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2016 ; 11
(5
): 1961-1970
Nephropedia Template TP
gab.com Text
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Memory-enhancing effect of aspirin is mediated through opioid system modulation
in an AlCl(3)-induced neurotoxicity mouse model
#MMPMID27168835
Rizwan S
; Idrees A
; Ashraf M
; Ahmed T
Exp Ther Med
2016[May]; 11
(5
): 1961-1970
PMID27168835
show ga
Neurodegenerative disorders such as Alzheimers disease (AD) are multifaceted and
there are currently a limited number of therapeutic strategies available to treat
them. Aspirin is known to act on multiple therapeutic targets and is a successful
anti-inflammatory agent in various tissues. The present study aimed to ascertain
the performance of aspirin when employed as a therapeutic agent to treat
neurodegeneration on novel targets, including opioid system genes, in an
AlCl(3)-induced neurotoxicity mouse model. The effects of two doses of aspirin (5
and 20 mg/kg aspirin for 12 days) were investigated in an AlCl(3)-induced
neurotoxicity mouse model (150 mg/kg AlCl(3) for 12 days). Neurological
improvements were assessed through different behavioral tests and the effects of
aspirin on opioid system gene expression levels were assessed by reverse
transcription-polymerase chain reaction. Both doses resulted in improvements in
cognitive behavior. A 5 mg/kg dose of aspirin was revealed to be effective for
spatial memory improvement (7.14±0.84 sec), whilst a 20 mg/kg dose was superior
for improving extinction learning (7.63±4.04%). Aspirin (5 mg/kg) also
significantly improved contextual memory (48.05±10.6%) when compared with the
AlCl(3)-treated group (1.49±0.62%; P<0.001). Aspirin was also observed to
significantly decrease ?-opioid receptor expression in the cortex (1.09±0.08 and
1.27±0.08, respectively) at both doses (5 and 20 mg/kg) when compared with the
AlCl(3)-treated group (3.69±1.43; P<0.05). Furthermore, aspirin at 5 mg/kg
significantly reduced expression of prodynorphin in the cortex (0.57±0.20) when
compared with the AlCl(3)-treated group (1.95±0.84; P<0.05). Notably, the effect
of aspirin was significant in the cortex but not in the hippocampus. In summary,
aspirin was effective in ameliorating the AD-like symptoms via the modulation of
opioid systems. However, additional studies are required to determine the long
term effects of aspirin on such conditions.