本帖最后由 monox 于 2015-7-6 11:21 编辑
6244
目前情况:
价格: xxx/g
用量: 100-150mg /bid, 建议联合使用
主要问题: 对KRAS 突变通路的MEK1/2 有效, 一般KRAS和EGFR 不共生. 所以假设外婆有 E 突变的情况下,似乎不是很乐观.
司美替尼_百度百科
http://baike.baidu.com/link?url= ... I20PrjkQv-VimEd-Mba
MEK 抑制剂。
现在的研究表明对KRAS 突变,特别是某些类型的KRAS 突变的NSCLC 患者,联合紫杉醇有增效的功能。
最常见不良反应:
中性粒细胞减少(司美替尼组/安慰剂组:67%/55%)
发热性中性粒细胞减少(司美替尼组/安慰剂组:18%/0%)
呼吸异常(司美替尼组/安慰剂组:2%/12%)
虚弱(司美替尼组/安慰剂组:9%/0%)。
这里有两点:
1. 这不是一个单用就可能有很好效果的药。
2. KRAS 突变。我记得KRAS 和EGFR 往往不共生,所以是否可以对外婆产生正作用,现阶段很难判断。
参考资料:
阿斯利康开展司美替尼用于NSCLC的III期临床研究 - 丁香园
http://yao.dxy.cn/article/62342
Impact of KRAS codon subtypes from a randomised phase II trial of selumetinib plus docetaxel in KRAS mutant advanced non-small-cell lung cancer. - PubMed - NCBI
http://www.ncbi.nlm.nih.gov/pubmed/26125448
Results:
In patients receiving selumetinib+docetaxel and harbouring KRAS G12C or G12V mutations there were trends towards greater improvement in OS, PFS and ORR compared with other KRAS mutations.
Conclusion:
Different KRAS mutations in NSCLC may influence selumetinib/docetaxel sensitivity.
癌症治疗的谣言与真相-司美替尼对非小细胞肺癌的治疗效果_靶向咨询_新浪博客
http://blog.sina.com.cn/s/blog_bff50c840102vucq.html
关于KRAS
下面这段的精要:
KRAS 突变和吸烟史还有腺癌正相关。 (34%vs6%/ 25%vs6%)
外婆不具备第一个条件。
由于抑制RAS的靶向药没有,只有通过抑制通路下游的MEK1/2 (比如6244)
6244联合紫杉醇(docetaxel) 有显著的ORR 客观缓解率.
KRAS mutant NSCLCKRAS mutations are the most common mutation detected in NSCLC and are associated with a history of tobacco use and adenocarcinoma histology. The rate of KRAS mutations observed in patients with adenocarcinoma and squamous histology reported in a recent analysis were 34% and 6%, respectively [Shepherd et al. 2013]. The rate of KRAS mutations observed among former/current smokers and never smokers in a recent meta-analysis were 25% and 6%, respectively [Mao et al. 2010]. Unfortunately, a targeted therapy is not available for this patient population and the utility of routine clinical testing is debated [Roberts and Stinchcombe, 2013]. MEK1/MEK2 are two downstream kinases in the RAS-RAF-MEK-ERK pathway and inhibition of MEK is one strategy to block signaling [Janne et al. 2013]. Selumetinib is a MEK1/MEK2 inhibitor, and preclinical evidence revealed activity in KRAS mutant xenograft models and synergy with docetaxel. A randomized phase II trial investigated docetaxel (75 mg/m2 every 3 weeks) with and without selumetinib in patients with KRAS mutant NSCLC who had progressed after first-line therapy; the primary end-point was OS. Patients assigned to the docetaxel and selumetinib (n = 44) compared with the docetaxel arm (n = 43) experienced a statistically significant improvement in ORR (37% versus 0%, p < 0.0001) and PFS (HR: 0.58, 80% CI: 0.42–0.79; p = 0.014), and a numerically superior OS (HR: 0.80, 80% CI: 0.56–1.14; p = 0.21). The rate of grade 3 or 4 neutropenia observed in the docetaxel and selumetinib and docetaxel arms was 82% and 67%, respectively, and the rate of febrile neutropenia was 18% and 0%, respectively. The rate of any adverse event leading to hospitalization in the docetaxel and selumetinib and docetaxel alone arms was 48% and 19%, respectively. While the efficacy results of this phase II study are promising, the toxicity observed in the combination arm is concerning. A phase III trial of docetaxel with selumetinib or placebo as second-line therapy for patients with KRAS mutant NSCLC has been initiated [ClinicalTrials.gov identifier: NCT01933932]. The primary endpoint is PFS and patients in both treatment arms receive prophylactic pegylated granulocyte colony stimulating factor. |