scholarly journals Effects of holothuria extract on pain behaviour and Fos like immunoreactivity (FLI) in formalin pain

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Che Badariah AA ◽  
Asma HA ◽  
Mohd Nizam H ◽  
Siti FA
Keyword(s):  
Phase 1 ◽  
Intraperitoneal Administration ◽  
Male Rats ◽  
Repeated Measure ◽  
Saline Control ◽  
Control Group ◽  
Formalin Injection ◽  
Intraplantar Injection ◽  
Pain Behaviour ◽  
Behaviour Score

Introduction: The aim of this study was to determine the effects of gamat extract on pain behaviour and Fos like immunoreactivity (FLI) expression in the ventral posterolateral thalamus using the acute pain model. Materials & Methods: Fourteen Sprague-Dawley male rats (220-300 gram) were given intraplantar injection of 0.05ml formalin (1%) followed by intraperitoneal administration of either 4 mg/kg gamat extracts (Holothuria spp.) or saline (control). Behavioural changes were observed and rats were sacrificed 2 hours post-formalin injection. Immunohistochemistry testing was done on the brain sections. FLI was examined using a light microscope attached to an image analyser. The behaviour and FLI data were analysed using repeated measure analysis of variance and independent t-test respectively. Significance level was taken as p<0.05. Results: The control group has significantly higher pain scores compared to holothuria group (F (1) =13.635, p=0.003). There was significant reduction in the pain behaviour score in the holothuria group when compared to the control group in phase 1 (t (14) =2.9, p=0.012) and most of the time from 15 to 60 minutes post-formalin injection (t (12) =3.535, p=0.004). There was a significant reduction (P<0.05) in the number of FLI on the contralateral aspect of the ventral posterolateral thalamic nucleus in the group that received 4mg/kg of holothuria extract (63  3.18) compared to control group (84   6.36). Conclusion: This study showed that administration of holothuria extract significantly suppressed the pain behaviour and reduced the number of FLI in formalin injected rats compared to control.

scholarly journals Hepatoprotective Effect of Melatonin in Toxic Liver Injury in Rats

Medicina ◽  
2019 ◽  
Vol 55 (6) ◽  
pp. 304 ◽  
Author(s):  
Oleshchuk ◽  
Ivankiv ◽  
Falfushynska ◽  
Mudra ◽  
Lisnychuk
Keyword(s):  
Liver Injury ◽  
Hepatoprotective Effect ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Radical Scavenger ◽  
Thiobarbituric Acid Reactive Substance ◽  
Lipid Hydroperoxides ◽  
Significant Difference ◽  
Toxic Liver Injury

Background and objectives: toxic liver injury results in nitrooxidative stress. Melatonin is a potent free radical scavenger, an inducible nitric oxide synthase (iNOS) inhibitor and an activator of antioxidant enzymes. The aim of this study was to investigate the hepatoprotective effect of exogenous melatonin on animals with acute toxic hepatitis. Material and methods: 36 healthy Sprague-Dawley male rats were split into three equal groups and given carbon tetrachloride (CCl4), 2 g/kg (CCl4 group) or the same dose of CCl4 and melatonin, 10 mg/kg (CCl4/melatonin group) or saline (control group). The effect of melatonin on prooxidant and antioxidant system indexes, NO and NOS levels in serum and liver, data of mitochondrial chain functions and cytolysis in liver were evaluated in all three groups. Results: melatonin significantly decreased activities of AST, ALT, ceruloplasmine and thiobarbituric acid reactive substance (TBARS) in serum. Catalase activity was lowered in serum but not in the liver. Hepatic TBARS, lipid hydroperoxides and glutathione concentrations were decreased, while superoxide dismutase, mitochondrial cytochrome oxidase and succinate dehydrogenase activities increased. Melatonin inhibited synthesis of stable NO metabolites in serum: NO2-by 37.9%; NO3-by 29.2%. There was no significant difference in content NO2-in the liver, but concentration of NO3-increased by 32.6%. Melatonin significantly reduced iNOS concentrations both in serum (59.7%) and liver (57.8%) but did not affect endothelial isoform enzyme activities neither in serum, nor in liver. The histopathological liver lesions observed in the CCl4/melatonin group were less severe than those seen in the CCl4 group. Conclusions: we demonstrated an ameliorating effect of melatonin on prooxidants and antioxidants, NO-NOS systems balance, mitochondrial function and histopathological lesions in the liver in rats with CCl4-induced hepatitis.

scholarly journals Effect of Methyltrienolone on the Metabolic Disorders in Rat Model of Alloxan-Induced Diabetes

2017 ◽  
Vol 13 (15) ◽  
pp. 22
Author(s):  
Neli Didebulidze MBiol ◽  
Sopiko Kandelaki ◽  
Manana Kakabadze ◽  
Salome Kordzaia ◽  
Dimitri Kordzaia ◽  
...  
Keyword(s):  
Rna Synthesis ◽  
Androgen Receptors ◽  
Control Level ◽  
Intraperitoneal Administration ◽  
Receptor Expression ◽  
Male Rats ◽  
Control Group ◽  
Dna And Rna ◽  
Hormonal Dysfunction ◽  
Metabolic Imbalance

Aim: The aim of the study was to investigate the restoration of metabolic imbalance related with deficiency of insulin by the exogenous androgen supplementation in the experimental model of alloxan-induced diabetes in Wistar male rats. Methods: The experimental diabetes was induced by a single intraperitoneal administration of alloxan. The concentrations of glucose, immunereactive insulin, corticosterone, testosterone and estradiol were examined in blood, the intensity of DNA and RNA synthesis and androgen receptor expression were studied in the liver tissue – at 15th, 30th and 45th days of alloxan-induced diabetes. The synthetic androgen methyltrienolone was administered to rats with 30-days diabetes during 15 days. All data were compared to control group received solvent. Results: The induction of diabetes increased the concentrations of glucose, corticosterone and estradiol while decreases insulin and testosterone concentration in blood as well as DNA/RNA synthesis and androgen receptors expression in hepatocytes. The administration of exogenous androgen significantly restored the metabolic imbalance and the expression of androgen receptors and increased DNA/RNA synthesis in liver cells maintained close to control level. Conclusion: The administration of methyltrienolone reduced the effect of “diabetic stress” and restored the hormonal dysfunction induced by alloxan.

scholarly journals The Dynamics of Subcutaneous Tissue Response to Microorganisms Associated with the Extract of Araçá (Psidium cattleianum): An Edemogenic and Microscopic Analysis

2017 ◽  
Vol 20 (2) ◽  
pp. 93 ◽  
Author(s):  
Alessandra Cury Machado ◽  
Denise Belucio Ruviere ◽  
Renata Zoccal Novais ◽  
Carlos Roberto Emerenciano Bueno ◽  
Elerson Gaetti Jardim Jr ◽  
...  
Keyword(s):  
Subcutaneous Tissue ◽  
Tissue Response ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Dorsal Region ◽  
Hydroalcoholic Extract ◽  
Psidium Cattleianum ◽  
Significant Difference

<p><strong>Objective:</strong> To evaluate <em>in vivo </em>tissue reaction to the extract of araçá (<em>Psidium cattleianum</em>) associated with inactivated microorganisms. <strong>Material and Methods:</strong> A 0.1 mL suspension was used containing Porphyromonas gingivalis, Prevotella intermedia, <em>Fusobacterium nucleatum, Enterococcus faecalis, Peptostreptococcus micros</em>, and <em>Porphyromonas endodontalis,</em> which were inactivated by heat and mixed into a 1.0 mL saline (control group), an aqueous solution, or a hydroalcoholic extract of araçá. Eighteen male rats (<em>Rattus norvegiccus</em>) under general anesthesia received 0.2 mL of 1% intravenous Evans blue. Thirty minutes later, 0.1 mL of one of the associations was injected into the animals’ dorsal region. The animals were euthanized after 3 and 6 hours, and the materials obtained were placed in formamide for 72 hours then analyzed in a spectrophotometer (λ=630 hm). For the morphological analysis, 30 rats received polyethylene tubes implants with the extracts or the saline with the associations in the dorsal region and euthanized after 7 and 30 days to be analyzed according to an inflammation cell score. <strong>Results:</strong> No significant difference (p&gt;0.05) was observed in the edema among groups. The optical microscopy results showed a repair in the 30-day-period, which was higher when compared to the 7-day-period (p&lt;0.0001). Nevertheless, in the 7-day-period, the hydroalcoholic extract presented a significant response compared to the aqueous extract (p=0.05) and a trend for better results than the control group. <strong>Conclusion: </strong>The aqueous and hydroalcoholic araçá extracts associated with inactivated microorganisms showed similar responses to control, indicating no interference on the toxic effects of the bacterial components in tissue repair.</p><p><strong>Keywords</strong></p><p>Anaerobic bacteria; Edema; Inflammation; Plant extracts; <em>Psidium.</em></p>

Sex Differences in Cholinergic Analgesia II 

1999 ◽  
Vol 91 (5) ◽  
pp. 1455-1455 ◽  
Author(s):  
Patricia M. Lavand'homme ◽  
James C. Eisenach
Keyword(s):  
Nerve Injury ◽  
Sex Difference ◽  
Female Rats ◽  
Male Rats ◽  
Saline Control ◽  
Muscarinic Agonist ◽  
Intraplantar Injection ◽  
Male And Female Rats ◽  
Adrenergic Antagonist ◽  
Cholinergic Agents

Background Cholinergic agents reduce allodynia after nerve injury in animals and may be useful in the treatment of neuropathic pain. Intrathecally administered neostigmine and neuronal nicotinic agonists are more potent in female than in male rats against acute thermal noxious stimuli. The purpose of this study was to determine whether there is also a sex difference in the antiallodynic effects of intrathecal cholinomimetic agents in two models of allodynia and to test their pharmacologic mechanisms. Methods Male and female rats with indwelling intrathecal catheters received injections of neostigmine, bethanechol (muscarinic agonist), RJR-2403 (neuronal nicotinic agonist) alone or with atropine (muscarinic antagonist), mecamylamine (nicotinic antagonist), phentolamine (alpha-adrenergic antagonist), or saline control. The effect of these agents was determined on mechanical allodynia produced by either intraplantar injection of capsaicin or ligation of spinal nerves. Results Neostigmine and RJR-2403 but not bethanechol were more potent in female than in male rats in reducing allodynia after nerve injury, and antagonist studies were also consistent with a nicotinic component to explain this sex difference. Phentolamine did not reverse neostigmine's effect. In contrast, for capsaicin-induced allodynia, neostigmine plus mecamylamine but not neostigmine or RJR-2403 was more potent in female than in male rats. Conclusions These data demonstrate a sex difference of intrathecal neostigmine after nerve injury-induced allodynia similar to that observed in normal animals that received acute noxious thermal stimulation. However, this sex difference is not universal to all pain models because it was not present after intradermal capsaicin injection, nor is its interaction with spinal noradrenergic mechanisms consistent in all models.

scholarly journals Long-Term Adverse Effects of Oxidative Stress on Rat Epididymis and Spermatozoa

Antioxidants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 170 ◽  
Author(s):  
Pei You Wu ◽  
Eleonora Scarlata ◽  
Cristian O’Flaherty
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Antioxidant Enzymes ◽  
Sperm Quality ◽  
Dna Oxidation ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Long Term Effects

Oxidative stress is a common culprit of several conditions associated with male fertility. High levels of reactive oxygen species (ROS) promote impairment of sperm quality mainly by decreasing motility and increasing the levels of DNA oxidation. Oxidative stress is a common feature of environmental pollutants, chemotherapy and other chemicals, smoke, toxins, radiation, and diseases that can have negative effects on fertility. Peroxiredoxins (PRDXs) are antioxidant enzymes associated with the protection of mammalian spermatozoa against oxidative stress and the regulation of sperm viability and capacitation. In the present study, we aimed to determine the long-term effects of oxidative stress in the testis, epididymis and spermatozoa using the rat model. Adult male rats were treated with tert-butyl hydroperoxide (t-BHP) or saline (control group), and reproductive organs and spermatozoa were collected at 3, 6, and 9 weeks after the end of treatment. We determined sperm DNA oxidation and motility, and levels of lipid peroxidation and protein expression of antioxidant enzymes in epididymis and testis. We observed that cauda epididymal spermatozoa displayed low motility and high DNA oxidation levels at all times. Lipid peroxidation was higher in caput and cauda epididymis of treated rats at 3 and 6 weeks but was similar to control levels at 9 weeks. PRDX6 was upregulated in the epididymis due to t-BHP; PRDX1 and catalase, although not significant, followed similar trend of increase. Testis of treated rats did not show signs of oxidative stress nor upregulation of antioxidant enzymes. We concluded that t-BHP-dependent oxidative stress promoted long-term changes in the epididymis and maturing spermatozoa that result in the impairment of sperm quality.

scholarly journals Evaluation of the effect of filtered ultrafine particulate matter on bleomycin-induced lung fibrosis in a rat model using computed tomography, histopathologic analysis, and RNA sequencing

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cherry Kim ◽  
Sang Hoon Jeong ◽  
Jaeyoung Kim ◽  
Ja Young Kang ◽  
Yoon Jeong Nam ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Rna Sequencing ◽  
Rat Model ◽  
Lung Fibrosis ◽  
Chest Ct ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Histopathologic Evaluation ◽  
Pathologic Analysis

AbstractWe aimed to investigate the effect of chronic particulate matter (PM) exposure on bleomycin-induced lung fibrosis in a rat model using chest CT, histopathologic evaluation, and RNA-sequencing. A bleomycin solution was intratracheally administrated to 20 male rats. For chronic PM exposure, after four weeks of bleomycin treatment to induce lung fibrosis, PM suspension (experimental group) or normal saline (control group) was intratracheally administrated for 10 weeks. Chest CT was carried out in all rats, and then both lungs were extracted for histopathologic evaluation. One lobe from three rats in each group underwent RNA sequencing, and one lobe from five rats in each group was evaluated by western blotting. Inflammation and fibrosis scores in both chest CT and pathologic analysis were significantly more aggravated in rats with chronic PM exposure than in the control group. Several genes associated with inflammation and immunity were also upregulated with chronic PM exposure. Our study revealed that chronic PM exposure in a bleomycin-induced lung fibrosis rat model aggravated pulmonary fibrosis and inflammation, proven by chest CT, pathologic analysis, and RNA sequencing.

scholarly journals Effect of Intracerebroventricular Morphine Withdrawal on Anxiety Behavior in Male Rats Reared in Social Isolation

2019 ◽  
Vol 25 (4) ◽  
pp. 352-363
Author(s):  
Ghasemali Khodabandeh ◽  
◽  
Gholamhassan Vaezi ◽  
Vida ‎ Hojati ◽  
Sharam ‎ Sharafi ◽  
...  
Keyword(s):  
Social Isolation ◽  
Sulfate Solution ◽  
Morphine Withdrawal ◽  
Morphine Sulfate ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Emotional States ◽  
Daily Consumption ◽  
Chronic Morphine

Aims Narcotics prescription has controversial effects on the occurrence of anxiety processes; however, its acute and chronic effects on behavioral differences in social isolation are unclear in the processes of dependence and withdrawal. The present study aimed to investigate the effects of acute and chronic intracerebroventricular morphine sulfate withdrawal on the fear and anxiety behaviors of male rats reared in social isolation. Methods & Materials The present experimental study investigated 32 male 21-day-old male weaned Wistar rats that were divided into two groups of saline (control) and morphine receivers (test). They were then divided into acute and chronic subgroups that were reared under social isolation conditions. The rats of the acute daily consumption group received 10 μg/kg of morphine sulfate solution via intracerebroventricular injection for 10 days, but the chronic rats received it for 60 days. After the end of dependence by its withdrawal, the rats were quitted for 5 days, and their anxiety levels were measured using the Elevated Plus Maze (EPM). The obtained data were analyzed in SPSS using one-way Analysis of Variance (ANOVA), Tukey’s posthoc test and Paired Samples t-test. Findings The research results indicated that the percentage of time and number of open arm entries in rats reared in social isolation significantly decreased during the dependence phase and 5 days after withdrawal in acute and chronic groups (P<0.001). Furthermore, their anxiety rate increased compared to the control group. The findings also suggested a higher incidence of anxiety among chronic consumer groups than acute consumer groups after abstinence. Conclusion The study findings indicated that the discontinuation of morphine consumption in social isolation could increase the incidence of anxiety behaviors in rats. Therefore, negative emotional states associated with acute and chronic morphine withdrawal could lead to anxiety-like behaviors.Keywords: Anxiety, Morphine, Social isolation, Rats.

Anti-nociceptive and anti-inflammatory effects of Withania somnifera root in fructose fed male rats

2016 ◽  
Vol 27 (4) ◽  
pp. 387-391
Author(s):  
Mohammad Reza Shahraki ◽  
Zahra Samadi Noshahr ◽  
Hassan Ahmadvand ◽  
Alireza Nakhaie
Keyword(s):  
Insulin Resistance ◽  
Drinking Water ◽  
Withania Somnifera ◽  
Resistance Index ◽  
Chronic Administration ◽  
Male Rats ◽  
Control Group ◽  
Intraplantar Injection ◽  
Insulin Resistance Index ◽  
Anti Inflammatory

Abstract Background: Insulin resistance is a metabolic disorder which affects the diabetes mellitus pathophysiology and alters the cell excitability. This study has been designed to evaluate the anti-nociceptive and anti-inflammatory effects of chronic administration of Withania somnifera root (WSR) in fructose drinking water rats. Methods: An experiment was carried out on 48 Wistar-Albino male rats, weighting 200±30 g, which were divided into six groups (n=8): control group (C), control morphine (CM), W. somnifera group (WS) which received WSR (62.5 mg/g diet), W. somnifera naloxone group (WSN) which received WSR and naloxone, fructose (F) group which received fructose drinking water and FWS group which received fructose-enriched drinking water and WSR during the trial period. A biphasic pain response was induced after intraplantar injection of formalin (50 μL, 1%). Pain behavior was measured using Dubuisson methods. The obtained data were analyzed by SPSS software V. 18, using ANOVA and Tukey test. Results were expressed as mean±SD. Statistical differences were considered significant at p<0.05. Results: The results showed that the insulin resistance index, blood sugar, insulin, IL-6, TNF-α, and acute and chronic pain score in the F group were significantly increased in comparison with the control group, but these parameters in the FWS group were significantly decreased compared with the F group (p<0.001). Conclusions: Our findings indicated that chronic oral administration of WSR has analgesic and anti-inflammatory effects in fructose drinking water rats and causes improved insulin resistance index.

Proliferative activity of the epithelial sheet of the mucous membrane in the lower airways during experimental diabetes mellitus

2013 ◽  
Vol 59 (3) ◽  
pp. 27-29
Author(s):  
O A Pivovarova ◽  
B N Man'kovskiĭ
Keyword(s):  
Diabetes Mellitus ◽  
Experimental Diabetes ◽  
Intraperitoneal Administration ◽  
Male Rats ◽  
Control Group ◽  
Intact Male ◽  
Buffer Solution ◽  
Solution Ph ◽  
Citrate Buffer ◽  
Epithelial Sheet

The present study was designed to develop the experimental model of diabetes mellitus based on 5-6 month-old Wistar rats weighing 234.00±2.64 g (n=47). Diabetes was induced by a single intraperitoneal administration of streptozotocin (60 mg/kg, "Sigma", USA) in a 0.1 M citrate buffer solution, pH 4.5. The control group was comprised of 43 intact male rats. The animals with experimental diabetes had a reduced number of secretory cell nuclei per unit area of the epithelial sheet of the bronchial tree; the area of epitheliocyte nuclei also decreased.

scholarly journals Exploring with [18F]UCB-H the in vivo Variations in SV2A Expression through the Kainic Acid Rat Model of Temporal Lobe Epilepsy

2020 ◽  
Vol 22 (5) ◽  
pp. 1197-1207 ◽  
Author(s):  
Maria Elisa Serrano ◽  
Mohamed Ali Bahri ◽  
Guillaume Becker ◽  
Alain Seret ◽  
Charlotte Germonpré ◽  
...  
Keyword(s):  
Temporal Lobe Epilepsy ◽  
Kainic Acid ◽  
Temporal Lobe ◽  
Rat Model ◽  
Chronic Phase ◽  
Male Rats ◽  
Saline Control ◽  
Control Group ◽  
Significant Group

Abstract Purpose The main purpose of this study was to understand how the positron emission tomography (PET) measure of the synaptic vesicle 2A (SV2A) protein varies in vivo during the development of temporal lobe epilepsy (TLE) in the kainic acid rat model. Procedures Twenty Sprague Dawley male rats were administered with multiple systemic doses of saline (control group, n = 5) or kainic acid (5 mg/kg/injection, epileptic group, n = 15). Both groups were scanned at the four phases of TLE (early, latent, transition, and chronic phase) with the [18F]UCB-H PET radiotracer and T2-structural magnetic resonance imaging. At the end of the scans (3 months post-status epilepticus), rats were monitored for 7 days with electroencephalography for the detection of spontaneous electrographic seizures. Finally, the immunofluorescence staining for SV2A expression was performed. Results Control rats presented a significant increase in [18F]UCB-H binding at the last two scans, compared with the first ones (p < 0.001). This increase existed but was lower in epileptic animals, producing significant group differences in all the phases of the disease (p < 0.028). Furthermore, the quantification of the SV2A expression in vivo with the [18F]UCB-H radiotracer or ex vivo with immunofluorescence led to equivalent results, with a positive correlation between both. Conclusions Even if further studies in humans are required, the ability to detect a progressive decrease in SV2A expression during the development of temporal lobe epilepsy supports the use of [18F]UCB-H as a useful tool to differentiate, in vivo, between healthy and epileptic animals along with the development of the epileptic disease.

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