Inherited 2q23.1 microdeletions involving the MBD5 locus
نویسندگان
چکیده
BACKGROUND Microdeletions of 2q23.1 disrupting MBD5 and loss of function mutations of MBD5 cause MBD5-Associated Neurodevelopmental disorders (MAND). Nearly all reported patients have been isolated cases of de novo origin. METHODS This study investigates three families with inherited MBD5 mutations from three different Regional Genetics Centres in the UK. RESULTS Two of the parents in the study had MBD5 deletions in a mosaic form. The parent with an MBD5 deletion in an apparently nonmosaic form has a psychiatric disorder in the absence of developmental delay or dysmorphism. CONCLUSIONS Inherited forms of MBD5 deletions are rare, but do occur, especially in a mosaic form. The phenotypic spectrum of MAND may be wider than previously thought.
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1. Talkowski ME, Mullegama SV, Rosenfeld JA et al. Assessment of 2q23.1 microdeletion syndrome implicates MBD5 as a single causal locus of intellectual disability, epilepsy, and autism spectrum disorder. Am J Hum Genet 2011: 89: 551–563. 2. van Bon BW, Koolen DA, Brueton L et al. The 2q23.1 microdeletion syndrome: clinical and behavioural phenotype. Eur J Hum Genet 2010: 18: 163–170. 3. Laget S...
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