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International Journal of Pharmacology
Year: 2016  |  Volume: 12  |  Issue: 2  |  Page No.: 52 - 65

Memory and Brain Neurotransmitter Restoring Potential of Hydroalcoholic Extract of Ipomoea aquatica Forsk on Amyloid Beta Aβ (25-35) Induced Cognitive Deficits in Alzheimer’s Mice

D. Sivaraman, P. Panneerselvam and P. Muralidharan    

Abstract: Alzheimer’s disease is a progressive neurodegenerative disorder primarily manifesting as a loss of memory, senile dementia, intra neuronal neurofibrillary tangle formation and cerebral parenchyma deposition of the β-amyloid protein in the form of amyloid plaques is the most stereotypic cognitive and neuropathological hallmarks of AD. The present study was designed to determine the ameliorating effect of hydroalcoholic extract of Ipomoea aquatica (HAEIA) on amyloid beta (Aβ) 25-35-induced cognitive deficits and oxidative stress in mice. Animals were treated with HAEIA for periods of 4 weeks dose-dependently (200 and 400 mg kg–1) then received a single Intra Cerebro Ventricular (ICV) injection of Aβ 25-35 (10 μg/mouse). Cognitive behavioral changes in the mice were evaluated using step down inhibitory avoidance, object recognition test, y-maze, hole board, elevated plus maze and water-maze tests. Brian level neurotransmitter such as dopamine, noradrenaline serotonin, glutamate and metabolic enzymes like acetylcholineserase, monoamine oxidase A and B estimated by using spectrofluorimeter technique. Results obtained from the study indicate that HAEIA at the dose of 400 mg kg–1 significantly ameliorated the cognitive and memory deficits caused by ICV injection of Aβ 25-35. The acetyl cholinesterase, monoamine oxidase and glutamate activity in the brain was lower in HAEIA supplemented groups than the Aβ-injected group. The HAEIA significantly improves the level of serotonin, dopamine, nor-adrenaline in treatment group when compare to Aβ-injected group. In conclusion plant like ipomoea auatica often served has a valuable lead for the clinical management of AD with minimal side effects.

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