Photoperiod Regulates Lean Mass Accretion, but Not Adiposity, in Growing F344 Rats Fed a High Fat Diet
Fig 2
Effect of photoperiod and high fat diet (HFD) on epididymal fat, lean mass and liver and kidney weight of juvenile F344 rats over, or after, 4 weeks of treatment.
(a) Epididymal fat pad mass as a percentage of body weight, was greater in LD than SD chow fed rats (p = 0.048). The fat pads masses were significantly greater with HFD feeding than chow in both photoperiods (p<0.001), but there was no effect of photoperiod with HFD feeding. (b) Absolute lean mass was higher in LD than SD rats fed either chow or HFD. The lean masses were not changed by HFD feeding. (c) Lean mass as a percentage of body weight was not significantly different between LD and SD chow fed rats. The lean masses of HFD fed rats were lower than those of the chow fed rats with the SD HFD fed rats being significantly leaner than the LD HFD fed rats (p<0.001). (d) Liver mass was lower in SD than LD chow and HFD fed rats (both p<0.05). The HFD did not impact on the liver masses in either photoperiod. (e) Kidney mass was also lower in both SD chow and HFD fed rats than chow fed LD (P<0.05).