抗肺癌新药艾维替尼临床前研究成果发表
艾维替尼(AC0010)分子和EGFR靶点结合模拟图
论文首次披露了艾维替尼化学结构,以及针对肺癌耐药性基因突变T790M的分子结构设计、筛选、优化过程及原理。并用一系列的分子细胞生物学方法及动物模型研究,论证了艾维替尼分子结构设计的独特优势及成药的潜在可能性。通过系统的临床前研究,具有独特化学结构的艾维替尼体现了第一、二代EGFR抑制剂所不具备的三个重要抗肺癌的药理特征:
1、高选择性抑制导致肺癌的EGFR突变基因,而对具有生理功能的正常EGFR没有作用,其选择优势高达300倍。因而艾维替尼的副作用非常小。
2、克服肺癌EGFR基因的耐药突变,有效抑制耐药肺癌细胞的生长,从而克服肺癌耐药。
3、不可逆抑制肺癌EGFR突变基因,可永久性阻断EGFR突变基因的致癌通路,具有更好的治疗效果。
论文同时也发表了艾维替尼的初步临床结果,在晚期肺癌病人上,艾维替尼同样展现出了在细胞水平和动物研究中所获得的特点和优势。
业内人士表示,艾维替尼在《Molecular Cancer Therapeutics》(《分子肿瘤治疗》)发表的临床前和前期临床研究成果,展示了艾维替尼创新研究的过程及其安全、毒副作用低、效果优等特点。
目前,艾维替尼正在中国开展II/III期临床研究和美国I期临床研究,进展顺利。
文章摘要如下:
AC0010 is a pyrrologyrimidine-based epidermal growth factor receptor(EGFR) inhibitor,structurally distinct from previously reported pyrimidine-based irreversible EGFR inhibitors such as osimertinib and rociletinib.AC0010 selectively inhibits EGFR active and T790M mutations with up to 298-fold increase in potency compared to wild-type EGFR.In a xenografte model,oral administration of AC0010 at daily dose of 500 mg/kg resulted in complete remission of tumors with EGFR active and T790M mutations for over 143 days with no weight loss.Three major metabolites of AC0010 were tested and showed no wild-type EGFR inhibition and off-target effects such as inhibition of IGF-1R.AC0010 is safe in non-small cell lung cancer(NSCLC) patients at the dose range between 50 mg and 550 mg once per day and no hyperglycemia and other severe adverse effects were detected such as grade 3 QT prolongation. The objective responses were observed in NSCLC patients with EGFR T790M mutation.
论文发表网址:http://mct.aacrjournals.org/content/early/2016/08/27/1535-7163.MCT-16-0281
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