Comparative inhibition of nuclear RNA synthesis in cultured mouse leukemia L1210 cells by adriamycin and 4'-epi-adriamycin

Chemico-biological Interactions
R G WilsonM McNeill

Abstract

Adriamycin and 4'-epi-adriamycin were compared as to their effect on nRNA synthesis. 4'-Epi-adriamycin was a more effective inhibitor than the parent compound of RNA synthesis as measured by incorporation of [3H]-uridine. Adriamycin inhibited all three species of nRNA (ribosomal, non-poly(A)hnRNA, poly(A)hnRNA) to approximately the same extent. 4'-Epi-adriamycin on the other hand inhibited the nRNA species in the following order: non-poly(A)hnRNA greater than ribosomal RNA greater than poly(A)hnRNA. The inhibitory effects of both drugs on incorporation of uridine into RNA were reversible at low concentrations (5 microgram/ml).

Citations

Nov 1, 1983·Biochemical Pharmacology·J B JohnstonR I Glazer

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