Investigating senescence in cellular plasticity and tissue regeneration

Cellular senescence has mainly been associated with tumor suppression and aging, mediated through cell intrinsic cell-cycle inhibition and arrest. However, through secretion of specific proteins, termed the senescence-associated secretory phenotype (SASP), senescent cells can have paradoxical effect...

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Autor: Ritschka, Birgit
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:CBUC, CESCA
Repositorio:TDR. Tesis Doctorales en Red
OAI Identifier:oai:www.tdx.cat:10803/481989
Acceso en línea:http://hdl.handle.net/10803/481989
Access Level:acceso abierto
Palabra clave:Senescence
Plasticity
Stem cells
Papilloma
SASP
Senescencia
Plasticidad celular
Célula madre
Papiloma
576
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oai_identifier_str oai:www.tdx.cat:10803/481989
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Investigating senescence in cellular plasticity and tissue regeneration
title Investigating senescence in cellular plasticity and tissue regeneration
spellingShingle Investigating senescence in cellular plasticity and tissue regeneration
Ritschka, Birgit
Senescence
Plasticity
Stem cells
Papilloma
SASP
Senescencia
Plasticidad celular
Célula madre
Papiloma
576
title_short Investigating senescence in cellular plasticity and tissue regeneration
title_full Investigating senescence in cellular plasticity and tissue regeneration
title_fullStr Investigating senescence in cellular plasticity and tissue regeneration
title_full_unstemmed Investigating senescence in cellular plasticity and tissue regeneration
title_sort Investigating senescence in cellular plasticity and tissue regeneration
dc.creator.none.fl_str_mv Ritschka, Birgit
author Ritschka, Birgit
author_facet Ritschka, Birgit
author_role author
dc.contributor.none.fl_str_mv Keyes, William M.
Universitat Pompeu Fabra. Departament de Ciències Experimentals i de la Salut
dc.subject.none.fl_str_mv Senescence
Plasticity
Stem cells
Papilloma
SASP
Senescencia
Plasticidad celular
Célula madre
Papiloma
576
topic Senescence
Plasticity
Stem cells
Papilloma
SASP
Senescencia
Plasticidad celular
Célula madre
Papiloma
576
description Cellular senescence has mainly been associated with tumor suppression and aging, mediated through cell intrinsic cell-cycle inhibition and arrest. However, through secretion of specific proteins, termed the senescence-associated secretory phenotype (SASP), senescent cells can have paradoxical effects, promoting proliferation, invasion or paracrine senescence in neighbouring cells. Additionally, emerging studies showed that cellular senescence is also implicated in complex biological processes such as embryonic development, tissue repair and wound healing. Unexpectedly, we found that primary mouse keratinocytes undergoing oncogene-induced senescence exhibit an increase in stem cell gene expression. Interestingly, this signature can also be induced in normal cells upon transient exposure to the SASP. However, prolonged exposure to the SASP leads to paracrine senescence in vitro as a possible mechanism to counteract the aberrant regenerative stimulation. Together this work suggests that the SASP is a regenerative mechanism that instructs stemness and plasticity, but if left unperturbed can have detrimental effects seen during aging and tumor formation.
publishDate 2017
dc.date.none.fl_str_mv 2017
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10803/481989
url http://hdl.handle.net/10803/481989
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 137 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universitat Pompeu Fabra
publisher.none.fl_str_mv Universitat Pompeu Fabra
dc.source.none.fl_str_mv TDX (Tesis Doctorals en Xarxa)
reponame:TDR. Tesis Doctorales en Red
instname:CBUC, CESCA
instname_str CBUC, CESCA
reponame_str TDR. Tesis Doctorales en Red
collection TDR. Tesis Doctorales en Red
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869422477494452224
spelling Investigating senescence in cellular plasticity and tissue regenerationRitschka, BirgitSenescencePlasticityStem cellsPapillomaSASPSenescenciaPlasticidad celularCélula madrePapiloma576Cellular senescence has mainly been associated with tumor suppression and aging, mediated through cell intrinsic cell-cycle inhibition and arrest. However, through secretion of specific proteins, termed the senescence-associated secretory phenotype (SASP), senescent cells can have paradoxical effects, promoting proliferation, invasion or paracrine senescence in neighbouring cells. Additionally, emerging studies showed that cellular senescence is also implicated in complex biological processes such as embryonic development, tissue repair and wound healing. Unexpectedly, we found that primary mouse keratinocytes undergoing oncogene-induced senescence exhibit an increase in stem cell gene expression. Interestingly, this signature can also be induced in normal cells upon transient exposure to the SASP. However, prolonged exposure to the SASP leads to paracrine senescence in vitro as a possible mechanism to counteract the aberrant regenerative stimulation. Together this work suggests that the SASP is a regenerative mechanism that instructs stemness and plasticity, but if left unperturbed can have detrimental effects seen during aging and tumor formation.La senescencia celular ha sido generalmente asociada a la supresión de tumores y al envejecimiento mediante mecanismos intrínsecos de inhibición del ciclo celular y arresto proliferativo. Sin embargo, mediante la secreción de proteínas específicas llamadas SASP, las células senescentes pueden tener efectos paradójicos, promoviendo la proliferación, la invasión o la senescencia en células circundantes de forma paracrina. Además, estudios recientes han demostrado que la senescencia celular está implicada también en otros procesos biológicos como el desarrollo embrionario, la reparación de tejidos y la cicatrización de heridas. Inesperadamente, encontramos que los queratinocitos primarios de ratón a los que se les induce senescencia mediante sobreexpresión de un oncogén, experimentan un incremento en la expresión de genes de células madre. Cabe notar que esta signatura también aparece en células normales expuestas al SASP. No obstante, una exposición prolongada al SASP in vitro induce senescencia de forma paracrina posiblemente como mecanismo para contrarrestar el exceso de estimulación regenerativa. En conjunto este trabajo sugiere que el SASP es un mecanismo regenerativo que induce propiedades de células madre y plasticidad, pero si persiste puede tener efectos perjudiciales promoviendo el envejecimiento y la formación de tumores.Programa de doctorat en BiomedicinaUniversitat Pompeu FabraKeyes, William M.Universitat Pompeu Fabra. Departament de Ciències Experimentals i de la Salut201820182017info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion137 p.application/pdfapplication/pdfhttp://hdl.handle.net/10803/481989TDX (Tesis Doctorals en Xarxa)reponame:TDR. Tesis Doctorales en Redinstname:CBUC, CESCAInglésADVERTIMENT. L'accés als continguts d'aquesta tesi doctoral i la seva utilització ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, així com en activitats o materials d'investigació i docència en els termes establerts a l'art. 32 del Text Refós de la Llei de Propietat Intel·lectual (RDL 1/1996). Per altres utilitzacions es requereix l'autorització prèvia i expressa de la persona autora. En qualsevol cas, en la utilització dels seus continguts caldrà indicar de forma clara el nom i cognoms de la persona autora i el títol de la tesi doctoral. No s'autoritza la seva reproducció o altres formes d'explotació efectuades amb finalitats de lucre ni la seva comunicació pública des d'un lloc aliè al servei TDX. Tampoc s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i índexs.info:eu-repo/semantics/openAccessoai:www.tdx.cat:10803/4819892026-06-14T12:46:07Z
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