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Intellectual disability - microarray and sequencing v3.1519 GABRD Ivone Leong Tag Q4_21_rating was removed from gene: GABRD.
Intellectual disability - microarray and sequencing v3.1519 GABRD Sarah Leigh commented on gene: GABRD
Intellectual disability - microarray and sequencing v3.1519 GABRD Ivone Leong Source Expert Review Green was added to GABRD.
Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Intellectual disability - microarray and sequencing v3.1458 GABRD Arina Puzriakova Classified gene: GABRD as Amber List (moderate evidence)
Intellectual disability - microarray and sequencing v3.1458 GABRD Arina Puzriakova Added comment: Comment on list classification: There are sufficient unrelated cases to rate this gene as Green at the next GMS panel update. Although all patients presented epilepsy, it is not clear from the case reports whether cognitive impairment was secondary or independent of seizures. For this reason I think its worth including GABRD on this panel as it is plausible that DD may be evident prior to seizure onset (ranging from 4 months to 4 years in report)
Intellectual disability - microarray and sequencing v3.1458 GABRD Arina Puzriakova Gene: gabrd has been classified as Amber List (Moderate Evidence).
Intellectual disability - microarray and sequencing v3.1457 GABRD Arina Puzriakova gene: GABRD was added
gene: GABRD was added to Intellectual disability. Sources: Literature
Q4_21_rating tags were added to gene: GABRD.
Mode of inheritance for gene: GABRD was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GABRD were set to 34633442
Phenotypes for gene: GABRD were set to {Epilepsy, idiopathic generalized, 10}, OMIM:613060; {Epilepsy, juvenile myoclonic, susceptibility to}, OMIM:613060
Mode of pathogenicity for gene: GABRD was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: GABRD was set to GREEN
Added comment: Ahring et al., 2021 (PMID: 34633442) reports on at least 3 unrelated individuals with de novo variants and one family with 3 affected individuals harbouring an inherited variant in the GABRD gene. All variants exerted a gain-of-function effect and all carriers displayed a homogenous phenotype of generalised epilepsy (median age of onset 10.5 months, medically refractory in 5/6) and various degrees of learning difficulties or ID (learning difficulties in 1, mild ID in 2, mild to moderate ID in 1, and severe to profound ID in 2).

NB. A further three individuals were excluded from phenotypic analysis as their variants (p.M87L and p.V442I) did not show any detectable functional changes. There was also another patient with a loss-of-function variant but they displayed ASD, normal intelligence and no seizure history.
Sources: Literature