Nucleophosmin is required for chromosome congression, proper mitotic spindle formation, and kinetochore-microtubule attachment in HeLa cells

被引：37

作者：

Amin, Mohammed Abdullahel ^{[1
]}

Matsunaga, Sachihiro ^{[1
]}

Uchiyama, Susumu ^{[1
]}

Fukui, Kiichi ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Biotechnol, Suita, Osaka 5650871, Japan

来源：

FEBS LETTERS | 2008年 / 582卷 / 27期

基金：

日本科学技术振兴机构;

关键词：

HeLa cell; RNAi; siRNA; Nucleophosmin; Mitosis;

D O I：

10.1016/j.febslet.2008.10.023

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Nucleophosmin (NPM) is an abundantly expressed multifunctional nucleolar phosphoprotein. Here we show that depletion of NPM by RNA interference causes defects in cell division, followed by an arrest of DNA synthesis due to activation of a p53-dependent checkpoint response in HeLa cells. Depletion of NPM leads to mitotic arrest due to spindle checkpoint activation. The mitotic cells arrested by NPM depletion have defects in chromosome congression, proper mitotic spindle and centrosome formation, as well as defects in kinetochoremicrotubule attachments. Loss of NPM thus causes severe mitotic defects and delayed mitotic progression. These findings indicate that NPM is essential for mitotic progression and cell proliferation. (C) 2008 Published by Elsevier B. V. on behalf of the Federation of European Biochemical Societies.

引用

页码：3839 / 3844

页数：6