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Background: Pain is a common stimulus that induces anxiety in both Animals and human beings. Aim and Objective: We have undertaken this study to evaluate the induction of anxiety in Wistar rats using hot plate method. Materials and Methods: 24 Wistar rats of either gender were used. Elevated plus maze (EPM) and light and dark arena (LDA) were used to evaluate the anxiety and hot plate analgesiometer was used to induce anxiety. After baseline reading from EPM and LDA, the Wistar rats were exposed to the hot plate and then evaluated for the induction of the anxiety behavior. Results: After exposing to the hot plate, the ratio of time spent in the open arms to the time spent on the closed arms was decreased from 0.027 to 0.010 and also the ratio of time spent on the light chamber to the time spent on the dark chamber was decreased from 0.093 to 0.012. Hot plate method has shown statistical significant induction of anxiety as evaluated by EPM and also LDA. Conclusion: Hot plate method is a good intervention to induce anxiety in Wistar rats. Instead of injecting drugs that causes anxiety to explore the anxiolytic effects of the drugs the hot plate analgesiometer method is a good alternative.
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Anxiety is a major mood disorder, and the high morbidity, co-morbidity and disability of anxiety disorders seriously affect people's quality of life, so the importance and urgency of research on anxiety cannot be overstated. Animal models are the main carriers for studying the mechanism of disease occurrence and development, drug efficacy evaluation and drug development.Unconditioned anxiety model is a common anxiety model.Elevated plus maze test, open field test and light-dark box test are widely accepted paradigms for the detection of unconditioned anxiety.This kind of behavioral paradigm based on environmental exposure takes advantage of the conflict between curiosity and fear of the unfamiliar environment to simulate and detect the anxiety of animals.However, the validity of these behavioral paradigms for evaluating anxiety in animals is questionable.In this paper, we discuss the concept of anxiety, the definition of anxiety behavior in the behavioral test of unconditioned anxiety, and the factors to be considered in the test of unconditioned anxiety behavior.On this basis, new solutions were proposed to the contradictions and blind spots in order to improve the test paradigm of anxiety behavior and provide a more reliable animal model for the evaluation of anxiety.This paper presents a new approach to address the contradictions and blind spots of this paradigm.
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Background: Medicinal plants are part of traditional medicine and should be considered a therapeutic alternative for mental diseases. Several plants belonging to the Verbenaceae family have proved useful in treating general anxiety disorders, the most prevalent psychiatric disorders. Objective: This research aimed to verify the extract's safety, the effect on general behavior, and the effect on sleeping time, as well as to evaluate the anxiolytic-like effect of the methanol extract of Aloysia virgata var. platyphylla (Avp), in mice. Methodology: The toxicity test was done according to the OECD guide (mice groups n=5), and general behavior was observed during the assay. Sleeping time was assessed using the pentobarbital-induced hypnosis method (n=8). Male Swiss albino mice (n=6) were treated with 50 to 400 mg/kg of Avp extract and diazepam as a control. The anxiolytic-like effect was tested through the hole board and elevated plus-maze test. Results: The Avp extract has no side effects in tested doses, and no central nervous system depressant activity was noted. A. virgatavar. platyphyllaincreased exploration (number and time) in the hole board. In the elevated plus-maze, increased number and time into open arms were evidenced compared to the control group. Conclusion: With all these results, we concluded that the Avp extract is safe and has a potential anxiolytic-like activity in the animal model used
Antecedentes: Las plantas medicinales forman parte de la medicina tradicional y deben ser consideradas una alternativa terapéutica para las enfermedades mentales. Varias plantas pertenecientes a la familia Verbenaceae han demostrado su utilidad en el tratamiento de los trastornos de ansiedad, uno de los trastornos psiquiátricos más prevalentes. Objetivo: Esta investigación tuvo como objetivo verificar la seguridad del extracto, el efecto sobre el comportamiento general y el efecto sobre el tiempo de sueño, así como evaluar el efecto tipo ansiolítico del extracto metanólico de Aloysia virgata var. platyphylla(Avp), en ratones. Metodología: La prueba de toxicidad se realizó de acuerdo con la guía de la OCDE (grupos de ratones n=5), y se observó el comportamiento general durante el ensayo. El tiempo de sueño se evaluó mediante el método de hipnosis inducida por pentobarbital (n=8). Se trataron ratones albinos suizos macho (n=6) con 50 a 400 mg/kg de extracto de Avp y diazepam como control. El efecto ansiolítico se probó a través de la placa perforada y prueba del laberinto en cruz elevado. Resultados: El extracto de Avp no tiene efectos secundarios en las dosis probadas y no se observó actividad depresora del sistema nervioso central. A. virgata var. platyphylla aumentó la exploración (número y tiempo) en el tablero de agujeros. En el laberinto en cruz elevado, se evidenció un mayor número y tiempo en los brazos abiertos en comparación con el grupo de control. Conclusión: Con todos estos resultados, concluimos que el extracto de Avp es seguro y tiene una potencial actividad ansiolítica en el modelo animal utilizado
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Animals , Male , Mice , Sleep/drug effects , Anti-Anxiety Agents , Plant Extracts/pharmacology , Verbenaceae/chemistry , Models, AnimalABSTRACT
Background: Anxiety is one of the most prominent psychiatry disorders related to common stress. Approximately two-thirds of anxious patients respond to currently available treatments but the magnitude of problem is still disappointing. Ocimum sanctum (OS), a perennial shrub grown in India, has anti-stress activity. Yet, there is a paucity of data regarding this. Aims and Objectives: This study aims to evaluate the anti-anxiolytic effect of OS leaf extract (OSLE) in Swiss albino mice. Materials and Methods: Elevated plus maze (EPM) and open field test are standardized tests done for screening anxiolytic effects of drugs. The animals were grouped and the tests were conducted and the results were compared with the standard drug diazepam. Results: There was significant increase in the time spent in open arm and number of open arm entries in the diazepam group and group receiving OSLE at dose of 100 mg/kg and 200 mg/kg in EPM test. Furthermore, in the open field test, there was significant increase in the number of square crossed and rearing in the diazepam group and OSLE at dose of 100 mg/kg and 200 mg/kg. Conclusion: OSLE shows significant anxiolytic effect in EPM and open field test models in Swiss albino mice. This can be further studied to open up new possibilities for new drug development for anxiety.
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OBJECTIVES@#To explore the damage effects of chronic restraint stress (CRS) on amygdala cells through the rat CRS model.@*METHODS@#The rat CRS model was established, and the changes in body weight and adrenal mass in control group and CRS group were monitored at 1 d, 7 d, 14 d and 21 d. The behavior changes were evaluated by the percentage of retention time of open arms and open arm entries using the elevated plus maze (EPM). ELISA was used to detect the concentrations of rat's corticotropin releasing hormone (CRH), adrenocorticotropic hormone (ACTH) and cortisol. The changes of expression of glucocorticoid receptor (GR) and glial fibrillary acidic protein (GFAP) in amygdala were determined by immunohistochemistry and Western blotting. Ultrastructure changes of glial cell were observed by transmission electron microscopy. The apoptosis rate of amygdala was measured by flow cytometry.@*RESULTS@#Compared with the control group at the same time points, body weight of CRS 1 d, 7 d, 14 d and 21 d groups increased slowly, but adrenal mass increased significantly; the serum level of CRH, cortisol and ACTH increased significantly at 7 d, 14 d and 21 d respectively; the expression of GR in amygdala was increased while that of GFAP was decreased; EPM test suggested that the percentage of retention time of open arms and open arm entries decreased significantly after 14 d. The CRS group showed different degrees of glial cell damage in amygdala, and the apoptosis rate of glial cell was significantly increased in 21 d group.@*CONCLUSIONS@#This study successfully established a CRS model in rats, and anxiety-like behavioral changes in model rats may be caused by apoptosis of amygdala astrocytes.
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Rats , Animals , Hydrocortisone/pharmacology , Amygdala/metabolism , Adrenocorticotropic Hormone/pharmacology , Apoptosis , Body WeightABSTRACT
Key requirements of successful animal behavior research in the laboratory are robustness, objectivity, and high throughput, which apply to both the recording and analysis of behavior. Many automatic methods of monitoring animal behavior meet these requirements. However, they usually depend on high-performing hardware and sophisticated software, which may be expensive. Here, we describe an automatic infrared behavior-monitor (AIBM) system based on an infrared touchscreen frame. Using this, animal positions can be recorded and used for further behavioral analysis by any PC supporting touch events. This system detects animal behavior in real time and gives closed-loop feedback using relatively low computing resources and simple algorithms. The AIBM system automatically records and analyzes multiple types of animal behavior in a highly efficient, unbiased, and low-cost manner.
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Background: The objective was to study the effect of Aegle marmelos methanolic extracts of leaf (LE) and fruit pulp extract (FE) on learning and memory in albino rats. 40 healthy wistar albino rats of either sex were randomly divided into 10 groups of 4 each (n=4), weighing about 150 to 200 gm were selected for the study. The extracts i.e. 1ml of 1% carboxy methyl cellulose, LE and FE at doses of 100 mg/kg and 200 mg/kg were administered per oral one hour before the experiment.Methods: Learning and memory was assessed by elevated plus maze and Hebb William maze. Latency time and number of entries were assessed by elevated plus maze whereas only latency was assessed by Hebb William maze.Results: Plant extracts of LE and FE at doses 100 mg/kg and 200 mg/kg have shown significant percentage reduction in latency time in elevated plus maze and Hebb William maze (p<0.05) and reduction in the number of entries in elevated plus maze.Conclusions: LE and FE at doses 200 mg/kg have shown significant effect on learning and memory.
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Ashawagandha is herb used for various kinds of disease especially as a nervine tonic. Considering these facts many scientific studies were carried out and its memory, anti-stress activities were studied in detail. Aims and Objectives: To study the Phytochemical analysis and Pharmacological Study of Ashwagandha (Withania somnifera) varieties and Withania somnifera (L.) Dunal wild purified with milk steam (WSWM) root powder. To study the efficacy of Wild and Cultivated varieties of Ashwagandha on rats through Elevated Plus Maze test and Morris Water Maze (MWM) model. Materials and Methods: The formulations Withania somnifera (L.) Dunal wild (WSW) root powder, Withania somnifera (L.) Dunal Nagori (WSN) root powder, Withania somnifera (L.) Dunal wild purified with milk steam (WSWM) root powder, PG (Wheat powder placebo) were subjected to preliminary phytochemical screening for the detection of various chemical constituents present. Animal experimentation was done on Wistar Albino Rats obtained from the animal house attached and are divided into three groups consisting of 6 rats per group. Nootropic agents are effectively screened using this paradigm in scopolamine-induced dementia. Elevated Plus Maze and Morris Water Maze (MWM) model are based on this phenomenon. Results: By performing phytochemical analysis, Withania somnifera (L.) Dunal Nagori (WSN) showed the presence of alkaloids, carbohydrates, glycosides, phytosterols, saponins, proteins and amino acids. Withania somnifera (L.) Dunal wild purified with milk steam (WSWM) showed the presence of alkaloids, carbohydrates, glycosides, proteins and amino acids and wheat powder placebo (PG) showed the presence of alkaloids, carbohydrates, glycosides, saponins, phenolic compounds, tannins, proteins amino acids and flavonoids. Conclusion: The formulation group 3 (WSWM) showed remarkable reduction in the transfer latency time (in elevated plus maze test) from the acquisition day to the retention day and therefore considered Group 3 is statistically significant. The formulation group 3 (WSWM) showed remarkable reduction in the latency scores in Morris water maze and hence Group 3 (Ashwagandha wild purified with milk steam (WSWM) root powder) is statistically significant.
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Background: Cinnamon is one of the best known spices used as an herbal medicine. Cinnamaldehyde (CNM) the volatile oil, which was present in the essential oil of the bark, is the important constituents of cinnamon. Cinnamon has been investigated for its various effects like peptic ulcer protection, antioxidant property, inhibition of tau aggregation, anti-inflammatory activity, effect on cardiovascular system, anti-nociceptive activity, hepato-protective effects, hypolipidemic and antidiabetic activites. The present study was aimed to evaluate the anxiolytic effect of CNM per se and its interaction with diazepam in swiss albino mice.Methods: Anxiolytic activity was evaluated by elevated plus maze method. A group of 36 healthy mice of either sex weighing 20-30 grams were divided at random into six groups (n=6). CNM and diazepam were dissolved in tween twenty 20% to maintain uniformity of the solvent and given orally. Group I was given twenty 20% (10 ml/kg, p.o.), group II diazepam (0.5 mg/kg, p.o.), group III diazepam (1 mg/kg, p.o.), group IV cinnamaldehyde (100 mg/kg, p.o.), group V cinnamaldehyde (200 mg/kg, p.o.), group VI cinnamaldehyde and diazepam (100 mg/kg and 0.5 mg/kg, p.o.).Results: Cinnamaldehyde per se showed no anxiolytic effect at any dose (p<0.05). The standard drug diazepam has shown significant anxiolytic activity on elevated plus maze. Whereas combination of diazepam 0.5 mg/kg and cinnamaldehyde 100 mg/kg showed significant increase in the time spent in open arms as compared to all groups (p<0.05).Conclusions: CNM per se did not show any effect on anxiety but enhanced the action of diazepam when co-administered.
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Background: Anxiety is a state characterized by somatic, emotional, cognitive, and behavioral components, associated with significant disability. The pharmacotherapy for anxiety remains limited for achievable safety and tolerability of the medicines. Benzodiazepines use associated with side effects like psychomotor impairment and addiction liability. Due to the ADRs associated with antianxiety drugs, the drug trials have focused on screening herbal medicines that are reportedly used in the treatment of anxiety and which have minimal side effects.Methods: The anxiolytic activity was examined by using the elevated plus maze (EPM) and open field test (OFT), forty Albino wistar strain rats of both sex of weighing 120 to 200 g were divided into four groups of ten rats each.. Group 1 received vehicle (normal saline); group 2 received diazepam (1 mg/kg); groups 3 and 4 received BacoMind�, 30 and 60 mg/kg oral, respectively.Results: Rats treated with diazepam (1 mg/kg, p.o.) showed significant (p<0.001) increase in the percentage of open arms entries and time spent whereas, in closed arm the number of entries and time spent were significantly (p<0.05) decreased. Intraperitonial administration of BacoMind� extract of plant Bacopa monnieri Linn. exhibited significant (p<0.05) increase in the number of open arm entries and time spent with significant (p<0.05) reduction in number of entries and time spent in the closed arm as compared to group 1. BacoMind� treated rats also produced significant increase in the number of rearings (p<0.05), assisted rearings and number of squares crossed (p<0.01).Conclusions: BacoMind� extract of plant Bacopa monnieri Linn possess significant anxiolytic activity in the rats. It can be a promising anxiolytic agent.
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Background:Mustard honey, a monofloral honey derived from mustard flower is considered a great source of nutritional and medicinal values. The honey is traditionally used as ethnomedicinein different parts of the world to cure many health problems. The present study aimed to evaluate its sedative-anxiolytic potential by integrating three conventional methods in a sequential order. Methods:Open field, hole cross and elevated plus maze experiments were performed in a row with a single oral administration of honey to the Swiss Albino mice. Behavioral parameters like square crossing, rearing, grooming, hole crossing and entry/duration in open arm were observed for each animal in different time intervals.Results:The findings were compared to that of a standard drug, diazepam (1mg/kg). Mustard honey at higher doses showed sedative activity (4g/kg and6g/kg) whereas with low doses (2g/kg) exhibited anxiolytic potential. The physicochemical properties of honey were also screened in this study.Conclusions:The integrated method proved to be an effective approach for assessment of neuropharmacologicalpotential for crude or standard medicine. However, further analysis was recommended to investigate active compound which may lead to a new drug development
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Background: Anxiety involved panic attacks either having or not having social fear, social anxiety disorder, generalized anxiety disorder as well as separation anxiety disorder is known to be marked mental diseases. It is related to high medical cost and a significant load of disease. Agaricus blazei Murill (AbM) is a mushroom and possesses immunemodulating and antimicrobial effects both in-vivo and in-vitro and as well as it has been used to treat cancer, hepatitis, dermatitis, and hyperlipidemia traditionally. Method: In this experiment evaluation of anxiolytic effect of AbM on mice has been done by using Elevated Plus Maze test, open field test and motor co-ordination test by rotarod. Mice (Mus musculus) weighing 22-25 grams, were divided into 4 groups (n=6). Oral administration of hydro-alcoholic extract of AbM was utilized in 2 doses i.e. 136.5 mg/kg and 273 mg/kg. Group, I received vehicle (distilled water 10 ml/kg), p.o. Group II received standard (diazepam 1 mg/kg), i.p. Group III and IV orally received hydro-alcoholic extract of AbM (136.5 mg/kg and 273 mg/kg, respectively). Result: In Elevated Plus Maze test, oral administration of hydro-alcoholic extract of AbM (136.5 mg/kg and 273 mg/kg, respectively) exhibited significant (p<0.01) elevation in the percentage of number of open arm entries (48.0 ± 1.1% and 48.93 ± 2.1% respectively) and time spent in open arm (14.92 ± 1.9% and 84.17 ± 2.4%). Conclusion: Hence it is concluded that hydro-alcoholic extract of AbM can be a new therapeutic agent to treat anxiety.
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Taurine has a number of beneficial pharmacological actions in the brain such as anxiolytic and neuroprotective actions. We explored to test whether taurine could be transported to the central nervous system through the intranasal route. Following intranasal administration of taurine in mice, elevated plus maze test, activity cage test and rota rod test were carried out to verify taurine’s effect on anxiety. For the characterization of potential mechanism of taurine’s anti-anxiety action, mouse convulsion tests with strychnine, picrotoxin, yohimbine, and isoniazid were employed. A significant increase in the time spent in the open arms was observed when taurine was administered through the nasal route in the elevated plus maze test. In addition, vertical and horizontal activities of mice treated with taurine via intranasal route were considerably diminished. These results support the hypothesis that taurine can be transported to the brain through intranasal route, thereby inducing anti-anxiety activity. Taurine’s anti-anxiety action may be mediated by the strychnine-sensitive glycine receptor as evidenced by the inhibition of strychnine-induced convulsion.
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Animals , Mice , Administration, Intranasal , Anxiety , Arm , Brain , Central Nervous System , Isoniazid , Picrotoxin , Receptors, Glycine , Seizures , Strychnine , Taurine , YohimbineABSTRACT
Abstract Tropaeolum majus L., Tropaeolaceae, popularly known in Brazil as 'capuchinha' is widely used due its anti-inflammatory, antiseptic, anti-hypertensive and anti-depressive properties. However, scientific investigations about its effects on the central nervous system are still scarce. This study investigated the central pharmacological actions of the prolonged treatment with a hydroethanolic extract of T. majus in male Wistar rats in the elevated plus maze and hole-board behavioral models. For this, rats were daily treated with distillated water (negative control); diazepam (1 mg/kg) or hydroethanolic extract of T. majus (75, 150 and 300 mg/kg), for 29 days (by gavage) and were submitted to elevated plus maze and hole-board. Animals treated with all hydroethanolic extract of T. majus or diazepam doses increased the percentage of entries in open arms when compared to control group. However, only treatment with diazepam increased the length of time spent in the open arms of the elevated plus maze. No differences between all groups were observed regardless rearing, grooming, stretched-attend postures and defecation rates. In the HB test, in opposite to diazepam, treatment with hydroethanolic extract of T. majus did not interfere in the exploratory activity of rats. The hydroethanolic extract of T. majus promotes anxiolytic-like effects when orally administered in rats.
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Background: Anxiety has become a very important area of research interest in psychopharmacology as it affects one-eighth of the population worldwide. Benzodiazepines are still the most commonly used drugs for anxiety despite a number of side effects.There is a need for newer antianxiety drugs with increased safety and efficacy, hence this study was undertaken to evaluate the anxiolytic activity of Nerium oleander flowers.Methods: Aqueous extract of Nerium oleander flowers (NA) was prepared using soxhalet apparatus. A total of 24 Albino rats aged 8-10 weeks of either sex weighing about 100-150g were obtained and divided into 4 groups of 6 rats each. Group I: Normal saline 10mL/kg. Group II: Diazepam 2mg/kg Group III: NA at a dose of 200 mg/kg Group IV: NA at a dose of 400mg/kg. The anxiolytic activity of Aqueous extract of NA was tested by elevated plus maze and digital actophotometer models. Data was analysed using one way ANOVA followed by Posthoc Tukey’s test.Results: In EPM model, the NA at 200, 400mg/kg doses showed that the number of entries and time spent in the open arms were increased significantly as compared to the control animals. (p<0.001). In Actophoptometer model, two different doses of NA (200 and 400mg/kg) showed a dose-dependent decrease in the locomotor activity, when compared to the control animals (p<0.001).Conclusions: Both the doses of aqueous extract of Nerium oleander flowers (200mg and 400mg/kg) possess anxiolytic activity and could be used as a new approach to treat anxiety.
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Background: Anxiety disorders are the most prevalent class of psychiatric condition. Medications commonly given for treatment can elicit several central nervous system (CNS) side-effects that patients find difficult to tolerate. So there is a need for new pharmacotherapeutic approaches to treat anxiety with greater efficacy and fewer side effects. Hence this study has been taken up to evaluate the anxiolytic effect of furosemide at three different doses (75mg/kg, 150mg/kg and 200mg/kg) in Albino rats.Methods: After obtaining approval from the institutional animal ethical committee 30 Albino rats weighing about 150-200gm were taken and divided into 5 groups of 6 rats each. Group 1: Normal Saline 10ml/kg (control); Group 2: Diazepam 2mg/kg (standard); Group 3: Furosemide 150mg/kg (test group 1); Group 4: Furosemide 200mg/kg (test group 2); Group 5: Furosemide 75mg/kg + Diazepam 1mg/kg (sub threshold dose). The anxiolytic activity of furosemide was tested by elevated plus maze and digital actophotometer models. Data was analysed using one way ANOVA followed by Posthoc Tukey’s test.Results: Furosemide (150mg/kg and 200mg/kg) have shown significant increase in open arm entries (p<0.05) and time spent in open arm (p<0.05) compared to control. Also furosemide (150mg/kg and 200mg/kg) have shown statistically significant decrease in locomotor activity (p<0.05) compared to control in actophotometer model. Potentiation of time spent and number of entries in open arm and decrease in locomotor activity were noticed when sub threshold doses of combination of diazepam and furosemide were used.Conclusions: These results suggest that furosemide possesses significant anxiolytic activity at both the doses. Furosemide given in sub threshold dose potentiates the antianxiety effect of sub threshold dose of diazepam when used in combination. Hence, after further studies, furosemide can be used as an anxiolytic drug.
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Objective:To observe the influence of Naogongtai formula on hippocampus monoamine neurotransmitters and their metabolites in rats in elevated plus-maze test, and explore the mechanism of antihypertensive effect of brain tegument peptide. Methods:The effects of two doses of Naogongtai formula on the anxiety behavior of rats were observed by using the rat model of elevated malaria anxiety (EPM). The contents of monoamine neurotransmitters and their metabolites in hippocampus of rats were determined by HPLC-FLD. Results:Compared with those in the blank control group,the percents of open arms time and entries in the high dosage of Naogongtai formula group significantly increased (P < 0.05),and the percent of open arms entries in the low dosage of Naogongtai formula group significantly increased (P < 0.05). Compared with that in the blank control group, the content of 5-HT in the high dosage of Naogongtai formula group significantly decreased (P < 0.05) and the content of HVA significantly increased (P < 0.05). Conclusion:In the EPM test, Naogongtai formula shows a certain anti-anxiety effect, and the determination of monoamine neurotransmitters in hippocampus of rats may be related to the reduction of rat hippocampal 5-HT content.
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Aim To explore the correlation between elevated plus maze (EPM) and elevated zero maze (EZM),as two type animal models of state anxiety in Kunming mice. Methods The behavior of adult,♂/♀,Kunming mice in EPM and EZM was recorded by sequence,for 5 min,with a one-week inter-trial interval. The following parameters were evaluated:percentage of time in open arms (Otime%) and total entries into open and closed arms(Entries). Subsequently,descriptive analysis,fac-tor analysis,cluster analysis,correlation analysis and consisten-cy test were calculated for these parameters. Results T test showed that, compared with EPM, Otime% of EZM (male/fe-male/both sex) decreased, while Entries (male/both sex) in-creased significantly;Fiedman test showed that Otime% (male/female/both sex) and Entries(female/both sex) of both EPM and EZM had great difference between the 5 repeated fragments;Wilcoxon test showed that, compared with EPM, Otime% of EZM in 1st min (male/female/both sex), 2nd min (male/fe-male/both sex),3rd min (female/both sex) decreased, while the Entries in 1st min (male/both sex), 4th min (male/fe-male/both sex),5th min(both sex) increased markedly. Clus-ter analysis showed that EPM and EZM parameters could be clustered into two groups:EPM group and EZM group(male/fe-male/both sex). Factor analysis indicated that the EPM and EZM parameters could be extracted as two factors: EPM factor and EZM factor (male/female/both sex). Correlation analysis displayed either general(in Otime%) or poor(in Entries) cor-relation(male/female/both sex) between EPM and EZM param-eters. Consistency test displayed general consistency (male/fe-male/both sex) in Otime% between EPM and EZM. Conclu-sions Despite of the similar internal principles to induce state anxiety,the different external environment(structure) results in different behavioral patterns,different structure dimensions,fair correlation and concordance between EPM and EZM, and the stable index of EPM and EZM might be preferred to Otime%.
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Objective To explore the expression of acid-sensing ion channel 1a ( ASIC1a) in cen-tral nervous system of mice with panic like behavior. Methods 20 male C57BL/6 mice were randomly di-vided into two groups according to their weight( 10 mice in each group):the group experienced rat exposure test of panic-like behavior model ( RET group ) and the control group ( Ctr group ) . A panic-like behavior model was established by rat exposure stimuli. Ten minutes defensive and avoidance behaviors of mice were recorded with a horizontal video camera. The anxiety level of mice was evaluated by elevated plus maze ( EPM) test.Western blot was used to detect the ASIC 1a expression in different brain areas of prefrontal cor-tex,hippocampus and periaqueductal gray (PAG). Results Compared with Ctr group,mice in RET group spent significantly more time in freezing ((5.83±1.92)s) than that of Ctr group ((1.00±0.45)s) (P<0.01),had significantly higher frequency of risk assessment behavior (5.33±0.49) than that of Ctr group (0.60±0.40) (P<0.01),spent significantly less time to contact the wire mesh ((17.83±4.38)s) than that of Ctr group((50.00±6.90)s) (P<0.01),and significantly more time of staying in the protected area((431.00±33.13)s) than that of Ctr group((264.40±40.43)s) (P<0.01).At the same time,RET group showed sig-nificantly lower time percent ((8.28±1.12)％) than Ctr group ((16.81±2.13)％) in opened arm (P<0.05) and significantly higher time percent ((80.08±4.26)％) than Ctr group ((60.91±5.27)％) in the closed arm (P<0.05).Western blot suggested that the expression level of ASIC 1a in the prefrontal cortex (1.32± 0.05) and hippocampus (2.56±0.30) significantly increased than that of Ctr group((0.98±0.07),(1.56± 0.16)( P<0.05),while significantly decreased in the PAG (0.83± 0.02) than that of Ctr group(1.26±0.05) ( P<0.05) . Conclusion Rat exposure stimuli can induce panic-like behavior among mice,which increases the expression of ASIC 1a in the prefrontal cortex and hippocampus,but decreases the level of ASIC 1a in the PAG.
ABSTRACT
The effect of cocoa powder and subchronic exposure to classical music in Wistar rats behavior on anxiety evaluation tests and their antioxidant activity was evaluated. The animals were divided into four groups: control group (CG), cocoa powder group (CPG), music group (MG) and cocoa powder with music group (CPMG). During 15 days, CPG and CPMG received commercial non-alkalized cocoa powder daily (66 mg total polyphenols / g of product, by oral gavage), while MG and CPMG were exposed to the music of Mozart (Serenade N.10 in B flat major for woodwinds and bass, "Gran partita" K.361 / 370a, Largo movement, 8:35 minutes long). At the end of the experiment, the animals were submitted to elevated plus-maze (EPM) and openfield (OF) tests, and serum analysis of thiobarbituric acid reactive substances index (TBA-RS) and the activity of antioxidant enzymes catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). Animals from MG and CPMG groups showed the highest total horizontal locomotion and more time spent at the central area and reduced immobility time at the OF. The TBA-RS average of the treated groups were lower than the GC. The average activity of CAT was higher in CPMG than the others, and the average activity of SOD and GSH-Px were higher only in CPG and CPMG. We concluded that the treatment with this classical music showed mild anxiolytic activity. Both treatments (cocoa and music) improved serum antioxidant status, but the peripheral activity of different serum enzymes was mainly improved by the cocoa powder(AU)
Se evaluó el efecto de cacao en polvo y la exposición subcrónica a la música clásica sobre el comportamiento de ratas Wistar en pruebas de evaluación de la ansiedad y su actividad antioxidante. Los animales fueron divididos en cuatro grupos: control (GC), cacao en polvo (GCP), música (GM) y cacao en polvo con música (GCPM). Durante 15 días, GCP y GCPM recibieron cacao en polvo comercial no alcalinizado diariamente (66 mg de polifenoles totales / g de producto, mediante una sonda nasogástrica), mientras que GM y GCPM fueron expuestos a la música de Mozart (Serenata N.10 em Si bemol mayor, "Gran Partita" K.361 / 370a, movimiento Largo, 8:35 minutos de duración). Al final del experimento, los animales fueron sometidos a las pruebas de laberinto en cruz elevado (LCE) y de campo abierto (CA), y el análisis sérica del índice de sustancias reactivas al ácido tiobarbitúrico (TBA-RS) y la actividad de las enzimas antioxidantes catalasa (CAT), superóxido dismutasa (SOD) y glutatión peroxidasa (GSH-Px). Los animales GM y GCPM mostraron la mayor locomoción horizontal, más tiempo en la zona central y un tiempo reducido de inmovilidad en el CA. El TBA-RS promedio de los grupos tratados fue más bajo que el control. La actividad media de CAT fue mayor para GCPM que los otros, y la actividad media de la SOD y GSH-Px fueron mayores sólo en GCP y GCPM. Concluimos que el tratamiento con esta música clásica mostró modesta actividad ansiolítica. Ambos tratamientos (cacao y música) mejoraron el estado antioxidante en suero, pero la actividad periférica de diferentes enzimas fue mejorada principalmente por acción del cacao(AU)