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An Orthotopic Model of Serous Ovarian Cancer in Immunocompetent Mice for in vivo Tumor Imaging and Monitoring of Tumor Immune Responses
Published on: November 28, 2010
The immunoexpression of EGFR, HER2 and HER3 in malignant serous ovarian tumors
Andreea Elena Cîrstea1, Alex Emilian Stepan, Claudiu Mărgăritescu
1Department of Pathology, University of Medicine and Pharmacy of Craiova, Romania; astepan76@yahoo.com.
Abstract:
The expression of epidermal growth factor (EGF) receptors is common in human carcinomas and the proteins are used as therapeutics targets. In this study, we analyzed the immunoexpression of EGFR, HER2 (EGFR2) and HER3 (EGFR3) in 41 cases of serous borderline ovarian tumors and carcinomas, in relation to the degree of differentiation and tumor stage. The quantification of the results was done using the final staining score (FSS), which took into account the number of labeled cells and the intensity of immunoreactions. For all the receptors, the FSS values corresponding to the high-grade serous carcinomas were significantly superior compared with low-grade carcinomas and borderline tumors. Also, the FSS values associated with advanced stages ovarian tumors were significantly superior compared to those in the initial stages. In this study, we found positive linear correlations between the values associated with the expression of EGF receptors. The relation of EGFR, HER2 and HER3 immunoexpression with the lesion subtype, tumor grade and stage, designates the EGF receptors system as possible therapeutic target in ovarian serous tumors.
Insights
Epidermal growth factor (EGF) receptor expression is elevated in high-grade ovarian cancers and advanced stages. This suggests EGF receptors are potential therapeutic targets for ovarian serous tumors.
Area of Science:
- Oncology
- Molecular Biology
- Pathology
Background:
- Epidermal growth factor (EGF) receptors are frequently expressed in human carcinomas.
- These receptors are established targets for cancer therapeutics.
- Understanding their expression in ovarian tumors is crucial for treatment strategies.
Purpose of the Study:
- To analyze the immunoexpression of EGFR, HER2, and HER3 in ovarian serous tumors.
- To correlate receptor expression with tumor grade and stage.
- To evaluate the EGF receptor system as a potential therapeutic target in ovarian cancer.
Main Methods:
- Immunoexpression analysis of EGFR, HER2, and HER3 in 41 ovarian serous tumors.
- Quantification using Final Staining Score (FSS), considering cell labeling and reaction intensity.
- Statistical analysis to compare expression levels across different tumor grades and stages.
Main Results:
- Significantly higher FSS values for all EGF receptors in high-grade serous carcinomas compared to low-grade and borderline tumors.
- Elevated FSS values in advanced stage ovarian tumors versus initial stages.
- Positive linear correlations observed between the expression levels of EGFR, HER2, and HER3.
Conclusions:
- EGFR, HER2, and HER3 immunoexpression correlates with tumor subtype, grade, and stage in ovarian serous tumors.
- The EGF receptor system represents a promising therapeutic target for ovarian serous tumors.
- Further investigation into targeting these receptors may lead to improved treatment outcomes.
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