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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Haramizu, Satoshi Nagasawa, Azumi Ota, Noriyasu Hase, Tadashi Tokimitsu, Ichiro Murase, Takatoshi |
| Description | Country affiliation: Japan Author Affiliation: Haramizu S ( Biological Science Laboratories, Kao Corporation, Ichikai-machi, Haga-gun, Tochigi, Japan.) |
| Abstract | We investigated strain differences in whole body energy metabolism, peripheral lipid metabolism, and energy metabolism-related gene expression and protein levels in BALB/c, C57BL/6J, and A/J mice to evaluate the relationship between endurance capacity, susceptibility to diet-induced obesity, and differences in lipid metabolism in muscle and liver. A high-fat diet significantly increased body weight and fat weight in C57BL/6J mice, but not in BALB/c and A/J mice. The endurance capacity of BALB/c mice was 52% greater than that of C57BL/6J mice and 217% greater than that of A/J mice. The respiratory exchange ratio was lowest in BALB/c mice, higher in C57BL/6J mice, and highest in A/J mice, which inversely correlated with the endurance capacity and fatty acid beta-oxidation activity in the muscle. Plasma lactate levels measured immediately after exercise were lowest in BALB/c mice and highest in A/J mice, although there was no difference under resting conditions, suggesting that carbohydrate breakdown is suppressed by enhanced fat utilization during exercise in BALB/c mice. On the other hand, the body weight increase induced by high-fat feeding was related to a reduced whole body energy expenditure, higher respiratory quotient, and lower fatty acid beta-oxidation activity in the liver. In addition, beta-oxidation activity in the muscle and liver roughly paralleled the mRNA and protein levels of lipid metabolism-related molecules, such as peroxisome proliferator-activated receptor and medium-chain acyl-CoA dehydrogenase, in each tissue. These findings indicate that genetically determined basal muscle and liver lipid metabolism and responsiveness to exercise influence physical performance and obesity susceptibility. |
| File Format | HTM / HTML |
| ISSN | 87507587 |
| e-ISSN | 15221601 |
| Journal | Journal of Applied Physiology |
| Issue Number | 3 |
| Volume Number | 106 |
| Language | English |
| Publisher | American Physiological Society |
| Publisher Date | 2009-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Physiology Energy Metabolism Genetics Lipid Metabolism Liver Metabolism Muscle, Skeletal Obesity Physical Endurance Acyl-coa Dehydrogenase Animals Dietary Fats Administration & Dosage Drug Effects Fatty Acids Genetic Predisposition To Disease Mice Mice, Inbred Strains Etiology Oxidation-reduction Ppar Alpha Species Specificity Weight Gain |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Sports Science |
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