title: Early-onset ocular ochronosis in a girl with alkaptonuria (AKU) and a novel mutation in homogentisate 1,2-dioxygenase (HGD).
abstract: Alkaptonuria (AKU) is a disorder of phenylalanine/tyrosine metabolism due to a defect in the enzyme homogentisate 1,2-dioxygenase (HGD). This recessive disease is caused by mutations in the HGD gene. We report a 14-year-old girl who was referred after presenting black urine. Careful examination revealed ochronosis of the conjunctiva. There was no affection of the cardiac valves. Elevated excretion of homogentisic acid in urine was found. Sequence analysis of the HGD gene from genomic DNA revealed that the patient is a compound heterozygote with a previously described mutation (c.473C>T, p.Pro158Leu), and a novel one (c.821C>T, p.Pro274Leu). Her mother is heterozygous for the novel mutation, while the brother is heterozygous for the previously described mutation. In summary, we describe an alkaptonuric patient with ocular ochronosis and a novel HGD mutation, c.821C>T, p.Pro274Leu.
authors.affiliation: Faculty of Medicine Skopje, R. Macedonia.
authors.forename: Z S
authors.initials: ZS
authors.lastname: Gucev
authors.forename: N
authors.initials: N
authors.lastname: Slaveska
authors.forename: N
authors.initials: N
authors.lastname: Laban
authors.forename: D
authors.initials: D
authors.lastname: Danilovski
authors.forename: V
authors.initials: V
authors.lastname: Tasic
authors.forename: N
authors.initials: N
authors.lastname: Pop-Jordanova
authors.forename: A
authors.initials: A
authors.lastname: Zatkova
mesh_terms: D000293:Adolescent; D000474:Alkaptonuria / Q000150:complications / Q000175:diagnosis / Q000235:genetics; D005260:Female; D050560:Homogentisate 1,2-Dioxygenase / Q000235:genetics*; D006801:Humans; D009154:Mutation; D009794:Ochronosis / Q000175:diagnosis / Q000209:etiology
chemical_list: D050560:Homogentisate 1,2-Dioxygenase