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2018 ; 18
(ä): 173-180
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Deficiency in the transcription factor NRF2 worsens inflammatory parameters in a
mouse model with combined tauopathy and amyloidopathy
#MMPMID30029164
Rojo AI
; Pajares M
; García-Yagüe AJ
; Buendia I
; Van Leuven F
; Yamamoto M
; López MG
; Cuadrado A
Redox Biol
2018[Sep]; 18
(ä): 173-180
PMID30029164
show ga
Chronic neuroinflammation is a hallmark of the onset and progression of brain
proteinopathies such as Alzheimer disease (AD) and it is suspected to participate
in the neurodegenerative process. Transcription factor NRF2, a master regulator
of redox homeostasis, controls acute inflammation but its relevance in low-grade
chronic inflammation of AD is inconclusive due to lack of good mouse models. We
have addressed this question in a transgenic mouse that combines amyloidopathy
and tauopathy with either wild type (AT-NRF2-WT) or NRF2-deficiency (AT-NRF2-KO).
AT-NRF2-WT mice died prematurely, at around 14 months of age, due to motor
deficits and a terminal spinal deformity but AT-NRF2-KO mice died roughly 2
months earlier. NRF2-deficiency correlated with exacerbated astrogliosis and
microgliosis, as determined by an increase in GFAP, IBA1 and CD11b levels. The
immunomodulatory molecule dimethyl fumarate (DMF), a drug already used for the
treatment of multiple sclerosis whose main target is accepted to be NRF2, was
tested in this preclinical model. Daily oral gavage of DMF during six weeks
reduced glial and inflammatory markers and improved cognition and motor
complications in the AT-NRF2-WT mice compared with the vehicle-treated animals.
This study demonstrates the relevance of the inflammatory response in
experimental AD, tightly regulated by NRF2 activity, and provides a new strategy
to fight AD.