title: Cytotoxic activity of isoliquiritigenin towards CCRF-CEM leukemia cells and its effect on DNA damage.
abstract: The cytotoxic activity of isoliquiritigenin (ISL) towards CCRF-CEM human T-cell leukemia cells and DNA damage induction were investigated in the present study. The anti-proliferative effect of ISL on CCRF-CEM cell line IN VITRO was analyzed. In order to further explore the underlying mechanism of cell growth inhibition of ISL towards CCRF-CEM cell line, the cell cycle distribution and mitochondrial membrane potential (DeltaPsim) disruption were measured. ISL exerted significant activity towards CCRF-CEM cells. The growth inhibitory ratio was concentration- and time-dependent with an IC(50) value of 18.38 microM. The cell cycle was arrested in the G2/M phase upon treatment with low doses of ISL. Mitochondrial membrane potential (DeltaPsim) disruption was observed at low ISL doses. The effect of ISL on DNA damage was analyzed by agarose gel electrophoresis and atomic force microscopy (AFM). Either ISL or Cu2+ failed to cause pBR322 DNA damage. However, plasmid DNA was damaged after treatment with ISL in the presence of Cu2+. Two forms of plasmid DNA closed circular and linear forms were visualized by AFM.
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, P. R. China.
authors.forename: Yuangang
authors.initials: Y
authors.lastname: Zu
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Yujie
authors.initials: Y
authors.lastname: Fu
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Shi
authors.forename: Nan
authors.initials: N
authors.lastname: Wu
authors.forename: Liping
authors.initials: L
authors.lastname: Yao
authors.forename: Thomas
authors.initials: T
authors.lastname: Efferth
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D002455:Cell Division; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D047188:Chalcones / Q000494:pharmacology*; D004249:DNA Damage; D016195:G2 Phase; D006801:Humans; D008564:Membrane Potentials / Q000187:drug effects; D018625:Microscopy, Atomic Force
chemical_list: D000970:Antineoplastic Agents; D047188:Chalcones; C040920:isoliquiritigenin