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Genetic markers in narcolepsy.

N Langdon, K I Welsh, M van Dam

    Lancet (London, England)
    |November 24, 1984
    PubMed
    Summary
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    Narcolepsy, a sleep disorder, shows a strong genetic link. All patients studied had the HLA DR2 antigen, suggesting a hereditary basis tied to chromosome 6.

    Area of Science:

    • Genetics
    • Immunology
    • Neurology

    Background:

    • Narcolepsy is recognized to have a hereditary component.
    • Previous research suggested a familial basis for narcolepsy.

    Purpose of the Study:

    • To investigate the association between narcolepsy and specific genetic markers.
    • To confirm the genetic underpinnings of narcolepsy.

    Main Methods:

    • Case-control study comparing narcolepsy patients and healthy individuals.
    • Analysis of major histocompatibility complex (MHC) antigen expression, specifically HLA DR2.

    Main Results:

    • All 37 narcolepsy patients expressed the HLA DR2 antigen.
    • Only 21.5% of 200 healthy controls expressed HLA DR2.

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  • This represents the strongest HLA-disease association discovered to date.
  • The findings link narcolepsy to the short arm of chromosome 6.

    • Conclusions:

    • The study confirms a significant genetic basis for narcolepsy.
    • The HLA DR2 antigen is strongly associated with narcolepsy.
    • The genetic defect may involve neurotransmitter or receptor factors linked to HLA DR2.