alexa Human interferons inhibit experimental metastases of a human melanoma cell line in nude mice.


Journal of Clinical & Experimental Dermatology Research

Author(s): Ramani P, Balkwill FR, Ramani P, Balkwill FR

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Abstract Therapy with human lymphoblastoid interferon HuIFN-alpha(N1), or recombinant human interferon gamma, rHuIFN-gamma, inhibited experimental pulmonary metastases of the human melanoma cell line, DX3-azac, in BALB/c nude mice and significantly prolonged survival. The human IFNs had no effect on nude mouse lung and spleen NK cell activity, lung macrophage activity, haemoglobin or white cell counts. HuIFN-alpha(N1) had no effect on the levels of the IFN induced enzyme 2-5A synthetase in nude mouse lungs although the rHuIFN-gamma caused some elevation. In addition, clearance of radiolabelled DX3-azac cells was identical in control or human IFN treated mice, and there was no histological evidence of an increase in immune effector cells associated with the metastatic lesions in treated mice. Human IFN therapy did not affect the state of differentiation of the melanoma cells in vivo as measured by melanin content, but both IFNs inhibited the development of colonies of DX3-azac cells in vitro. We conclude that in this model system IFNs have direct anti-proliferative effects on metastatic cells.
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This article was published in Br J Cancer and referenced in Journal of Clinical & Experimental Dermatology Research

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