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https://www.readbyqxmd.com/read/29338667/docosahexaenoic-acid-prevents-resistance-to-antiepileptic-drugs-in-two-animal-models-of-drug-resistant-epilepsy
#1
Melika Moezifar, Mohammad Sayyah, Morteza Zendehdel, Hakimeh Gavzan
OBJECTIVES: One-third of epileptic patients are resistant to antiepileptic drugs. Few clinical studies with small sample size indicate that polyunsaturated fatty acids could control drug-resistant epilepsy. We examined the efficacy of acute and chronic administration of docosahexaenoic acid (DHA) in two animal models of drug-resistant epilepsies, i.e. 6-Hz psychomotor seizures in mice and lamotrigine (LTG)-resistant kindled rats. METHODS: Mice received a single injection of DHA (300 µM, i...
January 16, 2018: Nutritional Neuroscience
https://www.readbyqxmd.com/read/29335158/arvanil-olvanil-am-1172-and-ly-2183240-various-cannabinoid-cb1-receptor-agonists-increase-the-threshold-for-maximal-electroshock-induced-seizures-in-mice
#2
Piotr Tutka, Aleksandra Wlaź, Magdalena Florek-Łuszczki, Patrycjusz Kołodziejczyk, Dorota Bartusik-Aebisher, Jarogniew J Łuszczki
BACKGROUND: Recent evidence reveals therapeutic potential for cannabinoids to reduce seizure frequency, severity and duration. Animal models are useful tools to determine the potential antiseizure or antiepileptic effects of cannabinoids. The objective of this study was evaluation of the effect of arvanil, olvanil, AM 1172 and LY 2183240, the compounds interacted with endocannabinoid and/or endovanilloid systems, on convulsions in the commonly used model of convulsions in mice. METHODS: Arvanil and olvanil were injected intraperitoneally (ip) 30 min and AM 1172 and LY 2183240 were administered ip 60 min before the maximal electroshock seizure threshold (MEST) test...
August 24, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29331789/anticonvulsant-activities-of-%C3%AE-asaronol-e-3-hydroxyasarone-an-active-constituent-derived-from-%C3%AE-asarone
#3
Xirui He, Yajun Bai, Min Zeng, Zefeng Zhao, Qiang Zhang, Ning Xu, Fanggang Qin, Xiaoyang Wei, Meimei Zhao, Ni Wu, Zehua Li, Yajun Zhang, Tai-Ping Fan, Xiaohui Zheng
BACKGROUND: Epilepsy is one of chronic neurological disorders that affects 0.5-1.0% of the world's population during their lifetime. There is a still significant need to develop novel anticonvulsant drugs that possess superior efficacy, broad spectrum of activities and good safety profile. METHODS: α-Asaronol and two current antiseizure drugs (α-asarone and carbamazepine (CBZ)) were assessed by in vivo anticonvulsant screening with the three most employed standard animal seizure models, including maximal electroshock seizure (MES), subcutaneous injection-pentylenetetrazole (PTZ)-induced seizures and 3-mercaptopropionic acid (3-MP)-induced seizures in mice...
August 31, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29331765/5-6-dihydropyrimidine-1-2h-carbothioamides-synthesis-in-vitro-gaba-at-screening-anticonvulsant-activity-and-molecular-modelling-study
#4
Meeta Sahu, Nadeem Siddiqui, Vidushi Sharma, Sharad Wakode
Even after considerable advances in the field of epilepsy treatment, convulsions are inefficiently controlled by standard drug therapy. Herein, a series of pyrimidine-carbothioamide derivatives 4(a-t) was designed as anticonvulsant agents by doing some important structural modifications in well-known anticonvulsant drugs. Two classical animal models were used for the in vivo anticonvulsant screening, maximum electroshock seizure (MES) and subcutaneous pentylenetetrazole (scPTZ) models; followed by motor impairment study by rotarod method...
January 2, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29329111/severe-peri-ictal-respiratory-dysfunction-is-common-in-dravet-syndrome
#5
YuJaung Kim, Eduardo Bravo, Caitlin K Thirnbeck, Lori A Smith-Mellecker, Se Hee Kim, Brian K Gehlbach, Linda C Laux, Douglas R Nordli Jr, George B Richerson
Dravet syndrome (DS) is a severe childhood-onset epilepsy commonly due to mutations of the sodium channel gene SCN1A. DS patients have a high risk of sudden unexplained death in epilepsy (SUDEP), believed to be due to cardiac mechanisms. Here we show that DS patients have peri-ictal respiratory dysfunction. One patient who had severe and prolonged postictal hypoventilation later died of SUDEP. Mice with an Scn1aR1407X/+ loss of function mutation died after spontaneous and heat-induced seizures due to central apnea followed by progressive bradycardia...
January 11, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29329017/amiodarone-a-multi-channel-blocker-enhances-anticonvulsive-effect-of-carbamazepine-in-the-mouse-maximal-electroshock-model
#6
Monika Banach, Monika Popławska, Kinga K Borowicz-Reutt
Cardiac arrhythmia may occur in the course of epilepsy. Simultaneous therapy of the two diseases might be complicated by drug interactions since antiarrhythmic and antiepileptic agents share some molecular targets. The aim of this study was to evaluate the influence of amiodarone, an antiarrhythmic drug working as a multi-channel blocker, on the protective activity of four classical antiepileptic drugs in the maximal electroshock test in mice. Amiodarone at doses up to 75 mg/kg did not affect the electroconvulsive threshold in mice...
January 5, 2018: Epilepsy Research
https://www.readbyqxmd.com/read/29286347/anticonvulsant-activity-of-halogen-substituted-cinnamic-acid-derivatives-and-their-effects-on-glycosylation-of-ptz-induced-chronic-epilepsy-in-mice
#7
Ye Cuan, Xirui He, Yuhui Zhao, Jiajun Yang, Yajun Bai, Yin Sun, Qiang Zhang, Zefeng Zhao, Xiaoyang Wei, Xiaohui Zheng
Epilepsy is a common chronic neurological disorder disease, and there is an urgent need for the development of novel anticonvulsant drugs. In this study, the anticonvulsant activities and neurotoxicity of 12 cinnamic acid derivatives substituted by fluorine, chlorine, bromine, and trifluoromethyl groups were screened by the maximal electroshock seizure (MES) and rotarod tests (Tox). Three of the tested compounds (compounds 3, 6 and 12) showed better anticonvulsant effects and lower neurotoxicity. They showed respective median effective dose (ED50) of 47...
December 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29284373/chrysin-isolated-from-pyrus-pashia-fruit-ameliorates-convulsions-in-experimental-animals
#8
Priyanka Sharma, Amita Kumari, Ashu Gulati, Sairam Krishnamurthy, Siva Hemalatha
OBJECTIVE: The traditional use of the ethanolic extract of the fruit of Pyrus pashia (EPP) as a potential anticonvulsant was validated using experimental animal models. Furthermore, the anticonvulsant activity of isolated chrysin was investigated against experimental animal models to draw a possible therapeutic mechanism of EPP. Additionally, the safety profile of chrysin was evaluated to explore the possible therapeutic alternative in the management of epilepsy. METHOD: The anticonvulsant activity in terms of duration of onset of hind limb tonic extension and convulsion of standardized EPP was evaluated against maximal electroshock (MES) and pentylenetetrazole (PTZ) model of experimental epilepsy respectively...
December 28, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/29262297/antiallodynic-and-antihyperalgesic-activity-of-new-3-3-diphenyl-propionamides-with-anticonvulsant-activity-in-models-of-pain-in-mice
#9
Anna Rapacz, Jolanta Obniska, Paulina Koczurkiewicz, Katarzyna Wójcik-Pszczoła, Agata Siwek, Anna Gryboś, Sabina Rybka, Aleksandra Karcz, Elżbieta Pękala, Barbara Filipek
Anticonvulsant drugs are used to treat a wide range of non-epileptic conditions, including chronic pain. The aim of the present experiments was to examine analgesic activity of three new 3,3-diphenyl-propionamides, which had previously demonstrated anticonvulsant activity in the MES (maximal electroshock seizure), scPTZ (subcutaneous pentylenetetrazole) and/or 6Hz (psychomotor seizure) tests in mice. Antinociceptive activity was examined in mouse models of acute pain (the hot plate test) and tonic pain (the formalin test) in mice...
December 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29250000/social-fear-conditioning-paradigm-in-virtual-reality-social-vs-electrical-aversive-conditioning
#10
Jonas Reichenberger, Sonja Porsch, Jasmin Wittmann, Verena Zimmermann, Youssef Shiban
In a previous study we could show that social fear can be induced and extinguished using virtual reality (VR). In the present study, we aimed to investigate the belongingness effect in an operant social fear conditioning (SFC) paradigm which consisted of an acquisition and an extinction phase. Forty-three participants used a joystick to approach different virtual male agents that served as conditioned stimuli. Participants were randomly allocated to one of two experimental conditions. In the electroshock condition, the unconditioned stimulus (US) used during acquisition was an electric stimulation...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29248452/protective-effect-of-terminalia-chebula-against-seizures-seizure-induced-cognitive-impairment-and-oxidative-stress-in-experimental-models-of-seizures-in-rats
#11
Ritesh Kumar, Renu Arora, Amit Agarwal, Y K Gupta
ETHNOPHARMACOLOGICAL RELEVANCE: Teminalia chebula (TC) has been traditionally used in the Ayurvedic system of medicine primarily for gastrointestinal disorders. Its fruit extract has also been used to treat epilepsy and other CNS disorders. AIM OF THE STUDY: To evaluate the effect of hydroalcoholic fruit extract of Terminalia chebula (HETC) on experimental models of seizures, seizure-induced cognitive impairment and oxidative stress in rats. MATERIALS AND METHODS: In vitro antioxidant activity of HETC was evaluated by using ABTS, NO and DPPH radical scavenging assay...
December 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29227797/anticonvulsant-effects-of-acetaminophen-in-mice-comparison-with-the-effects-of-nonsteroidal-anti-inflammatory-drugs
#12
Katsuya Suemaru, Misato Yoshikawa, Akihiro Tanaka, Hiroaki Araki, Hiroaki Aso, Masahiko Watanabe
OBJECTIVE: The appropriate use of analgesic drugs based on their degree of analgesia and adverse effects is important for pain management. Although it has been reported that AM404, a metabolite of acetaminophen, has anticonvulsant effects in several animal seizure models, little is known about the relation between acetaminophen and seizures. We therefore investigated the effects of acetaminophen on seizure susceptibility in several mouse seizure and epilepsy models and compared the effects with those of nonsteroidal anti-inflammatory drugs (NSAIDs)...
December 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29201080/anticonvulsant-effects-of-new-1-4-dihydropyridinederivatives-containing-imidazolyl-moiety-against-seizures-induced-by-pentylenetetrazole-and-maximal-electroshock-in-mice
#13
Yasaman Rasouli, Asghar Davood, Armin Alaee, Golnoush Dehqani, Hamed Shafaroudi, Mahboubeh Lotfinia, Mohsen Amini, Abbas Shafiee
Epilepsy is a chronic disorder of the brain affecting around 50 million people in the world. Up to 30% of epileptic patients do not respond to available drugs and medical therapies. In this paper, anticonvulsant screening of 10 synthesized new derivatives of 1, 4-dihydropyridine-3, 5-dicarboxamides was performed. Anticonvulsant activity was evaluated by intravenous and intraperitoneal pentylenetetrazole and maximal electroshock induced seizures tests. Nifedipine was used as reference drug. Our pharmacological results revealing the compounds 2, 4, 5, and 6 can be effective in both absence and grandmal seizures in human...
2017: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/29191768/interactions-of-aliskiren-a-direct-renin-inhibitor-with-antiepileptic-drugs-in-the-test-of-maximal-electroshock-in-mice
#14
Krzysztof Łukawski, Grzegorz Raszewski, Stanisław J Czuczwar
Experimental studies showed that certain angiotensin-converting enzyme inhibitors and angiotensin AT1 receptor antagonists can decrease seizure severity in rodents. Additionally, some of these blockers of the renin-angiotensin system have been documented to enhance the anticonvulsant activity of antiepileptic drugs against maximal electroshock-induced seizures. The aim of the current study was to investigate the effect of aliskiren, a direct renin inhibitor and a novel antihypertensive drug, on the protective action of numerous antiepileptic drugs (carbamazepine, valproate, clonazepam, phenobarbital, oxcarbazepine, lamotrigine, topiramate and pregabalin) in the test of maximal electroshock in mice...
November 27, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29183747/anticonvulsant-effect-of-the-hydroethanolic-leaf-extract-of-psydrax-subcordata-dc-bridson-in-murine-models
#15
Samuel Daanaa, Wonder Kofi Mensah Abotsi, Eric Boakye-Gyasi, Eric Woode
ETHNOPHARMACOLOGICAL RELEVANCE: Psydrax subcordata (DC.) Bridson is a tropical medicinal plant used traditionally for the management of epilepsy. However, there is little scientific evidence to support its use. AIM OF STUDY: The current study investigated the anticonvulsant properties of the hydroethanolic leaf extract of Psydrax subcordata (PSE) in animal models. MATERIALS AND METHODS: The anticonvulsant effects were evaluated in mouse models of acute seizures (pentylenetetrazole-, picrotoxin-, 4-aminopyridine-, strychnine- and maximal electroshock-induced seizure tests) and status epilepticus (Lithium/pilocarpine-induced SE)...
November 25, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29157166/sub-chronic-boldine-treatment-exerts-anticonvulsant-effects-in-mice
#16
Leila Moezi, Siranoush Yahosseini, Akram Jamshidzadeh, Mona Dastgheib, Fateme Pirsalami
OBJECTIVES: Boldine is an aporphine alkaloid which is best known for its antioxidant, anti-inflammatory and cytoprotective characteristics. It seems that all these activities are related to boldine ability to scavenge reactive free radicals. As indicated by several pieces of evidence, free radicals generation are involved in initiation and propagation of epilepsy. METHODS: In this study, we investigated the sub-chronic effects of boldine on intraperitoneal and intravenous pentylenetetrazole (PTZ) models and electroshock-induced seizure in mice...
November 20, 2017: Neurological Research
https://www.readbyqxmd.com/read/29128797/sotalol-enhances-the-anticonvulsant-action-of-valproate-and-diphenylhydantoin-in-the-mouse-maximal-electroshock-model
#17
Monika Banach, Monika Popławska, Kinga K Borowicz-Reutt
BACKGROUND: Sotalol as a drug blocking β-receptors and potassium KCNH2 channels may interact with different substances that affect seizures. Herein, we present interactions between sotalol and four conventional antiepileptic drugs: carbamazepine, valproate, phenytoin and phenobarbital. METHODS: Effects of sotalol and antiepileptics alone on seizures were determined in the electroconvulsive threshold test, while interactions between sotalol and antiepileptic drugs were estimated in the maximal electroshock test in mice...
May 11, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29122492/d-leucine-evaluation-in-an-epilepsy-model
#18
Kylie Holden, Adam L Hartman
BACKGROUND: Current medicines do not provide sufficient seizure control for nearly one-third of patients with epilepsy. New options are needed to address this treatment gap. We recently found that the atypical amino acid d-leucine protected against acutely-induced seizures in mice, but its effect in chronic seizures has not been explored. We hypothesized that d-leucine would protect against spontaneous recurrent seizures. We also investigated whether mice lacking a previously-described d-leucine receptor (Tas1R2/R3) would be protected against acutely-induced seizures...
November 7, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29111525/crystallographic-studies-of-cinnamamide-derivatives-as-a-means-of-searching-for-anticonvulsant-activity
#19
Ewa Żesławska, Wojciech Nitek, Henryk Marona, Agnieszka Gunia-Krzyżak
A cinnamamide (3-phenylprop-2-enamide) core is present in many pharmacologically active compounds. We report three new crystal structures of N-substituted cinnamamide derivatives which were screened for anticonvulsant activity, namely (R,S)-(2E)-N-(2-hydroxypropyl)-3-phenylprop-2-enamide, C12H15NO2, (1), (R,S)-(2E)-N-(1-hydroxybutan-2-yl)-3-phenylprop-2-enamide, C13H17NO2, (2), and (2E)-1-(4-hydroxypiperidin-1-yl)-3-phenylprop-2-en-1-one, C14H17NO2, (3). Compounds (1) and (2) crystallize in the Pbca space group with one molecule in the asymmetric unit, whereas compound (3) crystallizes in the P21/c space group with two molecules in the asymmetric unit...
November 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28991068/regulation-of-electroconvulsive-therapy-a-systematic-review-of-us-state-laws
#20
Robin Livingston, Chester Wu, Kathy Mu, M Justin Coffey
OBJECTIVES: The goal of this study was to systematically review current US state laws on electroconvulsive therapy (ECT) in order to provide a comprehensive resource to educate practitioners, potential patients, and lawmakers. METHODS: Individual state legislative Web sites were searched by 2 independent authors using the following search terms: "electroconvulsive therapy," "convulsive therapy," "electroconvulsant therapy," "electroshock therapy," and "shock therapy" from March 2017 to May 2017...
October 3, 2017: Journal of ECT
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