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中国临床药理学与治疗学 ›› 2019, Vol. 24 ›› Issue (10): 1147-1154.doi: 10.12092/j.issn.1009-2501.2019.10.010

• 基础研究 • 上一篇    下一篇

同源盒基因2在黑色素瘤细胞对于曲美替尼耐药中的作用

王小丽1,陆树萍1,戴加乐2   

  1. 1嘉兴市中医医院,2浙江省荣军医院,嘉兴 314001,浙江
  • 收稿日期:2019-06-10 修回日期:2019-07-10 出版日期:2019-10-26 发布日期:2019-10-28
  • 作者简介:王小丽,女,本科,副主任药师,研究方向:临床药学。 E-mail: 112582975@qq.com
  • 基金资助:

    嘉兴市科技局科技计划项目(2018AD32141)

Role of MSX2 in melanoma cells for trametinib resistance

WANG Xiaoli 1, LU Shuping 1, DAI Jiale 2   

  1. 1 Jiaxing Chinese Medicine Hospital, 2 Zhejiang Rongjun Hospital, Jiaxing 314001, Zhejiang, China
  • Received:2019-06-10 Revised:2019-07-10 Online:2019-10-26 Published:2019-10-28

摘要:

目的:研究同源盒基因2(MSX2)在黑色素瘤细胞A375对于曲美替尼耐药中的作用机制。方法:构建曲美替尼耐药的A375细胞株(A375-AR),曲美替尼干预A375和A375-AR后采用CCK-8检测细胞活力,流式细胞术检测细胞凋亡率,蛋白免疫印迹法(Western blot)检测细胞中Bcl-2、Bax、Caspase-3、Caspase-9的表达以及MSX2的表达。采用小干扰RNA(siRNA)沉默A375-AR中MSX2基因,设计A375、A375-AR、A375-AR-MSX2,曲美替尼干预后,CCK-8检测细胞活力,流式细胞术检测细胞凋亡率,Western blot检测细胞中Bcl-2、Bax、Caspase-3、Caspase-9的表达以及MSX2的表达。构建MSX2过表达的A375细胞系(A375-OE),设置A375、A375-OE和A375-AR组,曲美替尼干预后,CCK-8检测细胞活力,流式细胞术检测细胞凋亡率,Western blot检测细胞中Bcl-2、Bax、Caspase-3、Caspase-9的表达以及MSX2的表达。结果:A375-AR对1.8 nmol/L的曲美替尼耐药,采用1.8 nmol/L曲美替尼干预后,A375细胞活力和细胞凋亡率显著高于A375-AR,A375细胞中Bcl-2基因表达水平低于A375-AR,而Bax、Caspase-3、Caspase-9的表达水平高于A375-AR。A375-AR沉默MSX2后,细胞对于曲美替尼敏感性显著增高,且细胞活力下调,凋亡率上调,细胞中Bcl-2表达下调,Bax、Caspase-3、Caspase-9的表达上调。A375过表达MSX2后,细胞对于曲美替尼敏感性显著下调,细胞活力上调,凋亡率下调,细胞中Bcl-2表达上调,Bax、Caspase-3、Caspase-9的表达下调。结论:MSX2基因可以诱导黑色素瘤细胞对于曲美替尼的耐药,是治疗黑色素瘤耐药的潜在靶点。

关键词: 同源盒基因MSX2, 黑色素瘤, 曲美替尼, 耐药

Abstract:

AIM: To study the role of homeobox gene MSX2 in the melanoma cell line A375 of trametinib resistance.  METHODS: To construct trametinib resistant A375 cell line (A375-AR). After trametinib intervented A375 and A375-AR,the cell viability was detected by CCK-8, the cell apoptosis rate was detected by flow cytometry, and the expression of Bcl-2, Bax, Caspase-3, Caspase-9 and MSX2 in the cells were detected by Western blot. Small interfering RNA (siRNA) was used to silence MSX2 gene in A375-AR. After trametinib intervented A375 and A375-AR,the cell viability was detected by CCK-8, the cell apoptosis rate was detected by flow cytometry, and the expression of Bcl-2, Bax, Caspase-3, Caspase-9 and MSX2 in the cells were detected by Western blot. To construct MSX2 over-expressing A375 cell line (A375-OE), and A375, A375-OE and A375-AR groups were set up. After trametinib intervented A375 and A375-AR,the cell viability was detected by CCK-8, the cell apoptosis rate detected by flow cytometry, and the expression of Bcl-2, Bax, Caspase-3, Caspase-9 and MSX2 in the cells were detected by Western blot. RESULTS:A375-AR was resistant to trametinib of 1.8 nmol/L, the activity of A375 cells and the rate of cell apoptosis were significantly higher than that of A375-AR, and the expression level of Bcl-2 gene in A375 cells was lower than that of A375-AR, while the expression level of Bax, Caspase-3 and Caspase-9 was higher than that of A375-AR. After A375-AR silenced of MSX2, the cells were significantly increased to the sensibility of trametinib, the apoptosis rate was up-regulated, the expression of Bcl-2 in the cells was down-regulated, and the expression of Bax, Caspase-3 and Caspase-9 was up-regulated. After A375 overexpression of MSX2, the cells were down regulated to the sensibility of trametinib, the cell viability was up-regulated, the apoptosis rate was down-regulated, the expression of Bcl-2 in the cells was up-regulated, and the expression of Bax, Caspase-3 and Caspase-9 was down regulated. CONCLUSION: MSX2 gene can induce the resistance of melanoma cells to trametinib. It is a potential target for the treatment of melanoma resistance.

Key words: homeobox gene MSX2, melanoma, trametinib, drug resistance

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