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Related Experiment Video

Updated: Dec 2, 2025

A Robust Polymerase Chain Reaction-based Assay for Quantifying Cytosine-guanine-guanine Trinucleotide Repeats in Fragile X Mental Retardation-1 Gene
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Cardiovascular Problems in the Fragile X Premutation.

Nattaporn Tassanakijpanich1,2, Jonathan Cohen3, Rashelle Cohen3

  • 1UC Davis MIND Institute, UC Davis Health, Sacramento, CA, United States.

Frontiers in Genetics
|November 2, 2020
PubMed
Summary
This summary is machine-generated.

Cardiovascular issues are common in fragile X premutation carriers due to FMR1 gene expansions. Research is needed to confirm links and improve preventative treatments for these fragile X-associated conditions.

Keywords:
FMR1arrhythmiaautonomic dysfunctioncardiovascularfragile Xhypertensionpremutation

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Area of Science:

  • Genetics
  • Cardiology
  • Neuroscience

Background:

  • Fragile X premutation carriers with 55-200 CGG repeats in the FMR1 gene lack sufficient information regarding cardiovascular complications.
  • FMR1 gene expansions in the premutation range trigger toxic RNA gain-of-function, leading to cellular dysregulation.
  • This RNA toxicity mechanism is implicated in fragile X-associated tremor/ataxia syndrome, primary ovarian insufficiency, and neuropsychiatric disorders.

Purpose of the Study:

  • To review cardiovascular problems observed in fragile X premutation carriers.
  • To explore potential mechanisms contributing to these cardiovascular issues, such as RNA toxicity and FMR1 protein deficiency.

Main Methods:

  • Literature review of existing studies on cardiovascular conditions in fragile X premutation carriers.
  • Discussion of proposed pathogenetic mechanisms, including toxic RNA and protein deficiency.

Main Results:

  • Cardiovascular problems, including autonomic dysfunction, hypertension, and cardiac arrhythmias, are frequently observed in premutation carriers.
  • Arterial issues and valvular heart diseases have also been reported in this population.
  • The underlying mechanisms may involve toxic RNA gain-of-function and mild fragile X mental retardation protein deficiency.

Conclusions:

  • Further research is essential to establish a direct association between cardiovascular problems and fragile X premutation.
  • Understanding these links can facilitate the development of improved preventative strategies and treatments for affected individuals.