ERBB2-放大叶状乳腺癌同时表现出CDK12联合放大,与预后不佳的特征相关
Miriam Forster-Sack1, Martin Zoche1, Bernhard Pestalozzi2,3
1Department of Pathology and Molecular Pathology, University Hospital Zurich, Zürich, Switzerland.
The journal of pathology. Clinical research
|February 9, 2024
概括
扩大ERBB2的侵袭性叶状乳腺癌 (ILBC) 是一个独特的亚型,具有攻击性特征和频繁的CDK12联合增强. 这种分子子组与预后不佳和对HER2向疗法的耐药性有关.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 病理学 病理学 病理学
背景情况:
- 大多数侵袭性叶状乳腺癌 (ILBC) 是ERBB2-阴性 (HER2-阴性),具有CDH1突变.
- 罕见的ERBB2增强ILBC亚型存在,预后不利,对抗HER2疗法的反应降低.
研究的目的:
- 分析ERBB2-放大ILBC的临床病理和分子特征.
- 为了比较ERBB2放大ILBC与ERBB2不放大ILBC.
- 识别不同的分子特征和潜在的治疗点.
主要方法:
- 分析了来自253名ILBC患者的临床病理学数据和瘤样本.
- 免疫组织化学 (IHC) 评估了预后标志物的蛋白质表达.
- 综合基因组分析 (CGP) 在20例ILBC病例中分析了HER2状态和基因放大,与44293例侵袭性乳腺癌的数据库进行了比较.
主要成果:
- 5%的ILBCs (17/255) 显示了ERBB2放大.
- 增强ERBB2的ILBC表现出较高的瘤阶段,结节阳性,远程转移,组织学等级,激素受体阴性和SOX10阳性.
- 在70%的ERBB2-放大ILBC中检测到CDK12基因放大,这一发现在较大的乳腺癌数据库中没有观察到;在ERBB2-不放大ILBC中发现了ERBB2序列突变.
结论:
- 增强ERBB2的ILBC代表了一个独特的分子子组,其特点是频繁的CDK12联合增强.
- CDK12/ERBB2联合放大可能是这种ILBC亚型中观察到的不良预后和治疗耐药性的基础.
- ERBB2序列突变是ERBB2非增强ILBC的特征.
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