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- W2031754616 abstract "The DNA thermal stabilizing effect and the antileukemic properties of a Pt-pentamidine complex have been studied. The results indicate that the pentamidine ligands in Pt-pentamidine probably have an interaction with the DNA stronger than that of pentamidine alone because they are bound to the nucleic acid through the cis-PtCl2 residues. However, the cis-PtCl2 residues do not seem to significantly destabilize the helix. Two types of evidences are consistent with this hypothesis: (1) a decrease in the dielectric constant of the medium does not remove the pentamidine ligands from the Pt-pentamidine: DNA complex, and (2) the renaturation of the DNA in Pt-pentamidine:DNA complex is DNA concentration independent. 1H- and 13C-NMR spectroscopic data together with the elemental analysis indicate that the complex is a stoichiometric oligomer of formula [(cis-PtCl2)3(pentamidine)3] [PtCl4]2. This drug exhibits significant antineoplastic activity in BDF1 mice bearing i.p. L1210 leukemia. At a concentration of 50 mg/kg, about 15% of the LD50 for the 1,5 and 9 days schedule, the antitumor activity (T/C = 337%) is considerably superior to that of cis-DDP (T/C = 215%) or carboplatin (T/C = 220%) at doses representing 75% and 50%, respectively, of the LD50 for the same treatment schedule. Moreover, it was found that the nephro-hepatotoxicity of the complex is low." @default.
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- W2031754616 date "1991-01-01" @default.
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- W2031754616 title "DNA binding properties and antileukemic (L1210) activity of a Pt-pentamidine complex" @default.
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- W2031754616 doi "https://doi.org/10.1016/0009-2797(91)90042-6" @default.
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