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The fragile-X premutation: a maturing perspective.

Paul J Hagerman1, Randi J Hagerman

  • 1Department of Biochemistry and Molecular Medicine, University of California-Davis, Davis, CA 95616, USA. pjhagerman@ucdavis.edu

American Journal of Human Genetics
|March 31, 2004
PubMed
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Individuals carrying premutation alleles of the fragile-X mental retardation 1 (FMR1) gene may experience cognitive issues, premature ovarian failure, or fragile-X-associated tremor/ataxia syndrome (FXTAS). Early recognition is crucial for diagnosis and treatment.

Area of Science:

  • Genetics
  • Neuroscience
  • Endocrinology

Background:

  • Premutation alleles of the fragile-X mental retardation 1 (FMR1) gene are typically considered clinically silent.
  • Emerging evidence suggests carriers can develop distinct clinical conditions.

Purpose of the Study:

  • To highlight the spectrum of clinical disorders associated with FMR1 premutation alleles.
  • To emphasize the importance of recognizing these conditions for timely diagnosis and intervention.

Main Methods:

  • Review of clinical presentations in individuals with FMR1 premutation alleles.
  • Analysis of associated neurological, cognitive, and reproductive symptoms.

Main Results:

  • Identified three main clinical disorders: fragile-X spectrum deficits, premature ovarian failure, and fragile-X-associated tremor/ataxia syndrome (FXTAS).

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  • FXTAS is a newly described neurodegenerative disorder affecting older adult carriers.

    • Conclusions:

    • FMR1 premutation carriers are not always clinically unaffected and can present with significant health issues.
    • Increased awareness is vital for healthcare providers, especially in movement-disorders clinics, to ensure proper diagnosis and management of FMR1-associated conditions.