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| DOI | 10.14814/PHY2.13599 | ||||
| Año | 2018 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Exercise regimens may have differing effects in the presence of obesity. In addition to being fat derived, adiponectin has recently been described as a myokine that regulates insulin sensitivity, which may link to exercise-related metabolic benefits in obesity. Whether skeletal muscle adiponectin varies in different exercise modalities is unclear. This study investigated the comparative effects of 10 weeks of endurance constant-moderate intensity exercise (END) with high intensity interval training (HIIT), on metabolic outcomes, including muscle adiponectin in a mouse model of diet-induced obesity. Ten-week-old male C57BL/6 mice were fed a high-fat diet (HFD) (45% FAT) or standard CHOW diet ab libitum and underwent one of three training regimes: (1) no exercise, (2) END, or (3) HIIT (8 bouts of 2.5 min with eight periods of rest of 2.5 min) for 10 weeks (3x40 min sessions/week). Chow-fed mice acted as controls. Compared with HFD alone, both training programs similarly protected against body weight gain (HFD = 45 +/- 2; END = 37 +/- 2; HIIT = 36 +/- 2 g), preserved lean/fat tissue mass ratio (HFD = 0.64 +/- 0.09; END = 0.34 +/- 0.13; HIIT = 0.33 +/- 0.13), and improved blood glucose excursion during an insulin tolerance test (HFD = 411 +/- 54; END = 350 +/- 57; HIIT = 320 +/- 66 arbitrary units [AU]). Alterations in fasting glycemia, insulinemia, and AST/ALT ratios were prevented only by END. END, but not HIIT increased skeletal muscle adiponectin mRNA (14-fold; P<0.05) and increased protein content of high molecular weight (HMW) adiponectin (3.3-fold), whereas HIIT induced a milder increase (2.4-fold). Compared with HFD, neither END nor HIIT altered circulating low (LMW) or high (HMW) molecular weight adiponectin forms. Furthermore, only END prevented the HFD downregulation of PGC1 alpha (P<0.05) mRNA levels downstream of muscle adiponectin. These data show that different training programs affect muscle adiponectin to differing degrees. Together these results suggest that END is a more effective regimen to prevent HFD-induced metabolic disturbances in mice.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | MARTINEZ-HUENCHULLAN, SERGIO FRANCISCO | Hombre |
UNIV SYDNEY - Australia
Universidad Austral de Chile - Chile Sydney Medical School - Australia The University of Sydney - Australia The University of Sydney School of Medicine - Australia |
| 2 | Maharjan, Babu Raja | Hombre |
UNIV SYDNEY - Australia
Sydney Medical School - Australia The University of Sydney - Australia The University of Sydney School of Medicine - Australia |
| 3 | Williams, Paul F. | Hombre |
UNIV SYDNEY - Australia
Sydney Medical School - Australia The University of Sydney - Australia The University of Sydney School of Medicine - Australia |
| 4 | Tam, Charmaine S. | Mujer |
UNIV SYDNEY - Australia
The University of Sydney - Australia The University of Sydney Northern Clinical School - Australia |
| 5 | McIennan, Susan V. | Mujer |
UNIV SYDNEY - Australia
New South Wales Hlth Pathol - Australia The University of Sydney - Australia New South Wales Health Pathology - Australia |
| 5 | Mclennan, Susan V. | Mujer |
Sydney Medical School - Australia
New South Wales Health - Australia The University of Sydney School of Medicine - Australia New South Wales Hlth Pathol - Australia New South Wales Health Pathology - Australia |
| 6 | Cascone, E. | Hombre |
UNIV SYDNEY - Australia
Royal Prince Alfred Hosp - Australia Sydney Medical School - Australia Royal Prince Alfred Hospital - Australia The University of Sydney - Australia The University of Sydney School of Medicine - Australia |
| Fuente |
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| Comisión Nacional de Investigación Científica y Tecnológica |
| Fondo de Fomento al Desarrollo Científico y Tecnológico |
| Comisión Nacional de Investigación CientÃfica y Tecnológica |
| National Health and Medical Research Council |
| National Health and Medical Research Council (NHMRC) |
| National Commission for Scientific and Technological Research (CONICYT) Becas Chile Scholarship |
| Agradecimiento |
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| SM-H is supported in this work by a National Commission for Scientific and Technological Research (CONICYT) Becas Chile Scholarship for foreign PhD programs (Resolucion Exenta No 2185/2015). CST is supported by a National Health and Medical Research Council (NHMRC) Early Career Fellowship (# 1037275). |
| SM-H is supported in this work by a National Commission for Scientific and Technological Research (CONICYT) Becas Chile Scholarship for foreign PhD programs (Resolución Exenta No 2185/2015). CST is supported by a National Health and Medical Research Council (NHMRC) Early Career Fellowship (#1037275). |