PLA-poloxamer/poloxamine copolymers for ligament tissue engineering: sound macromolecular design for degradable scaffolds and MSC differentiation
Résumé
The treatment of anterior cruciate ligament (ACL) failures remains a current clinical challenge. The
present study aims at providing suitable degradable scaffolds for ligament tissue engineering. First, we
focus on the design and the evaluation of poly(lactide)/poloxamer or poly(lactide)/poloxamine multiblock
copolymers selected and developed to have suitable degradation and mechanical properties to match
ACL repair. In the second part, it is shown that the copolymers can be processed in the form of
microfibers and scaffolds consisting of a combination of twisted/braided fibers to further modulate the
mechanical properties and prepare scaffold prototypes suitable for ligament application. Finally, after
assessment of their cytocompatibility, the polymer scaffolds are associated with mesenchymal stem cells
(MSCs). MSC differentiation toward a ligament fibroblast phenotype is promoted by a dual stimulation
including an inductive culture medium and cyclic mechanical loads. RT-qPCR analyses confirm the
potential of our scaffolds and MSCs for ACL regeneration with upregulation of some differentiation
markers including Scleraxis, Tenascin-C and Tenomodulin.
Domaines
Matériaux
Fichier principal
Leroy et al. Biomat Sci 2016.pdf (1.01 Mo)
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Leroy et al. Biomat Sci 2016 _ sup data.pdf (454.16 Ko)
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