[Antitumor effects of cisplatin, cyclophosphamide and interferon-gamma (gamma-IFN) against argyrophil small cell carcinoma of the uterine cervix heterotransplanted into nude mice].

We investigated antitumor effect of cis-diammine-dichloroplatinum (cisplatin or CDDP), cyclophosphamide (CY) and interferon-gamma (gamma-IFN) against argyrophil small cell carcinoma (ASCC) of the uterine cervix using heterotransplanted ASCC tumor (YIK-1) into nude mice, containing HPV 16 DNA in a multicopy integrated form. No tumor growth retardation was observed in the nude mice which received the single administration of CDDP 2 mg/kg, CY 10 mg/kg or gamma-IFN 1 x 10(7) U/kg. However, the combined administration of CDDP and CY, or CDDP, CY and gamma-IFN markedly inhibited the tumor growth. Moreover, with comparison about relative tumor volume between these two groups, the combination of CDDP, CY and gamma-IFN was more effective than that of CDDP and CY. These data suggest that the combination chemotherapy of CDDP, CY and/or gamma-IFN was effective for the suppression of tumor growth in argyrophil small cell carcinoma of the uterine cervix. Further study on the antitumor potentiation of various anti-cancer agent and the combination of them against ASCC is needed.