Expression of AXL enhances docetaxel-resistance of prostate cancer cells / 中华男科学杂志
National Journal of Andrology
;
(12): 302-308, 2017.
Article
in Chinese
| WPRIM
| ID: wpr-812769
ABSTRACT
Objective@#To explore the effect of the AXL expression on the chemosensitivity of prostate cancer PC-3 and DU145 cells to docetaxel and possible mechanisms.@*METHODS@#Using Western blot, we examined the expressions of the AXL protein, p-AXL and Gas6 in the docetaxel-resistant PC-3 (PC-3-DR) and DU145 (DU145-DR) cells stimulated with gradually increased concentrations of docetaxel. We transfected the PC-3 and DU145 cells with negative NC ShRNA and AXL-ShRNA, respectively, which were confirmed to be effective, detected the proliferation, apoptosis and cycle distribution of the cells by CCK8, MTT and flow cytometry after treated with the AXL-inhibitor MP470 and/or docetaxel, and determined the expression of the ABCB1 protein in the PC-3-DR and DU145-DR cells after intervention with the AXL-inhibitor R428 and/or docetaxel.@*RESULTS@#The expression of the AXL protein in the PC-3 and DU145 cells was significantly increased after docetaxel treatment (P <0.05). The expressions AXL and p-AXL were remarkably higher (P <0.05) while that of Gas6 markedly lower (P <0.05) in the PC-3 and DU145 than in the PC-3-DR and DU145-DR cells. The inhibitory effect of docetaxel on the proliferation and its enhancing effect on the apoptosis of the PC-3 and DU145 cells were significantly decreased at 48 hours after AXL transfection (P <0.05). MP470 obviously suppressed the growth and promoted the apoptosis of the PC-3-DR and DU145-DR cells, with a higher percentage of the cells in the G2/M phase when combined with docetaxel than used alone (P <0.05). R428 markedly reduced the expression of ABCB1 in the PC-3-DR and DU145-DR cells, even more significantly in combination with docetaxel than used alone (P <0.05).@*CONCLUSIONS@#The elevated expression of AXL enhances the docetaxel-resistance of PC-3 and DU145 prostate cancer cells and AXL intervention improves their chemosensitivity to docetaxel, which may be associated with the increased cell apoptosis in the G2/M phase and decreased expression of ABCB1.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pharmacology
/
Prostatic Neoplasms
/
Pyrimidines
/
Cell Count
/
Cell Cycle
/
Proto-Oncogene Proteins
/
Apoptosis
/
Receptor Protein-Tyrosine Kinases
/
ATP Binding Cassette Transporter, Subfamily B, Member 1
Limits:
Humans
/
Male
Language:
Chinese
Journal:
National Journal of Andrology
Year:
2017
Type:
Article
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