Rosiglitazone reverses memory decline and hippocampal glucocorticoid receptor down-regulation in an Alzheimer’s disease mouse model

Clinical trials with rosiglitazone, a potent agonist at peroxisome proliferator-activated receptor gamma (PPARγ) suggest an improvement of cognitive function in Alzheimer’s disease (AD) patients. The mechanisms mediating this potential beneficial effect remain to be fully elucidated. In mice overexp...

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Veröffentlicht in:Biochemical and biophysical research communications 2009-02, Vol.379 (2), p.406-410
Hauptverfasser: Escribano, Luis, Simón, Ana-María, Pérez-Mediavilla, Alberto, Salazar-Colocho, Pablo, Río, Joaquín Del, Frechilla, Diana
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container_issue 2
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container_title Biochemical and biophysical research communications
container_volume 379
creator Escribano, Luis
Simón, Ana-María
Pérez-Mediavilla, Alberto
Salazar-Colocho, Pablo
Río, Joaquín Del
Frechilla, Diana
description Clinical trials with rosiglitazone, a potent agonist at peroxisome proliferator-activated receptor gamma (PPARγ) suggest an improvement of cognitive function in Alzheimer’s disease (AD) patients. The mechanisms mediating this potential beneficial effect remain to be fully elucidated. In mice overexpressing mutant human amyloid precursor protein (hAPP), a model of AD, we found that memory impairment in the object recognition test was prevented and also reversed by chronic rosiglitazone treatment. Given the possible involvement of glucocorticoid receptors (GR) in the actions of PPARγ-ligands, we studied the effect of chronic rosiglitazone treatment on GR levels in the hippocampus of hAPP mice. An early down-regulation of GR, not related to elevated plasma corticosterone levels, was found in different hippocampal subfields of the transgenic mice and this decrease was prevented by rosiglitazone. In parallel with behavioural studies, rosiglitazone also normalized GR levels in older animals. This effect may contribute to explain the attenuation of memory decline by PPARγ activation in an AD mouse model.
doi_str_mv 10.1016/j.bbrc.2008.12.071
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ispartof Biochemical and biophysical research communications, 2009-02, Vol.379 (2), p.406-410
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source MEDLINE; Elsevier ScienceDirect Journals
subjects 60 APPLIED LIFE SCIENCES
Administration, Oral
Alzheimer Disease - blood
Alzheimer Disease - complications
Alzheimer Disease - genetics
Alzheimer’s disease
Amyloid beta-Protein Precursor - genetics
Amyloid beta-Protein Precursor - metabolism
Animals
BLOOD PLASMA
CLINICAL TRIALS
CORTICOSTERONE
Down-Regulation
GENE REGULATION
Glucocorticoids
HIPPOCAMPUS
Hippocampus - drug effects
Hippocampus - metabolism
HUMAN POPULATIONS
Humans
Memory
Memory Disorders - blood
Memory Disorders - genetics
Memory Disorders - prevention & control
Mice
Mice, Transgenic
MUTANTS
NERVOUS SYSTEM DISEASES
Peroxisome proliferator-activated receptor-γ
PPAR gamma - agonists
PPAR gamma - metabolism
RECEPTORS
Receptors, Glucocorticoid - blood
Receptors, Glucocorticoid - metabolism
Thiazolidinediones - administration & dosage
Thiazolidinediones - therapeutic use
TRANSGENIC MICE
title Rosiglitazone reverses memory decline and hippocampal glucocorticoid receptor down-regulation in an Alzheimer’s disease mouse model
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