Simvastatin in combination with meclofenamic acid inhibits the proliferation and migration of human prostate cancer PC-3 cells via an AKR1C3 mechanism

被引:28
|
作者
Sekine, Yoshitaka [1 ]
Nakayama, Hiroshi [1 ]
Miyazawa, Yoshiyuki [1 ]
Kato, Haruo [1 ]
Furuya, Yosuke [1 ]
Arai, Seiji [1 ]
Koike, Hidekazu [1 ]
Matsui, Hiroshi [1 ]
Shibata, Yasuhiro [1 ]
Ito, Kazuto [1 ]
Suzuki, Kazuhiro [1 ]
机构
[1] Gunma Univ, Grad Sch Med, Dept Urol, 3-9-22 Showa Machi, Maebashi, Gunma 3718511, Japan
关键词
prostate cancer; statins; meclofenamic acid; AKR1C3; ANDROGEN RECEPTOR; EXPRESSION; ATORVASTATIN; ENZYMES; LNCAP; LINES;
D O I
10.3892/ol.2017.7721
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Statins have become of interest in research due to their anticancer effects. However, the exact mechanism of their anticancer properties remains unclear. The authors previously reported that statins decrease intracellular cholesterol levels in androgen-independent prostate cancer cells. In de novo androgen synthesis, cholesterol is the primary material and certain enzymes have important roles. The present study aimed to determine whether simvastatin alters the expression of androgen synthesis-associated enzymes in androgen-independent prostate cancer cells. A novel combination therapy of statins and other drugs that inhibit the overexpression of enzymes involved in androgen synthesis was explored. The cytotoxicity of simvastatin and meclofenamic acid was assessed in prostate cancer cells using MTS and migration assays. Testosterone and dihydrotestosterone concentrations in the culture medium were measured using liquid chromatography-tandem mass spectrometry. RAC-a-serine/threonine-protein kinase (Akt) phosphorylation was detected by western blot analysis. Following treatment with simvastatin, aldo-keto reductase family 1 member C3 (AKR1C3) expression increased in PC-3 (>60-fold) and LNCaP-LA cells, however not in 22Rv1 cells. Small interfering (si) RNA was used to clarify the effects of AKR1C3 expression. The reduction in AKR1C3 expression in PC-3 cells following siRNA transfection was not associated with basal cell proliferation and migration; however, treatment with simvastatin decreased cell proliferation and migration. The combination of simvastatin and meclofenamic acid, an AKR1C3 inhibitor, further enhanced the inhibition of cell proliferation and migration compared with treatment with either drug alone. Furthermore, treatment with simvastatin attenuated insulin-like growth factor 1-induced Akt activation; however, the combination of simvastatin and meclofenamic acid further inhibited Akt activation. These results suggest that the combination of simvastatin and meclofenamic acid may be an effective strategy for the treatment of castration-resistant prostate cancer.
引用
收藏
页码:3167 / 3172
页数:6
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