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Establishment of a Clinic-based Biorepository
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Morphologic and clinicopathologic features of lung squamous cell carcinomas expressing Sox2
Luka Brcic1, Carol K Sherer, Yongli Shuai
1Dept of Pathology-PUH C608, University of Pittsburgh Medical Center, 200 Lothrop St, Pittsburgh, PA 15213, USA.
American Journal of Clinical Pathology
|October 23, 2012
Summary
Sox2 gene amplification and protein expression are significantly more common in lung squamous cell carcinomas (SCC) than adenocarcinomas (ADC). Higher Sox2 expression in SCC correlates with better survival, suggesting its role in lung cancer development.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Sox2 amplification is prevalent in squamous cell carcinomas (SCCs) across various sites.
- Understanding Sox2's role in lung cancer is crucial for targeted therapies.
Purpose of the Study:
- To investigate the clinicopathologic features of lung SCCs based on Sox2 expression and gene amplification.
- To correlate Sox2 status with tumor morphology and patient survival.
Main Methods:
- Analysis of 147 surgically treated non-small cell lung carcinomas.
- Fluorescence in situ hybridization (FISH) for Sox2 gene amplification.
- Immunohistochemical analysis for Sox2 protein expression.
Main Results:
- SCCs exhibited significantly higher Sox2 protein expression (79%) and gene amplification (72%) compared to lung adenocarcinomas (ADCs) (18% and 8%, respectively).
- Sox2 protein expression was linked to improved overall survival in SCC patients (66 vs. 14 months).
- Intense Sox2 expression was observed in SCCs with basaloid features and severe nuclear atypia.
Conclusions:
- Sox2 is a key gene in lung squamous cell carcinogenesis, particularly in driving poorly differentiated tumors.
- Sox2 status may serve as a prognostic biomarker in lung SCC.
