Microsoft Word - TESIS CAYROL ARCHIVO FINAL

The interaction of lymphoid tumor cells with components of the extracellular matrix via the integrin ?v?3 allows tumor survival and growth. This integrin was demonstrated to be the membrane receptor for thyroid hormones in several tissues. We found that thyroid hormones (THs), acting as soluble inte...

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Autor principal: Cayrol, María Florencia
Otros Autores: Cerchietti, Leandro
Formato: Tesis doctoral acceptedVersion
Lenguaje:Español
Publicado: 2015
Materias:
Acceso en línea:http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=posgraafa&cl=CL1&d=HWA_865
https://repositoriouba.sisbi.uba.ar/gsdl/collect/posgraafa/index/assoc/HWA_865.dir/865.PDF
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spelling I28-R145-HWA_8652024-10-23 Microsoft Word - TESIS CAYROL ARCHIVO FINAL The interaction of lymphoid tumor cells with components of the extracellular matrix via the integrin ?v?3 allows tumor survival and growth. This integrin was demonstrated to be the membrane receptor for thyroid hormones in several tissues. We found that thyroid hormones (THs), acting as soluble integrin ?v?3 ligands, activated growth-related signaling pathways in T-cell lymphomas (TCL). In this work we show that physiological concentrations of THs acting through the integrin ?V?3 induced angiogenesis and proliferation of immature and mature TLC cells. We characterized the transcriptional program triggered upon the activation of the integrin ?V?3 by TH, that is ultimately linked to a NF-?B dependent mechanism that lead to the induction of angiogenic and cell proliferation genes such as VEGF. Moreover, we found that pharmacological inhibition of integrin ?V?3 reduces the proliferation of T-cell lymphomas in pre-clinical models, including patient-derived xenografts of ALCL tumors. In sum, we here show that integrin ?V?3 transduces pro-survival signals into TCL nuclei, suggesting a novel mechanism for the endocrine modulation of TCL pathophysiology. Targeting this mechanism could constitute an effective and potentially low-toxicity chemotherapy-free treatment for TCL patients. Fil: Cayrol, María Florencia. Universidad de Buenos Aires. Facultad de Farmacia y Bioquìmica; Argentina Cerchietti, Leandro Cremaschi, Graciela Cayrol, María Florencia 2015-03-06 En este trabajo evaluamos el rol que ejercen las hormonas tiroideas (HTs) a través de su receptor nuclear y de membrana (TR y mTR), sobre líneas de distintos subtipos de linfomas de células T humanos (LCT). Particularmente, se evaluó la acción del mTR utilizando HTs unidas a agarosa (HT-AG, impermeables a la célula) y demostramos que en células T malignas este receptor de membrana es la integrina ?V?3. Se determinaron los programas transcripcionales activados por HTs a través del mTR, y se observó que esta acción induce la expresión de genes involucrados en proliferación celular y angiogénesis. Se desarrollaron modelos in vivo donde se evaluó el crecimiento tumoral de distintas líneas humanas de LCT en ratones inmunodeficientes NOD-SCID y se encontró que la inhibición de la integrina ?V?3 disminuye el crecimiento de los mismos. Más aún, se evaluó el efecto de un inhibidor del mTR en un modelo pre-clínico de linfoma sonde se transplantaron tumores derivados pacientes ALCL, y se observó una disminución significativa de los tumores tratados con el inhibidor. Estos resultados nos proporcionan un marco de conocimiento, para la inhibición selectiva de la integrina ?V?3 como posible estrategia terapéutica para los pacientes con linfomas de células T. application/pdf Targovnik, Héctor Pérez Leiros, Claudia Alonso, Daniel Linfoma T Hormonas tiroideas Proliferación Ciclo celular spa info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ Ciencia de la vida Doctora de Universidad de Buenos Aires en Inmunología Regulación por hormonas tiroideas de genes de señalización involucrados en vías de sobrevida y proliferación en células de linfoma T info:eu-repo/semantics/doctoralThesis info:ar-repo/semantics/tesis doctoral info:eu-repo/semantics/acceptedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=posgraafa&cl=CL1&d=HWA_865 https://repositoriouba.sisbi.uba.ar/gsdl/collect/posgraafa/index/assoc/HWA_865.dir/865.PDF
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
language Español
orig_language_str_mv spa
topic Linfoma T
Hormonas tiroideas
Proliferación
Ciclo celular
Ciencia de la vida
spellingShingle Linfoma T
Hormonas tiroideas
Proliferación
Ciclo celular
Ciencia de la vida
Cayrol, María Florencia
Microsoft Word - TESIS CAYROL ARCHIVO FINAL
topic_facet Linfoma T
Hormonas tiroideas
Proliferación
Ciclo celular
Ciencia de la vida
description The interaction of lymphoid tumor cells with components of the extracellular matrix via the integrin ?v?3 allows tumor survival and growth. This integrin was demonstrated to be the membrane receptor for thyroid hormones in several tissues. We found that thyroid hormones (THs), acting as soluble integrin ?v?3 ligands, activated growth-related signaling pathways in T-cell lymphomas (TCL). In this work we show that physiological concentrations of THs acting through the integrin ?V?3 induced angiogenesis and proliferation of immature and mature TLC cells. We characterized the transcriptional program triggered upon the activation of the integrin ?V?3 by TH, that is ultimately linked to a NF-?B dependent mechanism that lead to the induction of angiogenic and cell proliferation genes such as VEGF. Moreover, we found that pharmacological inhibition of integrin ?V?3 reduces the proliferation of T-cell lymphomas in pre-clinical models, including patient-derived xenografts of ALCL tumors. In sum, we here show that integrin ?V?3 transduces pro-survival signals into TCL nuclei, suggesting a novel mechanism for the endocrine modulation of TCL pathophysiology. Targeting this mechanism could constitute an effective and potentially low-toxicity chemotherapy-free treatment for TCL patients.
author2 Cerchietti, Leandro
author_facet Cerchietti, Leandro
Cayrol, María Florencia
format Tesis doctoral
Tesis doctoral
acceptedVersion
author Cayrol, María Florencia
author_sort Cayrol, María Florencia
title Microsoft Word - TESIS CAYROL ARCHIVO FINAL
title_short Microsoft Word - TESIS CAYROL ARCHIVO FINAL
title_full Microsoft Word - TESIS CAYROL ARCHIVO FINAL
title_fullStr Microsoft Word - TESIS CAYROL ARCHIVO FINAL
title_full_unstemmed Microsoft Word - TESIS CAYROL ARCHIVO FINAL
title_sort microsoft word - tesis cayrol archivo final
publishDate 2015
url http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=posgraafa&cl=CL1&d=HWA_865
https://repositoriouba.sisbi.uba.ar/gsdl/collect/posgraafa/index/assoc/HWA_865.dir/865.PDF
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