Antitransgene rejection responses contribute to attenuated persistence of adoptively transferred CD20/CD19-specific chimeric antigen receptor redirected T cells in humans

Biol Blood Marrow Transplant. 2010 Sep;16(9):1245-56. doi: 10.1016/j.bbmt.2010.03.014. Epub 2010 Mar 19.


Immunotherapeutic ablation of lymphoma is a conceptually attractive treatment strategy that is the subject of intense translational research. Cytotoxic T lymphocytes (CTLs) that are genetically modified to express CD19- or CD20-specific, single-chain antibody-derived chimeric antigen receptors (CARs) display HLA-independent antigen-specific recognition/killing of lymphoma targets. Here, we describe our initial experience in applying CAR-redirected autologous CTL adoptive therapy to patients with recurrent lymphoma. Using plasmid vector electrotransfer/drug selection systems, cloned and polyclonal CAR(+) CTLs were generated from autologous peripheral blood mononuclear cells and expanded in vitro to cell numbers sufficient for clinical use. In 2 FDA-authorized trials, patients with recurrent diffuse large cell lymphoma were treated with cloned CD8(+) CTLs expressing a CD20-specific CAR (along with NeoR) after autologous hematopoietic stem cell transplantation, and patients with refractory follicular lymphoma were treated with polyclonal T cell preparations expressing a CD19-specific CAR (along with HyTK, a fusion of hygromycin resistance and HSV-1 thymidine kinase suicide genes) and low-dose s.c. recombinant human interleukin-2. A total of 15 infusions were administered (5 at 10(8)cells/m(2), 7 at 10(9)cells/m(2), and 3 at 2 x 10(9)cells/m(2)) to 4 patients. Overt toxicities attributable to CTL administration were not observed; however, detection of transferred CTLs in the circulation, as measured by quantitative polymerase chain reaction, was short (24 hours to 7 days), and cellular antitransgene immune rejection responses were noted in 2 patients. These studies reveal the primary barrier to therapeutic efficacy is limited persistence, and provide the rationale to prospectively define T cell populations intrinsically programmed for survival after adoptive transfer and to modulate the immune status of recipients to prevent/delay antitransgene rejection responses.

Publication types

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

MeSH terms

  • Adoptive Transfer / methods*
  • Antigens, CD19 / biosynthesis
  • Antigens, CD19 / genetics
  • Antigens, CD19 / immunology*
  • Antigens, CD20 / biosynthesis
  • Antigens, CD20 / genetics
  • Antigens, CD20 / immunology*
  • Humans
  • Immune Tolerance
  • Lymphoma, B-Cell / immunology
  • Lymphoma, B-Cell / therapy*
  • Lymphoma, Follicular / immunology
  • Lymphoma, Follicular / therapy
  • Lymphoma, Large B-Cell, Diffuse / immunology
  • Lymphoma, Large B-Cell, Diffuse / therapy
  • Receptors, Antigen, T-Cell / biosynthesis
  • Receptors, Antigen, T-Cell / genetics
  • Receptors, Antigen, T-Cell / immunology*
  • T-Lymphocytes, Cytotoxic / immunology*
  • T-Lymphocytes, Cytotoxic / physiology
  • T-Lymphocytes, Cytotoxic / transplantation*
  • Transfection
  • Transgenes / immunology*


  • Antigens, CD19
  • Antigens, CD20
  • Receptors, Antigen, T-Cell