Project 4: Abstract Project 4, a biomedical project, is an integral component of the Dartmouth Superfund Research Program. Over the past 18 years, we designed and tested methods of measuring environmentally relevant levels of exposure to metals and applied novel biomarkers of exposure, susceptibility, and early response to large- scaled, population-based epidemiologic studies in the US. To date, we have tested over 8,000 households for arsenic (As), of which over 3,500 had private water systems. A GIS analysis of the data (performed in collaboration with the Trace Element Analysis Core) revealed distinct "clusters" of high household water As levels. Over the past five years, we successfully established a pregnancy cohort of women who use private wells in one of these cluster regions. Of the household tap water samples tested thus far, ~15% exceeded the maximum contaminant level for As established by the US EPA of 10 ?g/L. Over the next five years, we will begin recruitment in another cluster region that is adjacent to planned and existing Superfund sites. While evidence suggests that As is related to adult onset diabetes and hypertension, its effects on these outcomes during pregnancy are uncertain. Thus, we will determine whether As influences glucose and blood pressure control during pregnancy and identify potential genetic susceptibility loci for these effects. Additionally, we will test pregnant women and newborns for markers of systemic inflammation and vascular endothelial dysfunction that have been previously found to relate to As exposure among adults in more highly exposed regions. Our hypothesis is that pregnancy and fetal development represent "windows" of susceptibility to the effects of As on cardiometabolic outcomes. To our knowledge, our study is one of the only molecular epidemiologic investigations of pregnancy and early life exposure to As in vulnerable subgroups of the general population of the US. Cardiovascular disease is the leading cause of morbidity and mortality worldwide, and the risk for this disease begins early in life. Thus, we are now positioned to capitalize upon our work in the previous grant period to fill critical gaps in our understanding of the lifelong health impacts of early life exposure to As, one of the leading environmental chemicals of concern.

Public Health Relevance

Project 4: Narrative Emerging data indicate that exposure to relatively low levels of arsenic during pregnancy may adversely affect both the mother and her offspring. By extending our US pregnancy cohort of women potentially exposed to arsenic through their drinking water and diet, we will gain a better understanding of these effects, and inform policies and strategies for remediation.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Hazardous Substances Basic Research Grants Program (NIEHS) (P42)
Project #
3P42ES007373-19A1S1
Application #
8881880
Study Section
Special Emphasis Panel (ZES1-LKB-K)
Project Start
2014-07-01
Project End
2015-03-31
Budget Start
2014-07-01
Budget End
2015-03-31
Support Year
19
Fiscal Year
2014
Total Cost
$1,199
Indirect Cost
$88
Name
Dartmouth College
Department
Type
DUNS #
041027822
City
Hanover
State
NH
Country
United States
Zip Code
03755
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