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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-44245

Mackenzie, I R A; Munoz, D G; Kusaka, H; Yokota, O; Ishihara, K; Roeber, S; Kretzschmar, H A; Cairns, N J; Neumann, M (2011). Distinct pathological subtypes of FTLD-FUS. Acta Neuropathologica, 121(2):207-218.

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Most cases of frontotemporal lobar degeneration (FTLD) are characterized by abnormal intracellular accumulation of either tau or TDP-43 protein. However, in ~10% of cases, composed of a heterogenous collection of uncommon disorders, the molecular basis remains to be uncertain. We recently discovered that the pathological changes in several tau/TDP-43-negative FTLD subtypes are immunoreactive (ir) for the fused in sarcoma (FUS) protein. In this study, we directly compared the pattern of FUS-ir pathology in cases of atypical FTLD-U (aFTLD-U, N = 10), neuronal intermediate filament inclusion disease (NIFID, N = 5) and basophilic inclusion body disease (BIBD, N = 8), to determine whether these are discrete entities or represent a pathological continuum. All cases had FUS-ir pathology in the cerebral neocortex, hippocampus and a similar wide range of subcortical regions. Although there was significant overlap, each group showed specific differences that distinguished them from the others. Cases of aFTLD-U consistently had less pathology in subcortical regions. In addition, the neuronal inclusions in aFTLD-U usually had a uniform, round shape, whereas NIFID and BIBD were characterized by a variety of inclusion morphologies. In all cases of aFTLD-U and NIFID, vermiform neuronal intranuclear inclusions (NII) were readily identified in the hippocampus and neocortex. In contrast, only two cases of BIBD had very rare NII in a single subcortical region. These findings support aFTLD-U, NIFID and BIBD as representing closely related, but distinct entities that share a common molecular pathogenesis. Although cases with overlapping pathology may exist, we recommend retaining the terms aFTLD-U, NIFID and BIBD for specific FTLD-FUS subtypes.


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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Neuropathology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Deposited On:02 Mar 2011 16:24
Last Modified:05 Apr 2016 14:42
Publisher DOI:10.1007/s00401-010-0764-0
PubMed ID:21052700

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