Activity

Filter

Cancel
Date Panel Item Activity
8 actions
Intellectual disability syndromic and non-syndromic v0.5928 SCN8A Zornitza Stark Marked gene: SCN8A as ready
Intellectual disability syndromic and non-syndromic v0.5928 SCN8A Zornitza Stark Gene: scn8a has been classified as Green List (High Evidence).
Intellectual disability syndromic and non-syndromic v0.5928 SCN8A Zornitza Stark Phenotypes for gene: SCN8A were changed from to Developmental and epileptic encephalopathy 13, MIM# 614558
Intellectual disability syndromic and non-syndromic v0.5927 SCN8A Zornitza Stark Publications for gene: SCN8A were set to
Intellectual disability syndromic and non-syndromic v0.5926 SCN8A Zornitza Stark Mode of inheritance for gene: SCN8A was changed from Unknown to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Intellectual disability syndromic and non-syndromic v0.5881 SCN8A Tinashe Nhindiri reviewed gene: SCN8A: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 34353676, 38233770, 30171078; Phenotypes: Epileptic encephalopathy, Developmental delay, Intellectual disability; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Intellectual disability syndromic and non-syndromic v0.3378 FGF13 Zornitza Stark gene: FGF13 was added
gene: FGF13 was added to Intellectual disability syndromic and non-syndromic. Sources: Literature
Mode of inheritance for gene: FGF13 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: FGF13 were set to 33245860
Phenotypes for gene: FGF13 were set to Intellectual disability; epilepsy
Mode of pathogenicity for gene: FGF13 was set to Other
Review for gene: FGF13 was set to GREEN
Added comment: Two sibling pairs and three unrelated males reported who presented in infancy with intractable focal seizures and severe developmental delay. The variants were located in the N-terminal domain of the A isoform of FGF13/FHF2 (FHF2A). The X-linked FHF2 gene (also known as FGF13) has alternative first exons which produce multiple protein isoforms that differ in their N-terminal sequence. The variants were located at highly conserved residues in the FHF2A inactivation particle that competes with the intrinsic fast inactivation mechanism of Nav channels. Functional characterization of mutant FHF2A co-expressed with wild-type Nav1.6 (SCN8A) revealed that mutant FHF2A proteins lost the ability to induce rapid-onset, long-term blockade of the channel while retaining pro-excitatory properties. These gain-of-function effects are likely to increase neuronal excitability consistent with the epileptic potential of FHF2 variants.
Sources: Literature
Intellectual disability syndromic and non-syndromic v0.0 SCN8A Zornitza Stark gene: SCN8A was added
gene: SCN8A was added to Intellectual disability, syndromic and non-syndromic_GHQ. Sources: Expert Review Green,Genetic Health Queensland
Mode of inheritance for gene: SCN8A was set to Unknown