Alzheimer's disease with spastic paraparesis and 'cotton wool' plaques: two pedigrees with PS-1 exon 9 deletions
Several pedigrees have recently been reported in which dominantly inherited familial Alzheimer's disease is associated in some family members with spastic paraparesis and non-neuritic 'cotton wool' plaques. Here we report clinical, genetic and neuropathological findings in two further large pedigrees in which this combination of phenotypes is associated with a deletion of exon 9 of the presenilin-1 (PS-1) gene caused by mutations at the splice acceptor site. In both pedigrees, individuals with paraparesis at presentation had a later than average age at onset of symptoms. In addition, one subject with paraparesis had a much less prominent dementia syndrome than his dementia-affected siblings. As PS-1 mutations are almost always associated with a particularly aggressive form of presenile dementia, these findings suggest the existence of a protective or delaying factor in individuals with spastic paraparesis.
|Authors||Brooks, W. S.;Kwok, J. B.;Kril, J. J.;Broe, G. A.;Blumbergs, P. C.;Tannenberg, A. E.;Lamont, P. J.;Hedges, P.;Schofield, P. R. :|
|Published Issue||Pt 4|
|URL link to publisher's version||http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=12615638|