期刊
FEBS LETTERS
卷 582, 期 27, 页码 3839-3844出版社
WILEY
DOI: 10.1016/j.febslet.2008.10.023
关键词
HeLa cell; RNAi; siRNA; Nucleophosmin; Mitosis
资金
- Ministry of Education, Culture Sports, Sciences and Technology of the Japanese Government
- Japan Science and Technology Agency
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.
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