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Armstrong OJ, Neal ES, Vidovic D, Xu W, Borges K. Transient anticonvulsant effects of time-restricted feeding in the 6-Hz mouse model. Epilepsy Behav 2024; 151:109618. [PMID: 38184948 DOI: 10.1016/j.yebeh.2023.109618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/23/2023] [Accepted: 12/27/2023] [Indexed: 01/09/2024]
Abstract
INTRODUCTION Intermittent fasting enhances neural bioenergetics, is neuroprotective, and elicits antioxidant effects in various animal models. There are conflicting findings on seizure protection, where intermittent fasting regimens often cause severe weight loss resembling starvation which is unsustainable long-term. Therefore, we tested whether a less intensive intermittent fasting regimen such as time-restricted feeding (TRF) may confer seizure protection. METHODS Male CD1 mice were assigned to either ad libitum-fed control, continuous 8 h TRF, or 8 h TRF with weekend ad libitum food access (2:5 TRF) for one month. Body weight, food intake, and blood glucose levels were measured. Seizure thresholds were determined at various time points using 6-Hz and maximal electroshock seizure threshold (MEST) tests. Protein levels and mRNA expression of genes, enzyme activity related to glucose metabolism, as well as mitochondrial dynamics were assessed in the cortex and hippocampus. Markers of antioxidant defence were evaluated in the plasma, cortex, and liver. RESULTS Body weight gain was similar in the ad libitum-fed and TRF mouse groups. In both TRF regimens, blood glucose levels did not change between the fed and fasted state and were higher during fasting than in the ad libitum-fed groups. Mice in the TRF group had increased seizure thresholds in the 6-Hz test on day 15 and on day 19 in a second cohort of 2:5 TRF mice, but similar seizure thresholds at other time points compared to ad libitum-fed mice. Continuous TRF did not alter MEST seizure thresholds on day 28. Mice in the TRF group showed increased maximal activity of pyruvate dehydrogenase in the cortex, which was accompanied by increased protein levels of mitochondrial pyruvate carrier 1 in the cortex and hippocampus. There were no other major changes in protein or mRNA levels associated with energy metabolism and mitochondrial dynamics in the brain, nor markers of antioxidant defence in the brain, liver, or plasma. CONCLUSIONS Both continuous and 2:5 TRF regimens transiently increased seizure thresholds in the 6-Hz model at around 2 weeks, which coincided with stability of blood glucose levels during the fed and fasted periods. Our findings suggest that the lack of prolonged anticonvulsant effects in the acute electrical seizure models employed may be attributed to only modest metabolic and antioxidant adaptations found in the brain and liver. Our findings underscore the potential therapeutic value of TRF in managing seizure-related conditions.
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Affiliation(s)
- Oliver J Armstrong
- School of Biomedical Sciences, Skerman Building 65, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Elliott S Neal
- School of Biomedical Sciences, Skerman Building 65, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Diana Vidovic
- School of Biomedical Sciences, Medical Building 181, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Weizhi Xu
- School of Biomedical Sciences, Skerman Building 65, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Karin Borges
- School of Biomedical Sciences, Skerman Building 65, The University of Queensland, St. Lucia, QLD 4072, Australia.
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Schamiloglu S, Wu H, Zhou M, Kwan AC, Bender KJ. Dynamic Foraging Behavior Performance Is Not Affected by Scn2a Haploinsufficiency. eNeuro 2023; 10:ENEURO.0367-23.2023. [PMID: 38151324 PMCID: PMC10755640 DOI: 10.1523/eneuro.0367-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/23/2023] [Accepted: 11/14/2023] [Indexed: 12/29/2023] Open
Abstract
Dysfunction in the gene SCN2A, which encodes the voltage-gated sodium channel Nav1.2, is strongly associated with neurodevelopmental disorders including autism spectrum disorder and intellectual disability (ASD/ID). This dysfunction typically manifests in these disorders as a haploinsufficiency, where loss of one copy of a gene cannot be compensated for by the other allele. Scn2a haploinsufficiency affects a range of cells and circuits across the brain, including associative neocortical circuits that are important for cognitive flexibility and decision-making behaviors. Here, we tested whether Scn2a haploinsufficiency has any effect on a dynamic foraging task that engages such circuits. Scn2a +/- mice and wild-type (WT) littermates were trained on a choice behavior where the probability of reward between two options varied dynamically across trials and where the location of the high reward underwent uncued reversals. Despite impairments in Scn2a-related neuronal excitability, we found that both male and female Scn2a +/- mice performed these tasks as well as wild-type littermates, with no behavioral difference across genotypes in learning or performance parameters. Varying the number of trials between reversals or probabilities of receiving reward did not result in an observable behavioral difference, either. These data suggest that, despite heterozygous loss of Scn2a, mice can perform relatively complex foraging tasks that make use of higher-order neuronal circuits.
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Affiliation(s)
- Selin Schamiloglu
- Neuroscience Graduate Program, University of California, San Francisco, CA 94158
- Center for Integrative Neuroscience, Department of Neurology, University of California, San Francisco, CA 94158
| | - Hao Wu
- Interdepartmental Neuroscience Program, Yale University School of Medicine, New Haven, CT 06511
| | - Mingkang Zhou
- Neuroscience Graduate Program, University of California, San Francisco, CA 94158
- Center for Integrative Neuroscience, Department of Neurology, University of California, San Francisco, CA 94158
| | - Alex C Kwan
- Interdepartmental Neuroscience Program, Yale University School of Medicine, New Haven, CT 06511
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
| | - Kevin J Bender
- Center for Integrative Neuroscience, Department of Neurology, University of California, San Francisco, CA 94158
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Marinelli I, Walker JJ, Seneviratne U, D’Souza W, Cook MJ, Anderson C, Bagshaw AP, Lightman SL, Woldman W, Terry JR. Circadian distribution of epileptiform discharges in epilepsy: Candidate mechanisms of variability. PLoS Comput Biol 2023; 19:e1010508. [PMID: 37797040 PMCID: PMC10581478 DOI: 10.1371/journal.pcbi.1010508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/17/2023] [Accepted: 09/10/2023] [Indexed: 10/07/2023] Open
Abstract
Epilepsy is a serious neurological disorder characterised by a tendency to have recurrent, spontaneous, seizures. Classically, seizures are assumed to occur at random. However, recent research has uncovered underlying rhythms both in seizures and in key signatures of epilepsy-so-called interictal epileptiform activity-with timescales that vary from hours and days through to months. Understanding the physiological mechanisms that determine these rhythmic patterns of epileptiform discharges remains an open question. Many people with epilepsy identify precipitants of their seizures, the most common of which include stress, sleep deprivation and fatigue. To quantify the impact of these physiological factors, we analysed 24-hour EEG recordings from a cohort of 107 people with idiopathic generalized epilepsy. We found two subgroups with distinct distributions of epileptiform discharges: one with highest incidence during sleep and the other during day-time. We interrogated these data using a mathematical model that describes the transitions between background and epileptiform activity in large-scale brain networks. This model was extended to include a time-dependent forcing term, where the excitability of nodes within the network could be modulated by other factors. We calibrated this forcing term using independently-collected human cortisol (the primary stress-responsive hormone characterised by circadian and ultradian patterns of secretion) data and sleep-staged EEG from healthy human participants. We found that either the dynamics of cortisol or sleep stage transition, or a combination of both, could explain most of the observed distributions of epileptiform discharges. Our findings provide conceptual evidence for the existence of underlying physiological drivers of rhythms of epileptiform discharges. These findings should motivate future research to explore these mechanisms in carefully designed experiments using animal models or people with epilepsy.
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Affiliation(s)
- Isabella Marinelli
- Centre for Systems Modelling and Quantitative Biomedicine, University of Birmingham, Birmingham, United Kingdom
| | - Jamie J. Walker
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, United Kingdom
| | - Udaya Seneviratne
- Department of Neurosciences, Monash Health, Clayton, Australia
- Department of Neuroscience, St. Vincent’s Hospital, University of Melbourne, Melbourne, Australia
| | - Wendyl D’Souza
- Department of Medicine, St. Vincent’s Hospital, University of Melbourne, Melbourne, Australia
| | - Mark J. Cook
- Department of Neuroscience, St. Vincent’s Hospital, University of Melbourne, Melbourne, Australia
| | - Clare Anderson
- School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Clayton, Australia
- Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
| | - Andrew P. Bagshaw
- Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
| | - Stafford L. Lightman
- Bristol Medical School: Translational Health Sciences, University of Bristol, Bristol, United Kingdom
| | - Wessel Woldman
- Centre for Systems Modelling and Quantitative Biomedicine, University of Birmingham, Birmingham, United Kingdom
| | - John R. Terry
- Centre for Systems Modelling and Quantitative Biomedicine, University of Birmingham, Birmingham, United Kingdom
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Bartolini E, Ferrari AR, Fiori S, Della Vecchia S. Glycaemic Imbalances in Seizures and Epilepsy of Paediatric Age: A Literature Review. J Clin Med 2023; 12:jcm12072580. [PMID: 37048663 PMCID: PMC10095009 DOI: 10.3390/jcm12072580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/20/2023] [Accepted: 03/26/2023] [Indexed: 04/01/2023] Open
Abstract
Cerebral excitability and systemic metabolic balance are closely interconnected. Energy supply to neurons depends critically on glucose, whose fluctuations can promote immediate hyperexcitability resulting in acute symptomatic seizures. On the other hand, chronic disorders of sugar metabolism (e.g., diabetes mellitus) are often associated with long-term epilepsy. In this paper, we aim to review the existing knowledge on the association between acute and chronic glycaemic imbalances (hyper- and hypoglycaemia) with seizures and epilepsy, especially in the developing brain, focusing on clinical and instrumental features in order to optimize the care of children and adolescents and prevent the development of chronic neurological conditions in young patients.
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Affiliation(s)
- Emanuele Bartolini
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, 56128 Pisa, Italy (A.R.F.)
- Tuscany PhD Programme in Neurosciences, 50139 Florence, Italy
| | - Anna Rita Ferrari
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, 56128 Pisa, Italy (A.R.F.)
| | - Simona Fiori
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, 56128 Pisa, Italy (A.R.F.)
- Department of Clinical and Experimental Medicine, University of Pisa, 56128 Pisa, Italy
| | - Stefania Della Vecchia
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, 56128 Pisa, Italy (A.R.F.)
- Department of Molecular Medicine and Neurogenetics, IRCCS Stella Maris Foundation, 56128 Pisa, Italy
- Correspondence: ; Tel.: +39-050-886-332
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Dinç Y, Demir AB, Özkaya G, Bakar M. Specificity and sensitivity of the SeLECT score in predicting late seizures in patients undergoing intravenous thrombolytic treatment and the effect of diabetes mellitus and leukoaraiosis. ARQUIVOS DE NEURO-PSIQUIATRIA 2023; 81:217-224. [PMID: 37059430 PMCID: PMC10104754 DOI: 10.1055/s-0043-1767764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
BACKGROUND Seizures after stroke can negatively affect the prognosis of ischemic stroke and cause a decrease in quality of life. The efficacy of intravenous (IV) recombinant tissue plasminogen activator (rt-PA) treatment in acute ischemic stroke has been demonstrated in many studies, and IV rt-PA treatment has been increasingly used around the world. The SeLECT score is a useful score for the prediction of late seizures after stroke and includes the severity of stroke (Se), large artery atherosclerosis (L), early seizure (E), cortical involvement (C), and the territory of the middle cerebral artery (T). However, the specificity and sensitivity of the SeLECT score have not been studied in acute ischemic stroke patients that received IV rt-PA treatment. OBJECTIVE In the present study, we aimed to validate and develop the SeLECT score in acute ischemic stroke patients receiving IV rt-PA treatment. METHODS The present study included 157 patients who received IV thrombolytic treatment in our third-stage hospital. The 1-year seizure rates of the patients were detected. SeLECT scores were calculated. RESULTS In our study, we found that the SeLECT score had low sensitivity but high specificity for predicting the likelihood of late seizure after stroke in patients administered IV rt-PA therapy. In addition to the SeLECT score, we found that the specificity and sensitivity were higher when we evaluated diabetes mellitus (DM) and leukoaraiosis. CONCLUSION We found that DM was an independent risk factor for late seizures after stroke in a patient group receiving thrombolytic therapy, and late seizures after stroke were less frequent in patients with leukoaraiosis.
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Affiliation(s)
- Yasemin Dinç
- Uludağ University, Faculty of Medicine, Department of Neurology, Bursa, Türkiye
| | - Aylin Bican Demir
- Uludağ University, Faculty of Medicine, Department of Neurology, Bursa, Türkiye
| | - Güven Özkaya
- Bursa Uludag University, Faculty of Medicine, Department of Biostatistics, Bursa, Türkiye
| | - Mustafa Bakar
- Uludağ University, Faculty of Medicine, Department of Neurology, Bursa, Türkiye
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Ramos-Riera KP, Pérez-Severiano F, López-Meraz ML. Oxidative stress: a common imbalance in diabetes and epilepsy. Metab Brain Dis 2023; 38:767-782. [PMID: 36598703 DOI: 10.1007/s11011-022-01154-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/23/2022] [Indexed: 01/05/2023]
Abstract
The brain requires a large amount of energy. Its function can be altered when energy demand exceeds supply or during metabolic disturbances such as diabetes mellitus. Diabetes, a chronic disease with a high incidence worldwide, is characterized by high glucose levels (hyperglycemia); however, hypoglycemic states may also occur due to insulin treatment or poor control of the disease. These alterations in glucose levels affect the brain and could cause epileptic seizures and status epilepticus. In addition, it is known that oxidative stress states emerge as diabetes progresses, contributing to the development of diseases secondary to diabetes, including retinopathy, nephropathy, cardiovascular alterations, and alterations in the central nervous system, such as epileptic seizures. Seizures are a complex of transient signs and symptoms resulting from abnormal, simultaneous, and excessive activity of a population of neurons, and they can be both a cause and a consequence of oxidative stress. This review aims to outline studies linking diabetes mellitus and seizures to oxidative stress, a condition that may be relevant to the development of severe seizures in diabetes mellitus patients.
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Affiliation(s)
- Karen Paola Ramos-Riera
- Doctorado de Investigaciones Cerebrales, Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Dr. Luis Castelazo Ayala s/n, Industrial Animas, 91190, Xalapa, Veracruz, México
| | - Francisca Pérez-Severiano
- Laboratorio de Neurofarmacología Molecular y Nanotecnología, Instituto Nacional de Neurología y Neurocirugía, "Manuel Velasco Suarez," Insurgentes Sur 3877, 14269, La Fama, CDMX, México
| | - María Leonor López-Meraz
- Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Dr. Luis Castelazo Ayala s/n, Industrial Animas, 91190, Xalapa, Veracruz, México.
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Zhao X, Cheng P, Xu R, Meng K, Liao S, Jia P, Zheng X, Xiao C. Insights into the development of pentylenetetrazole-induced epileptic seizures from dynamic metabolomic changes. Metab Brain Dis 2022; 37:2441-2455. [PMID: 35838870 DOI: 10.1007/s11011-022-01018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/26/2022] [Indexed: 10/17/2022]
Abstract
Epilepsy is often considered to be a progressive neurological disease, and the nature of this progression remains unclear. Understanding the overall and common metabolic changes of epileptic seizures can provide novel clues for their control and prevention. Herein, a chronic kindling animal model was established to obtain generalized tonic-clonic seizures via the repeated injections of pentylenetetrazole (PTZ) at subconvulsive dose. Dynamic metabolomic changes in plasma and urine from PTZ-kindled rats at the different kindling phases were explored using NMR-based metabolomics, in combination with behavioral assessment, brain neurotransmitter measurement, electroencephalography and histopathology. The increased levels of glucose, lactate, glutamate, creatine and creatinine, together with the decreased levels of pyruvate, citrate and succinate, ketone bodies, asparagine, alanine, leucine, valine and isoleucine in plasma and/or urine were involved in the development and progression of seizures. These altered metabolites reflected the pathophysiological processes including the compromised energy metabolism, the disturbed amino acid metabolism, the peripheral inflammation and changes in gut microbiota functions. NMR-based metabolomics could provide brain disease information by the dynamic plasma and urinary metabolic changes during chronic epileptic seizures, yielding classification of seizure stages and profound insights into controlling epilepsy via targeting deficient energy metabolism.
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Affiliation(s)
- Xue Zhao
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Peixuan Cheng
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Ru Xu
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Kaili Meng
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Sha Liao
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Pu Jia
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Xiaohui Zheng
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China
| | - Chaoni Xiao
- The College of Life Sciences, Northwest University, 710069, Xi'an, PR China.
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Zhang JM, Chen MJ, He JH, Li YP, Li ZC, Ye ZJ, Bao YH, Huang BJ, Zhang WJ, Kwan P, Mao YL, Qiao JD. Ketone Body Rescued Seizure Behavior of LRP1 Deficiency in Drosophila by Modulating Glutamate Transport. J Mol Neurosci 2022; 72:1706-1714. [PMID: 35668313 DOI: 10.1007/s12031-022-02026-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 05/10/2022] [Indexed: 11/26/2022]
Abstract
LRP1, the low-density lipoprotein receptor 1, would be a novel candidate gene of epilepsy according to our bioinformatic results and the animal study. In this study, we explored the role of LRP1 in epilepsy and whether beta-hydroxybutyrate, the principal ketone body of the ketogenic diet, can treat epilepsy caused by LRP1 deficiency in drosophila. UAS/GAL4 system was used to establish different genotype models. Flies were given standard, high-sucrose, and ketone body food randomly. The bang-sensitive test was performed on flies and seizure-like behavior was assessed. In morphologic experiments, we found that LRP1 deficiency caused partial loss of the ellipsoidal body and partial destruction of the fan-shaped body. Whole-body and glia LRP1 defect flies had a higher seizure rate compared to the control group. Ketone body decreased the seizure rate in behavior test in all LRP1 defect flies, compared to standard and high sucrose diet. Overexpression of glutamate transporter gene Eaat1 could mimic the ketone body effect on LRP1 deficiency flies. This study demonstrated that LRP1 defect globally or in glial cells or neurons could induce epilepsy in drosophila. The ketone body efficaciously rescued epilepsy caused by LRP1 knockdown. The results support screening for LRP1 mutations as discriminating conduct for individuals who require clinical attention and further clarify the mechanism of the ketogenic diet in epilepsy, which could help epilepsy patients make a precise treatment case by case.
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Affiliation(s)
- Jin-Ming Zhang
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Ming-Jie Chen
- The Third Medicine School, Guangzhou Medical University, Guangzhou, China
| | - Jiong-Hui He
- The Third Medicine School, Guangzhou Medical University, Guangzhou, China
| | - Ya-Ping Li
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Zhi-Cai Li
- The First Clinical Medicine School, Guangzhou Medical University, Guangzhou, China
| | - Zi-Jing Ye
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yong-Hui Bao
- School of Pediatrics, Guangzhou Medical University, Guangzhou, China
| | - Bing-Jun Huang
- School of Public Health, Guangzhou Medical University, Guangzhou, China
| | - Wen-Jie Zhang
- KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Ping Kwan
- School of Veterinary Science, University of Sydney, Sydney, Australia
| | - Yu-Ling Mao
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
- Key Laboratory for Reproductive Medicine of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Jing-da Qiao
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
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Zhao X, Liang L, Xu R, Cheng P, Jia P, Bai Y, Zhang Y, Zhao X, Zheng X, Xiao C. Revealing the Antiepileptic Effect of α-Asaronol on Pentylenetetrazole-Induced Seizure Rats Using NMR-Based Metabolomics. ACS OMEGA 2022; 7:6322-6334. [PMID: 35224394 PMCID: PMC8867478 DOI: 10.1021/acsomega.1c06922] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/28/2022] [Indexed: 05/04/2023]
Abstract
α-Asaronol from Acorus tatarinowii (known as "Shichangpu" in Traditional Chinese medicine) has been proved to possess more efficient antiepileptic activity and lower toxicity than α-asarone (namely "Xixinnaojiaonang" as an antiepileptic drug in China) in our previous study. However, the molecular mechanism of α-asaronol against epilepsy needs to be known if to become a novel antiepileptic medicine. Nuclear magnetic resonance (NMR)-based metabolomics was applied to investigate the metabolic patterns of plasma and the brain tissue extract from pentylenetetrazole (PTZ)-induced seizure rats when treated with α-asaronol or α-asarone. The results showed that α-asaronol can regulate the metabolomic level of epileptic rats to normal to some extent, and four metabolic pathways were associated with the antiepileptic effect of α-asaronol, including alanine, aspartate, and glutamate metabolism; synthesis and degradation of ketone bodies; glutamine and glutamate metabolism; and glycine, serine, and threonine metabolism. It was concluded that α-asaronol plays a vital role in enhancing energy metabolism, regulating the balance of excitatory and inhibitory neurotransmitters, and inhibiting cell membrane damage to prevent the occurrence of epilepsy. These findings are of great significance in developing α-asaronol into a promising antiepileptic drug derived from Traditional Chinese medicine.
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Sánchez-Hernández J, Aguilera P, Manjarrez-Marmolejo J, Franco-Pérez J. Fructose ingestion modifies NMDA receptors and exacerbates the seizures induced by kainic acid. Neurosci Lett 2022; 772:136476. [DOI: 10.1016/j.neulet.2022.136476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/17/2021] [Accepted: 01/20/2022] [Indexed: 12/24/2022]
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Lakshminarayanan K, Agarawal A, Panda PK, Sinha R, Tripathi M, Pandey RM, Gulati S. Efficacy of low glycemic index diet therapy (LGIT) in children aged 2-8 years with drug-resistant epilepsy: A randomized controlled trial. Epilepsy Res 2021; 171:106574. [PMID: 33582533 DOI: 10.1016/j.eplepsyres.2021.106574] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 01/29/2021] [Accepted: 02/05/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUND A classic ketogenic diet, even though effective in children with drug-resistant epilepsy is not tolerated well by them and cumbersome to prepare. Low glycemic index therapy (LGIT), the least restrictive with minimal adverse effects among ketogenic dietary therapies has been proven effective in uncontrolled trials, but a placebo-controlled trial in this regard is still lacking. METHODS In this open-label randomized controlled study, we randomized children above age two years with drug-resistant epilepsy into two groups (LGIT and control groups). Patients in the LGIT group received an add-on low glycemic index diet for 3 months along with the ongoing antiepileptic drugs and the patients in the control group did not receive any dietary intervention. Seizure frequency was assessed from the seizure diary maintained by the parents. Diet compliance was assessed using the diet diary that was maintained by the parents for three days just before the scheduled monthly visits of the patients. RESULTS Forty children with drug-refractory epilepsy (20 in each group) were enrolled. While 6/20 children in the LGIT arm have >50 % reduction in seizure frequency, none achieved this in the control arm (p = 0.02). The overall compliance with the low glycemic diet in the intervention group was 88.5 %. Out of six responders to LGIT, one child achieved seizure freedom and one achieved >90 % seizure reduction. Five continued LGIT further for a median duration of 8 months (range-4-12 months) successfully. The number needed to treat for more than 50 % seizure reduction was 3 and for more than 90 % seizure reduction was 10. The mean frequency of seizures for the intervention and control groups at three months of follow-up was not significantly different (p = 0.16), but the change in seizure frequency as compared to baseline was better in the intervention arm (p = 0.01). Three patients in the LGIT arm had non-serious adverse events (lethargy in two, vomiting in one). CONCLUSION In children aged 2-8 years with drug-refractory epilepsy, the administration of LGIT along with ongoing anti-seizure medications (ASM) is more efficacious in reducing seizure frequency as compared to ASM alone.
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Affiliation(s)
- Kannan Lakshminarayanan
- Paediatric Neurologist and Epileptologist, Gleneagles Global Hospital, Chennai, Tamilnadu, India
| | - Anuja Agarawal
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Prateek Kumar Panda
- Child Neurology Division, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, 110029, India; Pediatric Neurology Division, Department of Pediatrics, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, 249203, India
| | - Rahul Sinha
- DM Pediatric Neurology, Department of Pediatrics, Command Hospital, Chandigarh, India
| | - Manjari Tripathi
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Ravindra M Pandey
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Sheffali Gulati
- Child Neurology Division, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, 110029, India.
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Gavrilovici C, Rho JM. Metabolic epilepsies amenable to ketogenic therapies: Indications, contraindications, and underlying mechanisms. J Inherit Metab Dis 2021; 44:42-53. [PMID: 32654164 DOI: 10.1002/jimd.12283] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 12/20/2022]
Abstract
Metabolic epilepsies arise in the context of rare inborn errors of metabolism (IEM), notably glucose transporter type 1 deficiency syndrome, succinic semialdehyde dehydrogenase deficiency, pyruvate dehydrogenase complex deficiency, nonketotic hyperglycinemia, and mitochondrial cytopathies. A common feature of these disorders is impaired bioenergetics, which through incompletely defined mechanisms result in a wide spectrum of neurological symptoms, such as epileptic seizures, developmental delay, and movement disorders. The ketogenic diet (KD) has been successfully utilized to treat such conditions to varying degrees. While the mechanisms underlying the clinical efficacy of the KD in IEM remain unclear, it is likely that the proposed heterogeneous targets influenced by the KD work in concert to rectify or ameliorate the downstream negative consequences of genetic mutations affecting key metabolic enzymes and substrates-such as oxidative stress and cell death. These beneficial effects can be broadly grouped into restoration of impaired bioenergetics and synaptic dysfunction, improved redox homeostasis, anti-inflammatory, and epigenetic activity. Hence, it is conceivable that the KD might prove useful in other metabolic disorders that present with epileptic seizures. At the same time, however, there are notable contraindications to KD use, such as fatty acid oxidation disorders. Clearly, more research is needed to better characterize those metabolic epilepsies that would be amenable to ketogenic therapies, both experimentally and clinically. In the end, the expanded knowledge base will be critical to designing metabolism-based treatments that can afford greater clinical efficacy and tolerability compared to current KD approaches, and improved long-term outcomes for patients.
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Affiliation(s)
- Cezar Gavrilovici
- Departments of Neurosciences and Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Jong M Rho
- Departments of Neurosciences and Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
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Neves GS, Lunardi MS, Lin K, Rieger DK, Ribeiro LC, Moreira JD. Ketogenic diet, seizure control, and cardiometabolic risk in adult patients with pharmacoresistant epilepsy: a review. Nutr Rev 2020; 79:931-944. [PMID: 33230563 DOI: 10.1093/nutrit/nuaa112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Pharmacoresistant epilepsy causes serious deleterious effects on the patient's health and quality of life. For this condition, a ketogenic diet (KD) is a treatment option. The KD is a general term for a set of diets that contain high amounts of fat and low content of carbohydrates. The most prominent KD treatments are classical KD (4:1 ratio of fat to carbohydrate), modified Atkins diet (2:1 to 1:1 ratio), medium-chain triglycerides KD (with medium-chain triglyceride as a part of the fat content), and low glycemic index KD (using low glycemic carbohydrates). KD has been widely prescribed for children with epilepsy but not for adult patients. One of the main concerns about adult use of KD is its cardiovascular risk associated with high-fat and cholesterol intake. Therefore, this narrative review provides comprehensive information of the current literature on the effects of KD on lipid profile, glycemic-control biomarkers, and other cardiometabolic risk factors in adult patients with pharmacoresistant epilepsy.
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Affiliation(s)
- Gabriela S Neves
- Postgraduate Program in Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Translational Nutrition Neuroscience Working Group, CNPq Directory of Research Groups, Florianópolis, Santa Catarina, Brazil
| | - Mariana S Lunardi
- Postgraduate Program in Medical Sciences, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Translational Nutrition Neuroscience Working Group, CNPq Directory of Research Groups, Florianópolis, Santa Catarina, Brazil
| | - Katia Lin
- Postgraduate Program in Medical Sciences, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Débora Kurrle Rieger
- Postgraduate Program in Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Department of Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Translational Nutrition Neuroscience Working Group, CNPq Directory of Research Groups, Florianópolis, Santa Catarina, Brazil
| | - Letícia C Ribeiro
- Department of Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Translational Nutrition Neuroscience Working Group, CNPq Directory of Research Groups, Florianópolis, Santa Catarina, Brazil
| | - Júlia D Moreira
- Postgraduate Program in Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Department of Nutrition, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Translational Nutrition Neuroscience Working Group, CNPq Directory of Research Groups, Florianópolis, Santa Catarina, Brazil
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Fontaine C, Lemiale V, Resche-Rigon M, Schenck M, Chelly J, Geeraerts T, Hamdi A, Guitton C, Meziani F, Lefrant JY, Megarbane B, Mentec H, Chaffaut C, Cariou A, Legriel S. Association of systemic secondary brain insults and outcome in patients with convulsive status epilepticus: A post hoc study of a randomized controlled trial. Neurology 2020; 95:e2529-e2541. [PMID: 32913029 DOI: 10.1212/wnl.0000000000010726] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 06/04/2020] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To evaluate the association between systemic factors (mean arterial blood pressure, arterial partial pressures of carbon dioxide and oxygen, body temperature, natremia, and glycemia) on day 1 and neurologic outcomes 90 days after convulsive status epilepticus. METHODS This was a post hoc analysis of the Evaluation of Therapeutic Hypothermia in Convulsive Status Epilepticus in Adults in Intensive Care (HYBERNATUS) multicenter open-label controlled trial, which randomized 270 critically ill patients with convulsive status epilepticus requiring mechanical ventilation to therapeutic hypothermia (32°C-34°C for 24 hours) plus standard care or standard care alone between March 2011 and January 2015. The primary endpoint was a Glasgow Outcome Scale score of 5, defining a favorable outcome, 90 days after convulsive status epilepticus. RESULTS The 172 men and 93 women had a median age of 57 years (45-68 years). Among them, 130 (49%) had a history of epilepsy, and 59 (29%) had a primary brain insult. Convulsive status epilepticus was refractory in 86 (32%) patients, and total seizure duration was 67 minutes (35-120 minutes). The 90-day outcome was unfavorable in 126 (48%) patients. In multivariate analysis, none of the systemic secondary brain insults were associated with outcome; achieving an unfavorable outcome was associated with age >65 years (odds ratio [OR] 2.17, 95% confidence interval [CI] 1.20-3.85; p = 0.01), refractory convulsive status epilepticus (OR 2.00, 95% CI 1.04-3.85; p = 0.04), primary brain insult (OR 2.00, 95% CI 1.02-4.00; p = 0.047), and no bystander-witnessed seizure onset (OR 2.49, 95% CI 1.05-5.59; p = 0.04). CONCLUSIONS In our population, systemic secondary brain insults were not associated with outcome in critically ill patients with convulsive status epilepticus. CLINICALTRIALSGOV IDENTIFIER NCT01359332.
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Affiliation(s)
- Candice Fontaine
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Virginie Lemiale
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Matthieu Resche-Rigon
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Maleka Schenck
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Jonathan Chelly
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Thomas Geeraerts
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Aicha Hamdi
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Christophe Guitton
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Ferhat Meziani
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Jean-Yves Lefrant
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Bruno Megarbane
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Hervé Mentec
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Cendrine Chaffaut
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Alain Cariou
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France
| | - Stephane Legriel
- From the Medical-Surgical Intensive Care Unit (C.F.), Hopital Paris Saint Joseph, Paris; IctalGroup (C.F., J.C., S.L.), Le Chesnay; Medical Intensive Care Unit (V.L.) and SBIM Biostatistics and Medical Information (M.R.-R., C.C.), Saint Louis University Hospital; Université Paris Diderot (M.R.-R., C.C.); ECSTRA Team (Epidémiologie Clinique et Statistiques pour la Recherche en Santé) (M.R.-R.), UMR 1153 INSERM, Université Paris Diderot, Sorbonne Paris Cité; Medical Intensive Care Unit (M.S.), Hôpital de Hautepierre, and Medical Intensive Care Unit (F.M.), Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg; Medical-Surgical Intensive Care Unit (J.C.), Centre Hospitalier de Melun; Anesthesiology and Critical Care Department (T.G.), Toulouse University Hospital, University Toulouse 3 Paul Sabatier; Medical-Surgical Intensive Care Unit (A.H.), Centre Hospitalier de Montreuil; Medical-Surgical Intensive Care Unit (C.G.), Centre Hospitalier du Mans, Le Mans; EA 7293 (F.M.), Fédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Université de Strasbourg; Intensive Care Units (J.-Y.L.), Division of Anaesthesia, Intensive Care, Pain and Emergency Medicine, University Hospital of Nîmes; Medical Intensive Care Unit (B.M.), Lariboisiere University Hospital, APHP, Paris; Medical-Surgical Intensive Care Unit (H.M.), Centre Hospitalier Victor Dupouy, Argenteuil; Medical Intensive Care Unit (A.C.), Cochin University Hospital, Hopitaux Universitaires-Paris Centre, AP-HP; Paris Descartes University (A.C.), Sorbonne Paris Cité-Medical School; INSERM U970 (A.C.), Paris Cardiovascular Research Center; Intensive Care Department (S.L.), Centre Hospitalier de Versailles-Site André Mignot, Le Chesnay; and Université Paris-Saclay (S.L.), UVSQ, Inserm, CESP, Team DevPsy, Villejuif, France.
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15
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Nesci V, Russo E, Arcidiacono B, Citraro R, Tallarico M, Constanti A, Brunetti A, De Sarro G, Leo A. Metabolic Alterations Predispose to Seizure Development in High-Fat Diet-Treated Mice: the Role of Metformin. Mol Neurobiol 2020; 57:4778-4789. [PMID: 32785826 DOI: 10.1007/s12035-020-02062-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/07/2020] [Indexed: 12/15/2022]
Abstract
The link between epilepsy and type 2 diabetes (T2DM) and/or metabolic syndrome (MetS) has been poorly investigated. Therefore, we tested whether a high-fat diet (HFD), inducing insulin-resistant diabetes and obesity in mice, would increase susceptibility to develop generalized seizures induced by pentylentetrazole (PTZ) kindling. Furthermore, molecular mechanisms linked to glucose brain transport and the effects of the T2DM antidiabetic drug metformin were also studied along with neuropsychiatric comorbidities. To this aim, two sets of experiments were performed in CD1 mice, in which we firstly evaluated the HFD effects on some metabolic and behavioral parameters in order to have a baseline reference for kindling experiments assessed in the second section of our protocol. We detected that HFD predisposes towards seizure development in the PTZ-kindling model and this was linked to a reduction in glucose transporter-1 (GLUT-1) expression as observed in GLUT-1 deficiency syndrome in humans but accompanied by a compensatory increase in expression of GLUT-3. While we confirmed that HFD induced neuropsychiatric alterations in the treated mice, it did not change the development of kindling comorbidities. Furthermore, we propose that the beneficial effects of metformin we observed towards seizure development are related to a normalization of both GLUT-1 and GLUT-3 expression levels. Overall, our results support the hypothesis that an altered glycometabolic profile could play a pro-epileptic role in human patients. We therefore recommend that MetS or T2DM should be constantly monitored and possibly avoided in patients with epilepsy, since they could further aggravate this latter condition.
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Affiliation(s)
- Valentina Nesci
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Emilio Russo
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy. .,C.I.S.-Interdepartmental Services Centre of Veterinary for Human and Animal Health, Magna Graecia University of Catanzaro, Viale Europa, Loc. Germaneto, 88100, Catanzaro, Italy.
| | - Biagio Arcidiacono
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Rita Citraro
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Martina Tallarico
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Andrew Constanti
- Department of Pharmacology, UCL School of Pharmacy, 29/39 Brunswick Square, London, UK
| | - Antonio Brunetti
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Giovambattista De Sarro
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
| | - Antonio Leo
- Science of Health Department, School of Medicine, University "Magna Graecia" of Catanzaro, Viale Europa e Germaneto, 88100, Catanzaro, Italy
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16
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The Role of Secondary Brain Insults in Status Epilepticus: A Systematic Review. J Clin Med 2020; 9:jcm9082521. [PMID: 32764270 PMCID: PMC7465284 DOI: 10.3390/jcm9082521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 07/26/2020] [Accepted: 08/03/2020] [Indexed: 11/17/2022] Open
Abstract
(1) Background: Little is known about the impact of pathophysiological mechanisms that underlie the enhancement of excitotoxicity and the neuronal consequences of status epilepticus (SE), as well as the clinical consequences of secondary brain insults (SBI) in patients with SE on outcome; (2) Methods: Electronic searches were conducted in May 2020 using Medline via PubMed, Embase, and Google Scholar (#CRD42019139092). Experimental studies of animals or randomized, observational, controlled trials of patients with SE in indexed journals were included. There were no language or date restrictions for the published literature included in this review. Information was extracted on study design, sample size, SBI characteristics, and primary and secondary outcomes, including the timing of evaluation; (3) Results: Among the 2209 articles responding to our inclusion criteria, 56 were included in this systematic review. There are numerous experimental data reporting the deleterious effects associated with each of the SBI in animals exposed to SE. In humans, only the effect of target temperature management in hypothermia (32-34 °C) has been explored. (4) Conclusions: There is little experimental evidence that favors the control of secondary brain insult after SE. Further studies are required to assess the neuroprotective interest of secondary brain insult control after SE in humans.
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17
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de Sousa GJ, Tittel SR, Häusler M, Holterhus PM, Berger G, Holder M, Kamrath C, Golembowski S, Herrlinger S, Holl RW. Type 1 diabetes and epilepsy in childhood and adolescence: Do glutamic acid decarboxylase autoantibodies play a role? Data from the German/Austrian/Swiss/Luxembourgian DPV Registry. Pediatr Diabetes 2020; 21:766-773. [PMID: 32333480 DOI: 10.1111/pedi.13034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/23/2020] [Accepted: 04/16/2020] [Indexed: 11/28/2022] Open
Abstract
AIMS We aimed to analyze the relationship between epilepsy and glutamic acid decarboxylase autoantibodies (GADA) in patients with type 1 diabetes mellitus (T1DM) and the impact of GADA on demographic, clinical, and metabolic data in T1DM patients with epilepsy. METHODS We searched for patients with T1DM ≤20 years and GADA measurements, and within this group for patients with epilepsy. We formed groups: T1DM + Epilepsy + GADA positive; T1DM + Epilepsy + GADA negative; T1DM + GADA positive; T1DM + GADA negative. We used logistic regression to analyze the relationship between epilepsy and GADA with odds ratio adjusted for sex, duration of diabetes (DOD), and age at diabetes onset (ADO). We used logistic regression with odds ratio adjusted for DOD and ADO onset using epilepsy as a dependent variable and GADA, HbA1c, ketoacidosis, severe hypoglycemia (SH), sex, celiac disease, and autoimmune thyroiditis as independent variables. We conducted regression analyses adjusted for sex, DOD, and ADO to analyze differences in clinical/metabolic parameters between the groups. RESULTS Epilepsy was not more frequent in GADA-positive patients (GPP). Logistic regression including all patients with GADA measurements showed that hypoglycemia with coma (HC) correlated with epilepsy when compared to no SH. We found no differences in clinical and metabolic data between GPP and GADA-negative patients (GNP) with epilepsy. SH occurred more often in GPP with epilepsy in comparison to GPP without epilepsy. GNP with epilepsy had a higher rate of HC than GPP without epilepsy. CONCLUSION We found no relationship between epilepsy and GADA. A relationship between T1DM and epilepsy might be explainable by SH.
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Affiliation(s)
- Gideon John de Sousa
- Children's Hospital Dortmund, Dortmund, Germany.,Department of Pediatrics, University of Witten/Herdecke, Witten, Germany
| | - Sascha René Tittel
- Institute of Epidemiology and Medical Biometry, Central Institute for Biomedical Technology, University of Ulm, Ulm, Germany.,German Center for Diabetes Research (DZD), Munich-Neuherberg, Germany
| | - Martin Häusler
- Division of Neuropediatrics and Social Pediatrics, Department of Pediatrics, University Hospital RWTH Aachen, Aachen, Germany
| | | | | | - Martin Holder
- Children's Hospital, Olgahospital Stuttgart, Stuttgart, Germany
| | - Clemens Kamrath
- Children's Hospital, University of Giessen, Giessen, Germany
| | - Sven Golembowski
- Children's Hospital, Sana Klinikum Lichtenberg Berlin, Berlin, Germany
| | | | - Reinhard Walter Holl
- Institute of Epidemiology and Medical Biometry, Central Institute for Biomedical Technology, University of Ulm, Ulm, Germany.,German Center for Diabetes Research (DZD), Munich-Neuherberg, Germany
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18
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Méndez-González MP, Rivera-Aponte DE, Benedikt J, Maldonado-Martínez G, Tejeda-Bayron F, Skatchkov SN, Eaton MJ. Downregulation of Astrocytic Kir4.1 Potassium Channels Is Associated with Hippocampal Neuronal Hyperexcitability in Type 2 Diabetic Mice. Brain Sci 2020; 10:brainsci10020072. [PMID: 32019062 PMCID: PMC7071513 DOI: 10.3390/brainsci10020072] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 01/22/2020] [Indexed: 11/16/2022] Open
Abstract
Epilepsy, characterized by recurrent seizures, affects 1% of the general population. Interestingly, 25% of diabetics develop seizures with a yet unknown mechanism. Hyperglycemia downregulates inwardly rectifying potassium channel 4.1 (Kir4.1) in cultured astrocytes. Therefore, the present study aims to determine if downregulation of functional astrocytic Kir4.1 channels occurs in brains of type 2 diabetic mice and could influence hippocampal neuronal hyperexcitability. Using whole-cell patch clamp recording in hippocampal brain slices from male mice, we determined the electrophysiological properties of stratum radiatum astrocytes and CA1 pyramidal neurons. In diabetic mice, astrocytic Kir4.1 channels were functionally downregulated as evidenced by multiple characteristics including depolarized membrane potential, reduced barium-sensitive Kir currents and impaired potassium uptake capabilities of hippocampal astrocytes. Furthermore, CA1 pyramidal neurons from diabetic mice displayed increased spontaneous activity: action potential frequency was ≈9 times higher in diabetic compared with non-diabetic mice and small EPSC event frequency was significantly higher in CA1 pyramidal cells of diabetics compared to non-diabetics. These differences were apparent in control conditions and largely pronounced in response to the pro-convulsant 4-aminopyridine. Our data suggest that astrocytic dysfunction due to downregulation of Kir4.1 channels may increase seizure susceptibility by impairing astrocytic ability to maintain proper extracellular homeostasis.
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Affiliation(s)
- Miguel P. Méndez-González
- Department of Biochemistry, Universidad Central del Caribe, Bayamón, PR 00960-6032, USA; (M.P.M.-G.); (F.T.-B.)
- Department of Sciences and Technology, Antilles Adventist University, Mayaguez, PR 00680, USA
- Department of Natural Sciences, University of Puerto Rico, Aguadilla, PR 00604-6150, USA
| | - David E. Rivera-Aponte
- Department of Biochemistry, Universidad Central del Caribe, Bayamón, PR 00960-6032, USA; (M.P.M.-G.); (F.T.-B.)
| | - Jan Benedikt
- Departments of Physiology and Biochemistry Universidad Central del Caribe, Bayamón, PR 00960-6032, USA;
| | | | - Flavia Tejeda-Bayron
- Department of Biochemistry, Universidad Central del Caribe, Bayamón, PR 00960-6032, USA; (M.P.M.-G.); (F.T.-B.)
| | - Serguei N. Skatchkov
- Department of Biochemistry, Universidad Central del Caribe, Bayamón, PR 00960-6032, USA; (M.P.M.-G.); (F.T.-B.)
- Departments of Physiology and Biochemistry Universidad Central del Caribe, Bayamón, PR 00960-6032, USA;
- Correspondence: (S.N.S.); (M.J.E.); Tel.: +787-798-3001 (ext. 2057) (S.N.S.); +787-798-3001 (ext. 2034) (M.J.E.); Fax: +787-786-6285 (M.J.E.)
| | - Misty J. Eaton
- Department of Biochemistry, Universidad Central del Caribe, Bayamón, PR 00960-6032, USA; (M.P.M.-G.); (F.T.-B.)
- Correspondence: (S.N.S.); (M.J.E.); Tel.: +787-798-3001 (ext. 2057) (S.N.S.); +787-798-3001 (ext. 2034) (M.J.E.); Fax: +787-786-6285 (M.J.E.)
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19
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Nonketotic Hyperglycemia-related Seizures of Left Parieto-occipital Origin: A Case Report. J Neurosci Nurs 2019; 52:27-29. [PMID: 31809405 DOI: 10.1097/jnn.0000000000000481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Nonketotic hyperglycemia-related seizures are not uncommonly encountered in clinical practice. Their presentation varies, and they may cause serious consequences if they remain unnoticed. CASE We report a case of nonketotic hyperglycemia-related seizures of unique left parieto-occipital origin and semiology, presenting as focal aware (simple partial) and impaired awareness (complex partial) seizures, including contralateral limb convulsion and apraxialike behavior. DISCUSSION Nonketotic hyperglycemia-related seizures can present with a relatively unique semiology. Careful education to the patients and family regarding attention to the paroxysmal symptoms and an effort to maintain good glycemic control are mandatory in clinical practice.
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20
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Gruenbaum SE, Chen EC, Sandhu MRS, Deshpande K, Dhaher R, Hersey D, Eid T. Branched-Chain Amino Acids and Seizures: A Systematic Review of the Literature. CNS Drugs 2019; 33:755-770. [PMID: 31313139 DOI: 10.1007/s40263-019-00650-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Up to 40% of patients with epilepsy experience seizures despite treatment with antiepileptic drugs; however, branched-chain amino acid (BCAA) supplementation has shown promise in treating refractory epilepsy. OBJECTIVES The purpose of this systematic review was to evaluate all published studies that investigated the effects of BCAAs on seizures, emphasizing therapeutic efficacy and possible underlying mechanisms. METHODS On 31 January, 2017, the following databases were searched for relevant studies: MEDLINE (OvidSP), EMBASE (OvidSP), Scopus (Elsevier), the Cochrane Library, and the unindexed material in PubMed (National Library of Medicine/National Institutes of Health). The searches were repeated in all databases on 18 February, 2019. We only included full-length preclinical and clinical studies that were published in the English language that examined the effects of BCAA administration on seizures. RESULTS Eleven of 2045 studies met our inclusion criteria: ten studies were conducted in animal models and one study in human subjects. Seven seizure models were investigated: the strychnine (one study), pentylenetetrazole (two studies), flurothyl (one study), picrotoxin (two studies), genetic absence epilepsy in rats (one study), kainic acid (two studies), and methionine sulfoximine (one study) paradigms. Three studies investigated the effect of a BCAA mixture whereas the other studies explored the effects of individual BCAAs on seizures. In most animal models and in humans, BCAAs had potent anti-seizure effects. However, in the methionine sulfoximine model, long-term BCAA supplementation worsened seizure propagation and caused neuron loss, and in the genetic absence epilepsy in rats model, BCAAs exhibited pro-seizure effects. CONCLUSIONS The contradictory effects of BCAAs on seizure activity likely reflect differences in the complex mechanisms that underlie seizure disorders. Some of these mechanisms are likely mediated by BCAA's effects on glucose, glutamate, glutamine, and ammonia metabolism, activation of the mechanistic target of rapamycin signaling pathway, and their effects on aromatic amino acid transport and neurotransmitter synthesis. We propose that a better understanding of mechanisms by which BCAAs affect seizures and neuronal viability is needed to advance the field of BCAA supplementation in epilepsy.
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Affiliation(s)
- Shaun E Gruenbaum
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, FL, USA.
| | - Eric C Chen
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | | | - Ketaki Deshpande
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Roni Dhaher
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Denise Hersey
- Lewis Science Library, Princeton University, Princeton, NJ, USA
| | - Tore Eid
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
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21
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Qi X, Tester RF. The 'epileptic diet'- ketogenic and/or slow release of glucose intervention: A review. Clin Nutr 2019; 39:1324-1330. [PMID: 31227228 DOI: 10.1016/j.clnu.2019.05.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/08/2019] [Accepted: 05/30/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND & AIMS The ketogenic diet is high in fat content, adequate with respect to protein but low in carbohydrate and designed to provide brain energy as ketone bodies rather than glucose. The consequence is that epilepsy can be managed and endurance (sport) related energy be derived from fat rather than ingested or stored (glycogen) carbohydrate. This review aims to set the diet in context for seizure related intervention, sport and potential modern variants with respect to glucose management - which have many medical (including epilepsy potentially) and activity related applications. METHODS The literature was reviewed using relevant data bases (e.g. Pubmed, Science Direct, Web of Science, Wiley on Line Library) and relevant articles were selected to provide historic and contemporary data for the text and associated Tables. RESULTS It is clear great health related benefits have been achieved by feeding the ketogenic to individuals subject to seizures where it helps manage the malaise. Sports applications are evident to. Glucose control diets provide health benefits of the ketogenic diet potentially and there is some evidence they are/can be very effective. CONCLUSIONS Key to epilepsy and sport performance is the control of blood glucose. The ketogenic diet has proven to be very effective in this regard but now other approaches to control blood glucose ae being evaluated which have advantages over the ketogenic diet. This therapeutic approach of clinical nutrition will undoubtedly move forwards over the next few years in view of the negative aspects of the ketogenic diet.
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Affiliation(s)
- Xin Qi
- Glycologic Limited, Glasgow, G4 0BA, UK.
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Kang KW, Kim SH, Kim JM, Nam TS, Choi KH, Kim MK. Ictal SPECT in Diagnosis of Non-Ketotic Hyperglycemia-Related Seizure Manifesting as Speech Arrest. J Clin Neurol 2019; 15:253-255. [PMID: 30877697 PMCID: PMC6444151 DOI: 10.3988/jcn.2019.15.2.253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 11/25/2022] Open
Affiliation(s)
- Kyung Wook Kang
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Sang Hoon Kim
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Jae Myung Kim
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Tai Seung Nam
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - Kang Ho Choi
- Department of Neurology, Chonnam National University Medical School, Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Myeong Kyu Kim
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea.,Department of Neurology, Chonnam National University Medical School, Gwangju, Korea.
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Kinnear KM, Warner NM, Haltiner AM, Doherty MJ. Continuous monitoring devices and seizure patterns by glucose, time and lateralized seizure onset. EPILEPSY & BEHAVIOR CASE REPORTS 2018; 10:65-70. [PMID: 30073145 PMCID: PMC6068315 DOI: 10.1016/j.ebcr.2018.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/27/2018] [Accepted: 03/12/2018] [Indexed: 01/14/2023]
Abstract
Objectives To investigate if glucose levels influence seizure patterns. Materials and methods In a patient with RNS/NeuroPace implanted bi-temporally and type 1 diabetes mellitus, seizure event times and onset locations were matched to continuous tissue glucose. Results Left focal seizure (LFS, n = 22) glucoses averaged 169 mg/dL, while right focal seizure (RFS, n = 23) glucoses averaged 131 mg/dL (p = 0.03). LFS occurred at mean time 17:02 while RFS occurred at 04:23. LFS spread to the contralateral side (n = 19) more than RFS (n = 2). Conclusion Seizure onset laterality and spread vary with glucose and time of seizure.
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Metabolism and epilepsy: Ketogenic diets as a homeostatic link. Brain Res 2018; 1703:26-30. [PMID: 29883626 DOI: 10.1016/j.brainres.2018.05.049] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 05/08/2018] [Accepted: 05/31/2018] [Indexed: 12/17/2022]
Abstract
Metabolic dysfunction can underlie seizure disorders, and metabolism-based treatments can afford seizure control and promote homeostasis. This relationship between metabolism and the risk of sporadic seizures was observed historically with the clinical success of a low-carbohydrate, high-fat, ketosis-inducing ketogenic diet - a treatment that remains relevant today, and one that has been shown to be effective against medically refractory epilepsy. Mechanisms underlying the success of the ketogenic diet are a topic of intense research efforts - not only because of proven success in arresting treatment-resistant seizures, but also because recent evidence suggests that altering metabolism with a ketogenic diet enables a homeostatic state in the brain that is less excitable, and hence raises the threshold for seizure genesis. Metabolic therapy with a ketogenic diet has been shown to normalize a range of abnormal physiological and behavioral parameters and may also make the central nervous system more resilient to other insults or physiological stresses. Because the therapeutic ability of such a diet may be more limited than a drug because of a dose "ceiling", investigations are underway to develop and test analogous or supplemental approaches. In addition, significant efforts have been made to demonstrate broader applications of metabolic therapy in promoting health and preventing disease, including conditions where epileptic seizures manifest in a comorbid fashion.
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Navidhamidi M, Ghasemi M, Mehranfard N. Epilepsy-associated alterations in hippocampal excitability. Rev Neurosci 2018; 28:307-334. [PMID: 28099137 DOI: 10.1515/revneuro-2016-0059] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/03/2016] [Indexed: 11/15/2022]
Abstract
The hippocampus exhibits a wide range of epilepsy-related abnormalities and is situated in the mesial temporal lobe, where limbic seizures begin. These abnormalities could affect membrane excitability and lead to overstimulation of neurons. Multiple overlapping processes refer to neural homeostatic responses develop in neurons that work together to restore neuronal firing rates to control levels. Nevertheless, homeostatic mechanisms are unable to restore normal neuronal excitability, and the epileptic hippocampus becomes hyperexcitable or hypoexcitable. Studies show that there is hyperexcitability even before starting recurrent spontaneous seizures, suggesting although hippocampal hyperexcitability may contribute to epileptogenesis, it alone is insufficient to produce epileptic seizures. This supports the concept that the hippocampus is not the only substrate for limbic seizure onset, and a broader hyperexcitable limbic structure may contribute to temporal lobe epilepsy (TLE) seizures. Nevertheless, seizures also occur in conditions where the hippocampus shows a hypoexcitable phenotype. Since TLE seizures most often originate in the hippocampus, it could therefore be assumed that both hippocampal hypoexcitability and hyperexcitability are undesirable states that make the epileptic hippocampal network less stable and may, under certain conditions, trigger seizures.
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Baviera M, Roncaglioni MC, Tettamanti M, Vannini T, Fortino I, Bortolotti A, Merlino L, Beghi E. Diabetes mellitus: a risk factor for seizures in the elderly-a population-based study. Acta Diabetol 2017. [PMID: 28631057 DOI: 10.1007/s00592-017-1011-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AIMS To evaluate the association between diabetes mellitus (DM) and risk of seizures in a well-defined elderly population. METHODS The administrative databases of the Lombardy region (a 10 million population area in Northern Italy) were used to identify persons aged 65 years or older with DM (defined by prescription of antidiabetic drugs and/or through ICD-9 CM code and/or exemption code for diabetes) during the year 2002. Seizure-free DM subjects were followed until 2012 in search of individuals with incident seizures (identified through ICD-9 CM codes for epilepsy/seizures or ATC codes for antiepileptic drugs associated with the prescription of an electroencephalogram). To adjust for confounding, comorbidities having epileptogenic potential were also identified through the ICD-9 CM codes. RESULTS The population at risk included 1,494,071 persons. Of these, 136,941 seizure-free patients had DM. At the end of follow-up, the cumulative time-dependent incidence of seizures was 3.0% in DM patients and 1.9% in No-diabetic individuals (hazard ratio, HR 1.47; 95% confidence interval, 1.41-1.53, adjusted for age classes, sex, comorbidities and number of hospital admission). The HR was unchanged in patients with no history of stroke. The cumulative incidence of seizures after DM increased with the number of hospital admissions. CONCLUSIONS DM is an independent risk factor for seizures in elderly individuals. In diabetic patients, the risk of seizures increases with the number of comorbidities, supporting the role of vascular disease as a cause of seizures.
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Affiliation(s)
- Marta Baviera
- Laboratory of Cardiovascular Prevention, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe La Masa 19, 20156, Milan, Italy.
| | - Maria Carla Roncaglioni
- Laboratory of Cardiovascular Prevention, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe La Masa 19, 20156, Milan, Italy
| | - Mauro Tettamanti
- Laboratory of Geriatric Neuropsychiatry, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy
| | - Tommaso Vannini
- Laboratory of Cardiovascular Prevention, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe La Masa 19, 20156, Milan, Italy
| | - Ida Fortino
- Regional Health Ministry, Lombardy Region, Milan, Italy
| | | | - Luca Merlino
- Regional Health Ministry, Lombardy Region, Milan, Italy
| | - Ettore Beghi
- Laboratory of Neurological Disorders, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy
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Zarnowska I, Luszczki JJ, Zarnowski T, Wlaz P, Czuczwar SJ, Gasior M. Proconvulsant effects of the ketogenic diet in electroshock-induced seizures in mice. Metab Brain Dis 2017; 32:351-358. [PMID: 27644408 PMCID: PMC5346421 DOI: 10.1007/s11011-016-9900-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 08/19/2016] [Indexed: 11/03/2022]
Abstract
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. When compared to mice fed the standard rodent chow diet (SRCD), we found that mice fed the KD were more sensitive to electroconvulsions as reflected by a significant decrease in seizure threshold (3.86 mA in mice on the KD vs 7.29 mA in mice on the SRCD; P < 0.05) in the maximal electroshock seizure threshold (MEST) test. To examine if this increased seizure sensitivity to electroconvulsions produced by the KD would affect anticonvulsant effects of antiepileptic drugs (AEDs), anticonvulsant potencies of carbamazepine (CBZ), phenobarbital (PB), phenytoin (PHT), and valproate (VPA) against maximal electroshock (MES)-induced convulsions were compared in mice fed the KD and SRCD. We found that potencies of all AEDs studied were decreased in mice fed the KD in comparison to those on the SRCD, with decreases in the anticonvulsant potencies ranging from 1.4 fold (PB) to 1.7 fold (PHT). Finally, the lack of differences in brain exposures of the AEDs studied in mice fed the KD and SRCD ruled out a pharmacokinetic nature of the observed findings. Taken together, exposure to the KD in the present study had an overall pro-convulsant effect. Since electroconvulsions require large metabolic reserves to support their rapid spread throughout the brain and consequent generalized tonic-clonic convulsions, this effect may be explained by a high energy state produced by the KD in regards to increased energy storage and utilization.
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Affiliation(s)
- Iwona Zarnowska
- Department of Pathophysiology, Medical University, Jaczewskiego 8, 20-090, Lublin, Poland.
| | - Jarogniew J Luszczki
- Department of Pathophysiology, Medical University, Jaczewskiego 8, 20-090, Lublin, Poland
- Department of Physiopathology, Institute of Agricultural Medicine, Jaczewskiego 2, 20-950, Lublin, Poland
| | - Tomasz Zarnowski
- Chair of Ophthalmology, Medical University, Chmielna 1, 20-079, Lublin, Poland
| | - Piotr Wlaz
- Department of Animal Physiology, Institute of Biology and Biochemisry, Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Stanislaw J Czuczwar
- Department of Pathophysiology, Medical University, Jaczewskiego 8, 20-090, Lublin, Poland
- Department of Physiopathology, Institute of Agricultural Medicine, Jaczewskiego 2, 20-950, Lublin, Poland
| | - Maciej Gasior
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA, USA.
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Lee E, Kim K, Lee E, Lee J. Characteristic MRI findings in hyperglycaemia-induced seizures: diagnostic value of contrast-enhanced fluid-attenuated inversion recovery imaging. Clin Radiol 2016; 71:1240-1247. [DOI: 10.1016/j.crad.2016.05.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/26/2016] [Accepted: 05/03/2016] [Indexed: 11/26/2022]
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Chou IC, Wang CH, Lin WD, Tsai FJ, Lin CC, Kao CH. Risk of epilepsy in type 1 diabetes mellitus: a population-based cohort study. Diabetologia 2016; 59:1196-203. [PMID: 27030312 DOI: 10.1007/s00125-016-3929-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 02/26/2016] [Indexed: 12/16/2022]
Abstract
AIMS/HYPOTHESIS Type 1 diabetes mellitus is a major public health problem of increasing global concern, with potential neurological complications. A possible association exists between type 1 diabetes and subsequent epilepsy. This study evaluated the relationship between type 1 diabetes and epilepsy in Taiwan. METHODS Claims data from the Taiwan National Health Insurance Research Database were used to conduct retrospective cohort analyses. The study cohort contained 2568 patients with type 1 diabetes, each of whom was frequency-matched by sex, urbanisation of residence area and index year with ten patients without type 1 diabetes. Cox proportional hazard regression analysis was conducted to estimate the effects of type 1 diabetes on epilepsy risk. RESULTS In patients with type 1 diabetes, the risk of developing epilepsy was significantly higher than that in patients without type 1 diabetes (p < 0.0001 for logrank test). After adjustment for potential confounders, the type 1 diabetes cohort was 2.84 times as likely to develop epilepsy than the control cohort was (HR 2.84 [95% CI 2.11, 3.83]). CONCLUSIONS/INTERPRETATION Patients with type 1 diabetes are at an increased risk of developing epilepsy. Metabolic abnormalities of type 1 diabetes, such as hyperglycaemia and hypoglycaemia, may have a damaging effect on the central nervous system and be associated with significant long-term neurological sequelae. The causative factors between type 1 diabetes and the increased risk of epilepsy require further investigation.
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Affiliation(s)
- I-Ching Chou
- Department of Pediatric Neurology, China Medical University Children's Hospital, Taichung, Taiwan
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Chung-Hsing Wang
- Department of Pediatric Neurology, China Medical University Children's Hospital, Taichung, Taiwan
- Department of Pediatric Genetics, China Medical University Children's Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Wei-De Lin
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
- School of Post Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Fuu-Jen Tsai
- Department of Pediatric Neurology, China Medical University Children's Hospital, Taichung, Taiwan
- Department of Pediatric Genetics, China Medical University Children's Hospital, Taichung, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, Taichung, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
| | - Che-Chen Lin
- School of Medicine, China Medical University, Taichung, Taiwan
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
| | - Chia-Hung Kao
- Graduate Institute of Clinical Medical Science and School of Medicine, College of Medicine, China Medical University, No. 2, Yuh-Der Road, Taichung, 40447, Taiwan.
- Department of Nuclear Medicine and PET Center, China Medical University Hospital, Taichung, Taiwan.
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Saghazadeh A, Mahmoudi M, Meysamie A, Gharedaghi M, Zamponi GW, Rezaei N. Possible role of trace elements in epilepsy and febrile seizures: a meta-analysis. Nutr Rev 2015; 73:760-79. [DOI: 10.1093/nutrit/nuv026] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Abstract
Over the last years, there has been an increasing interest in the potential association between type 1 diabetes (T1D) and epilepsy. Both T1D and epilepsy are common conditions in children and adolescents, and therefore, their association might represent simply a coincidence or be related to common underlying mechanisms with a potential causal relationship. Few epidemiological studies have been performed in the pediatric population, and they have reached discordant conclusions, with some studies reporting an increased prevalence of epilepsy in children and adolescents with T1D, whereas others have not confirmed this finding. Several mechanisms could explain the occurrence of epilepsy in young people with T1D, such as metabolic abnormalities (hypo/hyperglycemia) and autoantibodies, along with a genetic predisposition and the presence of brain lesions/damage. Further studies are required to better define whether there is a causal relationship between the two conditions and to understand the underlying mechanisms.
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Mantis JG, Meidenbauer JJ, Zimick NC, Centeno NA, Seyfried TN. Glucose reduces the anticonvulsant effects of the ketogenic diet in EL mice. Epilepsy Res 2014; 108:1137-44. [PMID: 24938543 DOI: 10.1016/j.eplepsyres.2014.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 03/14/2014] [Accepted: 05/19/2014] [Indexed: 01/24/2023]
Abstract
The ketogenic diet (KD) is known to be anticonvulsant and anti-epileptogenic. While the mechanism behind this therapeutic benefit is unclear, a reduction of circulating glucose levels through calorie restriction (CR) has been implicated. Foods or drinks that elevate blood glucose are known to compromise the therapeutic benefit of the KD in some children with epilepsy. We therefore evaluated the effect of a calorie restricted KD (KD-R) with supplementation of glucose in the drinking water of EL mice, a natural model of idiopathic generalized epilepsy, prior to seizure testing to assess the effect of glucose on seizure generation. Mice were fed either a standard diet or the KD unrestricted (SD-UR and KD-UR, respectively), or the KD restricted (KD-R). d-Glucose (25 mM) was supplemented in the drinking water of KD-R fed mice for 0.5h or for 2.5h prior to seizure testing. Each restricted mouse served as its own body weight control to achieve a 15-18% body weight reduction. Seizure susceptibility, body weights, and plasma glucose and β-hydroxybutyrate levels were measured over a nine-week treatment period. Body weights and glucose levels remained high over the testing period in both the SD-UR and the KD-UR groups, but were significantly reduced in all R-fed groups. A significant increase in β-hydroxybutyrate levels was observed in all KD groups. Seizure susceptibility remained highest in the SD-UR group, was slightly reduced in the KD-UR group, and was significantly reduced after three weeks in all R-fed groups. Supplementation of glucose prior to seizure testing resulted in a decrease of seizure threshold for R-fed mice, but did not alter bodyweight or circulating glucose levels. The KD has both an anticonvulsant and antiepileptogenic effect in EL mice. Here we confirm that CR enhances the anticonvulsant action of the KD in EL mice. Additionally, we show for the first time that supplementation of glucose decreases the anticonvulsant action of the KD, which further supports the hypothesis that CR works through transitioning metabolism from glucose to ketone utilization for energy.
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Affiliation(s)
- John G Mantis
- Biology Department, Boston College, Chestnut Hill, MA, USA
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Nomura S, Shimakawa S, Miyamoto R, Fukui M, Tamai H. 3-Methyl-1-phenyl-2-pyrazolin-5-one or N-acetylcysteine prevents hippocampal mossy fiber sprouting and rectifies subsequent convulsive susceptibility in a rat model of kainic acid-induced seizure ceased by pentobarbital. Brain Res 2014; 1590:65-74. [PMID: 24854122 DOI: 10.1016/j.brainres.2014.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 04/24/2014] [Accepted: 05/12/2014] [Indexed: 12/17/2022]
Abstract
There is accumulating evidence that reactive oxygen species are involved in the development of seizures under pathological conditions, and antioxidant treatments are a novel therapeutic approach for epilepsy. The kainic acid (KA) model of induced seizures has been widely used to study temporal lobe epilepsy. However, research on the use of free radical scavengers following KA-induced status epilepticus (SE) is limited. We examined whether antioxidants already used in humans could reduce hippocampal neuronal cell loss, mossy fiber sprouting and the acquisition of hyperexcitability when administered as a single dose after SE. The antioxidant 3-methyl-1-phenyl-2-pyrazolin-5-one (edaravone) (30mg/kg) or N-acetylcysteine (NAC) (30mg/kg) was administered after KA-induced SE ceased by pentobarbital. We evaluated neuronal cell viability 1 week after SE, determined the threshold for seizures induced by inhalation of flurothyl ether 12 weeks after SE, and examined the extent of mossy fiber sprouting 12 weeks after SE. We found that edaravone or NAC prevented neuronal cell loss and mossy fiber sprouting, and increased the threshold for seizures induced by flurothyl ether, even when administered after KA-induced SE. These results demonstrate that a single dose of edaravone or NAC can protect against neuronal cell loss and epileptogenesis when administered after SE ceased by pentobarbital.
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Affiliation(s)
- Shohei Nomura
- Department of Pediatrics, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Shuichi Shimakawa
- Department of Pediatrics, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
| | - Ryohei Miyamoto
- Department of Pediatrics, Saiseikai Ibaraki Hospital, 2-1-45 Mitsukeyama, Ibaraki, Osaka 567-0035, Japan
| | - Miho Fukui
- Department of Pediatrics, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Hiroshi Tamai
- Department of Pediatrics, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
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Putta SL, Weisholtz D, Milligan TA. Occipital seizures and subcortical T2 hypointensity in the setting of hyperglycemia. EPILEPSY & BEHAVIOR CASE REPORTS 2014; 2:96-9. [PMID: 25667880 PMCID: PMC4308086 DOI: 10.1016/j.ebcr.2014.01.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 01/07/2014] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Occipital lobe seizures are a recognized manifestation of diabetic nonketotic hyperglycemia, though not as common as focal motor seizures. Occipital lobe white matter T2 hypointensity may suggest this diagnosis. METHODS We present a case of a 66-year-old man with hyperglycemia-related occipital lobe seizures who presented with confusion, intermittent visual hallucinations, and homonymous hemianopia. RESULTS Magnetic resonance imaging showed subcortical T2 hypointensity within the left occipital lobe with adjacent leptomeningeal enhancement. These findings were transient with disappearance in a follow-up MRI. The EEG captured frequent seizures originating in the left occipital region. HbA1c level was 13.4% on presentation, and finger stick blood glucose level was 400 mg/dl. CONCLUSION Hyperglycemia should be considered in the etiology of differential diagnosis of patients with visual abnormalities suspicious for seizures, especially when the MRI shows focal subcortical T2 hypointensity with or without leptomeningeal enhancement.
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Huang LC, Ruge D, Tsai CL, Wu MN, Hsu CY, Lai CL, Liou LM. Isolated aphasic status epilepticus as initial presentation of nonketotic hyperglycemia. Clin EEG Neurosci 2014; 45:126-8. [PMID: 24004489 DOI: 10.1177/1550059413490930] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diagnosis of aphasic status epilepticus is sometimes not easy because of its rarity and electroclinical dissociation. Although most cases are associated with organic brain lesions, nonketotic hyperglycemia (NKH)-related aphasic status epilepticus is rare, especially if it is isolated (without other clinical seizure activity). On the other hand, unlike other metabolic disorders, or hypoglycemia-related generalized seizures, focal motor seizure and epilepsia partialis continua can occur in 25% of NKH, with seizures being the initial manifestation in up to 50% of patients. However, the presentation of epileptic aphasia is rare in NKH patients. We report a rare case of NKH presenting initially as persistent and isolated aphasic status epilepticus. Brain magnetic resonance imaging did not reveal any focal lesion, but ictal electroencephalography (EEG) disclosed left frontotemporal continuous theta to delta waves, intermingled with epileptiform discharges. Correcting the hyperglycemia failed to improve the language disorder, and the seizure was controlled only by the addition of carbamazepine. Patients with NKH may initially present with isolated aphasic status epilepticus. Unlike stroke-related aphasia, accurate diagnosis is difficult if based solely on neurologic examination and brain neuroimaging. Use of EEG and blood sugar determination should be helpful in this special condition.
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Affiliation(s)
- Ling-Chun Huang
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
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Maheandiran M, Mylvaganam S, Wu C, El-Hayek Y, Sugumar S, Hazrati L, del Campo M, Giacca A, Zhang L, Carlen PL. Severe hypoglycemia in a juvenile diabetic rat model: presence and severity of seizures are associated with mortality. PLoS One 2013; 8:e83168. [PMID: 24386156 PMCID: PMC3875447 DOI: 10.1371/journal.pone.0083168] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 10/31/2013] [Indexed: 01/05/2023] Open
Abstract
It is well accepted that insulin-induced hypoglycemia can result in seizures. However, the effects of the seizures, as well as possible treatment strategies, have yet to be elucidated, particularly in juvenile or insulin-dependent diabetes mellitus (IDDM). Here we establish a model of diabetes in young rats, to examine the consequences of severe hypoglycemia in this age group; particularly seizures and mortality. Diabetes was induced in post-weaned 22-day-old Sprague-Dawley rats by streptozotocin (STZ) administered intraperitoneally (IP). Insulin IP (15 U/kg), in rats fasted (14-16 hours), induced hypoglycemia, defined as <3.5 mM blood glucose (BG), in 68% of diabetic (STZ) and 86% of control rats (CON). Seizures occurred in 86% of STZ and all CON rats that reached hypoglycemic levels with mortality only occurring post-seizure. The fasting BG levels were significantly higher in STZ (12.4 ± 1.3 mM) than in CON rodents (6.3 ± 0.3 mM), resulting in earlier onset of hypoglycemia and seizures in the CON group. However, the BG at seizure onset was statistically similar between STZ (1.8 ± 0.2 mM) and CON animals (1.6 ± 0.1 mM) as well as between those that survived (S+S) and those that died (S+M) post-seizure. Despite this, the S+M group underwent a significantly greater number of seizure events than the S+S group. 25% glucose administered at seizure onset and repeated with recurrent seizures was not sufficient to mitigate these continued convulsions. Combining glucose with diazepam and phenytoin significantly decreased post-treatment seizures, but not mortality. Intracranial electroencephalograms (EEGs) were recorded in 10 CON and 9 STZ animals. Predictive EEG changes were not observed in these animals that underwent seizures. Fluorojade staining revealed damaged cells in non-seizing STZ animals and in STZ and CON animals post-seizure. In summary, this model of hypoglycemia and seizures in juvenile diabetic rats provides a paradigm for further study of underlying mechanisms. Our data demonstrate that severe hypoglycemia (<2.0 mM) is a necessary precondition for seizures, and the increased frequency of these seizures is associated with mortality.
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Affiliation(s)
- Margaret Maheandiran
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Shanthini Mylvaganam
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Chiping Wu
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Youssef El-Hayek
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Sonia Sugumar
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Lili Hazrati
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario Canada
| | - Martin del Campo
- Department of Neurology, Toronto Western Hospital, Toronto, Ontario, Canada
| | - Adria Giacca
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Liang Zhang
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Peter L. Carlen
- Toronto Western Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Neurology, Toronto Western Hospital, Toronto, Ontario, Canada
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Rowley S, Patel M. Mitochondrial involvement and oxidative stress in temporal lobe epilepsy. Free Radic Biol Med 2013; 62:121-131. [PMID: 23411150 PMCID: PMC4043127 DOI: 10.1016/j.freeradbiomed.2013.02.002] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 12/17/2012] [Accepted: 12/20/2012] [Indexed: 01/25/2023]
Abstract
A role for mitochondria and oxidative stress is emerging in acquired epilepsies such as temporal lobe epilepsy (TLE). TLE is characterized by chronic unprovoked seizures arising from an inciting insult with a variable seizure-free "latent period." The mechanism by which inciting injury induces chronic epilepsy, known as epileptogenesis, involves multiple cellular, molecular, and physiological changes resulting in altered hyperexcitable circuitry. Whether mitochondrial and redox mechanisms contribute to epileptogenesis remains to be fully clarified. Mitochondrial impairment is revealed in studies from human imaging and tissue analysis from TLE patients. The collective data from animal models suggest that steady-state mitochondrial reactive oxygen species and resultant oxidative damage to cellular macromolecules occur during different phases of epileptogenesis. This review discusses evidence for the role of mitochondria and redox changes occurring in human and experimental TLE. Potential mechanisms by which mitochondrial energetic and redox mechanisms contribute to increased neuronal excitability and therapeutic approaches to target TLE are delineated.
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Affiliation(s)
- Shane Rowley
- Neuroscience Training Program and School of Pharmacy, University of Colorado at Denver, Aurora, CO 80045, USA
| | - Manisha Patel
- Neuroscience Training Program and School of Pharmacy, University of Colorado at Denver, Aurora, CO 80045, USA; Department of Pharmaceutical Sciences, School of Pharmacy, University of Colorado at Denver, Aurora, CO 80045, USA.
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Chachua T, Poon KL, Yum MS, Nesheiwat L, DeSantis K, Velíšková J, Velíšek L. Rapamycin has age-, treatment paradigm-, and model-specific anticonvulsant effects and modulates neuropeptide Y expression in rats. Epilepsia 2012; 53:2015-25. [PMID: 23016669 PMCID: PMC3496841 DOI: 10.1111/j.1528-1167.2012.03674.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE Rapamycin (RAP) has certain antiepileptogenic features. However, it is unclear whether these effects can be explained by the anticonvulsant action of RAP, which has not been studied. To address this question, we tested potential anticonvulsant effects of RAP in immature and adult rats using different seizure models and treatment paradigms. In addition, we studied changes in the expression of neuropeptide Y (NPY) induced by RAP, which may serve as an indirect target of the RAP action. METHODS A complex approach was adopted to evaluate the anticonvulsant potential of RAP: We used flurothyl-, pentylenetetrazole (PTZ)-, N-methyl-D-aspartate (NMDA)-, and kainic acid (KA)-induced seizures to test the effects of RAP using different pretreatment protocols in immature and adult rats. We also evaluated expression of NPY within the primary motor cortex, hippocampal CA1, and dentate gyrus (DG) after different pretreatments with RAP in immature rats. KEY FINDINGS We found the following: (1) RAP administered with short-term pretreatment paradigms has a weak anticonvulsant potential in the seizure models with compromised inhibition. (2) Lack of RAP efficacy correlates with decreased NPY expression in the cortex, CA1, and DG. Specifically in immature rats, a single dose of RAP (3 mg/kg) 4 or 24 h before seizure testing had anticonvulsant effects against PTZ-induced seizures. In the flurothyl seizure model only the 4-h pretreatment with RAP was anticonvulsant in the both age groups. Short-term pretreatments with RAP had no effects against NMDA- and KA-induced seizures tested in immature rats. Long-term pretreatments with RAP over 8 days did not show beneficial effect in all tested seizure models in developing rats. Moreover, the long-term pretreatment with RAP had a slight proconvulsant effect on KA-induced seizures. In immature rats, any lack of anticonvulsant effect (including proconvulsant effect of multiple doses of RAP) was associated with downregulation of NPY expression in the cortex and DG. In immature animals, after a single dose of RAP with 24 h delay, we found a decrease of NPY expression in DG, and CA1 as well. SIGNIFICANCE Our data show weak age-, treatment paradigm-, and model-specific anticonvulsant effects of RAP as well as loss of those effects after long-term RAP pretreatment associated with downregulation of NPY expression. These findings suggest that RAP is a poor anticonvulsant and may have beneficial effects only against epileptogenesis. In addition, our data present new insights into mechanisms of RAP action on seizures indicating a possible connection between mammalian target of rapamycin (mTOR) signaling and NPY system.
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Affiliation(s)
- Tamar Chachua
- Department of Cell Biology & Anatomy, New York Medical College, 40 Sunshine Cottage Rd, Valhalla, NY 10595, U.S.A.
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Fukuda M, Vazquez AL, Zong X, Kim SG. Effects of the α₂-adrenergic receptor agonist dexmedetomidine on neural, vascular and BOLD fMRI responses in the somatosensory cortex. Eur J Neurosci 2012; 37:80-95. [PMID: 23106361 DOI: 10.1111/ejn.12024] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 09/19/2012] [Indexed: 01/20/2023]
Abstract
This article describes the effects of dexmedetomidine (DEX) - the active ingredient of medetomidine, which is the latest popular sedative for functional magnetic resonance imaging (fMRI) in rodents - on multiple unit activity, local field potential (LFP), cerebral blood flow (CBF), pial vessel diameter [indicative of cerebral blood volume (CBV)], and blood oxygenation level-dependent (BOLD) fMRI. These measurements were obtained from the rat somatosensory cortex during 10 s of forepaw stimulation. We found that the continuous intravascular systemic infusion of DEX (50 μg/kg/h, doses typically used in fMRI studies) caused epileptic activities, and that supplemental isoflurane (ISO) administration of ~0.3% helped to suppress the development of epileptic activities and maintained robust neuronal and hemodynamic responses for up to 3 h. Supplemental administration of N(2)O in addition to DEX nearly abolished hemodynamic responses even if neuronal activity remained. Under DEX + ISO anesthesia, spike firing rate and the delta power of LFP increased, whereas beta and gamma power decreased, as compared with ISO-only anesthesia. DEX administration caused pial arteries and veins to constrict nearly equally, resulting in decreases in baseline CBF and CBV. Evoked LFP and CBF responses to forepaw stimulation were largest at a frequency of 8-10 Hz, and a non-linear relationship was observed. Similarly, BOLD fMRI responses measured at 9.4 T were largest at a frequency of 10 Hz. Both pial arteries and veins dilated rapidly (artery, 32.2%; vein, 5.8%), and venous diameter returned to baseline slower than arterial diameter. These results will be useful for designing, conducting and interpreting fMRI experiments under DEX sedation.
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Affiliation(s)
- Mitsuhiro Fukuda
- Neuroimaging Laboratory, Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA.
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Donat A, Guilloton L, Bonnet C, Depreux G, Lamboley JL, Drouet A. [Partial visual seizures induced by non-ketosic hyperglycemia: magnetic resonance imaging and visual evoked potential descriptions. A study of two cases reports with radiologic and electrophysiologic abnormalities]. Rev Neurol (Paris) 2012; 169:154-61. [PMID: 23079857 DOI: 10.1016/j.neurol.2012.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 05/02/2012] [Accepted: 05/30/2012] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Non-ketosic hyperglycemia (NKH) may increase the likelihood of focal epileptic seizures, including commonly motor expression; rarely, they can have a visual expression. METHODS The authors describe the observation of two men, who were hospitalized for visual manifestations; with episodes of homonymous hemianopia and hallucinations, revealing occipital seizure, secondary to NKH. Clinical data and characteristics of the investigations, including radiological imaging (MRI) and electrophysiological results of visual evoked potentials (VEP) are specified. RESULTS MRI showed transitory low signal on T2 and FLAIR in occipital areas. Spectro-MR identified a moderate diminution of the NAA and lipids spikes, compatible with laminar necrosis. VEP revealed a transient decrease of the P100 amplitude. DISCUSSION These two observations underline the existence of acute symptomatic seizures with a visual starting point which is often indicative of diabetes. Through these observations with a review of 28 patients from the literature, MR imaging characteristics and possible anomalies collected on VEP are discussed. Such seizures are resistant to anticonvulsant treatment and respond best to insulin and rehydration. CONCLUSION The visual manifestations indicative of seizures with an occipital starting point in the context of NKH are possible enabling rapid initiation of effective symptomatic treatment with insulin.
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Affiliation(s)
- A Donat
- Service de neurologie, HIA Desgenettes, 108, boulevard Pinel, 69275 Lyon cedex 03, France
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Schauwecker PE. The effects of glycemic control on seizures and seizure-induced excitotoxic cell death. BMC Neurosci 2012; 13:94. [PMID: 22867059 PMCID: PMC3465215 DOI: 10.1186/1471-2202-13-94] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 07/24/2012] [Indexed: 12/20/2022] Open
Abstract
Background Epilepsy is the most common neurological disorder after stroke, affecting more than 50 million persons worldwide. Metabolic disturbances are often associated with epileptic seizures, but the pathogenesis of this relationship is poorly understood. It is known that seizures result in altered glucose metabolism, the reduction of intracellular energy metabolites such as ATP, ADP and phosphocreatine and the accumulation of metabolic intermediates, such as lactate and adenosine. In particular, it has been suggested that the duration and extent of glucose dysregulation may be a predictor of the pathological outcome of status. However, little is known about neither the effects of glycemic control on brain metabolism nor the effects of managing systemic glucose concentrations in epilepsy. Results In this study, we examined glycemic modulation of kainate-induced seizure sensitivity and its neuropathological consequences. To investigate the relationship between glycemic modulation, seizure susceptibility and its neuropathological consequences, C57BL/6 mice (excitotoxin cell death resistant) were subjected to hypoglycemia or hyperglycemia, followed by systemic administration of kainic acid to induce seizures. Glycemic modulation resulted in minimal consequences with regard to seizure severity but increased hippocampal pathology, irrespective of whether mice were hypoglycemic or hyperglycemic prior to kainate administration. Moreover, we found that exogenous administration of glucose following kainic acid seizures significantly reduced the extent of hippocampal pathology in FVB/N mice (excitotoxin cell death susceptible) following systemic administration of kainic acid. Conclusion These findings demonstrate that modulation of the glycemic index can modify the outcome of brain injury in the kainate model of seizure induction. Moreover, modulation of the glycemic index through glucose rescue greatly diminishes the extent of seizure-induced cell death following kainate administration. Our data support the hypothesis that deficient insulin signaling may represent a critical contributing factor in the susceptibility to seizure-induced cell death and this may be an important therapeutic target.
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Affiliation(s)
- Paula Elyse Schauwecker
- Department of Cell and Neurobiology, USC Keck School of Medicine, 1333 San Pablo Street, BMT 403, Los Angeles, CA 90089-9112, USA.
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Diet composition exacerbates or attenuates soman toxicity in rats: implied metabolic control of nerve agent toxicity. Neurotoxicology 2011; 32:342-9. [PMID: 21396400 DOI: 10.1016/j.neuro.2011.03.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 02/03/2011] [Accepted: 03/02/2011] [Indexed: 01/15/2023]
Abstract
To evaluate the role of diet composition on nerve agent toxicity, rats were fed four distinct diets ad libitum for 28 d prior to challenge with 110 μg/kg (1.0 LD(50), sc) soman. The four diets used were a standard rodent diet, a choline-enriched diet, a glucose-enriched diet, and a ketogenic diet. Body weight was recorded throughout the study. Toxic signs and survival were evaluated at key times for up to 72 h following soman exposure. Additionally, acquisition of discriminated shuttlebox avoidance performance was characterized beginning 24h after soman challenge and across the next 8 d (six behavioral sessions). Prior to exposure, body weight was highest in the standard diet group and lowest in the ketogenic diet group. Upon exposure, differences in soman toxicity as a function of diet became apparent within the first hour, with mortality in the glucose-enriched diet group reaching 80% and exceeding all other groups (in which mortality ranged from 0 to 6%). At 72 h after exposure, mortality was 100% in the glucose-enriched diet group, and survival approximated 50% in the standard and choline-enriched diet groups, but equaled 87% in the ketogenic diet group. Body weight loss was significantly reduced in the ketogenic and choline-enriched diet groups, relative to the standard diet group. At 1 and 4h after exposure, rats in the ketogenic diet group had significantly lower toxic sign scores than all other groups. The ketogenic diet group performed significantly better than the standard diet group on two measures of active avoidance performance. The exacerbated soman toxicity observed in the glucose-enriched diet group coupled with the attenuated soman toxicity observed in the ketogenic diet group implicates glucose availability in the toxic effects of soman. This increased glucose availability may enhance acetylcholine synthesis and/or utilization, thereby exacerbating peripheral and central soman toxicity.
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Fletcher P, Pereira A. Visual hallucination of coloured numbers secondary to hyperglycaemia. BMJ Case Rep 2011; 2011:2011/feb09_1/bcr0820103268. [PMID: 22715202 DOI: 10.1136/bcr.08.2010.3268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A 70-year-old Indian woman presented with confusion and visual hallucinations of brightly coloured numbers slowly roving across the right visual field. These hallucinations occurred for a few minutes every few hours. Examination revealed a right homonymous hemianopia. Blood sugar was 37 mmol/l. EEG identified left occipital seizure activity. There was clinical and electrophysiological resolution with normalisation of the hyperglycaemia. There are few cases of hyperglycaemia associated with positive visual phenomena and hemianopia in the literature and this is the first case reported presenting with numerical hallucinations. Hyperglycaemia must be kept on a differential diagnosis list of unusual visual phenomena as it is easily correctable.
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Affiliation(s)
- Phillip Fletcher
- Neurology Department, St George's Hospital, Tooting, London, UK. fl
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Gomes TKDC, Oliveira SLD, Ataíde TDR, Trindade Filho EM. O papel da dieta cetogênica no estresse oxidativo presente na epilepsia experimental. ACTA ACUST UNITED AC 2011. [DOI: 10.1590/s1676-26492011000200005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUÇÃO: A epilepsia é um dos transtornos neurológicos mais comuns, sendo definido como uma condição de crises recorrentes espontâneas. Existe uma importante relação entre radicais livres e enzimas antioxidantes no fenômeno epiléptico, e as espécies reativas de oxigênio (EROs) têm sido implicadas na neurodegeneração induzida pelas crises. OBJETIVO: A presente revisão teve como objetivo investigar a relação existente entre o estresse oxidativo e a epilepsia, destacando o efeito da dieta cetogênica sob condições experimentais. MATERIAL E MÉTODOS: Procedeu-se a pesquisa em artigos científicos publicados nos Bancos de Dados Medline, PubMed, Periódicos CAPES, ScienceDirect e Scielo. As palavras-chave selecionadas para a pesquisa incluíram epilepsia, status epilepticus, pilocarpina, estresse oxidativo, espécies reativas de oxigênio, disfunção mitocondrial. RESULTADOS E DISCUSSÃO: Terapia dietética tem sido utilizada, como é o caso da dieta cetogênica (DC), a qual é rica em lipídeos e pobre em carboidratos e utilizada por mais de oito décadas para o tratamento de epilepsia refratária, principalmente em crianças. A DC modula a bionergética mitocondrial, diminui a formação de EROs, aumenta a capacidade antioxidante celular e ainda, previne alterações do DNA mitocondrial. CONCLUSÃO: Evidências de atuação da DC na disfunção mitocondrial, como ocorre na epilepsia, são muitas e demonstram claramente efeitos benéficos dessa terapêutica.
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Lee KH, Park JH, Won R, Lee H, Nam TS, Lee BH. Inhibition of hexokinase leads to neuroprotection against excitotoxicity in organotypic hippocampal slice culture. J Neurosci Res 2010; 89:96-107. [DOI: 10.1002/jnr.22525] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Wu YJ, Tsai JJ, Huang CW. Nonketotic hyperglycemia-related reflex epileptic seizures induced by Mah-Jong playing. Epilepsy Behav 2010; 19:533-5. [PMID: 20934919 DOI: 10.1016/j.yebeh.2010.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 08/31/2010] [Accepted: 09/03/2010] [Indexed: 10/19/2022]
Abstract
Seizures related to nonketotic hyperglycemia (NKH) are often encountered in clinical practice. Among such seizures, reflex seizures are rare, and most of them are movement-induced focal seizures. We describe five patients with NKH and reflex seizures induced exclusively by playing Mah-Jong, a traditional and popular game in Chinese society. Four patients had partial seizures and one had a generalized seizure. All the patients manifested NKH on occurrence of the seizure. During Mah-Jong in the presence of NKH, seizures could arise from the frontal and temporal lobes, which are highly activated during the game. Both avoidance of Mah-Jong playing and control of glucose intake help prevent this disorder.
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Affiliation(s)
- Yi-Jen Wu
- Department of Neurology, National Cheng Kung University Hospital, Tainan, Taiwan
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Hung WL, Hsieh PF, Lee YC, Chang MH. Occipital lobe seizures related to marked elevation of hemoglobin A1C: report of two cases. Seizure 2010; 19:359-62. [PMID: 20558093 DOI: 10.1016/j.seizure.2010.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 01/26/2010] [Accepted: 05/20/2010] [Indexed: 11/18/2022] Open
Abstract
Occipital lobe seizures caused by nonketotic hyperglycemia (NKH) have been reported in only a few cases and are not fully characterized. We report two cases of NKH-related occipital lobe seizures with high hemoglobin A1C (HbA1C), epileptiform electroencephalograph (EEG) and MRI abnormalities. Both patients had moderate hyperglycemia (310-372 mg/dl) and mildly elevated serum osmolarity (295-304 mOsm/kg) but markedly elevated HbA1C (13.8-14.4%). One patient had a clinico-EEG seizure originating from the right occipital region during sleep. The other patient had an interictal epileptiform discharge consisting of unilateral occipital beta activity in sleep. None of the previously reported cases fulfilled the criteria of a nonketotic hyperglycemic hyperosmolar (NKHH) state, or showed any interictal beta paroxysms, spikes, sharp waves, or spike/sharp-slow wave complexes. We suggest that prolonged exposure to uncontrolled hyperglycemia, as indicated by HbA1C, rather than an acute NKHH state is crucial in the development of this peculiar seizure. We also suggest clinicians look for the presence of interictal focal beta paroxysms in addition to the usual epileptiform discharges while reading the EEG of these patients.
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Affiliation(s)
- Wan-Ling Hung
- Division of Neurology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, ROC
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Gasior M, Yankura J, Hartman AL, French A, Rogawski MA. Anticonvulsant and proconvulsant actions of 2-deoxy-D-glucose. Epilepsia 2010; 51:1385-94. [PMID: 20491877 DOI: 10.1111/j.1528-1167.2010.02593.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE 2-Deoxy-D-glucose (2-DG), a glucose analog that accumulates in cells and interferes with carbohydrate metabolism by inhibiting glycolytic enzymes, has anticonvulsant actions. Recognizing that severe glucose deprivation can induce seizures, we sought to determine whether acute treatment with 2-DG can promote seizure susceptibility by assessing its effects on seizure threshold. For comparison, we studied 3-methyl-glucose (3-MG), which like 2-DG accumulates in cells and reduces glucose uptake, but does not inhibit glycolysis. METHODS Mice were treated with 2-DG or 3-MG and the seizure threshold determined in the 6-Hz test, the mouse electroshock seizure threshold (MEST) test, and the intravenous pentylenetetrazol (i.v. PTZ) or kainic acid (i.v. KA) seizure threshold tests. 2-DG was also tested in fully amygdala-kindled rats. RESULTS 2-DG (125-500 mg/kg, i.p., 30 min before testing) significantly elevated the seizure threshold in the 6-Hz seizure test. 2-DG (250-500 mg/kg) decreased the threshold in the MEST and i.v. PTZ and i.v. KA tests. 3-MG had no effect on seizure threshold in the 6-Hz test but, like 2-DG, decreased seizure threshold in the i.v. PTZ test. 2-DG (250 and 500 mg/kg, i.p., 30 min before testing) had no effect on amygdala-kindled seizures. CONCLUSIONS Although 2-DG protects against seizures in the 6-Hz seizure test, it promotes seizures in some other models. The proconvulsant action may relate to reduced glucose uptake, whereas the anticonvulsant action may require inhibition of glycolysis and shunting of glucose metabolism through the pentose phosphate pathway.
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Affiliation(s)
- Maciej Gasior
- Epilepsy Research Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
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Hartman AL, Zheng X, Bergbower E, Kennedy M, Hardwick JM. Seizure tests distinguish intermittent fasting from the ketogenic diet. Epilepsia 2010; 51:1395-402. [PMID: 20477852 DOI: 10.1111/j.1528-1167.2010.02577.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE Calorie restriction can be anticonvulsant in animal models. The ketogenic diet was designed to mimic calorie restriction and has been assumed to work by the same mechanisms. We challenged this assumption by profiling the effects of these dietary regimens in mice subjected to a battery of acute seizure tests. METHODS Juvenile male NIH Swiss mice received ketogenic diet or a normal diet fed in restricted quantities (continuously or intermittently) for ∼12 days, starting at 3-4 weeks of age. Seizures were induced by the 6 Hz test, kainic acid, maximal electroshock, or pentylenetetrazol. RESULTS The ketogenic and calorie-restricted diets often had opposite effects depending on the seizure test. The ketogenic diet protected from 6 Hz-induced seizures, whereas calorie restriction (daily and intermittent) increased seizure activity. Conversely, calorie restriction protected juvenile mice against seizures induced by kainic acid, whereas the ketogenic diet failed to protect. Intermittent caloric restriction worsened seizures induced by maximal electroshock but had no effect on those induced by pentylenetetrazol. DISCUSSION In contrast to a longstanding hypothesis, calorie restriction and the ketogenic diet differ in their acute seizure test profiles, suggesting that they have different underlying anticonvulsant mechanisms. These findings highlight the importance of the 6 Hz test and its ability to reflect the benefits of ketosis and fat consumption.
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Affiliation(s)
- Adam L Hartman
- Department of Neurology, Johns Hopkins Medicine, Baltimore, Maryland 21205, USA.
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ATP-sensitive potassium channels contribute to the time-dependent alteration in the pentylenetetrazole-induced seizure threshold in diabetic mice. Seizure 2010; 19:53-8. [DOI: 10.1016/j.seizure.2009.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Revised: 11/10/2009] [Accepted: 11/13/2009] [Indexed: 01/29/2023] Open
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