EGFRTKI耐药后治疗策略.ppt
《EGFRTKI耐药后治疗策略.ppt》由会员分享,可在线阅读,更多相关《EGFRTKI耐药后治疗策略.ppt(49页珍藏版)》请在优知文库上搜索。
1、EGFR-TKI耐药后治疗策略表皮生长因子信号通路EGFR-TKI 获得性耐药机制 Major Mechanisms of Acquired Resistance Identified in Clinical Specimens Mechanism Estimated Frequency(%)EGFR TKI resistanceGenetic alterations in EGFRT790M mutations 50D761Y,T854A,and L747S mutations 5EGFR amplification 8Bypass signaling tractsMET amplifica
2、tion 5-22HER2 amplification 12PIK3CA mutations 5BRAF mutations 1 HGF overexpression 1 of 2 casesPhenotypic alterationsTransformation to small-cell lung cancer 3-14ALK TKI 耐药机制 ALK TKI resistanceGenetic alterations in ALK 所占比例所占比例%ALK secondary mutations(eg,L1196M)22-36 ALK gene amplification 7-18 By
3、pass signaling tractsEGFR activation 44KIT gene amplification 15Abbreviations:EGFR,epidermal growth factor receptor;TKI,tyrosine kinase inhibitor;HER2,human epidermal growth factor receptor 2;HGF,hepatocyte growth factor;ALK,anaplastic lymphoma kinase.酪氨酸激酶:单药用于晚期治疗无法根治疾病分期药物中位TTP参考文献CML原始细胞危象伊马替尼10
4、月Sawyers et al,2002(缓解持续)GIST晚期伊马替尼17月Heinrich et al,2004(无事件生存)肺癌晚期吉非替尼/厄洛替尼9-10月Mitsudomi et al,2009Rosell et al,2012肺癌晚期克唑替尼10月Camidge et al,2011黑色素瘤晚期Vemurafenib7月Sosman et al,2012重复活检:观察越多,发现越多Sequist et al.Sci Transl Med 2011,Adapted;Sequist,ASCO 2012.同时有EGFR扩增机制不明SCLC转化T790MTKI获得性耐药的临床定义lEGFR
5、 TKI单药的治疗l存在EGFR敏感突变l或客观临床获益l疾病进展(RECIST标准)肿瘤评价SD(大于6个月)肿瘤评价CR或PRJackman DM et al;J Clin Oncol.2010;28(2):357-60.Criteria for Acquired Resistance to EGFR Tyrosine Kinase Inhibitors1.Patient has received prior therapy with an EGFR TKI(monotherapy).2.Tumor genotyping confirms the presence of a typical
6、 EGFR mutationthat is associated with sensitivity to EGFR TKIs.Examples include exon19 deletions,L858R,and G719X.ORPatient achieves either a documented partial or complete response ORprolonged stable disease(6 months)based on RECIST or WHO criteria.3.Disease progression occurs despite uninterrupted
7、exposure to an EGFRTKI within 30 days.4.Patient has not received additional systemic therapy sincediscontinuation of EGFR TKIs.Adapted from Jackman et al.26 Abbreviations:EGFR,epidermal growth factor receptor;TKI,tyrosine kinase inhibitor.问题一:现有的治疗模式如何处理TKI继发性耐药?(Continuous treatment beyond progress
8、ion)l61名EGFR M+获得性耐药患者准备参加MSKCC的临床试验EGFR-TKI停药后的疾病“复燃”EGFR TKIPD获得性耐药721 天洗脱期临床试验14 disease flare47 completed washoutmPFS19个月Chaft,et al.Clin Cancer Res 201123%发生疾病快速进展导致住院或死亡(flare)中位发生时间:停药后8天相关因素:TTP短(P=0.002),胸膜转移(P=0.03),CNS转移(P=0.01),与T790M无关仍有依赖TKI控制的肿瘤获得性耐药的局部治疗:MSKCC经验l184颅外PD患者(7+年)中,18例接受
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- EGFRTKI 耐药 治疗 策略