Adoptive immunotherapy with redirected T cells produces CCR7- cells that are trapped in the periphery and benefit from combined CD28-OX40 costimulation

Hum Gene Ther. 2013 Mar;24(3):259-69. doi: 10.1089/hum.2012.247.

Abstract

Adoptive therapy of cancer with genetically redirected T cells showed spectacular efficacy in recent trials. A body of preclinical and clinical data indicate that young effector and central memory T cells perform superior in a primary antitumor response; repetitive antigen engagement, however, drives T-cell maturation to terminally differentiated cells associated with the loss of CCR7, which enables T cells to persist in peripheral tissues. In this work, we explored the antitumor efficacy of CCR7(-) T cells when redirected in an antigen-dependent fashion by a chimeric antigen receptor (CAR) toward tumors in the periphery. CAR-engineered CCR7(-) T cells more efficiently accumulated at the tumor site, secreted more IFN-γ, expressed higher amounts of cytotoxic molecules, and showed superior tumor cell lysis compared to the younger CCR7(+) cells. CCR7(-) T cells, however, were more prone to spontaneous and activation-induced cell death, which could be counteracted by simultaneous CD28 and OX40 (CD134) costimulation. Consequently, the combined CD28-ζ-OX40 signaling CAR rescued CCR7(-) T cells from apoptosis, which then produced more efficient antitumor efficacy than CCR7(+) T cells redirected by the same CAR. Data suggest that T-cell therapy will benefit from combined CD28-ζ-OX40 stimulation in the long-term by rescuing continuously generated CCR7(-) T cells for an antitumor attack.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • CD28 Antigens / immunology*
  • CD28 Antigens / metabolism
  • Cell Death / immunology
  • Humans
  • Immunologic Memory
  • Immunophenotyping
  • Immunotherapy, Adoptive*
  • Lymphocyte Activation
  • Mice
  • Mice, Knockout
  • Neoplasms / immunology
  • Neoplasms / therapy
  • Phenotype
  • Receptors, CCR7 / deficiency*
  • Receptors, CCR7 / genetics
  • Receptors, CCR7 / metabolism
  • Receptors, OX40 / genetics
  • Receptors, OX40 / immunology*
  • Receptors, OX40 / metabolism
  • Signal Transduction
  • T-Lymphocytes / cytology
  • T-Lymphocytes / immunology*
  • T-Lymphocytes / metabolism*

Substances

  • CD28 Antigens
  • Receptors, CCR7
  • Receptors, OX40