Delayed activation of the DNA replication licensing system in Lgr5(+) intestinal stem cells
Delayed activation of the DNA replication licensing system in Lgr5(+) intestinal stem cells
复制标题
Lgr5( )肠道干细胞中DNA复制许可系统的延迟激活
DOI:
10.1101/177477
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Carroll T
中科院分区:
文献类型:
--
作者:
Carroll T
During late mitosis and early G1, replication origins are licensed for replication by binding to MCM2-7 double hexamers. This signals proliferative fate commitment. Here, we investigate how licensing and proliferative commitment are coupled in the small-intestinal epithelium. We developed a method for identifying cells in intestinal crypts that contain DNA-bound MCM2-7 and are licensed for replication. Interphase cells at the top of the transit amplifying zone did not contain DNA-bound MCM2-7, but still expressed MCM2-7 protein. This suggests licensing is inhibited immediately at terminal differentiation, after a final mitosis. Strikingly, we found that at the crypt base the majority of Lgr5(+) intestinal stem cells reside in an unlicensed state, despite expressing MCM2-7 protein and the Ki67 proliferation marker. This state, which we call ‘shallow-G0’, might allow stem cells to be easily activated to re-enter the cell cycle. We demonstrate that the dynamics of the licensing system provides a novel means to assess the unique cell-cycle of intestinal epithelial cells.
登录
查看更多内容
影响因子:
4
作者:
D. Dimitrova;T. Prokhorova;J. Blow;I. Todorov;D. Gilbert
通讯作者:
D. Dimitrova;T. Prokhorova;J. Blow;I. Todorov;D. Gilbert
影响因子:
19
作者:
Dalton S
通讯作者:
Dalton S
影响因子:
16
作者:
Ilves I;Petojevic T;Pesavento JJ;Botchan MR
通讯作者:
Botchan MR
DOI:
--
发表时间:
1987
期刊:
International Journal of Radiation Biology and Related Studies in Physics Chemistry and Medicine
影响因子:
--
作者:
S. Chwalinski;C. Potten
通讯作者:
C. Potten
DOI:
--
发表时间:
1998
期刊:
Laboratory investigation; a journal of technical methods and pathology
影响因子:
--
作者:
I. Todorov;B. Werness;H.;L. Buddharaju;P. D. Todorova;H. Slocum;John S. J. Brooks;J. Huberman
通讯作者:
J. Huberman