Peripubertal serum dioxin concentrations and subsequent sperm methylome profiles of young Russian adults.
Reprod Toxicol 2018;
78:40-49. [PMID:
29550351 PMCID:
PMC6130911 DOI:
10.1016/j.reprotox.2018.03.007]
[Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 03/04/2018] [Accepted: 03/13/2018] [Indexed: 01/22/2023]
Abstract
BACKGROUND
The association of exposure to endocrine disrupting chemicals in the peripubertal period with subsequent sperm DNA methylation is unknown.
OBJECTIVE
We examined the association of peripubertal serum 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) concentrations with whole-genome bisulfite sequencing (WGBS) of sperm collected in young adulthood.
METHODS
The Russian Children's Study is a prospective cohort of 516 boys who were enrolled at 8-9 years of age and provided semen samples at 18-19 years of age. WGBS of sperm was conducted to identify differentially methylated regions (DMR) between highest (n = 4) and lowest (n = 4) peripubertal TCDD groups.
RESULTS
We found 52 DMRs that distinguished lowest and highest peripubertal serum TCDD concentrations. One of the top scoring networks, "Cellular Assembly and Organization, Cellular Function and Maintenance, Carbohydrate Metabolism", identified estrogen receptor alpha as its central regulator.
CONCLUSION
Findings from our limited sample size suggest that peripubertal environmental exposures are associated with sperm DNA methylation in young adults.
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