Identification of a novel mutation in UDP-glucuronosyltransferase (UGT1A1) gene in a child with neonatal unconjugated hyperbilirubinemia

Angelo Minucci, Giulia Canu, Luigia Gentile, Bruno Giardina, Cecilia Zuppi, Ettore Domenico Capoluongo

Risultato della ricerca: Contributo in rivistaArticolo in rivista

4 Citazioni (Scopus)

Abstract

Genetic alterations of the UGT1A1 gene result in Crigler-Najjar (CNS) and Gilbert's (GS)-Syndromes, two autosomal recessive conditions characterized by non-hemolytic unconjugated hyperbilirubinemia. While GS is characterized by mild hyperbilirubinemia, CNS is classified as follows: type I (CNS-I), often associated with irreversible neurological damage due to total deficiency of the UGT1A1 enzyme activity, and type II (CNS-II) where a minimal level of UGT1A1 enzyme activity is maintained. In this context, differential diagnosis of CNS forms needs to be supported by clinical molecular laboratory, in order to correlate biochemical findings to specific genetic mutations. Our paper describes in detail the peculiar clinical feature found in a child with severe neonatal unconjugated hyperbilirubinemia, where DNA analysis showed a new compound heterozygosis determined by two mutations, a known (c.508_510delTTC) and a novel mutation (c.1099C>T) giving a genotype compatible with clinical picture of CNS-II. This novel genotype extends the spectrum of known UGT1A1 mutations, which, in our opinion, could be higher than that currently reported in the literature. Finally, genetic analysis may also be helpful for patients' management.
Lingua originaleEnglish
pagine (da-a)170-172
Numero di pagine3
RivistaClinical Biochemistry
Volume46
DOI
Stato di pubblicazionePubblicato - 2013

Keywords

  • UGT1A1
  • unconjugated hyperbilirubinemia

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