MiR-222 targeted PUMA to improve sensitization of UM1 cells to cisplatin.
Int J Mol Sci
; 15(12): 22128-41, 2014 Dec 02.
Article
en En
| MEDLINE
| ID: mdl-25474084
ABSTRACT
microRNAs have been shown to play critical roles in regulating the chemosensitivity of cancer cells. As a member of the oncogenic miRNAs (oncomiRs), miR-222 has been reported to drive the oncogenesis of many types of malignancies. However, little is known concerning the specific role of miR-222 in human oral squamous cell carcinoma (OSCC). The present study explored the role and mechanism of miR-222 in increasing the expression of p53 up-regulated modulator of apoptosis (PUMA) and enhancing the sensitivity of OSCC to cisplatin (CDDP). Results showed that antisense (As)-miR-222 inhibits the expression of miR-222. In contrast, PUMA was dramaticallyup-regulated. IC50 values were significantly decreased in cells treated with As-miR-222 combined with CDDP, to a greater extent than in cells treated with CDDP alone. Furthermore, As-miR-222 enhanced apoptosis and inhibited the invasiveness of UM1 cells. Analysis of the above data suggested that, in UM1 cells, there might be a regulatory loop between miR-222 and PUMA, and that miR-222 inhibition increased the chemosensitivity to CDDP. These findings demonstrated that down-regulation of miR-222 could enhance the chemosensitivity of human OSCC cells to CDDP, and that the combination of As-miR-222 and CDDP could be an effective therapeutic strategy by boosting the expression of PUMA for controlling the growth of OSCC.
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1
Banco de datos:
MEDLINE
Asunto principal:
Neoplasias de la Boca
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Carcinoma de Células Escamosas
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Proteínas Proto-Oncogénicas
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Cisplatino
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MicroARNs
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Proteínas Reguladoras de la Apoptosis
Límite:
Humans
Idioma:
En
Año:
2014
Tipo del documento:
Article