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Clinical and Neuropathological Features of the Arctic APP Gene Mutation Causing Early-Onset Alzheimer Disease
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för folkhälso- och vårdvetenskap. (Geriatrics)
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för folkhälso- och vårdvetenskap. (Geriatrics)
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2008 (engelsk)Inngår i: Archives of Neurology, ISSN 0003-9942, E-ISSN 1538-3687, Vol. 65, nr 4, s. 499-505Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: A majority of mutations within the beta-amyloid region of the amyloid precursor protein (APP) gene cause inherited forms of intracerebral hemorrhage. Most of these mutations may also cause cognitive impairment, but the Arctic APP mutation is the only known intra-beta-amyloid mutation to date causing the more typical clinical picture of Alzheimer disease. Objective: To describe features of 1 Swedish and 1 American family with the previously reported Arctic APP mutation. Design, Setting, and Participants: Affected and non-affected carriers of the Arctic APP mutation from the Swedish and American families were investigated clinically. In addition, 1 brain from each family was investigated neuropathologically. Results: The clinical picture, with age at disease onset in the sixth to seventh decade of life and dysfunction in multiple cognitive areas, is indicative of Alzheimer disease and similar to the phenotype for other Alzheimer disease APP mutations. Several affected mutation carriers displayed general brain atrophy and reduced blood flow of the parietal lobe as demonstrated by magnetic resonance imaging and single-photon emission computed tomography. One Swedish case and 1 American case with the Arctic APP mutation came to autopsy, and both showed no signs of hemorrhage but revealed severe congophilic angiopathy, region-specific neurofibrillary tangle pathological findings, and abundant amyloid plaques. Intriguingly, most plaques from both of these cases had a characteristic ringlike character. Conclusions: Overall, our findings corroborate that the Arctic APP mutation causes a clinical and neuropathological picture compatible with Alzheimer disease.

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2008. Vol. 65, nr 4, s. 499-505
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URN: urn:nbn:se:uu:diva-16098DOI: 10.1001/archneur.65.4.499ISI: 000254835700010PubMedID: 18413473OAI: oai:DiVA.org:uu-16098DiVA, id: diva2:43869
Tilgjengelig fra: 2008-04-21 Laget: 2008-04-21 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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