|
一、 EGFR简介
EGFR是原癌基因c-erbB1的表达产物,是表皮生长因子受体(HER)家族成员之一。该家族包括HER1(erbB1,EGFR)、HER2(erbB2,NEU)、HER3(erbB3)及HER4(erbB4)。HER家族在细胞生理过程中发挥重要的调节作用。
EGFR广泛分布于哺乳动物上皮细胞、成纤维细胞、胶质细胞、角质细胞等细胞表面,EGFR信号通路对细胞的生长、增殖和分化等生理过程发挥重要的作用。EGFR等蛋白酪氨酸激酶功能缺失或其相关信号通路中关键因子的活性或细胞定位异常,均会引起肿瘤、糖尿病、免疫缺陷及心血管疾病的发生。
二、 信号通路图
EGFR靶点抑制剂
三、 抑制剂CO-1686
药物简介: CO-1686 (AVL-301)是一种不可逆的,突变选择性的EGFR抑制剂,作用于EGFRL858R/T790M和EGFRWT, Ki分别为21.5 nM和303.3 nM。Phase 2。
体外活性研究: CO-1686 inhibits p-EGFR with IC50 ranging from 62 to 187 nM in the mutant EGFR–expressing cells, while inhibits EGFR phosphorylation with IC50 of > 2,000 nM in the three WT EGFR–expressing cells. CO-1686 selectively inhibits growth of NSCLC cells expressing mutant EGFR with GI50 ranging from 7 to 32 nM, and induces apoptosis. CO-1686–resistant NSCLC cell lines exhibits signs of epithelial-mesenchymal transition and increased sensitivity to AKT inhibitors.
体内活性研究: CO-1686 causes dose-dependent and significant tumor growth inhibition in all EGFR-mutant models as well as human EGFRL858R- and EGFRL858R/T790M-expressing transgenic mice.
|
|