Restoration by recombinant interferon alpha A/D of host defense systems against tumor in immunosuppressed mice

Recombinant human interferon alpha A/D (alpha A/D) restored or augmented host defense systems against tumors in immunosuppressed mice. In normal C57BL/6 mice, inoculation of B16 melanoma F1 cells caused few pulmonary metastasis, whereas in mice pretreated with cyclophosphamide (CY) it caused a high...

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Bibliographic Details
Published in:Clinical & experimental metastasis 1986-01, Vol.4 (1), p.35-44
Main Authors: Nishimura, J, Mitsui, K, Tanaka, Y, Yamamoto, R, Suhara, Y, Ishitsuka, H
Format: Article
Language:English
Subjects:
Animals
Antibodies - immunology
Carrageenan - pharmacology
Cyclophosphamide - antagonists & inhibitors
G(M1) Ganglioside
Glycosphingolipids - immunology
Immunity, Innate - drug effects
Immunosuppression
Interferon Type I - immunology
Killer Cells, Natural - immunology
Melanoma - immunology
Mice
Neoplasm Metastasis
Recombinant Proteins - immunology
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Summary:Recombinant human interferon alpha A/D (alpha A/D) restored or augmented host defense systems against tumors in immunosuppressed mice. In normal C57BL/6 mice, inoculation of B16 melanoma F1 cells caused few pulmonary metastasis, whereas in mice pretreated with cyclophosphamide (CY) it caused a high incidence of pulmonary metastasis, leading to earlier death than in the normal mice inoculated with the same dose of the tumor. alpha A/D given after the CY treatment counteracted the deleterious effects of the CY treatment. Since such restorative activity was seen even against the subline of B16 F1 which had been made resistant to its direct antiproliferative effect, alpha A/D seems to exert its effect indirectly through host defense systems. However, this activity of alpha A/D in the mice pretreated with CY was abrogated by inoculation of anti-asialo GM1 serum but not by i-carrageenan. The CY treatment reduced NK activity, while alpha A/D given after the CY treatment restored or augmented the NK cell activity in lung cells and peripheral blood mononuclear cells, but not in spleen cells. These findings suggest that the restoration or augmentation of NK activity in the lung and/or peripheral blood might be the major factor leading to the antimetastatic activity of alpha A/D in the mice treated with CY.
ISSN:0262-0898
1573-7276
DOI:10.1007/BF00053471