Inhibitory effect of Rnai on AML1 -ETO fusion gene expression in leukemia cells.
- Author:
Ju WEI
1
;
Su LI
;
Chun WANG
;
You-Wen QIN
;
Xiao-Xia MA
;
Kuang-Cheng XIE
;
Shi-Ke YAN
;
Yan-Rong GAO
;
Qi CAI
Author Information
- Publication Type:Journal Article
- MeSH: Cell Cycle; genetics; Cell Line, Tumor; Cell Proliferation; Core Binding Factor Alpha 2 Subunit; genetics; metabolism; Humans; Leukemia; genetics; metabolism; pathology; Oncogene Proteins, Fusion; genetics; metabolism; RNA Interference; RUNX1 Translocation Partner 1 Protein; Transfection
- From: Chinese Journal of Hematology 2008;29(9):607-610
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEBy inhibiting AML1 -ETO fusion gene expression in Kasumi-1 cells with RNAi, to investigate the changes in cell proliferation and cell cycle.
METHODSThe small interference RNAs (siRNAs) specifically targeting the AML1 -ETO fusion gene were synthesized in vitro and transfected into Kasumi-1 cells by electroporation, the non-specific siRNAs transfected cells were taken as control. EGFP plasmid was transfected into Kasumi-1 cell and the transfection efficiency was detected by FCM. Inhibitory effect of siRNAs were detected by real-time RT-PCR and Western blots. Cell proliferation was measured by CCK-8 assay. DNA content was detected by PI assay.
RESULTSThe transfection efficiency was 44.5%. The AML1 -ETO specific siRNAs inhibited AML1 -ETO expression at both mRNA and protein levels. The cell proliferation rate in siRNAs treated group was lower than that in control group 72 h after transfection [(47.90 +/- 0.02)% vs (66.90 +/- 0.08)% , P < 0.05]. The cell cycle was blocked at G1 phase 72 h after siRNAs treatment, the cell proportion in G1 phase being 38.3% and 31.6% in control group, while in G2/M phase being 1.8% and 2.4% respectively.
CONCLUSIONSThe synthesized siRNAs can inhibit AML1 -ETO fusion gene expression. AML1 -ETO specific siRNA induced the decline of AML1 -ETO fusion protein in Kasumi-1 cell, and then caused the cell cycle blocked in G1 stage and eventually inhibited the cell proliferation.