Inhibitory Effect of NPM Gene Knockdown on Proliferation of Chronic Myeloid Leukemia Cell Line K562 and Its Mechanism.
10.19746/j.cnki.issn.1009-2137.2019.04.003
- Author:
Min-Hui LIN
1
;
Zhi-Hong ZHENG
1
;
Pei-Fang JIANG
1
;
Zheng-Jun WU
1
;
Dong-Hui GAN
1
;
Na ZHANG
1
;
Jian-Da HU
2
Author Information
1. Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, Fujian Province, China.
2. Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, Fujian Province, China,E-mail: drjiandahu@163.com.
- Publication Type:Journal Article
- MeSH:
Apoptosis;
Cell Proliferation;
Gene Knockdown Techniques;
Humans;
K562 Cells;
Leukemia, Myelogenous, Chronic, BCR-ABL Positive;
Nuclear Proteins
- From:
Journal of Experimental Hematology
2019;27(4):1008-1012
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To investigate the role of nucleophosmin (NPM) in the proliferation of chronic myeloid leukemia cells (K562 cells) and its mechanism by RNAi technology.
METHODS:shRNA was used to inhibit the expression of NPM. The expression of NPM gene was detected by real-time quantitative PCR. The effect of inhibiting NPM gene on cell proliferation was detected by MTS assay. Change of cell cycle was detected by flow cytometry. Western blot was used to detect the expression of cell cycle-related proteins.
RESULTS:The shRNA lentiviral vector targeting at NPM gene was successfully constructed and used to transfect the K562 cells. The results showed that compared with the control groups, suppression of NPM gene expression in K562 cells could inhibit the cell proliferation and decrease the cell colony formation. Moreover, interference of NPM gene could prolong G/G phase and arrest cell cycle, which may be related to the down-regulation of NPM gene expression and activation of p21 protein expression, thereby inhibited the formation of CDK2/ Cyclin E complex.
CONCLUSION:Down-regulation of NPM gene expression in K562 cells can induce cell cycle arrest and inhibit cell proliferation.
