Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth

Audrey Vincent, Seung Mo Hong, Chaoxin Hu, Noriyuki Omura, Angela Young, Haeryoung Kim, Jun Yu, Spencer Knight, Michael Ayars, Margaret Griffith, Isabelle Van Seuningen, Anirban Maitra, Michael S Goggins

Research output: Contribution to journalArticle

Abstract

To identify potentially important genes dysregulated in pancreatic cancer, we analyzed genome-wide transcriptional analysis of pancreatic cancers and normal pancreatic duct samples and identified the transcriptional coactivator, EYA2 (Drosophila Eyes Absent Homologue-2) as silenced in the majority of pancreatic cancers. We investigated the role of epigenetic mechanisms of EYA2 gene silencing in pancreatic cancers, performed in vitro and in vivo proliferation and migration assays to assess the effect of EYA2 silencing on tumor cell growth and metastasis formation, and expression analysis to identify genes transcriptionally regulated by EYA2. We found loss of tumoral Eya2 expression in 63% of pancreatic cancers (120/189 cases). Silencing of EYA2 expression in pancreatic cancer cell lines correlated with promoter methylation and histone deacetylation and was reversible with DNA methyltransferase and HDAC inhibitors. EYA2 knockdown in pancreatic cancer cell lines increased cell proliferation. Compared to parental pancreatic cancer cells, pancreatic cancers stably-expressing EYA2 grew more slowly and had fewer metastases in orthotopic models. The transcriptional changes after stable expression of EYA2 in pancreatic cancer cells included induction of genes in the TGFbeta pathway. Epigenetic silencing of EYA2 is a common event in pancreatic cancers and stable expression EYA2 limits the growth and metastases of pancreatic adenocarcinoma.

Original languageEnglish (US)
Pages (from-to)2575-2587
Number of pages13
JournalOncotarget
Volume5
Issue number9
StatePublished - 2014

Fingerprint

Pancreatic Neoplasms
Epigenomics
Drosophila
Adenocarcinoma
Growth
Neoplasms
Neoplasm Metastasis
Genes
Cell Line
Histone Deacetylase Inhibitors
Pancreatic Ducts
Methyltransferases
Gene Silencing
Transforming Growth Factor beta
Histones
Methylation
Cell Proliferation
Genome
DNA

Keywords

  • Epigenetic
  • EYA2
  • Pancreatic cancer

ASJC Scopus subject areas

  • Oncology
  • Medicine(all)

Cite this

Vincent, A., Hong, S. M., Hu, C., Omura, N., Young, A., Kim, H., ... Goggins, M. S. (2014). Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth. Oncotarget, 5(9), 2575-2587.

Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth. / Vincent, Audrey; Hong, Seung Mo; Hu, Chaoxin; Omura, Noriyuki; Young, Angela; Kim, Haeryoung; Yu, Jun; Knight, Spencer; Ayars, Michael; Griffith, Margaret; Van Seuningen, Isabelle; Maitra, Anirban; Goggins, Michael S.

In: Oncotarget, Vol. 5, No. 9, 2014, p. 2575-2587.

Research output: Contribution to journalArticle

Vincent, A, Hong, SM, Hu, C, Omura, N, Young, A, Kim, H, Yu, J, Knight, S, Ayars, M, Griffith, M, Van Seuningen, I, Maitra, A & Goggins, MS 2014, 'Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth', Oncotarget, vol. 5, no. 9, pp. 2575-2587.
Vincent A, Hong SM, Hu C, Omura N, Young A, Kim H et al. Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth. Oncotarget. 2014;5(9):2575-2587.
Vincent, Audrey ; Hong, Seung Mo ; Hu, Chaoxin ; Omura, Noriyuki ; Young, Angela ; Kim, Haeryoung ; Yu, Jun ; Knight, Spencer ; Ayars, Michael ; Griffith, Margaret ; Van Seuningen, Isabelle ; Maitra, Anirban ; Goggins, Michael S. / Epigenetic silencing of EYA2 in pancreatic adenocarcinomas promotes tumor growth. In: Oncotarget. 2014 ; Vol. 5, No. 9. pp. 2575-2587.
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