RGD Reference Report - Immunohistochemical analysis of tau phosphorylation and astroglial activation with enhanced leptin receptor expression in diet-induced obesity mouse hippocampus. - Rat Genome Database

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Immunohistochemical analysis of tau phosphorylation and astroglial activation with enhanced leptin receptor expression in diet-induced obesity mouse hippocampus.

Authors: Koga, S  Kojima, A  Kuwabara, S  Yoshiyama, Y 
Citation: Koga S, etal., Neurosci Lett. 2014 Jun 13;571:11-6. doi: 10.1016/j.neulet.2014.04.028. Epub 2014 Apr 28.
RGD ID: 10411891
Pubmed: PMID:24785100   (View Abstract at PubMed)
DOI: DOI:10.1016/j.neulet.2014.04.028   (Journal Full-text)

Accumulating evidence indicates that obesity is an independent risk factor for developing Alzheimer disease (AD). Recent studies have shown that diet-induced obesity (DIO) enhances AD-related pathologies in transgenic mouse models of the disease. DIO increases amyloid beta (Abeta) deposition in amyloidogenic transgenic mice and enhances tau phosphorylation in tau transgenic mice. However, it remains unclear whether DIO also enhances AD-related pathological processes in wild-type (WT) mice. In this study, we examined the effects of DIO on Abeta and tau pathology in WT mice using immunohistochemistry. In addition, we evaluated the protective effect of voluntary exercise on the DIO-induced pathological changes. DIO caused tau phosphorylation and astroglial activation in the hippocampus in WT mice. Interestingly, these changes were associated with enhanced astrocytic leptin receptor (LepR) expression and mild microgliosis, but not Abeta accumulation. Although phosphorylated tau staining was only observed in the hippocampus, astrogliosis and microgliosis were present in both the amygdala and hippocampus. However, no apparent neuronal loss was observed. Voluntary exercise prevented these DIO-induced pathological changes. Our results demonstrate for the first time that DIO causes tau phosphorylation and that astrocytic LepR might be involved in the pathological process in WT mouse hippocampus. Our findings also suggest that physical exercise is a promising strategy for the prevention of AD in patients with obesity.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
LEPRHumanobesity  ISOLepr (Mus musculus)protein:increased expression:hippocampus and astrocyteRGD 
LeprRatobesity  ISOLepr (Mus musculus)protein:increased expression:hippocampus and astrocyte:RGD 
LeprMouseobesity  IEP protein:increased expression:hippocampus and astrocyteRGD 

Objects Annotated

Genes (Rattus norvegicus)
Lepr  (leptin receptor)

Genes (Mus musculus)
Lepr  (leptin receptor)

Genes (Homo sapiens)
LEPR  (leptin receptor)


Additional Information