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Title: | A novel PDE6D mutation in a patient with Joubert syndrome type 22 (JBTS22) | Authors: | Mégarbané, André Hmaimess, Ghassan Bizzari, Sami El-Bazzal, Lara Al-Ali, Mahmoud Taleb Stora, Samantha Delague, Valerie El-Hayek, Stephany |
Affiliations: | Faculty of Medicine | Keywords: | Joubert syndrome PDE6D WES |
Issue Date: | 2019 | Publisher: | Elsevier | Part of: | European Journal of Medical Genetics | Volume: | 62 | Issue: | 11 | Abstract: | Joubert syndrome (JS) is an autosomal or X-linked recessive syndrome principally characterized by hypotonia, ataxia, cognitive impairment, and a specific finding on brain imaging called a "molar tooth sign" (MTS), which can be isolated or in conjunction with variable organ involvement. The genetic basis of JS is heterogeneous, with over 35 ciliary genes being implicated in its pathogenesis. However, some of these genes (such as PDE6D) have been associated to JS only in single families, seeking confirmation. Here we report a boy, born to first cousin parents, presenting with developmental delay, hypotonia, microcephaly, post axial polydactyly, oculomotor apraxia, and MTS. Whole exome sequencing revealed the presence of a novel homozygous truncating variant in the PDE6D gene: NM_002601.3:c.367_368insG [p.(Leu123Cysfs*13)]. The variant was confirmed by Sanger sequencing and found at the heterozygous state in both parents. A review of the literature pertaining to the role of PDE6D in JS is discussed. |
URI: | https://scholarhub.balamand.edu.lb/handle/uob/5628 | ISSN: | 17697212 | DOI: | 10.1016/j.ejmg.2018.11.010 | Ezproxy URL: | Link to full text | Type: | Journal Article |
Appears in Collections: | Faculty of Medicine |
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