RRC ID 43987
Author Dong P, Karaayvaz M, Jia N, Kaneuchi M, Hamada J, Watari H, Sudo S, Ju J, Sakuragi N.
Title Mutant p53 gain-of-function induces epithelial-mesenchymal transition through modulation of the miR-130b-ZEB1 axis.
Journal Oncogene
Abstract The tumor suppressor gene p53 has been implicated in the regulation of epithelial-mesenchymal transition (EMT) and tumor metastasis by regulating microRNA (miRNA) expression. Here, we report that mutant p53 exerts oncogenic functions and promotes EMT in endometrial cancer (EC) by directly binding to the promoter of miR-130b (a negative regulator of ZEB1) and inhibiting its transcription. We transduced p53 mutants into p53-null EC cells, profiled the miRNA expression by miRNA microarray and identified miR-130b as a potential target of mutant p53. Ectopic expression of p53 mutants repressed the expression of miR-130b and triggered ZEB1-dependent EMT and cancer cell invasion. Loss of an endogenous p53 mutation increased the expression of miR-130b, which resulted in reduced ZEB1 expression and attenuation of the EMT phenotype. Furthermore, re-expression of miR-130b suppressed mutant p53-induced EMT and ZEB1 expression. Importantly, the expression of miR-130 was significantly reduced in EC tissues, and patients with higher expression levels of miR-130b survived longer. These data provide a novel understanding of the roles of p53 gain-of-function mutations in accelerating tumor progression and metastasis through modulation of the miR-130b-ZEB1 axis.
Volume 32(27)
Pages 3286-95
Published 2013-7-4
DOI 10.1038/onc.2012.334
PII onc2012334
PMID 22847613
PMC PMC3705163
MeSH Aged Aged, 80 and over Blotting, Western Disease Progression Endometrial Neoplasms / genetics* Endometrial Neoplasms / pathology Epithelial-Mesenchymal Transition / genetics* Female Gene Expression Regulation, Neoplastic* Homeodomain Proteins / metabolism* Humans MicroRNAs / metabolism* Middle Aged Mutation Neoplasm Invasiveness / genetics Signal Transduction / physiology Transcription Factors / metabolism* Tumor Suppressor Protein p53 / genetics* Zinc Finger E-box-Binding Homeobox 1
IF 6.634
Times Cited 170
Human and Animal Cells