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MR Assessment of Brain Function Altered by Lead Exposure

NCT00283647 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 150

Last updated 2015-04-14

No results posted yet for this study

Summary

Exposure to lead during pregnancy, infancy, and childhood increases the individual likelihood of impaired school performance, increased impulsiveness, aggression, and delinquent behavior. Disorders that result from exposure to environmental neurotoxicants are a complex web of interactions between genetic, neurochemical, biochemical, environmental and social factors that influence children during critical periods of development. To date, research in the area of human developmental neurotoxicology focuses primarily on global measures of sensory-motor development and cognition. However, studies elucidating the biological basis for developmental and behavioral disorders due to environmental toxicant exposure are lacking. Although gross brain structure appears normal, underlying problems exist at a neural level. Our proposal seeks to relate childhood environmental lead exposure at various levels and stages of development with detriments in brain structure and neurochemical functioning assessed with magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS). Cortical and subcortical brain volumes will be determined with high resolution MRI. Neuronal and glial cell markers will be measured using proton MRS. These structural and chemical measures will also be correlated with behavioral measures from the young adult participants of the Cincinnati Lead Study (CLS). These participants represent a unique and ideal cohort of approximately 240 subjects with detailed histories of exposure and behavioral outcomes in lead exposed children monitored for approximately 20 years. A pilot study examining language, working memory and attention in combination with functional magnetic resonance imaging (fMRI) will also be performed to better understand the functional and behavioral deficits.

Conditions

  • Lead Exposure

Sponsors & Collaborators

  • National Institute of Environmental Health Sciences (NIEHS)

    lead NIH

Principal Investigators

  • Kim M Cecil, PhD · Children's Hospital Medical Center, Cincinnati

Eligibility

Min Age
19 Years
Max Age
26 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2002-10-31
Primary Completion
2006-09-30
Completion
2006-09-30

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00283647 on ClinicalTrials.gov