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HER2 alterations across solid tumors: implications for comprehensive testing

delete2025-09-01
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OA
AI
A
Ahmed Ismail
C
Chinmay Jani
N
Nusrat Jahan
M
M. Midhun
A
Arnab Basu
G
Garima Gupta
B
Bassel F. El‐Rayes
S
Sejong Bae
T
Tyler Mattox
C
Cyntanna C. Hawkins
R
Rebecca C. Arend
M
Mehmet Akce
Y
Yanis Boumber
A
Aakash Desai *
DOI:10.1093/oncolo/oyaf258delete
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摘要

摘要

En 中文
目的 已知ERBB2 (HER2)改变(如过表达、扩增和突变)可驱动肿瘤进展。这些改变在非乳腺癌和胃癌/胃食管癌中仍缺乏充分表征。随着曲妥珠单抗德鲁替卡塞坦(T-DXd)等HER2靶向疗法的泛肿瘤批准,全面了解不同癌症中的ERBB2改变至关重要。 方法 在阿拉巴马大学对653例实体瘤标本进行了HER2分析,采用免疫组织化学(IHC)、拷贝数(CN)变异(CNV)评估和突变谱分析。采用Somers' D序数关联评估CN扩增与IHC表达之间的相关性。 结果 在653例病例中,HER2 IHC评分分布为3+(3.1%)、2+(13.2%)和1+(19.8%),其中63.9%为IHC阴性。ERBB2 CN扩增见于3.1%的病例,其中75%表现为IHC3+。致病性突变在3.1%的病例中被发现,且IHC3+率较低(5%)。在ERBB2突变样本中,仅3例存在CN扩增(1例阳性,2例中等)。Somers'-D分析显示CNV与IHC表达之间存在强关联(D = 0.73,P < .001)。 结论 本研究揭示了不同癌症中ERBB2改变的多样性及其临床意义。携带ERBB2突变的肿瘤不太可能表现出HER2蛋白3+表达或CN扩增,表明需要全面基因组分析以识别此类患者。在T-DXd针对HER2的泛肿瘤批准背景下,研究结果支持整合基因组与表型数据以提升诊断精度并指导治疗决策。对各类肿瘤进行全面的ERBB2 (HER2)检测对于扩大HER2靶向疗法的可及性至关重要。
Keyword:
HER2
ERBB2
HER2 overexpression
immunohistochemistry
copy number variation
HER2 mutational status

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Oncologist
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University of Alabama Birmingham
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University of Miami
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