Journal article
Toxicity Assessment of 91-Day Repeated Inhalation Exposure to an Indoor School Air Mixture of PCBs
Environmental science & technology, Vol.56(3), pp.1780-1790
02/01/2022
DOI: 10.1021/acs.est.1c05084
PMCID: PMC9122270
PMID: 34994547
Abstract
School indoor air contaminated with polychlorinated biphenyls (PCBs) released from older building materials and paint pigments may pose health risks to children, as well as teachers and staff, by inhalation of PCBs. The health effects of long-term inhalation exposure to PCBs are poorly understood. We conducted a comprehensive toxicity assessment of 91-day repeated inhalation exposure to a lab-generated mixture of PCBs designed to emulate indoor school air, combining transcriptomics, metabolomics, and neurobehavioral outcomes. Female Sprague-Dawley rats were exposed to school air mixture (SAM+) at a concentration of 45.5 ± 5.9 μg/m
∑
PCB or filtered air 4 h/day, 6 days/week for 13 weeks using nose-only exposure systems. The congener-specific PCB body burden was quantified in major tissues using GC-MS/MS. The generated SAM+ vapor recapitulated the target school air profile with a similarity coefficient, cos θ of 0.91. PCB inhalation yielded 875-9930 ng/g ∑
PCB
levels in tissues in the following ascending order: brain < liver < lung < serum < adipose tissue. We observed that PCB exposure impaired memory, induced anxiety-like behavior, significantly reduced white blood cell counts, mildly disrupted metabolomics in plasma, and influenced transcription processes in the brain with 274 upregulated and 58 downregulated genes. With relatively high exposure and tissue loading, evidence of toxicity from half the end points tested was seen in the rats.
Details
- Title: Subtitle
- Toxicity Assessment of 91-Day Repeated Inhalation Exposure to an Indoor School Air Mixture of PCBs
- Creators
- Hui WangAndrea Adamcakova-DoddHans-Joachim LehmlerKeri C HornbucklePeter S Thorne
- Resource Type
- Journal article
- Publication Details
- Environmental science & technology, Vol.56(3), pp.1780-1790
- DOI
- 10.1021/acs.est.1c05084
- PMID
- 34994547
- PMCID
- PMC9122270
- NLM abbreviation
- Environ Sci Technol
- eISSN
- 1520-5851
- Grant note
- DOI: 10.13039/100000066, name: National Institute of Environmental Health Sciences, award: NIH P42 ES013661
- Language
- English
- Electronic publication date
- 01/07/2022
- Date published
- 02/01/2022
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health; Stead Family Department of Pediatrics; Iowa Neuroscience Institute; Iowa Superfund Research Program
- Record Identifier
- 9984209497202771
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