Cited by 135Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchIon channel regulation and function

Fragile X mental retardation protein is required for rapid experience-dependent regulation of the potassium channel Kv3.1b

Open access
Strumbos, John G., Brown, Maile R., Kronengold, Jack, Polley, Daniel B., Kaczmarek, Leonard K.·2010·The Journal of Neuroscience

Abstract

Fragile X mental retardation protein (FMRP) is an RNA-binding protein that regulates synaptic plasticity by repressing translation of specific mRNAs. We found that FMRP binds mRNA encoding the voltage-gated potassium channel Kv3.1b in brainstem synaptosomes. To explore the regulation of Kv3.1b by FMRP, we investigated Kv3.1b immunoreactivity and potassium currents in the auditory brainstem sound localization circuit of male mice. The unique features of this circuit allowed us to control neuronal activity in vivo by exposing animals to high-frequency, amplitude-modulated stimuli, which elicit predictable and stereotyped patterns of input to the anterior ventral cochlear nucleus (AVCN) and medial nucleus of the trapezoid body (MNTB). In wild-type (WT) animals, Kv3.1b is expressed along a tonotopic gradient in the MNTB, with highest levels in neurons at the medial, high-frequency end. At baseline,Fmr1−/−mice, which lack FMRP, displayed dramatically flattened tonotopicity in Kv3.1b immunoreactivity and K+currents relative to WT controls. Moreover, after 30 min of acoustic stimulation, levels of Kv3.1b immunoreactivity were significantly elevated in both the MNTB and AVCN of WT, but not Fmr1−/−, mice. These results suggest that FMRP is necessary for maintenance of the gradient in Kv3.1b protein levels across the tonotopic axis of the MNTB, and are consistent with a role for FMRP as a repressor of protein translation. Using numerical simulations, we demonstrate that Kv3.1b tonotopicity may be required for accurate encoding of stimulus features such as modulation rate, and that disruption of this gradient, as occurs in Fmr1−/−animals, degrades processing of this information.

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 · 10.1523/jneurosci.1125-10.2010

Cites

56 of 56 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?

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

Cited by

Sorted by citations

Authors
Strumbos, J. G., Brown, M. R., Kronengold, J., Polley, D. B., & Kaczmarek, L. K.
Affiliations
  • Yale University (US)
  • Massachusetts Eye and Ear Infirmary (US)
Corresponding author
Kaczmarek, Leonard K.
Venue
The Journal of Neuroscience
Published
2010-08-04
Volume
30
Issue
31
Pages
10263-10271
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2034460847
Cited by
135
References
56
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 4 · 2022: 11 · 2021: 7 · 2020: 14 · 2019: 14 · 2018: 10 · 2017: 10 · 2016: 9 · 2015: 12 · 2014: 7 · 2013: 9 · 2012: 5
FWCI
4.85
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • FRAXA Research Foundation
  • National Institutes of Health
  • National Institute on Deafness and Other Communication Disorders (DC001919, R01DC009836, R03DC009488, DC009488, R01DC001919)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
Keywords
FMRP, voltage-gated potassium channels, medial nucleus of the trapezoid body, Fmr1 knockout mice, synaptic plasticity, translation repression, RNA-binding proteins
MeSH terms
Acoustic Stimulation, Animals, Auditory Pathways, Brain Stem, Immunohistochemistry, Male, Neurons, RNA, Messenger, Sound Localization, Blotting, Western, Evoked Potentials, Auditory, Brain Stem, Mice, Knockout, Mice, Shaw Potassium Channels, Fragile X Messenger Ribonucleoprotein 1

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