Home HOME General Physiology and Biophysics 2007 General Physiology and Biophysics Vol.26, p.306-310, 2007

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Quarterly, 80 pp. per issue
Founded: 1982
ISSN  1338-4325 (online)

Published in English

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General Physiology and Biophysics Vol.26, p.306-310, 2007

Title: Identification of the deletions in the UGT1A1 gene of the patients with Crigler–Najjar syndrome type I from Slovakia
Author: I. Zmetakova, V. Ferak, G. Minarik, A. Ficek, H. Polakova, E. Ferakova, L. Kadasi1
Abstract: Crigler–Najjar syndrome type I (CN I) is a rare autosomal recessive disorder due to hepatic dysfunction of uridine diphospho-glucuronosyltransferase (UGT) activity toward bilirubin. Complete inactivation of this enzyme causing CN I lead to accumulation of unconjugated bilirubin in serum and bile. Here we report the results of the molecular characterization of the uridine diphospho- glucuronosyltransferase 1A1 (UGT1A1) gene in a consanguineous family of Slovak Roms and an unrelated non-Romany family with CN I. Sequence analysis of UGT1A1 gene in all four Romany patients showed mutation in exon 4, a deletion of an A at codon 407 (1220delA), not yet described in homozygous status. All analysed patients were homozygous for 1220delA mutation and their 3 healthy sibs were heterozygous. The non-Romany patient was a compound heterozygote for two different deletions, 1220delA and 717-718delAG at codon 239. In the family of his cousin a son was born affected with CN I, who was homozygote for 717-718delAG mutation. His other niece affected with CN II was heterozygote for mutation 717-718delAG but homozygote for TA insertion and enhancer substitution T-3279G. Haplotype analysis suggests that the 1220delA mutation is identical by descent in both families, though they originate from two ethnically different populations (Slovaks vs. Roms).
Keywords: Crigler–Najjar syndrome type I — Gilbert syndrome — Sequence analysis — UGT1A1 gene
Year: 2007, Volume: 26, Issue: Page From: 306, Page To: 310


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