| First Author | Ogawa S | Year | 2019 |
| Journal | Stem Cell Reports | Volume | 12 |
| Issue | 6 | Pages | 1366-1379 |
| PubMed ID | 31155506 | Mgi Jnum | J:289891 |
| Mgi Id | MGI:6435083 | Doi | 10.1016/j.stemcr.2019.05.002 |
| Citation | Ogawa S, et al. (2019) Zscan5b Deficiency Impairs DNA Damage Response and Causes Chromosomal Aberrations during Mitosis. Stem Cell Reports 12(6):1366-1379 |
| abstractText | Zygotic genome activation (ZGA) begins after fertilization and is essential for establishing pluripotency and genome stability. However, it is unclear how ZGA genes prevent mitotic errors. Here we show that knockout of the ZGA gene Zscan5b, which encodes a SCAN domain with C2H2 zinc fingers, causes a high incidence of chromosomal abnormalities in embryonic stem cells (ESCs), and leads to the development of early-stage cancers. After irradiation, Zscan5b-deficient ESCs displayed significantly increased levels of gamma-H2AX despite increased expression of the DNA repair genes Rad51l3 and Bard. Re-expression of Zscan5b reduced gamma-H2AX content, implying a role for Zscan5b in DNA damage repair processes. A co-immunoprecipitation analysis showed that Zscan5b bound to the linker histone H1, suggesting that Zscan5b may protect chromosomal architecture. Our report demonstrates that the ZGA gene Zscan5b is involved in genomic integrity and acts to promote DNA damage repair and regulate chromatin dynamics during mitosis. |
