D Kherfellah

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From the rat C6 glioma cell line in culture, we selected camptothecin-resistant variants by growth in the presence of increasing amounts of this drug (C6(CPT10), C6(CPT50)and C6(CPT100), growing respectively with 10, 50 and 100 ng ml(-1)camptothecin). The degree of resistance to camptothecin ranged between 15-fold (C6(CPT10)) and 30-fold (C6(CPT50)and(More)
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