Rebecca Foulger edited their review of gene: DPAGT1: Added comment: Review and rating collated by Tracy Lester (Oxford Medical Genetics Laboratories Oxford University Hospitals NHS Foundation Trust, 2019_02_06) on behalf of Wessex and West Midlands GLH for GMS Neurology specialist test group, for Clinical Indication R59 'Early onset or syndromic epilepsy'. Review contributors: John Taylor and Helen Lord. Suggested gene rating: Green. ; Changed rating: AMBER
Rebecca Foulger Added comment: Comment on list classification: Updated rating from Amber to Green: Green review. Confirmed DD-G2P gene for Congenital disorder of glycosylation (CDG), which can present with seizures. Sufficient cases of seizures from the literature (3 cases from PMIDs:22304930, 23249953, 12872255) for inclusion on panel.
Rebecca Foulger commented on gene: DPAGT1: In a patient with central disorder of glycosylation type Ij, Wu et al. (2003, PMID:12872255) identified reduced DPAGT1 enzymatic activity. In the paternal allele, a variant Y170C was identified. Although no variant was identified in the maternal allele, it produced only 12% of the normal amount of mRNA. She had severe hypotonia and medically intractable seizures amongst her phenotypes.
Rebecca Foulger commented on gene: DPAGT1: In a Pakistani brother and sister born of unrelated patients with a mild form of CDG Ij, Iqbal et al. (2013, PMID:23249953) identified compound heterozygous mutations in the DPAGT1 gene (I29F and L168P). The patients had normal psychomotor development until ages 2 and 5 years, respectively, when they both developed seizures, hypotonia, and aggressive behavior. Seizures and additional phenotypes continued into adulthood.