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Telomerase‐specific T‐cells kill pancreatic tumor cells in vitro and in vivo
Author(s) -
Schmidt Jan,
Ryschich Eduard,
Sievers Elisabeth,
SchmidtWolf Ingo G. H.,
Büchler Markus W.,
Märten Angela
Publication year - 2006
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/cncr.21655
Subject(s) - cytotoxic t cell , telomerase , adoptive cell transfer , cancer research , antigen , in vivo , antigen presenting cell , immunology , medicine , in vitro , biology , biochemistry , microbiology and biotechnology , gene
BACKGROUND Adoptive cell transfer is described as an innovative and challenging option for the treatment of malignant melanoma. In the current study, the generation and expansion of telomerase‐specific T‐cells for adoptive cell transfer and their use in a syngeneic pancreatic carcinoma mouse model was investigated. METHODS Telomerase‐specific T‐cells were generated either in vitro by coculture of human lymphocytes with telomerase‐peptide‐pulsed dendritic cells or in vivo by injection of peptide plus adjuvant into C57BL/6 mice. Spleens were harvested after immunization and lymphocytes were expanded in the presence of feeder cells. T‐cells were tested in vitro against human leukocyte antigen (HLA)‐matched, telomerase‐positive pancreatic carcinoma cells. Tumor‐bearing (subcutaneous) mice pretreated with cyclophosphamide were injected intravenously with the expanded cells. RESULTS It was possible to generate and expand telomerase‐specific T‐cells with cytotoxic activity. The protocol did not work as well in the murine setting. However, adoptive cell transfer with murine antigen‐specific T‐cells delayed disease progression in tumor‐bearing mice significantly. CONCLUSIONS Generation of antigen‐specific T‐cells is feasible; the expansion of these cells could be accomplished without loss of function. Antigen‐specific T‐cells demonstrated significant cytotoxic activity in a syngeneic, subcutaneous mouse model. However, further optimization of the expansion protocol is warranted. Cancer 2006. © 2005 American Cancer Society.