Antitumor activity of 1-nitro-9-aminoacridine derivatives.

Results of studies on the antitumor activity of 26 newly synthetized 1-nitro-9-aminoacridine derivatives by means of in vitro and in vivo tests are presented. 15 derivatives among those showed repeated activity against the sarcoma growth. There were compounds with alkylaminopropyl chains, with hydroxyalkyl-aminoalkyl chains and also with hydroxyalkyl chains on amino group of 1-nitro-9-aminoacridine molecule. The other compounds with aminoacids in position 9 of 1-nitroacridine were active at higher doses. The remaining 7 compounds did not show any antitumor activity. Some aspects of the cellular antineoplastic response, as well as the morphologic appearance of the tumor invasion zone, were studied in comparison with the results of the screening tests. It seems that apart from the structural similarity each derivative has an individual influence on the host reactivity during the tumor growth.