Isolation and preliminary characterization of bleomycin-resistant mutants from Chinese hamster ovary cells

Journal of Cellular Physiology
S Akiyama, M Kuwano

Abstract

Stable mutants resistant to an anticancer antibiotic, bleomycin-A2, were selected in Chinese hamster ovary (CHO) cell either spontaneously or after ethylmethane sulfonate mutagenesis. Fluctuation analysis showed that bleomycin resistance occurs in CHO at a rate of 6.50--6.58 x 10(-7) mutations per cell per generation. Bleomycin-A2-resistant cell lines exhibited increased resistance to bleomycin analogs--bleomycin-A5, -B2, -B4, and pepleomycin. Colchicine, mitomycin C, and ultraviolet light irradiation inhibited colony formation equally in CHO cells and in bleomycin-resistant mutants. Cell-cell hybridization tests showed that bleomycin-resistance behaves as a dominant trait. Bleomycin-inactivating activity in the mutant cell extracts was three to fourfold higher than that in extracts of the parental CHO cell.

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Citations

Jan 1, 1991·Cancer Chemotherapy and Pharmacology·R MahdadiM Lhermitte
Jan 1, 1989·Biochemical Pharmacology·S M SebtiJ S Lazo
Oct 1, 1983·Mutation Research·I C LiE H Chu
Jan 1, 1983·Pharmacology & Therapeutics·P R Twentyman
Aug 6, 1998·Oral Oncology·K W TaiM Y Chou
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Nov 30, 1983·Biochemical and Biophysical Research Communications·Y SatoM Kuwano
Jul 16, 1981·Biochemical and Biophysical Research Communications·S AkiyamaM Kuwano

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