实用肿瘤学杂志 ›› 2010, Vol. 24 ›› Issue (2): 112-116.doi: 10.3969/j.issn.1002-3070.2010.02.003

• 论著 • 上一篇    下一篇

PTEN、PIK3CA在培美曲塞耐药的胰腺癌细胞株Patu8988中的表达及其意义的初步探讨

顾海涛, 石欣, 林士波, 张翼, 杨军, 钱程佳   

  1. 东南大学附属中大医院普外科(南京 210009)
  • 收稿日期:2010-01-11 出版日期:2010-04-28 发布日期:2015-01-24
  • 通讯作者: 石欣,E-mail:shixined@hotmail.com
  • 作者简介:顾海涛,男,(1984-),硕士研究生,从事胰腺疾病的临床与基础研究
  • 基金资助:
    国家自然科学基金资助项目(NO.30772541)、江苏省卫生厅“科教兴卫工程”

The expression and significance of PTEN and PIK3CA in pemetrexed-resistant human pancreatic cancer cell line Patu8988

GU Haitao, SHI Xin, LIN Shibo, ZHANG Yi, YANG Jun, QIAN Chengjia   

  1. Department of General Surgery,Affiliated Zhongda Hospital of Southeast University,Nanjing 210009
  • Received:2010-01-11 Online:2010-04-28 Published:2015-01-24

摘要: 目的 探索胰腺癌细胞株Patu8988对培美曲塞产生获得性耐药的机制,分析PTEN、PIK3CA在获得耐药前后mRNA及蛋白水平变化及其对细胞迁移及侵袭能力的影响。方法 通过RT-PCR及Western blot技术分别检测正常胰腺癌细胞株Patu8988及培美曲塞耐药的胰腺癌细胞株Patu8988中PTEN及PIK3CA的mRNA及其蛋白产物表达水平变化。应用迁移及侵袭实验分别检测正常胰腺癌细胞株和耐药的胰腺癌细胞株不同生物学行为。结果 RT-PCR发现与正常胰腺癌细胞株Patu8988相比,培美曲塞耐药的胰腺癌细胞株Patu8988中,PTEN和PIK3CA在mRNA水平表达均显著增高;Western blot发现培美曲塞耐药的胰腺癌细胞株Patu8988中PTEN、PIK3CA在蛋白水平同样表达升高,PTEN和PIK3CA在耐药的胰腺癌细胞株中的表达较正常胰腺癌细胞株分别上升89%和76%;迁移及侵袭实验的结果显示,培美曲塞耐药的胰腺癌细胞株Patu8988迁移及侵袭能力较正常胰腺癌细胞株Patu8988均显著下降(P<0.05)。结论 PTEN、PIK3CA在对培美曲塞耐药的胰腺癌细胞株Patu8988中表达均异常升高,而同时高表达PTEN和PIK3CA的胰腺癌耐药细胞株的迁移及侵袭能力较正常胰腺癌细胞株显著降低,提示PTEN和PIK3CA共同参与胰腺癌细胞对培美曲塞产生获得性耐药过程,且有可能改变细胞的生物学行为。

Abstract: Objective To investigate the expression of PTEN and PIK3CA in pemetrexed-resistant human pancreatic cancer cell line Patu8988,and evaluate their effects on the biological behaviors of pancreatic cancer cell line.Methods The expression of PTEN and PIK3CA in pemetrexed-resistant pancreatic cancer cell line and normal pancreatic cancer cell line were detected by RT-PCR and Western blot analysis,respectively;Transwell test was used to detect the discrepancy between pemetrexed-resistant and non drug-resistant pancreatic cancer cell line.Result Over-expression of PTEN and PIK3CA in pemetrexed-resistant pancreatic cancer cell line Patu8988 were determined both by RT-PCR and Western blot.In pemetrexed-resistant cell line,PTEN and PIK3CA were ascended by 89% and 76% respectively as showed by Western blot,comparing with that of normal pancreatic cancer cell line.Transwell test showed that the capabilities of migration and invasion of pemetrexed-resistant pancreatic cancer cell were significantly weakened than that of normal pancreatic cancer cell line(P<0.05).Conclusion Both PTEN and PIK3CA enhanced abnormally in pemetrexed-resistant pancreatic cancer cell line Patu8988 and the co-existence of high level of PTEN and PIK3CA induced significant decrease in capabilities of migration and invasion of pemetrexed-resistant pancreatic cancer cell,which suggested mechanism of resisting to pemetrexed may involved function of PTEN and PIK3CA.They may also change the biological behavior of cancer cell.

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