Konhilas 2015 Am J Physiol Heart Circ Physiol
| Konhilas JP, Chen H, Luczak E, McKee LA, Regan J, Watson PA, Stauffer BL, Khalpey ZI, Mckinsey TA, Horn T, LaFleur B, Leinwand LA (2015) Diet and sex modify exercise and cardiac adaptation in the mouse. Am J Physiol Heart Circ Physiol 308:H135-45. |
Β» PMID: 25398983 ; Open Access
Konhilas JP, Chen H, Luczak E, McKee LA, Regan J, Watson PA, Stauffer BL, Khalpey ZI, Mckinsey TA, Horn T, LaFleur B, Leinwand LA (2015) Am J Physiol Heart Circ Physiol
Abstract: The heart adapts to exercise stimuli in a sex-dimorphic manner when mice are fed the traditional soy-based chow. Females undergo more voluntary exercise (4 wk) than males and exhibit more cardiac hypertrophy per kilometer run (18, 32). We have found that diet plays a critical role in cage wheel exercise and cardiac adaptation to the exercise stimulus in this sex dimorphism. Specifically, feeding male mice a casein-based, soy-free diet increases daily running distance over soy-fed counterparts to equal that of females. Moreover, casein-fed males have a greater capacity to increase their cardiac mass in response to exercise compared with soy-fed males. To further explore the biochemical mechanisms for these differences, we performed a candidate-based RT-PCR screen on genes previously implicated in diet- or exercise-based cardiac hypertrophy. Of the genes screened, many exhibit significant exercise, diet, or sex effects but only transforming growth factor-Ξ²1 shows a significant three-way interaction with no genes showing a two-way interaction. Finally, we show that the expression and activity of adenosine monophosphate-activated kinase-Ξ±2 and acetyl-CoA carboxylase is dependent on exercise, diet, and sex. β’ Keywords: Cardiac hypertrophy, Diet, Sex and exercise, Soy
Labels: MiParea: nDNA;cell genetics, Gender, Exercise physiology;nutrition;life style
Organism: Mouse
Tissue;cell: Heart
Preparation: Intact organism
