Reduction of TRAIL-Induced Mcl-1 and cIAP2 by c-Myc or Sorafenib Sensitizes Resistant Human Cancer Cells to TRAIL-Induced Death

  • M. Stacey Ricci
  • , Seok Hyun Kim
  • , Kazuhiro Ogi
  • , John P. Plastaras
  • , Jianhua Ling
  • , Wenge Wang
  • , Zhaoyu Jin
  • , Yingqiu Y. Liu
  • , David T. Dicker
  • , Paul J. Chiao
  • , Keith T. Flaherty
  • , Charles D. Smith
  • , Wafik S. El-Deiry

Research output: Contribution to journalArticlepeer-review

229 Scopus citations

Abstract

Cells expressing oncogenic c-Myc are sensitized to TNF superfamily proteins. c-Myc also is an important factor in determining whether a cell is sensitive to TRAIL-induced apoptosis, and it is well established that the mitochondrial pathway is essential for apoptosis induced by c-Myc. We investigated whether c-Myc action on the mitochondria is required for TRAIL sensitivity and found that Myc sensitized cells with defective intrinsic signaling to TRAIL. TRAIL induced expression of antiapoptotic Mcl-1 and cIAP2 through activation of NF-κB. Both Myc and the multikinase inhibitor sorafenib block NF-κB. Combining sorafenib with TRAIL in vivo showed dramatic efficacy in TRAIL-resistant tumor xenografts. We propose the combination of TRAIL with sorafenib holds promise for further development.

Original languageEnglish (US)
Pages (from-to)66-80
Number of pages15
JournalCancer Cell
Volume12
Issue number1
DOIs
StatePublished - Jul 10 2007

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

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