A combination of local inflammation and central memory T cells potentiates immunotherapy in the skin

J Immunol. 2012 Dec 15;189(12):5622-31. doi: 10.4049/jimmunol.1200709. Epub 2012 Nov 9.

Abstract

Adoptive T cell therapy uses the specificity of the adaptive immune system to target cancer and virally infected cells. Yet the mechanism and means by which to enhance T cell function are incompletely described, especially in the skin. In this study, we use a murine model of immunotherapy to optimize cell-mediated immunity in the skin. We show that in vitro-derived central but not effector memory-like T cells bring about rapid regression of skin-expressing cognate Ag as a transgene in keratinocytes. Local inflammation induced by the TLR7 receptor agonist imiquimod subtly yet reproducibly decreases time to skin graft rejection elicited by central but not effector memory T cells in an immunodeficient mouse model. Local CCL4, a chemokine liberated by TLR7 agonism, similarly enhances central memory T cell function. In this model, IL-2 facilitates the development in vivo of effector function from central memory but not effector memory T cells. In a model of T cell tolerogenesis, we further show that adoptively transferred central but not effector memory T cells can give rise to successful cutaneous immunity, which is dependent on a local inflammatory cue in the target tissue at the time of adoptive T cell transfer. Thus, adoptive T cell therapy efficacy can be enhanced if CD8(+) T cells with a central memory T cell phenotype are transferred, and IL-2 is present with contemporaneous local inflammation.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adoptive Transfer / methods
  • Animals
  • Cell Communication / immunology
  • Cells, Cultured
  • Epidermal Cells
  • Epidermis / immunology
  • Epidermis / transplantation
  • Immune Tolerance
  • Immunity, Cellular
  • Immunologic Memory / immunology*
  • Inflammation / immunology
  • Inflammation / surgery
  • Inflammation / therapy
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Mice, Transgenic
  • Skin / cytology
  • Skin / immunology*
  • Skin / pathology*
  • Skin Transplantation / immunology
  • Skin Transplantation / methods
  • Skin Transplantation / pathology
  • T-Lymphocyte Subsets / immunology*
  • T-Lymphocyte Subsets / pathology*
  • T-Lymphocyte Subsets / transplantation