title: Synthesis, DNA binding and cytotoxicity of new pyrazole emodin derivatives.
abstract: A series of new anthrapyrazoles were derived from emodin by attaching various cationic alkyl amino side chains onto a pyrazole ring which had been incorporated into the anthraquinone chromophore. Compared with emodin, the derivatives had significantly higher DNA binding affinity based on interaction with calf thymus DNA, and much more potent cytotoxicity against different tumor cells. The derivatives with a mono-cationic alkyl side chain exhibited the highest DNA binding affinity and cytotoxicity.
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510080, China.
authors.forename: J-H
authors.initials: JH
authors.lastname: Tan
authors.forename: Q-X
authors.initials: QX
authors.lastname: Zhang
authors.forename: Z-S
authors.initials: ZS
authors.lastname: Huang
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.forename: X-D
authors.initials: XD
authors.lastname: Wang
authors.forename: L-Q
authors.initials: LQ
authors.lastname: Gu
authors.forename: J Y
authors.initials: JY
authors.lastname: Wu
mesh_terms: D000818:Animals; D002417:Cattle; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004247:DNA / Q000737:chemistry* / Q000378:metabolism*; D004642:Emodin / Q000031:analogs & derivatives / Q000138:chemical synthesis* / Q000737:chemistry / Q000633:toxicity*; D006801:Humans; D051379:Mice; D015394:Molecular Structure; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000633:toxicity*; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship
chemical_list: D011720:Pyrazoles; D004247:DNA; C427203:calf thymus DNA; D004642:Emodin