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中国临床药理学与治疗学 ›› 2017, Vol. 22 ›› Issue (4): 412-417.

• 基础研究 • 上一篇    下一篇

泛素特异性肽酶22诱导胰腺癌细胞对吉西他滨耐药的观察

王宛明,董贾中,管淑敏   

  1. 河南省濮阳市人民医院消化科,濮阳 457000,河南
  • 收稿日期:2017-02-04 修回日期:2017-02-20 出版日期:2017-04-26 发布日期:2017-04-26
  • 作者简介:王宛明,女,本科,副主任医师,主要从事胰腺癌耐药和胰腺癌发病机制的研究。 Tel:13938300643 E-mail:g1453629@sina.com

Effect of USP22 on gemcitabine chemoresistance in human pancreatic cancer cell

WANG Wanming, DONG Jiazhong, GUAN Shuming   

  1. Department of Gastroenterology, Puyang People's Hospital, Puyang 457000, Henan, China
  • Received:2017-02-04 Revised:2017-02-20 Online:2017-04-26 Published:2017-04-26

摘要:

目的: 探讨泛素特异性肽酶22( ubiquitin specific peptidase 22,USP22)在胰腺癌吉西他滨耐药中的作用。方法: 采用Western blot检测吉西他滨诱导不同胰腺癌细胞株对USP22表达情况的影响。利用胰腺癌SW1990亲本细胞株,构建吉西他滨耐药细胞株SW1990/Gem及USP22 siRNA稳定表达细胞株(表示为SW1990-shUSP22、SW1990/Gem-shUSP22);采用CCK-8实验检测抑制USP22表达对胰腺癌细胞吉西他滨敏感性的影响。结果: 1 μmol/L或10 μmol/吉西他滨诱导人胰腺癌PANC-1和SW1990细胞后,USP22表达均增高(P<0.05或P<0.01)。耐药细胞株SW1990/Gem中USP22蛋白表达显著高于SW1990亲本细胞株(P<0.01)。USP22 siRNA稳定表达细胞株SW1990-shUSP22,SW1990/Gem-shUSP22中USP22蛋白表达水平与相应对照组SW1990-NC,SW1990/Gem-NC相比,分别显著下调约65%(P<0.01)和60%(P<0.01)。SW1990-NC组和SW1990-shUSP22组对吉西他滨的IC50分别为(1 850.96±87.37) nmol/L和(534.83±49.68) nmol/L,差异具有统计学意义(P<0.01)。SW1990/Gem-shUSP22组对吉西他滨的IC50为(2 157.08±120.32) nmol/L,与SW1990/Gem-NC组(29 850.96±345.78) nmol/L相比,差异具有统计学意义(P<0.01);与SW1990-NC组(1 387.58±96.56) nmol/L相比,差异无统计学意义(P>0.05)。结论: 吉西他滨可诱导胰腺癌细胞USP22表达增高。抑制USP22表达可增加胰腺癌细胞对吉西他滨的药物敏感性,并可有效逆转胰腺癌细胞对吉西他滨的耐药。本研究揭示胰腺癌细胞对吉西他滨耐药的新机制,为改善胰腺癌个体化化疗方案提供新思路。

关键词: 泛素特异性肽酶22, 胰腺癌, 吉西他滨, 耐药

Abstract:

AIM: To evaluate the potential effect of  USP22 on gemcitabine chemoresistance in pancreatic cancer cells.  METHODS: USP22 expression was detected by Western blot in pancreatic cancer cell lines PANC-1 and SW1990 treated with gemcitabine. The IC50 values of different pancreatic cancer cells to gemcitabine were detected by cell counting kit 8 (CCK-8) assays. RESULTS: USP22 expression was induced by certain dose of gemcitabine treatment in pancreatic cancer cells. CCK-8 assay demonstrated that the IC50 values in SW1990-NC group and SW1990-shUSP22 group were (1 850.96±87.37) nmol/L and (534.83±49.68) nmol/L, respectively. Furthermore, the IC50 values in SW1990-NC, SW1990/Gem-NC and SW1990/Gem-shUSP22 groups were (1 387.58±96.56) nmol/L, (29 850.96±345.78) nmol/L and (2 157.08±120.32) nmol/L, respectively. CONCLUSION: Gemcitabine treatment increases the expression of USP22 in pancreatic cancer cells. Knock-down USP22 expression could enhance the chemosensitivity to gemcitabine in pancreatic cancer cells, but also rescue the gemcitabine resistance in pancreatic cancer cells.

Key words: USP22, pancreatic cancer, gemcitabine, resistance

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