Exposure to Perfluoroalkyl Substances and Sperm DNA Global Methylation in Arctic and European Populations

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Perfluoroalkyl substances (PFASs) are widely used in a variety of industrial processes and products, and have been detected globally in humans and wildlife. PFASs are suspected to interfere with endocrine signaling and to adversely affect human reproductive health. The aim of the present study was to investigate the associations between exposure to PFASs and sperm global methylation levels in a population of non-occupationally exposed fertile men. Measurements of PFASs in serum from 262 partners of pregnant women from Greenland, Poland and Ukraine, were also carried out by liquid chromatography tandem mass spectrometry. Perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), perfluorohexane sulfonic acid (PFHxS), and perfluorononanoic acid (PFNA) were detected in 97% of the blood samples. Two surrogate markers were used to assess DNA global methylation levels in semen samples from the same men: (a) average DNA methylation level in repetitive DNA sequences (Alu, LINE-1, Sat alpha) quantified by PCR-pyrosequencing after bisulfite conversion; (b) flow cytometric immunodetection of 5-methyl-cytosines. After multivariate linear regression analysis, no major consistent associations between PFASs exposure and sperm DNA global methylation endpoints could be detected. However, since weak but statistically significant associations of different PFASs with DNA hypo- and hypermethylation were found in some of the studied populations, effects of PFASs on sperm epigenetic processes cannot be completely excluded, and this issue warrants further investigation. (C) 2014 Wiley Periodicals, Inc.

Detaljer

Författare
  • Giorgio Leter
  • Claudia Consales
  • Patrizia Eleuteri
  • Raffaella Uccelli
  • Ina O. Specht
  • Gunnar Toft
  • Tania Moccia
  • Alfredo Budillon
  • Bo A Jönsson
  • Christian Lindh
  • Aleksander Giwercman
  • Henning S. Pedersen
  • Jan K. Ludwicki
  • Valentyna Zviezdai
  • Dick Heederik
  • Jens Peter E. Bonde
  • Marcello Spano
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Reproduktionsmedicin och gynekologi
  • Miljömedicin och yrkesmedicin

Nyckelord

Originalspråkengelska
Sidor (från-till)591-600
TidskriftEnvironmental and Molecular Mutagenesis
Volym55
Utgivningsnummer7
StatusPublished - 2014
PublikationskategoriForskning
Peer review utfördJa