title: Finnish hereditary amyloidosis is caused by a single nucleotide substitution in the gelsolin gene.
abstract: The amyloid protein in Finnish hereditary amyloidosis is a fragment of the actin-filament binding region of a variant gelsolin molecule. Here we demonstrate, using polymerase chain reaction and allele-specific oligonucleotide hybridization analyses of genomic DNA, a single base mutation (G654----A654) in the gelsolin gene segment encoding the amyloid protein. The mutation is responsible for the expression of the variant (Asn187) gelsolin molecule in Finnish hereditary amyloidosis. The nucleotide substitution was found in all five unrelated patients with Finnish amyloidosis studied, but not in 45 unrelated control subjects. The mutation co-segregated with the disease phenotype in a family with Finnish amyloidosis. The results show that a single substitution in the gelsolin gene causes Finnish hereditary amyloidosis. The allele-specific oligonucleotide hybridization method provides a simple and accurate means of detecting this mutation.
authors.affiliation: Fourth Department of Medicine, University of Helsinki, Finland.
authors.forename: C P
authors.initials: CP
authors.lastname: Maury
authors.forename: J
authors.initials: J
authors.lastname: Kere
authors.forename: R
authors.initials: R
authors.lastname: Tolvanen
authors.forename: A
authors.initials: A
authors.lastname: de la Chapelle
mesh_terms: D000686:Amyloidosis / Q000097:blood / Q000235:genetics*; D001483:Base Sequence; D001792:Blood Platelets / Q000378:metabolism; D002135:Calcium-Binding Proteins / Q000097:blood / Q000235:genetics*; D005260:Female; D005387:Finland; D018260:Gelsolin; D005796:Genes; D014644:Genetic Variation; D006801:Humans; D008297:Male; D008840:Microfilament Proteins / Q000097:blood / Q000235:genetics*; D008969:Molecular Sequence Data; D009154:Mutation; D015345:Oligonucleotide Probes; D010375:Pedigree; D016133:Polymerase Chain Reaction
chemical_list: D002135:Calcium-Binding Proteins; D018260:Gelsolin; D008840:Microfilament Proteins; D015345:Oligonucleotide Probes