Likely inborn error of metabolism - targeted testing not possible
Gene: SERAC1Comment on publications: added publicationCreated: 19 Dec 2017, 10:56 a.m.
Wortmann et al (2017) PMID: 29205472 reclassified MEGDEL syndrome to MEGDHEL syndrome, 3-MEthylGlutaconic aciduria, Dystonia-Deafness, Hepatopathy, Encephalopathy, Leigh-like syndrome (MEGDHEL) as they found that liver involvement was an additional clinical feature, so Hepatopathy was incorporated into the acronym. From a study of 67 individuals (39 previously unreported) from 59 families were included (age range 5 days - 33.4 years, median age 9 years) Wortmann et al idenitified 41 different SERAC1 biallelic variants, including 20 that have not been reported before. With exception of two families with a milder phenotype, all affected individuals show a strikingly homogeneous phenotype and time course. Severe, reversible neonatal liver dysfunction and hypoglycemia was seen in more than 40% of all cases. Starting at a median age of six months muscular hypotonia (91%) was seen, followed by progressive spasticity (82%, median onset 15 months) and dystonia (82%, 18 months). The majority of affected individuals never learnt to walk (68%). 79% suffered hearing loss, 58% never learnt to speak, nearly all had significant intellectual disability (88%).Created: 19 Dec 2017, 10:56 a.m.
Comment on mode of inheritance: Confirmed on OMIM.Created: 15 Mar 2016, 8:28 a.m.
Comment on list classification: Carl Fratter also confirmed that this gene should be green.Created: 15 Mar 2016, 8:27 a.m.
Phenotypes for gene: SERAC1 were changed from Disorders of mitochondrial membrane lipids (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Multiple respiratory chain complex deficiencies (disorders of protein synthesis); Methylglutaconic aciduria with deafness, encephalopathy and Leigh-like syndrome (MEGDEL) (Organic acidurias); 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739 to 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, OMIM:614739; Disorders of mitochondrial membrane lipids (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Multiple respiratory chain complex deficiencies (disorders of protein synthesis)
Source NHS GMS was added to SERAC1. Source London North GLH was added to SERAC1.
Ellen McDonagh: Comment on mode of pathogenici
Added phenotypes Disorders of mitochondrial membrane lipids (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Multiple respiratory chain complex deficiencies (disorders of protein synthesis); Methylglutaconic aciduria with deafness, encephalopathy and Leigh-like syndrome (MEGDEL) (Organic acidurias); 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739 for gene: SERAC1 Publications for gene SERAC1 were changed from 29205472 to 27604308
gene: SERAC1 was added gene: SERAC1 was added to Inborn errors of metabolism. Sources: Expert Review Green Mode of inheritance for gene: SERAC1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SERAC1 were set to 29205472 Phenotypes for gene: SERAC1 were set to Multiple respiratory chain complex deficiencies (disorders of protein synthesis); 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739