IMP1, an mRNA binding protein that reduces the metastatic potential of breast cancer in a mouse model

Chiso U. Nwokafor, Rani S. Sellers, Robert H. Singer

Research output: Contribution to journalArticle

5 Scopus citations


Cells that are able to localize β-actin mRNA efficiently have decreased metastatic potential. Invasive carcinoma cells derived from primary mammary tumors have reduced levels of an RNA binding protein IMP1/ZBP1/IGF2BP1, required for β-actin mRNA localization. We showed previously that in human breast carcinoma cells in vitro, this protein suppresses invasion. In this work we examined whether its reexpression can suppress breast cancer metastasis in a breast cancer mouse model. We developed a mouse conditionally expressing IMP1-GFP (hereinafter referred to as the IMP1 transgene) specifically in the mammary gland of a PYMT breast cancer mouse. We found that mice conditionally expressing the IMP1 transgene showed little or no metastases to the lungs from the primary tumor in contrast to PYMT mice not expressing IMP1, which uniformly develop metastases at an early stage.

Original languageEnglish (US)
Pages (from-to)72662-72671
Number of pages10
Issue number45
StatePublished - Jan 1 2016



  • Breast cancer
  • Cancer
  • IMP1
  • Metastasis
  • RNA binding protein

ASJC Scopus subject areas

  • Oncology

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