...
首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Role of d-type cyclins in heart development and disease
【24h】

Role of d-type cyclins in heart development and disease

机译:d型细胞周期蛋白在心脏发育和疾病中的作用

获取原文
获取原文并翻译 | 示例
           

摘要

A defining feature of embryonic cardiomyocytes is their relatively high rates of proliferation. A gradual reduction in proliferative capacity throughout development culminates in permanent cell cycle exit by the vast majority of cardiomyo-cytes around the perinatal period. Accordingly, the adult heart has severely limited capacity for regeneration in response to injury or disease. The D-type cyclins (cyclin D1, D2, and D3) along with their catalytically active partners, the cyclin dependent kinases, are positive cell cycle regulators that play important roles in regulating proliferation of cardiomyocytes during normal heart development. While expression of D-type cyclins is generally low in the adult heart, expression levels are augmented in association with cardiac hypertrophy, but are uncoupled from myocyte cell division. Accordingly, re-activation of D-type cyclin expression in the adult heart has been implicated in pathophysiological processes via mechanisms distinct from those that drive proliferation during cardiac development. Growth factors and other exogenous agents regulate D-type cyclin production and activity in embryonic and adult cardiomyocytes. Understanding differences in the precise intracellular mediators downstream from these signaling molecules in embryonic versus adult cardiomyocytes could prove valuable for designing strategies to reactivate the cell cycle in cardiomyocytes in the setting of cardiovascular disease in the adult heart.
机译:胚胎心肌细胞的主要特征是其相对较高的增殖率。整个发育过程中增殖能力的逐渐降低最终导致围生期前后绝大多数心肌细胞永久退出细胞周期。因此,成年心脏响应损伤或疾病而具有严重受限的再生能力。 D型细胞周期蛋白(细胞周期蛋白D1,D2和D3)及其催化活性伙伴细胞周期蛋白依赖性激酶是积极的细胞周期调节剂,在正常心脏发育过程中在调节心肌细胞的增殖中起重要作用。虽然成年心脏中D型细胞周期蛋白的表达通常较低,但表达水平会随着心肌肥大而增加,但与心肌细胞分裂无关。因此,成年心脏中D型细胞周期蛋白表达的重新激活已经通过与心脏发育过程中驱动增殖的机制不同的机制参与了病理生理过程。生长因子和其他外源性因子调节胚胎和成年心肌细胞中D型细胞周期蛋白的产生和活性。理解胚胎和成人心肌细胞中这些信号分子下游精确细胞内介体的差异,对于设计在成人心脏心血管疾病中重新激活心肌细胞周期的策略可能具有重要意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号