Neuroprotective effects of resveratrol against Aβ administration in rats are improved by lipid-core nanocapsules.

Abstract:

:Alzheimer's disease (AD), a neurodegenerative disorder exhibiting a gradual decline in cognitive function, is characterized by the presence of neuritic plaques composed of neurofibrillary tangles and amyloid-β (Aβ) peptide. Available drugs for AD therapy have small effect sizes and do not alter disease progression. Several studies have been shown that resveratrol is associated with anti-amyloidogenic properties, but therapeutic application of its beneficial effects is limited. Here we compared the neuroprotective effects of free resveratrol treatment with those of resveratrol-loaded lipid-core nanocapsule treatment against intracerebroventricular injection of Aβ1-42 in rats. Animals received a single intracerebroventricular injection of Aβ1-42 (2 nmol), and 1 day after Aβ infusion, they were administered either free resveratrol (RSV) or resveratrol-loaded lipid-core nanocapsules (5 mg/kg, each 12 h, intraperitoneally), for 14 days. Aβ1-42-infused animals showed a significant impairment on learning memory ability, which was paralleled by a significant decrease in hippocampal synaptophysin levels. Furthermore, animals exhibited activated astrocytes and microglial cells, as well as disturbance in c-Jun N-terminal kinase (JNK) and glycogen synthase kinase-3β (GSK-3β) activation, beyond destabilization of β-catenin levels. Our results clearly show that by using lipid-core nanocapsules, resveratrol was able to rescue the deleterious effects of Aβ1-42 while treatment with RSV presented only partial beneficial effects. These findings might be explained by the robust increase of resveratrol concentration in the brain tissue achieved by lipid-core nanocapsules. Our data not only confirm the potential of resveratrol in treating AD but also offer an effective way to improve the efficiency of resveratrol through the use of nanodrug delivery systems.

journal_name

Mol Neurobiol

journal_title

Molecular neurobiology

authors

Frozza RL,Bernardi A,Hoppe JB,Meneghetti AB,Matté A,Battastini AM,Pohlmann AR,Guterres SS,Salbego C

doi

10.1007/s12035-013-8401-2

subject

Has Abstract

pub_date

2013-06-01 00:00:00

pages

1066-80

issue

3

eissn

0893-7648

issn

1559-1182

journal_volume

47

pub_type

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