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Tesi sul tema "Modulation des intégrines"
Conesa, Magali. "Conséquences d'une modulation d'expression des intégrines dans la pathologie tumorale". Aix-Marseille 2, 2005. http://www.theses.fr/2005AIX22951.
Testo completoDogic, Dagmar. "Laminines, intégrines et cytosquelette dans la modulation des adhésions focales". Lyon 1, 1997. http://www.theses.fr/1997LYO10264.
Testo completoKamboj, Sahil. "Outils avancés pour la modulation du trafic des intégrines dans le cancer de l'ovaire". Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1300.
Testo completoIntegrins are heterodimeric cell surface receptors that play a critical role in governing cell-cell interactions, which subsequently influence multiscale biological processes such as cell behaviour, extracellular matrix remodeling, and tissue formation. These processes span from milliseconds to several days. Existing methodologies to study integrin function across different biological scales—from single cells to whole tissues—often prove to be chronic and lack the capability to target specific cell-cell interactions acutely.To address this limitation, we engineered cells to rapidly alter their behavior by downregulating the surface population of α5β1 integrins through a process of hot-wired clathrin-mediated endocytosis. This innovative method enables inducible, specific internalization of α5β1 integrins, achieving acute downregulation across various cell lines within 5-30 minutes. Our findings demonstrate that this induced internalization of α5β1 integrins results in a decrease in cell area, promotes the uptake of extracellular fibronectin, and reduces the rate of tumor spheroid compaction.This targeted control of multiscale processes through the rapid downregulation of α5β1 integrins highlights the utility of hot-wired endocytosis as a potent tool for acutely modulating cell biology. Our approach offers unprecedented speed in tuning the cellular microenvironment, presenting novel therapeutic avenues and innovative strategies for tissue engineering by quickly targeting cell-microenvironment interactions
Wiedemann, Agnès. "Modulation de la phagocytose par "Yersinia"". Montpellier 2, 2003. http://www.theses.fr/2003MON20005.
Testo completoHamzaoui, Nadim. "Modulation de l' expression des intégrines épithéliales par les lymphocytes des plaques de Peyer intestinales : conséquences sur les interactions entre épithélium, mésenchyme et Yersinia entéropathogènes". Paris 7, 2003. http://www.theses.fr/2003PA077161.
Testo completoGaudreault, Manon. "Modulation de l'expression du gène encodant la sous-unité d'intégrine α6 durant la cicatrisation cornéenne". Doctoral thesis, Université Laval, 2007. http://hdl.handle.net/20.500.11794/19463.
Testo completoAndjilani, Maoulana. "Modulation de la chimiosensibilité des cellules tumorales par la matrice extracellulaire : étude in vitro de la potentialisation par la laminine de l'apoptose induite par le cisplatine dans les cellules germinales tumorales du testicule humain". Lyon 1, 2005. http://www.theses.fr/2005LYO10196.
Testo completoTenaud, Isabelle. "Les mécanismes impliqués dans la régulation de la prolifération et de la différenciation kératinocytaire : intégrines (modulation par les oligo-éléments et les interférons- alpha et -gamma) et la voie de la NOS inductible". Nantes, 2000. http://www.theses.fr/2000NANT07VS.
Testo completoGingras, Marie-Ève. "La modulation de l'expression du gène de la sous-unité α5 de l'intégrine α5β1 dans le contexte de la cicatrisation cornéenne". Doctoral thesis, Université Laval, 2008. http://hdl.handle.net/20.500.11794/19852.
Testo completoLake, Jennifer. "Modulation de l'expression du gène de la sous-unité a5 de l'intégrine a5B1 par les composantes de la matrice extracellulaire durant la cicatrisation de l'épithélium cornéen". Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26193.
Testo completoUpon corneal injury, it is the massive secretion of fibronectin (FN) that characterizes the very first changes occurring in the basement membrane (BM) while in the meantime laminin (LM) and collagens (mostly type IV) temporarily disappear and then sequentially reappear once the denuded corneal area is completely covered. The FN binding integrin α5β1 plays a major role in corneal wound healing by promoting epithelial cell adhesion and migration over the temporary FN matrix. Over the past few years, our laboratory investigated the mechanisms by which the extracellular matrix (ECM) components may alter the expression of the α5 integrin subunit gene during corneal wound healing. While FN was found to positively regulate the expression of the α5 gene promoter, LM surprisingly repressed its transcription in rabbit corneal epithelial cells. However, the individual influences of collagens, or the combinatorial influence of a more complex tissue-engineered ECM had yet to be determined. In this thesis, we demonstrated that the reconstructed ECM, which is enriched in several types of collagens and FN, exerts a positive influence on the expression of the α5 gene in human corneal epithelial cells as a result of alterations in the expression and DNA binding of the transcription factors NFI, Sp1, AP-1 and Pax-6. On the other hand, collagens most usually acted negatively on the expression of the α5 integrin gene in corneal epithelial cells (CECs). One can then speculate that a particularly important function of the corneal BM collagens would consist to inform CECs that cell migration is no longer required, allowing them to differentiate vertically into suprabasal epithelial cells. We also demonstrated that a 300 bp conserved 5’-distal region present in the α3, α5, α9 and αv integrin subunit gene promoter sequences contains several target sites for positive and negative transcription factors that may prove important for fine-tuned regulation of α5 gene transcription. In addition, the ECM components also cause important changes in the expression of other genes, such as those encoding matrix metalloproteinases (MMPs) and various ECM components.