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https://www.readbyqxmd.com/read/27875747/new-model-of-pharmacoresistant-seizures-induced-by-3-mercaptopropionic-acid-in-mice
#1
Andrea Enrique, Sofía Goicoechea, Rocío Castaño, Facundo Taborda, Luisa Rocha, Sandra Orozco, Elena Girardi, Luis Bruno Blanch
About 30% of the patients with epilepsy do not respond to clinically established anticonvulsants, despite having effective concentrations of the antiepileptic drug in plasma. Therefore, new preclinical models of epilepsy are needed to identify more efficacious treatments. We describe here a new drug-resistant seizure model in mice to be used at the early stages of pre-clinical trials. This model consists in inducing daily generalized seizures for 23 consecutive days by administration of 3-mercaptopropionic acid (MP)...
October 27, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27854111/the-risk-of-hypotension-and-seizures-in-patients-receiving-prophylactic-anti-epileptic-drugs-for-supratentorial-craniotomy
#2
Julius Höhne, Karl M Schebesch, Christian Ott, Alexander Brawanski, Max Lange
BACKGROUND: Perioperative seizure prophylaxis with antiepileptic drugs (AED) has been advocated in patients undergoing supratentorial craniotomy. The practice remains controversial. The reasoning presupposes that the possibility of an adverse drug reaction from the AED is lower than the probability of harm from a seizure. Even short periods of hypotension during the operation can lead to acute kidney and myocardial injury. We retrospectively evaluated cardiovascular effects and tolerability of Levetiracetam (LEV) alone, LEV and Lacosamid (LCM) as compared to Phenytoin (PHT)...
November 17, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27853355/anticonvulsant-effects-of-isomeric-nonimidazole-histamine-h3-receptor-antagonists
#3
Bassem Sadek, Ali Saad, Johannes Stephan Schwed, Lilia Weizel, Miriam Walter, Holger Stark
Phenytoin (PHT), valproic acid, and modern antiepileptic drugs (AEDs), eg, remacemide, loreclezole, and safinamide, are only effective within a maximum of 70%-80% of epileptic patients, and in many cases the clinical use of AEDs is restricted by their side effects. Therefore, a continuous need remains to discover innovative chemical entities for the development of active and safer AEDs. Ligands targeting central histamine H3 receptors (H3Rs) for epilepsy might be a promising therapeutic approach. To determine the potential of H3Rs ligands as new AEDs, we recently reported that no anticonvulsant effects were observed for the (S)-2-(4-(3-(piperidin-1-yl)propoxy)benzylamino)propanamide (1)...
2016: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/27843822/impact-of-antiepileptic-drugs-on-bone-health-need-for-monitoring-treatment-and-prevention-strategies
#4
REVIEW
Ekta Arora, Harmanjit Singh, Yogendra Kumar Gupta
Epilepsy is the most common neurological disorder affecting approximately 50 million people worldwide. In India, overall prevalence of epilepsy is reported to be 5.59/1000 population. Antiepileptic drugs (AEDs) constitute the main-stay of treatment with a large number of AEDs available in the market. High incidence of adverse effects is a major limitation with AEDs. One of the major concerns is significant metabolic effects on the bone. However, little attention has been paid to this issue because most of the bone effects remain subclinical for a long time and may take years to manifest clinically...
April 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/27843704/association-between-antiepileptic-drugs-and-hepatocellular-carcinoma-in-patients-with-epilepsy-a-population-based-case-control-study
#5
Dong-Zong Hung, Cheng-Li Lin, Yi-Wen Li, Yen-Ning Lin, Ying-Ray Lee, Charles-C N Wang, Jih-Jung Chen, Yun-Ping Lim
BACKGROUND: This study explored whether antiepileptic drugs (AEDs) use increases the risk of hepatocellular carcinoma (HCC). METHODS: We conducted a case-control study using data from the National Health Insurance system of Taiwan. The case group comprised 1,454 epilepsy patients with newly diagnosed HCC, and the control group comprised 1,448 epilepsy patients without HCC. Both groups had similar distributions of sex and age, and follow-up duration. Possible associations with the AEDs in Taiwan were examined...
November 2016: Brain and Behavior
https://www.readbyqxmd.com/read/27821519/hyperhomocysteinaemia-in-children-receiving-phenytoin-and-carbamazepine-monotherapy-a-cross-sectional-observational-study
#6
Saravanan Chandrasekaran, Sooraj Patil, Renu Suthar, Savita Verma Attri, Jitendra Kumar Sahu, Naveen Sankhyan, Mini Tageja, Pratibha Singhi
OBJECTIVE: Long-term therapy with phenytoin and carbamazepine is known to cause hyperhomocysteinaemia. We evaluated the prevalence of hyperhomocysteinaemia in North Indian children receiving phenytoin or carbamazepine monotherapy for >6 months duration and the effect of folic acid supplementation on plasma homocysteine. METHODS: In this cross-sectional observational study we enrolled consecutive children aged 2-12 years with epilepsy who had received phenytoin or carbamazepine monotherapy for >6 months...
November 7, 2016: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/27819746/monotherapy-treatment-of-epilepsy-in-pregnancy-congenital-malformation-outcomes-in-the-child
#7
REVIEW
Jennifer Weston, Rebecca Bromley, Cerian F Jackson, Naghme Adab, Jill Clayton-Smith, Janette Greenhalgh, Juliet Hounsome, Andrew J McKay, Catrin Tudur Smith, Anthony G Marson
BACKGROUND: There is evidence that certain antiepileptic drugs (AEDs) are teratogenic and are associated with an increased risk of congenital malformation. The majority of women with epilepsy continue taking AEDs throughout pregnancy; therefore it is important that comprehensive information on the potential risks associated with AED treatment is available. OBJECTIVES: To assess the effects of prenatal exposure to AEDs on the prevalence of congenital malformations in the child...
November 7, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27777862/availability-and-cost-of-major-and-first-line-antiepileptic-drugs-a-comprehensive-evaluation-in-the-capital-of-madagascar
#8
Jeremy Jost, Adeline Raharivelo, Voa Ratsimbazafy, Mandy Nizard, Emilie Auditeau, Charles R Newton, Pierre-Marie Preux
BACKGROUND: The prevalence of epilepsy is high in Madagascar (23.5/1000), as is the treatment gap (estimated at 92 %). The health system of the country is underfunded; some AEDs are used, and the national drug policy does not encourage price regulation or the administration of generic agents. We conducted a cross-sectional study to assess the availability and cost of solid oral AED formulations in Antananarivo, capital of Madagascar. Data were gathered from all officially registered pharmacies (according to the drug agency list, updated in 2015) by means of telephone interviews lasting no more than 10 min and conducted by a native Malagasy speaker...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27749771/comparative-persistence-of-antiepileptic-drugs-in-patients-with-epilepsy-a-strobe-compliant-retrospective-cohort-study
#9
Edward Chia-Cheng Lai, Cheng-Yang Hsieh, Chien-Chou Su, Yea-Huei Kao Yang, Chin-Wei Huang, Swu-Jane Lin, Soko Setoguchi
We compared persistence of antiepileptic drugs (AEDs) including carbamazepine, oxcarbazepine, gabapentin, lamotrigine, topiramate, valproic acid, and phenytoin in an Asian population with epilepsy.A retrospective cohort study was conducted by analyzing Taiwan's National Health Insurance Research Database (NHIRD). Adult epilepsy patients newly prescribed with AEDs between 2005 and 2009 were included. The primary outcome was persistence, defined as the treatment duration from the date of AED initiation to the date of AED discontinuation, switching, hospitalization due to seizure or disenrollment from databases, whichever came first...
August 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27663280/pharmacokinetic-pharmacodynamic-influence-of-n-palmitoylethanolamine-arachidonyl-2-chloroethylamide-and-win-55-212-2-on-the-anticonvulsant-activity-of-antiepileptic-drugs-against-audiogenic-seizures-in-dba-2-mice
#10
Rita Citraro, Emilio Russo, Antonio Leo, Roberto Russo, Carmen Avagliano, Michele Navarra, Antonio Calignano, Giovambattista De Sarro
We evaluated the effects of ACEA (selective cannabinoid (CB)1 receptor agonist), WIN 55,212-2 mesylate (WIN; non-selective CB1 and CB2 receptor agonist) and N-palmitoylethanolamine (PEA; an endogenous fatty acid of ethanolamide) in DBA/2 mice, a genetic model of reflex audiogenic epilepsy. PEA, ACEA or WIN intraperitoneal (i.p.) administration decreased the severity of tonic-clonic seizures. We also studied the effects of PEA, WIN or ACEA after co-administration with NIDA-41020 (CB1 receptor antagonist) or GW6471 (PPAR-α antagonist) and compared the effects of WIN, ACEA and PEA in order to clarify their mechanisms of action...
September 20, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27644408/proconvulsant-effects-of-the-ketogenic-diet-in-electroshock-induced-seizures-in-mice
#11
Iwona Zarnowska, Jarogniew J Luszczki, Tomasz Zarnowski, Piotr Wlaz, Stanislaw J Czuczwar, Maciej Gasior
Among non-pharmacological treatments, the ketogenic diet (KD) has the strongest demonstrated evidence of clinical success in drug resistant epilepsy. In an attempt to model the anticonvulsant effects of the KD pre-clinically, the present study assessed the effects of the KD against electroshock-induced convulsions in mice. After confirming that exposure to the KD for 2 weeks resulted in stable ketosis and hypoglycemia, mice were exposed to electroshocks of various intensities to establish general seizure susceptibility...
September 20, 2016: Metabolic Brain Disease
https://www.readbyqxmd.com/read/27629998/myoclonus-and-seizures-in-progressive-myoclonus-epilepsies-pharmacology-and-therapeutic-trials
#12
Roberto Michelucci, Elena Pasini, Patrizia Riguzzi, Eva Andermann, Reetta Kälviäinen, Pierre Genton
Generalized motor seizures, usually tonic-clonic, tonic-vibratory, myoclonic or clonic, and stimulus-sensitive/action myoclonus are typical features of progressive myoclonus epilepsies (PMEs). Despite the introduction of many anticonvulsants, the treatment of these symptoms, particularly myoclonus, remains challenging, due to the incomplete and often transitory effects of most drugs. Moreover, treatment is only symptomatic, since therapy targeting the underlying aetiology for these genetic conditions is in its infancy...
September 1, 2016: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/27602091/association-between-abcb1-genetic-polymorphism-and-the-effect-on-epilepsy-following-phenytoin-treatment
#13
Fei Sun, Bo-Qiang Cao, Bo Wang, Shi-Qiang Wu, De-Hua Jiang
The aim of the study was to analyze the effect of ABCB1 genetic polymorphisms on the efficacy of phenytoin (PHT) treatment in epilepsy patients. In total, 200 epilepsy patients who were administered PHT were divided into the responsive and pharmaco-resistance groups depending on the clinical data of PHT treatment in epilepsy patients. The serum concentration of PHT was detected by high-performance liquid chromatography (HPLC). ABCB1 polymorphisms were analyzed by the polymerase chain reaction restriction-fragment length polymorphism method...
September 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27596103/current-treatment-options-for-early-onset-pediatric-epileptic-encephalopathies
#14
REVIEW
Rolla Shbarou
The management of early-onset, genetically determined epilepsies is often challenging. First-line anti-epileptic drugs (AEDs) often include phenobarbital, phenytoin, oxcarbazepine, carbamazepine, clonazepam, levetiracetam, and valproic acid. Combinations of medications are used in these patients with often intractable seizures, and they include topiramate, clobazam, felbamate, lacosamide, lamotrigine, rufinamide, vigabatrin, ACTH, oral steroids, and the ketogenic diet. Vagus nerve stimulator therapy offers some relief in selected patients...
October 2016: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/27590225/toxicity-of-antiepileptic-drugs-to-mitochondria
#15
Josef Finsterer
Some of the side and beneficial effects of antiepileptic drugs (AEDs) are mediated via the influence on mitochondria. This is of particular importance in patients requiring AED treatment for mitochondrial epilepsy. AED treatment in patients with mitochondrial disorders should rely on the known influences of AEDs on these organelles. AEDs may influence various mitochondrial functions or structures in a beneficial or detrimental way. There are AEDs in which the toxic effect outweighs the beneficial effect, such as valproic acid (VPA), carbamazepine (CBZ), phenytoin (PHT), or phenobarbital (PB)...
September 3, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27589412/influence-of-antiepileptic-drugs-on-serum-lipid-levels-in-adult-epilepsy-patients
#16
Yoshiaki Yamamoto, Kiyohito Terada, Yukitoshi Takahashi, Katsumi Imai, Yoshiyuki Kagawa, Yushi Inoue
The aim of this study was to evaluate the influence of antiepileptic drugs (AEDs) on lipid levels in adult epilepsy patients. We retrospectively reviewed blood data of 5053 patients with epilepsy (aged 20-94 years) and divided them into 3 groups: non AED group (without AED treatment), non-inducer group (using non-inducer AEDs), and inducer group (taking inducer AEDs; phenytoin (PHT), phenobarbital (PB), and carbamazepine (CBZ)). As a marker of dyslipidemia, the level of non-high-density lipoprotein cholesterol (non-HDL-C) was calculated by subtracting HDL-cholesterol from total cholesterol...
August 24, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27583857/comparative-persistence-of-antiepileptic-drugs-in-patients-with-epilepsy-a-strobe-compliant-retrospective-cohort-study
#17
Edward Chia-Cheng Lai, Cheng-Yang Hsieh, Chien-Chou Su, Yea-Huei Kao Yang, Chin-Wei Huang, Swu-Jane Lin, Soko Setoguchi
We compared persistence of antiepileptic drugs (AEDs) including carbamazepine, oxcarbazepine, gabapentin, lamotrigine, topiramate, valproic acid, and phenytoin in an Asian population with epilepsy.A retrospective cohort study was conducted by analyzing Taiwan's National Health Insurance Research Database (NHIRD). Adult epilepsy patients newly prescribed with AEDs between 2005 and 2009 were included. The primary outcome was persistence, defined as the treatment duration from the date of AED initiation to the date of AED discontinuation, switching, hospitalization due to seizure or disenrollment from databases, whichever came first...
August 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27505294/fit-for-purpose-application-of-currently-existing-animal-models-in-the-discovery-of-novel-epilepsy-therapies
#18
REVIEW
Wolfgang Löscher
Animal seizure and epilepsy models continue to play an important role in the early discovery of new therapies for the symptomatic treatment of epilepsy. Since 1937, with the discovery of phenytoin, almost all anti-seizure drugs (ASDs) have been identified by their effects in animal models, and millions of patients world-wide have benefited from the successful translation of animal data into the clinic. However, several unmet clinical needs remain, including resistance to ASDs in about 30% of patients with epilepsy, adverse effects of ASDs that can reduce quality of life, and the lack of treatments that can prevent development of epilepsy in patients at risk following brain injury...
October 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27490534/the-impact-of-anti-epileptic-drugs-on-growth-and-bone-metabolism
#19
REVIEW
Hueng-Chuen Fan, Herng-Shen Lee, Kai-Ping Chang, Yi-Yen Lee, Hsin-Chuan Lai, Pi-Lien Hung, Hsiu-Fen Lee, Ching-Shiang Chi
Epilepsy is a common neurological disorder worldwide and anti-epileptic drugs (AEDs) are always the first choice for treatment. However, more than 50% of patients with epilepsy who take AEDs have reported bone abnormalities. Cytochrome P450 (CYP450) isoenzymes are induced by AEDs, especially the classical AEDs, such as benzodiazepines (BZDs), carbamazepine (CBZ), phenytoin (PT), phenobarbital (PB), and valproic acid (VPA). The induction of CYP450 isoenzymes may cause vitamin D deficiency, hypocalcemia, increased fracture risks, and altered bone turnover, leading to impaired bone mineral density (BMD)...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27466022/acute-cognitive-impact-of-antiseizure-drugs-in-naive-rodents-and-corneal-kindled-mice
#20
Melissa L Barker-Haliski, Fabiola Vanegas, Matthew J Mau, Tristan K Underwood, H Steve White
OBJECTIVE: Some antiseizure drugs (ASDs) are associated with cognitive liability in patients with epilepsy, thus ASDs without this risk would be preferred. Little comparative pharmacology exists with ASDs in preclinical models of cognition. Few pharmacologic studies exist on the acute effects in rodents with chronic seizures. Predicting risk for cognitive impact with preclinical models may supply valuable ASD differentiation data. METHODS: ASDs (phenytoin [PHT]; carbamazepine [CBZ]; valproic acid [VPA]; lamotrigine [LTG]; phenobarbital [PB]; tiagabine [TGB]; retigabine [RTG]; topiramate [TPM]; and levetiracetam [LEV]) were administered equivalent to maximal electroshock median effective dose ([ED50]; mice, rats), or median dose necessary to elicit minimal motor impairment (median toxic dose [TD50]; rats)...
September 2016: Epilepsia
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