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A reassessment of the neuropathology of frontotemporal dementia linked to chromosome 3
- Holm, Ida Elisabeth (author)
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- Englund, Elisabet (author)
- Lund University,Lunds universitet,Tumörmikromiljö,Sektion I,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Tumor microenvironment,Section I,Department of Clinical Sciences, Lund,Faculty of Medicine
- Mackenzie, Ian R. A. (author)
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- Johannsen, Peter (author)
- Isaacs, Adrian M. (author)
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- (creator_code:org_t)
- 2007
- 2007
- English.
- In: Journal of Neuropathology and Experimental Neurology. - 1554-6578. ; 66:10, s. 884-891
- Journal article (peer-reviewed)
Abstract
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- A large Danish family has previously been reported in which autosomal dominant frontotemporal dementia (FTD) is genetically linked to chromosome 3 (FTD-3). A mutation was recently identified in the CHMP2B gene that is probably responsible for causing disease in this family. Because of its neuropathologic findings, FTD-3 was originally categorized as a subtype of frontotemporal lobar degeneration, termed "dementia lacking distinctive histopathology." We now report a reevaluation of the neuropathologic changes in this family. Postmortem material from 4 affected family members was available for examination. Gross examination revealed generalized cortical atrophy that was most severe in frontal and temporal cortices. Microscopy showed loss of cortical neurons. microvacuolation of layer 11, mild gliosis, and demyelination of the deep white matter. Results of immunohistochemical staining for alpha-synuclein, prion protein, neurofilament, and tau protein were unremarkable. Variable numbers of small, round, ubiquitin-positive cytoplasmic inclusions were present in the dentate granule layer of the hippocampus in all 4 cases. Rare ubiquitin-positive inclusions were also found in frontal and temporal cortical neurons. These inclusions were also positive for p62 but not for TDP-43. The finding of ubiquitin- and p62-positive, TDP-43-neaative cytoplasmic inclusions in the hippocampus and neocortex suggests reclassification of the neuropathology of FTD-3 as a unique subtype of frontotemporal lobar degeneration with ubiquitin-positive inclusions that are TDP-43 -negative.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Neurologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Neurology (hsv//eng)
Keyword
- frontotemporal lobar degeneration
- chromosome 3
- dementia lacking distinctive histopathology
- ubiquitin
Publication and Content Type
- art (subject category)
- ref (subject category)
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