Effect of insulin and cinnamon extract on spatial memory and gene expression of GLUT۱, ۳, and ۴ in streptozotocin-induced Alzheimer’s model in rats
Publish place: Iranian Journal of Basic Medical Sciences، Vol: 26، Issue: 6
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJBMS-26-6_009
تاریخ نمایه سازی: 21 اردیبهشت 1402
Abstract:
Objective(s): Since diminished hippocampal insulin signaling leads to memory impairment, insulin resistance and hyperinsulinemia are probably associated with Alzheimer’s disease (AD). The effect of intracerebroventricular injection of insulin (Ins) and oral cinnamon extract (Cinn) on glucose transporter (GLUT) ۱, ۳, and ۴ gene expressions in the hippocampus and spatial memory in a streptozotocin (STZ)-induced AD rat model was investigated in the present study.Materials and Methods: Fifty-six adult male Sprague-Dawley rats (۲۸۰±۲۰ g) were allocated into eight distinct groups (n=۷) of five controls (negative, Ins, Cinn, Ins+Cinn, and STZs) and three treatments (STZ+ Ins, STZ+ Cinn, and STZ+ Ins + Cinn). Single dose STZ ۴ mg/kg (icv), Cinn at a dose of ۲۰۰ mg/ kg (orally for ۱۴ days), and Ins ۵ mIU/۵ µl (icv for ۱۴ days) were administered in the defined groups. To evaluate the behavioral performance the animals were subjected to the Morris Water Maze (MWM) test. The level of mRNA expression of GLUTs was evaluated by the Real time-PCR method. Results: In the STZ+Cinn+Ins group, the performance of animals in the MWM test was improved and the over-expression of GLUTs genes in hippocampal tissue was observed. The results of Ins and Cinn synergist treatment groups revealed improvement in the behavioral tests and gene expression compared with Ins and Cinn treatment groups (P<۰.۰۰۱).Conclusion: Administration of Ins and Cinn has a positive effect on the function of the AD rat model. To clarify the effect of Ins and Cinn extract on the GLUTs investigated in this study, it is essential to evaluate their influence on the protein levels.
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Authors
Elham Sajadi
Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Javad Sajedianfard
Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Saeid Hosseinzadeh
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Mahnaz Taherianfard
Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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