6533b86ffe1ef96bd12cd3c2
RESEARCH PRODUCT
Bleomycin inhibition of DNA synthesis in isolated enzyme systems and in intact cell systems.
H. UmezawaWerner E. G. M�llerIngrid NusslrAtsuko TotsukaRudolf K. Zahnsubject
Malecongenital hereditary and neonatal diseases and abnormalitiesLymphomaRNA-dependent RNA polymeraseBiologyBiochemistryQuailchemistry.chemical_compoundBleomycinGene expressionProtein biosynthesisAnimalsCells CulturedPharmacologychemistry.chemical_classificationDNA synthesisurogenital systemCell growthFishesnutritional and metabolic diseasesRNACell DifferentiationDNAMolecular biologySpermatozoaEnzymeBiochemistrychemistryGenesDepression ChemicalProtein BiosynthesisDNA NucleotidyltransferasesFemaleDNACell Divisiondescription
Abstract Blcomycin (BLM) inhibits DNA and RNA synthesis in different isolated enzyme systems. The inhibition effect can be reduced by adcling RNA to the reaction mixture. The activity of the RNA dependent DNA polymerase and of a cell-free protein synthesizing system is not affected by BLM. The antibiotic reduces cell proliferation (L5178y mouse lymphoma cells) in vitro at low concentrations by cytostatis and at higher concentrations by cytotoxicity. In BLM-treated L5178y cells DNA synthesis is strongly reduced, while RNA and protein synthesis are not affected. In vivo , using growing quail oviducts, cell proliferation and cytodifferentiation are markedly inhibited after BLM treatment. This is attributed to the observed inhibition of DNA synthesis. RNA and protein synthesis as well as gene expression are not influenced by BLM under the conditions used.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1975-04-15 | Biochemical pharmacology |