Finnish hereditary amyloidosis is caused by a single nucleotide substitution in the gelsolin gene

FEBS Lett. 1990 Dec 10;276(1-2):75-7. doi: 10.1016/0014-5793(90)80510-p.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amyloidosis / blood
  • Amyloidosis / genetics*
  • Base Sequence
  • Blood Platelets / metabolism
  • Calcium-Binding Proteins / blood
  • Calcium-Binding Proteins / genetics*
  • Female
  • Finland
  • Gelsolin
  • Genes*
  • Genetic Variation
  • Humans
  • Male
  • Microfilament Proteins / blood
  • Microfilament Proteins / genetics*
  • Molecular Sequence Data
  • Mutation*
  • Oligonucleotide Probes
  • Pedigree
  • Polymerase Chain Reaction


  • Calcium-Binding Proteins
  • Gelsolin
  • Microfilament Proteins
  • Oligonucleotide Probes