De novo MECP2 duplication in two females with random X-inactivation and moderate mental retardation
Ute Grasshoff, Michael Bonin, Ina Goehring, Arif Ekici, Andreas Dufke, Kirsten Cremer, Nicholas Wagner, Eva Rossier, Anna Jauch, Michael Walter, Claudia Bauer, Peter Bauer, Karl Horber, Stefanie Beck-Woedl, Dagmar Wieczorek, Ute Grasshoff, Michael Bonin, Ina Goehring, Arif Ekici, Andreas Dufke, Kirsten Cremer, Nicholas Wagner, Eva Rossier, Anna Jauch, Michael Walter, Claudia Bauer, Peter Bauer, Karl Horber, Stefanie Beck-Woedl, Dagmar Wieczorek
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.
Figures
Source: PubMed