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Insertions of integral numbers of an octapeptide repeat in the prion protein gene are pathogenic mutations associated with inherited prion diseases. Conversely, deletions of a single octapeptide repeat are found as normal polymorphisms in many populations and do not predispose individuals to prion disease. The authors report a two-octapeptide repeat deletion in an elderly woman with a rapidly progressive dementia consistent with Creutzfeldt-Jakob disease. This mutation was absent from more than 3,000 individuals and may be causally related to prion disease and represent a novel disease mechanism.


Journal article



Publication Date





354 - 356


Aged, Aged, 80 and over, Alleles, Amino Acid Sequence, Creutzfeldt-Jakob Syndrome, Female, Gene Deletion, Humans, Molecular Sequence Data, Prions, Tandem Repeat Sequences