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1989 ; 80
(12
): 1220-7
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Lymphokine-activated killer induction and its regulation by macrophages in
malignant pleural effusions
#MMPMID2516849
Yanagawa H
; Sone S
; Nii A
; Fukuta K
; Nakanishi M
; Maeda K
; Honda M
; Ogura T
Jpn J Cancer Res
1989[Dec]; 80
(12
): 1220-7
PMID2516849
show ga
Mononuclear cells (MNC) from pleural effusions and peripheral blood of 18
patients with primary lung cancer with malignant pleural effusion were studied.
Pleural and blood MNC generated lymphokine-activated killer (LAK) activity
similarly when cultured for 4 days with an optimal concentration of interleukin 2
(IL-2). Highly purified lymphocytes (greater than 98%) and monocyte-macrophages
(greater than 90%) were isolated by discontinuous Percoll gradient centrifugation
from pleural and blood MNC. Pleural macrophages, as well as blood monocytes,
showed significant augmenting effects on in vitro LAK cell induction from pleural
and blood lymphocytes by IL-2. During daily intrapleural administration of IL-2,
significant induction of LAK activity in vivo was observed after 3 days, but then
this LAK activity in pleural MNC decreased almost to zero by day 15. Daily
injections of IL-2 resulted in reduction in the up-regulation of LAK induction by
pleural macrophages and also in increases in the levels of soluble IL-2 receptors
in pleural effusions. These findings indicate that in vivo LAK induction of
lymphocytes in malignant effusions by IL-2 may be regulated by macrophages in the
effusions.