H19-Dependent Transcriptional Regulation of β3 and β4 Integrins Upon Estrogen and Hypoxia Favors Metastatic Potential in Prostate Cancer.

Cristian Ripoli, Francesco Pierconti, Claudio Grassi, Alfredo Pontecorvi, Simona Nanni, Lorenza Bacci, Francesco Pinto, Rossella Loria, Dante Rotili, Lidia Strigari, Antonello Mai, Rita Falcioni, Antonella Farsetti

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

8 Citazioni (Scopus)

Abstract

Estrogen and hypoxia promote an aggressive phenotype in prostate cancer (PCa), driving transcription of progression-associated genes. Here, we molecularly dissect the contribution of long non-coding RNA H19 to PCa metastatic potential under combined stimuli, a topic largely uncovered. The effects of estrogen and hypoxia on H19 and cell adhesion molecules' expression were investigated in PCa cells and PCa-derived organotypic slice cultures (OSCs) by qPCR and Western blot. The molecular mechanism was addressed by chromatin immunoprecipitations, overexpression, and silencing assays. PCa cells' metastatic potential was analyzed by in vitro cell-cell adhesion, motility test, and trans-well invasion assay. We found that combined treatment caused a significant H19 down-regulation as compared with hypoxia. In turn, H19 acts as a transcriptional repressor of cell adhesion molecules, as revealed by up-regulation of both β3 and β4 integrins and E-cadherin upon H19 silencing or combined treatment. Importantly, H19 down-regulation and β integrins induction were also observed in treated OSCs. Combined treatment increased both cell motility and invasion of PCa cells. Lastly, reduction of β integrins and invasion was achieved through epigenetic modulation of H19-dependent transcription. Our study revealed that estrogen and hypoxia transcriptionally regulate, via H19, cell adhesion molecules redirecting metastatic dissemination from EMT to a β integrin-mediated invasion.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
Numero di pagine24
RivistaInternational Journal of Molecular Sciences
Volume20
DOI
Stato di pubblicazionePubblicato - 2019

Keywords

  • H19
  • biomolecular analysis
  • epigenetic modulators
  • estrogen
  • hypoxia
  • lncRNA
  • prostate cancer
  • targeted therapy
  • tumor metastasis

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