THE RELATIONSHIP OF DNA INTERCALATE AGENTS AND INHIBITORS OF DNA TOPOISOMERASE II AND ANT 1TUMOR ACTION-INTRODUCING TWO METHODS FOR ANTITUMOR DRUG SCREENING
Two methods for antitumor drug screening are introduced in this paper. Experiments showed that the drugs which are able to intercalate into the supercoiled pBR322 DNA and induce DNA chain cleavage or inhibit the activity of DNA topoisomerase Ⅱ would have antitumor effect. Acridine derivatives, 9-(2-4-dichloro-phenoxyacetyl-amino) -acridine, 9-(2-4-5-trichlorophenoxyacetyl-amino)-acridine and 9-(p-chloro-phenoxyacetyl-amino) -acridine, can intercalate into the supercoiled pBR322 DNA and have DNA cleaving eff...