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<dc:title xml:lang="fr">Influence de la rigidité du substrat sur la migration des cellules souches de la pulpe dentaire</dc:title>
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<dc:subject xml:lang="fr">Ingénierie tissulaire dentaire</dc:subject>
<dc:subject xml:lang="fr">Mécanotransduction</dc:subject>
<dc:subject xml:lang="fr">Cellules souches de la pulpe dentaire</dc:subject>
<dc:subject xml:lang="fr">Polydiméthylsiloxane</dc:subject>
<dc:subject xml:lang="fr">Cytosquelette</dc:subject>
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<dc:subject xml:lang="en">Dental tissue engineering</dc:subject>
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<dc:subject xml:lang="en">Dental pulp stem cells</dc:subject>
<dc:subject xml:lang="en">Polydimethylsiloxane</dc:subject>
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<dcterms:abstract xml:lang="fr">La migration des cellules souches de la pulpe dentaire (DPSCs) est un aspect fondamental de l’ingénierie tissulaire dentaire. L’objectif de cette thèse est de déterminer l’influence de la rigidité du substrat sur la migration des DPSCs. Dans une première partie, nous avons montré que les DPSCs sont capables de survivre et de proliférer sur des substrats de polydiméthylsiloxane (PDMS) avec un module de Young de 1,5 kPa à 2,5 MPa sans se différencier. Nous avons observé que la vitesse moyenne des DPSCs est augmentée sur les substrats de faible rigidité. De plus, la Yes-associated protein (YAP) conserve une localisation nucléaire même sur les PDMS de faible rigidité. Finalement, nous avons montré que sur un substrat comportant deux rigidités différentes, les DPSCs n’adoptent pas de direction de migration préférentielle, contrairement au phénomène de durotaxie classiquement décrit dans la littérature.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Migration of dental pulp stem cells (DPSCs) is a fundamental aspect of dental tissue engineering. The objective of this thesis is to investigate the influence of substrate stiffness on DPSCs migration. In the first part of this thesis, we showed that DPSCs are able to survive and proliferate on polydimethylsiloxane substrates (PDMS) with a Young's modulus of 1.5 kPa to 2.5 MPa without differentiating themselves. We observed that the average speed of DPSCs is increased on substrates with low stiffness. In addition, the Yes-associated protein (YAP) maintains a nuclear localization even on PDMS with low rigidity. Finally, we have shown that on a substrate with two different stiffnesses, DPSCs do not adopt any preferential migration direction, unlike the process of durotaxis classically described in the literature.</dcterms:abstract>
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