TargetRx Atlas

MRNA basic information

  • mRNA ID:ENST00000613132
  • Gene Name:IGFBP3
  • mRNA database:Ensembl
  • mRNA expression :down-regulated
  • mRNA Method:Semi-Quantitative RT-PCR
  • mRNA Pathway:NA
  • Evidence:predicted
  • (mRNA-drug)

Drug basic information

  • Drug ID:NA
  • Drug Name:NA
  • Drug Method:NA

Disease basic infommation

  • Disease:breast cancer
  • Tissue:MCF-7 (tamoxifen-sensitive)

Other information

  • Title:IGFBP-3 sensitizes antiestrogen-resistant breast cancercells through interaction with GRP78.
  • Journal:Cancer letters
  • Published:2012
  • PubMed ID:22801219
  • Abstract:IGFBP-3 is known to possess intrinsic biological activities such as anti-tumor property in addition to its IGF/IGF-R axis-dependent actions in a variety of human cancers including breast cancer. To investigate the molecular mechanisms underlying the intrinsic biological actions of IGFBP-3 on breast cancer cells, we performed yeast two-hybrid screening and found GRP78, known to cause drug-resistance, as a binding partner of IGFBP-3. Overexpression of IGFBP-3 in antiestrogen-resistant LCC9 cells showed that IGFBP-3 interacted with GRP78, resulting in disruption of the GRP78-caspase-7 complex, thereby activating caspase-7, and further inducing apoptosis. Combination of overexpression of IGFBP-3 and application of siRNAs against GRP78 led to decrease in cell viability upon ICI 182,780 treatment. These data suggest that IGFBP-3 could sensitize antiestrogen-resistant breast cancer cells to ICI 182,780 by preventing the anti-apoptotic function of GRP78.
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