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Updated: Jun 6, 2026

Dissecting Cell-Autonomous Function of Fragile X Mental Retardation Protein in an Auditory Circuit by In Ovo Electroporation
Published on: July 6, 2022
The role of fragile X mental retardation protein in major mental disorders
S Hossein Fatemi1, Timothy D Folsom
1Department of Psychiatry, Division of Neuroscience Research, University of Minnesota Medical School, 420 Delaware St SE, MMC 392, Minneapolis, MN 55455, USA. fatem002@umn.edu
Abstract:
Fragile X mental retardation protein (FMRP) is highly enriched in neurons and binds to approximately 4% of mRNAs in mammalian brain. Its loss is a hallmark of fragile X syndrome (FXS), the most common form of mental retardation. In this review we discuss the mutation in the fragile X mental retardation-1 gene (FMR1), that leads to FXS, the role FMRP plays in neuronal cells, experiments from our own laboratory that demonstrate reductions of FMRP in additional psychiatric disorders (autism, schizophrenia, bipolar disorder, and major depressive disorder), and potential therapies to ameliorate the loss of FMRP. This article is part of a Special Issue entitled 'Trends in neuropharmacology: in memory of Erminio Costa'.
Insights
Fragile X mental retardation protein (FMRP) loss is central to fragile X syndrome. Reduced FMRP is also observed in other psychiatric disorders, suggesting potential therapeutic targets.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Fragile X mental retardation protein (FMRP) is crucial for neuronal function and highly abundant in the brain.
- Loss of FMRP is the primary cause of fragile X syndrome (FXS), the most common form of intellectual disability.
Purpose of the Study:
- To review the FMR1 gene mutation causing FXS.
- To explore FMRP's role in neuronal cells.
- To discuss FMRP reduction in other psychiatric disorders and potential therapies.
Main Methods:
- Review of existing literature on FMR1 gene and FMRP.
- Presentation of laboratory findings on FMRP levels in psychiatric disorders.
- Discussion of therapeutic strategies for FMRP loss.
Main Results:
- The FMR1 gene mutation leads to FXS.
- FMRP levels are reduced in autism, schizophrenia, bipolar disorder, and major depressive disorder.
- Potential therapeutic avenues for FMRP loss are explored.
Conclusions:
- FMRP's role extends beyond FXS, with its reduction implicated in various psychiatric conditions.
- Targeting FMRP loss presents a potential therapeutic strategy for multiple neurological and psychiatric disorders.
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