A. Skladanowski et J. Konopa, Mitoxantrone and ametantrone induce interstrand cross-links in DNA of tumour cells, BR J CANC, 82(7), 2000, pp. 1300-1304
We show here that mitoxantrone and ametantrone induce interstrand DNA cross
-links in HeLa S-3 cells. These cross-links were observed only in cellular
system suggesting that metabolism of the drugs is a necessary step leading
to DNA cross-linking. Biologically inactive analogue of mitoxantrone, compo
und NSC 321458, did not induce cross-links in DNA of tumour cells which sug
gests that DNA crosslinking is associated with the cytotoxic and anti-tumou
r activity of these compounds. (C) 2000 Cancer Research Campaign.