T-regulatory cells in tumour-specific vaccination strategies

Marij J.P. Welters, Sytse J. Piersma, Sjoerd H. van der Burg

Research output: Contribution to journalReview article

17 Scopus citations

Abstract

Background: Immunotherapy against cancer does not result in impressive clinical responses. Failure of vaccine-induced T-cell-mediated immunotherapy to improve therapeutic results occurs for many reasons, including regulatory networks imposed by growing tumours, intrinsic properties of cancer cells, suboptimal design of therapeutic vaccines and subversion of the immune system. Most vaccines are incapable of inducing strong immunity, the vaccine's capacity to induce effector T cells is blocked by regulatory T cells (Tregs) in the lymph nodes, the vaccine-induced T cells are not able to infiltrate the tumour, tumour-infiltrating T cells cannot exert their effector function due to locally present Tregs and/or vaccines may induce/boost Tregs. Objective/methods: We focus on the negative effects of Tregs in cancer immunotherapy and highlight potential therapeutic options to counteract these. Conclusions: Interplay and balance between Tregs and effector cells determines the efficacy of vaccines and thereby clinical outcome.

Original languageEnglish
Pages (from-to)1365-1379
Number of pages15
JournalExpert opinion on biological therapy
Volume8
Issue number9
DOIs
StatePublished - Sep 1 2008
Externally publishedYes

Keywords

  • Cancer
  • Immunotherapy
  • Regulatory T cells
  • Vaccine

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