A novel frame-shift deletion causing analbuminaemia in an Italian paediatric patient

作者：Dagnino M; Caridi G; Marsciani M; Bettocchi I; Tassinari D; Bernardi F; Chiodo F; Campagnoli M; Galliano M; Minchiotti L^*

来源：European Journal of Clinical Investigation, 2010, 40(3): 281-284.

DOI：10.1111/j.1365-2362.2010.02256.x

• Analbuminaemia
• DNA sequence
• heteroduplex analysis
• human serum albumin
• mutations
• single-strand conformation polymorphism

P>Background
Analbuminaemia (OMIM #103600) is a rare autosomal recessive disorder manifested by the absence or severe reduction of circulating serum albumin in homozygous or compound heterozygous subjects. The trait is caused by a variety of mutations within the albumin gene.
Design
We report here the clinical and molecular characterization of a new case of congenital analbuminaemia in a 4-year-old Italian girl diagnosed on the basis of the low level of circulating albumin (= 10 center dot 0 g L-1). The albumin gene was screened by single-strand conformation polymorphism and heteroduplex analysis and the mutated region submitted to DNA sequencing.
Results
The proband was found to be homozygous, and both parents heterozygous, for a novel deletion in exon 8 (c.920delT). The subsequent frame-shift should have given rise to a putative polypeptide chain of 304 amino acid residues, which we could not identify in the proband's serum.
Conclusions
A novel analbuminaemia causing mutation was identified and characterized at the clinical level in a child. The molecular diagnosis of the trait is based on the rapid localization of the mutation within the albumin gene by single-strand conformation polymorphism and heteroduplex analysis, followed by DNA sequencing of the mutated region.

• 出版日期2010-3