Abstract
We established a diagnosis of familial amyloidotic polyneuropathy (FAP) based on DNA and demonstrated a direct link between prealbumin gene mutation and FAP. The individuals with FAP, so far examined, were heterozygous for the prealbumin gene, carrying one normal and one mutant gene. To investigate the molecular pathogenesis of FAP, we isolated a normal prealbumin gene (7 kb in length) and also a mutant prealbumin gene associated with FAP. We compared their nucleotide sequences and found that they matched except for a single-base substitution present in the second exon. In an effort to construct mouse model systems for the FAP, we developed strains of transgenic mice carrying human mutant prealbumin genes.
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