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© Uwe Maskos
Tranche d'hippocampe de souris colorée avec deux toxines spécifiques de sous-types de récepteur nicotinique, en rouge (grains), et en vert (corps cellulaires). L'hippocampe est la zone du cerveau qui gère la mémoire spatiale.
Publication : Neurobiology of aging

A role for β2* nicotinic receptors in a model of local amyloid pathology induced in dentate gyrus

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Neurobiology of aging - 17 Jun 2016

Lombardo S, Catteau J, Besson M, Maskos U

Link to Pubmed [PMID] – 27522251

Neurobiol. Aging 2016 Jun;46:221-234

Alzheimer’s disease (AD) is characterized by the presence of plaques and tangles. Only certain brain regions are vulnerable to progressive neurodegeneration. It is therefore important to study the contribution of key brain structures to AD pathology. Here, we investigated the consequences of amyloid accumulation specifically in dentate gyrus (DG). This was obtained with viral transduction of human amyloid precursor protein harboring 3 pathogenic mutations (hAPP-SLA, Swedish, London, and Austrian) in DG. Adult wild-type C57Bl/6J mice exhibited long-term expression of hAPP-SLA, synthesis and deposition of oligomeric amyloid beta (Aβ), and associated memory impairment. We then investigated the role of α7 or β2 subunits of the nicotinic acetylcholine receptor by transducing hAPP-SLA into C57Bl/6J mice knock-out (KO) for α7 or β2 subunits. β2 KO mice did not exhibit memory loss induced by hAPP-SLA expression, whereas aged mice lacking the α7 subunit displayed a hAPP-SLA independent cognitive deficit. The present data reveal a role for β2 containing nicotinic acetylcholine receptors in the memory deficits associated with DG specific amyloid beta expression.

http://www.ncbi.nlm.nih.gov/pubmed/27522251