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Sponsors and Collaborators: |
National Institute of Environmental Health Sciences (NIEHS) University of California, Davis University of California, Los Angeles |
Information provided by: | National Institute of Environmental Health Sciences (NIEHS) |
ClinicalTrials.gov Identifier: | NCT00106652 |
The purpose of this study is to understand how genes, environment, and the interplay between the two, influences the development of autism and other neurodevelopmental disorders.
Condition |
Autism Developmental Disabilities |
MedlinePlus related topics: | Autism Developmental Disabilities |
Study Type: | Observational |
Study Design: | Screening, Cross-Sectional, Case Control, Retrospective/Prospective Study |
Official Title: | Environmental Factors in the Etiology of Autism |
Estimated Enrollment: | 2000 |
Study Start Date: | September 2001 |
Estimated Study Completion Date: | September 2006 |
The causes and contributing factors for autism are poorly understood. Evidence suggests that incidence is increasing, but diagnostic changes and improvements may be playing a role. Both genetic and environmental factors appear to play a role. Autopsy studies demonstrate structural changes in the brain and clinical investigations reveal neurophysiologic differences in information processing in autistic versus normal children. Members of our team recently demonstrated altered levels of certain neuropeptides at birth in children who later developed autism.
This case-control study is the first large-scale epidemiologic investigation of underlying causes for autism and triggers of regression. This study capitalizes on the strengths of the case-control design, which is well suited to examine a broad array of factors for rare conditions that are thought to be multifactorial. Comparisons will be made with both general population controls and mentally retarded children.
The aims are to assess the influence of exogenous exposures, the role of susceptibility factors, and the interplay between these two in the etiology of autism and its phenotypic variation. Chemicals with known or suspected neurodevelopmental toxicity, such as PCB’s, certain pesticides, and metals, are being investigated. This study pursues several hypotheses that have recently gained attention, including the combined measles, mumps, rubella vaccine and mercury present in vaccines given during infancy and early childhood. Additionally, biochemical susceptibility is examined through characterization of metabolic, immunologic, and neuronal gene expression profiles and genetic polymorphisms.
Ages Eligible for Study: | 24 Months to 60 Months |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
Exclusion Criteria:
Contact: Melissa Rose, B.Sci. | (530) 754-8157 | mbrose@ucdavis.edu |
United States, California | |||||
University of California | Recruiting | ||||
Davis, California, United States, 95616 | |||||
Contact: Melissa Rose, B.Sci. 530-754-8157 mbrose@ucdavis.edu | |||||
Principal Investigator: Irva Hertz-Picciotto, MPH, PhD |
National Institute of Environmental Health Sciences (NIEHS) |
University of California, Davis |
University of California, Los Angeles |
Principal Investigator: | Isaac N. Pessah, Ph.D. | University of California, Davis |
Study Director: | Irva Hertz-Picciotto, Ph.D. | University of California, Davis |
Study ID Numbers: | 11269-CP-001, 200210574-4 |
First Received: | March 28, 2005 |
Last Updated: | June 23, 2005 |
ClinicalTrials.gov Identifier: | NCT00106652 |
Health Authority: | United States: Federal Government |
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