scholarly journals Comparison between touchscreen operant chambers and water maze to detect early prefrontal dysfunction in mice

2020 ◽  
Author(s):  
Lore Van den Broeck ◽  
Annerieke Sierksma ◽  
Pierre Hansquine ◽  
David Thonnard ◽  
Zsuzsanna Callaerts‐Vegh ◽  
...  
Keyword(s):  
Water Maze ◽  
Prefrontal Dysfunction

Using Fingers to Find the Platform: A Human Analogue of the Water Maze Task

2010 ◽  
Author(s):  
Douglas Wallace ◽  
Jenny Koppen ◽  
Eileah Loda ◽  
Megan Nail ◽  
Shawn Winter
Keyword(s):  
Water Maze ◽  
Maze Task ◽  
Water Maze Task

CONTEXTUAL LEARNING IN THE MORRIS WATER MAZE

2018 ◽  
pp. 13-20
Author(s):  
Е.И. Захарова ◽  
З.И. Сторожева ◽  
А.Т. Прошин ◽  
М.Ю. Монаков ◽  
А.М. Дудченко
Keyword(s):  
Morris Water Maze ◽  
Choline Acetyltransferase ◽  
Water Maze ◽  
Synaptic Membranes ◽  
Projection Neurons ◽  
Synaptic Organization ◽  
Acetyltransferase Activity ◽  
Cholinergic Interneurons ◽  
Late Stages ◽  
Choline Acetyltransferase Activity

Цель - исследование холинергической синаптической организации функций обучения и памяти у крыс с разными когнитивными способностями. Методы. Крыс обучали на пространственной обстановочной модели в водном лабиринте Морриса. Через 2-3 сут. после окончания тренировок животных декапитировали, из неокортекса и гиппокампа с помощью центрифугирования выделяли субфракции синаптических мембран и синаптоплазмы легких и тяжелых синаптосом. В синаптических субфракциях определяли активность ключевого фермента холинергических нейронов холинацетилтрансферазы (ХАТ). Сравнивали результаты тестирования (время достижения скрытой платформы) и активность фермента у способных и неспособных к обучению крыс. Результаты. Были выявлены: 1) различия в холинергической организации исследованных функций в процессе обучения у способных и неспособных к обучению крыс, в том числе: положительные корреляции активности ХАТ в синапсах проекционных нейронов неокортекса у способных крыс со временем достижения платформы на промежуточных этапах обучения и в синапсах проекционных нейронов гиппокампа у неспособных крыс на позднем этапе обучения; разнонаправленные корреляции активности ХАТ в синапсах, предположительно, интернейронов гиппокампа (фракция тяжелых синаптосом) у способных и неспособных крыс на начальном и позднем этапах обучения; 2) индивидуальность холинергической организации функций на всех этапах обучения. Выводы. Полученные данные свидетельствуют в пользу представлений о специфике холинергической организации функций пространственного обстановочного обучения у крыс с выраженными и слабыми способностями к обучению, а также избирательной роли холинергических интернейронов гиппокампа на исходном этапе обучения и в консолидации памяти. In order to expand the knowledge about neuronal organization of the cognitive functions required for understanding plastic processes in the brain, we investigated the cholinergic synaptic organization of learning and memory functions in rats with different cognitive abilities. Methods. Rats were trained on a contextual situation model in the Morris water maze. At 2-3 days after the end of training, animals were decapitated, and subfractions of synaptic membranes and synaptoplasm of light and heavy synaptosomes were isolated from the cortex and the hippocampus by centrifugation. In synaptic subfractions, activity of the key enzyme of cholinergic neurons, choline acetyltransferase, was measured. We compared the test results (latent period to reach the hidden platform) and the enzyme activity in capable (lower quartile) and incapable of learning rats (upper quartile). Results. The following was found: 1) differences in the cholinergic organization of studied functions in capable and uncapable of learning rats during training, including: positive correlations of choline acetyltransferase activity in synapses of projection neurons in the cortex of capable rats with latency to reach the platform at intermediate stages of training and in the hippocampus ofincapable rats at late stages of training; multidirectional correlations of choline acetyltransferase activity in synapses of hippocampal, presumably, interneurons (heavy synaptosomes) in capable and incapable rats at early and late stages of training; 2) distinctness of the cholinergic organization of functions at all stages of training. Conclusions. The study demonstrated for the first time a specificity of the cholinergic organization of functions in spatial situational learning of rats with strong and poor learning abilities and a selective role of hippocampal cholinergic interneurons at the initial stage of learning and in memory consolidation.

Effect of alkaloid extracted from Huperzia phlegmaria on cognitive deficits scopolamine-induced in mice

2020 ◽  
Vol 16 ◽  
Author(s):  
Dang Kim Thu ◽  
Dao Thi Vui ◽  
Nguyen Thi Ngoc Huyen ◽  
Nguyen Thi Thanh Binh ◽  
Nguyen Thi Huyen ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Mouse Brain ◽  
Cognitive Deficits ◽  
Inhibitory Activity ◽  
Water Maze ◽  
Ache Activity ◽  
Y Maze ◽  
Ache Inhibitory Activity ◽  
Kinetic Inhibition ◽  
Brain Tissues

Background: Huperzia phlegmaria has been used for the treatment of neurological disorder. Alkaloids are main bioactive compounds found in Huperzia phlegmaria. We aimed to investigate the acetylcholinesterase (AChE) inhibitory activity in vitro of Huperzia phlegmaria alkaloid extract (HpAE) and protective effects on mice which were induced cognitive deficits by scopolamine. Methods: AChE inhibitory activity and kinetic inhibition mechanism was investigated by Ellman's assay. Mice were administrated orally HpAE (30 mg/kg and 60 mg/kg) for fourteen days, and injected scopolamine at a dose of 1 mg/kg intraperitoneally for four days to induce cognitive impairment. The Y-maze and the Morris water maze were used for evaluating the memory behaviors. Acetylcholine (ACh) levels and AChE activity were measured in brain tissue. Glutathione peroxidase (GPx), superoxide dismutase (SOD) activities, and malondialdehyde (MDA) groups were also evaluated in the mouse brain tissues. Results: Our data showed that HpAE had the strong AChE inhibitory activity with an IC50 value of 5.12 ± 0.48 μg/mL in a concentration-dependent manner. Kinetic inhibition analysis demonstrated that HpPAE inhibited AChE followed the mixed inhibition type with Ki (representing the affinity of the enzyme and inhibitor) was 4.37 ± 0.35 µg/mL. Scopolamine induced the cognitive impairment in Morris Water Maze and Y-maze test along with reduced brain levels of ACh and antioxidant enzyme and increased AChE activity in mouse brain tissues. Treatment with HpAE at both dose (30 mg/kg and 60 mg/kg) decreased the SCP-induced cognitive impairment in both behavioral tests along with decreased acetylcholinesterase activity and MDA level, and increased ACh level and antioxidant enzyme in mouse brain tissues. Conclusion: Our results suggested that the HpAE at both dose (30 mg/kg and 60 mg/kg) may be used for prevent and treatment of Alzheimer’s disease.

β-1, 3-Glucan attenuated chronic unpredictable mild stress induced cognitive impairment in rodents via normalizing corticosterone levels

2020 ◽  
Vol 20 ◽  
Author(s):  
Saniya Hashim Khan ◽  
Sheraz Khan ◽  
Inamullah Khan ◽  
Narmeen Hashim
Keyword(s):  
Water Maze ◽  
Memory Impairment ◽  
Glucocorticoid Receptors ◽  
Therapeutic Potential ◽  
Mild Stress ◽  
Chronic Unpredictable Mild Stress ◽  
Neuroprotective Effects ◽  
Injurious Effect ◽  
Naturally Occurring ◽  
Dose Dependent

Background: Chronic stress elevates the cortisol beyond normal levels, which affects cognition including learning & memory. This injurious effect is primarily mediated via over excitation of metabotropic glucocorticoid receptors (mGR). Methods: The present study was aimed appraise the neuroprotective effects of naturally occurring molecule β-1,3-glucan by interfering with stress-cortisol-mGR axis. Our data of virtual screening (in silico) exhibited the promising interactions of βglucan with the mGR. Therefore, the study was extended to evaluate its efficacy (2.5, 5 and 10 mg/kg/ i.p) in an animal model of chronic unpredictable mild stress (CUMS, 28 days) induced memory impairment. Results: Results of the current study revealed the β-glucan provided dose dependent protection against deleterious effects of stress on learning and memory associated parameters observed in Morris water maze (MWM) task. At higher tested doses, it has also significantly antagonized the stress induced weight loss and corticosterone elevation. Conclusion: From these findings, it can be deduced that the β-glucan possesses therapeutic potential against stress induced memory impairment, and this effect can be attributed to its normalizing effect on corticosterone levels.

scholarly journals Beneficial effect of retigabine on memory in rats receiving ethanol

2020 ◽  
Author(s):  
Ewa Zwierzyńska ◽  
Agata Krupa-Burtnik ◽  
Bogusława Pietrzak
Keyword(s):  
Beneficial Effect ◽  
Fear Conditioning ◽  
Morris Water Maze ◽  
Water Maze ◽  
Experimental Models ◽  
Male Rats ◽  
Ethanol Administration ◽  
Free Access ◽  
Oral Gavage ◽  
The Impact

Abstract Background Retigabine belongs to the novel generation of antiepileptic drugs but its complex mechanism of action causes that the drug might be effective in other diseases, for instance, alcohol dependence. It is known that ethanol abuse impaired the function of brain structures associated with memory and learning such as the hippocampus. In our previous study, retigabine reduced hippocampal changes induced by ethanol in the EEG rhythms in rabbits. This study is focused on the impact of retigabine on memory processes in male rats receiving alcohol. Methods Memory was evaluated in various experimental models: Morris water maze, Contextual, and Cued Fear Conditioning tests. Retigabine was administered for 3 weeks directly to the stomach via oral gavage at a dose of 10 mg/kg. Rats received also 20% ethanol (5 g/kg/day in two doses) via oral gavage for 3 weeks and had free access to 5% ethanol in the afternoon and at night. Morris water maze was performed after 1 and 3 weeks of ethanol administration and after 1 week from the discontinuation of ethanol administration. Contextual and Cued Fear Conditioning tests were carried out after 24 h and 72 h of alcohol discontinuation. Results The drug significantly decreased ethanol-induced memory disturbances during alcohol administration as well as slightly improved learning processes after the discontinuation of ethanol administration. Conclusions This beneficial effect of retigabine-ethanol interaction on memory may be a relevant element of the drug’s impact on the development of addiction.

Task solving by procedural strategies in the Morris water maze

2003 ◽  
Vol 78 (4-5) ◽  
pp. 785-793 ◽  
Author(s):  
Elisabetta Baldi ◽  
Carlo Ambrogi Lorenzini ◽  
Bucherelli Corrado
Keyword(s):  
Morris Water Maze ◽  
Water Maze

scholarly journals Acute pre-operative ibuprofen improves cognition in a rat model for postoperative cognitive dysfunction

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Klaske Oberman ◽  
Iris Hovens ◽  
Jacco de Haan ◽  
Joana Falcao-Salles ◽  
Barbara van Leeuwen ◽  
...  
Keyword(s):  
Cognitive Dysfunction ◽  
Morris Water Maze ◽  
Rat Model ◽  
Gut Microbiome ◽  
Water Maze ◽  
Single Injection ◽  
Postoperative Cognitive Dysfunction ◽  
Aged Rats ◽  
Short Term ◽  
Term Memory

Abstract Background Inflammation is considered a key factor in the development of postoperative cognitive dysfunction (POCD). Therefore, we hypothesized that pre-operative anti-inflammatory treatment with ibuprofen would inhibit POCD in our rat-model. Methods Male Wistar rats of 3 or 23 months old received a single injection of ibuprofen (15 mg/kg i.p.) or were control handled before abdominal surgery. Timed blood and fecal samples were collected for analyses of inflammation markers and gut microbiome changes. Behavioral testing was performed from 9 to 14 days after surgery, in the open field, novel object- and novel location-recognition tests and Morris water maze. Neuroinflammation and neurogenesis were assessed by immune histochemistry after sacrifice on postoperative day 14. Results Ibuprofen improved short-term spatial memory in the novel location recognition test, and increased hippocampal neurogenesis. However, these effects were associated with increased hippocampal microglia activity. Whereas plasma cytokine levels (IL1-β, IL6, IL10, and TNFα) were not significantly affected, VEGF levels increased and IFABP levels decreased after ibuprofen. Long-term memory in the Morris water maze was not significantly improved by ibuprofen. The gut microbiome was neither significantly affected by surgery nor by ibuprofen treatment. In general, effects in aged rats appeared similar to those in young rats, though less pronounced. Conclusion A single injection of ibuprofen before surgery improved hippocampus-associated short-term memory after surgery and increased neurogenesis. However, this favorable outcome seemed not attributable to inhibition of (neuro)inflammation. Potential contributions of intestinal and blood-brain barrier integrity need further investigation. Although less pronounced compared to young rats, effects in aged rats indicate that even elderly individuals could benefit from ibuprofen treatment.

Zhuyu Annao decoction promotes angiogenesis in mice with cerebral hemorrhage by inhibiting the activity of PHD3

2021 ◽  
pp. 096032712110085
Author(s):  
L Wu ◽  
Y Hu ◽  
L Jiang ◽  
N Liang ◽  
P Liu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Signaling Pathway ◽  
Morris Water Maze ◽  
Cerebral Hemorrhage ◽  
Water Maze ◽  
Luciferase Reporter ◽  
Morris Water Maze Test ◽  
Therapeutic Effects ◽  
Vascular Endothelial ◽  
Behavioral Experiments

Some traditional Chinese decoctions, such as Zhuyu Annao, exert favorable therapeutic effects on acute cerebral hemorrhage, hemorrhagic stroke, and other neurological diseases, but the underlying mechanism remains unclear. This study aimed to determine whether Zhuyu Annao decoction (ZYAND) protects the injured brain by promoting angiogenesis following intracerebral hemorrhage (ICH) and elucidate its specific mechanism. The effect of ZYAND on the nervous system of mice after ICH was explored through behavioral experiments, such as the Morris water maze and Rotarod tests, and its effects on oxidative stress were explored by detecting several oxidative stress markers, including malondialdehyde, nitric oxide, glutathione peroxidase, and superoxide dismutase. Real-time quantitative RT-PCR and WB were used to detect the effects of ZYAND on the levels of prolyl hydroxylase domain 3 (PHD3), hypoxia-inducible factor-1α (HIF-1α), and vascular endothelial growth factor (VEGF) in the brain tissues of mice. The effect of ZYAND on the NF-κB signaling pathway was detected using a luciferase reporter gene. A human umbilical cord vascular endothelial cell angiogenesis experiment was performed to determine whether ZYAND promotes angiogenesis. The Morris water maze test and other behavioral experiments verified that ZYAND improved the neurobehavior of mice after ICH. ZYAND activated the PHD3/HIF-1α signaling pathway, inhibiting the oxidative damage caused by ICH. In angiogenesis experiments, it was found that ZYAND promoted VEGF-induced angiogenesis by upregulating the expression of HIF-1α, and NF-κB signaling regulated the expression of HIF-1α by inhibiting PHD3. ZYAND exerts a reparative effect on brain tissue damaged after ICH through the NF-κB/ PHD3/HIF-1α/VEGF signaling axis.

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