NDLI: Effects of lentivirus mediated STAT3 silencing on human chronic myeloid leukemia cells and leukemia mice

Content Provider	PubMed Central
Author	Jia, Xinyan Yang, Wenzhong Han, Jia Xiong, Hong
Copyright Year	2014
Abstract	Objective: To investigate the effects of lentivirus mediated STAT3 silencing on human chronic myeloid leukemia cells (K562) and the growth of chronic myeloid leukemia mice as well as to explore the potential mechanisms. Methods: Unbtreated K562 cells (CON), blank lentivirus transfected K562 cells (NC) and K562 cells expressing STAT3 siRNA (STAT3 siRNA) were injected into SCID mice to establish the chronic myeloid leukemia model in mice. The growth, peripheral white blood cell count and spleen index in these mice were determined. Results: In vitro experiment showed, when compared with control group, the interference efficiency of STAT3 expression was as high as 97.5% in K562 cells. Western blot assay revealed that the expression of c-Myc, Bcl-xL and Cyclin D1 reduced by 17.01%, 7.3% and 6.82%, respectively, showing significant difference when compared with control group (P < 0.01). These findings were consistent with those from fluorescence quantitative PCR. In vivo experiment showed the body weight of mice reduced progressively and the peripheral white blood cell count increased gradually in control group, accompanied by dragging hind limbs and progressive enlargement of the spleen. The body weight remained unchanged, peripheral white blood cell count reduced gradually and the spleen did not enlarge in mice treated with STAT3 siRNA expressing cells. Conclusion: Lentivirus mediated STAT3 silencing may inhibit the expression of its downstream genes (c-Myc, Bcl-xL and Cyclin D1) related to cell proliferation, apoptosis and cycle to suppress the malignant biological behaviors, and STAT3 silencing also inhibit the leukemogenic potency of K562 cells in mice.
Ending Page	4037
Starting Page	4031
File Format	PDF
ISSN	19405901
e-ISSN	19405901
Journal	International Journal of Clinical and Experimental Medicine
Issue Number	11
Volume Number	7
Language	English
Publisher	e-Century Publishing Corporation
Publisher Date	2014-11-15
Access Restriction	Open
Rights Holder	e-Century Publishing Corporation
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Biochemistry, Genetics and Molecular Biology

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