Learning and memory enhancing properties of coenzyme Q10 in amnestic albino Wistar rats

2020 ◽  
pp. 1
Author(s):  
Priya Gandigawad ◽  
Radhika S ◽  
Ravi Sori
Keyword(s):  
Learning And Memory ◽  
Coenzyme Q10 ◽  
Wistar Rats ◽  
Memory Enhancing

Ameliorative Potential of Glycyrrhiza glabra extracts on Memory Impairments in Stress Triggered Rats

2020 ◽  
Vol 06 ◽  
Author(s):  
Parul Kamboj ◽  
Ajit Kumar Thakur
Keyword(s):  
Antioxidant Enzyme ◽  
Learning And Memory ◽  
Acetylcholinesterase Activity ◽  
Molecular Study ◽  
Glycyrrhiza Glabra ◽  
Learning Ability ◽  
Future Research ◽  
Standard Drug ◽  
Behavioral Alteration ◽  
Memory Enhancing

Background: Glycyrrhiza glabra Linn. (Family: Fabaceae) has been known to very useful medicinal plant in the Traditional Medicinal Systems from the centuries. With ethnopharmacological values, it is well-reported plant for their traditional uses for anti-inflammatory, antioxidant, anxiolytic, expectorant activities, and antidepressant activities. Objective: Although it is described for memory enhancing activity, the present study was focused to examine the comparative effect of Glycyrrhiza glabra extracts viz. flavonoid rich (GGFE) and glycyrrhizin rich (GGGE) in stress triggered rats and to provide future research insight for this herbal drug, for which no scientific justification has been reported till now. Methods: Male Wister rats divided into 7 different groups (n= 6 per group) were given chronic foot-shock stress for 21 successive days with scheduled administration of the extracts (50 and 100 mg/kg) and standard drug (10 mg/kg) for 28 days. Elevated Plus Maze, Rectangular Maze, Morris Water Maze, and Locomotor activity were performed to test behavioral alteration and learning ability of stressed rats. Further, rats were sacrificed to assay acetylcholinesterase activity and antioxidant activity in brain samples for the mechanistic role in learning and memory. Results: Extracts of Glycyrrhiza glabra were indicated a significant alteration in stress induced learning and memory deficiency in behavioral parameters studied. These extracts were also modulated significant changes in acetylcholinesterase and antioxidant enzyme activity to improve the learning and memory of stressed rats. Conclusions: It is concluded that both extracts of Glycyrrhiza glabra (GGFE and GGGE) possess memory enhancing property in stress triggered rats. Moreover, these comparative results provided information and confirmed the high potential of GGGE in comparison to GGFE might be due to rich glycyrrhizin content present in GGGE responsible for acetylcholinesterase and antioxidant enzyme modulatory activity. Therefore, GGGE could be used as a promising lead for further mechanistic and molecular study for defining the role of glycyrrhizin of Glycyrrhiza glabra.

scholarly journals Does Long-Term High Fat Diet Always Lead to Smaller Hippocampi Volumes, Metabolite Concentrations, and Worse Learning and Memory? A Magnetic Resonance and Behavioral Study in Wistar Rats

PLoS ONE ◽  
2015 ◽  
Vol 10 (10) ◽  
pp. e0139987 ◽  
Author(s):  
Zuzanna Setkowicz ◽  
Agata Gaździńska ◽  
Joanna J. Osoba ◽  
Karolina Karwowska ◽  
Piotr Majka ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Learning And Memory ◽  
High Fat Diet ◽  
Wistar Rats ◽  
Behavioral Study ◽  
High Fat ◽  
Metabolite Concentrations

Effect of Gmelina arborea on learning and memory in amnesia-induced and non-amnesia groups of albino Wistar rats

2019 ◽  
Vol 30 (5) ◽  
Author(s):  
Ravi Sori ◽  
Basavaraj Poojar ◽  
Nandan Hodlur ◽  
Priya Gandigawad
Keyword(s):  
Learning And Memory ◽  
Wistar Rats ◽  
Experimental Studies ◽  
Intellectual Ability ◽  
Screening Tests ◽  
Control Group ◽  
Significant Activity ◽  
Gmelina Arborea ◽  
Memory Processes ◽  
Anti Oxidant

Abstract Background The brain is the centre of the nervous system in all vertebrates. The central cholinergic pathways play a prominent role in learning and memory processes. Dementia is a mental disorder characterized by the loss of intellectual ability, which invariably involves the impairment of memory. The crude extracts of the Gmelina arborea plant are reported to possess wound-healing, anti-diarrheal, anti-oxidant, anti-diabetic, and anti-ulcer property. The present study was designed to evaluate the effects of G. arborea on learning and memory in albino Wistar rats. Methods A total of 36 healthy rats were selected for the study, which were divided in to six groups. Standard screening tests such as the elevated plus maze (EPM), Morris water maze (MWM), and step-down passive avoidance (SDA) tests were used for testing the learning and memory processes. Results Gmelina arborea at higher doses (1000 mg/kg) showed statistically significant activity in EPM, MWM, and SDA tests for assessing the learning and memory paradigms when compared to the control group in amnesia-induced and non-amnesia groups of rats. Conclusions This is the first ever study to report the effects of G. arborea on learning and memory in both amnesia-induced and non-amnesia groups of rats. Our results show that G. arborea potentiates the processes of learning and memory. The observed pharmacological activities should be further evaluated by detailed experimental studies and revalidated by clinical trials.

scholarly journals Role of Synaptic Structural Plasticity in Impairments of Spatial Learning and Memory Induced by Developmental Lead Exposure in Wistar Rats

PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e115556 ◽  
Author(s):  
Yongmei Xiao ◽  
Hongjun Fu ◽  
Xiaojie Han ◽  
Xiaoxia Hu ◽  
Huaiyu Gu ◽  
...  
Keyword(s):  
Learning And Memory ◽  
Spatial Learning ◽  
Lead Exposure ◽  
Wistar Rats ◽  
Structural Plasticity ◽  
Spatial Learning And Memory

scholarly journals Evaluation of the effect of Ferula asafoetida Linn. gum extract on learning and memory in Wistar rats

2012 ◽  
Vol 44 (1) ◽  
pp. 82 ◽  
Author(s):  
Shalini Adiga ◽  
Priyanka Bhat ◽  
Abhishek Chaturvedi ◽  
KL Bairy ◽  
Shobha Kamath ◽  
...  
Keyword(s):  
Learning And Memory ◽  
Wistar Rats ◽  
Ferula Asafoetida

scholarly journals BIOACTIVITY-GUIDED ISOLATION OF MEMORY-ENHANCING COMPOUND FROM CHLOROFORM EXTRACT OF ROOTS OF PLUMBAGO ZEYLANICA LINN.

2018 ◽  
Vol 11 (7) ◽  
pp. 497
Author(s):  
Vaibhav Uplanchiwar ◽  
Gupta Mk ◽  
Rupesh K Gautam
Keyword(s):  
Learning And Memory ◽  
Cognitive Disorders ◽  
Solvent System ◽  
Chloroform Extract ◽  
Acetyl Cholinesterase ◽  
Plumbago Zeylanica ◽  
Water Test ◽  
Chloroform Methanol ◽  
Brain Acetylcholine ◽  
Memory Enhancing

Aim: The main aim of our study is to isolate the active compound from roots of Plumbago zeylanica Linn. by bioactivity-guided isolation and evaluate its memory-enhancing effect by Morris water maze.Methods: Roots were extracted by successive solvent methods by petroleum ether, chloroform, methanol, butanol, and finally, water. Chloroform extract was selected for isolation, and plumbagin was isolated by hexane and ethyl acetate as solvent system. Plumbagin was evaluated by Morris water test, and brain acetylcholine esterase level was measured.Result: Plumbagin showed a significant decrease of escape latency and increase of time spent in target quadrant by mice in Morris water maze indicating improvement of learning and memory. It also significantly decreases the cholinesterase level in the brain.Conclusion: Learning and memory of mice doubtless may be through embarrassment of brain acetyl cholinesterase activity and through involvement of GABA-benzodiazepine pathway. Further detailed study is required to explore the other possible mechanisms for the management of cognitive disorders.

EFFECT OF DROTAVERINE, A PHOSPHODIESTERASE 4 INHIBITOR IN SCOPOLAMINE-INDUCED COGNITIVE IMPAIRMENT IN RATS

2020 ◽  
pp. 99-102
Author(s):  
KAYALVIZHI MK
Keyword(s):  
Smooth Muscle ◽  
Cognitive Impairment ◽  
Learning And Memory ◽  
Neurodegenerative Disorder ◽  
Enhancing Effect ◽  
Group I ◽  
Y Maze ◽  
Significant Difference ◽  
Group Ii ◽  
Memory Enhancing

Objective: Cognitive impairment (CI) is a progressive neurodegenerative disorder and causes significant dementia in the elderly. Intracellular cyclic AMP (cAMP) signaling has been well established in the mediation of memory. Phosphodiesterases (PDEs) are enzymes that catalyze the hydrolysis of cAMP and/or cyclic GMP. Drotaverine is a novel non-anticholinergic smooth muscle antispasmodic which acts by inhibiting PDE-4. It is now clinically used in smooth muscle spasms (intestinal, biliary and renal colic, irritable bowel syndrome, uterine spasms, etc.) without anticholinergic side effects. Since Drotaverine has PDE4 inhibition property, its role in learning and memory was evaluated in this study and found that it has memory enhancing effect comparable with donepezil in scopolamine-induced CI in rats. Methods: Learning and memory were assessed with two behavioral models, namely, elevated plus maze (EPM) and Y maze. CI was produced by scopolamine. Rats were divided into five groups, Group I treated with normal saline, Group II treated with scopolamine, and Groups III, IV, and V were treated with donepezil, Drotaverine, and both, respectively. Results: The result analysis revealed significant differences in transfer latency in EPM performance between Groups III, IV, V and Group II (***p<0.001). The results of spontaneous alternation in Y maze show that there was a significant difference among all the treatments groups (p<0.001). Conclusion: Drotaverine has promising memory enhancing effect in CI induced by scopolamine in rats. Further clinical trials are needed to prove this finding which has been elicited in animal models.

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