Journal Article

DZNE-2026-00611

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lewy Bodies Are Not Associated With Neuronal or Synaptic Loss in Dementia With Lewy Bodies.

Hawksworth, J. I. ; Kirkby-Geddes, E. ; Thom, S. ; O'Neill, J. ; Ikwue, A. ; Wood, L. ; Outeiro, T. F.DZNE* ; Erskine, D.

2026
Wiley-Blackwell Oxford [u.a.]

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Please use a persistent id in citations: doi:10.1111/nan.70085

Abstract: The misfolding and accumulation of the protein α-synuclein (αSyn) into cytoplasmic inclusions termed Lewy bodies (LBs) and Lewy neurites is the defining neuropathological feature of LB diseases, such as Parkinson's disease (PD) and dementia with Lewy bodies (DLB). The loss of neurons and/or synapses has been postulated to underlie the clinical syndrome of DLB. The present study sought to elucidate the relationship between LB burden and neuronal and synaptic loss in DLB.Post-mortem brain tissue from the cingulate gyrus and inferior temporal gyrus, two regions vulnerable to LB pathology, was obtained from DLB (N = 20) and control cases (N = 20). Formalin-fixed paraffin-embedded tissue was stained to quantify LB, Alzheimer-type pathology and a neuronal marker. Frozen tissue from the contralateral hemisphere was processed for immunoblotting to compare the abundance of synaptic markers across cases.Across both regions, no evidence of reduced total neuronal density was observed, but a modest reduction in parvalbumin interneurons was observed in the cingulate gyrus, and there were only modest reductions in some synaptic markers in DLB. LB burden was markedly variable across DLB cases but was not associated with any synaptic marker abundance or neuronal density.Taken together, these findings do not support an association between LB density and neuronal or synaptic loss in DLB, even in regions with particularly high burdens of LBs, such as the cingulate gyrus. These findings suggest that the link between αSyn proteinopathy and disease requires further investigation.

Keyword(s): Humans (MeSH) ; Lewy Body Disease: pathology (MeSH) ; Lewy Body Disease: metabolism (MeSH) ; Neurons: pathology (MeSH) ; Neurons: metabolism (MeSH) ; Synapses: pathology (MeSH) ; Synapses: metabolism (MeSH) ; Female (MeSH) ; Aged, 80 and over (MeSH) ; Male (MeSH) ; Lewy Bodies: pathology (MeSH) ; Lewy Bodies: metabolism (MeSH) ; Aged (MeSH) ; Gyrus Cinguli: pathology (MeSH) ; Gyrus Cinguli: metabolism (MeSH) ; alpha-Synuclein: metabolism (MeSH) ; Temporal Lobe: pathology (MeSH) ; Temporal Lobe: metabolism (MeSH) ; alpha‐synuclein ; dementia with Lewy bodies ; histopathology ; neuronal density ; synaptic proteins ; alpha-Synuclein

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Contributing Institute(s):

1. Epigenetics and Systems Medicine in Neurodegenerative Diseases (AG Fischer)

Research Program(s):

1. 352 - Disease Mechanisms (POF4-352) (POF4-352)

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Database coverage:
; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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