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福建中医药大学附属人民医院泌尿外科,福州 350004
谢剑云,Email:18677129@qq.com,研究方向:泌尿系统疾病。
陈伟东,Email:13305018298@189.cn。
收稿:2023-05-30,
修回:2023-07-26,
录用:2023-08-28,
纸质出版:2023-08-28
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谢剑云,陈伟东.miR-520a-5p通过调控有氧糖酵解诱导前列腺癌细胞多西他赛耐药[J].重庆医科大学学报,2023,48(8):909-915.
Xie Jianyun,Chen Weidong.miR-520a-5p induces docetaxel resistance in prostate cancer cells by regulating aerobic glycolysis[J].Journal of Chongqing Medical University,2023,48(8):909-915.
谢剑云,陈伟东.miR-520a-5p通过调控有氧糖酵解诱导前列腺癌细胞多西他赛耐药[J].重庆医科大学学报,2023,48(8):909-915. DOI: 10.13406/j.cnki.cyxb.003314.
Xie Jianyun,Chen Weidong.miR-520a-5p induces docetaxel resistance in prostate cancer cells by regulating aerobic glycolysis[J].Journal of Chongqing Medical University,2023,48(8):909-915. DOI: 10.13406/j.cnki.cyxb.003314.
目的
2
探索miR-520a-5p对前列腺癌增殖能力和多西他赛耐药性的影响及其作用机制。
方法
2
使用RT-qPCR检测PC-3/DU145前列腺癌细胞及RWPE-1前列腺正常上皮细胞中miR-520a-5p表达水平;使用免疫印迹检测miR-520a-5p是否调控糖酵解关键酶己糖激酶2(hexokinase 2,HK2)和磷酸果糖激酶(phosphofructokinase,PFKM)表达水平;使用CCK-8实验检测miR-520a-5p对前列腺癌细胞增殖能力和多西他赛耐药性的影响;使用ELISA评估培养上清中葡萄糖消耗水平和乳酸生成水平。依据转染物的不同,将所有细胞分成4组:minic组、minic NC组、inhibitor组、inhibitor NC组。
结果
2
miR-520a-5p在前列腺癌细胞中表达下调(
P
<
0.001)。与minic NC组比较,minic组可显著降低PC-3和DU145前列腺癌细胞的增殖能力(
P
<
0.001)、多西他赛半抑制浓度(IC
50
)、葡萄糖消耗水平和乳酸生成水平(
P
<
0.001);与inhibitor NC组比较,inhibitor组可明显增强PC-3和DU145前列腺癌细胞的增殖能力(
P
<
0.001)、葡萄糖消耗水平和乳酸生成水平(
P
<
0.001)。Starbase数据库提示miR-520a-5p与HK2和PFKM存在结合位点;免疫印迹结果显示,miR-520a-5p对HK2和PFKM的表达存在负调控关系。使用2-DG抑制前列腺癌细胞糖酵解可恢复miR-520a-5p对前列腺癌增殖能力的影响。
结论
2
前列腺癌中miR-520a-5p可能通过上调糖酵解关键酶HK2和PFKM表达水平增强前列腺癌细胞有氧糖酵解诱导多西他赛化疗耐药。
Objective
2
To explore the effects of miR-520a-5p on the proliferation and docetaxel resistance of prostate cancer cells and the potential mechanisms.
Methods
2
The expression levels of miR-520a-5p in prostate cancer cells(PC-3/DU145) and normal prostate epithelial cells(RWPE-1) were measured by RT-qPCR. Western blot was used to determine whether miR-520a-5p regulated the expression of the key glycolytic enzymes hexokinase 2(HK2) and phosphofructokinase(PFKM). The effects of miR-520a-5p on the proliferation and docetaxel resistance of prostate cancer cells were determined using cell counting kit-8. Glucose consumption and lactic acid production in the culture supernatant were assessed by enzyme-linked immunosorbent assay. According to the transfection, all cells were divided into 4 groups: minic group,minic NC group,inhibitor group and inhibitor NC group.
Results
2
miR-520a-5p was significantly down-regulated in prostate cancer cells(
P
<
0.001). Compared with the mimic NC group,the mimic group showed significant decreases in the proliferative ability(
P
<
0.001),half-maximal inhibitory concentration(IC
50
) of docetaxel,glucose consumption level,and lactic acid production level(
P
<
0.001) of PC-3 and DU145 prostate cancer cells. Compared with the inhibitor NC group,the inhibitor group showed significantly increased proliferative ability(
P
<
0.001) and glucose consumption and lactic acid production levels(
P
<
0.001) of PC-3 and DU145 prostate cancer cells. Starbase database analysis indicated that there were binding sites between miR-520a-5p and HK2 and PFKM. Western blot results showed that miR-520a-5p negatively regulated the expression of HK2 and PFKM. Inhibiting the glycolysis of prostate cancer cells by 2-DG could recover the effect of miR-520a-5p on the proliferative ability of prostate cancer.
Conclusion
2
The low expression of miR-520a-5p in prostate cancer may up-regulate the key glycolytic enzymes HK2 and PFKM to enhance aerobic glycolysis,thereby inducing resistance to docetaxel in prostate cancer cells.
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