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Combination of donepezil and gallic acid improves antioxidant status and cholinesterases activity in aluminum chloride-induced neurotoxicity in Wistar rats

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Abstract

The present study compared the effect of donepezil only and combination of donepezil and gallic acid on oxidative status and cholinesterase activity in the brain of Wistar rats administered AlCl3 for 60 days. Twenty-eight rats (180 – 200 g) were arbitrarily distributed into four groups of seven animals apiece. Group 1 served as normal control and received distilled water throughout the study. Group 2 animals received only AlCl3 throughout the study while animals in groups 3 and 4 were administered donepezil only (10 mg/kg) and combination of donepezil (10 mg/kg) and gallic acid (50 mg/kg), respectively, in addition to AlCl3. Treatments were administered orally by gavage. At the end of the study, animals were sacrificed and activities of acetylcholinesterase, butyrylcholinesterase, superoxide dismutase (SOD) and catalase as well as levels of malondialdehyde (MDA), total thiol and nitric oxide (NO) were evaluated in the brain. Histopathological study was conducted on the hippocampus of experimental animals. Results showed that AlCl3 significantly (p < 0.05) increased brain activities of cholinesterases and levels of MDA and NO with a concomitant decrease in total thiol level as well as activities of SOD and catalase. Donepezil only and combination of donepezil and gallic acid reversed these alterations. Also, combination of donepezil and gallic acid significantly (p < 0.05) improved antioxidant status better than donepezil only. It could be concluded that a synergy might exist between gallic acid and donepezil especially in ameliorating oxidative stress associated with AlCl3-induced neurotoxicity.

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The authors did not receive support from any organization for the submitted work.

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Obafemi TO and Afolabi BA designed the study; Owolabi OV, Omiyale BO and Rotimi D did most of the bench work; Ojo OA analyzed data; Onasanya A prepared the first draft of the manuscript; Adu IAI reviewed the final draft of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Tajudeen O. Obafemi.

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Ethical approval with number ABUAD/COS20/124.was obtained from Animal Care Committee of the Afe Babalola University Research Directorate, Ado-Ekiti, Nigeria.

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Obafemi, T.O., Owolabi, O.V., Omiyale, B.O. et al. Combination of donepezil and gallic acid improves antioxidant status and cholinesterases activity in aluminum chloride-induced neurotoxicity in Wistar rats. Metab Brain Dis 36, 2511–2519 (2021). https://doi.org/10.1007/s11011-021-00749-w

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  • DOI: https://doi.org/10.1007/s11011-021-00749-w

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