ALG9-CDG: New clinical case and review of the literature
| Autor: | Xing Chang Wei, David S. Sinasac, Kellie Davis, Duncan Webster, Patrick Ferreira, Yolanda Foster, Miao He, Julian P. Midgley, Walla Al-Hertani, Xueli Li, Sheryl Jackson, L.E. Seargeant, Christopher Smith |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Cutis marmorata Pediatrics medicine.medical_specialty Transferrin isoelectrofocusing type 1 pattern Lethal skeletal dysplasia Case Report Bioinformatics medicine.disease_cause 03 medical and health sciences 0302 clinical medicine Endocrinology Genetics medicine CDG-IL Congenital disorders of glycosylation lcsh:QH301-705.5 Molecular Biology lcsh:R5-920 Mutation business.industry ALG9-CDG medicine.disease Phenotype 030104 developmental biology lcsh:Biology (General) In utero ALG9 Failure to thrive Clinical case medicine.symptom Lipodystrophy lcsh:Medicine (General) business 030217 neurology & neurosurgery |
| Zdroj: | Molecular Genetics and Metabolism Reports, Vol 13, Iss C, Pp 55-63 (2017) Molecular Genetics and Metabolism Reports |
| ISSN: | 2214-4269 |
| DOI: | 10.1016/j.ymgmr.2017.08.004 |
| Popis: | Congenital disorders of glycosylation (CDG) are a group of metabolic diseases resulting from defects in glycan synthesis or processing. The number of subgroups and their phenotypic spectrums continue to expand with most related to deficiencies of N-glycosylation. ALG9-CDG (previously CDG-IL) is the result of a mutation in ALG9. This gene encodes the enzyme alpha-1,2-mannosyltransferase. To date, a total of 10 patients from 6 different families have been reported with one of four ALG9 mutations. Seven of these patients had a similar phenotype with failure to thrive, dysmorphic features, seizures, hepatic and/or renal cysts; the other three patients died in utero from a lethal skeletal dysplasia. This report describes an additional patient with ALG9-CDG who has a milder phenotype. This patient is a term female born to Caucasian, Canadian, non-consanguineous parents of Scottish decent. Prenatally, dysmorphic features, numerous renal cysts and minor cardiac malformations were detected. Post-natally, dysmorphic features included shallow orbits, micrognathia, hypoplastic nipples, talipes equinovarus, lipodystrophy and cutis marmorata. She developed failure to thrive and seizures. The metabolic work-up included analysis of a transferrin isoelectric focusing, which showed a type 1 pattern. This was confirmed by glycan profiling, which identified ahomozygous mutation in ALG9, c.860A > G (p.Tyr287Cys) (NM_1234567890). This had been previously published as a pathogenic mutation in two Canadian patients. Our goal is to contribute to the growing body of knowledge for this disorder by describing the phenotypic spectrum and providing further insight on prognosis. |
| Databáze: | OpenAIRE |
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