表皮生长因子受体突变细胞系H1650耐药机制探讨

背景与目的表皮生长因子受体(epidermalgrowthfactorreceptor,EGFR)高表达和突变与40%左右的肺癌有关,已成为靶向治疗药物研究热点;随着Gefitinib和Erlotinib作为EGFR酪氨酸激酶抑制剂(tyrosinekinaseinhibitor,TKI)代表药物应用于临床,继而产生的耐药现象亦成为临床一大难题,部分耐药机制仍不清楚。本研究探讨非小细胞肺癌(non-smallcelllungcancer,NSCLC)细胞系H1650耐药机制。方法选用real-timeR1r-PcR检测EGFR野生型NSCLC细胞系中EGFRmRNA表达水平;MTT检测癌细胞对...

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Published in中国肺癌杂志 Vol. 15; no. 12; pp. 689 - 693
Main Author 韩瑞丽 王小丽 钟殿胜 赵娟 陈哲 孙琳琳 王竞 张金棒
Format Journal Article
LanguageChinese
Published 天津医科大学总医院呼吸科, 天津,300052%300052 天津,天津医科大学总医院肿瘤科 2012
天津市肺癌研究所%天津市肺癌研究所
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ISSN1009-3419
1999-6187
DOI10.3779/j.issn.1009-3419.2012.12.02

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Summary:背景与目的表皮生长因子受体(epidermalgrowthfactorreceptor,EGFR)高表达和突变与40%左右的肺癌有关,已成为靶向治疗药物研究热点;随着Gefitinib和Erlotinib作为EGFR酪氨酸激酶抑制剂(tyrosinekinaseinhibitor,TKI)代表药物应用于临床,继而产生的耐药现象亦成为临床一大难题,部分耐药机制仍不清楚。本研究探讨非小细胞肺癌(non-smallcelllungcancer,NSCLC)细胞系H1650耐药机制。方法选用real-timeR1r-PcR检测EGFR野生型NSCLC细胞系中EGFRmRNA表达水平;MTT检测癌细胞对Erlotinib的药物敏感性;Westernblot检测EGFR突变NSCLC细胞系突变情况和Erlotinib及P13K抑制剂(LY294002)对EGFR突变型NSCLC细胞下游信号蛋白磷酸化水平的影响。结果EGFR野生型细胞系中,EGFRm对姐表达水平高低不一,但均对Erlotinib耐药;EGFR突变型细胞系中,HCC827和H1650为同种突变类型,HCC827对Erlotinib敏感,H1650则相对耐药;检测显示,H1650细胞中PTEN表达缺失,给予Erlotinib和LY294002处理后,HCC827中p-AKT明显被抑制,但H1650中p-AKT下调不明显。结论在NSCLC细胞系中,Erlotinib药物敏感性与EGFR的mRNA表达高低无关,但与EGFR的突变类型有关;H1650对Erlotinib相对耐药可能与PTEN缺失导致的p-AKT持续活化有关。
Bibliography:Lung neoplasms; Epidermal growth factor receptor; Mutation; Erlotinib resistance
Ruili HAN, Xiaoli WANG, Diansheng ZHONG, Juan ZHAO, Zhe CHEN, Linlin SUN, Jing WANG, Jinbang ZHANG (1Department of Respiratory Medicine; 2Department of Medical Oncology, Tianfin Medical University General Hospital, Tianjin 300052, China; Tianjin Lung Cancer Institute, Tianjin Medical University General Hospital, Tianjin 300052, China)
Background and objective Epidermal growth factor receptor (EGFR) overexpression and mutations were existed in more than 40% of the lung cancer, and it's the one of molecular targets in dinical treatment. But the EGFR tyro- sine kinase inhibitors (TKI)-resistance is becoming a challenging clinical problem as following the application of EGFR-TKIs, Gefitinib or Erlotinib. However, the mechanistic explanation for resistance in the some cases is still lacking. Here we researched the resistance mechanism of H1650 cells. Methods Using real-time RT-PCR to analyze the EGFR mRNA expression level in EGFR wild-t
ISSN:1009-3419
1999-6187
DOI:10.3779/j.issn.1009-3419.2012.12.02