Rebaudioside A inhibits pentylenetetrazol-induced convulsions in rats

AbstractThe safety of patients with epilepsy consuming sweetening agents, which is becoming increasingly prevalent for various reasons, is a topic that should be emphasized as sensitively as it is for other diseases. Patients with epilepsy consume sweetening agents for different reasons such being diabetic or overweight. They can occasionally be exposed to sweetening agents unrestrainedly through consuming convenience food, primarily beverages. This study aimed to investigate the effects of rebaudioside A (Reb-A), which is a steviol glycoside produced from the herb Stevia rebaudiana (Bertoni), on epileptic seizures and convulsions induced by pentylenetetrazole (PTZ). Forty-eight male rats were used. Twenty-four rats were administered 35 mg/kg PTZ to trigger epileptiform activity; the remaining 24 rats were administered 70 mg/kg PTZ to trigger the convulsion model. The epileptiform activity was evaluated by spike percentage, whereas convulsion was evaluated by Racine's Convulsion Scale and the onset time of the first myoclonic jerk. Statistical analysis revealed a statistically significant decrease in the Racine's Convulsion Scale score and increase in the latency of first myoclonic jerk in a dose-dependent manner for the rat groups in which PTZ epilepsy had been induced and Reb-A had been administered. For the groups that were administered Reb-A, the spike decrease was apparent in a dose-dependent manner, based on the spike percentage calculation. These results indicated that Reb-A has positive effects on PTZ-induced convulsions

Traction Vasculogenesis: Experimental Vessel Elongation by Traction in Rat Model

WOS: 000462822700002Background: Microsurgeons may face inadequate vessel length in traumatic or post-resection vascular defects and flap surgery. As tissue regeneration by mechanical forces is possible like in tissue expansion and distraction osteogenesis, we questioned the effect of traction forces on isolated vessels, generated by an internal maxillary distraction device to overcome such problem. Methods: 30 Wistar-Albino rats were randomized in two groups as control and traction. By an internal maxillary distraction device placed subcutaneously to abdominal region, femoral artery and vein of traction group were applied daily traction for 10 days perpendicular to their course. Control group received the same procedure but no traction was applied. Vessel length, blood flow and histologic and microangiographic changes were evaluated on postoperative 11th day. Results: Final length of vessels was found to be higher in the traction group (21.93 mm) compared to control group (12.86 mm). (P = 0.000) Blood-flow patency rate of artery and vein was found 100 % in control group (n = 15) and 80 % in experiment group (n = 12). Microangiographic study showed patent blood flow in both control and traction groups. Histologic evaluation showed vascular wall thickening, perivascular adipocyte and neutrophil infiltration and vein lumen enlargement compared to control group. Conclusion: The preliminary "traction vasculogenesis" technique is found to be a promising technique to gain vessel length in vascular shortness problems. With further studies and refinements this technique may be carried to clinical applications in cases of vascular inadequacy

Beneficial effects of agomelatine in experimental model of sepsis-related acute kidney injury

WOS: 000374753400002PubMed ID: 27193977BACKGROUND: Sepsis-related acute kidney injury (AKI) is a serious complication of sepsis. Problems persist regarding early diagnosis and treatment of AKI. The aim of the present study was to evaluate the efficacy of agomelatine, which is primarily known for its positive effects on depressive and anxiety disorders in sepsis-related AKI. METHODS: Sepsis model was created with cecal ligation puncture (CLP). Rats were separated into 4 groups of 8 each: the control group, the sham-operated group, the CLP+saline group, and the CLP+agomelatine group. Agomelatine was administered intraperitoneally in doses of 20 mg/kg. RESULTS: In the agomelatine group, reductions were observed in levels of tumor necrosis factor alpha (TNF-alpha), malondialdehyde (MDA), blood urea nitrogen (BUN), and creatinine, as well as in histological kidney scores, compared to the non-treated group. In addition, it was demonstrated that agomelatine treatment had positive effect on sepsis-induced morphological damage to renal and tubular tissues. CONCLUSION: Agomelatine showed strong efficacy in sepsis-related AKI, demonstrated with histological and biochemical results in an experimental model. It is believed that antioxidant and pro-inflammatory effects of agomelatine are responsible for the improvement in kidneys

Anticancer activity of linalool: comparative investigation of ultrastructural changes and apoptosis in breast cancer cells

Breast cancer is the most common cancer in women in the world. Many anticancer drugs are currently used clinically have been isolated from plant species or are based on such substances. Linalool is aromatic compounds from the monoterpene group. It is the main constituents of essential oils and show antiproliferative, antioxidant, and antiseptic properties. The aim of this study was to investigate the antiproliferativeand apoptotic, effects of linalool in MCF-7 and MDA-MB-231 human breast cancer cells. MCF-7 and MDA-MB-231 human breast cancer cells were treated with different concentrations of linalool (100, 200, 400, 600, 800, 1000 mu M) at 24 h and 48 h. MTT assay for cell proliferation and Annexin V assay for apoptosis was done. The morphology of breast cancer cells was investigated by light microscope and scanning electron microscope (SEM). The study show that linalool significantly induced apoptosis in all groups as dose and time-dependent (p < .05). Linalool has apoptotic and antiproliferative properties in a concentration and time-dependent manner in breast cancer cells. The cytotoxic effects of linalool on MCF-7 and MDA-MB-231 human breast cancer cells was found to be associated with apoptotic cell death. Linalool was more effective on MCF-7 human breast cancer cells in smaller amounts.Scientific Research Fund of Mugla Sitki Kocman University [17/061]This study was financially supported by a grant from Scientific Research Fund of Mugla Sitki Kocman University (Grant number: 17/061)

The neuroprotective effect of erythropoietin on experimental Parkinson model in rats

WOS: 000350935400001PubMed ID: 25464888Dopaminergic neuronal loss in Parkinson's disease (PD) results from oxidative stress, neuroinflammation and excitotoxicity. Because erythropoietin (EPO) has been shown to have antioxidant, anti-inflammatory and neuroprotective effects in many previous studies, present study was designed to evaluate the effect of EPO on rotenone-induced dopaminergic neuronal loss. The rats in which PD was induced by stereotaxical infusion of rotenone showed increased MDA and TNF-alpha levels and decreased HVA levels. On the other hand, EPO treatment resulted in markedly decreased MDA and TNF-alpha levels and increased HVA levels. EPO treatment in rotenone-infusion group resulted in improvement of striatal neurodegeneration and a significant increase in decreased total number of neurons and immunohistochemical TH positive neurons. Results of the present study demonstrate the neuroprotective, anti-inflammatory and antioxidant effects of EPO in a rotenone-induced neurodegenerative animal model. (C) 2014 Elsevier Ltd. All rights reserved

The Protective Role of Resveratrol on Diabetic Cardiomyopathy

13th International Congress of Update in Cardiology and Cardiovascular Surgery (UCCVS) -- MAR 23-26, 2017 -- Cesme, TURKEYWOS: 00040730920007

Neuroprotective Effects of Eexenatide in a Rotenone-Induced Rat Model of Parkinson's Disease

WOS: 000410832600017PubMed ID: 28918840Backround: Several studies suggest an association between Parkinson's disease (PD) and type 2 diabetes mellitus; these 2 diseases are both known to affect the common molecular pathways. As a synthetic agonist for the glucagon-like peptide 1 receptor, exenatide has been evaluated as a neuroprotective agent in multiple animal models. Rotenone models of PD have great potential for the investigation of PD pathology and motor and nonmotor symptoms, as well as the role of gene environment interactions in PD causation and pathogenesis. Therefore, in this study, the neurochemical, behavioral and histologic effects of exenatide on a rotenone-induced rat model of PD were examined. Materials and Methods: Eighteen adult male rats were randomly divided into the following 3 groups (n = 6): 1 group received stereotaxical infusion of dimethyl sulfoxide (vehicle, group 1) and the others received stereotaxical infusion of rotenone (groups 2 and 3). Apomorphine-induced rotation test was applied to the rats after 10 days. Thereafter, group 2 was administered isotonic saline, whereas group 3 was administered exenatide for 28 days. Results: Malondialdehyde and tumor necrosis factor alpha levels increased in the rats with PD induced by rotenone, whereas malondialdehyde and tumor necrosis factor alpha levels markedly decreased in the rats treated with exenatide. The apomorphine-induced rotation test scores of exenatide-treated rats were determined to be lower compared with the untreated group. Additionally, treatment with exenatide significantly reduced the loss of dopaminergic neurons in striatum. Conclusions: These results have shown that exenatide has neuroprotective, anti-inflammatory and antioxidant effects in a rotenone-induced rat model of PD

Neuroprotective effects of erythropoietin on Alzheimer's dementia model in rats

WOS: 000396391300003PubMed ID: 28397428Background. Although Alzheimer's disease (AD) is the most common age-related neurodegenerative disease and characterized by memory impairment, only symptomatic treatments are available. Objectives. Because recombinant human erythropoietin (rhEPO) has various neuroprotective effects and improves cognitive function in animal models of neurodegenerative disorders, we investigated the therapeutic effects of rhEPO in an intracerebroventricular (ICV)-streptozotocin (STZ) animal model of sporadic-AD. Material and methods. A total of 24 Sprague-Dawley adult rats were divided into 4 groups of naive control (n = 6), sham-operated (n = 6), ICV-STZ + saline (n = 6) and ICV-STZ + rhEPO (n = 6). Twelve rats with Alzheimer's disease, induced by STZ injection (3 mg/kg) into both lateral ventricles using a stereotaxic frame (bilaterally ICV-STZ), were divided into 2 groups 5 days after the STZ injection: one treated with rhEPO 5000 (IU/kg/day, i.p.) and the other with 0.9% NaCl (1 mL/kg/day, i.p.) for 2 weeks. The sham-operated rats received bilaterally ICV-0.9% NaCl. No surgical operation or treatment was given to the naive-control animals. On day 20, a passive avoidance learning (PAL) test was used followed by sacrification and removal of the brain tissue in all animals. Brain TNF-a and ChAT levels were determined, and neurons in the hippocampal CA1 and CA3 regions were counted by Cresyl violet staining. Results. ICV-STZ was found to significantly shorten the latency time on the PAL, increase brain TNF-alpha level, and decrease brain ChAT activity and the number of neurons in the hippocampal CA1 and CA3 regions. On the other hand, rhEPO significantly attenuated all these detrimental effects induced by STZ. Conclusions. RhEPO treatment significantly prevented the ICV-STZ-induced memory deficit by attenuating the hippocampal neuronal loss, neuroinflammation and cholinergic deficit in rats. This result suggests that rhEPO may be beneficial for treating AD

Comparison of ultrastructural changes and the anticarcinogenic effects of thymol and carvacrol on ovarian cancer cells: which is more effective?

Cavusoglu, Turker/0000-0001-7100-7080WOS: 000520568500001PubMed: 32183603Ovarian cancer is the seventh most common cancer worldwide in women. Many anticancer drugs are currently used clinically have been isolated from plant species or are based on such substances. Thymol (5-methyl-2-isopropylphenol) and carvacrol are oxygenated aromatic compounds from the monoterpene group. They are the main constituents of thyme essential oil and show antiproliferative, antioxidant, and antiseptic properties. the aim of this study is to compare the antiproliferative and apoptotic effects of thymol and carvacrol on SKOV-3 ovarian cancer cell line. the cancer cells were treated with different concentrations of thymol and carvacrol (100, 200, 400, 600 mu M) at 24 h and 48 h durations. the cell viability was investigated by MTT assay and analysis of apoptosis with annexin V assay was determined. the study show that thymol and carvacrol significantly induced apoptosis in all groups as dose and time-dependent (p < .05). the data in the present study demonstrated that thymol and carvacrol have apoptotic and antiproliferative properties in a concentration-dependent manner toward ovarian cancer cells. SKOV-3 cancer cell line was much more sensitive to the toxic effect of thymol than carvacrol.Mugla Sitki Kocman University Research Projects Coordination OfficeMugla Sitki Kocman University [17/062]This study has been granted by the Mugla Sitki Kocman University Research Projects Coordination Office through Project Grant Number: (17/062). the funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscrip

Positive effects of ceftriaxone on pentylenetetrazol-induced convulsion model in rats

WOS: 000365723100011PubMed ID: 25479320Aims: Many drugs have been associated with seizures as a side effect. Although they are defined as safe for nervous system. The effect on proconvulsant activity of beta lactam antibiotics have been also reported. We aimed to investigate whether ceftriaxone has an anticonvulsant effect on PTZ-induced seizures in rats. Materials and Methods: 36 male Sprague-Dawley rats, 18 of them for EEG recording and 18 of them are for behavioral studies, were randomly divided in two groups: group A for EEG recordings and group B for behavioral assesment. About 70mg/kg PTZ was used for behavioral studies after Ceftriaxone administiration. About 35mg/kg PTZ were used for EEG recording after ceftriaxone administiration. The electrodes were implanted on dura over the left frontal cortex and the reference electrode was implanted over the cerebellum for EEG recording. The Racine convulsion scale, first myoclonic jerk onset time, spike percentages, brain MDA and SOD levels were evaluated between the groups. Results: First myoclonic jerk onset time was significantly shorter in saline group than both 200 and 400mg/kg ceftriaxone groups (p < 0.05). Racine's convulsion scale was significantly lower in 200 and 400mg/kg ceftriaxone groups than saline group (p < 0.01, p < 0.0001). Both of two ceftriaxone groups have lower spike percentages than the saline group (p < 0.05). Significantly lower MDA levels and higher SOD activity were determined in 200mg/kg ceftriaxone group compared with the saline group (p < 0.05). Conclusion: Our study demonstrated that ceftriaxone has protective effects on PTZ-induced convulsions and on oxidative damage associated with PTZ