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<dc:title xml:lang="en">Dynamics, specialization and function of muscle nuclei in skeletal muscle</dc:title>
<dcterms:alternative xml:lang="fr">Dynamique, spécialisation et fonction des noyaux musculaires dans le muscle squelettique</dcterms:alternative>
<dc:subject xml:lang="fr">Muscle squelettique</dc:subject>
<dc:subject xml:lang="fr">Syncytium</dc:subject>
<dc:subject xml:lang="fr">Renouvellement nucléaire</dc:subject>
<dc:subject xml:lang="fr">Autophagie</dc:subject>
<dc:subject xml:lang="fr">Stress oxydant</dc:subject>
<dc:subject xml:lang="fr">Jonction myotendineuse</dc:subject>
<dc:subject xml:lang="fr">Hétérogénéité spatiale</dc:subject>
<dc:subject xml:lang="en">Skeletal muscle</dc:subject>
<dc:subject xml:lang="en">Syncytium</dc:subject>
<dc:subject xml:lang="en">Nuclear turnover</dc:subject>
<dc:subject xml:lang="en">Autophagy</dc:subject>
<dc:subject xml:lang="en">Oxidative stress</dc:subject>
<dc:subject xml:lang="en">Myotendinous junction</dc:subject>
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<tef:elementdEntree autoriteExterne="028107667" autoriteSource="Sudoc">Muscles striés</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="028118952" autoriteSource="Sudoc">Noyau cellulaire</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Le muscle squelettique est un syncytium multinucléé soumis à des contraintes mécaniques et métaboliques continues. Les myonucléus n’y constituent pas une population stable : ils sont soumis à un renouvellement continu en conditions homéostatiques. Cette dynamique n’est pas homogène le long de la fibre, avec une accélération marquée au niveau de la jonction myotendineuse. Le stress oxydant contribue au déclenchement de l’élimination nucléaire, tandis que l’autophagie en assure le mécanisme effecteur. L’altération de ce processus favorise l’accumulation de noyaux à signature inflammatoire et sénescente. En parallèle, la mise en place d’outils viraux et de modèles murins ciblés a permis d’identifier et d’analyser des sous-types nucléaires spécialisés au sein de domaines musculaires définis. Ces résultats redéfinissent le muscle adulte comme un système nucléaire dynamique, surveillé et spatialement organisé.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Skeletal muscle is a multinucleated syncytium constantly exposed to mechanical and metabolic stress. Within this shared cytoplasm, myonuclei do not form a static population but undergo continuous turnover under homeostatic conditions. This renewal is not uniform along the fiber and is particularly pronounced at the myotendinous junction. Oxidative stress contributes to triggering selective nuclear elimination, with autophagy acting as the central effector mechanism. When this process is impaired, nuclei displaying inflammatory and senescent features accumulate, linking nuclear dynamics to long-term muscle homeostasis. In parallel, the development of viral and genetic mouse tools enabled the detection and characterization of specialized myonuclear subtypes within defined muscle domains, highlighting the spatial organization of nuclear function in adult muscle. Together, these findings position adult skeletal muscle as a dynamic and spatially organized nuclear system maintained through continuous quality control.</dcterms:abstract>
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