Bringing fragile X-associated neuropsychiatric disorders into the phenotypic fold of premutation conditions

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Carriers of the fragile X premutation can develop neuropsychiatric disorders, challenging the belief that they are clinically unaffected.
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Fragile X-associated neuropsychiatric disorders (FXAND) can manifest in childhood but are more prevalent in adults, affecting up to half of premutation carriers.
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Research shows that RNA toxicity from the premutation begins early and disrupts limbic system function, leading to behavioral changes similar to FXAND.
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Early intervention is crucial, as white matter changes may precede neurological symptoms, indicating a continuum of premutation involvement.
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The study emphasizes the need for early diagnosis and treatment of FXAND to prevent progression to more severe conditions like FXTAS.

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