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Amirpour M, Mirshekar MA, Sedaghat G, Montazerifar F, Shourestani S, Arabmoazzen S, Naghizadeh M. The effects of green tea on cognitive impairments in the rat model of Alzheimer's disease: protection against inflammatory and oxidative damage. Nutr Neurosci 2021; 25:2659-2667. [PMID: 34802394 DOI: 10.1080/1028415x.2021.2003946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by a decrement in the number of synapses, an increment in the production of oxygen free radicals and inflammatory cytokines. Green tea (GT) plays a defensive performance in different neurodegenerative conditions, such as cognition deficit. This study investigated the neuroprotective effect of green tea (GT) on cognitive disorder, inflammation, and oxidative stress in the streptozotocin (STZ)- induced AD model. MATERIALS AND METHODS The rats were divided into four groups: (1) Control, (2) GT, (3) Alz, and (4) GT + Alz. AD was induced by the injection of STZ (3 mg/kg, bilaterally, ICV). Morris water maze and passive avoidance tests were done to evaluate the memory and learning of rats. Biochemical parameters were measured with specialized ELISA kits. RESULTS Briefly, data analysis revealed that GT administration for 21 days improved memory impairment induced by the injection of STZ. Pretreatment with GT enhanced time spent in the goal quarter and reduced latency time and path length. Furthermore, pretreatment with GT prevented the increment of malondialdehyde (MDA) concentration in STZ-treated rats. As a pro-inflammatory cytokine, tumor necrosis factor- α (TNF-α) concentration was suppressed with the GT pretreatment. Total antioxidant capacity was increased after GT administration in rats treated compared with AD rats. CONCLUSIONS GT pretreatment attenuated STZ-induced learning and memory impairment through the suppression of TNF-α and MDA concentrations. The beneficial effects of GT on memory could be attributed to its protective effects on oxidative defenses.
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Affiliation(s)
- Mahsa Amirpour
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohammad Ali Mirshekar
- Clinical Immunology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.,Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Gohar Sedaghat
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Farzaneh Montazerifar
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Shadi Shourestani
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Saiedeh Arabmoazzen
- Deputy of Research and Technology, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mehrdad Naghizadeh
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
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Naghizadeh M, Mirshekar MA, Montazerifar F, Saadat S, Shamsi Koushki A, Jafari Maskouni S, Afsharfar M, Arabmoazzen S. Effects of quercetin on spatial memory, hippocampal antioxidant defense and BDNF concentration in a rat model of Parkinson's disease: An electrophysiological study. Avicenna J Phytomed 2021; 11:599-609. [PMID: 34804897 PMCID: PMC8588960 DOI: 10.22038/ajp.2021.18526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Quercetin is one of the most popular flavonoid with protective effects against neural damages in Parkinson's disease (PD). We assessed the effect of quercetin administration on memory and motor function, hippocampal oxidative stress and brain-derived neurotrophic factor (BDNF) level in a 6-OHDA-induced Parkinson's rat model. MATERIAL AND METHODS The animals were divided into the following five groups (n=8): control, sham-surgery (sham), lesion (PD), and lesion animals treated with quercetin at doses of 10 (Q10) and 25 (Q25) mg/kg. For induction of a model of PD, 6-OHDA was injected into the striatum of rats. The effects of quercetin were investigated on spatial memory, hippocampal BDNF and malondialdehyde (MDA) levels, and total antioxidant capacity (TAC). Spatial memory was assessed by Morris water maze test, and the neuronal firing frequency in hippocampal dentate gyrus (HDG) was evaluated by single-unit recordings. RESULTS Mean path length and latency time, rotational behavior and hippocampal MDA concentration were significantly increased, while time spent in the goal quadrant, swimming speed, spike rate, and hippocampal levels of TAC and BDNF were significantly decreased in the PD group compared to the sham group (p<0.01 to p<0.001). Quercetin treatment significantly enhanced time spent in goal quadrant (p<0.05), swimming speed (p<0.001) and spike rate (p<0.01), improved hippocampal TAC (p<0.05 to p<0.001) and BDNF (p<0.01 to p<0.001) level, and decreased mean path length (p<0.001), latency time (p<0.05 to p<0.001), rotational behavior and hippocampal MDA concentration (p<0.05). CONCLUSION The cognitive-enhancing effect of quercetin might be due to its antioxidant effects in the hippocampus.
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Affiliation(s)
- Mehrdad Naghizadeh
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohammad Ali Mirshekar
- Clinical Immunology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Farzaneh Montazerifar
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Saeideh Saadat
- Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ali Shamsi Koushki
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Saber Jafari Maskouni
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Maryam Afsharfar
- Student Research Committee, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Food Sciences and Nutrition, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Saiedeh Arabmoazzen
- Deputy of Research and Technology, Zahedan University of Medical Sciences, Zahedan, Iran
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Arabmoazzen S, Mirshekar MA. Evaluation of the effects of metformin as adenosine monophosphate-activated protein kinase activator on spatial learning and memory in a rat model of multiple sclerosis disease. Biomed Pharmacother 2021; 141:111932. [PMID: 34323699 DOI: 10.1016/j.biopha.2021.111932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/26/2021] [Accepted: 07/14/2021] [Indexed: 10/20/2022] Open
Abstract
In patients with multiple sclerosis (MS) disease, cognitive deficits have been detected because of destruction of hippocampus. Cognitive impairment is one of the common signs in MS. Recent studies showed that metformin (Met) has wide-ranging effects in the treatment of diseases. Here, we have tried to study the preservative effects of Met as adenosine monophosphate-activated protein kinase (AMPK) activator on the hippocampus dentate gyrus (DG) neuronal firing pattern, motor coordination, and learning & memory loss following MS induction. The MS induction was done by local ethidium bromide (EB) injection into the rat hippocampus. Then, rats were treated with Met (200 mg/kg) for two weeks. Spatial memory and learning status were assessed using Morris water maze. A neuronal single-unit recording was measured from hippocampus DG. After decapitation, the bilateral hippocampi separated to measure malondialdehyde (MDA). Treatment with Met ameliorated latency times and path lengths (P < 0.05, P < 0.01, P < 0.001 in 1th, 2th, 3th and 4th days) in the Met + MS group respectively. The percent of total time spent in goal quarter and the average number of spikes/bin were decreased significantly in MS rats compared with the sham group (p < 0.001) but significantly increased in the metformin-treated MS group (Met + MS), (p < 0.01, p < 0.001). Met treatment in rats with MS significantly reduced the concentration of MDA, which is an indicator of lipid peroxidation compared to untreated groups. These observations show that increase of neuronal activity, sensory-motor coordination, and improvement of spatial memory in MS rats treated with Met appears via an increment of AMPK.
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Affiliation(s)
- Saiedeh Arabmoazzen
- Deputy of Research and Technology, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohammad Ali Mirshekar
- Clinical Immunology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
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Mirshekar MA, Arabmoazzen S, Parivar K, Sarkaki A. Effect of Chronic Noise Stress on Serum Glucose and Lipids and Morphology of Langerhans Islets in Neonatal Rats. ACTA ACUST UNITED AC 2015. [DOI: 10.17795/zjrms-2188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Arabmoazzen S, Sarkaki A, saki G, Mirshekar MA. Antidiabetic effect of honey feeding in noise induced hyperglycemic rat: involvement of oxidative stress. Iran J Basic Med Sci 2015; 18:745-51. [PMID: 26557962 PMCID: PMC4633456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 07/22/2015] [Indexed: 12/03/2022]
Abstract
OBJECTIVES In this study the effect of oral administration of honey on serum glucose, lipids, stress oxidative markers, and morphology of langerhans islets in noise induced hyperglycemic rats was investigated. MATERIALS AND METHODS Male Wistar rats were divided into control, hyperglycemic, honey treated control, and honey treated hyperglycemic groups. For induction of hyperglycemia, noise stress was used. Serum glucose, triglyceride (TG), total cholesterol, low density lipoprotein (LDL), and high density lipoprotein (HDL)-cholesterol levels were determined before the study and at 4(th) and 8(th) weeks after the study. Markers of oxidative stress in brain were also measured. Morphology of langerhans islets in four groups was evaluated using Gomori staining method. RESULTS Treatment of noise induced hyperglycemic rats with honey produced a hypoglycemic effect and appropriate changes regarding serum lipids in treated diabetic group at 4(th) and 8(th) weeks as compared to the control group. Meanwhile, honey treatment significantly ameliorated the increased malondialdehyde (MDA) content and reduced the activity of superoxide dismutase (SOD) in brain. Histology of langerhans islets in hyperglycemic group showed a lower number and granularity of beta cells; honey treatment produced beneficial change in this respect. CONCLUSION Oral administration of honey in experimental model of diabetes showed a significant hypoglycemic effect and led to appropriate changes in serum lipid profiles.
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Affiliation(s)
- Saiedeh Arabmoazzen
- Deptartment of Biology, Basic Sciences Faculty, Sciences and Researches, Azad University, Tehran, Iran
| | - Alireza Sarkaki
- Deptartment of Physiology, Physiology Research Center, School of Medicine, Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ghasem saki
- Deptartment of Anatomy, Physiology Research Center, School of Medicine, Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Ali Mirshekar
- Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
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