title: [Inhibition of hTERT antisense oligodeoxynucleotide on proliferation and telomerase activity in HL-60 cells].
abstract: This study was purposed to investigate the inhibition of hTERT antisense oligodeoxynucleotide (ASODN) on the proliferation and telomerase activity in HL-60 cells and to explore the relativity between the telomerase activity and the expression of hTERT gene in HL-60 cells. After treated by hTERT ASODN the expression of hTERT was detected by RT-PCR, the morphological changes of HL-60 cells was observed with inverted microscopy, the cell proliferation was measured by MTT method, and the telomerase activity was determined with TRAP-ELISA and TRAP-PAGE. The results showed that after sealing hTERT gene with ASODN for 72 hours, the expression of hTERT gene was significantly inhibited, the cell growth was repressed and the ability of proliferation decreased, and the effect was specific in sequence and dependent in dose and time. OD(450-690) values were 2.648 +/- 0.42, 1.504 +/- 0.47, 1.223 +/- 0.39, 0.944 +/- 0.16 respectively, as the cells were treated with 0, 10, 20, 30 micromol/L ASODN for 72 hours. The difference was significant as compared 10, 20, 30 micromol/L groups with 0 micromol/L ASODN group respectively (P < 0.05), but the difference was no significant when compared 20 micromol/L SODN group (2.376 +/- 0.65) with untreated group (2.648 +/- 0.42) (P > 0.05). TRAP-PAGE detection revealed that comparing ASODN groups with SODN groups the telomerase image bands were decreased and least was found in groups of 30 +/- mol/L. It is concluded that the hTERT ASODN may inhibit the proliferation and down-regulate the telomerase activity in HL-60 cells by sealing the expression of hTERT gene.
authors.affiliation: Department of Hematology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Sun
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Yue
authors.forename: Xiu-Feng
authors.initials: XF
authors.lastname: Ge
authors.forename: Zhong-Xing
authors.initials: ZX
authors.lastname: Jiang
authors.forename: Qin-Xian
authors.initials: QX
authors.lastname: Zhang
mesh_terms: D049109:Cell Proliferation / Q000187:drug effects*; D018922:HL-60 Cells; D006801:Humans; D016376:Oligonucleotides, Antisense / Q000096:biosynthesis / Q000235:genetics*; D019098:Telomerase / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D014162:Transfection
chemical_list: D016376:Oligonucleotides, Antisense; C509186:TERT protein, human; D019098:Telomerase