Journal
JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY
Volume 68, Issue 1, Pages 73-82Publisher
OXFORD UNIV PRESS INC
DOI: 10.1097/NEN.0b013e3181927577
Keywords
alpha-synuclein; familial Lewy body dementia; generalized tauopathy; synucleinopathy; tau
Categories
Funding
- CIBERNED, FIS [PI05/1570]
- European Commission [LSHM-CT-2004-503039]
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We describe a Spanish family in which 3 of 4 siblings had dementia with Lewy bodies, 2 of them starting at age 26 years and the other at 29 years. The father has recently been diagnosed with Lewy body disease, with onset at 77 years. Neuropathological examination of the brain of the index patient disclosed unusual features characterized by diffuse Lewy body disease and generalized neurofibrillary tangle pathology but with not amyloid deposits in any region. Moreover, Lewy body pathology colocalized with neurofibrillary tangles in most affected neurons. Mutation screening that included all coding exons of presenilin 1 (PSEN1), presenilin 2 (PSEN2), alpha-synuclein (SNCA), beta-synuclein (SNCB), microtubule-associated protein tau (MAPT) leucine-rich repeat kinase 2 (LRRK2), glucocerebrosidase (GBA), and exons 16 and 17 of the amyloid precursor protein (APP) genes did not identify any mutation. Genome-wide single nucleotide polymorphism was performed in 4 family members and ruled out any pathogenic duplication or deletion in the entire genome. In summary. we report a unique family with pathologically confirmed early-onset dementia with Lewy, bodies with widespread tau and alpha-synuclein deposition. The absence Of Mutations in genes known to cause Lewy body disease suggests that a novel locus or loci are implicated in this neurodegenerative disease.
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