scholarly journals Repeated moderate-dose ethanol bouts impair cognitive function in Wistar rats

2011 ◽  
Vol 17 (1) ◽  
pp. 132-140 ◽  
Author(s):  
Alexander Kuzmin ◽  
Sture Liljequist ◽  
Jennifer Meis ◽  
Vladimir Chefer ◽  
Toni Shippenberg ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Wistar Rats ◽  
Moderate Dose

scholarly journals Effects of 1.5 and 4.3 GHz microwave radiation on cognitive function and hippocampal tissue structure in Wistar rats

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruiqing Zhu ◽  
Hui Wang ◽  
Xinping Xu ◽  
Li Zhao ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Microwave Radiation ◽  
Structural Damage ◽  
Wistar Rats ◽  
Tissue Structure ◽  
Single Frequency ◽  
Hippocampal Tissue ◽  
Radiation Group ◽  
Morris Water Maze Task ◽  
Group 10

AbstractPrevious studies have shown that single-frequency microwave radiation can lead to cognitive decline in rats. However, few studies have focused on the combined effects of irradiation with different frequencies of microwaves. Our research aimed to investigate the effects of 1.5 GHz and 4.3 GHz microwave radiation, singly and in combination, on cognitive function and hippocampal tissue structure in rats. A total of 140 male Wistar rats were randomly divided into 4 groups: the S group (sham radiation group), L10 group (10 mW/cm2 1.5 GHz group), C10 group (10 mW/cm2 4.3 GHz band group) and LC10 group (10 mW/cm2 1.5 and 4.3 GHz multi-frequency radiation group). For 1–28 days after microwave radiation, we analyzed the average escape latency for the Morris water maze task, electroencephalograms, change in hippocampal tissue structure and ultrastructure, content of the Nissl body in the hippocampus, and activities of lactate dehydrogenase and succinate dehydrogenase. Compared to the S group, all exposure groups showed varying degrees of learning and memory decline and hippocampal structural damage. The results showed that 1.5 GHz and 4.3 GHz microwave radiation was able to induce cognitive impairment and hippocampal tissue damage in rats and combined radiation with both frequencies caused more serious injuries, but none of these damaging effects varied with microwave frequency.

scholarly journals ENHANCING COGNITIVE FUNCTION OF HEALTHY WISTAR RATS WITH AQUEOUS EXTRACT OF Centella asiatica

2019 ◽  
Vol 1 (2) ◽  
pp. 37-45
Author(s):  
Ayeshah A Rosdah ◽  
Evi Lusiana ◽  
Muhammad Reagan ◽  
Abdurrahman Akib ◽  
Fadhila Khairunnisa ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Aqueous Extract ◽  
Wistar Rats ◽  
Centella Asiatica ◽  
The Novel ◽  
Novel Object ◽  
Treatment Groups ◽  
Acetylcholine Content ◽  
High Preference ◽  
Brain Acetylcholine

Background: Centella asiatica (L.) Urb is a native herb from Asian countries such as India, China, and Indonesia. This herb has been widely used as a cure for various diseases. However, studies investigating the aqueous extract of Centella asiatica as a nootropic in healthy individuals are still very limited.Objective: This study aims to investigate the potential of aqueous extract of Centella asiatica in enhancing cognitive function of healthy male Wistar rats.Methods: Rats were randomly allocated to four treatment groups, i.e. without treatment and aqueous Centella asiatica extract at doses of 200, 400 and 800 mg/kg. To determine enhancement of cognitive function, novel object recognition (NOR) test was conducted after the course of treatment. Acetylcholine content was assessed by enzyme-linked immunosorbent assay.Results: There was a significantly high preference index towards the novel object in the NOR test in groups treated with 200 mg/kg and 800 mg/kg of the aqueous extract compared to control. This was further confirmed by a significant increase of brain acetylcholine content in rats treated with 200 mg/kg of the extract.Conclusion: Therefore, this study confirms that the aqueous extract is effective in enhancing cognitive performance of healthy Wistar rats.

scholarly journals Pengaruh Pemberian Alkohol terhadap Gambaran Histopatologik Aorta Tikus Wistar (Rattus norvegicus) yang Diinduksi Margarin

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Kevin C. Kamalo ◽  
Lily L. Loho ◽  
Maria K. Sambuaga
Keyword(s):  
Wistar Rats ◽  
Day Treatment ◽  
Foam Cells ◽  
Positive Control ◽  
Negative Control ◽  
Trans Fat ◽  
Moderate Dose ◽  
Alcohol Administration ◽  
Atherosclerotic Lesions ◽  
Experimental Laboratory

Abstract: Margarine is a kitchen ingredient that contains trans fat which plays an important role in the formation of atherosclerosis. Alcohol is one of the compounds that can slow down the formation of foam cells which are the beginning of atherosclerotic lesions. This study was aimed to determine the effect of alcohol administration on the aortic histopathological features of Wistar rats induced by margarine. This was an experimental laboratory study. Samples were 20 Wistar rats divided into 4 groups, as follows: negative control (KN), given pellet only; positive control (KP), given pellet and margarine 5 g per day; treatment 1 (P1), given pellet, margarine 5 g, and wine (14% of alcohol) 0.18 ml per day; and treatment 2 (P2), given pellet, margarine 5 g, and wine 0.36 ml per day. All samples were terminated at day 29. Rat aortas were prepared for microscopic slides. The results showed that foam cells were found in the aortic layers. The highest number of foam cells was found in KP group, followed by P1 group, meanwhile P2 group had the lowest number of foam cells. Conclusion: In the aortas of Wistar rats given wine in moderate dose concomitantly with margarine (P1 and P2 groups), the numbers of foam cells were less than in Wistar rats that were given margarine only (KP group).Keywords: wine, histopathology of aorta, atherosclerosis, margarine Abstrak: Margarin merupakan bahan dapur yang mengandung lemak trans yang sangat berperan dalam pembentukan aterosklerosis. Alkohol adalah salah satu senyawa yang dapat memperlambat pembentukkan sel busa yang merupakan awal dari lesi aterosklerosis. Penelitian ini bertujuan untuk mengetahui pengaruh dari pemberian alkohol terhadap gambaran histopatologik aorta tikus Wistar yang diinduksi margarin. Jenis penelitian ialah eksperimental laboratorik. Sampel penelitian ialah 20 ekor tikus Wistar yang dibagi atas 4 kelompok: kontol negatif (KN), hanya diberikan pelet; kontrol positif (KP) diberikan pelet dan margarin 5 gr per hari; perlakuan 1 (P1) diberikan pelet, margarin 5 gr dan minuman anggur (kandungan alkohol 14%) 0,18 ml per hari; dan perlakuan 2 (P2) diberikan pelet dan margarin 5 gr serta minuman anggur 0,36 ml per hari. Semua sampel diterminasi pada hari ke-29, dan aorta tikus diambil untuk sediaan mikroskopik. Hasil pengamatan histopatologik mendapatkan sel busa pada lapisan-lapisan aorta dengan jumlah tertinggi pada kelompok KP, kemudian P1, dan paling sedikit pada P2. Simpulan: Pada tikus Wistar yang diberikan minuman anggur dosis moderat dan margarin secara bersamaan (P1 dan P2) terlihat sel busa yang lebih sedikit dibandingkan dengan tikus Wistar yang hanya diberikan margarine (KP).Kata kunci: alkohol, histopatologik aorta, aterosklerosis, margarin

scholarly journals Single Mild Traumatic Brain Injury Induces Persistent Disruption of the Blood-Brain Barrier, Neuroinflammation and Cognitive Decline in Hypertensive Rats

2019 ◽  
Vol 20 (13) ◽  
pp. 3223 ◽  
Author(s):  
Nikolett Szarka ◽  
Luca Toth ◽  
Andras Czigler ◽  
Zoltan Kellermayer ◽  
Zoltan Ungvari ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Cognitive Function ◽  
Cognitive Decline ◽  
Blood Brain Barrier ◽  
Wistar Rats ◽  
Brain Trauma ◽  
Brain Barrier ◽  
Hypertensive Rats ◽  
Mild Tbi

Traumatic brain injury (TBI) induces blood-brain barrier (BBB) disruption, which contributes to secondary injury of brain tissue and development of chronic cognitive decline. However, single mild (m)TBI, the most frequent form of brain trauma disrupts the BBB only transiently. We hypothesized, that co-morbid conditions exacerbate persistent BBB disruption after mTBI leading to long term cognitive dysfunction. Since hypertension is the most important cerebrovascular risk factor in populations prone to mild brain trauma, we induced mTBI in normotensive Wistar and spontaneously hypertensive rats (SHR) and we assessed BBB permeability, extravasation of blood-borne substances, neuroinflammation and cognitive function two weeks after trauma. We found that mTBI induced a significant BBB disruption two weeks after trauma in SHRs but not in normotensive Wistar rats, which was associated with a significant accumulation of fibrin and increased neuronal expression of inflammatory cytokines TNFα, IL-1β and IL-6 in the cortex and hippocampus. SHRs showed impaired learning and memory two weeks after mild TBI, whereas cognitive function of normotensive Wistar rats remained intact. Future studies should establish the mechanisms through which hypertension and mild TBI interact to promote persistent BBB disruption, neuroinflammation and cognitive decline to provide neuroprotection and improve cognitive function in patients with mTBI.

scholarly journals The Efficacy of Sauropus androgynus Leaves Extract To Improve Cognitive Function in Wistar Rats Induced Alzheimer’s

2018 ◽  
Vol 2 (3) ◽  
pp. 35-44
Author(s):  
Rachmat Hidayat ◽  
Raden Ayu Adelia Safitri ◽  
Tungki Pratama Umar ◽  
Arindi Maretzka
Keyword(s):  
Cognitive Function ◽  
Wistar Rats ◽  
Control Group ◽  
Amyloid Formation ◽  
Alzheimer Dementia ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Background Sauropus androgynus leaves is the substance which has the potency to prevent degenerative processes. Sauropus androgynus leaves has flavonoid as the main component. Flavonoid has antioxidant and anti neuro-inflammation that can be used to prevent Alzheimer dementia. Research purpose is knowing the effect of Sauropus androgynus leaves for the cognitive function and β-amyloid expression in the hippocampus of wistar rats. Methods Reseacrh was done by in vivo method, where male wistar rats (n=24) were distributed to six groups which consisting of four rats. Group 1: Normal control, group 2: positive control, group 3: standard treatment (B12 vitamin), group 4, 5 and 6 were give Sauropus androgynus leaves extract with the dose of 75 mg/kgBB, 150 mg/kgBB and 300 mg/kgBB, respectively for 28 days. Cognitive function was evaluated by t-maze test, where hippocampal β-amyloid expression was tested by immunohistochemistry. Results Time differences (day 0-28), alternation ratio distinction (day 0-28) and β-amiloid expression were: group 1 (1,84 second; 0,23 unit; 0,518%), group 2 (56,78 second; -0,42 unit; 40,036%), group 3 (34,46 second; -0,25 unit; 33,08%), group 4 (32,83  second; -0,09 unit; 28,88%), group 5 (-3,91 second; 0,42 unit; 14,728%), group 6 (24,25 second; 0,42 unit; 9,4%). Conclusion Sauropus androgynus leaves extract at the dose of 150 mg/kgBB and 300 mg/kgBB can maintain cognitive function by decreasing hippocampal β-amyloid formation.

Ultrastructural Investigation of Spontaneous Pituitary Adenomas in Aging Sprague-Dawley Rats

1982 ◽  
Vol 40 ◽  
pp. 216-217
Author(s):  
D. J. McComb ◽  
J. Beri ◽  
F. Zak ◽  
K. Kovacs
Keyword(s):  
Microscopic Study ◽  
Pituitary Adenomas ◽  
Wistar Rats ◽  
Microscopic Level ◽  
Sprague Dawley ◽  
Prolactin Cells ◽  
Light Microscopic Level ◽  
Ultrastructural Investigation ◽  
Sprague Dawley Rats ◽  
Long Evans

Investigation of the spontaneous pituitary adenomas in rat have been limited mainly to light microscopic study. Furth et al. (1973) described them as chromophobic, secreting prolactin. Kovacs et al. (1977) in an ul trastructural investigation of adenomas of old female Long-Evans rats, found that they were composed of prolactin cells. Berkvens et al. (1980) using immunocytochemistry at the light microscopic level, demonstrated that some spontaneous tumors of old Wistar rats could contain GH, TSH or ACTH as well as PRL.

Light and electron microscopic investigation of adenohypophyses of germfree, food-restricted, and germfree-food restricted aging, male lobund-wistar rats

1988 ◽  
Vol 46 ◽  
pp. 352-353
Author(s):  
G. Ilse ◽  
K. Kovacs ◽  
N. Ryan ◽  
T. Sano ◽  
L. Stefaneanu ◽  
...  
Keyword(s):  
Wistar Rats ◽  
Microscopic Investigation ◽  
Electron Microscopic Investigation ◽  
Aging Male ◽  
Sprague Dawley ◽  
Electron Microscopic ◽  
Sprague Dawley Rats ◽  
Old Rats ◽  
Ad Libitum ◽  
Microscopic Findings

Germfree state and food restriction have been shown to increase life span and delay tumor occurrence in rats. We report here the histologic, immunocytochemical and electron microscopic findings of adenohypophyses of aging, male Lobund-Wistar rats raised at Lobund Laboratories. In our previous study, the morphologic changes in the adenohypophyses of old rats have been extensively investigated by histology, immunocytochemistry and electron microscopy. Lactotroph adenomas were frequent in Long-Evans and Sprague-Dawley rats, whereas gonadotroph adenomas were frequent in Sprague-Dawley and Wistar rats.Male Lobund-Wistar rats were divided into four groups: 1) conventional, which were raised under normal non-germfree environment and received food ad libitum; 2) germfree-food ad libitum; 3) conventional environment-food restricted and 4) germfree-food restricted. The adenohypophyses were removed from 6-month-, 18-month- and 30-month-old rats. For light microscopy, adenohypophyses were fixed in formalin and embedded in paraffin.

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