Kondo H, Tanaka N, Naomoto Y, Orita K
Gan To Kagaku Ryoho. 1987 May;14(5 Pt 1):1234-9.
Antiproliferative effect and the effect on cell cycle distribution of human recombinant interferon (rHu-IFN)-alpha, -beta and -gamma in combination on a human colon cancer cell line were investigated in vitro. Combined treatment with rHuIFN-beta and rHuIFN-gamma had a marked antiproliferative effect. Combination of rHuIFN-beta (200U/ml) and rHuIFN-gamma (200JRU/ml) had a similar antitumor effect to rHuIFN-gamma (5,000JRU/ml). From the analysis of the cell cycle obtained by flow cytometry, rHuIFN-beta showed accumulation of the S phase, while rHuIFN-gamma revealed accumulation of the G1 phase. With the combination of rHuIFN-beta and rHuIFN-gamma, G2 + M phase decreased markedly and G1 phase increased. These results suggest that combined treatment with rHuIFN-beta and rHuIFN-gamma can be an effective therapy for human cancer.