Angiotensin-(1–7) central administration induces anxiolytic-like effects in elevated plus maze and decreased oxidative stress in the amygdala

2013 ◽  
Vol 145 (2) ◽  
pp. 165-171 ◽  
Author(s):  
Walther Bild ◽  
Alin Ciobica
Keyword(s):  
Oxidative Stress ◽  
Elevated Plus Maze ◽  
Central Administration ◽  
Plus Maze

scholarly journals Inhibition of Central Angiotensin Converting Enzyme Exerts Anxiolytic Effects by Decreasing Brain Oxidative Stress

2011 ◽  
Vol 30 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Alin Ciobica ◽  
Lucian Hritcu ◽  
Veronica Nastasa ◽  
Manuela Padurariu ◽  
Walther Bild
Keyword(s):  
Oxidative Stress ◽  
Angiotensin Ii ◽  
Angiotensin Converting Enzyme ◽  
Elevated Plus Maze ◽  
Enzyme Inhibitor ◽  
Lipid Peroxidation Product ◽  
Converting Enzyme ◽  
Plus Maze ◽  
Antioxidant Defense Enzymes ◽  
Brain Oxidative Stress

Inhibition of Central Angiotensin Converting Enzyme Exerts Anxiolytic Effects by Decreasing Brain Oxidative StressThis study investigated the effects of angiotensin II and captopril intracerebroventricular administration on anxiety status and brain oxidative stress. Elevated plus maze was used in order to asses the anxiety-like behavior, while the biochemical analysis included the determination of some antioxidant defense enzymes like superoxide dismutase and glutathione peroxidase and also a lipid peroxidation product (malondialdehyde). Our results provide additional evidence of angiotensin II induced anxiety-like effects and increased prooxidant status. Moreover, the blockade of angiotensin II, by the administration of an angiotensin converting enzyme inhibitor (captopril) resulted in anxiolytic effects and decreased oxidative stress status. In addition, we found a significant correlation between the time spent by rats in the open arms of the elevated plus maze and oxidative stress markers. This could raise important therapeutic issues regarding the anxiolytic effects of some angiotensin converting enzyme inhibitors used primarily for hypertension, such as captopril. Also, it seems that oxidative stress could play an important part in these actions.

Effects of angiotensin II receptor antagonists on anxiety and some oxidative stress markers in rat

Open Medicine ◽  
2011 ◽  
Vol 6 (3) ◽  
pp. 331-340 ◽  
Author(s):  
Alin Ciobica ◽  
Veronica Bild ◽  
Lucian Hritcu ◽  
Manuela Padurariu ◽  
Walther Bild
Keyword(s):  
Oxidative Stress ◽  
Angiotensin Ii ◽  
Elevated Plus Maze ◽  
Angiotensin Ii Receptor Blockers ◽  
Oxidative Stress Markers ◽  
Angiotensin Ii Receptor ◽  
Stress Markers ◽  
Plus Maze ◽  
Receptor Blockers ◽  
And Oxidative Stress

AbstractIn addition to its known classical roles, the renin angiotensin system (RAS) has more subtle functions which include the regulation of emotional responses. Previous studies regarding the anxiety related behavior of RAS have showed controversial results. There is also evidence that oxidative stress accompanies angiotensin II infusion, but the role of AT1/AT2 specific receptors is not clear. The aim of this study was to evaluate the effects of central angiotensin II receptor blockers on anxiety state and oxidative stress. Behavioral testing included elevated plus maze, while oxidative stress status was measured though the extent of a lipid peroxidation product (malondialdehyde-MDA) and the specific activity of some defense antioxidant enzymes (superoxide dismutase-SOD and glutathione peroxidase-GPx). The rats treated with angiotensin II spent significantly less time in the open-arms of elevated-plus-maze, while the administration of losartan resulted in a significant increase of this time. We observed a significant increase of MDA concentration in the angiotensin II group and a decrease of MDA levels in both losartan and PD-123177 groups. In addition, a significant correlation was seen between the time spent in the open arms and oxidative stress markers. These findings could lead to important therapeutic aspects regarding the use of angiotensin II receptor blockers in anxiety-related disorders.

scholarly journals Hypericum perforatum (ethanolic extract) ameliorates simulated hypobaric hypoxia induced oxidative stress and neuronal damage in brains of Balb/c mice

2018 ◽  
Vol 9 (2) ◽  
pp. 1-8
Author(s):  
Amardeep Gautam ◽  
Rizwana Tabassum ◽  
Anju Katyal
Keyword(s):  
Oxidative Stress ◽  
High Altitude ◽  
Passive Avoidance ◽  
Hypobaric Hypoxia ◽  
Hypericum Perforatum ◽  
Elevated Plus Maze ◽  
Ethanolic Extract ◽  
Amnesic Effect ◽  
Plus Maze ◽  
High Altitude Illness

Background: Hypobaric hypoxia refers to lower oxygen availability at high altitudes and is the cause of high altitude illness. Drugs such as acetazolamide and dexamethasone provide symptomatic relief and are associated with undesired side effects. Plant extracts such as Hypericum perforatum, which are documented to have neuromodulatory role can be more beneficial in ameliorating high altitude illness. Aims and Objective: Progressive cognitive decline is the hallmark characteristic of hypobaric hypoxia induced neuropathology attributed to ensuing oxidative stress and subsequent hippocampal damage. We have explored the efficacy of ethanolic extracts of Hypericum perforatum in amelioration of hypobaric hypoxia induced oxidative stress and associated behavioral deficits in mice.Material and Methods: Male Balb/c mice were exposed to simulated altitude of 25,000 ft. for 7 days (6 hr. per day) in a specially designed chamber. Ethanolic extract of Hypericum perforatum (HPE)(25mg/kg of body weight) was given orally prior to hypoxia exposure and effects were compared to hypoxia and control groups.Results: Animals exposed to hypobaric hypoxia showed sign of cognitive deterioration at day 3 and day 7 in the Elevated Plus Maze and Passive Avoidance Step through behavioral paradigms as compare to normoxic animals. Administration of HPE was able to alleviate the amnesic effect in treatment group, indicated by reduction in transfer latencies at day 3(IR-3 = -0.66±0.07) and day 7 IR-7 = -0.81±0.06) in elevated plus maze task and increased passive avoidance step through latency at day 3, (IR-3 = 3.23±0.67),as compared to ±hypoxic mice. Hypoxia group of animals suffered significant oxidative stress compared to normoxic mice as indicated by up-regulated malondialdehyde and total nitrite levels in hippocampal homogenates. The plasma lactate dehydrogenase activity was also increased following hypoxia indicating tissue damage. Co-treatment with HPE in simulated hypobaric hypoxia insult for seven days resulted in significant reduction in malondialdehyde, total nitrites and plasma LDH levels in animals.Conclusion: Hypericum perforatum extract improves cognitive performance in hypobaric hypoxia exposed mice with a concomitant reduction in oxidative stress burden suggesting its plausible use for preventing high altitude illness.Asian Journal of Medical Sciences Vol.9(2) 2018 1-8

scholarly journals Evaluation of the effectiveness of macaíba palm seed kernel (Acrocomia intumescens drude) on anxiolytic activity, memory preservation and oxidative stress in the brain of dyslipidemic rats

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0246184
Author(s):  
Roberta Cristina de França Silva ◽  
Mikaelle Albuquerque de Souza ◽  
Jaielison Yandro Pereira da Silva ◽  
Carolina da Silva Ponciano ◽  
Vanessa Bordin Viera ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Elevated Plus Maze ◽  
Open Field Test ◽  
Central Area ◽  
Seed Kernel ◽  
Total Glutathione ◽  
Object Recognition Test ◽  
Plus Maze ◽  
The Brain ◽  
And Oxidative Stress

Macaíba palm seed kernel is a source of lipids and phenolic compounds. The objective of this study was to evaluate the effects of macaíba palm seed kernel on anxiety, memory, and oxidative stress in the brain of health and dyslipidemic rats. Forty rats were used, divided into 4 groups (n = 10 each): control (CONT), dyslipidemic (DG), kernel (KG), and Dyslipidemic kernel (DKG). Dyslipidemia was induced using a high fat emulsion for 14 days before treatment. KG and DKG received 1000 mg/kg of macaíba palm seed kernel per gavage for 28 days. After treatment, anxiety tests were carried out using the Open Field Test (OFT), Elevated Plus Maze (EPM), and the Object Recognition Test (ORT) to assess memory. In the animals’ brain tissue, levels of malondialdehyde (MDA) and total glutathione (GSH) were quantified to determine oxidative stress. The data were treated with Two Way ANOVA followed by Tukey (p <0.05). Results demonstrated that the animals treated with kernel realized more rearing. DG and KG groomed less compared with CONT and DKG compared with all groups in OFT. KG spent more time in aversive open arms compared with CONT and DKG compared with all groups in EPM. Only DKG spent more time in the central area in EMP. KG and DKG showed a reduction in the exploration rate and MDA values (p <0.05). Data showed that macaíba palm seed kernel consumption induced anxiolytic-like behaviour and decreased lipids peroxidation in rats’ brains. On the other hand, this consumption by healthy and dyslipidemic animals compromises memory.

Antioxidant Activities of Dichrocephala integrifolia (Linn.f.) O. Kuntze (Asteraceae) in a Mice Model of D-Galactose-Induced Oxidative Stress and Accelerated Aging

2017 ◽  
Vol 8 ◽  
pp. 41-53
Author(s):  
Emégam Nadège Kouémou ◽  
Agathe Fotio Lambou ◽  
Mireille Sylviane Dongmo Nguepi ◽  
Agnès Carolle Ouafo ◽  
Simon Palé ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Elevated Plus Maze ◽  
Antioxidant Activities ◽  
Folk Medicine ◽  
Accelerated Aging ◽  
Mice Model ◽  
Neuroprotective Effects ◽  
Learning Deficits ◽  
Plus Maze ◽  
And Oxidative Stress

Dichrocephala integrifolia is a plant widely used in folk medicine in Africa to treat central nervous diseases such as dementia. In the present study, we evaluated the effect of the leave’s decoction of Dichrocephala integrifolia against D-galactose-induced neurotoxicity, oxidative stress and accelerated aging in mice. D-galactose (100 mg/ kg sc), was chronically injected daily to mice during 42 consecutive days after pretreatment with distilled water (10 ml/kg) or the decoction of D. integrifolia (35; 87.5; 175 or 350 mg/kg p.o) or vitamin C (100 mg/kg p.o). Following behavioral tasks (Open Field, Elevated Plus Maze and Morris Water Maze), animals were sacrificed on day 43 and their brains were used to evaluate some biochemical parameters of oxidative stress (malondialdehyde, nitrite oxide and reduced glutathione) and for histopathological assessments. The results of this study showed that a pretreatment of animals with the decoction of D. integrifolia at the doses of 87.5 and 175 mg/kg significantly (p˂0.05) reversed learning deficits, recall of memories and oxidative stress induced by D-galactose. The decoction of D. integrifolia also prevented neurogeneration in the dentate gyrus induced by D-galactose. These results indicated that D. integrifolia possesses neuroprotective effects against D-galactose-induced senescence, probably due to its antioxidant capacities and this can at least explain the wide use of this plant in traditional medicine in Cameroon in the prevention and treatment of dementia.

scholarly journals Anxiogenic Potential of Experimental Sleep Fragmentation Is Duration-Dependent and Mediated via Oxidative Stress State

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Željko Grubač ◽  
Nikola Šutulović ◽  
Sonja Šuvakov ◽  
Djurdja Jerotić ◽  
Nela Puškaš ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Elevated Plus Maze ◽  
Brain Structures ◽  
Sleep Fragmentation ◽  
Brain Disorders ◽  
Significant Determinant ◽  
Stress Assessment ◽  
Plus Maze ◽  
The Brain ◽  
Treadmill Belt

Sleep architecture alterations, among which sleep fragmentation is highly prevalent, represent risk factors for a variety of diseases, ranging from cardiovascular to brain disorders, including anxiety. What mediates anxiety occurrence upon sleep fragmentation is still a matter of debate. We hypothesized that the sleep fragmentation effects on anxiety are dependent on its duration and mediated by increased oxidative stress and alterations in the number of parvalbumin (PV+) interneurons in the hippocampus. Sleep was fragmented in rats by the treadmill method during a period of 14 days (SF group). Rats with undisturbed sleep in the treadmill (TC group) and those receiving equal amounts of treadmill belt motion (EC group) served as controls. To assess anxiety, we subjected rats to the open field, elevated plus maze, and light-dark tests on the 0, 7th, and 14th day. Upon the last test, brain structures were sampled for oxidative stress assessment and PV+ interneuron immunohistochemistry. The results of ethological tests of anxiety-linked behavior suggested duration-dependent anxiogenic potential of sleep fragmentation. Rats’ anxiety-linked behavior upon sleep fragmentation significantly correlated with oxidative stress. The rats with fragmented sleep (SF) showed significantly higher oxidative stress in the hippocampus, thalamus, and cortex, compared to controls (TC and EC), while the antioxidant enzymes’ activity was significantly decreased. No significant differences were observed in hippocampal PV+ interneurons among these groups. Our results showed that duration of sleep fragmentation is a significant determinant of anxiety-linked behavior, and these effects are mediated through oxidative distress in the brain. Herein, it is revealed that the sleep fragmentation-oxidative stress-anxiety axis contributes to our better understanding of pathophysiological processes, occurring due to disrupted sleep patterns.

Anxiolytic effects of fractions obtained from Passiflora incarnata L. in the elevated plus maze in mice

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
C Sampath ◽  
M Holbik ◽  
L Krenn ◽  
V Butterweck
Keyword(s):  
Elevated Plus Maze ◽  
Plus Maze ◽  
Passiflora Incarnata
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