title: Aerobic Training Increases Expression Levels of SIRT3 and PGC-1α in Skeletal Muscle of Overweight Adolescents Without Change in Caloric Intake.
abstract: Sirtuin 3 enzyme (SIRT3) is involved in the regulation of mitochondrial energy homeostasis by activating Peroxisome proliferator-activated receptor-gamma coactivator (PGC-1α). Murine models have shown that the protein SIRT3 was modified by exercise and diet, however, the effect of exercise without diet in humans has not been examined. Propose of this paper was to analyze the effect of aerobic training on SIRT3 and PGC-1α in skeletal muscle of overweight adolescents without change in caloric intake. Fourteen overweight or obese male adolescents (15.5 ± 0.8 years) trained 3 days-week/50 min × session, at 70-80% of maximal heart rate for 12 weeks. Anthropometrics and skeletal muscle biopsies from the vastus lateralis were taken before and after the exercise program to measure adiposity, SIRT3, and PGC-1α proteins. Peak aerobic capacity (VO2peak) was estimated before and after training. The participants did not change their eating habits during the intervention. SIRT3 (1.05 ± 0.11 vs. 1.25 ± 0.14 AU, p = .014) and PGC-1a (1.06 ± 0.15 Vs 1.39 ± 0.20 AU, p = .009) increased. Fat percentage and waist circumference decreased (p < .05). VO2peak increased after training (p < .001). There was a significant association between SIRT3 and PGC-1α after training program. These data suggest that aerobic training increased SIRT3 and PGC-1a expression levels in sedentary, overweight, or obese adolescents.
authors: Dept. of Medical Sciences, Universidad de Guanajuato, Leon, Guanajuato, Mexico.
authors: Katya
authors: K
authors: Vargas-Ortiz
authors: Victoriano
authors: V
authors: Perez-Vazquez
authors: Francisco J
authors: FJ
authors: Diaz-Cisneros
authors: Arturo
authors: A
authors: Figueroa
authors: Lizbeth M
authors: LM
authors: Jiménez-Flores
authors: Gustavo
authors: G
authors: Rodriguez-DelaRosa
authors: Maciste H
authors: MH
authors: Macias
mesh_terms: D050154:Adiposity; D000293:Adolescent; D002149:Energy Intake; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D009765:Obesity / Q000378:metabolism; D050177:Overweight / Q000378:metabolism*; D010101:Oxygen Consumption; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D052097:Quadriceps Muscle / Q000378:metabolism*; D057185:Sedentary Behavior; D056566:Sirtuin 3 / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*; D055105:Waist Circumference
chemical_list: C486497:PPARGC1A protein, human; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D014157:Transcription Factors; C466093:SIRT3 protein, human; D056566:Sirtuin 3