Effect of MLL-AF9 fusion gene silence of acute monocytic leukemia cell line THP-1 on cyclin-dependent kinase inhibitor p27 expression / 中华血液学杂志
Chinese Journal of Hematology
;
(12): 375-378, 2008.
Artículo
en Chino
| WPRIM
| ID: wpr-240010
ABSTRACT
<p><b>OBJECTIVE</b>To explore the effect of MLL-AF9 fusion gene silence on p27 expression and transcription regulation in THP-1 cells.</p><p><b>METHODS</b>Small interference RNA (siRNA) fragments targeting THP-1 cells specific MLL-AF9 fusion gene were designed and constructed, and transfected into THP-1 by lipofectamine. Flow cytometry was used to detect siRNA transfection efficiency. The level of MLL-AF9 mRNA expression was examined by RT-PCR and the expression of MLL-AF9 and p27 protein was detected by Western blot. Chromatin immunoprecipitation (ChIP) assay was used to confirm whether MLL-AF9 binds to the p27 promoter in THP-1 cell.</p><p><b>RESULTS</b>SiRNA transfection efficiency was (69.1 +/- 1.8)%. The level of p27 expression was up-regulated at both mRNA [(0.84 +/- 0.12) vs (0.35 +/- 0.03) of control group] and protein levels after MLL-AF9 expression was significantly inhibited in siRNA-transfected cells (0.31 +/- 0.07) compared with that in the controls (1.25 +/- 0.13) (P<0.01). MLL-AF9 fusion protein bond to DNA fragment of p27 gene promoter region in THP-1 cell.</p><p><b>CONCLUSION</b>MLL-AF9 fusion gene silence up-regulates p27 gene expression, and the mechanism maybe the recovery of p27 gene expression due to MLL-AF9 fusion protein binding to p27 promoter.</p>
Texto completo:
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Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Patología
/
Transfección
/
Proteínas de Fusión Oncogénica
/
Leucemia Monocítica Aguda
/
Interferencia de ARN
/
Línea Celular Tumoral
/
Inhibidor p27 de las Quinasas Dependientes de la Ciclina
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Proteína de la Leucemia Mieloide-Linfoide
/
Fusión Génica
/
Genética
Límite:
Humanos
Idioma:
Chino
Revista:
Chinese Journal of Hematology
Año:
2008
Tipo del documento:
Artículo
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