Establishment of a new natural killer (NK) cell line, TKS-1, from a patient with aggressive type of large granular lymphocyte (LGL) leukemia.
A new NK cell line, designated as TKS-1, was established from the peripheral blood of a patient with large granular lymphocyte (LGL) leukemia which showed highly aggressive clinical course. The original leukemic cells, which had a surface phenotype of CD2+, CD3-, CD16-, and CD56+, proliferated well in the presence of 200 U/ml of interleukin-2 (IL-2). Morphologically, TKS-1 cells had immature nuclei and abundant cytoplasm with fine azulophilic granules. Surface phenotype of the cell line was CD2+, CD3-, CD16-, CD57-, and CD56-, CD56 antigen disappearing during the culture. Analyses of T-cell receptor (TCR) beta- and gamma-chain genes showed germ line configurations. Functionally, TKS-1 cells showed significant cytotoxicity against K562, Raji, and Daudi target cells. We consider that TKS-1 cells originated from CD16-negative immature type of peripheral blood NK cells. This cell line will be useful not only for the investigation of NK cell leukemia, but also for that of the mechanism of cytotoxicity mediated by normal NK cells.
Division of Hematology, University of Tsukuba, Japan.
H
H
Kojima
K
K
Suzukawa
Y
Y
Yatabe
M
M
Hori
T
T
Nagasawa
T
T
Abe
D000328:Adult; D000782:Aneuploidy; D002455:Cell Division / Q000187:drug effects; D003602:Cytotoxicity, Immunologic; D006801:Humans; D007111:Immunity, Cellular; D016130:Immunophenotyping; D007376:Interleukin-2 / Q000494:pharmacology; D007694:Killer Cells, Natural / Q000166:cytology*; D007945:Leukemia, Lymphoid / Q000473:pathology*; D008297:Male; D014407:Tumor Cells, Cultured
D007376:Interleukin-2