RanBPM inhibits BLT2-mediated IL-8 production and invasiveness in aggressive breast cancer cells

Jun Dong Wei, Jae Hyun Jang, Jae-Hong Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)


RanBPM is a scaffolding protein that regulates several cellular processes by interacting with various proteins. Previously, we reported that RanBPM acts as a negative regulator of BLT2, a low-affinity leukotriene B4 receptor; thus, it interferes with BLT2-mediated cell motility. In the present study, we observed that the expression levels of RanBPM were markedly reduced in the highly aggressive MDA-MB-435 and MDA-MB-231 human breast cancer cell lines compared with those in non-invasive MCF-7 cells. Additionally, we found that the restoration of RanBPM levels suppressed the invasiveness of these aggressive breast cancer cells in a manner dependent on BLT2 activation. In contrast, the knockdown of endogenous RanBPM by shRNA strongly promoted invasiveness in non-invasive MCF-7 cells. We also observed that RanBPM suppressed the invasiveness of aggressive breast cancer cells by inhibiting BLT2-mediated reactive oxygen species (ROS) generation and IL-8 production. Taken together, our results suggest that RanBPM acts as a negative regulator of BLT2, thus attenuating the invasiveness of aggressive breast cancer cells.

Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - 2017 Jan 29



  • BLT2
  • Breast cancer
  • IL-8
  • Invasiveness
  • RanBPM

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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