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Xia Z, Cholewa J, Zhao Y, Yang YQ, Shang HY, Guimarães-Ferreira L, Naimo MA, Su QS, Zanchi NE. Hypertrophy-Promoting Effects of Leucine Supplementation and Moderate Intensity Aerobic Exercise in Pre-Senescent Mice. Nutrients 2016; 8:nu8050246. [PMID: 27144582 PMCID: PMC4882659 DOI: 10.3390/nu8050246] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 01/01/2023] Open
Abstract
Several studies have indicated a positive influence of leucine supplementation and aerobic training on the aging skeletal muscle signaling pathways that control muscle protein balance and muscle remodeling. However, the effect of a combined intervention requires further clarification. Thirteen month old CD-1® mice were subjected to moderate aerobic exercise (45 min swimming per day with 3% body weight workload) and fed a chow diet with 5% leucine or 3.4% alanine for 8 weeks. Serum and plasma were prepared for glucose, urea nitrogen, insulin and amino acid profile analysis. The white gastrocnemius muscles were used for determination of muscle size and signaling proteins involved in protein synthesis and degradation. The results show that both 8 weeks of leucine supplementation and aerobic training elevated the activity of mTOR (mammalian target of rapamycin) and its downstream target p70S6K and 4E-BP1, inhibited the ubiquitin-proteasome system, and increased fiber cross-sectional area (CSA) in white gastrocnemius muscle. Moreover, leucine supplementation in combination with exercise demonstrated more significant effects, such as greater CSA, protein content and altered phosphorylation (suggestive of increased activity) of protein synthesis signaling proteins, in addition to lower expression of proteins involved in protein degradation compared to leucine or exercise alone. The current study shows moderate aerobic training combined with 5% leucine supplementation has the potential to increase muscle size in fast-twitch skeletal muscle during aging, potentially through increased protein synthesis and decreased protein breakdown.
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Affiliation(s)
- Zhi Xia
- Exercise Physiology and Biochemistry Laboratory, College of Physical Education, Jinggangshan University, Ji'an 343009, China.
- Exercise Intervention and Health Promotion Hubei Province Synergy Innovation Center, Wuhan Sports University, Wuhan 430079, China.
| | - Jason Cholewa
- Department of Kinesiology, Coastal Carolina University, Conway, SC 29528-6054, USA.
| | - Yan Zhao
- Exercise Physiology and Biochemistry Laboratory, College of Physical Education, Jinggangshan University, Ji'an 343009, China.
| | - Yue-Qin Yang
- Exercise Intervention and Health Promotion Hubei Province Synergy Innovation Center, Wuhan Sports University, Wuhan 430079, China.
| | - Hua-Yu Shang
- Exercise Physiology Laboratory, Department of Exercise Physiology, Beijing Sport University, Beijing 100084, China.
| | - Lucas Guimarães-Ferreira
- Muscle Physiology and Human Performance Research Group, Center of Physical Education and Sports, Federal University of Espirito Santo, Vitória/ES 29075-810, Brazil.
| | - Marshall Alan Naimo
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV 26506-9227, USA.
| | - Quan-Sheng Su
- Department of Sports Medicine, Chengdu Sport University, Chengdu 610041, China.
| | - Nelo Eidy Zanchi
- Department of Physical Education, Federal University of Maranhão (UFMA), São Luís-MA 65020-070, Brazil.
- Laboratory of Cellular and Molecular Biology of Skeletal Muscle (LABCEMME), São Luís-MA 65020-070, Brazil.
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Effect of combining music media therapy with lower extremity exercise on elderly patients with diabetes mellitus. Int J Nurs Sci 2015. [DOI: 10.1016/j.ijnss.2015.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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