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2017 ; 292
(9
): 3720-3728
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English Wikipedia
Iso-?-acids, Bitter Components of Beer, Prevent Inflammation and Cognitive
Decline Induced in a Mouse Model of Alzheimer s Disease
#MMPMID28087694
Ano Y
; Dohata A
; Taniguchi Y
; Hoshi A
; Uchida K
; Takashima A
; Nakayama H
J Biol Chem
2017[Mar]; 292
(9
): 3720-3728
PMID28087694
show ga
Alongside the rapid growth in aging populations worldwide, prevention and therapy
for age-related memory decline and dementia are in great demand to maintain a
long, healthy life. Here we found that iso-?-acids, hop-derived bitter compounds
in beer, enhance microglial phagocytosis and suppress inflammation via activation
of the peroxisome proliferator-activated receptor ?. In normal mice, oral
administration of iso-?-acids led to a significant increase both in CD11b and
CD206 double-positive anti-inflammatory type microglia (p < 0.05) and in
microglial phagocytosis in the brain. In Alzheimer's model 5xFAD mice, oral
administration of iso-?-acids resulted in a 21% reduction in amyloid ? in the
cerebral cortex as observed by immunohistochemical analysis, a significant
reduction in inflammatory cytokines such as IL-1? and chemokines including
macrophage inflammatory protein-1? in the cerebral cortex (p < 0.05) and a
significant improvement in a novel object recognition test (p < 0.05), as
compared with control-fed 5xFAD mice. The differences in iso-?-acid-fed mice were
due to the induction of microglia to an anti-inflammatory phenotype. The present
study is the first to report that amyloid ? deposition and inflammation are
suppressed in a mouse model of Alzheimer's disease by a single component,
iso-?-acids, via the regulation of microglial activation. The suppression of
neuroinflammation and improvement in cognitive function suggests that iso-?-acids
contained in beer may be useful for the prevention of dementia.
|*Beer
[MESH]
|Acids/*chemistry
[MESH]
|Administration, Oral
[MESH]
|Alzheimer Disease/genetics/*metabolism
[MESH]
|Amyloid beta-Peptides/metabolism
[MESH]
|Animals
[MESH]
|Anti-Inflammatory Agents/chemistry
[MESH]
|Blood-Brain Barrier
[MESH]
|CD11b Antigen/metabolism
[MESH]
|Cell Separation
[MESH]
|Cells, Cultured
[MESH]
|Chemokine CCL3/metabolism
[MESH]
|Chromatography, High Pressure Liquid
[MESH]
|Chromatography, Liquid
[MESH]
|Cognitive Dysfunction/*prevention & control
[MESH]