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 Ziziphus jujuba (Rhamnaceae) Alleviates Working Memory Impairment and Restores Neurochemical Alterations in the Prefrontal Cortex of D-Galactose-Treated Rats

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Antoine K. Kandeda ◽  
Danide Nguedia ◽  
Espoir R. Ayissi ◽  
Jonas Kouamouo ◽  
Théophile Dimo
Keyword(s):  
Working Memory ◽  
Prefrontal Cortex ◽  
Aqueous Extract ◽  
Spontaneous Alternation ◽  
Memory Impairment ◽  
Distilled Water ◽  
The Novel ◽  
Novel Object ◽  
Y Maze ◽  
Ziziphus Jujuba

Alzheimer’s disease is a progressive cognitive dysfunction. However, pharmacological treatments are symptomatic and have many side effects, opening the opportunity to alternative medicine. This study investigated the antiamnesic effect of the aqueous extract of Ziziphus jujuba on D-galactose-induced working memory impairment in rats. Impairment of working memory was induced by subcutaneous (s.c.) injection of D-galactose (350 mg/kg/day) to rats for 21 days. These animals were then subjected to object recognition and Y-maze tests. Rats with confirmed memory impairment were treated per os (p.o.) with tacrine (10 mg/kg), aspirin (20 mg/kg, p.o.), extract (41.5, 83, and 166 mg/kg, p.o.), and distilled water (10 mL/kg, p.o.) daily for 14 days. At the end of the treatments, alteration in working memory was assessed using the above paradigms. Afterward, these animals were euthanized, and cholinergic, proinflammatory, and neuronal damage markers were analyzed in the prefrontal cortex. Rats administered D-galactose and treated with distilled water had impaired working memory (evidenced by decreased time spent on the novel object and discrimination index) and decreased spontaneous alternation in the Y-maze. D-galactose also decreased the levels of acetylcholinesterase and acetylcholine and increased the level of glial fibrillary acidic protein, ionized calcium-binding adapter molecule 1, tumor necrosis factor-alpha (TNF-α), interleukin 1 beta (IL-1β), interleukin 6 (IL-6), and interferon-gamma (IFN-γ). Treatment with the extract (166 mg/kg) reversed the time spent on the novel object and the discrimination index. It equally increased the percentage of spontaneous alternation. Neurochemical analysis revealed that the extract markedly alleviated acetylcholinesterase activity and neuroinflammation. These observations were corroborated by the reduction in neuronal loss. Taken together, these results suggest that Ziziphus jujuba aqueous extract possesses an antiamnesic effect. This effect seems to involve cholinergic and anti-inflammatory modulations. This, therefore, claims using this plant in the treatment of dementia in Cameroon subject to further studies and trials.

Response to novelty in rats tested in isolation and in pairs: focus on exploration and play

2008 ◽  
Vol 39 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Łukasz Tanaś ◽  
Rafał Stryjek
Keyword(s):  
Wistar Rats ◽  
Social Play ◽  
Experimental Manipulation ◽  
Exploratory Activity ◽  
Experimental Chamber ◽  
The Novel ◽  
Novel Object ◽  
Social Exploration ◽  
Familiar Environment ◽  
Play Interaction

Response to novelty in rats tested in isolation and in pairs: focus on exploration and play The main goal of the study was to compare investigatory responses towards novelty in 20 Wistar rats divided into two experimental groups (solitary exploration vs. exploration in pairs). Additionally, relationship between novelty and social play/interaction was analyzed in the dyad group. Procedure involved placing animals in an experimental chamber during fifteen, six minute trials on successive days of the study. On the eleventh session a new object was introduced. The results are summarized within several behavioral categories. Investigatory responses of rats in dyad to novel object in familiar environment were not quantitatively different, than those of isolated animals. The animals from both groups responded to the novel object by focusing their exploratory activity on the source of new stimulation. Amount of social play and social exploration was influenced by the experimental manipulation with important sex differences present.

scholarly journals Bagian Biomedis Fakultas Kedokteran Gigi, Universitas Jember Jember, Indonesia

2011 ◽  
Vol 10 (1) ◽  
pp. 26
Author(s):  
I Dewa Ayu Ratna Dewanti
Keyword(s):  
Traditional Medicine ◽  
Aqueous Extract ◽  
Wistar Rats ◽  
The Other ◽  
Control Group ◽  
Aqueous Extracts ◽  
Treatment Groups ◽  
Neem Leaves ◽  
Significant Difference ◽  
Phagocytosis Activity

Neem is one of the traditional medicine known by society as immunomodulator. On the other hand, 80% of oralinfection diseases is caused by C. albicans. This research is aimed to explain the phagocytosis activities on wistarrats which were inoculated with C. albicans and fed with neem leaves. There are 5 groups, namely control group(KO)with no treatment, the other treatment groups were classified into 4 groups. First group (KP1)was inoculatedwith C. albicans only. KP2 was fed with 50 mg/day/kg BW aqueous extracts from neem leaves, then inoculated withC. albicans start from day 8-21. KP3 was fed with 100 mg/day/kg BW aqueous extract from neem leaves, theninoculated with C. albicans start from day 8-21. KP4 was fed with 200 mg/day/kg BW aqueous extract from neemleaves, then inoculated with C. albicans start from day 8-21. On day 22, the tongue was swabbed for each group,then cut for immunohistochemistry preparation. The study that there was significant difference showed that therewere different results computed using anova, HSD test, and linier regression. The conclusion was neem leavesincreased the phagocytosis activity of wistar rats, inoculated with C.albicans.

scholarly journals Pain neuromodulation exerted by Ruta graveolens aqueous extract in experimental models of nociception/ Neuromodulação da dor exercida pela Ruta graveolens extrato aquoso em modelos experimentais de nocicepção

2021 ◽  
Vol 7 (4) ◽  
pp. 43667-43682
Author(s):  
Flávio Klinpovous Kerppers ◽  
Maria Elvira Ribeiro Cordeiro ◽  
Tatiane Budniak Mazur ◽  
Heron Bittencourt ◽  
Karoline Penteado da Luz ◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Wistar Rats ◽  
Pain Threshold ◽  
Antinociceptive Effect ◽  
Positive Control ◽  
Experimental Models ◽  
Antinociceptive Activity ◽  
Ruta Graveolens ◽  
Treatment Groups ◽  
Tail Immersion

Introduction: The use of medicinal plants for therapeutic purposes has been common practice since antiquity. Ruta graveolens L., commonly known as rue, has been shown to have antiparasitic, antioxidant, antibacterial and allelopathic activity. Objective: The objective was to investigate the antinociceptive effect of rue, as well as the mechanisms behind this effect. Materials and Methods: The sample consisted of 40 male Norvegicus (Wistar) rats, randomly divided into a positive control and three treatment groups administered Ruta graveolens L. aqueous extract at the following doses: 50 mg/kg, 100 mg/kg or 500 mg/kg, p.o. The experimental models of nociception used in this study to assess effectiveness of the treatments were the formalin and capsaicin tests. Five days prior to nociceptive challenges, the tail immersion assay was conducted to determine baseline pain threshold. Results: Antinociceptive activity was observed at Ruta graveolens L. aqueous extract concentrations of 50 mg/kg and 100mg/kg. 500 mg/kg induced pro-nociceptive activity with activation of the L-arginine-oxide-nitric system. Conclusion: These results suggest Ruta graveolens L. aqueous extract antinociceptive activity, and possible antagonism towards receptors

Biochemical and Haemopoietic Effects of Aqueous Extract of Gnetum Africanum (Ukazi) on Male and Female Albino Wistar Rats

2018 ◽  
Vol 8 (4) ◽  
pp. 061-065
Author(s):  
F.N OGUWIKE ◽  
◽  
I.C IFEDI ◽  
C.N DIM ◽  
C.P IGWEDIBIA ◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Wistar Rats ◽  
Male And Female

Changes of IL-4 and IFN-g expression in monocytes and T-helper lymphocytes while modeling of systemic juvenile idiopathic arthritis in Wistar rats

2018 ◽  
pp. 61-69
Author(s):  
В.Н. Сахаров ◽  
П.Ф. Литвицкий ◽  
Е.И. Алексеева ◽  
Н.А. Маянский ◽  
Р.Ш. Закиров
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Peripheral Blood Mononuclear Cells ◽  
Wistar Rats ◽  
Mononuclear Cells ◽  
Systemic Juvenile Idiopathic Arthritis ◽  
Control Group ◽  
Peripheral Blood Mononuclear ◽  
Treatment Groups ◽  
Blood Mononuclear Cells ◽  
T Helpers

Цель исследования - изучение перепрограммирования мононуклеарных лейкоцитов на модели системного ювенильного идиопатического артрита (сЮИА), воспроизводимой у крыс Wistar с использованием полного адъюванта Фрейнда и липополисахарида. Методика. сЮИА воспроизведен у 6-месячных крыс-самцов Wistar. На 40-е сут. эксперимента животные были разделены на 3 группы: 1-я группа - контроль; 2-я - группа доксициклина; 3-я - группа дексаметазона. Взятие проб крови у животных проводили на нулевые, 41-е и 55-е сут. Мононуклеарные клетки периферической крови выделяли гравиметрически, после чего окрашивали их на маркеры и внутриклеточные цитокины. Дифференцировали моноциты (CD3-CD4+) и Т-хелперы (CD3+CD4+). Анализировали динамику внутриклеточной экспрессии интерлейкина IL-4 (рассматривали как маркер про-М2 фенотипа, так как в случае выделения из клетки ИЛ-4 служит стимулятором М2 поляризации макрофагов) и IFN-g (как маркер про-М1 фенотипа) по данным проточной цитофлуориметрии. Применяли непараметрический статистический тест Mann-Whitney-Wilcoxon в программе R для статистической обработки данных. Результаты и заключение. При моделировании сЮИА выявлено закономерное изменение фенотипа моноцитов. Применение же доксициклина и дексаметазона приводило к более ранней поляризации их по про-М2-пути в отношении моноцитов (на 41-е сут.) в сравнении с контролем. Про-М1 эффект (на 55-е сут., в сравнении с контролем) выявлен также в группах доксициклина и дексаметазона. У животных разных групп обнаружены характерные динамические изменения внутриклеточной экспрессии цитокинов. Важно, что различная направленность поляризации фенотипа при сЮИА и применении препаратов наблюдается не только у моноцитов, но и у Т-хелперов. The study objective was to evaluate targeted reprogramming of peripheral blood mononuclear cells in systemic juvenile idiopathic arthritis (sJIA) modeled in 6-month-old male Wistar rats by co-administration of complete Freund’s adjuvant and lipopolysaccharide. Methods. On day 40 of the experiment, rats were divided into three groups: control, doxycycline, and dexamethasone groups. Blood samples were collected on days 0, 41, and 55. Peripheral blood mononuclear cells were isolated gravimetrically and stained for markers and cytokines. Monocytes (CD3-CD4+) and T-helpers (CD3+CD4+) were differentiated as target cells. IL-4 was considered a marker for the pro-M2 phenotype since IL-4 can activate M2 macrophage polarization; IFN-g was considered a marker for the pro-M1 phenotype. Time-related changes in the intracellular expression of IL-4 and IFN-g were studied using flow cytometry. Data were analyzed using nonparametric statistical tests (Mann-Whitney-Wilcoxon) in the R environment for statistical computing. Results and conclusions. Monocytes (like macrophages) underwent reprogramming during the development of modeled sJIA disease. In monocytes of doxycycline and dexamethasone treatment groups, pro-M2 effects were observed earlier (day 41) than in the control group. Pro-M1 effects were observed in monocytes of doxycycline and dexamethasone groups on day 55, as compared with the control group. Characteristic time-related changes of intracellular cytokine expression were described for different groups. Importantly, the differently directed phenotype polarization was observed in sJIA and treatment groups for both monocytes and T-helpers.

scholarly journals Antioxidant Evaluation of the Aqueous Extract of Hulls of Campsiandra laurifolia in Colitis Induced by Acetic Acid in Wistar Rats

2021 ◽  
Vol 41 (02) ◽  
pp. 138-144
Author(s):  
Lucas Petitemberte de Souza ◽  
Henrique Sarubbi Fillmann ◽  
Sandielly Rebeca Benitez da Fonseca ◽  
Marilda da Silva Brasil ◽  
Norma Anair Possa Marroni ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Phenolic Compounds ◽  
Aqueous Extract ◽  
Wistar Rats ◽  
Antioxidant Activities ◽  
Experimental Colitis ◽  
Anal Pressure ◽  
Antioxidant Power ◽  
Significance Level ◽  
Sphincter Anal

AbstractDue to the ethnopharmacological use of Campsiandra laurifolia (Fabaceae), popularly known as Acapurana, to treat wounds and ulcers, associated with the lack of alternative treatments for intestinal inflammations such as ulcerative colitis (UC), the present work sought to characterize its phytochemical and antioxidant activities, and to evaluate remedial action in experimental colitis with acetic acid. Phytochemical analyzes were performed through qualitative and quantitative colorimetric tests of the main secondary metabolites. In the colitis model, 24 male Wistar rats aged ± 60 days old were used, divided into 4 groups: Control (CO) control + aqueous extract of C. laurifolia 50 mg/kg (CO + A50); Colitis (CL); and Colitis + aqueous extract of C. laurifolia 50 mg/kg (CL + A50). Measurement of sphincter anal pressure and histological tests of the large intestine, lipoperoxidation (LPO), enzyme activity of superoxide dismutase (SOD), and levels of glutathione (GSH) were performed. For statistical analysis, the oxidative stress (OS) results were expressed as means ± standard error, adopting a significance level of p < 0.05. The screening indicated the presence of flavonoids, saponins and tannins in the extract, with high levels of phenolic compounds and tannins, and was related to high antioxidant capacity. In the histological analysis, the CL group presented loss of the crypts, edema and inflammatory infiltrate. The use of C. laurifolia extract restructured the crypts, decreased edema and increased sphincter anal pressure, with a decrease in LPO, SOD, and an increase in GSH. It is suggested that the use of C. laurifolia extract reduces OS due to its antioxidant power conferred by the phenolic compounds present in the extract.

scholarly journals Does Hyperoxia Restrict Pyrenean Rock Lizards Iberolacerta bonnali to High Elevations?

Diversity ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 200
Author(s):  
Eric J. Gangloff ◽  
Sierra Spears ◽  
Laura Kouyoumdjian ◽  
Ciara Pettit ◽  
Fabien Aubret
Keyword(s):  
High Elevation ◽  
Conservation Strategy ◽  
The Novel ◽  
Thermal Physiology ◽  
Treatment Groups ◽  
Thermal Performance Curve ◽  
And Performance ◽  
Thermal Preferences ◽  
High Elevations ◽  
Intense Radiation

Ectothermic animals living at high elevation often face interacting challenges, including temperature extremes, intense radiation, and hypoxia. While high-elevation specialists have developed strategies to withstand these constraints, the factors preventing downslope migration are not always well understood. As mean temperatures continue to rise and climate patterns become more extreme, such translocation may be a viable conservation strategy for some populations or species, yet the effects of novel conditions, such as relative hyperoxia, have not been well characterised. Our study examines the effect of downslope translocation on ectothermic thermal physiology and performance in Pyrenean rock lizards (Iberolacerta bonnali) from high elevation (2254 m above sea level). Specifically, we tested whether models of organismal performance developed from low-elevation species facing oxygen restriction (e.g., hierarchical mechanisms of thermal limitation hypothesis) can be applied to the opposite scenario, when high-elevation organisms face hyperoxia. Lizards were split into two treatment groups: one group was maintained at a high elevation (2877 m ASL) and the other group was transplanted to low elevation (432 m ASL). In support of hyperoxia representing a constraint, we found that lizards transplanted to the novel oxygen environment of low elevation exhibited decreased thermal preferences and that the thermal performance curve for sprint speed shifted, resulting in lower performance at high body temperatures. While the effects of hypoxia on thermal physiology are well-explored, few studies have examined the effects of hyperoxia in an ecological context. Our study suggests that high-elevation specialists may be hindered in such novel oxygen environments and thus constrained in their capacity for downslope migration.

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