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1991 ; 82
(4
): 464-9
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Augmentation by tumor necrosis factor alpha of the systemic therapeutic effect of
lymphokine-activated killer cells in adoptive immunotherapy of murine tumor
#MMPMID1904426
Kato K
; Tanabe T
; Agatsuma T
; Suzuki S
; Nitanai H
; Hashimoto Y
Jpn J Cancer Res
1991[Apr]; 82
(4
): 464-9
PMID1904426
show ga
The therapeutic effect of a combined modality of lymphokine-activated killer
(LAK) cells and tumor necrosis factor alpha (TNF alpha) on MBL-2 tumor in C57BL/6
mice was studied. Murine LAK cells induced from splenocytes by interleukin 2
(IL2) could lyse MBL-2 target cells in vitro. but no enhancement of the LAK
activity was found by the treatment of LAK cells with TNF alpha in vitro.
However, the treatment of MBL-2 with TNF alpha enhanced the sensitivity to LAK
cells. Moreover, administration of TNF alpha to mice bearing solid MBL-2 tumor
led to increased tumor vascular permeability within 1 h, and resulted in the
enhanced accumulation of systemically transferred LAK cells in tumor tissue.
Based on these results, we treated MBL-2-bearing mice with TNF alpha and then
with LAK cells 1 h later. No therapeutic effect was observed when tumor-bearing
mice were treated with TNF alpha alone or LAK cells plus IL2. However, adoptive
immunotherapy using LAK cells and TNF alpha had therapeutic effects, i.e., growth
inhibition of tumor nodules and prolongation of survival. These results indicated
that appropriately timed pretreatment of tumor-bearing mice with TNF alpha
augmented the anti-tumor efficacy of LAK cells.