Absence of sibutramine effect on spontaneous anxiety in rats

INTRODUSTION: Sibutramine has been described as a drug recommended for treatment of obesity, since it has the ability to inhibit the reuptake of serotonin and noradrenaline in the central nervous system, thereby increasing energy expenditure. OBJECTIVE: Investigate the anxiogenic and anxiolytic effects of acute and chronic treatment with sibutramine in rats submitted to the task of the elevated plus-maze. METHODS: Diazepam was used as a positive control for the anxiolytic effect, and the task of the elevated plus-maze showed sensitivity to detect the effect. In the chronic treatment, sibutramine was ingested for a period of two months. RESULTS: The acute and chronic treatments at the studied dose, which is described to produce a maximum effect of anti-obesity in rats, did not interfere with anxiety. CONCLUSIONS: The acute and chronic administration of sibutramine is not related to anxiolytic or anxiogenic effects.

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Mikania glomerata: Phytochemical, Pharmacological, and Neurochemical Study

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2014/710410 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 6

Author(s):

Lorena C. L. R. Santana ◽

Maria R. M. Brito ◽

George L. S. Oliveira ◽

Antônia M. G. L. Citó ◽

Clayton Q. Alves ◽

...

Keyword(s):

Elevated Plus Maze ◽

Methyl Esters ◽

Anxiolytic Effect ◽

Ethanol Extract ◽

Positive Control ◽

Octadecanoic Acid ◽

Methyl Cinnamate ◽

Adult Mice ◽

Plus Maze ◽

Gaba Antagonist

The present study primarily aims to identify the relative density and the fatty acids (methyl esters) content present in the standardized ethanol extract of leaves ofM. glomerata(EPMG). Meanwhile, in a second moment, this study evaluated the effects of the EPMG on the levels of amino acids in the hippocampus, and the mechanism of sedative and anxiolytic action. Adult mice were treated with doses of 200, 300, and 400 mg/kg and evaluated in open field, elevated plus-maze, light dark, and rotarod tests. Moreover, in the behavioral tests diazepam (GABAergic anxiolytic, 2 mg/kg) as positive control and flumazenil (GABA antagonist, 2.5 mg/kg) were used to identify mechanism of sedative and anxiolytic action produced by EPMG. The EPMG is constituted by the following compounds: methyl cinnamate, 2H-1-benzopyran-2-one, (2-hydroxyphenyl)methyl propionate, (Z)-methyl-hexadec-7-enoate, methyl hexadecanoate, hexadecanoic acid, (Z)-methyl-octadec-9-enoate, octadecanoic acid, and squalene. This extract demonstrated anxiolytic effects, which may be mediated by GABAergic system, and was able to increase GABA levels and reduce of glutamate and aspartate concentrations in mice hippocampus, which can directly and/or indirectly assist in their anxiolytic effect. Although more studies are needed, the EPMG could represent an interesting therapeutical strategy in the treatment of anxiety.

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Effects of Acute and Chronic Treatment of Novel Psychotropic Drug, 8- (Trifluoromethyl)-1, 2, 3, 4, 5-benzopentathiepin-6-amine Hydrochloride (TC-2153), on the Behavior of Zebrafish (Danio Rerio): A Comparison with Fluoxetine

Letters in Drug Design & Discovery ◽

10.2174/1570180816666190221162952 ◽

2019 ◽

Vol 16 (12) ◽

pp. 1321-1328

Author(s):

Alexander Kulikov ◽

Nadezhda Sinyakova ◽

Elizabeth Kulikova ◽

Tatyana Khomenko ◽

Nariman Salakhutdinov ◽

...

Keyword(s):

Danio Rerio ◽

Chronic Treatment ◽

Tyrosine Phosphatase ◽

Anxiolytic Effect ◽

Chronic Administration ◽

Positive Control ◽

Amine Hydrochloride ◽

Suitable Model ◽

L 14 ◽

New Generation

Background: Striatal-enriched Tyrosine Phosphatase (STEP) plays a key role in the mechanisms of neuronal signaling and is a potential molecular target for new generation of psychotropic drugs. STEP inhibitor, 8-(trifluoromethyl-1,2,3,4,5-benzopentathiepin-6-amine hydrochloride (TC-2153), shows anxiolytic effect on mice. Zebrafish (Danio rerio) is a suitable model for the study of anxiety pharmacology. Objective: The objective of this study is to investigate the effects of acute and chronic TC-2153 treatment on zebrafish anxiety-related behavior. Methods: The effects of acute (0.125 and 0.25 mg/l, 3 h) and chronic (0.125 mg/l, 14 days) administration of TC-2153 on locomotion and anxiety-related behavior (time spent near the bottom and mean distance from the bottom) of adult zebrafish in the Novel Tank (NT) test were compared with those of the same doses of fluoxetine chosen as a positive control. Results: Acute treatment with 0.125 mg/l and 0.25 mg/l of TC-2153 or fluoxetine decreased time spent near the bottom, increased time spent near the surface and increased mean distance from the bottom of tank. Chronic treatment with 0.125 mg/l of TC-2153 reduced only time spent near the tank bottom without any effect on time spent near the surface and mean distance from the bottom, while chronic administration of 0.125 mg/l of fluoxetine altered these three indices of anxiety. Conclusion: Both acute and chronic TC-2153 produces anxiety-like effect indicating STEP involved in the mechanism of anxiety-related behavior in zebrafish. At the same time, chronic treatment with TC-2153 reduced locomotor activity. Zebrafish is a promising laboratory object to study the role of STEP in the nervous system.

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Neuropharmacological Characterization of Dioclea altissima Seed Lectin (DAL) in Mice: Evidence of Anxiolytic-like Effect Mediated by Serotonergic, GABAergic Receptors and NO Pathway

Current Pharmaceutical Design ◽

10.2174/1381612826666200331093207 ◽

2020 ◽

Vol 26 (31) ◽

pp. 3895-3904

Author(s):

João R.C. Araújo ◽

Adriana R. Campos ◽

Marina de Barros M.V. Damasceno ◽

Sacha A.A.R. Santos ◽

Maria K.A. Ferreira ◽

...

Keyword(s):

Structural Integrity ◽

Elevated Plus Maze ◽

Biological Activities ◽

Plant Lectins ◽

Plus Maze ◽

Marble Burying ◽

Gabaergic Receptors ◽

The Central Nervous System ◽

Hole Board

Background: Plant lectins have shown promising biological activities in the central nervous system (CNS). Objective: This study evaluated the effect of DAL, a lectin isolated from the seeds of the Dioclea altissima species, having binding affinity to D-glucose or D-mannose residues, on mice behavior. Methods: Mice (n=6/group) were treated (i.p.) with DAL (0.25, 0.5 or 1 mg/kg) or vehicle and subjected to several tests (open field/OFT, marble-burying/MBT, hole-board/HBT, elevated plus maze/PMT, tail suspension/ TST, forced swimming/FST or rotarod/RRT). Pizotifen, cyproheptadine, flumazenil, L-NAME, 7-NI, Larginine or yohimbine were administered 15 min before DAL (0.5 mg/kg) and the animals were evaluated on PMT. It was also verified whether the DAL effect depended on its structural integrity and ability to interact with carbohydrates. Results: The results showed there were no neurobehavioral changes in the mice at the RRT, FST and locomotion in the OFT. DAL (0.25, 0.5 or 1 mg/kg) increased the behavior of grooming and rearing in the OFT, head dips in the HBT, pedalling in the TST and decreased the number of marbles hidden in the MBT. In the PMT, DAL (0.25, 0.5 and 1 mg/kg) and Diazepam increased the frequency of entries in the open arms and the time of permanence in the open arms without affecting the locomotor activity. The effect of DAL was dependent on carbohydrate interaction and protein structure integrity and it prevented by pizotifen, cyproheptadine, flumazenil, L-NAME and 7-NI, but not by L-arginine or yohimbine. Conclusion: DAL was found to have an anxiolytic-like effect mediated by the 5-HT and GABAergic receptors and NO pathway.

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Effects of Simultaneous Reinforcement of Endocannabinoid and Cholinergic Systems on Anxiety-Like Behavior in Mice

10.21203/rs.3.rs-422248/v1 ◽

2021 ◽

Author(s):

Siamak Shahidi ◽

Asghar Dindar ◽

Alireza Komaki ◽

Reihaneh Sadeghian

Keyword(s):

Elevated Plus Maze ◽

Enzyme Inhibitor ◽

Endocannabinoid System ◽

Anxiolytic Effect ◽

Control Group ◽

Concurrent Administration ◽

Elevated Plus Maze Test ◽

Cholinergic Systems ◽

Plus Maze ◽

High Doses

Abstract ObjectiveAnxiety behavior is regulated by different neurotransmitter systems. There has been no direct relationship between endocannabinoid and cholinergic systems on anxiety in previous studies. This study investigated the effects of each of these systems separately and simultaneously using Donepezil (Cholinesterase inhibitor) and URB-597 (endocannabinoid degrading enzyme inhibitor) on anxiety-like behavior. MethodEighty-eight male mice were divided into eleven groups (n=8) including control (saline), diazepam (0.3 mg /kg), URB-597 (0.1, 0.3, or 1 mg /kg), donepezil (0.5, 1 or 2 mg/kg) and the combination of the two drugs at low, medium and high doses. All treatments were injected intraperitoneally 30 minutes before the elevated plus maze test. ResultsSeparate administration of URB597, donepezil or diazepam increased the number and time spent of open arms compared to the control group. Concurrent administration of URB and donepezil at low, medium and high doses did not change the number of open arms entries compared to the control group, but they reduced the number of entries to the closed arms. ConclusionsThese results suggest that strengthening any cholinergic or endocannabinoid system has anxiolytic effect similar to diazepam. However, the interaction of these two systems has fewer anxiolytic effects compared to the effects of each alone. It seems that these drugs alone may represent a strategy for the treatment of anxiety disorders.

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Chemical Composition of Essential Oil from Flower of ‘Shanzhizi’ (Gardenia jasminoides Ellis) and Involvement of Serotonergic System in Its Anxiolytic Effect

Molecules ◽

10.3390/molecules25204702 ◽

2020 ◽

Vol 25 (20) ◽

pp. 4702

Author(s):

Nan Zhang ◽

Mu Luo ◽

Lei He ◽

Lei Yao

Keyword(s):

Essential Oil ◽

Elevated Plus Maze ◽

Anxiolytic Effect ◽

Serotonergic System ◽

Control Treatment ◽

Monoamine Neurotransmitters ◽

Neurotransmitter Receptor ◽

Gardenia Jasminoides ◽

Plus Maze ◽

Gardenia Jasminoides Ellis

Gardenia jasminoides Ellis is a famous fragrant flower in China. Previous pharmacological research mainly focuses on its fruit. In this study, the essential oil of the flower of ‘Shanzhizi’, which was a major variety for traditional Chinese medicine use, was extracted by hydro distillation and analyzed by GC-MS. Mouse anxiety models included open field, elevated plus maze (EPM), and light and dark box (LDB), which were used to evaluate its anxiolytic effect via inhalation. The involvement of monoamine system was studied by pretreatment with neurotransmitter receptor antagonists WAY100635, flumazenil and sulpiride. The monoamine neurotransmitters contents in the prefrontal cortex (PFC) and hippocampus after aroma inhalation were also analyzed. The results showed that inhalation of G. jasminoides essential oil could significantly elevated the time and entries into open arms in EPM tests and the time explored in the light chamber in LDB tests with no sedative effect. WAY100635 and sulpiride, but not flumazenil, blocked its anxiolytic effect. Inhalation of G. jasminoides essential oil significantly down-regulated the 5-HIAA/5-HT in the PFC and reduced the 5-HIAA content in hippocampus compared to the control treatment. In conclusion, inhalation of gardenia essential oil showed an anxiolytic effect in mice. Monoamine, especially the serotonergic system, was involved in its anxiolytic effect.

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Effects of single and combined gabapentin use in elevated plus maze and forced swimming tests

Acta Neuropsychiatrica ◽

10.1017/neu.2014.17 ◽

2014 ◽

Vol 26 (5) ◽

pp. 307-314 ◽

Cited By ~ 4

Author(s):

Fatma Sultan Kilic ◽

Sule Ismailoglu ◽

Bilgin Kaygisiz ◽

Setenay Oner

Keyword(s):

Elevated Plus Maze ◽

Anxiolytic Effect ◽

Experimental Models ◽

Forced Swimming ◽

Anxiety And Depression ◽

Antidepressant Effect ◽

Control Group ◽

Psychiatric Illnesses ◽

Plus Maze ◽

Antidepressant Effects

BackgroundGabapentin, a third-generation antiepileptic drug, is a structural analogue of γ-aminobutyric acid, which is an important mediator of central nervous system. There is clinical data indicating its effectiveness in the treatment of psychiatric illnesses such as bipolar disorder and anxiety disorders.ObjectivesWe aimed to investigate the antidepressant and anxiolytic-like effects and mechanisms of gabapentin in rats.Material and MethodsFemale Spraque–Dawley rats weighing 250±20 g were used. A total of 13 groups were formed, each containing 8 rats: gabapentin (5, 10, 20, 40 mg/kg), amitriptyline (10 mg/kg), sertraline (5 mg/kg), diazepam (5 mg/kg), ketamine (10 mg/kg), gabapentin 20 mg/kg was also combined with amitriptyline (10 mg/kg), sertraline (5 mg/kg), diazepam (5 mg/kg) and ketamine (10 mg/kg). All the drugs were used intraperitoneally as single dose. Saline was administered to the control group. Elevated plus maze and forced swimming tests were used as experimental models of anxiety and depression, respectively.ResultsIt was observed that gabapentin showed an anxiolytic-like and antidepressant-like effect in all doses in rats. Its antidepressant effect was found to be the same as the antidepressant effects of amitriptyline and sertraline. There was no change in the antidepressant effect when gabapentin was combined with amitriptyline and ketamine, but there was an increase when combined with sertraline and diazepam. Gabapentin and amitriptyline showed similar anxiolytic effect, whereas ketamine and diazepam had more potent anxiolytic effect compared with them.ConclusionsThese data suggest that gabapentin may possess antidepressant- and anxiolytic-like effects.

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