Protective effect of α-terpineol against impairment of hippocampal synaptic plasticity and spatial memory following transient cerebral ischemia in rats

Moghimi, Mahsa and Parvardeh, Siavash and Moini Zanjani, Taraneh and Ghafghazi, Shiva (2016) Protective effect of α-terpineol against impairment of hippocampal synaptic plasticity and spatial memory following transient cerebral ischemia in rats. Iranian Journal of Basic Medical Sciences, 19 (9). pp. 960-969.

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Abstract

Objective(s): Cerebral ischemia is often associated with cognitive impairment. Oxidative stress has a crucial role in the memory deficit following ischemia/reperfusion injury. α-Terpineol is a monoterpenoid with anti-inflammatory and antioxidant effects. This study was carried out to investigate the effect of α-terpineol against memory impairment following cerebral ischemia in rats. Materials and Methods: Cerebral ischemia was induced by transient bilateral common carotid artery occlusion in male Wistar rats. The rats were allocated to sham, ischemia, and α-terpineol-treated groups. α-Terpineol was given at doses of 50, 100, and 200 mg/kg, IP once daily for 7 days post ischemia. Morris water maze (MWM) test was used to assess spatial memory and in vivo extracellular recording of long-term potentiation (LTP) in the hippocampal dentate gyrus was carried out to evaluate synaptic plasticity. Malondialdehyde (MDA) was measured to assess the extent of lipid peroxidation in the hippocampus. Results: In MWM test, α-terpineol (100 mg/kg, IP) significantly decreased the escape latency during training trials (P<0.01). In addition, α-terpineol increased the number of crossings over the platform location and decreased average proximity to the target in probe trial (P<0.05). In electrophysiological recording, α-terpineol (100 mg/kg) facilitated the induction of LTP in the hippocampus which was persistent over 2 hr. α-Terpineol (100 and 200 mg/kg) also significantly lowered hippocampal MDA levels in rats subjected to cerebral ischemia. Conclusion: These findings indicate that α-terpineol improves cerebral ischemia-related memory impairment in rats through the facilitation of LTP and suppression of lipid peroxidation in the hippocampus.

Item Type: Article
Subjects: QV pharmacology
Divisions: Journals > Iranian J Basic Medical Sciences
Depositing User: ijbms ijbms
Date Deposited: 27 Sep 2017 16:59
Last Modified: 27 Sep 2017 16:59
URI: http://eprints.mums.ac.ir/id/eprint/5552

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