Asymmetric centrosome behavior and the mechanisms of stem cell division.

Asymmetric centrosome behavior and the mechanisms of stem cell division.
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不对称的中心体行为和干细胞分裂的机制。

DOI:
10.1083/jcb.200707083
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发表时间:
2008-01-28
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Fuller MT
Fuller MT
中科院分区:
其他
文献类型:
--
作者:
Yamashita YM;Fuller MT

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分裂细胞产生具有不同命运的子细胞的能力是从细菌到真菌、植物和后生动物的重要发育机制。细胞分裂的不对称结果可以通过两种一般机制来指定:内在命运决定因素的不对称分离或子细胞进入微环境的不对称放置,这些微环境提供将细胞引导到不同状态的外部信号。对于这两种情况,纺锤体取向必须与内在决定因素或外在信号源的定位相协调,以实现适当的不对称结果。最近在果蝇雄性生殖系干细胞和成神经细胞中纺锤体取向的研究使人们更加关注差异中心体行为在发育程序性不对称分裂中的关键作用(综述见。Curr. 17:R465-R467。遗传学国家研究所8:462-472)。这些发现提供了新的见解,并提出了有趣的新模型,细胞如何协调纺锤体方向与细胞微环境,以调节和指导组织内的细胞命运决定。
The ability of dividing cells to produce daughters with different fates is an important developmental mechanism conserved from bacteria to fungi, plants, and metazoan animals. Asymmetric outcomes of a cell division can be specified by two general mechanisms: asymmetric segregation of intrinsic fate determinants or asymmetric placement of daughter cells into microenvironments that provide extrinsic signals that direct cells to different states. For both, spindle orientation must be coordinated with the localization of intrinsic determinants or source of extrinsic signals to achieve the proper asymmetric outcome. Recent work on spindle orientation in Drosophila melanogaster male germline stem cells and neuroblasts has brought into sharp focus the key role of differential centrosome behavior in developmentally programmed asymmetric division (for reviews see. Curr. Biol. 17:R465–R467. Nat. Rev. Genet. 8:462–472). These findings provide new insights and suggest intriguing new models for how cells coordinate spindle orientation with their cellular microenvironment to regulate and direct cell fate decisions within tissues.
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