Srf KO and wild-type mice similarly adapt to endurance exercise

Basic and applied myology

Medhi Hassani²  Athanassia Sotiropoulos⁴  Zhenlin Li⁵  Philippe Noirez⁷  Dario Coletti⁷  Nissrine Daou⁸  Haidar Djemai⁹ 

[1] Department of Exercise Science, UQAM, Montréal;IRMES, INSEP, Paris;IRMES, INSEP, Paris, France;Interuniversity Institute of Myology, Rome;Sapienza University of Rome, Rome, Italy;Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris;Sorbonne University, Paris;Sorbonne University, Paris, France;Université Paris Descartes, Sorbonne Paris Cité, Paris;Université Paris Descartes, Sorbonne Paris Cité, Paris, France

关键词: Exercice training;    serum response factor;    VO2;    RER;    Performance;   

DOI  :  10.4081/ejtm.2019.8205

学科分类：农业科学（综合）

来源: Pagepress

【 摘 要 】

Physical exercise has important effects as secondary prevention or intervention against several diseases. Endurance exercise induces local and global effects, resulting in skeletal muscle adaptations to aerobic activity and contributes to an amelioration of muscle performance. Furthermore, it prevents muscle loss. Serum response factor (Srf) is a transcription factor of pivotal importance for muscle tissues and animal models of Srf genetic deletion/over-expression are widely used to study Srf role in muscle homeostasis, physiology and pathology. A global characterisation of exercise adaptation in the absence of Srf has not been reported. We measured body composition, muscle force, running speed, energy expenditure and metabolism in WT and inducible skeletal muscle-specific Srf KO mice, following three weeks of voluntary exercise by wheel running. We found a major improvement in the aerobic capacity and muscle function in WT mice following exercise, as expected, and no major differences were observed in Srf KO mice as compared to WT mice, following exercise. Taken together, these observations suggest that Srf is not required for an early (within 3 weeks) adaptation to spontaneous exercise and that Srf KO mice behave similarly to the WT in terms of spontaneous physical activity and the resulting adaptive responses. Therefore, Srf KO mice can be used in functional muscle studies, without the results being affected by the lack of Srf. Since lack of Srf induces premature sarcopenia, our observations suggest that the modifications due to the absence of Srf take time to occur and that young, Srf KO mice behave similarly to WT in aerobic physical activities.

【 授权许可】

CC BY