Ki-67: more than a proliferation marker.

Ki-67: more than a proliferation marker.
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DOI:
10.1007/s00412-018-0659-8
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发表时间:
2018-06
期刊:
影响因子:
1.6
通讯作者:
Kaufman PD
Kaufman PD
中科院分区:
生物学3区
文献类型:
--
作者:
Sun X;Kaufman PD

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Ki-67蛋白作为人类肿瘤细胞的增殖标志物已经被广泛应用了几十年。在最近的研究中,这种大蛋白的多种分子功能已经得到了更好的理解。Ki-67在分裂间期和有丝分裂期细胞中都有作用,其细胞分布在细胞周期进程中发生显著变化。这些定位与不同的功能相关。例如,在间期,Ki-67是异染色质抗原的正常细胞分布和异染色质的核仁结合所必需的。在有丝分裂过程中,Ki-67是形成染色体周围层(PCL)所必需的,PCL是一种覆盖浓缩染色体的核糖核蛋白鞘。在这种结构中,Ki-67的作用是防止有丝分裂染色体的聚集。在这里,我们提出了一个概述Ki-67在整个细胞周期中的功能作用,并描述了最近的实验,阐明其在调节人类细胞的细胞周期进程中的作用。
Ki-67 protein has been widely used as a proliferation marker for human tumor cells for decades. In recent studies, multiple molecular functions of this large protein have become better understood. Ki-67 has roles in both interphase and mitotic cells, and its cellular distribution dramatically changes during cell cycle progression. These localizations correlate with distinct functions. For example, during interphase Ki-67 is required for normal cellular distribution of heterochromatin antigens and for the nucleolar association of heterochromatin. During mitosis, Ki-67 is essential for formation of the perichromosomal layer (PCL), a ribonucleoprotein sheath coating the condensed chromosomes. In this structure, Ki-67 acts to prevent aggregation of mitotic chromosomes. Here, we present an overview of functional roles of Ki-67 across the cell cycle and also describe recent experiments that clarify its role in regulating cell cycle progression in human cells.
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