A novel splicing mutation in the albumin gene (c.270+1G>T) causes analbuminaemia in a German infant

Gianluca Caridi, Wolfgang Thomas, Monica Campagnoli, Francesca Lugani, Monica Galliano, Lorenzo Minchiotti

Research output: Contribution to journalArticlepeer-review

Abstract

Congenital analbuminaemia is a rare autosomal recessive disorder manifested by the presence of a very low amount of circulating serum albumin. The clinical diagnosis may be challenging because of the absence of unambiguous symptoms and because hypoalbuminemia may have many causes different from a genetic lack of the protein. We describe the clinical and molecular characterization of a new case of congenital analbuminaemia in an infant of apparently non-consanguineous parents from Treves, Germany. For molecular diagnosis, we used our strategy, based on the screening of the albumin gene by single-strand conformation polymorphism, heteroduplex analysis and direct DNA sequencing, which revealed that the proband is homozygous and both parents are heterozygous, for a novel G > T transversion at nucleotide c.270+ 1, the first base of intron 3. The mutation inactivates the strongly conserved GT dinucleotide at the 5′ splice site consensus sequence of this intron. In conclusion, we report the clinical findings and the molecular defect of this case, which contributes to a better understanding of the biological mechanism of congenital analbuminaemia.

Original languageEnglish
Pages (from-to)615-619
Number of pages5
JournalAnnals of Clinical Biochemistry
Volume53
Issue number5
DOIs
Publication statusPublished - Sep 1 2016

Keywords

  • albumin gene
  • congenital analbuminaemia
  • DNA sequence analysis
  • Human serum albumin
  • splicing mutation

ASJC Scopus subject areas

  • Clinical Biochemistry

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