Effect of Steadily Down-regulating VE-Cadherin Expression on Susceptibitity of K562 Cells to Chemotherapy / 中国实验血液学杂志
Journal of Experimental Hematology
; (6): 691-697, 2018.
Article
в Zh
| WPRIM
| ID: wpr-690927
Ответственная библиотека:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of steadily down-regulating the expression of VE-cadherin on the chemotheraputic sensitivity of K562 cells, and explore its possible mechanism.</p><p><b>METHODS</b>Specifically targeting interference sequences carrying human VE-cadherin were designed, the recombinant lentiviral vector containing the IRES-GFP and NEO segment was constructed; recombinant lentivirus was generated by three-plasmids packing system, and transfected into K562 cells, then the cells steadily down-regulated were sorted. CCK-8 assay was performed to evaluate the VE-cadherin of chemotherapeutic (Imatinib) sensitivity of K562 cells. The apoptosis was analyzed by flow cytometry with Annexin V/7-AAD double labeling. The expressions of CD133 and ALDH1 mRNA were determined by real time PCR. The protein expressions of VE-cadherin, BCR-ABL and β-catenin were analyzed by Western blot.</p><p><b>RESULTS</b>The recombinant lentiviral vector pLB-shVEC-NEO-IRES-GFP was successfully constructed, packed into the lentivirus, then the K562 cells steadily down-regulating VE-cadherin expression was obtained. When VE-cadherin was down-rengulated in K562 cells, the proliferation rate was reduced while the the apoptosis rate was increased; the mRNA levels of CD133 and ALDH1 also were reduced; BCR-ABL fusion protein was not obviously changed; the total β-catenin protein, as well as the nuclear β-catenin protein were decreased in the K562/shVEC cells. Conclution K562 cells are more susceptible to chemotherapy when VE-cadherin is down-regulated, that may be realized via reducing the stability and the nuclear transfer of β-catenin protein.</p>
Полный текст:
1
База данных:
WPRIM
Основная тема:
Antigens, CD
/
Cadherins
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Fusion Proteins, bcr-abl
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Apoptosis
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K562 Cells
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Cell Proliferation
/
Metabolism
Пределы темы:
Humans
Язык:
Zh
Журнал:
Journal of Experimental Hematology
Год:
2018
Тип:
Article