Abstract
Objective and design
Alzheimer’s disease (AD) is associated with amyloid plaques (Aβ) and hyperphosphorylated tau protein tangles in the brain. We investigated the possible neuroprotective role of flavocoxid, a dual inhibitor of cyclooxygenases-1/2 (COX-1/2) and 5-Lipoxygenase (5-LOX), in triple-transgenic (3xTg-AD) mice.
Subjects
Mice were 3 months at the beginning of the study.
Treatment
Animals received once daily for 3-month saline solution or flavocoxid (20 mg/kg/ip).
Methods
Morris water maze was used to assess learning and memory. Histology was performed to evidence Aβ plaques and neuronal loss, while inflammatory proteins were determined by western blot analysis.
Results
Saline-treated 3xTg-AD mice showed an impairment in spatial learning and memory (assessed at 6 months of age), and increased expression of inflammatory and apoptotic molecules. Treatment of 3xTg-AD mice with flavocoxid reduced: (1) learning and memory loss; (2) the increased eicosanoid production and the phosphorylation level of amyloid precursor protein (APP-pThr668), Aβ 1–42, p-tau (pThr181), pERK, and the activation of the NLRP3 inflammasome; (3) Aβ plaques; and (4) neuronal loss, compared to saline-treated animals.
Conclusions
Pharmacological blockade of both COX-1/2 and 5-LOX was able to counteract the progression of AD by targeting pathophysiological mechanisms up- and downstream of Aβ and tau.
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Acknowledgements
The work was supported by Departmental fundings. Flavocoxid was a kind gift of Primus Pharmaceuticals Inc., Scottsdale, AZ.
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All applicable international, national, and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
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Bitto, A., Giuliani, D., Pallio, G. et al. Effects of COX1-2/5-LOX blockade in Alzheimer transgenic 3xTg-AD mice. Inflamm. Res. 66, 389–398 (2017). https://doi.org/10.1007/s00011-017-1022-x
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DOI: https://doi.org/10.1007/s00011-017-1022-x