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ERBB2突变定义了与高瘤突变负担相关的子宫内膜癌和微卫星不稳定性高 (MSI-H) 分子类型的子组

Melica Nourmoussavi Brodeur¹, Pier Selenica¹, Weining Ma²

¹Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

Molecular oncology

|July 20, 2024

概括

带有ERBB2突变的子宫内膜癌 (EC) 是一个独特的亚型. 这些突变与ERBB2放大不同,通常与微卫星不稳定性高和POLE亚型有关,影响治疗策略.

科学领域:

在瘤学瘤学.
遗传学是一个遗传学.
分子生物学分子生物学

背景情况:

抗HER2治疗的目标是ERBB2增强/过度表达的子宫内膜癌 (EC).
ERBB2突变是一种替代激活机制,但在欧洲很少报告.
鉴定ERBB2突变EC的特征对于理解其独特的生物学和治疗影响至关重要.

研究的目的:

调查ERBB2突变子宫内膜癌的临床病理和遗传特征.
为了比较ERBB2突变EC与ERBB2野生型和ERBB2放大EC.
评估ERBB2突变和扩增在EC中的预后意义.

主要方法:

使用临床瘤-正常面板测序对2638个EC的队列进行分析.
鉴定致病性ERBB2突变和同时发生的ERBB2放大.
免疫组织化学评估HER2蛋白表达.
分子亚型,瘤突变负担和染色体不稳定性的组间比较.

主要成果:

发现69个 (2.6%) 具有致病性ERBB2突变的EC;11个还具有ERBB2放大.
最常见的ERBB2突变是V842I (38%) 和R678Q (25%).
对MSI-H和POLE亚型进行了丰富的ERBB2-突变/非放大EC,具有高瘤突变负担和低染色体不稳定性.
在大多数ERBB2突变EC中观察到低HER2蛋白表达.
在单变量分析中,ERBB2放大,而不是单独的突变,与更糟糕的预后有关.

结论:

ERBB2突变定义了一个罕见的,病原性独特的子组子宫内膜癌.
这个子组与ERBB2-野生型和ERBB2-放大型EC有很大的不同.
这些发现强调了基因分析对于理解EC异质性和指导向治疗的重要性.

关键词:

在ERBB2中,它是ERBB2.在HER2中,HER2是HER2.这是子宫内膜癌的癌症.微卫星的不稳定性突变是一种突变.

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