Organochlorines such as DDT, its metabolite DDE, and polychlorinated biphenyls (PCBs) are persistent organic pollutants that may be toxic at levels encountered by the general population, through exposure in the food chain. Each organochlorine has one or more types of biologic activity, and corresponding potential mechanisms of action. Most of my work in this area is based on analysis of serum from pregnant women who were in a cohort study named the Collaborative Perinatal Project (CPP). Here I describe some of my results from the CPP study. Results from other studies I have done on the health effects of persistent organic pollutants are indicated in the list of publications. Sera from over 50,000 pregnant women in the CPP have been frozen at -20 degrees Centigrade since 1959-1965, and with the health data on their offspring constitute a resource that is still actively used by many investigators. We selected a subset of about 2,800 children born in 1959-1966 and determined organochlorine concentrations in the corresponding stored maternal pregnancy sera, in 1997-1999. In earlier CPP papers we examined DDE levels in relation to fetal loss in previous pregnancies, and, in the CPP pregnancy, preterm birth, small-for-gestational-age, birthweight, and subsequent height;in all cases we found associations suggestive of adverse effects. To look for evidence of androgen-blocking, we examined maternal DDE level during pregnancy in relation to adjusted odds of cryptorchidism and hypospadias among their male offspring;for these outcomes the results were equivocal. Furthermore, we evaluated prenatal PCB exposure in relation to developmental assessment performance at 8 months of age, 7 years of age, and hearing as reflected by audiometric examination at age 8 years. We also examined exposure to DDT and DDE in relation to IQ at age 7 years. None of these studies showed any associations. Last year's progress A project to investigate the role or organochlorines in the etiology of preeclampsia was nearly completed and the manuscript is in preparation. An investigation of organochlorines as obesogens was published.

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Savitz, David A; Klebanoff, Mark A; Wellenius, Gregory A et al. (2014) Persistent organochlorines and hypertensive disorders of pregnancy. Environ Res 132:1-5
Lehmann, Geniece M; Verner, Marc-André; Luukinen, Bryan et al. (2014) Improving the risk assessment of lipophilic persistent environmental chemicals in breast milk. Crit Rev Toxicol 44:600-17
Ouyang, Fengxiu; Longnecker, Matthew P; Venners, Scott A et al. (2014) Preconception serum 1,1,1-trichloro-2,2,bis(p-chlorophenyl)ethane and B-vitamin status: independent and joint effects on women's reproductive outcomes. Am J Clin Nutr 100:1470-8
Verner, Marc-André; McDougall, Robin; Glynn, Anders et al. (2013) Is the relationship between prenatal exposure to PCB-153 and decreased birth weight attributable to pharmacokinetics? Environ Health Perspect 121:1219-24
Li, Daniel; Longnecker, Matthew P; Dunson, David B (2013) Lipid adjustment for chemical exposures: accounting for concomitant variables. Epidemiology 24:921-8
Cupul-Uicab, Lea A; Klebanoff, Mark A; Brock, John W et al. (2013) Prenatal exposure to persistent organochlorines and childhood obesity in the US collaborative perinatal project. Environ Health Perspect 121:1103-9
Jusko, Todd A; Sonneborn, Dean; Palkovicova, Lubica et al. (2012) Pre- and postnatal polychlorinated biphenyl concentrations and longitudinal measures of thymus volume in infants. Environ Health Perspect 120:595-600
Jusko, Todd A; Klebanoff, Mark A; Brock, John W et al. (2012) In-utero exposure to dichlorodiphenyltrichloroethane and cognitive development among infants and school-aged children. Epidemiology 23:689-98
Trabert, Britton; Longnecker, Matthew P; Brock, John W et al. (2012) Maternal pregnancy levels of trans-nonachlor and oxychlordane and prevalence of cryptorchidism and hypospadias in boys. Environ Health Perspect 120:478-82
Trnovec, Tomas; Dedik, Ladislav; Jusko, Todd A et al. (2011) Assessment of exposure to PCB 153 from breast feeding and normal food intake in individual children using a system approach model. Chemosphere 85:1687-93

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