Quantitative structure-activity relationship analysis of cation-substituted polyaromatic compounds as potentiators (amplifiers) of bleomycin-mediated degradation of DNA
摘要:
A set of 21 polyheteroaromatic compounds substituted with flexible cationic groups and of similar molecular size has been analyzed for binding with DNA and for effects on the bleomycin-mediated degradation of the DNA double helix. Increases in apparent rates of the DNA digestion were observed in all cases under the experimental conditions of noncompetitive binding of these compounds and bleomycin to DNA. Surprisingly, the quantitative structure-activity relationship analysis revealed two distinct correlations despite close structural similarities for the set of bleomycin amplifiers. These unusual results are explained in terms of the formation of two stereochemically different ternary complexes of activated bleomycin-DNA-amplifier. The relevance of this finding for the design of new bleomycin amplifiers is discussed.
Structure-Activity Relationship Studies of CNS Agents, Part 25: 4,6-Di(heteroaryl)-2-(N-methylpiperazino)pyrimidines as New, Potent 5-HT2A Receptor Ligands: A Verification of the Topographic Model
作者:Maria J. Mokrosz、Lucjan Strekowski、Wei Xing Kozak、Beata Duszyńska、Andrzej J. Bojarski、Aleksandra Kłodzinska、Agnieszka Czarny、Marek T. Cegła、Anna Dereń-Wesołek、Ewa Chojnacka-Wójcik、Stefan Dove、Jerzy L. Mokrosz
DOI:10.1002/ardp.19953280906
日期:——
A series of new 4,6‐di(heteroaryl)pyrimidines containing an N‐methylpiperazino group (6–13) or an ethylenediamine chain (15–20) in position 2 were synthesized and their 5‐HT1A and 5‐HT2A receptor affinities were determined. It was shown that the substituent effects on the 5‐HT2A affinity are additive and could be described quantitatively. In a behavioral model it was also demonstrated that 6–11 are