Effects of Infantile Repeated Hyperglycemia on Neuronal Density of Hippocampus and Pentylentetrazol Induced Convulsions in Male Wistar Rats

Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJBMS-15-4_008

تاریخ نمایه سازی: 4 آبان 1400

Abstract:

Objective(s) High blood glucose induces molecular, cellular, morphological and behavioral changes in the brain. Metabolic disturbances, contribute to the hippocampus injury and development of partial focal seizures. The aim of this study was to investigate the effects of infantile repeated hyperglycemia on neuronal density of hippocampal CA۳region in newborn Wistar male rats and its effect on chemoconvulsant pentylentetrazol (PTZ) induced generalized seizures in adults. Materials and Methods Ten days old male Wistar rats were randomly divided into ۲ groups (n=۲۰ for each): hyperglycemic and control. Hyperglycemia was induced by intraperitoneal injections of ۲ g/kg dextrose solution, twice a day, for ۲ weeks. Control animals received saline solution in the same manner. Blood glucose was regularly measured. After that, the brains of rats from each group (n=۱۰) were removed for histological analysis of the CA۳ region of hippocampus by stereological method. Other animals (n=۱۰) were kept to grow older. Afterwards, seizure was induced in hyperglycemic and control adult rats, by an intraperitoneal injection of ۴۵ mg/kg PTZ solution and then latency of convulsions onset and severity of seizures for each group were recorded. Results Results showed that hippocampal neuronal density decreased significantly and susceptibility to PTZ induced convulsions increased in experimental animals. Conclusion The result determined that repeated increments in daily blood sugar levels in infantile period may damage neuronal structures of hippocampus and also make adults more susceptible to PTZ induced convulsions in adulthood period.

Authors

Malihe Moghadami

Department of Biology, Faculty of Sciences , Ferdowsi University of Mashhad, Iran

Ali Moghimi

Applied Research Centre for Neurofeedback and Neurobehavioral Sciences"(Aren) , Deptartment of Biology, Faculty of Science, Ferdowsi University of Mashhad (FUM), Mashhad, Iran

Razieh Jalal

Department of Chemistry, Faculty of Sciences , Ferdowsi University of Mashhad, Mashhad, Iran

Morteza Behnam-Rasouli

Department of Biology, Faculty of Sciences , Ferdowsi University of Mashhad, Iran

Naser Mahdavi-Shahri

Department of Biology, Faculty of Sciences , Ferdowsi University of Mashhad, Iran

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