Induction of the glucocorticoid-induced leucine zipper gene limits the efficacy of dendritic cell vaccines

L. Lebson, T. Wang, Q. Jiang, K. A. Whartenby

Research output: Contribution to journalArticle

Abstract

Dendritic cell (DC) vaccines have shown great promise in generating antitumor immune responses but have generally fallen short of producing durable cures. Determining mechanisms by which these vaccines fail will provide one strategy toward improving their success. Several manipulations of DCs have improved their migration and longevity, but the immune inhibitory environment surrounding tumors provides a powerful suppressive influence. To determine the mechanisms by which DCs at the site of the tumor convert to a suppressive phenotype, we evaluated pathways in DCs that become expressed at the tumor site. Our results revealed that tumors lead to induction of the glucocorticoid- induced leucine zipper (GILZ) gene in DCs, and that this gene is critical for the development of tumor-induced tolerance of both DCs and T cells. Previous data suggested that GILZ is a pivotal gene in the balance between activation and tolerance of DCs. Our new data show that GILZ is highly upregulated in DCs in the tumor microenvironment in vivo and that blockade of this gene in DC vaccines significantly improves long-term survival. These results suggest that GILZ may be an ideal candidate gene to target for novel immune-based tumor therapies.

Original languageEnglish (US)
Pages (from-to)563-570
Number of pages8
JournalCancer Gene Therapy
Volume18
Issue number8
DOIs
StatePublished - Aug 2011

Keywords

  • GILZ
  • dendritic cell
  • dendritic cell vaccine
  • immunotherapy
  • tumor vaccine

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Cancer Research

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