在癌症中,HER3 V104突变调节细胞信号,生长和药物敏感性
Rosalin Mishra1, Mary Kate Kilroy1, Wasim Feroz1
1James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, USA.
Molecular carcinogenesis
|May 16, 2024
概括
HER3-V104L突变激活癌细胞生长并降低存活率,而HER3-V104M显示扩散减少. 这两种突变都影响了对HER2,PI3K和ERK抑制剂的反应,突出了它们在癌症治疗中的临床相关性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 人体表皮生长因子受体3 (HER3) 突变发生在2%-10%的癌症中.
- 特定的HER3突变,如V104L和V104M,可能会影响癌症的进展和治疗反应.
- 了解这些突变的功能影响对于向癌症治疗至关重要.
研究的目的:
- 研究HER3-V104L和HER3-V104M突变的功能后果.
- 评估这些突变对癌细胞增殖和信号通路的影响.
- 确定 HER2,PI3K 和 ERK 抑制剂在携带这些 HER3 突变的癌症中的疗效.
主要方法:
- 使用CRISPR/Cas9来创建HER3淘汰 (HER3KO) HCC1569乳腺癌细胞.
- 通过lentiviral转导引入患者衍生的HER3突变 (V104L,V104M).
- 评估蛋白质表达 (p-HER3,p-ERK1/2),细胞增殖和信号通路激活 (AKT) 作为对向抑制剂的反应.
主要成果:
- HER3-V104L突变显示了激活作用,增加了p-HER3和p-ERK1/2水平,并减少了患者的存活率.
- 表达HER3-V104L的细胞表现出受HER2抑制剂抑制的生长.
- HER3-V104M突变与减少扩散和对ERK抑制剂的敏感性有关,HER3敲击取消了扩散.
结论:
- HER3-V104L突变具有临床相关性,促进癌症生长并表明存活率较差.
- 无论是HER3-V104L还是HER3-V104M突变都会影响细胞对HER2,PI3K和ERK抑制剂的反应.
- 针对HER3信号通路,特别是ERK,为具有这些特定突变的癌症提供了潜在的治疗策略.
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