title: Canine cognitive deficit correlates with diffuse plaque maturation and S100beta (-) astrocytosis but not with insulin cerebrospinal fluid level.
abstract: Like humans, canines develop with aging beta-amyloid (Abeta) plaques and a progressive cognitive deficit on tasks similar to those used in diagnosis and follow-up of Alzheimer's disease. Owing to that, dogs are quite unique to investigate the early events taking place in the diffuse Abeta plaque maturation and its relationship with cognitive deficit. The aim of the present investigation was to study the link between the diffuse Abeta plaque maturation and the astro- and microglial reactivity. The involvement of insulin and beta-subunit of S100 protein (S100beta) overexpression in the process was also investigated. Abeta plaques were measured and counted in prefrontal cortex of 16 pet dogs of different breeds, weight and sex, classified as control and with a light or severe cognitive deficit. A correlation between canine graded cognitive deficit, diffuse plaque maturation, and S100beta (-) astrocytosis, but not with cerebrospinal fluid insulin level, was found that may reflect the very early events of Abeta deposition in Alzheimer's disease.
authors.affiliation: Unitat de Bioquímica, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Facultat de Medicina, Universitat de Barcelona, c/ Casanova, 143, 08036, Barcelona, Spain.
authors.forename: Marco
authors.initials: M
authors.lastname: Pugliese
authors.forename: Maria Concetta
authors.initials: MC
authors.lastname: Geloso
authors.forename: Josep Lluís
authors.initials: JL
authors.lastname: Carrasco
authors.forename: Joan
authors.initials: J
authors.lastname: Mascort
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Michetti
authors.forename: Nicole
authors.initials: N
authors.lastname: Mahy
mesh_terms: D000375:Aging / Q000378:metabolism / Q000523:psychology; D016229:Amyloid beta-Peptides / Q000378:metabolism; D000818:Animals; D001253:Astrocytes / Q000378:metabolism / Q000473:pathology; D003072:Cognition Disorders / Q000473:pathology* / Q000523:psychology*; D004285:Dogs; D005260:Female; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D005911:Gliosis / Q000473:pathology* / Q000523:psychology*; D007150:Immunohistochemistry; D007328:Insulin / Q000134:cerebrospinal fluid*; D037102:Lectins; D008297:Male; D017628:Microglia / Q000378:metabolism / Q000473:pathology; D009414:Nerve Growth Factors / Q000378:metabolism*; D058225:Plaque, Amyloid / Q000473:pathology*; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000378:metabolism*
chemical_list: D016229:Amyloid beta-Peptides; D005904:Glial Fibrillary Acidic Protein; D007328:Insulin; D037102:Lectins; D009414:Nerve Growth Factors; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins