Membrane-bound TRAIL supplements natural killer cell cytotoxicity against neuroblastoma cells

Michael A. Sheard, Shahab Asgharzadeh, Yin Liu, Tsen Yin Lin, Hong Wei Wu, Lingyun Ji, Susan Groshen, Dean A. Lee, Robert C. Seeger

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Neuroblastoma cells have been reported to be resistant to death induced by soluble, recombinant forms of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) (CD253/TNFSF10) because of low or absent expression of caspase-8 and/or TRAIL-receptor 2 (TRAIL-R2/DR5/CD262/TNFRSF10b). However, their sensitivity to membrane-bound TRAIL on natural killer (NK) cells is not known. Comparing microarray gene expression and response to NK cell-mediated cytotoxicity, we observed a correlation between TRAIL-R2 expression and the sensitivity of 14 neuroblastoma cell lines to the cytotoxicity of NK cells activated with interleukin (IL)-2 plus IL-15. Even though most NK cytotoxicity was dependent upon perforin, the cytotoxicity was supplemented by TRAIL in 14 of 17 (82%) neuroblastoma cell lines as demonstrated using an anti-TRAIL neutralizing antibody. Similarly, a recently developed NK cell expansion system employing IL-2 plus lethally irradiated K562 feeder cells constitutively expressing membrane-bound IL-21 (K562 clone 9.mbIL21) resulted in activated NK cells derived from normal healthy donors and neuroblastoma patients that also utilized TRAIL to supplement cytotoxicity. Exogenous interferon-γ upregulated expression of caspase-8 in 3 of 4 neuroblastoma cell lines and increased the contribution of TRAIL to NK cytotoxicity against 2 of the 3 lines; however, relatively little inhibition of cytotoxicity was observed when activated NK cells were treated with an anti-interferon-γ neutralizing antibody. Constraining the binding of anti-TRAIL neutralizing antibody to membrane-bound TRAIL but not soluble TRAIL indicated that membrane-bound TRAIL alone was responsible for essentially all of the supplemental cytotoxicity. Together, these findings support a role for membrane-bound TRAIL in the cytotoxicity of NK cells against neuroblastoma cells.

Original languageEnglish (US)
Pages (from-to)319-329
Number of pages11
JournalJournal of Immunotherapy
Volume36
Issue number5
DOIs
StatePublished - Jun 2013
Externally publishedYes

Keywords

  • Cytotoxicity
  • Natural killer cells
  • Neuroblastoma
  • TRAIL

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Pharmacology
  • Cancer Research

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