In vitro priming of tumor-specific cytotoxic T lymphocytes using allogeneic dendritic cells derived from the human MUTZ-3 cell line.
The adoptive transfer of in vitro-induced and expanded tumor-specific cytotoxic T lymphocytes (CTL) presents a promising immunotherapeutic approach for the treatment of cancer. The in vitro induction of tumor-reactive CTL requires repeated stimulation of CTL precursors with dendritic cells (DC). To circumvent problems like scarcity of blood DC precursors and donor variability, it would be attractive to use DC from a non-autologous, unlimited source. DCs derived from the human acute myeloid leukemia (AML) cell line MUTZ-3 are attractive candidates since these DCs closely resemble monocyte-derived DC (MoDC) in terms of phenotype and T cell stimulatory capacity. Here we demonstrate that functional CTL clones could be generated against multiple tumor-associated antigens, i.e., human telomerase reverse transcriptase (hTERT), ErbB3-binding protein-1 (Ebp1), carcinoembryonic antigen (CEA) and Her-2/neu, by stimulating CD8beta(+) CTL precursors with peptide-loaded allogeneic, HLA-A2-matched MUTZ-3-derived DC. A consistent induction capacity, as determined by MHC tetramer-binding, was found in multiple donors and comparable to autologous peptide-loaded MoDC. Functional characterization at the clonal level revealed the priming of CTL that recognized endogenously processed epitopes on tumor cell lines in an HLA-A2-restricted fashion. Our data indicate that MUTZ-3-derived DC can be used as stimulator cells for in vitro priming and expansion of functional TAA-specific effector CTL. MUTZ-3-derived DCs thus represent a ready and standardized source of allogeneic DC to generate CTL for therapeutic adoptive transfer strategies.
Santegoets
Saskia J A M
SJ
Departments of Pathology, VU University Medical Center, P.O. box 7057, 1007 MB, Amsterdam, The Netherlands.
Schreurs
Marco W J
MW
Masterson
Allan J
AJ
Liu
Ying Poi
YP
Goletz
Steffen
S
Baumeister
Hans
H
Kueter
Esther W M
EW
Lougheed
Sinéad M
SM
van den Eertwegh
Alfons J M
AJ
Scheper
Rik J
RJ
Hooijberg
Erik
E
de Gruijl
Tanja D
TD
D048868:Adaptor Proteins, Signal Transducing / Q000276:immunology; D000951:Antigens, Neoplasm / Q000276:immunology*; D002272:Carcinoembryonic Antigen / Q000276:immunology; D045744:Cell Line, Tumor; D002999:Clone Cells; D003713:Dendritic Cells / Q000276:immunology*; D015789:HLA-A2 Antigen / Q000378:metabolism; D006801:Humans; D016219:Immunotherapy, Adoptive / Q000379:methods*; D009369:Neoplasms / Q000628:therapy*; D016601:RNA-Binding Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000637:transplantation*; D019098:Telomerase / Q000276:immunology
D048868:Adaptor Proteins, Signal Transducing; D000951:Antigens, Neoplasm; D002272:Carcinoembryonic Antigen; D015789:HLA-A2 Antigen; D016601:RNA-Binding Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases; D019098:Telomerase; C101633:PA2G4 protein, human