Co-occurring gain-of-function mutations in HER2 and HER3 modulate HER2/HER3 activation, oncogenesis, and HER2 inhibitor sensitivity.

Co-occurring gain-of-function mutations in HER2 and HER3 modulate HER2/HER3 activation, oncogenesis, and HER2 inhibitor sensitivity.
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HER2和HER3中共同存在的功能获得突变调节HER2/HER3的激活、肿瘤发生和HER2抑制剂的敏感性。

DOI:
10.1016/j.ccell.2021.06.001
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发表时间:
2021-08-09
期刊:
影响因子:
50.3
通讯作者:
Arteaga CL
Arteaga CL
中科院分区:
医学1区
文献类型:
--
作者:
Hanker AB;Brown BP;Meiler J;Marín A;Jayanthan HS;Ye D;Lin CC;Akamatsu H;Lee KM;Chatterjee S;Sudhan DR;Servetto A;Brewer MR;Koch JP;Sheehan JH;He J;Lalani AS;Arteaga CL

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HER2 (ERBB2) 的激活突变会驱动一部分乳腺癌和其他癌症的生长,并且往往与 HER3 (ERBB3) 错义突变同时发生。 HER2 酪氨酸激酶抑制剂 neratinib 已显示出针对 HER2 突变肿瘤的临床活性。为了表征 HER3 突变在 HER2 突变肿瘤中的作用,我们将计算结构模型与生化和细胞生物学分析相结合。计算模型预测,频繁的 HER3E928G 激酶结构域突变会增强 HER2/HER3 的亲和力,并减少 HER2 与其抑制剂 neratinib 的结合。突变型 HER2/HER3 的共表达增强了 HER2/HER3 免疫共沉淀以及 HER2/HER3 和 PI3K/AKT 的配体独立激活,从而增强了生长、侵袭性和对 HER2 靶向治疗的耐药性,而这种情况可以通过与 PI3Kα 抑制剂联合治疗来逆转。我们的结果为同时发生的 HER2/HER3 突变的进化选择提供了机制原理,并且最近的临床观察发现 HER3 突变与 HER2 突变癌症中来那替尼的不良反应相关。汉克和布朗等人。证明同时发生的 HER2 和 HER3 突变协同激活肿瘤细胞中的 HER2/HER3 和 PI3K 信号传导,导致生长、侵袭和对 HER2 抑制剂的耐药性增强。 HER2/HER3 双突变肿瘤模型对 HER2 TKI 和 PI3Kα 抑制剂的组合敏感。
Activating mutations in HER2 (ERBB2) drive the growth of a subset of breast and other cancers and tend to co-occur with HER3 (ERBB3) missense mutations. The HER2 tyrosine kinase inhibitor neratinib has shown clinical activity against HER2-mutant tumors. To characterize the role of HER3 mutations in HER2-mutant tumors, we integrate computational structural modeling with biochemical and cell biological analyses. Computational modeling predicts that the frequent HER3E928G kinase domain mutation enhances the affinity of HER2/HER3 and reduces binding of HER2 to its inhibitor neratinib. Co-expression of mutant HER2/HER3 enhances HER2/HER3 co-immunoprecipitation and ligand-independent activation of HER2/HER3 and PI3K/AKT, resulting in enhanced growth, invasiveness, and resistance to HER2-targeted therapies, which can be reversed by combined treatment with PI3Kα inhibitors. Our results provide a mechanistic rationale for the evolutionary selection of co-occurring HER2/HER3 mutations and the recent clinical observations that HER3 mutations are associated with a poor response to neratinib in HER2-mutant cancers. Hanker and Brown et al. demonstrate that co-occurring HER2 and HER3 mutations cooperatively activate HER2/HER3 and PI3K signaling in tumor cells, leading to enhanced growth, invasion, and resistance to HER2 inhibitors. HER2/HER3 double-mutant tumor models are sensitive to the combination of a HER2 TKI and a PI3Kα inhibitor.
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