Expanding the molecular basis and phenotypic spectrum of X-linked Joubert syndrome associated with OFD1 mutations

Genetics of Learning Disability Service, Newcastle, New South Wales, Australia.
European journal of human genetics: EJHG (Impact Factor: 4.35). 02/2012; 20(7):806-9. DOI: 10.1038/ejhg.2012.9
Source: PubMed


Using a combination of linkage mapping and massively parallel sequencing of the X-chromosome exome, we identified an 18-bp deletion in exon 8 of the oral-facial-digital syndrome type 1 (OFD1) gene in a family with X-linked Joubert syndrome (JBTS10). The deletion results in an in-frame deletion of six amino acids. New features not noted in the two previously reported cases of X-linked Joubert syndrome include the presence of polycystic kidney disease, polymicrogyria and hydrocephalus. Our study further underlines the power of genetic mapping combined with massively parallel sequencing as a powerful tool for novel disease gene and mutation discovery.

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Available from: Louise M Christie, Apr 07, 2014
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    • "It is estimated that when mutated, ∼150–200 genes on the X chromosome can cause X-linked ID (XLID, previously X-linked Mental Retardation—XLMR) [Lubs et al., 2012]. High-resolution chromosome arrays and exome sequencing expand the number of potentially pathogenic variants in X-linked neurocognitive disorders (ID and/or autism spectrum disorders (ASD) [Nava et al., 2012; Whibley et al., 2010; Mondal et al., 2012)] and help to dissect the genomic and phenotypic heterogeneity confounding variably presenting ID syndromes [Field et al., 2012]. "
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