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SOX7 Is Required for Muscle Satellite Cell Development and Maintenance
Satellite cells are skeletal-muscle-specific stem cells that are activated by injury to proliferate, differentiate, and fuse to enable repair. SOX7, a member of the SRY-related HMG-box family of transcription factors is expressed in quiescent satellite cells. To elucidate SOX7 function in skeletal m...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5639291/ https://www.ncbi.nlm.nih.gov/pubmed/28943254 http://dx.doi.org/10.1016/j.stemcr.2017.08.014 |
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author | Rajgara, Rashida F. Lala-Tabbert, Neena Marchildon, François Lamarche, Émilie MacDonald, Jennifer K. Scott, Daryl A. Blais, Alexandre Skerjanc, Ilona S. Wiper-Bergeron, Nadine |
author_facet | Rajgara, Rashida F. Lala-Tabbert, Neena Marchildon, François Lamarche, Émilie MacDonald, Jennifer K. Scott, Daryl A. Blais, Alexandre Skerjanc, Ilona S. Wiper-Bergeron, Nadine |
author_sort | Rajgara, Rashida F. |
collection | PubMed |
description | Satellite cells are skeletal-muscle-specific stem cells that are activated by injury to proliferate, differentiate, and fuse to enable repair. SOX7, a member of the SRY-related HMG-box family of transcription factors is expressed in quiescent satellite cells. To elucidate SOX7 function in skeletal muscle, we knocked down Sox7 expression in embryonic stem cells and primary myoblasts and generated a conditional knockout mouse in which Sox7 is excised in PAX3(+) cells. Loss of Sox7 in embryonic stem cells reduced Pax3 and Pax7 expression. In vivo, conditional knockdown of Sox7 reduced the satellite cell population from birth, reduced myofiber caliber, and impaired regeneration after acute injury. Although Sox7-deficient primary myoblasts differentiated normally, impaired myoblast fusion and increased sensitivity to apoptosis in culture and in vivo were observed. Taken together, these results indicate that SOX7 is dispensable for myogenesis but is necessary to promote satellite cell development and survival. |
format | Online Article Text |
id | pubmed-5639291 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-56392912017-10-20 SOX7 Is Required for Muscle Satellite Cell Development and Maintenance Rajgara, Rashida F. Lala-Tabbert, Neena Marchildon, François Lamarche, Émilie MacDonald, Jennifer K. Scott, Daryl A. Blais, Alexandre Skerjanc, Ilona S. Wiper-Bergeron, Nadine Stem Cell Reports Article Satellite cells are skeletal-muscle-specific stem cells that are activated by injury to proliferate, differentiate, and fuse to enable repair. SOX7, a member of the SRY-related HMG-box family of transcription factors is expressed in quiescent satellite cells. To elucidate SOX7 function in skeletal muscle, we knocked down Sox7 expression in embryonic stem cells and primary myoblasts and generated a conditional knockout mouse in which Sox7 is excised in PAX3(+) cells. Loss of Sox7 in embryonic stem cells reduced Pax3 and Pax7 expression. In vivo, conditional knockdown of Sox7 reduced the satellite cell population from birth, reduced myofiber caliber, and impaired regeneration after acute injury. Although Sox7-deficient primary myoblasts differentiated normally, impaired myoblast fusion and increased sensitivity to apoptosis in culture and in vivo were observed. Taken together, these results indicate that SOX7 is dispensable for myogenesis but is necessary to promote satellite cell development and survival. Elsevier 2017-09-21 /pmc/articles/PMC5639291/ /pubmed/28943254 http://dx.doi.org/10.1016/j.stemcr.2017.08.014 Text en © 2017 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Rajgara, Rashida F. Lala-Tabbert, Neena Marchildon, François Lamarche, Émilie MacDonald, Jennifer K. Scott, Daryl A. Blais, Alexandre Skerjanc, Ilona S. Wiper-Bergeron, Nadine SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title | SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title_full | SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title_fullStr | SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title_full_unstemmed | SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title_short | SOX7 Is Required for Muscle Satellite Cell Development and Maintenance |
title_sort | sox7 is required for muscle satellite cell development and maintenance |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5639291/ https://www.ncbi.nlm.nih.gov/pubmed/28943254 http://dx.doi.org/10.1016/j.stemcr.2017.08.014 |
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