Identification de marqueurs protéomiques liés à la réponse positive induite par l'entraînement physique observée chez la population atteinte de dystrophie myotonique de type 1

Authors: Aoussim, Amira
Advisor: Duchesne, ÉliseLaprise, Catherine
Abstract: Myotonic dystrophy type 1 (DM1) is the most common myopathy in adults. It is a multisystemic disease affecting several systems such as the nervous, cardiac, digestive, endocrine systems, and in particular the skeletal muscle, on which my work focuses. Indeed, the skeletal muscle is severely weakened: affected individuals suffer from muscle atrophy and experience a progressive loss of maximum muscle strength. To counter these deficiencies, muscle strengthening is a promising therapeutic strategy. Exercise is safe and effective to increase muscle strength in DM1 but for now, the underlying biological mechanisms remain unknown. The pilot study of the works here presented showed significant gains in muscle strength and functional capacity of 11 men with DM1 who participated in a 12-week supervised strength training program. To identify the underlying mechanisms involved in these clinical gains, muscle samples collected from participants before and after training were studied. Proteomics analysis showed that several molecular functions and biological processes were improved by the training program. Specifically, the modulation of the proteome through exercise was related to energy metabolism, myogenesis, immunity, muscle contraction, insulin signaling, and apoptosis. These results suggest that muscle adaptation is possible in DM1 at the clinical and biological levels. Finally, the identification of muscle biomarkers by proteomics could lay the foundations of precision medicine to improve future therapeutic treatments in DM1.
Document Type: Mémoire de maîtrise
Issue Date: 2022
Open Access Date: 18 April 2022
Grantor: Université Laval
Collection:Thèses et mémoires

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