miRNA551b-3p Activates an Oncostatin Signaling Module for the Progression of Triple-Negative Breast Cancer

Cell Rep. 2019 Dec 24;29(13):4389-4406.e10. doi: 10.1016/j.celrep.2019.11.085.

Abstract

Genomic amplification of 3q26.2 locus leads to the increased expression of microRNA 551b-3p (miR551b-3p) in triple-negative breast cancer (TNBC). Our results demonstrate that miR551b-3p translocates to the nucleus with the aid of importin-8 (IPO8) and activates STAT3 transcription. As a consequence, miR551b upregulates the expression of oncostatin M receptor (OSMR) and interleukin-31 receptor-α (IL-31RA) as well as their ligands OSM and IL-31 through STAT3 transcription. We defined this set of genes induced by miR551b-3p as the "oncostatin signaling module," which provides oncogenic addictions in cancer cells. Notably, OSM is highly expressed in TNBC, and the elevated expression of OSM associates with poor outcome in estrogen-receptor-negative breast cancer patients. Conversely, targeting miR551b with anti-miR551b-3p reduced the expression of the OSM signaling module and reduced tumor growth, as well as migration and invasion of breast cancer cells.

Keywords: IPO8; OSMR; RNAi; STAT3; miR551b; miRNA-therapy; oncostatin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Carcinogenesis / genetics
  • Carcinogenesis / pathology
  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Nucleus / metabolism
  • Cell Proliferation / genetics
  • Disease Progression*
  • Gene Expression Regulation, Neoplastic
  • Gene Regulatory Networks
  • Humans
  • Mice, Nude
  • MicroRNAs / genetics
  • MicroRNAs / metabolism*
  • Molecular Targeted Therapy
  • Neoplasm Invasiveness
  • Oncostatin M / metabolism*
  • STAT3 Transcription Factor / metabolism
  • Signal Transduction*
  • Transcription, Genetic
  • Transcriptional Activation / genetics
  • Triple Negative Breast Neoplasms / genetics*
  • Triple Negative Breast Neoplasms / pathology*
  • Up-Regulation / genetics
  • beta Karyopherins / metabolism

Substances

  • IPO8 protein, human
  • MIRN551B microRNA, human
  • MicroRNAs
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • beta Karyopherins
  • Oncostatin M