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     <dc:title xml:lang="fr">Interactions entre le développement du tissu adipeux et la myogenèse chez la truite arc-en-ciel (Oncorhynchus mykiss)

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     <dcterms:alternative xml:lang="en">Interactions between adipose tissue development and myogenesis in rainbow trout (Oncorhynchus mykiss)</dcterms:alternative>
     <dc:subject xml:lang="fr">adipocytes</dc:subject><dc:subject xml:lang="fr">cellules souches musculaires</dc:subject><dc:subject xml:lang="fr">, précurseurs fibro-adipogéniques</dc:subject><dc:subject xml:lang="fr">poissons</dc:subject>
     <dc:subject xml:lang="en">adipocytes</dc:subject><dc:subject xml:lang="en">muscle stem cells</dc:subject><dc:subject xml:lang="en">fibro-adipogenic progenitors</dc:subject><dc:subject xml:lang="en">fish</dc:subject><tef:sujetRameau><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027651681">Adipocytes</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027651711">Cellules souches</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027619109">Muscles</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="270552200">Progéniteurs fibro-adipogéniques</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="032728719">Truite arc-en-ciel</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Les interactions entre tissu adipeux et musculaire, bien étudiées chez les mammifères, restent peu explorées chez les poissons. La truite arc-en-ciel, qui présente une croissance continue, représente un modèle pertinent pour l’étude de l'influence du tissu adipeux sur la croissance musculaire. Nous avons établi un modèle inédit de coculture indirecte chez les poissons, révélant que les adipocytes matures influencent le développement des cellules musculaires in vitro via des facteurs solubles. Nous observons que les adipocytes inhibent la différenciation des cellules myogéniques sans impacter leur prolifération ou l'engagement des myoblastes. De plus, notre travail met en évidence la présence de fibro-adipogenic progenitors (FAP) dans le muscle de truite et leur prolifération accrue en présence d’adipocytes. Une étude de lignées divergentes, sélectionnées pour une forte (lignée grasse) ou faible (lignée maigre) adiposité musculaire, montre une proportion plus élevée de FAP dans la lignée grasse. Nos résultats indiquent que les FAP pourraient accélérer la différenciation des myoblastes in vitro, suggérant ainsi une communication complexe impliquant trois types cellulaires. Ces travaux apportent un éclairage nouveau sur les interactions entre tissu adipeux et musculaire chez la truite arc-en-ciel et ouvrent des perspectives pour de futures recherches dans ce domaine peu exploré.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">Interactions between adipose and muscle tissues, well studied in mammals, remain largely unexplored in fish. Rainbow trout, characterized by continuous growth, represents a relevant model for investigating adipose tissue’s influence on muscle growth. We developed a novel indirect co-culture model in fish, revealing that mature adipocytes affect muscle cell development in vitro via soluble factors. Our findings indicate that adipocytes inhibit myogenic differentiation without impacting myoblast proliferation or commitment. Additionally, we highlight the presence of fibro-adipogenic progenitors (FAPs) in trout muscle and demonstrate their increased proliferation in the presence of adipocytes. A study of divergent trout lines selected for high (fat line) or low (lean line) muscle adiposity shows a higher FAP proportion in the fat line muscle. Our results suggest that FAPs may accelerate myoblast differentiation in vitro, pointing to a complex three-way cellular interaction. This work sheds light on the interplay between adipose and muscle tissues in rainbow trout and opens new avenues for research in this underexplored field.</dcterms:abstract>
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