Perfluorooctanoic acid (PFOA) or perfluorooctane sulfonate (PFOS) and DNA methylation in newborn dried blood spots in the Upstate KIDS cohort

Sonia L. Robinson, Xuehuo Zeng, Weihua Guan, Rajeshwari Sundaram, Pauline Mendola, Diane L. Putnick, Robert A. Waterland, Chathura J. Gunasekara, Kurunthachalam Kannan, Chongjing Gao, Erin M. Bell, Edwina H. Yeung

Research output: Contribution to journalArticlepeer-review

Abstract

Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are persistent organic pollutants which may alter prenatal development, potentially through epigenetic modifications. Prior studies examining PFOS/PFOA and DNA methylation have relatively few subjects (n < 200) and inconsistent results. We examined relations of PFOA/PFOS with DNA methylation among 597 neonates in the Upstate KIDS cohort study. PFOA/PFOS were quantified in newborn dried blood spots (DBS) using high-performance liquid chromatography/tandem mass spectrometry. DNA methylation was measured using the Infinium MethylationEPIC BeadChip with DNA extracted from DBS. Robust linear regression was used to examine the associations of PFOA/PFOS with DNA methylation at individual CpG sites. Covariates included sample plate, estimated cell type, epigenetically derived ancestry, infant sex and plurality, indicators of maternal socioeconomic status, and prior pregnancy loss. In supplemental analysis, we restricted the analysis to 2242 CpG sites previously identified as Correlated Regions of Systemic Interindividual Variation (CoRSIVs) which include metastable epialleles. At FDR<0.05, PFOA concentration >90th percentile was related to DNA methylation at cg15557840, near SCRT2, SRXN1; PFOS>90th percentile was related to 2 CpG sites in a sex-specific manner (cg19039925 in GVIN1 in boys and cg05754408 in ZNF26 in girls). When analysis was restricted to CoRSIVs, log-scaled, continuous PFOS concentration was related to DNA methylation at cg03278866 within PTBP1. In conclusion, there was limited evidence of an association between high concentrations of PFOA/PFOS and DNA methylation in newborn DBS in the Upstate KIDS cohort. These findings merit replication in populations with a higher median concentration of PFOA/PFOS.

Original languageEnglish (US)
Article number110668
JournalEnvironmental Research
Volume194
DOIs
StatePublished - Mar 2021

Bibliographical note

Funding Information:
This work was supported by the Intramural Research Program of the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD; contracts #HHSN275201200005C, #HHSN267200700019C, #HHSN275201400013C, #HHSN275201300026I/27500004, #HHSN275201300023I/27500017). Although the paper was cleared for publication by NICHD/NIH, the sponsor played no role in the study design, data collection, data analysis or interpretation, writing of the manuscript, or the decision to submit the article for publication.

Funding Information:
This work was supported by the Intramural Research Program of the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD; contracts #HHSN275201200005C, #HHSN267200700019C, #HHSN275201400013C, #HHSN275201300026I/27500004, #HHSN275201300023I/27500017). Although the paper was cleared for publication by NICHD / NIH , the sponsor played no role in the study design, data collection, data analysis or interpretation, writing of the manuscript, or the decision to submit the article for publication.

Publisher Copyright:
© 2020

Keywords

  • Developmental origins of health and disease (DoHaD)
  • Mother-child dyads
  • Newborn dried blood spots
  • Persistent organic pollutants

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