Novel DNA bis-intercalators of isoquinolino[4,5-bc]acridines: design, synthesis and evaluation of cytotoxic activity
作者:Peng Yang、Qing Yang、Xuhong Qian
DOI:10.1016/j.tet.2005.09.065
日期:2005.12
Mono- and dinuclear isoquinolino[4,5-bc]acridine derivatives were designed and facilely synthesized, their DNA-binding affinities and cytotoxic activities were evaluated. A4 induced unwinding of supercoiled plasmid pBR 322 DNA by (36 +/- 2)degrees while A6 induced that by (41 +/- 1)degrees, both of which were higher than the mono-analogue A1 ((19 +/- 2)degrees). A6 exhibited the highest in vitro antitumor, activity against human lung cancer cell (A549) and A4 was the most active one against murine leukemia cell (P388). DNA binding constant and molecular model indicated that both the length of linker chain and the distance of interchromophore were key impact factors for DNA binding affinity and biological activity. (c) 2005 Elsevier Ltd. All rights reserved.