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Rett syndrome: initial experience with an emerging clinical entity.

A K Percy, H Zoghbi, V M Riccardi

    Brain & Development
    |January 1, 1985
    PubMed
    Summary
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    Researchers identified potential causes of Rett syndrome in five female patients. Key findings include reduced neurotransmitter metabolites, particularly homovanillic acid, in cerebrospinal fluid and axonopathy in sural nerve biopsies.

    Area of Science:

    • Neuroscience
    • Genetics
    • Pediatric Neurology

    Background:

    • Rett syndrome is a rare neurodevelopmental disorder primarily affecting females.
    • Its exact pathogenesis remains incompletely understood, necessitating further research into underlying mechanisms.

    Purpose of the Study:

    • To investigate the anatomic, physiologic, and biochemical parameters in female patients with Rett syndrome.
    • To identify potential leads regarding the pathogenesis of this complex neurological disorder.

    Main Methods:

    • Systematic evaluation of clinical, anatomic, physiologic, and biochemical data from five female patients.
    • Analysis of cerebrospinal fluid for neurotransmitter metabolites.
    • Electron microscopy examination of sural nerve biopsy from one patient.

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    Main Results:

    • Consistent reduction in cerebrospinal fluid neurotransmitter metabolites observed in all patients.
    • Greatest reduction noted in homovanillic acid, a key dopamine metabolite.
    • Sural nerve biopsy revealed intact myelin with evidence of axonopathy.

    Conclusions:

    • Findings suggest potential roles for neurotransmitter dysregulation and axonal damage in Rett syndrome pathogenesis.
    • Further studies are required to confirm these preliminary observations.
    • The presented cases align with previous international reports on Rett syndrome.