A Screen for novel factors involved in pluripotency and X-chromosome reactivation
X-Chromosome Reactivation (XCR) occurs in the epiblast cells of the blastocyst and in germ cells, thereby coupling XCR with pluripotency. We performed a screen in iPS cells by knocking down the expression of candidate genes picked from a single cell microarray expression profile in blastocysts. We t...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/666581 |
| Acceso en línea: | http://hdl.handle.net/10803/666581 |
| Access Level: | acceso abierto |
| Palabra clave: | Screen Pluripotency Cell reprogramming X-Reactivation X-Chromosome structure Cribaje Pluripotencia Reprogramación celular Reactivación del X Estructura del cromosoma X 577 |
| Sumario: | X-Chromosome Reactivation (XCR) occurs in the epiblast cells of the blastocyst and in germ cells, thereby coupling XCR with pluripotency. We performed a screen in iPS cells by knocking down the expression of candidate genes picked from a single cell microarray expression profile in blastocysts. We thereby identified candidates which had an effect on both pluripotency and X-Reactivation. However, we also identified factors with a specific role in XCR. This suggests that XCR is not an absolute requirement for iPSC reprogramming and that the two processes can be uncoupled. Among these factors, there was the cohesin complex member Smc1a. In experiments based on Super resolution microscopy (STORM), we observed a preferential enrichment of Smc1a on the active compared to inactive X, suggesting a role in shaping the Xa structure. Therefore, we conclude that cohesin-mediated changes in X-chromosome structure are a key step during the XCR process. |
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