Canine cognitive dysfunction and the cerebellum: acetylcholinesterase reduction, neuronal and glial changes

Sabrina Ceccariglia, Carlo Gangitano, Aurora Del Fa' Gangitano, Fabrizio Michetti, Marco Pugliese, Jl Carrasco, Manuel Rodriguez, Joan Mascort, Nicole Mahy

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

28 Citazioni (Scopus)

Abstract

The specific functional and pathological alterations observed in Alzheimer's disease are less severe in the cerebellum than in other brain areas, particularly the entorhinal cortex and hippocampus. Since dense core amyloid-beta plaque formation has been associated with an acetylcholinesterase heterogeneous nucleator action, we examined if an acetylcholinesterase imbalance was involved in cerebellum plaque deposition. By using the canine counterpart of senile dementia of the Alzheimer's type, a promising model of human brain aging and early phases of Alzheimer's disease, we investigated how cerebellar pathology and acetylcholinesterase density could be related with cognitive dysfunction. As in Alzheimer's disease, the late affectation of the cerebellum was evidenced by its lack of amyloid-beta plaque and the presence of diffuse deposition throughout all cortical grey matter layers. The highest acetylcholinesterase optic density corresponded to cerebellar islands of the granular layer and was predominantly associated with synaptic glomeruli and the somata of Golgi cells. Its reduction correlated with aging and loss of granule cells, whereas cognitive deficit only correlated with loss of Purkinje cells. The observed Bergmann glia alterations may correspond to a reactive response to the loss and damage of the Purkinje cells, their specific neuronal partner. Regarding the role of acetylcholinesterase mediation in amyloid-beta deposition, our data argue against an interaction between these two proteins because acetylcholinesterase reduction correlates with aging but not with cognitive deficit. Finally, our data support the use of companion dogs of all breeds to study aging and early phases of Alzheimer's disease.
Lingua originaleEnglish
pagine (da-a)85-94
Numero di pagine10
RivistaBrain Research
Stato di pubblicazionePubblicato - 2007

Keywords

  • acetylcholinesterase density
  • aging
  • alzheimer's disease
  • canine cognitive disfunction
  • cerebellum
  • neural loss

Fingerprint Entra nei temi di ricerca di 'Canine cognitive dysfunction and the cerebellum: acetylcholinesterase reduction, neuronal and glial changes'. Insieme formano una fingerprint unica.

Cita questo