diet feeding in C57BL/6J mice

Academic Article

Abstract

  • © 2014 The Obesity Society. Objective: To investigate the variations in body weight, food intake, and body composition of both male and female C57BL/6J mice during a diet-induced obesity model with high-fat diet (HFD) feeding. Methods: Mice were individually housed and fed ad libitum either a low-fat diet (LFD, 10% calories from fat; n = 15 male, n = 15 female) or HFD (45% calories from fat; n = 277 male, n = 278 female) from 8 to 43 weeks of age. Body weight, food intake, and body composition were routinely measured. Results: Body weight was significantly increased with HFD (vs. LFD) in males from week 14 (P = 0.0221) and in females from week 27 (P = 0.0076). Fat mass and fat-free mass of all groups were significantly increased over time (all P<0.0001), with a large variation observed in fat mass. Baseline fat mass, fat-free mass, and daily energy intake were significant predictors of future body weight for both sexes (P<0.0001). Baseline fat mass was a significant predictor of future body fat (P<0.0001). Conclusions: Both males and females have large variations in fat mass, and this variability increases over time, while that of fat-free mass remains relatively stable. Sex differences exist in HFD responses and multivariate predicting models of body weight.
  • Published In

  • Obesity Research  Journal
  • Digital Object Identifier (doi)

    Author List

  • Yang Y; Smith DL; Keating KD; Allison DB; Nagy TR
  • Start Page

  • 2147
  • End Page

  • 2155
  • Volume

  • 22
  • Issue

  • 10