Antitumor combilexin. A thiazole-containing analogue of netropsin linked to an acridine chromophore.
We report the synthesis, DNA-binding properties and antitumor activity of ThiaNetGA, a hybrid molecule in which are conjugated a thiazole-lexitropsin and an intercalating anilinoacridine chromophore. This combilexin molecule binds to DNA via a bimodal process involving minor groove binding of the lexitropsin moiety and intercalation of the acridine moiety. The uptake and distribution of the hybrid in L1210 leukemia cells were investigated by ESR spectroscopy using a spin-labeled derivative. The nitroxide-containing conjugate accumulates preferentially in the cell nuclei and rapidly saturates the nuclear receptor sites. Both in vitro and in vivo assays indicate that the drug is practically nontoxic but exhibits moderate antitumor activity against P388 leukemia cells in mice.
Institut de Chimie Pharmaceutique, Lille, France.
B
B
Plouvier
R
R
Houssin
B
B
Hecquet
P
P
Colson
C
C
Houssier
M J
MJ
Waring
J P
JP
Hénichart
C
C
Bailly
D000166:Acridines / Q000737:chemistry*; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D002467:Cell Nucleus / Q000378:metabolism; D002942:Circular Dichroism; D004247:DNA / Q000737:chemistry / Q000378:metabolism; D003850:Deoxyribonuclease I / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D007364:Intercalating Agents / Q000138:chemical synthesis; D007939:Leukemia L1210 / Q000188:drug therapy; D007941:Leukemia P388 / Q000188:drug therapy; D051379:Mice; D008811:Mice, Inbred DBA; D009429:Netropsin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology; D013050:Spectrometry, Fluorescence
D000166:Acridines; D000970:Antineoplastic Agents; D007364:Intercalating Agents; C092012:ThiaNetGA; D009429:Netropsin; D004247:DNA; D003850:Deoxyribonuclease I