Expression and significance of microRNAs in the p53 pathway in ovarian cancer cells and serous ovarian cancer tissues / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 885-890, 2011.
Artículo
en Chino
| WPRIM
| ID: wpr-335369
ABSTRACT
<p><b>OBJECTIVE</b>The aim of this study was to investigate whether miR-449a, miR-449b and miR-192 family microRNAs play the same roles in p53 pathway as miR-34 family in ovarian cancer.</p><p><b>METHODS</b>Wild-type p53 ovarian carcinoma cell line A2780 cells were treated with genotoxic agent adriamycin. The reactivation of p53 was detected by Western blot. The expression of miR-449a/b, miR-34a, miR-34b, miR-34c, miR-192 and miR-194 were detected by real-time quantitative PCR. Mutant p53 ovarian cancer cell line SKOV3.ipl cells were transfected with pre-microRNAs and the cell-cycle changes were detected. The expression level of miR-449a/b, miR-34a, miR-34b, miR-34c, miR-192 and miR-194 in serous ovarian carcinomas of varying grade and stage were compared with real-time PCR.</p><p><b>RESULTS</b>The expressions of miR-449a/b, miR-34b and miR-34c were 19-fold to 21-fold elevated after p53 activation by genotoxic agent. Ectopic expression of miR-449b, as well as miR-34c, resulted in cell-cycle arrest in SKOV3.ipl cells. The expression of miR-449a/b was parallel with that of miR-34b, miR-34c, and were significantly lower in late stage and high-grade serous carcinomas than in the normal fallopian tube, early stage and low-grade serous carcinomas. The expression of miR-192, miR-194 and miR-34a did not show evident features in serous ovarian carcinomas and were much lower than miR-449a/b, miR-34b and miR-34c in normal fallopian tube.</p><p><b>CONCLUSIONS</b>As tumor-suppressor microRNAs, miR-449a/b, miR-34b and miR-34c cooperate and play important roles in p53 pathway. Their inactivation may contribute to the carcinogenesis and progression of serous ovarian carcinomas.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Neoplasias Ováricas
/
Patología
/
Farmacología
/
Transfección
/
Transducción de Señal
/
Doxorrubicina
/
Ciclo Celular
/
Proteína p53 Supresora de Tumor
/
Cistadenocarcinoma Seroso
/
MicroARNs
Límite:
Adulto
/
Anciano
/
Femenino
/
Humanos
Idioma:
Chino
Revista:
Chinese Journal of Oncology
Año:
2011
Tipo del documento:
Artículo
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