Cited by 237Selenium in Biological SystemsOrganoselenium and organotellurium chemistryEpilepsy research and treatment

Neuronal selenoprotein expression is required for interneuron development and prevents seizures and neurodegeneration

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Wirth, Eva K., Conrad, Marcus, Winterer, Jochen, Wozny, Christian, Carlson, Bradley A., Roth, Stephan, Schmitz, Dietmar, Bornkamm, Georg W. +6 more·2010·The FASEB Journal

Abstract

Cerebral selenium (Se) deficiency is associated with neurological phenotypes including seizures and ataxia. We wanted to define whether neurons require selenoprotein expression and which selenoproteins are most important, and explore the possible pathomechanism. Therefore, we abrogated the expression of all selenoproteins in neurons by genetic inactivation of the tRNA[Ser] Sec gene. Cerebral expression of selenoproteins was significantly diminished in the mutants, and histological analysis revealed progressive neurodegeneration. Developing interneurons failed to specifically express parvalbumin (PV) in the mutants. Electrophysiological recordings, before overt cell death, showed normal excitatory transmission, but revealed spontaneous epileptiform activity consistent with seizures in the mutants. In developing cortical neuron cultures, the number of PV + neurons was reduced on combined Se and vitamin E deprivation, while other markers, such as calretinin (CR) and GAD67, remained unaffected. Because of the synergism between Se and vitamin E, we analyzed mice lacking neuronal expression of the Se‐dependent enzyme glutathione peroxidase 4 (GPx4). Although the number of CR + interneurons remained normal in Gpx4 ‐mutant mice, the number of PV + interneurons was reduced. Since these mice similarly exhibit seizures and ataxia, we conclude that GPx4 is a selenoenzyme modulating interneuron function and PV expression. Cerebral SE deficiency may thus act via reduced GPx4 expression.—Wirth, E. K., Conrad, M., Winterer, J., Wozny, C., Carlson, B. A., Roth, S., Schmitz, D., Bornkamm, G. W., Coppola, V., Tessarollo, L., Schomburg, L., Köhrle, J., Hatfield, D. L., Schweizer, U. Neuronal selenoprotein expression is required for interneuron development and prevents seizures and neurodegeneration. FASEB J. 24, 844–852 (2010). www.fasebj.org

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Crossref · 10.1096/fj.09-143974

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  • In Gclm-deficient mice, oxidative challenges at juvenile and peripubertal ages, but not in the adult, lead to long-lasting PVI impairments in the prefrontal cortex.

    “The vulnerability of PVI function to oxidative stress is high early in development, resulting in permanent consequences for the adult: in Gclm-deficient mice, oxidative challenges at juvenile and peripubertal ages, but not in the adult, lead to long-lasting PVI impairments in the prefrontal cortex (PFC) 59,60 .”

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Authors
Wirth, E. K., Conrad, M., Winterer, J., Wozny, C., Carlson, B. A., Roth, S., Schmitz, D., Bornkamm, G. W., Coppola, V., Tessarollo, L., Schombure, L., Köhrle, J., Hateld, D. L., & Schweizer, U.
Affiliations
  • Charité – Universitätsmedizin Berlin (DE)
  • Helmholtz Munich (DE)
  • University of Strathclyde (GB)
  • National Institutes of Health (US)
  • National Cancer Institute (US)
  • Institute for Experimental Endocrinology Charité‐Universitätsmedizin Berlin Berlin Germany
Corresponding author
Schweizer, Ulrich
Venue
The FASEB Journal
Publisher
Wiley
Published
2009-11-04
Volume
24
Issue
3
Pages
844-852
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2143099403
Cited by
237
References
46
Citations by year
2026: 6 · 2025: 11 · 2024: 17 · 2023: 16 · 2022: 17 · 2021: 18 · 2020: 11 · 2019: 11 · 2018: 12 · 2017: 14 · 2016: 17 · 2015: 19 · 2014: 21 · 2013: 16 · 2012: 9
FWCI
10.00
Type
journal article
Language
en
Open access
Locations
  • The FASEB Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (submittedVersion)
  • Site cant be reached (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • National Institutes of Health
  • National Cancer Institute
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Organoselenium and organotellurium chemistry
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
Keywords
selenoproteins, selenium deficiency, GPX4, parvalbumin, interneuron development, seizures, neurodegeneration, vitamin E, ataxia, spontaneous epileptiform activity, calretinin, cortical interneurons
MeSH terms
Phospholipid Hydroperoxide Glutathione Peroxidase, Animals, Cell Differentiation, Cells, Cultured, Electrophysiology, Glutathione Peroxidase, Immunohistochemistry, Interneurons, Nerve Degeneration, Parvalbumins, RNA, Transfer, Amino Acyl, Seizures, Selenium, Vitamin E, Blotting, Western, Mice, Knockout, Selenoproteins, Mice, S100 Calcium Binding Protein G, Calbindin 2

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