Volume 80, Issue 2 pp. 115-121
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Combined Effects of Differentiation-inducing Factor and Other Cytokines on Induction of Differentiation of Mouse Myeloid Leukemic Cells

Yuri Yamamoto-Yamaguchi

Yuri Yamamoto-Yamaguchi

Department of Chemotherapy, Saitama Cancer Center Research Institute, Ina-machi, Kita-adachi-gun, Saitama-ken 362, Japan

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Mikio Tomida

Mikio Tomida

Department of Chemotherapy, Saitama Cancer Center Research Institute, Ina-machi, Kita-adachi-gun, Saitama-ken 362, Japan

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Motoo Hozumi

Motoo Hozumi

Department of Chemotherapy, Saitama Cancer Center Research Institute, Ina-machi, Kita-adachi-gun, Saitama-ken 362, Japan

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Hans Rainer Maurer

Hans Rainer Maurer

Institute für Pharmazie der Freien Universität Berlin, Königin-Luise-Straβe 2±4, D-1000, Berlin 33, Federal Republic of Germany

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Tetsuro Okabe

Tetsuro Okabe

The Third Department of Internal Medicine, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan

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Fumimaro Takaku

Fumimaro Takaku

The Third Department of Internal Medicine, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan

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First published: February 1989
Citations: 9

A recipient of a Guest Foreign Research Fellowship of the Foundation for Promotion of Cancer Research of Japan. 4 Abbreviations used are: D-factor, differentiation-inducing factor; G-CSF, granulocyte colony-stimulating factor; rG-CSF, recombinant granulocyte colony-stimulating factor; TNF, tumor necrosis factor; rTNF, recombinant tumor necrosis factor; IL-1, interleukin 1; rIL-1, recombinant interleukin 1; LT, lymphotoxin; rLT, recombinant lymphotoxin.

Abstract

Mouse myeloid leukemic M1 cells are induced to differentiate into macrophage-like cells by differentiation-inducing factors (D-factors) and granulocyte colony-stimulating factor. We examined the effects of recombinant human tumor necrosis factor (rTNF), lymphotoxin (rLT) and interleukin 1 (rIL-1) on the induction of differentiation of M1 cells, compared with the effects of D-factor purified from the conditioned medium of mouse Ehrlich as cites tumor cells and recombinant human granulocyte colony-stimulating factor (rG-CSF). rIL-1 induced phagocytic activity, a typical marker of cell differentiation, in at most 30% of M1 cells at concentrations ranging from 10-10M to 10-7M. The differentiation-inducing activity of rIL-1 was similar to that of rG-CSF and less than that of D-factor. rTNF induced phagocytic activity in 14% of M1 cells only at a high concentration (10-7M). rLT did not induce differentiation of the cells even at 10-7M. rTNF stimulated induction of differentiation of M1 cells by D-factor, rG-CSF or rIL-1 by two or three fold. The combination of any two of the cytokines D-factor, rG-CSF and rIL-1 induced differentiation of M1 cells more efficiently than any of these cytokines alone. Moreover, the combination of three cytokines rG-CSF, rIL-1 and rTNF, all of which are known to be produced by macrophages, was more effective than the combination of any two of these cytokines in induction of differentiation of M1 cells.

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