Volume 55, Issue 2 pp. 254-261
Basic and Translational Science

Effect of constitutive inactivation of the myostatin gene on the gain in muscle strength during postnatal growth in two murine models

Amalia Stantzou PhD

Amalia Stantzou PhD

Université de Versailles Saint-Quentin, Unité de formation et de recherche des sciences de la santé des sciences, Montigny-le-Bretonneux, France

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Vanessa Ueberschlag-Pitiot PhD

Vanessa Ueberschlag-Pitiot PhD

Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France

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Remi Thomasson PhD

Remi Thomasson PhD

Université Paris Descartes, Institut de Recherche bio-Médicale et d'Epidémiologie du Sport, Sorbonne Paris Cité, Paris, France

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Denis Furling PhD

Denis Furling PhD

Sorbonne Universités CNRS, Centre de Recherche en Myologie, Paris, France

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Anne Bonnieu PhD

Anne Bonnieu PhD

INRA, Université Montpellier, Dynamique Musculaire et Métabolisme, Montpellier, France

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Helge Amthor PhD

Helge Amthor PhD

Université de Versailles Saint-Quentin, Unité de formation et de recherche des sciences de la santé des sciences, Montigny-le-Bretonneux, France

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Arnaud Ferry PhD

Corresponding Author

Arnaud Ferry PhD

Sorbonne Universités CNRS, Centre de Recherche en Myologie, Paris, France

Université Paris Descartes, Sorbonne Paris Cité, Paris, France

Correspondence to: A. Ferry; G.H. Pitié-Salpétrière, 47, bld de l'Hôpital, Bâtiment Babinski, Centre de Recherche en myoLogie, 75651 Paris cedex 13, France. e-mail: [email protected]Search for more papers by this author
First published: 16 June 2016
Citations: 4

ABSTRACT

Introduction: The effect of constitutive inactivation of the gene encoding myostatin on the gain in muscle performance during postnatal growth has not been well characterized. Methods: We analyzed 2 murine myostatin knockout (KO) models, (i) the Lee model (KOLee) and (ii) the Grobet model (KOGrobet), and measured the contraction of tibialis anterior muscle in situ. Results: Absolute maximal isometric force was increased in 6-month-old KOLee and KOGrobet mice, as compared to wild-type mice. Similarly, absolute maximal power was increased in 6-month-old KOLee mice. In contrast, specific maximal force (relative maximal force per unit of muscle mass was decreased in all 6-month-old male and female KO mice, except in 6-month-old female KOGrobet mice, whereas specific maximal power was reduced only in male KOLee mice. Conclusions: Genetic inactivation of myostatin increases maximal force and power, but in return it reduces muscle quality, particularly in male mice. Muscle Nerve 55: 254–261, 2017

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