Most solid tumors, including squamous cell carcinoma (SCC) of the oral cavity are now thought to arise through a series of histopathological stages associated with clinical progression. This progression is accompanied by a series of genetic changes which include activation of protooncogenes and loss of somatic chromosomal material associated with inactivation of tumor suppressor genes. We have developed a preliminary progression model for SCC defining several important genetic events involved in the genesis of these tumors. Highly informative microsatellite markers allowed rapid detection of loss of heterozygosity (LOH) in primary tumors and identification of critical suppressor gene loci. A more comprehensible analysis of allelic loss with microsatellite markers and directed fluorescence in situ hybridization (FISH) analysis will now be carried out to identify commonly deleted and amplified oncogene loci. Candidate genes will be tested within critically deleted regions (e.g. p16 on chromosome 9p21) in ongoing parallel studies to determine their direct involvement in the progression of these primary tumors. Knowledge of early and late genetic events will allow establishment of a molecular progression model and will provide the necessary template for the development of novel molecular screening and therapeutic strategies. Thus, the studies outlined in this proposal are aimed at developing a comprehensive genetic model of SCC progression and ultimately new transnational clinical approaches.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
5R01DE012588-04
Application #
6379839
Study Section
Oral Biology and Medicine Subcommittee 1 (OBM)
Program Officer
Shirazi, Yasaman
Project Start
1998-04-01
Project End
2003-03-31
Budget Start
2001-04-01
Budget End
2002-03-31
Support Year
4
Fiscal Year
2001
Total Cost
$384,316
Indirect Cost
Name
Johns Hopkins University
Department
Otolaryngology
Type
Schools of Medicine
DUNS #
045911138
City
Baltimore
State
MD
Country
United States
Zip Code
21218
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