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Assessing environmental exposure in children: immunotoxicology screening
1Immunochemistry Laboratory, The George Washington University Medical Center, Washington, Distric of Columbia, USA. phillipt@ors.od.nih.gov
Journal of Exposure Analysis and Environmental Epidemiology
|January 4, 2001
Summary
Environmental pesticide exposure significantly impacts children's immune systems, causing inflammation and immune dysregulation. This study highlights concerning effects on cytokine profiles and host resistance in exposed children.
Area of Science:
- Environmental health
- Immunology
- Pediatrics
Background:
- Environmental xenobiotics, such as pesticides, pose risks to children's immune systems.
- Immune system dysfunction can increase susceptibility to infections and other diseases.
Purpose of the Study:
- To assess immune system function in children with documented residential pesticide exposure.
- To investigate the effects of pesticide exposure on cytokine profiles.
Main Methods:
- Development of a recycling chromatographic system for human cytokine profiling.
- Measurement of 30 different analytes in single samples to assess immune markers.
- Examination of a cohort of 25 children with documented pesticide exposure.
Main Results:
- Abnormalities in cytokines related to hematopoiesis were observed in all exposed subjects.
- Elevated pro-inflammatory cytokines and neuropeptides indicated generalized and neurogenic inflammation.
- A subgroup showed a depressed cellular immune system, correlating with reduced resistance to infection.
- All exposed children exhibited hyperstimulation of the humoral immune system, evidenced by elevated IL-5 and clinical allergy.
Conclusions:
- Residential pesticide exposure leads to marked immune dysregulation in children.
- Findings indicate significant impacts on both innate and adaptive immunity.
- The developed chromatographic system effectively measures immune function in exposed populations.