Title |
Maternal topoisomerase II alpha, not topoisomerase II beta, enables embryonic development of zebrafish top2a-/- mutants
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Published in |
BMC Developmental Biology, November 2011
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DOI | 10.1186/1471-213x-11-71 |
Pubmed ID | |
Authors |
Beata Sapetto-Rebow, Sarah C McLoughlin, Lynne C O'Shea, Olivia O'Leary, Jason R Willer, Yolanda Alvarez, Ross Collery, Jacintha O'Sullivan, Freek Van Eeden, Carmel Hensey, Breandán N Kennedy |
Abstract |
Genetic alterations in human topoisomerase II alpha (TOP2A) are linked to cancer susceptibility. TOP2A decatenates chromosomes and thus is necessary for multiple aspects of cell division including DNA replication, chromosome condensation and segregation. Topoisomerase II alpha is also required for embryonic development in mammals, as mouse Top2a knockouts result in embryonic lethality as early as the 4-8 cell stage. The purpose of this study was to determine whether the extended developmental capability of zebrafish top2a mutants arises from maternal expression of top2a or compensation from its top2b paralogue. |
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