CSCO看点:中国晚期NSCLC EGFR TKI耐药后T790M 突变率知多少?

2017-09-27 佚名 “肿瘤资讯”微信号

2017年,三代EGFR TKI奥希替尼正式获得CFDA批准,在中国上市。奥希替尼的上市,标志着EGFR TKI耐药后T790M突变患者二次精准治疗的起航。既往来自西方人群的小样本量研究报道显示,一代EGFR TKI耐药的患者,采用耐药后组织标本检测,EGFR T790M突变率约为60%。目前,关于中国人群EGFR TKI耐药后T790M突变的数据仍然有限。在即将召开的2017 CSCO年会上,程

2017年,三代EGFR TKI奥希替尼正式获得CFDA批准,在中国上市。奥希替尼的上市,标志着EGFR TKI耐药后T790M突变患者二次精准治疗的起航。既往来自西方人群的小样本量研究报道显示,一代EGFR TKI耐药的患者,采用耐药后组织标本检测,EGFR T790M突变率约为60%。目前,关于中国人群EGFR TKI耐药后T790M突变的数据仍然有限。在即将召开的2017 CSCO年会上,程颖教授将带来来自中国人群的大样本量研究数据,敬请期待。

EGFR突变型晚期NSCLC患者一线治疗的标准方案为一代或二代EGFR TKI。既往,多项研究显示第一、二代EGFR TKI较含铂双药化疗可显着延长EGFR突变阳性患者的PFS至9-11个月。尽管如此,大多数的患者不可避免的会产生耐药。既往研究显示,EGFR T790M突变是EGFR TKI主要的耐药机制,约占60%。奥希替尼是一种口服、强效、不可逆、具有中枢神经系统活性的EGFR TKI,可选择性抑制EGFR敏感突变与T790M突变,在EGFR TKI耐药后T790M阳性突变患者中,奥希替尼的PFS显着优于化疗,可延长PFS至10.1个月。目前,奥希替尼已经获批成为T790M突变阳性患者的标准治疗。T790M突变作为奥希替尼治疗获益筛选的生物标志物,目前,Cobas平台组织和血液检测已在全球多个国家获批。研究显示,以Cobas组织T790M检测作为对照,Cobas血液检测的敏感性约为50%。

既往T790M突变率的数据,多是来自西方人群的小样本量研究,中国人群的数据非常有限。拟在本次CSCO年会上揭晓的ASTRIS研究,将首次报道来自中国人群中EGFR TKI耐药后T790M突变的检测数据。

ASTRIS研究是一项奥希替尼治疗EGFR TKI耐药后合并EGFR T790M突变的晚期或转移性NSCLC患者的开放性、多国家、多中心的真实世界治疗研究,研究设计如下:

图:ASTRIS研究设计

研究筛选了EGFR TKI治疗进展后的局部晚期或转移性NSCLC,患者的组织或血液标本送至中心实验室采用Cobas? EGFR基因突变检测试剂盒进行检测(Cobas? EGFR Mutation Test v2)。经中心实验室检测确认为EGFR T790M突变的患者,入组ASTRIS研究。

ASTRIS研究在中国79家研究中心入组,覆盖了32座城市。自2016年9月27日第一家中心启动,至2017年3月31日主研究停止筛选,所有筛选患者ASTRIS中心实验室共收到有效标本2693例。中心实验室同时检测了血浆标本和组织标本,并单独分析采用血浆和组织标本中EGFR T790M的突变率。

本研究是第一个最大样本量的来自中国人群的T790M突变检测,将为我国EGFR TKI耐药后患者T790M的检测提供重要数据。在即将到来的CSCO年会上,吉林省肿瘤医院程颖教授将详细报道ASTRIS研究中,中国EGFR TKI耐药后的晚期NSCLC患者,组织和血浆的T790M突变率。

会议讯息

肺癌口头报告专场

主题:中国晚期非小细胞肺癌(NSCLC)患者EGFR TKI 耐药后T790M突变率

讲者:程颖教授  吉林省肿瘤医院

时间:9月29日 09:50~10:00

地点:厦门会展中心酒店C4

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    2018-03-11 zhlpower
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    2017-09-28 lsj628
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    2017-09-28 liuyiping

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