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1988 ; 79
(3
): 390-9
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Generation and characterization of lymphokine-activated killer cells against
fresh human leukemia cells
#MMPMID3131287
Tahara T
; Iseki R
; Morishima Y
; Yokomaku S
; Ohno R
; Saito H
Jpn J Cancer Res
1988[Mar]; 79
(3
): 390-9
PMID3131287
show ga
Lymphokine-activated killer (LAK) cells generated from 15 acute leukemia patients
in remission showed significant levels of cytotoxicity against Daudi 1A4, a
natural killer-resistant cell line. This indicates that lymphocytes of leukemia
patients in remission could respond to interleukin-2 to generate conventional LAK
cells. However, LAK cells caused lysis of autologous leukemia cells at
considerably lower levels in seven out of the 15 patients, with the exception of
one case (48.6% cytolysis). None of the remaining eight patients exhibited LAK
activity against autologous leukemia cells. On the other hand, patients' LAK
could lyse allogeneic leukemia cells including those resistant to autologous LAK.
Thus, patients' LAK seem not to be defective in lysis of leukemia cells. In the
cold target competition analysis, the binding of patients' LAK to leukemia cells
could be inhibited by autologous and allogeneic leukemia cell competitors,
implying that almost all leukemia cells could be recognized by patients' LAK.
Most LAK cells from normal donors showed significant lysis of allogeneic leukemia
cells, but some leukemia cells were found to be resistant to lysis. LAK cells
against both leukemia cells and Daudi 1A4 were phenotypically heterogenous, and
were predominantly observed in the T3- fraction in the precursor phase. In the
effector phase, whereas LAK activity against leukemia cells was also
predominantly shown in the T cell-depleted fraction, similar levels of LAK
activity against Daudi 1A4 were found in both the T cell-depleted and -enriched
fractions.