DNAM-1-based chimeric antigen receptors enhance T cell effector function and exhibit in vivo efficacy against melanoma

Cancer Immunol Immunother. 2015 Apr;64(4):409-18. doi: 10.1007/s00262-014-1648-2. Epub 2014 Dec 31.

Abstract

Chimeric antigen receptor (CAR) T cell therapies hold great potential for treating cancers, and new CARs that can target multiple tumor types and have the potential to target non-hematological malignancies are needed. In this study, the tumor recognition ability of a natural killer cell-activating receptor, DNAM-1 was harnessed to design CARs that target multiple tumor types. DNAM-1 ligands, PVR and nectin-2, are expressed on primary human leukemia, myeloma, ovarian cancer, melanoma, neuroblastoma, and Ewing sarcoma. DNAM-1 CARs exhibit high tumor cell cytotoxicity but low IFN-γ secretion in vitro. In contrast to other CAR designs, co-stimulatory domains did not improve the expression and function of DNAM-1 CARs. A DNAM-1/CD3zeta CAR reduced tumor burden in a murine melanoma model in vivo. In conclusion, DNAM-1-based CARs may have the potential to treat PVR and nectin-2 expressing hematological and solid tumors.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Antigens, Differentiation, T-Lymphocyte / genetics
  • Antigens, Differentiation, T-Lymphocyte / immunology
  • Antigens, Differentiation, T-Lymphocyte / metabolism*
  • Blotting, Western
  • CD3 Complex / genetics
  • CD3 Complex / immunology
  • CD3 Complex / metabolism*
  • Cytotoxicity, Immunologic / immunology*
  • Humans
  • Melanoma / immunology*
  • Melanoma / metabolism
  • Melanoma / pathology
  • Mice
  • Mice, Inbred C57BL
  • RNA, Messenger / genetics
  • Real-Time Polymerase Chain Reaction
  • Receptors, Antigen, T-Cell / immunology*
  • Reverse Transcriptase Polymerase Chain Reaction
  • T-Lymphocytes / immunology*
  • Tumor Cells, Cultured

Substances

  • Antigens, Differentiation, T-Lymphocyte
  • CD226 antigen
  • CD3 Complex
  • CD3 antigen, zeta chain
  • RNA, Messenger
  • Receptors, Antigen, T-Cell