基于蛋白质组的选择在 HER2 IHC 0 乳腺癌中实现了对 HER2 治疗的完整反应
Laura E Johnston1, Jamie Randall1, Safae Chouraichi1
1Inova Schar Cancer Institute, Inova Health System, 8081 Innovation Park Dr, Fairfax, VA, USA.
NPJ precision oncology
|September 14, 2024
概括
一项蛋白质组测试在患有HER2阴性乳腺癌的患者中确定了HER2蛋白表达,导致对特拉斯图祖马布德鲁克斯坦 (T-DXd) 治疗的完整反应. 这表明蛋白质组学可以识别可能受益于T-DXd的患者,尽管传统的HER2-负分类.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 特拉斯图祖马布德鲁克斯坦 (T-DXd) 在HER2阴性癌症中显示出有效性,但患者选择仍然具有挑战性.
- 目前的HER2测定 (IHC,FISH) 可能不准确地评估未扩大瘤中的HER2表达.
研究的目的:
- 为了研究蛋白质组测试在识别HER2-阴性患者中的HER2表达的实用性.
- 探索潜在的生物标志物来预测传统的HER2-阴性乳腺癌中的T-DXd反应.
主要方法:
- 一个重度预治疗的三阴性乳腺癌患者的案例研究,HER2 IHC 0.
- 使用CLIA认证的逆相蛋白阵列 (RPPA) 进行蛋白质组分析.
- 量化总的HER2蛋白表达和HER2激活 (pY1248).
主要成果:
- 患者最初是HER2 IHC 0,通过RPPA显示中度的HER2蛋白表达 (HER2总 2+,42%) 和激活 (HER2Y1248 1+,23%).
- 在T-DXd治疗中取得了完整的反应.
- 蛋白质组的发现表明,尽管传统的HER2阴性状态,但T-DXd是符合条件的.
结论:
- 基于蛋白质组学的测定可能提供一种更准确的方法来量化HER2表达和激活在HER2未放大/IHC0设置中的HER2.
- 这种方法可以确定符合HER2导向疗法的患者,如T-DXd,否则可能会被排除在外.
- 突出了先进的蛋白质基因技术在个性化癌症治疗选择中的潜力.
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