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Peripherally administered persistent organic pollutants distribute to the brain of developing chicken embryo in concentrations relevant for human exposure.

Authors :
Yadav A
Verhaegen S
Hadera MG
Berntsen HF
Berg V
Lyche JL
Sabaredzovic A
Haug LS
Myhre O
Zimmer KE
Paulsen RE
Ropstad E
Boix F
Source :
Neurotoxicology [Neurotoxicology] 2022 Jan; Vol. 88, pp. 79-87. Date of Electronic Publication: 2021 Oct 29.
Publication Year :
2022

Abstract

Persistent organic pollutants (POPs) can reach the fetal brain and contribute to developmental neurotoxicity. To explore the distribution of POPs to the fetal brain, we exposed chicken embryos to a POP mixture, containing 29 different compounds with concentrations based on blood levels measured in the Scandinavian human population. The mixture was injected into the allantois at embryonic day 13 (E13), aiming at a theoretical concentration of 10 times human blood levels. POPs concentrations in the brain were measured at 0.5, 1, 2, 4, 6, 24, 48, and 72 h after administration. Twenty-seven of the individual compounds were detected during at least one of the time-points analyzed. Generally, the concentrations of most of the measured compounds were within the order of magnitude of those reported in human brain samples. Differences in the speed of distribution to the brain were observed between the per- and polyfluoroalkyl substances (PFASs), which have protein binding potential, and the lipophilic polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and brominated flame retardants (BFRs). Based on pharmacokinetic modeling, PFASs were best described by a one compartment model. PFASs displayed relatively slow elimination (Kel) and persisted at high levels in the brain. Lipophilic OCPs and PCBs could be fitted to a 2-compartment model. These showed high levels in the brain relative to the dose administrated as calculated by area under the curve (AUC)/Dose. Altogether, our study showed that chicken is a suitable model to explore the distribution of POPs into the developing brain at concentrations which are relevant for humans.<br /> (Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)

Details

Language :
English
ISSN :
1872-9711
Volume :
88
Database :
MEDLINE
Journal :
Neurotoxicology
Publication Type :
Academic Journal
Accession number :
34757084
Full Text :
https://doi.org/10.1016/j.neuro.2021.10.013