Fragile X syndrome

Randi J Hagerman, Elizabeth Berry-Kravis, Heather Cody Hazlett, Donald B. Bailey, Herve Moine, R. Frank Kooy, Flora Tassone, Ilse Gantois, Nahum Sonenberg, Jean Louis Mandel, Paul J Hagerman

Research output: Contribution to journalReview articlepeer-review

198 Scopus citations


Fragile X syndrome (FXS) is the leading inherited form of intellectual disability and autism spectrum disorder, and patients can present with severe behavioural alterations, including hyperactivity, impulsivity and anxiety, in addition to poor language development and seizures. FXS is a trinucleotide repeat disorder, in which >200 repeats of the CGG motif in FMR1 leads to silencing of the gene and the consequent loss of its product, fragile X mental retardation 1 protein (FMRP). FMRP has a central role in gene expression and regulates the translation of potentially hundreds of mRNAs, many of which are involved in the development and maintenance of neuronal synaptic connections. Indeed, disturbances in neuroplasticity is a key finding in FXS animal models, and an imbalance in inhibitory and excitatory neuronal circuits is believed to underlie many of the clinical manifestations of this disorder. Our knowledge of the proteins that are regulated by FMRP is rapidly growing, and this has led to the identification of multiple targets for therapeutic intervention, some of which have already moved into clinical trials or clinical practice.

Original languageEnglish (US)
Number of pages1
JournalNature reviews. Disease primers
StatePublished - Sep 29 2017
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)


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