Grantee Research Project Results

Endocrine Disrupting Chemicals and Thyroid Outcomes

EPA Grant Number: R830254
Title: Endocrine Disrupting Chemicals and Thyroid Outcomes
Investigators: Anderson, Henry A.
Institution: Wisconsin Department of Health and Family Services
EPA Project Officer: Chung, Serena
Project Period: March 1, 2003 through February 28, 2007 (Extended to February 28, 2009)
Project Amount: $2,288,208
RFA: Endocrine Disruptors: Epidemiologic Approaches (2001) RFA Text | Recipients Lists
Research Category: Endocrine Disruptors , Environmental Justice , Human Health , Safer Chemicals

Description:

This study will examine long-term and recent fish consumption in an existing, well-characterized cohort of 4,206 frequent and infrequent Great Lakes sport fish consumers and will expand biomonitoring from the original 538 members of the cohort to include 500 additional members. Dietary exposure to polychlorinated biphenyls (PCBs) may co-vary with exposure to related chemicals such as polybrominated diphenyl ethers (PBDEs) and dichlorodiphenyltrichloroethane (DDT). The effects of these chemicals on thyroid hormone balance will be determined and the impact of reproductive health and other potential confounding variables on these relationships characterized.

Objective:

PBDEs have recently been identified in sport fish from Lake Michigan at among the highest observed levels worldwide and may be increasing. The objective of this study is to characterize exposures to these chemicals and other relevant variables and to determine mechanisms by which PBDEs in Great Lakes fish may act separately or synergistically with PCB exposure to impair thyroid function.

Approach:

Fish consumption habits, other exposures to PBDEs and PCBs, diagnosed thyroid disease, medication use and demographic information will be assessed in the full cohort in a telephone interview. Biologic characterization of the major, endocrine disruptors known for this cohort will be conducted in 300 banked blood samples remaining from the original biologic sampling and in the newly selected 500 members. Eligibility for the new biomonitoring sample will be determined from the telephone interview. A more detailed survey and the blood and urine sampling will be conducted at field clinics. Urinary iodine, thyroid hormones, reproductive hormones, hemoglobin A1C (an index of integrated glucose concentration) and congener specific serum concentrations of PCBs, DDE and PBDEs (unadjusted and lipid adjusted) will be determined. Menstrual history and information on other potential confounds will be collected from women of reproductive age at the time of biologic specimen collection.

Expected Results:

Age-adjusted prevalence rates of diabetes and thyroid conditions will be determined in the entire cohort and compared with age-adjusted rates for this population using standard statistical techniques. Cases of disease with onset since the previous data collection (1994) will be identified and the associations with sport fish consumption and with serum PBDE, PCB and DDE concentrations examined. The impact of possible confounding variables on these associations will also be determined.

Publications and Presentations:

Publications have been submitted on this project: View all 59 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 30 journal articles for this project

Supplemental Keywords:

groundwater, human health effects, age, race, sex, diet, epidemiology, monitoring, analytical techniques., Health, RFA, Scientific Discipline, HUMAN HEALTH, POLLUTANTS/TOXICS, Health Risk Assessment, Risk Assessments, Exposure, Epidemiology, Endocrine Disruptors - Human Health, Molecular Biology/Genetics, endocrine disruptors, Biochemistry, Endocrine Disruptors - Environmental Exposure & Risk, Chemicals, dietary exposure, altered sexual development, bioavailability, hormone degradation, thyroid function, groundwater contamination, human exposure, human growth and development, pesticide exposure, chemical exposure, PCB, thyroid, exposure studies, endocrine disrupting chemicals, reproductive processes, epidemiologic studies, human health risk, agrochemicals, PCBs, biochemical research, DDT, fish, Great Lakes

Progress and Final Reports:

The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.