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Nat Cancer:JBJ-09-063:非小细胞肺癌治疗的潜在EGFR变构抑制剂

2022-04-27 xiaozeng MedSci原创

肺癌是全球癌症相关死亡的主要原因之一,非小细胞肺癌(NSCLC)占所有肺癌的85%。

肺癌是全球癌症相关死亡的主要原因之一,非小细胞肺癌(NSCLC)占所有肺癌的85%。EGFR(表皮生长因子受体)是一种跨膜蛋白,隶属于酪氨酸激酶(TK)受体的ERBB家族,由其他三个密切相关的成员ERBB2、ERBB3和ERBB4组成。

既往研究显示,ERBB家族在基本的细胞功能中起着至关重要的作用,其能够调节细胞增殖、分化、存活和迁移等多种下游信号通路的激活。诱导受体组成型激活、扩增或过表达的突变会引起不受控制的细胞增殖的发生,这是癌症的一大标志。

EGFR突变是NSCLC中最常见致癌驱动因素之一,而EGFR也被鉴定为潜在的靶向治疗候选靶标。既往的研究显示,EGFR的小分子酪氨酸激酶抑制剂(TKI)疗法对于EGFR 突变肺癌患者具有一定的治疗效果,但通常会伴随着耐药性的出现。


JBJ-09-063的化学结构

EGFR变构抑制剂被发现能够与现有的ATP竞争性的EGFR TKI结合到不同的EGFR位点上,被认为是克服EGFR突变患者治疗耐药性的潜在治疗策略。

在该研究中,研究人员鉴定了一种更为有效的EGFR突变选择性变构抑制剂JBJ-09-063,并探究其功效。研究人员发现,JBJ-09-063对EGFR TKI敏感且对耐药模型有效,包括具有EGFR T790M和C797S突变的模型。进一步研究发现,包括EGFR L747S突变在内的EGFR能够通过与其他ERBB家族成员进行同源或异源二聚化而产生对JBJ-09-063的耐药性,但该作用对ATP竞争性EGFR TKI并无耐药性。这也是限制JBJ-09-063治疗功效的分子和生物决定因素。


JBJ-09-063的给药效果

总而言之,该研究结果揭示了JBJ-09-063作为单一药物或与EGFR TKI联用的潜在临床功效,并确定了EGFR突变肺癌的更有效的治疗策略


原始出处:

To, C., Beyett, T.S., Jang, J. et al. An allosteric inhibitor against the therapy-resistant mutant forms of EGFR in non-small cell lung cancer. Nat Cancer (14 April 2022).https://doi.org/10.1038/s43018-022-00351-8.

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    2022-11-02 liye789132251
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    2023-02-21 jklm09
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    2022-04-28 liuyiping

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