Environmental enrichment and exercise are better than social enrichment to reduce memory deficits in amyloid beta neurotoxicity.
Proc Natl Acad Sci U S A
; 115(10): E2403-E2409, 2018 03 06.
Article
em En
| MEDLINE
| ID: mdl-29463708
ABSTRACT
Recently, nongenetic animal models to study the onset and development of Alzheimer's disease (AD) have appeared, such as the intrahippocampal infusion of peptides present in Alzheimer amyloid plaques [i.e., amyloid-ß (Aß)]. Nonpharmacological approaches to AD treatment also have been advanced recently, which involve combinations of behavioral interventions whose specific effects are often difficult to determine. Here we isolate the neuroprotective effects of three of these interventions-environmental enrichment (EE), anaerobic physical exercise (AnPE), and social enrichment (SE)-on Aß-induced oxidative stress and on impairments in learning and memory induced by Aß. Wistar rats were submitted to 8 wk of EE, AnPE, or SE, followed by Aß infusion in the dorsal hippocampus. Short-term memory (STM) and long-term memory (LTM) of object recognition (OR) and social recognition (SR) were evaluated. Biochemical assays determined hippocampal oxidative status reactive oxygen species, lipid peroxidation by thiobarbituric acid reactive substance (TBARS) test, and total antioxidant capacity by ferric reducing/antioxidant power (FRAP), as well as acetylcholinesterase activity. Aß infusion resulted in memory deficits and hippocampal oxidative damage. EE and AnPE prevented all memory deficits (STM and LTM of OR and SR) and lipid peroxidation (i.e., TBARS). SE prevented only the SR memory deficits and the decrease of total antioxidant capacity decrease (i.e., FRAP). Traditionally, findings obtained with EE protocols do not allow discrimination of the roles of the three individual factors involved. Here we demonstrate that EE and physical exercise have better neuroprotective effects than SE in memory deficits related to Aß neurotoxicity in the AD model tested.
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Base de dados:
MEDLINE
Assunto principal:
Peptídeos beta-Amiloides
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Terapia por Exercício
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Doença de Alzheimer
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Transtornos da Memória
Tipo de estudo:
Guideline
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Prognostic_studies
Limite:
Animals
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Humans
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Male
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article