Acetylcholinesterase Inhibitor Improves Learning and Memory Impairment Induced by Toxoplasma gondii Infection
-
Hossein MAHMOUDVAND
,
Vahid SHEIBANI
,
Hossein KESHAVARZ
,
Saeedeh SHOJAEE
,
Khadijeh ESMAEELPOUR
,
Naser ZIAALI
Abstract
Background: Here, we established the mouse models of chronic toxoplasmosis by T. gondii Tehran strain to provide a good understanding about defining the possible association between T. gondii exposure and learning and memory impairments. Moreover, as secondary objective of the present study, we hypothesized whether administration of an acetylcholinesterase (AChE) inhibitor could reduce learning and memory impairments induced by T. gondii infection.
Methods: Twenty-four male BALB/c mice were used to establishment of latent toxoplasmosis. The animal model of Toxoplasma infection was established by the intraperitoneal inoculation of 20-25 tissue cysts from Tehran strain of T. gondii. Donepezil (2 mg/kg) an AChE inhibitor to treat Alzheimer disease was injected intraperitoneally once a day for two weeks starting from post-infection day 90. Morris water maze (MWM) task was used to assay spatial learning and short term spatial memory in all groups. One-way ANOVA with Tukey’s post-hoc test was used to assess differences between experimental groups. P<0.05 was considered statistically significant.
Results: Toxoplasma infection impaired spatial leaning and short term spatial memory of the infected BALB/c mice, whereas donepezil, an AChE inhibitor, improved impairments induced by Toxoplasma infection.
Conclusion: T. gondii infection through increasing AChE reduces the level of Acetylcholine (Ach) and consequently affects learning and memory activity in infected hosts, whereas, donepezil as an AChE inhibitor improves these impairments by restoring ACh levels at synapses of neurons in brain.Hill D, Dubey J. Toxoplasma gondii: transmission, diagnosis and prevention. Clin Microbiol Infect. 2002; 8(10): 634-640.
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| Issue | Vol 11 No 2 (2016) | |
| Section | Original Article(s) | |
| Keywords | ||
| Donepezil Maze learning Memory Spatial learning Toxoplasma gondii Toxoplasmosis | ||
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