Low-Intensity Running and High-Intensity Swimming Exercises Differentially Improve Energy Metabolism in Mice With Mild Spinal Muscular Atrophy

Autor: Domenico D’Amico, Laure Weill, Valentin Rumeau, Thaïs Rouquet, Bruno Bariohay, Farah Chali, Cynthia Bezier, Céline Desseille, Julien Roux, Philippe Lopes, Léo Houdebine, Carole Oudot, Frédéric Charbonnier, Delphine Sapaly, Jean Bastin, Olivier Biondi, Judy Soukkari, Fatima Djouadi
Přispěvatelé: Toxicité environnementale, cibles thérapeutiques, signalisation cellulaire (T3S - UMR_S 1124), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Comportement nutritionnel et troubles métaboliques [La Penne-sur-Huveaune] (Biomeostasis CRO), Biomeostasis CRO [La Penne-sur-Huveaune], U.F.R. Sciences et Techniques des Activités Physiques et Sportives [Evry] (UFR STAPS - UEVE), Université d'Évry-Val-d'Essonne (UEVE), Sorbonne Université (SU), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Djouadi, Fatima
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Frontiers in Physiology
Frontiers in Physiology, Frontiers, 2019, 10, pp.1258. ⟨10.3389/fphys.2019.01258⟩
Frontiers in Physiology, Vol 10 (2019)
Frontiers in Physiology, 2019, 10, pp.1258. ⟨10.3389/fphys.2019.01258⟩
ISSN: 1664-042X
Popis: International audience; Spinal Muscular Atrophy (SMA), an autosomal recessive neurodegenerative disease characterized by the loss of spinal-cord motor-neurons, is caused by mutations on Survival-of-Motor Neuron (SMN)-1 gene. The expression of SMN2, a SMN1 gene copy, partially compensates for SMN1 disruption due to exon-7 excision in 90% of transcripts subsequently explaining the strong clinical heterogeneity. Several alterations in energy metabolism, like glucose intolerance and hyperlipidemia, have been reported in SMA at both systemic and cellular level, prompting questions about the potential role of energy homeostasis and/or production involvement in disease progression. In this context, we have recently reported the tolerance of mild SMA-like mice (SmnΔ7/Δ7; huSMN2 +/+) to 10 months of low-intensity running or high-intensity swimming exercise programs, respectively involving aerobic and a mix aerobic/anaerobic muscular metabolic pathways. Here, we investigated whether those exercise-induced benefits were associated with an improvement in metabolic status in mild SMA-like mice. We showed that untrained SMA-like mice exhibited a dysregulation of lipid metabolism with an enhancement of lipogenesis and adipocyte deposits when compared to control mice. Moreover, they displayed a high oxygen consumption and energy expenditure through β-oxidation increase yet for the same levels of spontaneous activity. Interestingly, both exercises significantly improved lipid metabolism and glucose homeostasis in SMA-like mice, and enhanced oxygen consumption efficiency with the maintenance of a high oxygen consumption for higher levels of spontaneous activity. Surprisingly, more significant effects were obtained with the high-intensity swimming protocol with the maintenance of high lipid oxidation. Finally, when combining electron microscopy, respiratory chain complexes expression and enzymatic activity measurements in muscle mitochondria, we found that (1) a muscle-specific decreased in enzymatic activity of respiratory chain I, II, and IV complexes for equal amount of mitochondria and complexes expression and (2) a significant decline in mitochondrial maximal oxygen consumption, were reduced by both exercise programs. Most of the beneficial effects were obtained with the high-intensity swimming protocol. Taking together, our data support the hypothesis that active physical exercise, including high-intensity protocols, induces metabolic adaptations at both systemic and cellular levels, providing further evidence for its use in association with SMN-overexpressing therapies, in the long-term care of SMA patients.
Databáze: OpenAIRE
Externí odkaz: