Home
Search
Study Topics
Glossary
|
|
|
|
|
Sponsored by: |
National Cancer Institute (NCI) |
---|---|
Information provided by: | National Institutes of Health Clinical Center (CC) |
ClinicalTrials.gov Identifier: | NCT00341497 |
The purpose is to determine the extent of genetic damage in oral mucosal lesions ascertained in the study, whether specific genotypes are associated with genetic damage observed in the oral mucosal lesions, whether the extent of genetic damage changes over time, and what factors (e.g. smoking) contribute to those changes. Genetic damage indicators will include among others DNA adduct formation, particularly related to tobacco smoke carcinogens such as polycyclic aromatic hydocarbons. The genotypes of interest will be focused on these affecting carcinogen metabolism, (e.g., (CYP family), but may also include those related to growth factors, cell cycle control, and DNA repair. Microsatellite instability is another key indicator of damage that we plan to examine. This study was undertaken due to the paucity of data on the types of oral lesions seen in general dental practice and the limited knowledge of the natural history of these lesions.
Persons were enrolled who had red and/or white oral lesions identified at 6 Dental Clinics at VA Medical Centers.
The VA Centers involved were: Washington, DC; Atlanta, GA; Durham, NC; San Francisco, CA; Danville, IL; and San Antonio, TX.
When a dentist found a red or white lesions in the course of routine outpatient examinations and care, obvious causes such as denture frictional lesions could be ruled out, and the normal standard of care for the lesion was biopsy, the patient was considered for enrollment into the study. The study was described to the patient, the consent for was signed, the patient received an intraoral examination to identify and characterize the oral lesions, the lesions were photographed, an oral epithelial cell sample was taken from the site and from the rest of the oral mucosa, and the patient was interviewed using a standard questionnaire that requested information about sociodemograhic, medical, and lifestyle factors, particularly tobacco and alcohol use all as part of the study protocol, and the patient received a biopsy as part of normal care. The biopsy report was obtained as was a small piece of the biopsy material that was not needed for patient diagnostic purposes. The subjects returned every 4-6 months for reassessment of the lesion or to determine that the lesion had not returned. The patients completed a questionnaire at each of these visits so that lifestyle factors such as tobacco and alcohol use could be reassessed. Also oral epithelial cell scrapings were obtained at each of these visits.
This study is particularly valuable because longitudinal data was collected and because the data were collected over time using standard procedures.
Condition |
---|
Oral Cancer |
Study Type: | Observational |
Official Title: | Biomarkers for Oral Cancer |
Estimated Enrollment: | 250 |
Study Start Date: | August 1996 |
Primary Completion Date: | October 2006 (Final data collection date for primary outcome measure) |
The Biomarkers for Oral Cancer study was undertaken to better understand the role of genetic and lifestyle factors in the natural history of these oral premalignant lesions. The purpose of this study is to determine the extent of genetic damage in oral mucosal lesions ascertained in the study, whether specific genotypes are associated with genetic damage observed in the oral mucosal lesions, whether the extent of genetic damage changes over time, and what factors (e.g. smoking) contribute to those changes. This study is particularly valuable because longitudinal data was collected over time using standardized procedures.
Persons were enrolled in the study who had red and/or white oral lesions identified at 6 Dental Clinics at VA Medical Centers. When a dentist found a red or white lesion in the course of routine outpatient examinations and care, obvious causes such as denture frictional lesions could be ruled out, and when the normal standard of care for the lesion was biopsy, the patient was considered for enrollment into the study. The study was described to the patient, the consent form was signed, the patient received an intraoral examination to identify and characterize the oral lesions, the lesions were photographed, an oral epithelial cell sample was taken from the site and from the rest of the oral mucosa, and the patient was interviewed using a standard questionnaire that requested information about sociodemographic, medical, and lifestyle factors, particularly tobacco and alcohol use all as part of the study protocol. The patient's lesion was biopsied as part of his normal care. The biopsy report was obtained, as was a small piece of the biopsy material that was not needed for patient diagnostic purposes. The subjects returned every 4-6 months for reassessment of the lesion or to determine that the lesion had not returned. The patients completed a questionnaire at each of these visits so that lifestyle factors such as tobacco and alcohol use could be reassessed. Also, oral epithelial cell scrapings were obtained at each of these visits.
Analysis is focusing on the loss of heterozygosity and microsatellite instability as indicators of genetic damage and the relationship of damage to smoking and genotypes as well as how well findings from the oral rinses and brushes correspond to those in lesion tissues.
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Patients with white, red, or white and red lesions in the oral cavity and oropharynx as identified by the participating dentist.
United States, California | |
U.C.S.F./ Vterans Affairs Medical Center | |
San Francisco, California, United States, 94143 | |
United States, District of Columbia | |
VA Medical Center, Washington D.C. | |
Washington, District of Columbia, United States, 20422 | |
United States, Georgia | |
Emory University | |
Atlanta, Georgia, United States, 30322-1102 | |
United States, Illinois | |
Veterans Affairs, Danville | |
Danville, Illinois, United States | |
United States, North Carolina | |
VA Medical Center, Durham | |
Durham, North Carolina, United States | |
United States, Texas | |
Veterans Affairs, San Antonio | |
San Antonio, Texas, United States |
Study ID Numbers: | 999998040, OH98-D-N040 |
Study First Received: | June 19, 2006 |
Last Updated: | August 28, 2009 |
ClinicalTrials.gov Identifier: | NCT00341497 History of Changes |
Health Authority: | United States: Federal Government |
Leukoplakia Molecular Markers Histopathology Epidemiology Veterans |
Lip and Oral Cavity Cancer Mouth Diseases Head and Neck Neoplasms Leukoplakia |
Stomatognathic Diseases Mouth Neoplasms Oral Cancer |
Mouth Diseases Neoplasms Neoplasms by Site |
Head and Neck Neoplasms Stomatognathic Diseases Mouth Neoplasms |