Notch activates cell cycle reentry and progression in quiescent cardiomyocytes

被引：147

作者：

Campa, Victor M. ^{[1
]}

Gutierrez-Lanza, Raquel ^{[1
]}

Cerignoli, Fabio ^{[1
]}

Diaz-Trelles, Ramon ^{[1
]}

Nelson, Brandon ^{[1
]}

Tsuji, Toshiya ^{[1
]}

Barcova, Maria ^{[1
]}

Jiang, Wei ^{[1
]}

Mercola, Mark ^{[1
]}

机构：

[1] Burnham Inst Med Res, La Jolla, CA 92037 USA

来源：

JOURNAL OF CELL BIOLOGY | 2008年 / 183卷 / 01期

关键词：

D O I：

10.1083/jcb.200806104

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

The inability of heart muscle to regenerate by replication of existing cardiomyocytes has engendered considerable interest in identifying developmental or other stimuli capable of sustaining the proliferative capacity of immature cardiomyocytes or stimulating division of postmitotic cardiomyocytes. Here, we demonstrate that reactivation of Notch signaling causes embryonic stem cell-derived and neonatal ventricular cardiomyocytes to enter the cell cycle. The proliferative response of neonatal ventricular cardiomyocytes declines as they mature, such that late activation of Notch triggers the DNA damage checkpoint and G2/M interphase arrest. Notch induces recombination signal-binding protein 1 for J kappa (RBP-J kappa)-dependent expression of cyclin D1 but, unlike other inducers, also shifts its subcellular distribution from the cytosol to the nucleus. Nuclear localization of cyclin D1 is independent of RBP-J kappa. Thus, the influence of Notch on nucleocytoplasmic localization of cyclin D1 is an unanticipated property of the Notch intracellular domain that is likely to regulate the cell cycle in multiple contexts, including tumorigenesis as well as cardiogenesis.

引用

页码：129 / 141

页数：13

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