Abstract:
:Phenotypic and functional characteristics of tumor-infiltrating lymphocytes (TIL) obtained from human primary and metastatic liver tumors were studied. Lymphocytes isolated from 18 tumors and autologous (A) peripheral blood (6 cases) were phenotyped by 2-color flow cytometry and cloned in a limiting dilution system, which allows virtually all normal T lymphocytes to proliferate; 70-80% of fresh TIL were T cells (i.e., CD3+), and the ratio of CD4+/CD8+ cells was 1.2 in both primary and metastatic liver tumors. TIL contained significantly more CD56+ (NKHI+) cells, half of which were CD3+CD56+, CD3+CD25+ cells and CD3+HLA-DR+ cells, than A-PBL. The frequencies of proliferating T-cell precursors (PTL-p) and cytolytic T-lymphocyte precursors (CTL-p) reactive with K562, allogeneic tumor cells and autologous tumor cells, were determined. Mean PTL-p frequencies for TIL from hepatocellular carcinomas, cholangiocarcinomas and metastatic liver tumors were 0.52 (0.22-0.83), 0.10 (0.05-0.16) and 0.16 (0.01-0.30), respectively. The frequency of CTL-p with natural-killer-like activity was lower in TIL than in A-PBL. The frequency of CTL-p for autologous tumor cells in fresh TIL isolated from primary liver tumors was 0.02-0.13 and 12/81 clones were reactive against autologous tumor. In contrast, only 1/66 TIL clones obtained from colon carcinomas metastatic to liver showed autotumor reactivity. No clones reactive with autologous tumor were obtained from peripheral blood of patients with liver cancer. These data indicate that substantial differences in anti-tumor functions of TIL between primary and metastatic liver tumors exist, which can be detected at a clonal level.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Shimizu Y,Iwatsuki S,Herberman RB,Whiteside TLdoi
10.1002/ijc.2910460521subject
Has Abstractpub_date
1990-11-15 00:00:00pages
878-83issue
5eissn
0020-7136issn
1097-0215journal_volume
46pub_type
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