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A new approach for Alzheimer's disease treatment through P-gp regulation via ibuprofen.
Pathology, Research and Practice 2018 November
This study was aimed to investigate whether ibuprofen could alter the P-glycoprotein expression and function under Alzheimer's Disease condition and whether this alteration was induced by the inhibition of inflammatory reaction. APP/PS1 mice were used as AD model mice and ibuprofen-treated AD mice were given ibuprofen for 5 months. Then, Abcb1a/1b mRNA levels and P-gp expression were evaluated by qRT-PCR and western blot. Abcb1 mRNA levels were significantly reduced in AD mice compared to control mice, and it could be restored by ibuprofen treatment. Meanwhile, P-gp expression result showed a similar trend. Aβ plaques in cerebral cortices and hippocampus were investigated via immunohistochemical, and the results revealed that Aβ plaques were reduced in ibuprofen-treated AD mice compared with the AD mice, indicated that P-gp function may be recovered by ibuprofen treatment. qRT-PCR and ELISA were used to determined TNF-α, IL-1β, IL-6 and NF-κB levels. The results demonstrated that TNF-α, IL-1β mRNA levels and NF-κB expression were all significantly upregulated in AD mice in comparison with the control mice, and ibuprofen treatment could suppress the increase of inflammatory factors. In conclusion, the P-gp expression and function were suppressed in AD condition by activating inflammatory reaction, and then causing the Aβ efflux decreased. However, upregulating P-gp could increase the Aβ efflux in further to treat AD via inhibiting the inflammatory factors expression.
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