Knockdown of nucleophosmin induces S-phase arrest in HepG2 cells / 癌症
Chinese Journal of Cancer
;
(12): 853-860, 2011.
Artigo
em Inglês
| WPRIM
| ID: wpr-294450
ABSTRACT
Nucleophosmin/B23 (NPM) is a universally expressed nucleolar phosphoprotein that participates in proliferation, apoptosis, ribosome assembly, and centrosome duplication; however, the role of NPM in cell cycle regulation is not well characterized. We investigated the mechanism by which NPM is involved in cell cycle regulation. NPM was knocked down using siRNA in HepG2 hepatoblastoma cells. NPM translocation following actinomycin D (ActD) treatment was investigated using immunofluorescent staining. Expression of NPM and other factors involved in cell cycle regulation was examined by Western blotting. Cell cycle distribution was measured using flow cytometry to detect 5-ethynyl-2'-deoxyuridine (EdU) incorporation. Cell proliferation was quantified by the MTT assay. Knockdown of NPM increased the percentage of HepG2 cells in S phase and led to decreased expression of P53 and P21Cip1/WAF1. S-phase arrest in HepG2 cells was significantly enhanced by ActD treatment. Furthermore, knockdown of NPM abrogated ActD-induced G2/M phase cell cycle arrest. Taken together, these data demonstrate that inhibition of NPM has a significant effect on the cell cycle.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Farmacologia
/
Proteínas Nucleares
/
Ciclo Celular
/
Proteína Supressora de Tumor p53
/
Fase S
/
Dactinomicina
/
RNA Interferente Pequeno
/
Proliferação de Células
/
Inibidor de Quinase Dependente de Ciclina p21
/
Técnicas de Silenciamento de Genes
Limite:
Humanos
Idioma:
Inglês
Revista:
Chinese Journal of Cancer
Ano de publicação:
2011
Tipo de documento:
Artigo
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