Genetic variation spectrum in ATP7B gene identified in Latvian patients with Wilson disease

Agnese Zarina, Ieva Tolmane, Madara Kreile, Aleksandrs Chernushenko, Gunta Cernevska, Ieva Pukite, Ieva Micule, Zita Krumina, Astrida Krumina, Baiba Rozentale, Linda Piekuse

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
9 Downloads (Pure)

Abstract

Background: Wilson disease (WD) is an autosomal recessive disorder of copper metabolism caused by allelic variants in ATP7B gene. More than 500 distinct variants have been reported, the most common WD causing allelic variant in the patients from Central, Eastern, and Northern Europe is H1069Q. Methods: All Latvian patients with clinically confirmed WD were screened for the most common mutation p.H1069Q by PCR Bi-PASA method. Direct DNA sequencing of gene ATP7B (all 21 exons) was performed for the patients with WD symptoms, being either heterozygous for H1069Q or without it on any allele. Results: We identified 15 different allelic variants along with eight non-disease-causing allelic variants. Based on the gene molecular analysis and patients' clinical data variant p.His1069Gln was found in 66.9% of WD alleles. Wide clinical variability was observed among individuals with the same ATP7B genotype. The results of our study confirm that neurological manifestations of WD are typically present later than the liver disease but no significant association between the presence/absence of the most common genetic variant and mode of initial WD presentation or age at presentation was identified. Conclusions: (1) The most prevalent mutation in Latvian patients with Wilson disease was c.3207C>A (p.His1069Gln); (2) No significant phenotype–genotype correlation was found in Latvian patients with Wilson disease; (3) The estimated prevalence of Wilson disease in Latvia is 1 of 24,000 cases which is higher than frequently quoted prevalence of 1: 30,000.

Original languageEnglish
Pages (from-to)405-409
Number of pages5
JournalMolecular Genetics and Genomic Medicine
Volume5
Issue number4
DOIs
Publication statusPublished - Jul 2017

Keywords*

  • ATP7B gene
  • copper metabolism
  • Wilson disease

Field of Science*

  • 3.1 Basic medicine
  • 3.2 Clinical medicine

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

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