Protective effect of α-terpineol against impairment of hippocampal synaptic plasticity and spatial memory following transient cerebral ischemia in rats
محل انتشار: مجله علوم پایه پزشکی ایران، دوره: 19، شماره: 9
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 129
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شناسه ملی سند علمی:
JR_IJBMS-19-9_007
تاریخ نمایه سازی: 30 مهر 1400
چکیده مقاله:
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 ۵۰, ۱۰۰, and ۲۰۰ mg/kg, IP once daily for ۷ 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 (۱۰۰ mg/kg, IP) significantly decreased the escape latency during training trials (P<۰.۰۱). In addition, α-terpineol increased the number of crossings over the platform location and decreased average proximity to the target in probe trial (P<۰.۰۵). In electrophysiological recording, α-terpineol (۱۰۰ mg/kg) facilitated the induction of LTP in the hippocampus which was persistent over ۲ hr. α-Terpineol (۱۰۰ and ۲۰۰ 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.
کلیدواژه ها:
نویسندگان
Mahsa Moghimi
Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Siavash Parvardeh
Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Taraneh Moini Zanjani
Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Shiva Ghafghazi
School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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