miR-1470 mediates lapatinib induced p27 upregulation by targeting c-jun.
J Cell Physiol
; 230(7): 1630-9, 2015 Jul.
Article
em En
| MEDLINE
| ID: mdl-25545366
ABSTRACT
Our previous study indicated that lapatinib induces p27-dependent G(1) arrest through both transcriptional and post-translational mechanisms. Using miRNA microarray technology and quantitative RT-PCR, we further investigated the potential miRNAs that involved in p27 upregulation and Her-2 signaling pathway alteration with lapatinib treatment. A subset of 7 miRNAs was significantly affected in both 0.5 µM and 2.0 µM and 24 h and 48 h lapatinib treatment. Among them, only miR-1470, miR-126, and miR-1208 were identified in the Her-2 pathway after KEGG pathway analysis. However, luciferase reporter assay confirmed that miR-1470 directly recognized the 3'-untranslated region of c-jun transcripts, which was consistent with TargetScan analysis. miR-1470 significantly decreased c-jun expression, thus miR-1470 may repressc-jun activation of cyclinD1 expression, and consequently promoted the upregulation of p27, a key molecule in the cell cycle arrest. Taken together, the present study provided the first evidences that miR-1470 mediated lapatinib induced p27 upregulation by targeting c-jun.
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Base de dados:
MEDLINE
Assunto principal:
Quinazolinas
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Regulação Neoplásica da Expressão Gênica
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Antígeno Nuclear de Célula em Proliferação
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MicroRNAs
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Proteínas Quinases JNK Ativadas por Mitógeno
Limite:
Female
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Humans
Idioma:
En
Revista:
J Cell Physiol
Ano de publicação:
2015
Tipo de documento:
Article