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HER2 Amplification in p53-Mutated Endometrial Carcinomas
Ambre Balestra1, Denis Larsimont2, Jean-Christophe Noël2,3
1Department of Gynecology, ULB-Erasme, HUB, 808 Route de Lennik, 1070 Bruxelles, Belgium.
Cancers
|March 11, 2023
Summary
p53-mutated endometrial cancers often recur. This study found HER2 overexpression and gene amplification in a significant portion of these aggressive tumors, suggesting HER2-targeted therapies may be beneficial.
Area of Science:
- Oncology
- Molecular Pathology
Background:
- p53 mutations are linked to recurrence and metastasis in endometrial carcinomas.
- Identifying novel therapeutic targets is crucial for improving patient outcomes.
Purpose of the Study:
- To investigate the prevalence of HER2 protein overexpression and gene amplification in p53-mutated endometrial carcinomas.
- To assess the potential of HER2-targeted therapies in aggressive endometrial carcinoma subtypes.
Main Methods:
- Retrospective analysis of 118 endometrial carcinomas.
- Immunohistochemistry (IHC) for HER2 protein expression.
- Chromogenic in situ hybridization (CISH) for HER2 gene amplification.
Main Results:
- p53 mutations were present in 29.6% of cases.
- HER2 protein overexpression (IHC 2+ or 3+) was observed in 31.4% of p53-mutated cases.
- HER2 gene amplification was detected in 36.3% of cases with available CISH data, particularly in serous, clear cell, and carcinosarcoma subtypes.
Conclusions:
- A subset of p53-mutated endometrial carcinomas exhibit HER2 overexpression and gene amplification.
- These findings support the potential utility of HER2-targeted therapies for specific aggressive endometrial carcinoma variants.
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