Cited by 58Per- and polyfluoroalkyl substances researchIon channel regulation and functionCardiac electrophysiology and arrhythmias

Effects of Perfluorooctane Sulfonate on Action Potentials and Currents in Cultured Rat Cerebellar Purkinje Cells

Harada, Kouji H., Ishii, Takahiro M., Takatsuka, Kenji, Koizumi, Akio, Ohmori, Harunori·2006·Biochemical and Biophysical Research Communications

Abstract

Recently, PFOS was reported to be ubiquitously detected in the environment, as well as in human serum, raising concerns regarding its health risks. We investigated the effects of PFOS on action potentials and currents in cultured rat cerebellar Purkinje cells using whole-cell patch-clamp recording. In current-clamp experiments, PFOS significantly decreased the action potential frequency during current injection, the maximum rate of fall and the threshold of action potential, and negatively shifted the resting membrane potential at doses over 30microM. In voltage-clamp experiments, PFOS shifted the half-activation and inactivation voltages of I(Ca), I(Na), and I(K) toward hyperpolarization at 30microM. I(HCN1) expressed in Xenopus oocytes was similarly affected. Incorporation of PFOS into the cell membrane probably increased the surface negative charge density, thereby reducing the transmembrane potential gradient and resulting in hyperpolarizing shifts of both the activation and inactivation of ionic channels. These findings indicate that PFOS may exhibit neurotoxicity.

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Crossref · 10.1016/j.bbrc.2006.10.038

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  • 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”
  • PFOS can impact gating properties of sodium and potassium channels, but only at high concentrations above 30 μM, and nonspecific membrane impacts cannot be ruled out.

    “There are some data showing that PFOS can impact gating properties of sodium and potassium channels, ions critical for forming electrical impulses (i.e., action potentials). However, these studies only report significant effects at high concentrations, above 30 µM, and cannot rule out nonspecific membrane impacts (Harada et al., 2006).”

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Authors
Harada, K. H., Ishii, T. M., Takatsuka, K., Koizumi, A., & Ohmori, H.
Affiliations
Kyoto University (JP)
Corresponding author
Koizumi, Akio
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2006-12
Volume
351
Issue
1
Pages
240-245
ISSN
0006-291X (ISSN-L)
OpenAlex
W2091399681
Cited by
58
References
22
Citations by year
2026: 4 · 2025: 4 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 1 · 2013: 3 · 2012: 3
FWCI
3.10
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Japan Society for the Promotion of Science (17-1910)
  • Ministry of Education, Culture, Sports, Science and Technology (17023027-0133)
  • Ministry of Health, Labour and Welfare (H15-Chemistry-004)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
Keywords
PFOS, Purkinje cells, cerebellum, action potential, ionic currents, HCN1 channels, membrane surface charge, neurotoxicity
MeSH terms
Action Potentials, Animals, Cells, Cultured, Dose-Response Relationship, Drug, Fluorocarbons, Membrane Potentials, Purkinje Cells, Rats, Wistar, Alkanesulfonic Acids, Rats

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