Naslov
Hyperinsulinism-hyperammonemia syndrome: a de novo mutation of the GLUD1 gene in twins and a review of the literature

Autori
Ninković, Dorotea ; Sarnavka, Vladimir ; Bašnec, Anica ; Ćuk, Mario ; Ramadža, Danijela Petković ; Fumić, Ksenija ; Kušec, Vesna ; Santer, René ; Barić, Ivo

Izvornik
Journal of Pediatric Endocrinology and Metabolism (2191-0251) 29 (2016), 9; 1083-1088

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cognitive impairment ; epilepsy ; GLUD1 gene ; glutamate dehydrogenase ; hyperammonemia ; hypoglycemia

Sažetak
Hyperinsulinism-hyperammonemia (HI/HA) syndrome is a rare autosomal dominant disease characterized by recurrent hypoglycemia and persistent mild elevation of plasma ammonia. HI/HA syndrome is one of the more common forms of congenital hyperinsulinism (CHI), caused by activating mutations within the GLUD1 gene that encodes the mitochondrial enzyme glutamate dehydrogenase (GDH). We report here on monozygotic twin girls presented with fasting- and protein-induced hypoglycemia and mild persistent hyperammonemia. Genetic analysis revealed that both girls were heterozygous for a novel missense mutation within exon 11 [c.1499A>T, p.(R443W)] of the GLUD1 gene. Despite early treatment with diazoxide and a low protein diet, they both developed non-hypoglycemic seizures in early childhood followed by cognitive impairment. In addition to their clinical course, a review of the literature on HI/HA syndrome is provided.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

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