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Biomarkers of Benzene Exposure in Inner City Residents
This study is currently recruiting patients.
Sponsored by: | National Institute of Environmental Health Sciences (NIEHS) Mickey Leland National Urban Air Toxics Research Center
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Information provided by: | National Institute of Environmental Health Sciences (NIEHS) |
Purpose
This study compares air pollution exposures of residents in a South Baltimore community next to major industry with those in a comparison community with much less industry nearby. Parents and children as well as adults alone will be included. Air levels of 3 chemicals that have been found in increased amounts in the community as well as two urinary breakdown products of benzene will be measured. Participants will limit the amount of sorbate preserved foods they eat as this preservative interferes with one of the benzene breakdown products. Benzene air and urine exposure measurements will be compared in each community as well as between communities. By including children and parents we will gather exposure information on children who may be more sensitive that adults to these types of pollution. Lastly, by restricting the amount of food preserved with sorbates, we can decide if this improves the use of ttMA for people exposed to benzene from air pollution.
Condition |
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Lung Disease Cancer |
MedlinePlus related topics: Cancer; Cancer Alternative Therapy; Respiratory Diseases
Study Type: Observational
Study Design: Screening, Cross-Sectional, Random Sample
Expected Total Enrollment: 90
The current study focuses on an environmental exposure assessment of a South Baltimore community residing near a heavily industrialized area. Exposure differences between this community and a reference community that is demographically similar to South Baltimore but has limited industrial impact will be assessed. Participants will include both parent child study pairs and adults. Outdoor, indoor and personal 72 hour badge monitoring for benzene, 1,3-butadiene and carbon tetrachloride will be performed. Two urinary biomarkers for benzene exposure, trans,trans-muconic acid (ttMA) and s-phenylmercapturic acid (S-PMA) will be measured at 3 daily time points over the 3 day period. Past work indicates that ingestion of sorbate preserved foods causes substantial interference with the benzene biomarker, ttMA. Therefore, participants will restrict their intake of sorbate preserved foods during the study. On the day of greatest dietary restriction, a 24 hour benzene personal air measurement will be obtained. Data analysis will include correlations of benzene badge exposure measurements and urinary biomarkers. Air and biomarker benzene exposure data will be compared between communities. Linear regression modeling will be used to determine important explanatory factors of the biomarkers. The inclusion of parent child study pairs will also allow correlation of benzene air levels and urinary biomarkers between parents and children. This will provide exposure information on a potentially susceptible subpopulation, e.g. children, and allow assessment of potential for age-related differences in benzene metabolism. Finally, we will be able to determine if dietary restriction is practical and results in greater specificity of ttMA as a benzene biomarker.
Eligibility
Ages Eligible for Study: 3 Years and above, Genders Eligible for Study: Both
Accepts Healthy Volunteers
Criteria
Location and Contact Information
More Information
Publications
U.S. National Library of Medicine, Contact NLM Customer Service | ||||||||||||||
National Institutes of Health, Department of Health & Human Services | ||||||||||||||
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