title: Molecular analysis of glycogen storage disease type Ia in Iranian Azeri Turks: identification of a novel mutation.
abstract: Glycogen storage diseases (GSDs) are caused by abnormalities in enzymes that are involved in the regulation of gluconeogenesis and glycogenolysis. GSD I, an autosomal recessive metabolic disorder, is the most common GSD and has four subtypes. Here, we examined GSD Ia caused by the defective glucose-6-phosphatase catalytic (G6PC) gene. We investigated the frequency of GSD Ia and clarified its molecular aspect in patients with the main clinical and biochemical characteristics of GSD, including 37 unrelated patients with a mean age of three years at the time of diagnosis. All patients belonged to the Azeri Turkish population. Hypoglycaemia and hypertriglyceridaemia were the most frequent laboratory findings. Mutations were detected by performing direct sequencing. Mutation analysis of the G6PC gene revealed that GSD Ia accounted for 11% in GSD patients with involvement of liver. Three patients were homozygous for R83C mutation. In addition, a novel stop mutation, Y85X, was identified in a patient with the typical features of GSD Ia.
authors.affiliation: Liver and Gastrointestinal Disease Research Center, Tabriz University of Medical Sciences, Tabriz 5166/15731, Iran. mderakhshan2002@gmail.com.
authors.forename: Shekari Khaniani
authors.initials: SK
authors.lastname: Mahmoud
authors.forename: Aziz
authors.initials: A
authors.lastname: Khorrami
authors.forename: Mandana
authors.initials: M
authors.lastname: Rafeey
authors.forename: Robabeh
authors.initials: R
authors.lastname: Ghergherehchi
authors.forename: Mansoori Derakhshan
authors.initials: MD
authors.lastname: Sima
mesh_terms: D000293:Adolescent; D000483:Alleles; D015415:Biomarkers; D002648:Child; D002675:Child, Preschool; D004252:DNA Mutational Analysis; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D005838:Genotype; D005952:Glucose-6-Phosphatase / Q000235:genetics*; D005953:Glycogen Storage Disease Type I / Q000175:diagnosis* / Q000235:genetics*; D006801:Humans; D007223:Infant; D007492:Iran; D008297:Male; D009154:Mutation; D010375:Pedigree
chemical_list: D015415:Biomarkers; D005952:Glucose-6-Phosphatase