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Allelotype analysis of esophageal squamous cell carcinoma
I Shibagaki1, Y Shimada, T Wagata
1Radiation Biology Center, Faculty of Medicine, Kyoto University, Japan.
Cancer Research
|June 1, 1994
Summary
This study investigated tumor suppressor genes in esophageal squamous cell carcinoma (ESCC) using allelotype analysis. Frequent loss of heterozygosity (LOH) was found on multiple chromosomes, suggesting new gene targets for ESCC beyond p53.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Esophageal squamous cell carcinoma (ESCC) tumorigenesis is linked to p53 gene mutations and allelic loss on chromosome 17p.
- The involvement of other tumor suppressor genes in ESCC progression requires further investigation.
Purpose of the Study:
- To identify additional tumor suppressor genes implicated in ESCC through comprehensive allelotype analysis.
- To correlate allelic loss patterns with clinicopathological features and patient prognosis.
Main Methods:
- Performed allelotype analysis on 36 ESCC tumors and adjacent normal tissues using 55 polymorphic DNA markers.
- Analyzed loss of heterozygosity (LOH) across autosomal arms.
- Screened for APC gene mutations in a known mutation cluster region.
Main Results:
- Frequent LOH (>30%) observed on chromosomes 3p, 5q, 6p, 8p, 9p, 9q, 11p, 13q, 17p, 17q, 18q, and 19q.
- Deletion analysis of chromosome 18q suggests a tumor suppressor gene other than DCC is involved.
- No APC gene mutations were found despite high LOH on chromosome 5q.
- LOH on chromosomes 6p and 13q correlated with poor prognosis in ESCC patients.
Conclusions:
- Multiple chromosomal regions harbor potential tumor suppressor genes crucial for ESCC development.
- The p53 pathway is critical, but other genetic alterations contribute significantly to ESCC.
- LOH on chromosomes 6p and 13q may serve as prognostic markers for ESCC.