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Transcript map of the 8p23 putative tumor suppressor region
P C Sun1, R Uppaluri, A P Schmidt
1Department of Otolaryngology, Head and Neck Surgery, Washington University School of Medicine, 517 South Euclid Avenue, St. Louis, Missouri 63110, USA.
Genomics
|July 27, 2001
Summary
The CUB and sushi multiple domains-1 (CSMD1) gene is a potential suppressor for head and neck, prostate, liver, and bladder cancers. Its expression in normal tissues and conservation across species suggest a broad tumor-suppressive role.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- Specific chromosomal regions, particularly band 8p23, show deletions across various cancers including head and neck, prostate, liver, and bladder.
- Previous research identified a 112-kb minimal deletion region within 8p23 in squamous cell carcinomas.
Purpose of the Study:
- To identify a candidate tumor suppressor gene within the 8p23 deletion region.
- To investigate the role of the CUB and sushi multiple domains-1 (CSMD1) gene as a potential suppressor across multiple cancer types.
Main Methods:
- Refinement of minimal deletion regions in cancer genomes.
- Analysis of gene expression using RT-PCR and EST data.
- Comparative sequence and protein organization analysis between human and mouse CSMD1.
Main Results:
- A single gene, CUB and sushi multiple domains-1 (CSMD1), was identified within the refined 8p23 deletion region and is expressed in normal upper aerodigestive tract epithelium.
- CSMD1 expression was also detected in the liver and prostate, indicating its presence in organs affected by 8p23 deletions.
- The gene sequence and protein structure of CSMD1 are highly conserved between humans and mice.
Conclusions:
- CSMD1 is a strong candidate for a tumor suppressor gene involved in squamous cell carcinomas.
- The expression pattern and conservation suggest CSMD1 may function as a suppressor in multiple cancer types beyond head and neck cancers.
- Further research into CSMD1's function is warranted to explore its therapeutic potential in various malignancies.