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Dissecting Cell-Autonomous Function of Fragile X Mental Retardation Protein in an Auditory Circuit by In Ovo Electroporation

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Published on: July 6, 2022

Mechanisms underlying auditory processing deficits in Fragile X syndrome.

Elizabeth A McCullagh^1,2, Sarah E Rotschafer^3,4, Benjamin D Auerbach⁵

¹Department of Physiology and Biophysics, University of Colorado Anschutz, Aurora, CO, USA.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology

|February 11, 2020

Summary

Fragile X syndrome (FXS), a common cause of autism spectrum disorder (ASD), reveals auditory pathway disruptions. Research explores mechanisms of sound hypersensitivity in ASD, guiding future therapies.

Keywords:

Fragile X syndrome auditory system autism spectrum disorders circuit development hyperacusis synaptic transmission

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Published on: December 28, 2010

Area of Science:

Neuroscience
Genetics
Audiology

Background:

Auditory hypersensitivity (hyperacusis) is common in autism spectrum disorders (ASD).
Fragile X syndrome (FXS), the leading genetic cause of ASD, provides a model for studying auditory dysfunction.
Understanding FXS auditory pathways offers insights into ASD hyperacusis mechanisms.

Purpose of the Study:

To review disruptions in auditory pathways in FXS at multiple levels.
To explore molecular, synaptic, and circuit-level mechanisms underlying auditory dysfunction in FXS.
To identify research directions for therapies targeting auditory dysfunction in ASD.

Main Methods:

Review of studies on animal models of FXS.
Analysis of data from individuals with FXS.
Examination of molecular, synaptic, and neural circuit alterations in auditory pathways.

Main Results:

Aberrant synaptic development and ion channel deregulation in auditory brainstem circuits.
Impaired neuronal plasticity and network hyperexcitability in the auditory cortex.
Multiple mechanisms contribute to auditory dysfunction in FXS.

Conclusions:

FXS research illuminates auditory pathway disruptions relevant to ASD.
Novel research directions are emerging for understanding and treating hyperacusis in ASD.
Further investigation is crucial for developing effective human therapies for auditory dysfunction in ASD.