miR-214 and hypoxia down-regulate Necl-2/CADM1 and enhance ErbB2/ErbB3 signaling

Kenji Momose, Akihiro Minami, Yohei Shimono, Kiyohito Mizutani, Kentaro Nobutani, Takeshi Azuma, Yoshimi Takai

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Necl-2/CADM1 is down-regulated by the promoter hypermethylation and/or the loss of heterozygosity at chromosome 11q23.2 in many types of cancers and serves as a tumor suppressor by interacting in cis with ErbB3 and suppressing the ligand-induced ErbB2/ErbB3 signaling for cell movement and death. However, the incidence of these epigenetic and genetic abnormalities of Necl-2 is 30-60% in these cancers. We investigated here other mechanisms that down-regulate Necl-2. miR-214, that is frequently up-regulated in a variety of cancers, targeted the 3′UTR of the Necl-2 mRNA directly, suppressed the translation of Necl-2 and enhanced the ligand-induced ErbB2/ErbB3 signaling in human colon cancer Caco-2 cells. Hypoxia reduced the Necl-2 protein level in a manner independent of miR-214 or hypoxia-inducible factor-1α in Caco-2 cells. These results indicate that miR-214 and hypoxia are novel regulators that down-regulate Necl-2 and enhance ErbB2/ErbB3 signaling.

Original languageEnglish
Pages (from-to)195-202
Number of pages8
JournalGenes to Cells
Volume18
Issue number3
DOIs
Publication statusPublished - 03-2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Genetics
  • Cell Biology

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