Noreau A, Beauchemin P, Dionne-Laporte A, Dion PA, Rouleau GA, Dupré N. Exome sequencing revealed PMM2 gene mutations in a French-Canadian family with congenital atrophy of the cerebellum.
CEREBELLUM & ATAXIAS 2014;
1:8. [PMID:
26331032 PMCID:
PMC4552392 DOI:
10.1186/2053-8871-1-8]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 05/16/2014] [Indexed: 11/10/2022]
Abstract
Two affected and one unaffected siblings from a French-Canadian family were evaluated in our neurogenetic clinic. The oldest brother had intentional and postural hand tremor while his youngest sister presented mild ataxia, a similar hand tremor and global developmental delay. Brain MRIs of the two affected family members further revealed a significant cerebellar atrophy. For this study we conducted a whole exome sequencing (WES) investigation using genomic DNA prepared from the affected brother and sister, alongside DNA prepared from their unaffected mother, and identified two mutations previously reported to cause a rare disorder known as Congenital Disorder of Glycosylation, type Ia (CDG1A) (OMIM #212065). This study emphasizes how the diagnosis of patients presenting a mild tremor phenotype associated with cerebellar atrophy may benefit from WES in establishing genetic defects associated with their conditions.
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