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  • Title: Role of tissue factor in the antitumor effect of recombinant human tumor necrosis factor-alpha in mice.
    Author: Nishigaki F, Miyayasu K, Tsujimoto S, Manda T, Shimomura K.
    Journal: Anticancer Res; 1994; 14(6B):2573-6. PubMed ID: 7872683.
    Abstract:
    Recombinant tumor necrosis factor-alpha (rTNF-alpha) inhibited tumor growth of Meth A fibrosarcoma (Meth A) solid tumor in mice, and the antitumor effect of rTNF-alpha was significantly decreased by pretreatment with small doses or rTNF-alpha in mice. In in vitro experiments, incubation of human umbilical vein endothelial cells with rTNF-alpha enhanced procoagulant activity (PCA), which was drastically augmented after an addition of the conditioned medium of Meth A tumor cells. Furthermore, rTNF-alpha-induced PCA was decreased by pretreatment with rTNF-alpha in endothelial cells. This PCA was completely blocked after the addition of anti-human tissue factor (TF) murine monoclonal antibody. These results imply that in vivo antitumor effects of rTNF-alpha are mediated by expression of TF in endothelial cells, which is augmented by tumor released factor(s).
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