The proposed research addresses the broad SRP theme of Detection Research and more specifically the development of passive samplers for multi-chemical detection and determination of the degree of bioavailability in water and sediment.
Aim 1 will develop a universal passive sampling device (PSD) for measuring the time-weighted-average chronic exposure to hundreds of organic chemicals in water. We will advance the theory, design, and application of PSDs to a very broad range of physico-chemical properties (e.g., KOW = 0-9) so that nearly every organic chemical on the Superfund Priority List of Chemicals, and many of their metabolites, will be sampled by a single PSD. We hypothesize that a mixed-polymer sorptive phase contained within a non-selective and highly porous membrane will allow linear uptake of nearly all organic chemicals.
Aim 2 will establish the use of PSDs to measure the bioavailable fraction of PCBs and PCB metabolites in water, sediment, and soil. We will conduct laboratory bioavailability experiments with PCB-contaminated soil, sediment and water to advance our understanding of the mechanisms controlling PCB bioavailability and perform field verification at NPL sites. In collaboration with Project 1, we will use extracts of our samples to determine the relationship of our bioavailability measure to the dioxin toxic equivalency factor response in Project 1 cell assays.
Aim 3 will establish the use of PSDs to measure the bioavailable fraction of PAHs and PAH metabolites in water, sediment, and soil. In collaboration with Project 5, we will perform studies very similar to those in Aim 2 to develop the use of PSDs to measure PAH and PAH metabolite bioavailability under both controlled laboratory conditions and at NPL sites. This work will advance our understanding of and ability to measure the partitioning of PAHs and metabolites among dissolved organic carbon, soft and hard (soot) particulate carbon, weathered oil/oil product phases, and biota. We hypothesize that our novel PSD design will provide an accurate measure of bioavailable chronic exposure under a broad range of conditions and that PSD-derived data will overcome a critical barrier to more accurate estimates of bioavailability and risk.

Public Health Relevance

The proposed research addresses the broad SRP theme of Detection Research and more specifically the development of passive samplers for multi-chemical detection and determination of the degree of bioavailability in water and sediment. We will study over 100 of the chemicals on the CERCLA Priority List of chemicals and perform field validation studies at several NPL sites.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Hazardous Substances Basic Research Grants Program (NIEHS) (P42)
Project #
5P42ES005948-20
Application #
8450236
Study Section
Special Emphasis Panel (ZES1-LWJ-V)
Project Start
Project End
Budget Start
2013-04-01
Budget End
2014-03-31
Support Year
20
Fiscal Year
2013
Total Cost
$312,103
Indirect Cost
$2,931
Name
University of North Carolina Chapel Hill
Department
Type
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Luo, Yu-Syuan; Furuya, Shinji; Soldatov, Valerie Y et al. (2018) Metabolism and Toxicity of Trichloroethylene and Tetrachloroethylene in Cytochrome P450 2E1 Knockout and Humanized Transgenic Mice. Toxicol Sci 164:489-500
Balik-Meisner, Michele; Truong, Lisa; Scholl, Elizabeth H et al. (2018) Elucidating Gene-by-Environment Interactions Associated with Differential Susceptibility to Chemical Exposure. Environ Health Perspect 126:067010
To, Kimberly T; Fry, Rebecca C; Reif, David M (2018) Characterizing the effects of missing data and evaluating imputation methods for chemical prioritization applications using ToxPi. BioData Min 11:10
Dalaijamts, Chimeddulam; Cichocki, Joseph A; Luo, Yu-Syuan et al. (2018) Incorporation of the glutathione conjugation pathway in an updated physiologically-based pharmacokinetic model for perchloroethylene in mice. Toxicol Appl Pharmacol 352:142-152
Gray, Kathleen M (2018) From Content Knowledge to Community Change: A Review of Representations of Environmental Health Literacy. Int J Environ Res Public Health 15:
Li, Gen; Jima, Dereje; Wright, Fred A et al. (2018) HT-eQTL: integrative expression quantitative trait loci analysis in a large number of human tissues. BMC Bioinformatics 19:95
Adebambo, Oluwadamilare A; Shea, Damian; Fry, Rebecca C (2018) Cadmium disrupts signaling of the hypoxia-inducible (HIF) and transforming growth factor (TGF-?) pathways in placental JEG-3 trophoblast cells via reactive oxygen species. Toxicol Appl Pharmacol 342:108-115
Smeester, Lisa; Fry, Rebecca C (2018) Long-Term Health Effects and Underlying Biological Mechanisms of Developmental Exposure to Arsenic. Curr Environ Health Rep 5:134-144
Luo, Yu-Syuan; Furuya, Shinji; Chiu, Weihsueh et al. (2018) Characterization of inter-tissue and inter-strain variability of TCE glutathione conjugation metabolites DCVG, DCVC, and NAcDCVC in the mouse. J Toxicol Environ Health A 81:37-52
Singleton, David R; Lee, Janice; Dickey, Allison N et al. (2018) Polyphasic characterization of four soil-derived phenanthrene-degrading Acidovorax strains and proposal of Acidovorax carolinensis sp. nov. Syst Appl Microbiol 41:460-472

Showing the most recent 10 out of 505 publications