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<dc:title xml:lang="fr">Développement de glycoprotéines d’enveloppe du virus Sindbis pour les virothérapies anticancéreuses</dc:title>
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<dc:subject xml:lang="fr">Vecteurs lentiviraux</dc:subject>
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<dcterms:abstract xml:lang="fr">Les traitements anticancéreux traditionnels sont souvent insuffisants pour faire face à l’apparition de cellules résistantes, comme c’est le cas des cellules α5β1z+ des glioblastomes. Bien que l’intérêt des nouvelles stratégies, telles que les virothérapies, visant l’élimination spécifiques des cellules résistantes soit indéniable, leur développement est freiné par un manque de spécificité du ciblage. Dans le but de palier à ce problème nous avons développé des glycoprotéines d’enveloppes (GPE) du virus Sindbis bi-fonctionnalisées ciblant les cellules α5β1+. Les essais en culture cellulaire de vecteurs lentiviraux armés par nos GPE montrent une augmentation de l’efficacité et de la spécificité marquées par rapport aux GPE mono-fonctionnalisées. Nous avons aussi mis en place une méthode d’évolution dirigée en culture de cellules permettant l’optimisation de GPE spécifiquement orienté contre les cancers.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Traditional anti-cancer treatments often fail when facing the onset of resistant cells, as in the case of α5β1+ cells in glioblastoma. Even if the interest of new approaches, such as virotherapies, to eliminate specifically resistant cells is undeniable, their development is hampered by a lack of specificity of targeting. In order to overcome this problem, we have developed bi-functionalized Sindbis virus envelope glycoproteins (EGPs) targeting α5β1+ cells. Cell culture assays of lentiviral vectors armed with our GPEs show a marked increase in efficiency and specificity compared to mono-functionalized EGPs. We have also established a directed evolution method in cell culture allowing the optimization of EGPs specifically directed against cancer cells.</dcterms:abstract>
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