2003 Progress Report: Dioxins, Male Pubertal Development and Testis FunctionEPA Grant Number: R829437
Title: Dioxins, Male Pubertal Development and Testis Function
Investigators: Hauser, Russ , Korrick, Susan A. , Lasley, Bill L. , Lee, Mary , Overstreet, James W. , Revich, Boris , Sergeyev, Oleg , Williams, Paige L. , Zeilert, Vladamir
Current Investigators: Hauser, Russ , Korrick, Susan A. , Williams, Paige L.
Institution: Harvard Medical School , Chapaevsk Medical Association , Duke University Medical Center , Russian Academy of Sciences , University of California - Davis
Current Institution: Harvard T.H. Chan School of Public Health
EPA Project Officer: Hunt, Sherri
Project Period: December 1, 2001 through November 30, 2005 (Extended to February 3, 2008)
Project Period Covered by this Report: December 1, 2002 through November 30, 2003
Project Amount: $2,252,427
RFA: Endocrine Disruptors: Epidemiologic Approaches (2001) RFA Text | Recipients Lists
Research Category: Economics and Decision Sciences , Health , Safer Chemicals , Endocrine Disruptors
The objective of this research project isto determine whether exposure to dioxins, a byproduct of industrial processes and an environmental contaminant, is associated with altered growth and sexual maturation in boys. The specific objectives of this research project are to:
- explore whether physical growth is delayed and stunted;
- explore whether sexual maturation is delayed;
- and explore whether reproductive hormones are altered. Dioxin levels will be measured in blood samples drawn from the boys and their mothers.
Yearly physical examinations will be performed to assess growth velocity and onset and tempo of sexual maturation. Questionnaire data will be collected on birth and medical history, as well as lifestyle factors. Statistical modeling will be used to explore the relationship between serum levels of dioxin and altered physical growth and sexual maturation.
During the previous year, the computer databases were finalized and field tested with our Russian collaborators. The resulting database will contain more than 1,000 variables, including questions on diet, birth history, medical history, and lifestyle factors of the child and his parents. The nurse interviewing the boys and their mother will enter the data directly into the computer, avoiding delays caused by manual data entry, as well as reducing the potential for data entry errors.
We began recruitment of 8- and 9-year-old boys and their families (mothers and fathers). To date, we have recruited 180 families. Our participation rate is very high, more than 90 percent. We anticipate recruiting 320 additional boys and their families to assemble the cohort of 500 boys. Yearly followup on boys recruited this year will be performed.
We currently are performing a statistical analysis to identify predictors of serum levels of dioxins, furans, and polychlorinated biphenyls. The primary predictors of interest include: the boys’ age, distance that the boys and mothers live from the Himprom factories (a primary source of environmental dioxin contamination), and dietary intake of locally grown food (meats, dairy, and produce). We are working closely with a Russian scientist to generate geographic information system maps of the boys’/mothers’ homes in relation to the Himprom factories.
We will recruit a total of 500 8 and 9-year-old boys for a prospective cohort study. All of the boys will undergo a physical exam, have blood drawn, provide a urine sample, and complete a detailed questionnaire with their mothers. The boys’ mothers also will have blood drawn. We then will follow these boys yearly until age 18, when we can assess reproductive fitness by collecting a semen sample.
Journal Articles on this Report : 1 Displayed | Download in RIS Format
|Other project views:||All 10 publications||8 publications in selected types||All 8 journal articles|
||Lee MM, Sergeyev O, Williams P, Korrick S, Zeilert V, Revich B, Hauser R. Physical growth and sexual maturation of boys in Chapaevsk, Russia. Journal of Pediatric Endocrinology & Metabolism 2003;16(2):169-178.||