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L'induction in vitro de marqueurs spécifiques au tendon dans les cellules tendineuses, cellules souches dérivées de la moelle osseuse et adipeuses, dépend du TGFβ3, de la BMP-12 et de la stimulation par l'acide ascorbique.

Les cellules souches mésenchymateuses (CSM) et les progéniteurs spécifiques des tissus ont été proposés comme outils utiles pour les approches de médecine régénérative dans les pathologies liées aux os, au cartilage et aux tendons. La différenciation des cellules en fonction de la lignée souhaitée, spécifique du tissu cible, a démontré des avantages pour l'application des thérapies cellulaires et de l'ingénierie tissulaire. Contrairement à la différenciation ostéogénique et chondrogénique, il n'existe pas de consensus sur le meilleur protocole d'induction ténogénique. De nombreux facteurs de croissance ont été proposés à cette fin, notamment BMP-12, b-FGF, TGF-bêta3, CTGF, IGF-1 et acide ascorbique (AA). Dans cette étude, différentes combinaisons de ces facteurs de croissance ont été testées dans le cadre d'un protocole de différenciation en deux étapes, afin de définir leur contribution à l'induction et au maintien de l'expression des marqueurs tendineux dans les CSM et les cellules tendineuses dérivées du tissu adipeux et de la moelle osseuse. (TC), respectivement. Nos résultats démontrent que le TGF-beta3 est le principal inducteur de la scléraxie, un marqueur tendineux exprimé tôt, tout en inhibant les marqueurs tendineux normalement exprimés plus tard, tels que la décorine. En revanche, nous trouvons que la décorine est induite par BMP-12, b-FGF et AA. Nos résultats fournissent de nouvelles informations sur l'effet de différents facteurs sur l'induction ténogénique des CSM et des TC, soulignant l'importance du minutage différentiel dans la stimulation du TGF-beta3.


Source: https://www.ncbi.nlm.nih.gov/pubmed/30609804


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