The effect of cisplatin and carboplatin on c-myc promoter in erythroleukemic cells

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Abstract
The recombinant plasmids p324, p330 and p323 carrying 5‘ flanking c-myc sequences linked to the reporter gene chloramphenicol acetyl-transferase (cat) were introduced into the mouse erythroleukemia cell line F412B2TK and stable transfectants resistant to geneticin were obtained. The effects of two platinum coordination compounds, cisplatin and carboplatin, were studied using a wide range of drug concentrations. It was found that cisplatin stimulates cat gene expression with maximum effect at 5 ± 10−5 M concentration, while carboplatin at concentrations from 1 ± 10−6 to 1 ± 10−4 M did not have any effect. These results demonstrate that cisplatin stimulates transcription from the c-myc promoter in erythroleukemia cells and may support the use of carboplatin as compared to cisplatin in the treatment of cancer patients.

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