HFE Gene Variants Modify the Association between Maternal Lead Burden and Infant Birthweight: A Prospective Birth Cohort Study in Mexico City, Mexico

Environmental Health

Research

Brisa N Sánchez¹  David Cantonwine²  Howard Hu³  Adrienne S Ettinger⁴  Robert O Wright⁴  Adriana Mercado-García⁵  Martha Maria Téllez-Rojo⁶  Héctor Lamadrid-Figueroa⁶  Mauricio Hernández-Avila⁷ 

[1] Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan, USA;Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan, USA;Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan, USA;Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA;Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA;Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA;Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA;Division of Environmental Health, Center for Population Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico;Division of Statistics, Center for Evaluation Research and Surveys, National Institute of Public Health, Cuernavaca, Morelos, Mexico;Ministry of Health, México, Districto Federal, Mexico;

关键词: Birth Weight;    Multiple Linear Regression Model;    Iron Status;    Lead Exposure;    Blood Lead Level;   

DOI  :  10.1186/1476-069X-9-43

 received in 2010-02-12, accepted in 2010-07-26,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundNeonatal growth is a complex process involving genetic and environmental factors. Polymorphisms in the hemochromatosis (HFE) iron regulatory genes have been shown to modify transport and toxicity of lead which is known to affect birth weight.MethodsWe investigated the role of HFE C282Y, HFE H63 D, and transferrin (TF) P570 S gene variants in modifying the association of lead and infant birthweight in a cohort of Mexican mother-infant pairs. Subjects were initially recruited between 1994-1995 from three maternity hospitals in Mexico City and 411 infants/565 mothers had archived blood available for genotyping. Multiple linear regression models, stratified by either maternal/infant HFE or TF genotype and then combined with interaction terms, were constructed examining the association of lead and birthweight after controlling for covariates.Results3.1%, 16.8% and 17.5% of infants (N = 390) and 1.9%, 14.5% and 18.9% of mothers (N = 533) carried the HFE C282Y, HFE H63D, and TF P570 S variants, respectively. The presence of infant HFE H63 D variants predicted 110.3 g (95% CI -216.1, -4.6) decreases in birthweight while maternal HFE H63 D variants predicted reductions of 52.0 g (95% CI -147.3 to 43.2). Interaction models suggest that both maternal and infant HFE H63 D genotype may modify tibia lead's effect on infant birthweight in opposing ways. In our interaction models, maternal HFE H63 D variant carriers had a negative association between tibia lead and birthweight.ConclusionsThese results suggest that the HFE H63 D genotype modifies lead's effects on infant birthweight in a complex fashion that may reflect maternal-fetal interactions with respect to the metabolism and transport of metals.

【 授权许可】

CC BY   
© Cantonwine et al; licensee BioMed Central Ltd. 2010