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Behavioural Neurology
Volume 2018, Article ID 2057219, 10 pages
Research Article

Cognitive-Enhancing Effect of a Hydroethanolic Extract of Crinum macowanii against Memory Impairment Induced by Aluminum Chloride in BALB/c Mice

1Drug and Toxicology Information Service (DaTIS), School of Pharmacy and Department of Clinical Pharmacology, College of Health Sciences, University of Zimbabwe, P.O. Box A 178, Avondale, Harare, Zimbabwe
2School of Pharmacy, University of Zimbabwe, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe

Correspondence should be addressed to Mohammed S. Jilani; moc.liamg@jbiqaas

Received 23 January 2018; Revised 16 August 2018; Accepted 27 August 2018; Published 4 October 2018

Academic Editor: Antonio Orlacchio

Copyright © 2018 Mohammed S. Jilani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Crinum macowanii is a bulbous plant indigenous to many parts of Southern Africa. Extracts of C. macowanii have gained interest since the discovery of various alkaloids, few of which possess acetylcholinesterase inhibitory activity. The present study was performed to evaluate the effect of a crude hydroethanolic extract of C. macowanii against aluminum chloride-induced memory impairment in mice using the Morris water maze and the novel object recognition task. C. macowanii (10, 20, and 40 mg/kg p.o) was administered daily for five weeks, while donepezil (3 mg/kg p.o) was used as the positive control. C. macowanii at a dosage of 40 mg/kg showed a significantly lower escape latency than the negative control () and was found to be comparable to donepezil 3 mg/kg in the Morris water maze test. C. macowanii at 40 mg/kg exhibited a significantly higher discrimination index than aluminum chloride-treated mice in the novel object recognition task. The results may support the usefulness of C. macowanii in the management of dementia and related illnesses.