title: Apoptotic sensitivity to irradiation increased after transfection of chk1 antisense chain to HL-60 cell line.
abstract: The HL-60 cells were transfected with chk1 antisense and sense chain, and 24 h later subjected to irradiation. Twenty-four h after irradiation, the changes in the chk1 protein expression was assayed by Western blot, and the cell cycles and apoptosis rate detected by FCM. The irradiated apoptosis sensitivity was increased by antisense blocking of chk1 gene in HL-60 cell line with the apoptosis rate being 26.31%, significantly higher than that by the sense blocking (10.34%, 0.025 < P < 0.05). In HL-60 cells transfected with chk1 antisense chain, the G2/M phase arrest was attenuated and the cells in G2/M phase were accounted for 38.42%, significantly lower than those of the cells transfected with chkl sense chain (54.64%, 0.005 < P < 0.01). It was concluded that antisense blocking of chk1 gene could increase the apoptosis sensitivity to irradiation.
authors.affiliation: Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Tang
authors.forename: Wenli
authors.initials: W
authors.lastname: Liu
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Zhou
authors.forename: Qinglei
authors.initials: Q
authors.lastname: Gao
authors.forename: Jianhong
authors.initials: J
authors.lastname: Wu
mesh_terms: D017209:Apoptosis / Q000528:radiation effects; D002453:Cell Cycle / Q000528:radiation effects; D000071877:Checkpoint Kinase 1; D018922:HL-60 Cells; D006801:Humans; D016376:Oligonucleotides, Antisense / Q000235:genetics*; D011494:Protein Kinases / Q000235:genetics* / Q000378:metabolism; D011836:Radiation Tolerance / Q000235:genetics*; D014162:Transfection
chemical_list: D016376:Oligonucleotides, Antisense; D011494:Protein Kinases; C000605867:CHEK1 protein, human; D000071877:Checkpoint Kinase 1