Lysis of human pancreatic adenocarcinoma cells by autologous HLA-class I-restricted cytolytic T-lymphocyte (CTL) clones.
From the primary site of a pancreatic adenocarcinoma (patient BE) a permanent cell line (MZ-PC-2) was established in tissue culture. In the course of mixed lymphocyte-tumor-cell cultures (MLTC) with autologous blood-derived lymphocytes, we isolated CTL clones that lysed autologous tumor cells but not autologous EBV-transformed B cells (EBV-B) and not K562. Pre-treatment of MZ-PC-2 cells with IFN-gamma was required to obtain significant lysis in 4-hr cytotoxicity assays. IFN-gamma was superior to IFN-alpha in that respect. Among MLTC responder lymphocytes, tumor-reactive CTL proliferated more strongly in response to MZ-PC-2 cells treated with IFN-gamma than to untreated tumor cells. Three CTL clones derived from MLTC were chosen for further analysis. They were CD3+, CD8+, TCR-alpha/beta+ and behaved identically in all functional aspects tested. They all expressed the same TCR-beta chain, indicating that they descended from a common precursor lymphocyte and were directed against the same antigen. According to antibody-inhibition experiments, BE-CTL recognized their targets via an HLA-B molecule carrying the Bw6 supertypic determinant. Irrespective of pre-incubation with IFN-gamma, low levels of tumor-cell lysis, or none, were seen when MZ-PC-2 cells were kept in medium supplemented with autologous serum or serum pooled from healthy volunteers instead of FCS. Lysability was restored when TNF-alpha was added to human serum. Serum-free medium was found to enhance the susceptibility of MZ-PC-2 cells to lysis by autologous CTL.
I. Medizinische Klinik und Poliklinik, Johannes Gutenberg-Universität Mainz, Germany.
T
T
Wölfel
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W
Herr
P
P
Coulie
U
U
Schmitt
K H
KH
Meyer zum Büschenfelde
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A
Knuth
D000230:Adenocarcinoma / Q000276:immunology* / Q000473:pathology; D000328:Adult; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D001483:Base Sequence; D015395:Histocompatibility Antigens Class I / Q000276:immunology; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D007959:Lymphocyte Culture Test, Mixed; D008969:Molecular Sequence Data; D010190:Pancreatic Neoplasms / Q000276:immunology* / Q000473:pathology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000187:drug effects / Q000276:immunology* / Q000473:pathology; D014407:Tumor Cells, Cultured / Q000276:immunology / Q000473:pathology
D000911:Antibodies, Monoclonal; D015395:Histocompatibility Antigens Class I; D016693:Receptors, Antigen, T-Cell, alpha-beta; D007371:Interferon-gamma