Cited by 38Pesticide Exposure and ToxicityToxic Organic Pollutants ImpactEffects and risks of endocrine disrupting chemicals

Effects of Environmental Pollutants on Calcium Release and Uptake by Rat Cortical Microsomes

Open access
Dusza, Hanna M., Cenijn, Peter H., Kamstra, Jorke H., Westerink, Remco H.S., Leonards, Pim E.G., Hamers, Timo·2018·NeuroToxicology

Abstract

Dysregulation of neuronal intracellular Ca2+ homeostasis can play a crucial role in many neurotoxic effects, including impaired brain development and behavioral dysfunctions. This study examined 40 suspected neurotoxicants from different chemical classes for their capacity to alter Ca2+ release and uptake from rat cortical microsomes. First, ten suspected neurotoxicants have been tested using a well-established cuvette-based Ca2+ flux assay. Five out of ten compounds (TOCP, endosulfan, PCB-95, chlorpyrifos and BDE-49) showed a significant, concentration-dependent alteration of Ca2+ release and uptake in adult rat cortical microsomes. The original cuvette assay was downscaled and customized to a fast, higher throughput microplate method and the 40 suspected neurotoxicants were screened for their effects on intracellular Ca2+homeostasis. In decreasing order of potency, the 15 test compounds that showed the strongest alteration of Ca2+ levels in adult rat microsomes were TOCP, endosulfan, BDE-49, 6-OH-BDE-47, PCB-95, permethrin, alpha-cypermethrin, chlorpyrifos, bioallethrin, cypermethrin, RDP, DEHP, DBP, BDE-47, and PFOS. Results from co-exposure experiments with selective inhibitors suggested that for some compounds Ca2+ releasing effects could be attributed to RyR activation (PFOS, DBP, and DEHP) or to SERCA inhibition (a potential novel mechanism of action for all four tested pyrethroid insecticides). The effects of the two most potent compounds, endosulfan and TOCP, were not blocked by any of the inhibitors tested, indicating other possible mechanism of action. For all other potent test compounds, a combined effect on RyR, IP3R, and/or SERCA has been observed. PFOS and 6-OH-BDE-47 caused increased Ca2+ release from adult but not from neonatal rat brain microsomes, indicating age-dependent difference in susceptibility to these test compounds. The current study suggests that the neurotoxic potential of compounds belonging to different chemical classes could partly be attributed to the effects on intracellular Ca2+ release and uptake. Although further validation is required, the downscaled method developed in this study presents technical advance that could be used for the future screening of suspected intracellular Ca2+ disruptors.

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 · 10.1016/j.neuro.2018.07.015

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?

  • PFAS-induced increases in neuronal Ca2+ have been observed in both in vivo and in vitro studies.

    “PFAS-induced increases in neuronal Ca2+ have been observed in both in vivo and in vitro studies”

    From A Critical Review and Meta-Analysis of Impacts of Per- and Polyfluorinated Substances on the Brain and Behavior (2022) · cites this paper as Dusza et al., 2018

    The Introduction and section 4.1.1 report elevated calcium in cultured hippocampal neurons exposed to PFOS, supporting the in vitro part. The paper also reports increased calcium release from isolated rat cortical microsomes. Although its References list a study titled as finding calcium overload in rat offspring, our copy does not establish that increased neuronal calcium was observed in vivo. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • PFAS-induced neuronal Ca2+ increases appear to be driven by Ca2+ influx from the extracellular space and intracellular Ca2+ storage organelles such as mitochondria and endoplasmic reticulum.

    “appear to be driven by Ca2+ influx from the extracellular space and intracellular Ca2+ storage organelles, such as the mitochondria and endoplasmic reticulum”

    From A Critical Review and Meta-Analysis of Impacts of Per- and Polyfluorinated Substances on the Brain and Behavior (2022) · cites this paper as Dusza et al., 2018

    Section 4.1.1 reports that PFOS caused calcium release from rat cortical microsomes through RyR-mediated mobilization of intracellular stores. It does not establish calcium influx from extracellular space or release from mitochondria as drivers of PFAS-induced neuronal calcium increases. The methods in Section 2.4 studied isolated microsomes rather than influx into intact neurons; page numbers were unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Several Ca2+ dependent signaling molecules, including CaMKII, CREB, and calcineurin, have been shown to be sensitive to PFAS exposure.

    “Several Ca2+ dependent signaling molecules, including Ca2+/calmodulin-dependent protein kinase II (CaMKII), cAMP-response element binding protein (CREB), and calcineurin (CaN) have also been shown to be sensitive to PFAS exposure”

    From A Critical Review and Meta-Analysis of Impacts of Per- and Polyfluorinated Substances on the Brain and Behavior (2022) · cites this paper as Dusza et al., 2018

    Section 4.1.1 reports that PFOS increased calcium release from rat cortical microsomes, but it does not address whether CaMKII, CREB, or calcineurin are sensitive to PFAS exposure. Searches for the three molecule names and their expanded forms found no passage establishing the attributed claim. (LLM, conf=0.73)

    Experimental — accuracy not yet measured

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

1 of the 71 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Dusza, H. M., Cenijn, P. H., Kamstra, J. H., Westerink, R. H. S., Leonards, P. E. G., & Hamers, T.
Affiliations
  • Utrecht University (NL)
  • Vrije Universiteit Amsterdam (NL)
  • Norwegian University of Life Sciences (NO)
Corresponding author
Hamers, Timo
Venue
NeuroToxicology
Publisher
Elsevier BV
Published
2018-12
Volume
69
Pages
266-277
ISSN
0161-813X (ISSN-L)
OpenAlex
W2884092761
Cited by
38
References
71
Citations by year
2026: 6 · 2025: 4 · 2024: 7 · 2023: 6 · 2022: 3 · 2021: 5 · 2020: 4 · 2019: 3
FWCI
2.65
Type
journal article
Language
en
Open access
Locations
  • NeuroToxicology (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • BIBSYS Brage (BIBSYS (Norway)) (acceptedVersion, cc-by-nc-nd)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
  • NORA - Norwegian Open Research Archives (submittedVersion, cc-by-nc-nd)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
DENAMIC
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Pesticide Exposure and Toxicity
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Effects and risks of endocrine disrupting chemicals
Keywords
environmental pollutants, neurotoxicity, intracellular calcium homeostasis, calcium release, calcium uptake, pyrethroid insecticides, PFOS, endosulfan, triphenyltin, PCB 95, chlorpyrifos, BDE-49, SERCA inhibition, ryanodine receptor, IP3 receptor, microplate assay, age-related susceptibility
MeSH terms
Animals, Calcium, Cerebral Cortex, Environmental Pollutants, Female, Microsomes, Rats, Wistar, Rats, Sarcoplasmic Reticulum Calcium-Transporting ATPases

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