Human Embryonic Stem Cells Do Not Change Their X Inactivation Status during Differentiation.
Human Embryonic Stem Cells Do Not Change Their X Inactivation Status during Differentiation.
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DOI:
10.1016/j.celrep.2016.11.054
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发表时间:
2017-01-03
期刊:
影响因子:
8.8
通讯作者:
Plath K
中科院分区:
文献类型:
--
作者:
Patel S;Bonora G;Sahakyan A;Kim R;Chronis C;Langerman J;Fitz-Gibbon S;Rubbi L;Skelton RJP;Ardehali R;Pellegrini M;Lowry WE;Clark AT;Plath K
Applications of ESCs require faithful chromatin changes during differentiation but the fate of each X-chromosome-state in differentiating ESCs is unclear. Female human ESC-lines either carry two active X-chromosomes (XaXa), an Xa and inactive-X-chromosome with or without XIST-RNA-coating (XiXIST+Xa;XiXa), or an Xa and an eroded-Xi (XeXa) where the Xi no longer expresses XIST-RNA and has partially reactivated. Here, we established XiXa, XeXa, and XaXa ESC-lines and followed their X-chromosome-state during differentiation. Surprisingly, we found that the X-state pre-existing in primed ESCs is maintained in differentiated cells. Consequently, differentiated XeXa and XaXa cells lacked XIST, did not initiate X-inactivation, and displayed higher X-linked gene-expression than XiXa cells. These results demonstrate that X-chromosome-dosage-compensation is not required for ESC differentiation. Our data imply that XiXIST+Xa ESCs are most suited for downstream applications and show that all other X-states are abnormal byproducts of our ESC-derivation and propagation methods.
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