B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells.
The transcription factor B-Myb is present in all proliferating cells, and in mice engineered to remove this gene, embryos die in utero just after implantation due to inner cell mass defects. This lethal phenotype has generally been attributed to a proliferation defect in the cell cycle phase of G1.I...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2008-06-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC2423619?pdf=render |
| _version_ | 1818839940275896320 |
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| author | Kirill V Tarasov Yelena S Tarasova Wai Leong Tam Daniel R Riordon Steven T Elliott Gabriela Kania Jinliang Li Satoshi Yamanaka David G Crider Gianluca Testa Ronald A Li Bing Lim Colin L Stewart Yie Liu Jennifer E Van Eyk Robert P Wersto Anna M Wobus Kenneth R Boheler |
| author_facet | Kirill V Tarasov Yelena S Tarasova Wai Leong Tam Daniel R Riordon Steven T Elliott Gabriela Kania Jinliang Li Satoshi Yamanaka David G Crider Gianluca Testa Ronald A Li Bing Lim Colin L Stewart Yie Liu Jennifer E Van Eyk Robert P Wersto Anna M Wobus Kenneth R Boheler |
| author_sort | Kirill V Tarasov |
| collection | DOAJ |
| description | The transcription factor B-Myb is present in all proliferating cells, and in mice engineered to remove this gene, embryos die in utero just after implantation due to inner cell mass defects. This lethal phenotype has generally been attributed to a proliferation defect in the cell cycle phase of G1.In the present study, we show that the major cell cycle defect in murine embryonic stem (mES) cells occurs in G2/M. Specifically, knockdown of B-Myb by short-hairpin RNAs results in delayed transit through G2/M, severe mitotic spindle and centrosome defects, and in polyploidy. Moreover, many euploid mES cells that are transiently deficient in B-Myb become aneuploid and can no longer be considered viable. Knockdown of B-Myb in mES cells also decreases Oct4 RNA and protein abundance, while over-expression of B-MYB modestly up-regulates pou5f1 gene expression. The coordinated changes in B-Myb and Oct4 expression are due, at least partly, to the ability of B-Myb to directly modulate pou5f1 gene promoter activity in vitro. Ultimately, the loss of B-Myb and associated loss of Oct4 lead to an increase in early markers of differentiation prior to the activation of caspase-mediated programmed cell death.Appropriate B-Myb expression is critical to the maintenance of chromosomally stable and pluripotent ES cells, but its absence promotes chromosomal instability that results in either aneuploidy or differentiation-associated cell death. |
| first_indexed | 2024-12-19T04:02:16Z |
| format | Article |
| id | doaj.art-6aa27e5a8cf6435099a228ed5fdb8023 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-19T04:02:16Z |
| publishDate | 2008-06-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-6aa27e5a8cf6435099a228ed5fdb80232022-12-21T20:36:38ZengPublic Library of Science (PLoS)PLoS ONE1932-62032008-06-0136e247810.1371/journal.pone.0002478B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells.Kirill V TarasovYelena S TarasovaWai Leong TamDaniel R RiordonSteven T ElliottGabriela KaniaJinliang LiSatoshi YamanakaDavid G CriderGianluca TestaRonald A LiBing LimColin L StewartYie LiuJennifer E Van EykRobert P WerstoAnna M WobusKenneth R BohelerThe transcription factor B-Myb is present in all proliferating cells, and in mice engineered to remove this gene, embryos die in utero just after implantation due to inner cell mass defects. This lethal phenotype has generally been attributed to a proliferation defect in the cell cycle phase of G1.In the present study, we show that the major cell cycle defect in murine embryonic stem (mES) cells occurs in G2/M. Specifically, knockdown of B-Myb by short-hairpin RNAs results in delayed transit through G2/M, severe mitotic spindle and centrosome defects, and in polyploidy. Moreover, many euploid mES cells that are transiently deficient in B-Myb become aneuploid and can no longer be considered viable. Knockdown of B-Myb in mES cells also decreases Oct4 RNA and protein abundance, while over-expression of B-MYB modestly up-regulates pou5f1 gene expression. The coordinated changes in B-Myb and Oct4 expression are due, at least partly, to the ability of B-Myb to directly modulate pou5f1 gene promoter activity in vitro. Ultimately, the loss of B-Myb and associated loss of Oct4 lead to an increase in early markers of differentiation prior to the activation of caspase-mediated programmed cell death.Appropriate B-Myb expression is critical to the maintenance of chromosomally stable and pluripotent ES cells, but its absence promotes chromosomal instability that results in either aneuploidy or differentiation-associated cell death.http://europepmc.org/articles/PMC2423619?pdf=render |
| spellingShingle | Kirill V Tarasov Yelena S Tarasova Wai Leong Tam Daniel R Riordon Steven T Elliott Gabriela Kania Jinliang Li Satoshi Yamanaka David G Crider Gianluca Testa Ronald A Li Bing Lim Colin L Stewart Yie Liu Jennifer E Van Eyk Robert P Wersto Anna M Wobus Kenneth R Boheler B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. PLoS ONE |
| title | B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. |
| title_full | B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. |
| title_fullStr | B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. |
| title_full_unstemmed | B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. |
| title_short | B-MYB is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells. |
| title_sort | b myb is essential for normal cell cycle progression and chromosomal stability of embryonic stem cells |
| url | http://europepmc.org/articles/PMC2423619?pdf=render |
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