Mechanisms of G2/M cycle arrest induced by topo IIalpha and II beta inhibitors in H460 cells / 南方医科大学学报
Journal of Southern Medical University
;
(12): 2187-2190, 2008.
Artigo
em Chinês
| WPRIM
| ID: wpr-321733
ABSTRACT
<p><b>OBJECTIVE</b>To compare the mechanisms of G(2)/M cycle arrest induced by topo IIalpha and IIbeta inhibitors in H460 cells.</p><p><b>METHODS</b>The inhibitory effects of XK469, adriamycin and etoposide on H460 cell growth were analyzed by MTT assay. The changes in cell cycle and expressions of cdc2, phos-cdc2 and 14-3-3sigma proteins induced by these 3 topo II inhibitors were detected by flow cytometry and Western blotting, respectively.</p><p><b>RESULTS</b>Both of the two types of topo II inhibitor resulted in dose-dependent G(2)/M phase arrest and growth inhibition of H460 cells, but XK469 failed to induce 14-3-3sigma protein expression as adriamycin and etoposide did.</p><p><b>CONCLUSION</b>Topo IIalpha and topo IIbeta inhibitors induce growth inhibition of H460 cells possibly through two different mechanisms, namely the 14-3-3sigma-dependent pathway and the 14-3-3sigma-independent pathway, but further functional inhibition test of 14-3-3sigma is needed to confirm this hypothesis.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Farmacologia
/
Fisiologia
/
Quinoxalinas
/
Ciclo Celular
/
Divisão Celular
/
Fase G2
/
Carcinoma Pulmonar de Células não Pequenas
/
DNA Topoisomerases Tipo II
/
Linhagem Celular Tumoral
Limite:
Humanos
Idioma:
Chinês
Revista:
Journal of Southern Medical University
Ano de publicação:
2008
Tipo de documento:
Artigo
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