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  • Title: De novo MECP2 duplication in two females with random X-inactivation and moderate mental retardation.
    Author: Grasshoff U, Bonin M, Goehring I, Ekici A, Dufke A, Cremer K, Wagner N, Rossier E, Jauch A, Walter M, Bauer C, Bauer P, Horber K, Beck-Woedl S, Wieczorek D.
    Journal: Eur J Hum Genet; 2011 May; 19(5):507-12. PubMed ID: 21326285.
    Abstract:
    Xq28 duplications including MECP2 are a well-known cause of severe mental retardation in males with seizures, muscular hypotonia, progressive spasticity, poor speech and recurrent infections that often lead to early death. Female carriers usually show a normal intellectual performance due to skewed X-inactivation (XCI). We report on two female patients with a de novo MECP2 duplication associated with moderate mental retardation. In both patients, the de novo duplication occurred on the paternal allele, and both patients show a random XCI, which can be assumed as the triggering factor for the phenotype. Furthermore, we describe the phenotype that might be restricted to unspecific mild-to -moderate mental retardation with neurological features in early adulthood.
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