Growth Hormone Replacement Therapy Prevents Sarcopenia by a Dual Mechanism: Improvement of Protein Balance and of Antioxidant Defenses (original) (raw)

Journal Article

,

1

Department of Physiology, University of Valencia, Fundacion Investigacion Hospital Clinico Universitario/INCLIVA

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Spain

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2

Laboratory “Movement Sport and Health Sciences,” University Rennes

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France

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3

Department of Physiology, University Complutense of Madrid

,

Spain

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3

Department of Physiology, University Complutense of Madrid

,

Spain

.

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,

2

Laboratory “Movement Sport and Health Sciences,” University Rennes

,

France

.

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,

3

Department of Physiology, University Complutense of Madrid

,

Spain

.

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,

1

Department of Physiology, University of Valencia, Fundacion Investigacion Hospital Clinico Universitario/INCLIVA

,

Spain

.

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1

Department of Physiology, University of Valencia, Fundacion Investigacion Hospital Clinico Universitario/INCLIVA

,

Spain

.

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Accepted:

16 October 2013

Published:

03 December 2013

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T. Brioche, R. A. Kireev, S. Cuesta, A. Gratas-Delamarche, J. A. Tresguerres, M. C. Gomez-Cabrera, J. Viña, Growth Hormone Replacement Therapy Prevents Sarcopenia by a Dual Mechanism: Improvement of Protein Balance and of Antioxidant Defenses, The Journals of Gerontology: Series A, Volume 69, Issue 10, October 2014, Pages 1186–1198, https://doi.org/10.1093/gerona/glt187
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Abstract

The aim of our study was to elucidate the role of growth hormone (GH) replacement therapy in three of the main mechanisms involved in sarcopenia: alterations in mitochondrial biogenesis, increase in oxidative stress, and alterations in protein balance. We used young and old Wistar rats that received either placebo or low doses of GH to reach normal insulin-like growth factor-1 values observed in the young group. We found an increase in lean body mass and plasma and hepatic insulin-like growth factor-1 levels in the old animals treated with GH. We also found a lowering of age-associated oxidative damage and an induction of antioxidant enzymes in the skeletal muscle of the treated animals. GH replacement therapy resulted in an increase in the skeletal muscle protein synthesis and mitochondrial biogenesis pathways. This was paralleled by a lowering of inhibitory factors in skeletal muscle regeneration and in protein degradation. GH replacement therapy prevents sarcopenia by acting as a double-edged sword, antioxidant and hypertrophic.

© The Author 2013. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Topic:

• aging
• antioxidants
• oxidative stress
• somatotropin
• mitochondria
• origin of life
• body composition
• insulin-like growth factor i
• skeletal muscles
• plasma
• rats, wistar
• somatropin
• enzymes
• rats
• protein biosynthesis
• lean body mass
• growth hormone therapy
• sarcopenia
• protein turnover
• gastrocnemius muscle

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