Cited by 47Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactZebrafish Biomedical Research Applications

A Mixture of Persistent Organic Pollutants and Perfluorooctanesulfonic Acid Induces Similar Behavioural Responses, but Different Gene Expression Profiles in Zebrafish Larvae

Open access
Khezri, Abdolrahman, Fraser, Thomas, Nourizadeh-Lillabadi, Rasoul, Kamstra, Jorke, Berg, Vidar, Zimmer, Karin, Ropstad, Erik·2017·International Journal of Molecular Sciences

Abstract

Persistent organic pollutants (POPs) are widespread in the environment and some may be neurotoxic. As we are exposed to complex mixtures of POPs, we aimed to investigate how a POP mixture based on Scandinavian human blood data affects behaviour and neurodevelopment during early life in zebrafish. Embryos/larvae were exposed to a series of sub-lethal doses and behaviour was examined at 96 h post fertilization (hpf). In order to determine the sensitivity window to the POP mixture, exposure models of 6 to 48 and 48 to 96 hpf were used. The expression of genes related to neurological development was also assessed. Results indicate that the POP mixture increases the swimming speed of larval zebrafish following exposure between 48 to 96 hpf. This behavioural effect was associated with the perfluorinated compounds, and more specifically with perfluorooctanesulfonic acid (PFOS). The expression of genes related to the stress response, GABAergic, dopaminergic, histaminergic, serotoninergic, cholinergic systems and neuronal maintenance, were altered. However, there was little overlap in those genes that were significantly altered by the POP mixture and PFOS. Our findings show that the POP mixture and PFOS can have a similar effect on behaviour, yet alter the expression of genes relevant to neurological development differently.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3390/ijms18020291

Cites

70 of 70 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • At concentrations 20 times those measured in the Scandinavian cohort, zebrafish exposed to the mixture containing all the POPs from 48-96 hpf experienced an increase in swimming speed at 96 hpf compared to controls.

    “At concentrations 20 × those measured in the Scandinavian cohort, Khezri et al. found that zebrafish exposed to the mixture containing all the POPs from 48–96 hpf experienced an increase in swimming speed at 96 hpf compared to controls (2017).”

    From A Critical Review and Meta-Analysis of Impacts of Per- and Polyfluorinated Substances on the Brain and Behavior (2022) · cites this paper as Khezri et al., 2017

    Results §§2.1 and 2.5 report increased swimming speed at 20× the human serum level and after exposure from 48–96 hpf, respectively. But Methods §4.6 specifies that the 48–96 hpf experiment used the total POP mixture at 100× the human serum level, not 20×. The claim combines results from different exposure conditions. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • All mixtures containing PFOS elicited the same increase in swimming speed at 96 hpf and did not exceed the effect observed in fish exposed to PFOS alone.

    “However, all mixtures containing PFOS elicited the same effect at this time point and did not exceed the effect observed in fish exposed to PFOS alone”
  • PFOS was the driving factor in the behavioral response observed in Khezri et al.

    “indicating that PFOS was the driving factor in this behavioral response (Khezri et al., 2017).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. [39]National Research Council Complex Mixtures: Methods for In Vivo Toxicity Testing National Academies Press Washington, DC, USA 1988 25032282

Cited by

Sorted by citations

Authors
Khezri, A., Fraser, T., Nourizadeh-Lillabadi, R., Kamstra, J., Berg, V., Zimmer, K., & Ropstad, E.
Affiliations
Norwegian University of Life Sciences (NO)
Corresponding author
Khezri, Abdolrahman
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2017-01-29
Volume
18
Issue
2
Pages
291
ISSN
1422-0067 (ISSN-L)
OpenAlex
W2582682152
Cited by
47
References
70
Citations by year
2026: 1 · 2025: 3 · 2024: 6 · 2023: 4 · 2022: 8 · 2021: 8 · 2020: 6 · 2019: 5 · 2018: 4 · 2017: 2
FWCI
2.73
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • BIBSYS Brage (BIBSYS (Norway)) (submittedVersion, cc-by)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
Funders
Norges Miljø- og Biovitenskapelige Universitet
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Zebrafish Biomedical Research Applications
Keywords
persistent organic pollutants, PFOS, perfluorinated compounds, zebrafish larvae, brain development, behavioral responses, swimming speed, gene expression, neurotoxicity, exposure windows, neurotransmitter systems, stress response genes
MeSH terms
Animals, Behavior, Animal, Fertilization, Fluorocarbons, Gene Expression Regulation, Larva, Organic Chemicals, Swimming, Water Pollutants, Chemical, Zebrafish, Cluster Analysis, Alkanesulfonic Acids, Gene Expression Profiling, Transcriptome

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review