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  • Title: Potentiation of tumoricidal properties of murine macrophages by Nocardia rubra cell wall skeleton (N-CWS).
    Author: Inamura N, Fujitsu T, Nakahara K, Abiko M, Horii Y, Hashimoto S, Aoki H.
    Journal: J Antibiot (Tokyo); 1984 Mar; 37(3):244-52. PubMed ID: 6373700.
    Abstract:
    Intraperitoneal injection of squalene-treated cell wall skeleton of Nocardia rubra (N-CWS) caused increase in number of peritoneal exudate cells (PEC). Adherent macrophages obtained from N-CWS-treated PEC suppressed growth of methylcholanthrene-induced fibrosarcoma (Meth-A), when injected intradermally with the tumor cells into BALB/c mice. The macrophages showed strong cytotoxicity against Meth-A cells in vitro. When treated with 10 micrograms/ml of N-CWS in vitro, proteose peptone-induced macrophages acquired tumoricidal property but resident macrophages showed no cytotoxicity after the treatment. In the supernatant of spleen cells cultured for 72 hours in the presence of N-CWS (10 micrograms/ml), the presence of (a) factor(s) with macrophage activating effect was observed. This factor, shown to be identical to macrophage activating factor (MAF) in molecular weight, showed synergy with N-CWS in potentiating macrophage cytotoxicity against tumor cells.
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