The brainstem pathologies of Parkinson's disease and dementia with lewy bodies

Kay Seidel*, Josefine Mahlke, Sonny Siswanto, Reijko Krüger, Helmut Heinsen, Georg Auburger, Mohamed Bouzrou, Lea T. Grinberg, Helmut Wicht, Horst Werner Korf, Wilfred Den Dunnen, Udo Rüb

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

196 Citations (Scopus)

Abstract

Parkinson's disease (PD) and dementia with Lewy bodies (DLB) are among the human synucleinopathies, which show alpha-synuclein immunoreactive neuronal and/or glial aggregations and progressive neuronal loss in selected brain regions (eg, substantia nigra, ventral tegmental area, pedunculopontine nucleus). Despite several studies about brainstem pathologies in PD and DLB, there is currently no detailed information available regarding the presence of alpha-synuclein immunoreactive inclusions (i) in the cranial nerve, precerebellar, vestibular and oculomotor brainstem nuclei and (ii) in brainstem fiber tracts and oligodendroctyes. Therefore, we analyzed the inclusion pathologies in the brainstem nuclei (Lewy bodies, LB; Lewy neurites, LN; coiled bodies, CB) and fiber tracts (LN, CB) of PD and DLB patients. As reported in previous studies, LB and LN were most prevalent in the substantia nigra, ventral tegmental area, pedunculopontine and raphe nuclei, periaqueductal gray, locus coeruleus, parabrachial nuclei, reticular formation, prepositus hypoglossal, dorsal motor vagal and solitary nuclei. Additionally we were able to demonstrate LB and LN in all cranial nerve nuclei, premotor oculomotor, precerebellar and vestibular brainstem nuclei, as well as LN in all brainstem fiber tracts. CB were present in nearly all brainstem nuclei and brainstem fiber tracts containing LB and/or LN. These findings can contribute to a large variety of less well-explained PD and DLB symptoms (eg, gait and postural instability, impaired balance and postural reflexes, falls, ingestive and oculomotor dysfunctions) and point to the occurrence of disturbances of intra-axonal transport processes and transneuronal spread of the underlying pathological processes of PD and DLB along anatomical pathways.

Original languageEnglish
Pages (from-to)121-135
Number of pages15
JournalBrain Pathology
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Mar 2015
Externally publishedYes

Keywords

  • Parkinson's disease
  • alpha-synuclein
  • brainstem
  • dementia with Lewy bodies
  • prion-like disease

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