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Environmental Public Health

2009

Epigenetics

Articles 1 - 2 of 2

Full-Text Articles in Medicine and Health Sciences

Influence Of Prenatal Lead Exposure On Genomic Methylation Of Cord Blood Dna, Richard J. Pilsner, Howard Hu, Adrienne Ettinger, Brisa N. Sánchez, Robert O. Wright, David Cantonwine, Alicia Lazarus, Héctor Lamadrid-Figueroa, Adriana Mercado-García, Martha Maria Téllez-Rojo, Mauricio Hernández-Avila Aug 2009

Influence Of Prenatal Lead Exposure On Genomic Methylation Of Cord Blood Dna, Richard J. Pilsner, Howard Hu, Adrienne Ettinger, Brisa N. Sánchez, Robert O. Wright, David Cantonwine, Alicia Lazarus, Héctor Lamadrid-Figueroa, Adriana Mercado-García, Martha Maria Téllez-Rojo, Mauricio Hernández-Avila

J. Richard Pilsner

Background

Fetal lead exposure is associated with adverse pregnancy outcomes and developmental and cognitive deficits; however, the mechanism(s) by which lead-induced toxicity occurs remains unknown. Epigenetic fetal programming via DNA methylation may provide a pathway by which environmental lead exposure can influence disease susceptibility.

Objective

This study was designed to determine whether prenatal lead exposure is associated with alterations in genomic methylation of leukocyte DNA levels from umbilical cord samples.

Methods

We measured genomic DNA methylation, as assessed by Alu and LINE-1 (long interspersed nuclear element-1) methylation via pyrosequencing, on 103 umbilical cord blood samples from the biorepository of the …


Folate Deficiency, Hyperhomocysteinemia, Low Urinary Creatinine, And Hypomethylation Of Leukocyte Dna Are Risk Factors For Arsenic-Induced Skin Lesions, Richard Pilsner, Xinhua Liu, Habibul Ahsan, Vesna Ilievski, Vesna Slavkovich, Diane Levy, Pam Factor-Litvak, Joseph Graziano, Mary Gamble Feb 2009

Folate Deficiency, Hyperhomocysteinemia, Low Urinary Creatinine, And Hypomethylation Of Leukocyte Dna Are Risk Factors For Arsenic-Induced Skin Lesions, Richard Pilsner, Xinhua Liu, Habibul Ahsan, Vesna Ilievski, Vesna Slavkovich, Diane Levy, Pam Factor-Litvak, Joseph Graziano, Mary Gamble

J. Richard Pilsner

Background

Arsenic methylation relies on folate-dependent one-carbon metabolism and facilitates urinary As elimination. Clinical manifestations of As toxicity vary considerably among individuals and populations, and poor methylation capacity is thought to confer greater susceptibility.

Objective

After determining that folate deficiency, hyperhomocysteinemia, and low urinary creatinine are associated with reduced As methylation, and that As exposure is associated with increased genomic methylation of leukocyte DNA, we asked whether these factors are associated with As-induced skin lesion risk among Bangladeshi adults.

Methods

We conducted a nested case–control study of 274 cases who developed lesions 2 years after recruitment, and 274 controls matched …