1
|
Muller Guzzo EF, Rosa G, Lourenço de Lima AMD, Padilha R, Coitinho A. Piroxicam reduced the intensity of epileptic seizures in a kindling seizure model. Neurol Res 2024; 46:717-726. [PMID: 38679045 DOI: 10.1080/01616412.2024.2345032] [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: 10/20/2023] [Accepted: 04/13/2024] [Indexed: 05/01/2024]
Abstract
Introduction: The close relationship between inflammatory processes and epileptic seizures is already known, although the exact pathophysiological mechanism is unclear. In this study, the anticonvulsant capacity of piroxicam, an anti-inflammatory drug, was evaluated. A rat pentylenetetrazole kindling model was used.Methods: Male Wistar rats, 8-9 weeks old, received piroxicam (0.15 and 0.30 mg/kg), diazepam (2 mg/kg) or saline for 14 days, and PTZ, on alternate days. Intraperitoneal was chosen as the route of administration. The intensity of epileptic seizures was assessed using a modified Racine scale. The open field test and object recognition analysis were performed at the beginning of the study to ensure the safety of the drugs used. At the end of the protocol, the animals were euthanized to measure the levels of inflammatory (TNF-a and IL-6) and anti-inflammatory (IL-10) cytokines in the cortex, hippocampus, and serum.Results:There were no changes in the open field test and object recognition analysis. Piroxicam was found to decrease Racine scale scores at both concentrations. The reported values for IL-6 levels remained steady in all structures, whereas the TNF-alpha level in the cortex was higher in animals treated with piroxicam than in the saline and diazepam subjects. Finally, animals treated with the anti-inflammatory drug presented reduced IL-10 levels in the cortex and hippocampus.onclusions: Using inflammation as a guiding principle, the anticonvulsant effect of PIRO could be associated with the hippocampal circuits, since this structure showed no increase in inflammatory cytokines.
Collapse
Affiliation(s)
| | - Gabriel Rosa
- Postgraduate Program in Physiology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Rafael Padilha
- Postgraduate Program in Physiology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Adriana Coitinho
- Microbiology, Immunology and Parasitology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
2
|
Park KI. Understanding epileptogenesis from molecules to network alteration. ENCEPHALITIS 2024; 4:47-54. [PMID: 38886161 PMCID: PMC11237188 DOI: 10.47936/encephalitis.2024.00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 05/14/2024] [Indexed: 06/20/2024] Open
Abstract
Epilepsy is characterized by recurrent seizures. Following an initial insult, a latent period precedes the onset of spontaneous seizures, a process referred to as epileptogenesis. This period plays a critical role in halting the progression toward epilepsy before the onset of abnormal molecular and network alterations. In this study, the fundamental concepts of epileptogenesis as well as the associated molecular and cellular targets are reviewed.
Collapse
Affiliation(s)
- Kyung-Il Park
- Department of Neurology, Seoul National University Hospital Healthcare System Gangnam Center, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
3
|
Bersani I, Lapergola G, Patacchiola R, D'Adamo E, Stuppia L, de Laurenzi V, Damiani V, Cataldo I, Clemente K, Primavera A, Salomone R, Barbante E, Campi F, Savarese I, Ronci S, Dotta A, Braguglia A, Longo D, Gavilanes DAW, Gazzolo F, Serpero L, Strozzi MC, Maconi A, Cassinari M, Libener R, Gazzolo D. Elevated S100B urine levels predict seizures in infants complicated by perinatal asphyxia and undergoing therapeutic hypothermia. Clin Chem Lab Med 2024; 62:1109-1117. [PMID: 38290722 DOI: 10.1515/cclm-2023-1471] [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: 12/19/2023] [Accepted: 01/23/2024] [Indexed: 02/01/2024]
Abstract
OBJECTIVES Seizures (SZ) are one of the main complications occurring in infants undergoing therapeutic hypothermia (TH) due to perinatal asphyxia (PA) and hypoxic ischemic encephalopathy (HIE). Phenobarbital (PB) is the first-line therapeutic strategy, although data on its potential side-effects need elucidation. We investigated whether: i) PB administration in PA-HIE TH-treated infants affects S100B urine levels, and ii) S100B could be a reliable early predictor of SZ. METHODS We performed a prospective case-control study in 88 PA-HIE TH infants, complicated (n=44) or not (n=44) by SZ requiring PB treatment. S100B urine levels were measured at 11 predetermined monitoring time-points from first void up to 96-h from birth. Standard-of-care monitoring parameters were also recorded. RESULTS S100B significantly increased in the first 24-h independently from HIE severity in the cases who later developed SZ and requested PB treatment. ROC curve analysis showed that S100B, as SZ predictor, at a cut-off of 2.78 μg/L achieved a sensitivity/specificity of 63 and 84 %, positive/negative predictive values of 83 and 64 %. CONCLUSIONS The present results offer additional support to the usefulness of S100B as a trustable diagnostic tool in the clinical daily monitoring of therapeutic and pharmacological procedures in infants complicated by PA-HIE.
Collapse
Affiliation(s)
- Iliana Bersani
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Giuseppe Lapergola
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Roberta Patacchiola
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Ebe D'Adamo
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Liborio Stuppia
- Center for Advances Studies and Technology (CAST), G. d'Annunzio University, Chieti, Italy
| | - Vincenzo de Laurenzi
- Center for Advances Studies and Technology (CAST), G. d'Annunzio University, Chieti, Italy
| | - Verena Damiani
- Center for Advances Studies and Technology (CAST), G. d'Annunzio University, Chieti, Italy
| | - Ivana Cataldo
- Laboratory of Clinical Pathology, SS Annunziata Hospital, Chieti, Italy
| | - Katia Clemente
- Laboratory of Clinical Pathology, SS Annunziata Hospital, Chieti, Italy
| | - Adele Primavera
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Rita Salomone
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Elisabetta Barbante
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| | - Francesca Campi
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Immacolata Savarese
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Sara Ronci
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Andrea Dotta
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Annabella Braguglia
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Daniela Longo
- Department of Neonatology, Neonatal Intensive Care Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - Danilo A W Gavilanes
- Department of Pediatrics and Neonatology, Maastricht University, Maastricht, The Netherlands
| | | | - Laura Serpero
- Department of Maternal, Fetal and Neonatal Medicine, SS Antonio, Biagio and C. Arrigo Hospital, Alessandria, Italy
| | - Maria Chiara Strozzi
- Department of Pediatrics and Neonatology, Ospedale Cardinal Massaia, Asti, Italy
| | - Antonio Maconi
- Social Security Administration Development and Promotion of Scientific Research Unit, SS Antonio, Biagio and C. Arrigo Hospital, Alessandria, Italy
| | - Maurizio Cassinari
- Department of Clinical Biochemistry, Transfusion and Regeneration Medicine Alessandria Hospital, Alessandria, Italy
| | - Roberta Libener
- Department of Clinical Biochemistry, Transfusion and Regeneration Medicine Alessandria Hospital, Alessandria, Italy
| | - Diego Gazzolo
- Neonatal Intensive Care Unit, G. d'Annunzio University of Chieti, Chieti, Italy
| |
Collapse
|
4
|
Ménétré E, De Stefano P, Megevand P, Sarasin FP, Vargas MI, Kleinschmidt A, Vulliemoz S, Picard F, Seeck M. Antiseizure medication ≤48 hours portends better prognosis in new-onset epilepsy. Eur J Neurol 2024; 31:e16107. [PMID: 37889889 PMCID: PMC11236038 DOI: 10.1111/ene.16107] [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: 02/03/2023] [Revised: 07/28/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023]
Abstract
BACKGROUND Several studies found that patients with new-onset epilepsy (NOE) have higher seizure recurrence rates if they presented already prior seizures. These observations suggest that timing of antiseizure medication (ASM) is crucial and should be offered immediately after the first seizure. Here, we wanted to assess whether immediate ASM is associated with improved outcome. METHODS Single-center study of 1010 patients (≥16 years) who presented with a possible first seizure in the emergency department between 1 March 2010 and 1 March 2017. A comprehensive workup was launched upon arrival, including routine electroencephalography (EEG), brain computed tomography/magnetic resonance imaging, long-term overnight EEG and specialized consultations. We followed patients for 5 years comparing the relapse rate in patients treated within 48 h to those with treatment >48 h. RESULTS A total of 487 patients were diagnosed with NOE. Of the 416 patients (162 female, age: 54.6 ± 21.1 years) for whom the treatment start could be retrieved, 80% (333/416) were treated within 48 h. The recurrence rate after immediate treatment (32%; 107/333) was significantly lower than in patients treated later (56.6%; 47/83; p < 0.001). For patients for whom a complete 5-year-follow-up was available (N = 297, 123 female), those treated ≤48 h (N = 228; 76.8%) had a significantly higher chance of remaining seizure-free compared with patients treated later (N = 69; 23.2%; p < 0.001). CONCLUSIONS In this retrospective study, immediate ASM therapy (i.e., within 48 h) was associated with better prognosis up to 5 years after the index event. Prospective studies are required to determine the value of immediate workup and drug therapy in NOE patients.
Collapse
Affiliation(s)
- Eric Ménétré
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| | - Pia De Stefano
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
- Neuro‐Critical Care Unit, Department of Intensive CareUniversity Hospitals of GenevaGenevaSwitzerland
| | - Pierre Megevand
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| | - François P. Sarasin
- Division of Emergency Medicine, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency MedicineUniversity of Geneva Hospitals and Faculty of MedicineGenevaSwitzerland
| | - Maria I. Vargas
- Neuroradiology DepartmentUniversity Hospitals of GenevaGenevaSwitzerland
| | - Andreas Kleinschmidt
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| | - Serge Vulliemoz
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| | - Fabienne Picard
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| | - Margitta Seeck
- EEG & Epilepsy Unit, Department of Clinical NeurosciencesUniversity Hospitals of GenevaGenevaSwitzerland
| |
Collapse
|
5
|
DePaula-Silva AB. The Contribution of Microglia and Brain-Infiltrating Macrophages to the Pathogenesis of Neuroinflammatory and Neurodegenerative Diseases during TMEV Infection of the Central Nervous System. Viruses 2024; 16:119. [PMID: 38257819 PMCID: PMC10819099 DOI: 10.3390/v16010119] [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: 12/05/2023] [Revised: 01/06/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
The infection of the central nervous system (CNS) with neurotropic viruses induces neuroinflammation and is associated with the development of neuroinflammatory and neurodegenerative diseases, including multiple sclerosis and epilepsy. The activation of the innate and adaptive immune response, including microglial, macrophages, and T and B cells, while required for efficient viral control within the CNS, is also associated with neuropathology. Under healthy conditions, resident microglia play a pivotal role in maintaining CNS homeostasis. However, during pathological events, such as CNS viral infection, microglia become reactive, and immune cells from the periphery infiltrate into the brain, disrupting CNS homeostasis and contributing to disease development. Theiler's murine encephalomyelitis virus (TMEV), a neurotropic picornavirus, is used in two distinct mouse models: TMEV-induced demyelination disease (TMEV-IDD) and TMEV-induced seizures, representing mouse models of multiple sclerosis and epilepsy, respectively. These murine models have contributed substantially to our understanding of the pathophysiology of MS and seizures/epilepsy following viral infection, serving as critical tools for identifying pharmacological targetable pathways to modulate disease development. This review aims to discuss the host-pathogen interaction during a neurotropic picornavirus infection and to shed light on our current understanding of the multifaceted roles played by microglia and macrophages in the context of these two complexes viral-induced disease.
Collapse
Affiliation(s)
- Ana Beatriz DePaula-Silva
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT 84112, USA
| |
Collapse
|
6
|
Löscher W, Howe CL. Molecular Mechanisms in the Genesis of Seizures and Epilepsy Associated With Viral Infection. Front Mol Neurosci 2022; 15:870868. [PMID: 35615063 PMCID: PMC9125338 DOI: 10.3389/fnmol.2022.870868] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/05/2022] [Indexed: 12/16/2022] Open
Abstract
Seizures are a common presenting symptom during viral infections of the central nervous system (CNS) and can occur during the initial phase of infection ("early" or acute symptomatic seizures), after recovery ("late" or spontaneous seizures, indicating the development of acquired epilepsy), or both. The development of acute and delayed seizures may have shared as well as unique pathogenic mechanisms and prognostic implications. Based on an extensive review of the literature, we present an overview of viruses that are associated with early and late seizures in humans. We then describe potential pathophysiologic mechanisms underlying ictogenesis and epileptogenesis, including routes of neuroinvasion, viral control and clearance, systemic inflammation, alterations of the blood-brain barrier, neuroinflammation, and inflammation-induced molecular reorganization of synapses and neural circuits. We provide clinical and animal model findings to highlight commonalities and differences in these processes across various neurotropic or neuropathogenic viruses, including herpesviruses, SARS-CoV-2, flaviviruses, and picornaviruses. In addition, we extensively review the literature regarding Theiler's murine encephalomyelitis virus (TMEV). This picornavirus, although not pathogenic for humans, is possibly the best-characterized model for understanding the molecular mechanisms that drive seizures, epilepsy, and hippocampal damage during viral infection. An enhanced understanding of these mechanisms derived from the TMEV model may lead to novel therapeutic interventions that interfere with ictogenesis and epileptogenesis, even within non-infectious contexts.
Collapse
Affiliation(s)
- Wolfgang Löscher
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
| | - Charles L. Howe
- Division of Experimental Neurology, Department of Neurology, Mayo Clinic, Rochester, MN, United States
- Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, United States
| |
Collapse
|
7
|
Alvi AM, Shah FA, Muhammad AJ, Feng J, Li S. 1,3,4, Oxadiazole Compound A3 Provides Robust Protection Against PTZ-Induced Neuroinflammation and Oxidative Stress by Regulating Nrf2-Pathway. J Inflamm Res 2022; 14:7393-7409. [PMID: 35002275 PMCID: PMC8721032 DOI: 10.2147/jir.s333451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/17/2021] [Indexed: 12/14/2022] Open
Abstract
Background Epilepsy is a common neurological disorder that is characterized by recurrent episodes of seizures. Various studies have demonstrated a direct association between oxidative stress and inflammation in several neurological disorders including epilepsy. This study aimed to investigate the neuroprotective effects of a synthetic 1,3,4, oxadiazole compound A3 against pentylenetetrazole (PTZ)-induced kindling and seizure model. Methodology PTZ was administered in a sub-convulsive dose of 40 mg/kg for 15 days, at 48-hour intervals to male Swiss-Albino mice until animals were fully kindled. Two different doses of A3 (10 mg/kg and 30 mg/kg) were administered to find out the effective dose of A3 and to further demonstrate the relative role of nuclear factor E2-related factor (Nrf2) in the PTZ-induced kindled model. Results Our results demonstrated a compromised antioxidant capacity associated with a low level of catalase (CAT), superoxide dismutase (SOD), glutathione (GST), and glutathione S-transferase (GSH) in the kindled group. However, the PTZ-induced group demonstrated an elevated level of lipid peroxidation (LPO) level parallel to pro-inflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), mediators as cyclooxygenase (COX-2), and nuclear factor kappa B (NFκB). Furthermore, the A3 treatment reversed these changes and overexpressed the antioxidant Nrf2 gene and its downstream HO-1. To further investigate the involvement of Nrf2, we employed an Nrf2-inhibitor, ie, all-trans retinoic acid (ATRA), that further aggravated the PTZ toxicity. Moreover, vascular endothelial growth factor (VEGF) expression was evaluated to assess the extent of BBB disruption. Conclusion The findings of this study suggest that A3 could mediate neuroprotection possibly by activating Nrf2 dependent downregulation of inflammatory cascades.
Collapse
Affiliation(s)
- Arooj Mohsin Alvi
- Department of Neonatology, Shenzhen Children's Hospital Shenzhen, Shenzhen, People's Republic of China.,Department of Pharmacology, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Fawad Ali Shah
- Department of Pharmacology, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Asmaa Jan Muhammad
- Department of Pharmacology, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Jinxing Feng
- Department of Neonatology, Shenzhen Children's Hospital Shenzhen, Shenzhen, People's Republic of China
| | - Shupeng Li
- State Key Laboratory of Oncogenomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, People's Republic of China
| |
Collapse
|
8
|
Hussain A, Rafeeq H, Munir N, Jabeen Z, Afsheen N, Rehman KU, Bilal M, Iqbal HMN. Dendritic Cell-Targeted Therapies to Treat Neurological Disorders. Mol Neurobiol 2022; 59:603-619. [PMID: 34743292 DOI: 10.1007/s12035-021-02622-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/26/2021] [Indexed: 02/08/2023]
Abstract
Dendritic cells (DCs) are the immune system's highly specialized antigen-presenting cells. When DCs are sluggish and mature, self-antigen presentation results in tolerance; however, when pathogen-associated molecular patterns stimulate mature DCs, antigen presentation results in the development of antigen-specific immunity. DCs have been identified in various vital organs of mammals (e.g., the skin, heart, lungs, intestines, and spleen), but the brain has long been thought to be devoid of DCs in the absence of neuroinflammation. However, neuroinflammation is becoming more recognized as a factor in a variety of brain illnesses. DCs are present in the brain parenchyma in trace amounts under healthy circumstances, but their numbers rise during neuroinflammation. New therapeutics are being developed that can reduce dendritic cell immunogenicity by inhibiting pro-inflammatory cytokine production and T cell co-stimulatory pathways. Additionally, innovative ways of regulating dendritic cell growth and differentiation and harnessing their tolerogenic capability are being explored. Herein, we described the function of dendritic cells in neurological disorders and discussed the potential for future therapeutic techniques that target dendritic cells and dendritic cell-related targets in the treatment of neurological disorders.
Collapse
Affiliation(s)
- Asim Hussain
- Department of Biochemistry, Riphah International University, Faisalabad, 38040, Pakistan
| | - Hamza Rafeeq
- Department of Biochemistry, Riphah International University, Faisalabad, 38040, Pakistan
| | - Nimra Munir
- Department of Biochemistry, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Zara Jabeen
- Department of Biochemistry, Riphah International University, Faisalabad, 38040, Pakistan
| | - Nadia Afsheen
- Department of Biochemistry, Riphah International University, Faisalabad, 38040, Pakistan
| | - Khalil Ur Rehman
- Department of Biochemistry, Riphah International University, Faisalabad, 38040, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, 64849, Monterrey, Mexico.
| |
Collapse
|
9
|
Yu L, Yang J, Yu W, Cao J, Li X. Rhein attenuates PTZ‑induced epilepsy and exerts neuroprotective activity via inhibition of the TLR4-NFκB signaling pathway. Neurosci Lett 2021; 758:136002. [PMID: 34090938 DOI: 10.1016/j.neulet.2021.136002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND Epilepsy is a common neurological disease that cannot be well controlled by existing antiepileptic drugs. Studies have implicated oxidative stress and inflammation in the pathophysiology of epilepsy. Rhein has a comprehensive pharmacological function in reducing inflammation and can play a neuroprotective role in many neurological diseases, however little is known about its effects on epilepsy. METHODS A model of acute epilepsy in mice was established using the Pentylenetetrazol (PTZ) ignition method to evaluate the effects of Rhein on the duration and latency of convulsions, and the number and severity of seizures. Modified Neurological Severity Score (mNSS), Rotarod and open-field behavioral task tests were performed to evaluate the neuroprotective effect of Rhein. TUNEL staining was used to assess neuronal damage, and western blot, qPCR and ELISA kits were utilized to determine the expression of inflammatory signaling protein molecules and levels of inflammatory cytokines. RESULTS In this study, we demonstrate that Rhein delayed the onset of seizures, decreased their severity, and reduced the duration and frequency of seizures in PTZ-induced epileptic mice. Furthermore, we found that Rhein blocked neurological deficits induced by PTZ. In addition, our results show that Rhein inhibited the activation of the TLR4-NFκB signaling pathway and decreased the secretion of the inflammatory cytokines TNF-α, IL-6, IL-1β, and IL-18. CONCLUSION Our results suggest that the anticonvulsant and neuroprotective effects of Rhein are achieved by disrupting the processes involved in PTZ acquisition of epilepsy.
Collapse
Affiliation(s)
- Lei Yu
- Department of Basic Medicine, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Jiping Yang
- Institute of Basic Medical Sciences, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Wei Yu
- Department of Basic Medicine, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Jian Cao
- Department of Basic Medicine, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xueping Li
- Department of Basic Medicine, Xi'an Medical University, Xi'an, Shaanxi, China.
| |
Collapse
|
10
|
Chen L, Wang Y, Chen Z. Adult Neurogenesis in Epileptogenesis: An Update for Preclinical Finding and Potential Clinical Translation. Curr Neuropharmacol 2021; 18:464-484. [PMID: 31744451 PMCID: PMC7457402 DOI: 10.2174/1570159x17666191118142314] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 10/31/2019] [Accepted: 11/18/2019] [Indexed: 12/22/2022] Open
Abstract
Epileptogenesis refers to the process in which a normal brain becomes epileptic, and is characterized by hypersynchronous spontaneous recurrent seizures involving a complex epileptogenic network. Current available pharmacological treatment of epilepsy is generally symptomatic in controlling seizures but is not disease-modifying in epileptogenesis. Cumulative evidence suggests that adult neurogenesis, specifically in the subgranular zone of the hippocampal dentate gyrus, is crucial in epileptogenesis. In this review, we describe the pathological changes that occur in adult neurogenesis in the epileptic brain and how adult neurogenesis is involved in epileptogenesis through different interventions. This is followed by a discussion of some of the molecular signaling pathways involved in regulating adult neurogenesis, which could be potential druggable targets for epileptogenesis. Finally, we provide perspectives on some possible research directions for future studies.
Collapse
Affiliation(s)
- Liying Chen
- Institute of Pharmacology & Toxicology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yi Wang
- Institute of Pharmacology & Toxicology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,Epilepsy Center, Department of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhong Chen
- Institute of Pharmacology & Toxicology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,Epilepsy Center, Department of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| |
Collapse
|
11
|
Kavaye Kandeda A, Okomolo Moto FC, Omam Omam JP, Mbomo Ayissi RE, Ojong L, Ngo Bum E. Pergularia daemia alters epileptogenesis and attenuates cognitive impairment in kainate-treated mice: Insight into anti-inflammatory mechanisms. Epilepsy Behav 2021; 115:107707. [PMID: 33429138 DOI: 10.1016/j.yebeh.2020.107707] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/21/2020] [Accepted: 12/12/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND About 60% of temporal lobe epilepsies are drug resistant. Thus, medicinal plants are sources of new antiepileptic drugs. Pergularia daemia is used in Cameroon to treat pain, fever, arthritis, infections, and temporal lobe epilepsy. However, there are no scientific reports on the anti-inflammatory activity of P. daemia during epileptogenesis. OBJECTIVE This study aimed at determining the involvement of the anti-inflammatory activity of P. daemia during epileptogenesis in kainate-treated mice. METHODS Status epilepticus was induced in mice with kainate (15 mg/kg; i.p.). Those developing status epilepticus for 2 h were divided and treated once daily, for two weeks, with distilled water (10 ml/kg; p.o.), P. daemia extract (4.9, 12.3, 24.5, and 49 mg/kg; p.o.), and sodium valproate (300 mg/kg; i.p.) or aspirin (20 mg/kg; i.p.). One hour following the last treatment, the susceptibility of mice to seizures was assessed during epileptogenesis with pentylenetetrazole (40 mg/kg; i.p.). Then, mice were subjected to morris water maze, object recognition, and open-field tests. After completion of behavioral analysis, hippocampi and blood were collected for pro-inflammatory markers or histological analysis. RESULTS The extract of P. daemia at all doses significantly reduced the latency and duration of seizures and increased seizure score. P. daemia (24.5 and 49 mg/kg) also prevented SE-induced cognitive impairment. Furthermore, the extract (24.5 and 49 mg/kg) markedly decreased tumor necrosis factor-α, interleukins-1β, and -6 levels in hippocampi or serum. Histological analysis revealed that P. daemia attenuated neuronal loss in CA1 and CA3 areas of the hippocampus. CONCLUSIONS These findings suggest that anti-inflammatory mechanisms are involved in the antiepileptogenic effect of P. daemia extract. This justifies therefore its use to treat epilepsy and inflammation in Cameroon traditional folk medicine.
Collapse
Affiliation(s)
- Antoine Kavaye Kandeda
- Department of Animal Biology and Physiology, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.
| | - Fleur Clarisse Okomolo Moto
- Department of Biological Sciences, Higher Teachers Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon.
| | - Jean Pierre Omam Omam
- Department of Biological Sciences, Higher Teachers Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon.
| | - Rigobert Espoir Mbomo Ayissi
- Department of Biological Sciences, Higher Teachers Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon.
| | - Lucie Ojong
- Center of Medical Research, Institute of Medical Research and Medicinal Plant Studies, P.O. Box 6163, Yaoundé, Cameroon.
| | - Elisabeth Ngo Bum
- Department of Biological Sciences, Faculty of Science, University of Maroua, P.O. Box 52, Maroua, Cameroon.
| |
Collapse
|
12
|
Kim YS, Choi J, Yoon BE. Neuron-Glia Interactions in Neurodevelopmental Disorders. Cells 2020; 9:cells9102176. [PMID: 32992620 PMCID: PMC7601502 DOI: 10.3390/cells9102176] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/24/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022] Open
Abstract
Recent studies have revealed synaptic dysfunction to be a hallmark of various psychiatric diseases, and that glial cells participate in synapse formation, development, and plasticity. Glial cells contribute to neuroinflammation and synaptic homeostasis, the latter being essential for maintaining the physiological function of the central nervous system (CNS). In particular, glial cells undergo gliotransmission and regulate neuronal activity in tripartite synapses via ion channels (gap junction hemichannel, volume regulated anion channel, and bestrophin-1), receptors (for neurotransmitters and cytokines), or transporters (GLT-1, GLAST, and GATs) that are expressed on glial cell membranes. In this review, we propose that dysfunction in neuron-glia interactions may contribute to the pathogenesis of neurodevelopmental disorders. Understanding the mechanisms of neuron-glia interaction for synapse formation and maturation will contribute to the development of novel therapeutic targets of neurodevelopmental disorders.
Collapse
Affiliation(s)
- Yoo Sung Kim
- Department of Molecular Biology, Dankook University, Cheonan 31116, Korea; (Y.S.K.); (J.C.)
| | - Juwon Choi
- Department of Molecular Biology, Dankook University, Cheonan 31116, Korea; (Y.S.K.); (J.C.)
| | - Bo-Eun Yoon
- Department of Molecular Biology, Dankook University, Cheonan 31116, Korea; (Y.S.K.); (J.C.)
- Department of Nanobiomedical science, Dankook University, Cheonan 31116, Korea
- Correspondence: ; Tel.: +82-41-529-6085
| |
Collapse
|
13
|
Mukhtar I. Inflammatory and immune mechanisms underlying epileptogenesis and epilepsy: From pathogenesis to treatment target. Seizure 2020; 82:65-79. [PMID: 33011590 DOI: 10.1016/j.seizure.2020.09.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 02/06/2023] Open
Abstract
Epilepsy is a brain disease associated with epileptic seizures as well as with neurobehavioral outcomes of this condition. In the last century, inflammation emerged as a crucial factor in epilepsy etiology. Various brain insults through activation of neuronal and non-neuronal brain cells initiate a series of inflammatory events. Growing observations strongly suggest that abnormal activation of critical inflammatory processes contributes to epileptogenesis, a gradual process by which a normal brain transforms into the epileptic brain. Increased knowledge of inflammatory pathways in epileptogenesis has unveiled mechanistic targets for novel antiepileptic therapies. Molecules specifically targeting the pivotal inflammatory pathways may serve as promising candidates to halt the development of epilepsy. The present paper reviews the pieces of evidence conceptually supporting the potential role of inflammatory mechanisms and the relevant blood-brain barrier (BBB) disruption in epileptogenesis. Also, it discusses the mechanisms underlying inflammation-induced neuronal-glial network impairment and highlights innovative neuroregulatory actions of typical inflammatory molecules. Finally, it presents a brief analysis of observations supporting the therapeutic role of inflammation-targeting tiny molecules in epileptic seizures.
Collapse
Affiliation(s)
- Iqra Mukhtar
- H.E.J Research Institute of Chemistry, International Center For Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan.
| |
Collapse
|
14
|
Kong H, Wang H, Zhuo Z, Li Z, Tian P, Wu J, Liu J, Chen Z, Zhang J, Luo Q. Inhibition of miR-181a-5p reduces astrocyte and microglia activation and oxidative stress by activating SIRT1 in immature rats with epilepsy. J Transl Med 2020; 100:1223-1237. [PMID: 32461588 DOI: 10.1038/s41374-020-0444-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/07/2020] [Accepted: 05/08/2020] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs regulate gene expression at the posttranscriptional level, and this process has been shown to be implicated in the pathological processes of temporal lobe epilepsy. At present, studies about the impact of microRNA-181a (miR-181a) on epilepsy have focused on hippocampal neurons, and the effect of miR-181a on other cells in the hippocampus remains poorly understood. Herein, we explored the role of miR-181a-5p in a lithium-pilocarpine model of epilepticus in immature rats. We found that the hippocampal expression level of miR-181a-5p was increased. Inhibition of miR-181a-5p protected the hippocampus against epilepsy, including hippocampal insults, neuronal apoptosis, astrocyte and microglia activation, neuroinflammation, oxidative stress, mitochondrial function, and cognitive dysfunction. Moreover, miR-181a-5p inhibition exerted a seizure-suppressing effect via SIRT1 upregulation. Overall, our findings reveal the potential role of the miR-181a-5p/SIRT1 pathway in the development of temporal lobe epilepsy, and this pathway may represent a novel target for ameliorating epilepsy and its sequelae.
Collapse
Affiliation(s)
- Huimin Kong
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China.
| | - Huaili Wang
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Zhihong Zhuo
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Zhenbiao Li
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Peichao Tian
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Jing Wu
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Jian Liu
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Zheng Chen
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Jiyao Zhang
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China
| | - Qiang Luo
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, PR China.
| |
Collapse
|
15
|
Sanz P, Garcia-Gimeno MA. Reactive Glia Inflammatory Signaling Pathways and Epilepsy. Int J Mol Sci 2020; 21:ijms21114096. [PMID: 32521797 PMCID: PMC7312833 DOI: 10.3390/ijms21114096] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 02/06/2023] Open
Abstract
Neuroinflammation and epilepsy are interconnected. Brain inflammation promotes neuronal hyper-excitability and seizures, and dysregulation in the glia immune-inflammatory function is a common factor that predisposes or contributes to the generation of seizures. At the same time, acute seizures upregulate the production of pro-inflammatory cytokines in microglia and astrocytes, triggering a downstream cascade of inflammatory mediators. Therefore, epileptic seizures and inflammatory mediators form a vicious positive feedback loop, reinforcing each other. In this work, we have reviewed the main glial signaling pathways involved in neuroinflammation, how they are affected in epileptic conditions, and the therapeutic opportunities they offer to prevent these disorders.
Collapse
Affiliation(s)
- Pascual Sanz
- Instituto de Biomedicina de Valencia (CSIC) and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Jaime Roig 11, 46010 Valencia, Spain
- Correspondence: ; Tel.: +34-963391779; Fax: +34-963690800
| | - Maria Adelaida Garcia-Gimeno
- Department of Biotechnology, Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural (ETSIAMN), Universitat Politècnica de València, 46022 Valencia, Spain;
| |
Collapse
|
16
|
Aksoz E, Sara Y, Onur R. T-type Ca 2+ channel activity increases in rat hippocampal CA1 region during kindling epileptogenesis. Synapse 2020; 74:e22155. [PMID: 32215948 DOI: 10.1002/syn.22155] [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: 12/13/2019] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 11/07/2022]
Abstract
Epileptogenesis is a dynamical process that involves synaptic plasticity changes such as synaptic reorganization of excitatory and inhibitory systems and axonal sprouting in the hippocampus, which is one of the most studied epileptogenic regions in the brain. However, the early events that trigger these changes are not understood well. We investigated short-term and long-term synaptic plasticity parameters and T-type Ca2+ channel activity changes in the early phase of a rat kindling model. Chronic pentylenetetrazole (PTZ) application was used in order to induce the kindling process in rats. The recordings were obtained from hippocampal slices in the CA1 region at 25th day of PTZ application. Tetraethylammonium was used in order to induce long-term potentiation and T-type Ca2+ channel activity was assessed in the presence of mibefradil. We found that tetraethylammonium-induced long-term potentiation was not prevented by mibefradil in the kindling group in contrast to control group. We also found an increase in paired-pulse ratios in the PTZ-applied group. Our findings indicate an increase in the "T-type Ca2+ channel component of LTP" in the kindling group, which may be an early mechanism in epileptogenesis.
Collapse
Affiliation(s)
- Erkan Aksoz
- Faculty of Pharmacy, Department of Pharmacology, Suleyman Demirel University, Isparta, Turkey
| | - Yildirim Sara
- Faculty of Medicine, Department of Pharmacology, Hacettepe University, Ankara, Turkey
| | - Rustu Onur
- Faculty of Medicine, Department of Pharmacology, Near East University, Nicosia, TRNC
| |
Collapse
|
17
|
Eid T, Lee TSW, Patrylo P, Zaveri HP. Astrocytes and Glutamine Synthetase in Epileptogenesis. J Neurosci Res 2019; 97:1345-1362. [PMID: 30022509 PMCID: PMC6338538 DOI: 10.1002/jnr.24267] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 05/15/2018] [Accepted: 05/22/2018] [Indexed: 12/31/2022]
Abstract
The cellular, molecular, and metabolic mechanisms that underlie the development of mesial temporal lobe epilepsy are incompletely understood. Here we review the role of astrocytes in epilepsy development (a.k.a. epileptogenesis), particularly astrocyte pathologies related to: aquaporin 4, the inwardly rectifying potassium channel Kir4.1, monocarboxylate transporters MCT1 and MCT2, excitatory amino acid transporters EAAT1 and EAAT2, and glutamine synthetase. We propose that inhibition, dysfunction or loss of astrocytic glutamine synthetase is an important causative factor for some epilepsies, particularly mesial temporal lobe epilepsy and glioblastoma-associated epilepsy. We postulate that the regulatory mechanisms of glutamine synthetase as well as the downstream effects of glutamine synthetase dysfunction, represent attractive, new targets for antiepileptogenic interventions. Currently, no antiepileptogenic therapies are available for human use. The discovery of such interventions is important as it will fundamentally change the way we approach epilepsy by preventing the disease from ever becoming manifest after an epileptogenic insult to the brain.
Collapse
Affiliation(s)
- Tore Eid
- Department of Laboratory Medicine, Yale School of Medicine
- Department of Molecular Medicine, University of Oslo
| | | | - Peter Patrylo
- Department of Physiology, Southern Illinois University School of Medicine
| | | |
Collapse
|
18
|
H S N, Paudel YN, K L K. Envisioning the neuroprotective effect of Metformin in experimental epilepsy: A portrait of molecular crosstalk. Life Sci 2019; 233:116686. [PMID: 31348946 DOI: 10.1016/j.lfs.2019.116686] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 07/17/2019] [Accepted: 07/22/2019] [Indexed: 12/14/2022]
Abstract
Epilepsy is a neurological disorder characterized by an enduring predisposition to generate and aggravate epileptic seizures affecting around 1% of global population making it a serious health concern. Despite the recent advances in epilepsy research, no disease-modifying treatment able to terminate epileptogenesis have been reported yet reflecting the complexity in understanding the disease pathogenesis. To overcome the current treatment gap against epilepsy, one effective approach is to explore anti-epileptic effects from a drug that are approved to treat non-epileptic diseases. In this regard, Metformin emerged as an ideal candidate which is a first line treatment option for type 2 diabetes mellitus (T2DM), has conferred neuroprotection in several in vivo neurological disorders such as Alzheimer's diseases (AD), Parkinson's disease (PD), Stroke, Huntington's diseases (HD) including epilepsy. In addition, Metformin has ameliorated cognitive alteration, learning and memory induced by epilepsy as well as in animal model of AD. Herein, we review the promising findings demonstrated upon Metformin treatment against animal model of epilepsy however, the precise underlying mechanism of anti-epileptic potential of Metformin is not well understood. However, there is a growing understanding that Metformin demonstrates its anti-epileptic effect mainly via ameliorating brain oxidative damage, activation of AMPK, inhibition of mTOR pathway, downregulation of α-synuclein, reducing apoptosis, downregulation of BDNF and TrkB level. These reflects that Metformin being non-anti-epileptic drug (AED) has a potential to ameliorate the cellular pathways that were impaired in epilepsy reflecting its therapeutical potential against epileptic seizure that might plausibly overcome the limitations of today epilepsy treatment.
Collapse
Affiliation(s)
- Nandini H S
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagara, Mysuru 570015, Karnataka, India
| | - Yam Nath Paudel
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
| | - Krishna K L
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagara, Mysuru 570015, Karnataka, India.
| |
Collapse
|
19
|
Simões PSR, Zanelatto AO, Assis MC, Varella PPV, Yacubian EM, Carrete H, Centeno R, Araujo MS, Cavalheiro EA, Tersariol ILS, Motta G, Naffah-Mazzacoratti MDG. Plasma kallikrein-kinin system contributes to peripheral inflammation in temporal lobe epilepsy. J Neurochem 2019; 150:296-311. [PMID: 31206169 DOI: 10.1111/jnc.14793] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/10/2019] [Accepted: 06/07/2019] [Indexed: 01/15/2023]
Abstract
Temporal lobe epilepsy (TLE) is a chronic disease, characterized by severe and refractory seizures, triggered in the hippocampus and/or amygdala, disrupting the blood-brain barrier. This disruption can sustain, or aggravate, the epileptic condition. The aim of this study was to evaluate the activation of the kallikrein-kinin system in patients with TLE, as it relates to the maintenance of blood-brain barrier. Human hippocampal sclerotic tissues removed after surgery for seizure control, plasma, and serum were used in the following assays: immunostaining for white blood cells in the TLE hippocampus, C-reactive protein in serum, quantification of plasma kallikrein (PKal) and cathepsin B (CatB) activity in serum and plasma, quantification of C1-inhibitor, analysis of high-molecular-weight kininogen (H-kininogen) fragments, and activation of plasma prekallikrein for comparison with healthy controls. Infiltration of white blood cells in the sclerotic hippocampus and a significant increase in the neutrophil/lymphocyte ratio in the blood of TLE patients were observed. High levels of C-reactive protein (TLE = 1.4 ± 0.3 µg/mL), PKal (TLE = 5.4 ± 0.4 U/mL), and CatB (TLE = 4.9 ± 0.4 U/mL) were also evident in the serum of TLE patients comparing to controls. A strong linear correlation was observed between active CatB and PKal in the serum of TLE patients (r = 0.88). High levels of cleaved H-kininogen and free PKal, and low levels of C1-inhibitor (TLE = 188 ± 12 µg/mL) were observed in the serum of TLE patients. Our data demonstrated that the plasma kallikrein-kinin system is activated in patients with TLE. OPEN SCIENCE BADGES: This article has received a badge for *Open Materials* because it provided all relevant information to reproduce the study in the manuscript. The complete Open Science Disclosure form for this article can be found at the end of the article. More information about the Open Practices badges can be found at https://cos.io/our-services/open-science-badges/.
Collapse
Affiliation(s)
- Priscila S R Simões
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Alexia O Zanelatto
- Departamento de Bioquímica, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Mirian C Assis
- Departamento de Bioquímica, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Pedro Paulo V Varella
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil.,Diagnóstico da América Sociedade Anônima (DASA), Barueri, SP, Brasil
| | - Elza Marcia Yacubian
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Henrique Carrete
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Ricardo Centeno
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Mariana S Araujo
- Departamento de Bioquímica, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Esper A Cavalheiro
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | | | - Guacyara Motta
- Departamento de Bioquímica, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| | - Maria da Graça Naffah-Mazzacoratti
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil.,Departamento de Bioquímica, Escola Paulista de Medicina (UNIFESP), São Paulo, SP, Brasil
| |
Collapse
|
20
|
Leiter I, Bascuñana P, Bengel FM, Bankstahl JP, Bankstahl M. Attenuation of epileptogenesis by 2-deoxy-d-glucose is accompanied by increased cerebral glucose supply, microglial activation and reduced astrocytosis. Neurobiol Dis 2019; 130:104510. [PMID: 31212069 DOI: 10.1016/j.nbd.2019.104510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 06/02/2019] [Accepted: 06/14/2019] [Indexed: 02/03/2023] Open
Abstract
RATIONALE Neuronal excitability and brain energy homeostasis are strongly interconnected and evidence suggests that both become altered during epileptogenesis. Pharmacologic modulation of cerebral glucose metabolism might therefore exert anti-epileptogenic effects. Here we provide mechanistic insights into effects of the glycolytic inhibitor 2-deoxy-d-glucose (2-DG) on experimental epileptogenesis by longitudinal 2-deoxy-2[18F]fluoro-d-glucose positron emission tomography ([18F]FDG PET) and histology. METHODS To imitate epileptogenesis, 6 Hz-corneal kindling was performed in male NMRI mice by twice daily electrical stimulation for 21 days. Kindling groups were treated i.p. 1 min after each stimulation with either 250 mg/kg 2-DG (CoKi_2-DG) or saline (CoKi_vehicle). A separate group of unstimulated mice was treated with 2-DG (2-DG_only). Dynamic 60-min [18F]FDG PET/CT scans were acquired at baseline and interictally on days 10 and 17 of kindling. [18F]FDG uptake (%injected dose/cc) was quantified in predefined regions of interest (ROI) using a MRI-based brain atlas, and kinetic modelling was performed to evaluate glucose net influx rate Ki and glucose metabolic rate MRGlu. Furthermore, statistical parametric mapping (SPM) analysis was applied on kinetic brain maps. For histological evaluation, brain sections were stained for glucose transporter 1 (GLUT1), astrocytes, microglia, as well as dying neurons. RESULTS Post-stimulation 2-DG treatment attenuated early kindling progression, indicated by a reduction of fully-kindled mice, and a lower overall percentage of type five seizures. While 2-DG treatment alone led to globally increased Ki and MRGlu values at day 17, kindling progression per se did not influence glucose turnover. Kindling accompanied by 2-DG treatment, however, resulted in regionally elevated [18F]FDG uptake as well as increased Ki at days 10 and 17 compared both to baseline and to the 2-DG_only group. In hippocampus and thalamus, higher MRGlu values were found in the CoKi_2-DG vs. the CoKi_vehicle group at day 17. t maps resulting from SPM analysis generally confirmed the results of the ROI analysis, and additionally revealed increased MRGlu restricted to the ventral hippocampus when comparing the CoKi_2-DG and the 2-DG_only group both at days 10 and, more distinct, day 17. Immunohistochemical staining showed an attenuated kindling-induced regional activation of astrocytes in the CoKi_2-DG group. Interestingly, 2-DG treatment alone (and also in combination with kindling, but not kindling alone) led to increased microglial activation scores, whereas neither staining of GLUT1 nor of dying neurons revealed any differences to untreated controls. CONCLUSIONS Post-stimulation treatment with 2-DG exerts disease-modifying effects in the mouse 6 Hz corneal kindling model. The observed local increase in glucose supply and turnover, the alleviation of astroglial activation and the activation of microglia by 2-DG might contribute separately or in combination to its positive interference with epileptogenesis.
Collapse
Affiliation(s)
- Ina Leiter
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover and Center for Systems Neuroscience, Bünteweg 17, 30559 Hannover, Germany; Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Pablo Bascuñana
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Frank Michael Bengel
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Jens Peter Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Marion Bankstahl
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover and Center for Systems Neuroscience, Bünteweg 17, 30559 Hannover, Germany.
| |
Collapse
|
21
|
The Effect of Metformin in Experimentally Induced Animal Models of Epileptic Seizure. Behav Neurol 2019; 2019:6234758. [PMID: 30863464 PMCID: PMC6378775 DOI: 10.1155/2019/6234758] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/08/2018] [Accepted: 12/17/2018] [Indexed: 12/27/2022] Open
Abstract
Background Epilepsy is one of the common neurological illnesses which affects millions of individuals globally. Although the majority of epileptic patients have a good response for the currently available antiepileptic drugs (AEDs), about 30-40% of epileptic patients are developing resistance. In addition to low safety profiles of most of existing AEDs, there is no AED available for curative or disease-modifying actions for epilepsy so far. Objectives This systematic review is intended to evaluate the effect of metformin in acute and chronic animal models of an epileptic seizure. Methods We searched PubMed, SCOPUS, Sciences Direct, and grey literature in order to explore articles published in English from January 2010 to November 2018, using key terms “epilepsy,” “seizure,” “metformin,” “oral hypoglycemic agents,” and “oral antidiabetic drugs”. The qualities of all the included articles were assessed according to the Collaborative Approach to Meta-Analysis and Review of Animal Data from Experimental Studies (CAMARADES). Results Out of six hundred fifty original articles retrieved, eleven of them fulfilled the inclusion criteria and were included for final qualitative analysis. In these studies, metformin showed to control seizure attacks by attenuating seizure generation, delaying the onset of epilepsy, reducing hippocampal neuronal loss, and averting cognitive impairments in both acute and chronic models of an epileptic seizure. The possible mechanisms for its antiseizure or antiepileptic action might be due to activation of AMPK, antiapoptotic, antineuroinflammatory, and antioxidant properties, which possibly modify disease progression through affecting epileptogenesis. Conclusion This review revealed the benefits of metformin in alleviating symptoms of epileptic seizure and modifying different cellular and molecular changes that affect the natural history of the disease in addition to its good safety profile.
Collapse
|
22
|
Zhu M, Chen J, Guo H, Ding L, Zhang Y, Xu Y. High Mobility Group Protein B1 (HMGB1) and Interleukin-1β as Prognostic Biomarkers of Epilepsy in Children. J Child Neurol 2018; 33:909-917. [PMID: 30303442 DOI: 10.1177/0883073818801654] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The present study examined whether serum biomarkers can predict the prognosis of childhood epilepsy, including seizure frequency, electroencephalographic (EEG) changes, and cognitive impairment. We measured serum concentrations of high mobility group protein B1 (HMGB1), interleukin-1β (IL-1β), S100 calcium-binding protein B (S-100B), glial fibrillary acidic protein (GFAP), and α1-antichymotrypsin (AACT) in 180 children with new-onset epilepsy and 40 healthy children. Cognitive evaluations were performed 18 months after the initial seizure episodes at diagnosis (ie, baseline visit). The relationship between serum biomarkers and epilepsy prognosis was investigated using Pearson correlation coefficients, logistic regression analyses, and receiver operating characteristic curves. Sixty-seven patients had generalized tonic-clonic seizures, 92 had focal motor seizures, and 21 had epileptic spasms. Serum concentrations of HMGB1, IL-1β, S-100B, and GFAP were significantly higher in the epilepsy group within 24 hours of a seizure episode than in the control group. Furthermore, HMGB1 and IL-1β were significant predictors of epilepsy prognosis. Receiver operating characteristic curve analysis revealed that HMGB1 could more accurately predict seizure frequency than IL-1β; when the serum concentration of HMGB1 was >9.625 ng/mL, there was 80.6% sensitivity and 92.5% specificity for predicting seizure frequency reduction. In conclusion, HMGB1 and IL-1β have a predictive value for epilepsy prognosis in children.
Collapse
Affiliation(s)
- Min Zhu
- 1 Department of Neurology and Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu PR China
| | - Jing Chen
- 1 Department of Neurology and Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu PR China
| | - Hu Guo
- 1 Department of Neurology and Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu PR China
| | - Le Ding
- 1 Department of Neurology and Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu PR China
| | - Yue Zhang
- 1 Department of Neurology and Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu PR China
| | - Yun Xu
- 2 Department of Neurology, Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu PR China
| |
Collapse
|
23
|
Paudel YN, Shaikh MF, Chakraborti A, Kumari Y, Aledo-Serrano Á, Aleksovska K, Alvim MKM, Othman I. HMGB1: A Common Biomarker and Potential Target for TBI, Neuroinflammation, Epilepsy, and Cognitive Dysfunction. Front Neurosci 2018; 12:628. [PMID: 30271319 PMCID: PMC6142787 DOI: 10.3389/fnins.2018.00628] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 08/21/2018] [Indexed: 12/13/2022] Open
Abstract
High mobility group box protein 1 (HMGB1) is a ubiquitous nuclear protein released by glia and neurons upon inflammasome activation and activates receptor for advanced glycation end products (RAGE) and toll-like receptor (TLR) 4 on the target cells. HMGB1/TLR4 axis is a key initiator of neuroinflammation. In recent days, more attention has been paid to HMGB1 due to its contribution in traumatic brain injury (TBI), neuroinflammatory conditions, epileptogenesis, and cognitive impairments and has emerged as a novel target for those conditions. Nevertheless, HMGB1 has not been portrayed as a common prognostic biomarker for these HMGB1 mediated pathologies. The current review discusses the contribution of HMGB1/TLR4/RAGE signaling in several brain injury, neuroinflammation mediated disorders, epileptogenesis and cognitive dysfunctions and in the light of available evidence, argued the possibilities of HMGB1 as a common viable biomarker of the above mentioned neurological dysfunctions. Furthermore, the review also addresses the result of preclinical studies focused on HMGB1 targeted therapy by the HMGB1 antagonist in several ranges of HMGB1 mediated conditions and noted an encouraging result. These findings suggest HMGB1 as a potential candidate to be a common biomarker of TBI, neuroinflammation, epileptogenesis, and cognitive dysfunctions which can be used for early prediction and progression of those neurological diseases. Future study should explore toward the translational implication of HMGB1 which can open the windows of opportunities for the development of innovative therapeutics that could prevent several associated HMGB1 mediated pathologies discussed herein.
Collapse
Affiliation(s)
- Yam Nath Paudel
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Mohd Farooq Shaikh
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Ayanabha Chakraborti
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Yatinesh Kumari
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Ángel Aledo-Serrano
- Department of Neurology, Epilepsy Program, Hospital Ruber Internacional, Madrid, Spain
| | - Katina Aleksovska
- Medical Faculty, Department of Neurology, "Saints Cyril and Methodius" University, Skopje, Macedonia
| | | | - Iekhsan Othman
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| |
Collapse
|
24
|
Srivastava PK, van Eyll J, Godard P, Mazzuferi M, Delahaye-Duriez A, Van Steenwinckel J, Gressens P, Danis B, Vandenplas C, Foerch P, Leclercq K, Mairet-Coello G, Cardenas A, Vanclef F, Laaniste L, Niespodziany I, Keaney J, Gasser J, Gillet G, Shkura K, Chong SA, Behmoaras J, Kadiu I, Petretto E, Kaminski RM, Johnson MR. A systems-level framework for drug discovery identifies Csf1R as an anti-epileptic drug target. Nat Commun 2018; 9:3561. [PMID: 30177815 PMCID: PMC6120885 DOI: 10.1038/s41467-018-06008-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/03/2018] [Indexed: 01/14/2023] Open
Abstract
The identification of drug targets is highly challenging, particularly for diseases of the brain. To address this problem, we developed and experimentally validated a general computational framework for drug target discovery that combines gene regulatory information with causal reasoning ("Causal Reasoning Analytical Framework for Target discovery"-CRAFT). Using a systems genetics approach and starting from gene expression data from the target tissue, CRAFT provides a predictive framework for identifying cell membrane receptors with a direction-specified influence over disease-related gene expression profiles. As proof of concept, we applied CRAFT to epilepsy and predicted the tyrosine kinase receptor Csf1R as a potential therapeutic target. The predicted effect of Csf1R blockade in attenuating epilepsy seizures was validated in three pre-clinical models of epilepsy. These results highlight CRAFT as a systems-level framework for target discovery and suggest Csf1R blockade as a novel therapeutic strategy in epilepsy. CRAFT is applicable to disease settings other than epilepsy.
Collapse
Affiliation(s)
| | - Jonathan van Eyll
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Patrice Godard
- Clarivate Analytics (formerly the IP & Science Business of Thomson Reuters), 5901 Priestly Drive, #200, Carlsbad, CA, 92008, USA
| | - Manuela Mazzuferi
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Andree Delahaye-Duriez
- Division of Brain Sciences, Imperial College London, London, W12 0NN, UK
- UFR de Santé, Médecine et Biologie Humaine, Sorbonne Paris Cité, Université Paris 13, Bobigny, France
- PROTECT, INSERM, Sorbonne Paris Cité, Université Paris Diderot, Paris, France
| | | | - Pierre Gressens
- PROTECT, INSERM, Sorbonne Paris Cité, Université Paris Diderot, Paris, France
- School of Biomedical Engineering & Imaging Sciences, Centre for the Developing Brain, King's College London, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Benedicte Danis
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | | | - Patrik Foerch
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Karine Leclercq
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | | | - Alvaro Cardenas
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Frederic Vanclef
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Liisi Laaniste
- Division of Brain Sciences, Imperial College London, London, W12 0NN, UK
| | | | - James Keaney
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Julien Gasser
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Gaelle Gillet
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Kirill Shkura
- Division of Brain Sciences, Imperial College London, London, W12 0NN, UK
| | - Seon-Ah Chong
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Jacques Behmoaras
- Centre for Complement and Inflammation Research, Imperial College London, London, W12 0NN, UK
| | - Irena Kadiu
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium
| | - Enrico Petretto
- Duke-NUS Medical School, Centre for Computational Biology, 8 College Road, Singapore, 169857, Republic of Singapore.
- Faculty of Medicine, MRC Clinical Sciences Centre, Imperial College London, London, W12 0NN, UK.
| | - Rafal M Kaminski
- UCB Pharma, Avenue de l'industrie, Braine-l'Alleud, R9, B-1420, Belgium.
| | - Michael R Johnson
- Division of Brain Sciences, Imperial College London, London, W12 0NN, UK.
| |
Collapse
|
25
|
Paudel YN, Shaikh MF, Shah S, Kumari Y, Othman I. Role of inflammation in epilepsy and neurobehavioral comorbidities: Implication for therapy. Eur J Pharmacol 2018; 837:145-155. [PMID: 30125565 DOI: 10.1016/j.ejphar.2018.08.020] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 08/15/2018] [Accepted: 08/16/2018] [Indexed: 02/07/2023]
Abstract
Epilepsy is a devastating condition affecting around 70 million people worldwide. Moreover, the quality of life of people with epilepsy (PWE) is worsened by a series of comorbidities. The neurobehavioral comorbidities discussed herein share a reciprocal and complex relationship with epilepsy, which ultimately complicates the treatment process in PWE. Understanding the mechanistic pathway by which these comorbidities are associated with epilepsy might be instrumental in developing therapeutic interventions. Inflammatory cytokine signaling in the brain regulates important brain functions including neurotransmitter metabolism, neuroendocrine function, synaptic plasticity, dopaminergic transmission, the kynurenine pathway, and affects neurogenesis as well as the neural circuitry of moods. In this review, we hypothesize that the complex relationship between epilepsy and its related comorbidities (cognitive impairment, depression, anxiety, autism, and schizophrenia) can be unraveled through the inflammatory mechanism that plays a prominent role in all these individual conditions. An ample amount of evidence is available reporting the role of inflammation in epilepsy and all individual comorbid condition but their complex relationship with epilepsy has not yet been explored through the prospective of inflammatory pathway. Our review suggests that epilepsy and its neurobehavioral comorbidities are associated with elevated levels of several key inflammatory markers. This review also sheds light on the mechanistic association between epilepsy and its neurobehavioral comorbidities. Moreover, we analyzed several anti-inflammatory therapies available for epilepsy and its neurobehavioral comorbidities. We suggest, these anti-inflammatory therapies might be a possible intervention and could be a promising strategy for preventing epileptogenesis and its related neurobehavioral comorbidities.
Collapse
Affiliation(s)
- Yam Nath Paudel
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia
| | - Mohd Farooq Shaikh
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia.
| | - Sadia Shah
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India
| | - Yatinesh Kumari
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia
| | - Iekhsan Othman
- Neuropharmacology Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia
| |
Collapse
|
26
|
Coleman LG, Zou J, Qin L, Crews FT. HMGB1/IL-1β complexes regulate neuroimmune responses in alcoholism. Brain Behav Immun 2018; 72:61-77. [PMID: 29102800 PMCID: PMC5932292 DOI: 10.1016/j.bbi.2017.10.027] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 10/15/2017] [Accepted: 10/31/2017] [Indexed: 12/21/2022] Open
Abstract
Neuroimmune activation is a key feature of the pathologies of numerous psychiatric disorders including alcoholism, depression, and anxiety. Both HMGB1 and IL-1β have been implicated in brain disorders. Previous studies find HMGB1 andIL-1β form heterocomplexes in vitro with enhanced immune responses, lead to our hypothesis that HMGB1 and IL-1β heterocomplexes formed in vivo to contribute to the pathology of alcoholism. HMGB1/IL-1β heterocomplexes were prepared in vitro and found to potentiate IL-1β receptor proinflammatory gene induction compared to IL-1β alone in hippocampal brain slice culture. These HMGB1/IL-1β complexes were found to be increased in post-mortem human alcoholic hippocampus by co-immunoprecipiation. In mice, acute binge ethanol induced both HMGB1 and IL-1β in the brain and plasma. HMGB1 and IL-1β complexes were found only in mouse brain, with confocal microscopy revealing an ethanol-induced HMGB1 and IL-1β cytoplasmic co-localization. Surprisingly, IL-1β was found primarily in neurons. Studies in hippocampal brain slice culture found ethanol increased HMGB1/IL-1β complexes in the media. These studies suggest a novel neuroimmune mechanism in the pathology of alcoholism. Immunogenic HMGB1/IL-1β complexes represent a novel target for immune modulatory therapy in alcohol use disorders, and should be investigated in other psychiatric diseases that involve a neuroimmune component.
Collapse
Affiliation(s)
- Leon G. Coleman
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599,Corresponding Author. 104 Manning Drive, CB#7178, Thurston-Bowles Building Room 1010, Chapel Hill, NC 27599,
| | - Jian Zou
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599
| | - Liya Qin
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599
| | - Fulton T. Crews
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599
| |
Collapse
|
27
|
Copmans D, Rateb M, Tabudravu JN, Pérez-Bonilla M, Dirkx N, Vallorani R, Diaz C, Pérez del Palacio J, Smith AJ, Ebel R, Reyes F, Jaspars M, de Witte PAM. Zebrafish-Based Discovery of Antiseizure Compounds from the Red Sea: Pseurotin A 2 and Azaspirofuran A. ACS Chem Neurosci 2018; 9:1652-1662. [PMID: 29672015 DOI: 10.1021/acschemneuro.8b00060] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
In search for novel antiseizure drugs (ASDs), the European FP7-funded PharmaSea project used zebrafish embryos and larvae as a drug discovery platform to screen marine natural products to identify promising antiseizure hits in vivo for further development. Within the framework of this project, seven known heterospirocyclic γ-lactams, namely, pseurotin A, pseurotin A2, pseurotin F1, 11- O-methylpseurotin A, pseurotin D, azaspirofuran A, and azaspirofuran B, were isolated from the bioactive marine fungus Aspergillus fumigatus, and their antiseizure activity was evaluated in the larval zebrafish pentylenetetrazole (PTZ) seizure model. Pseurotin A2 and azaspirofuran A were identified as antiseizure hits, while their close chemical analogues were inactive. Besides, electrophysiological analysis from the zebrafish midbrain demonstrated that pseurotin A2 and azaspirofuran A also ameliorate PTZ-induced epileptiform discharges. Next, to determine whether these findings translate to mammalians, both compounds were analyzed in the mouse 6 Hz (44 mA) psychomotor seizure model. They lowered the seizure duration dose-dependently, thereby confirming their antiseizure properties and suggesting activity against drug-resistant seizures. Finally, in a thorough ADMET assessment, pseurotin A2 and azaspirofuran A were found to be drug-like. Based on the prominent antiseizure activity in both species and the drug-likeness, we propose pseurotin A2 and azaspirofuran A as lead compounds that are worth further investigation for the treatment of epileptic seizures. This study not only provides the first evidence of antiseizure activity of pseurotins and azaspirofurans, but also demonstrates the value of the zebrafish model in (marine) natural product drug discovery in general, and for ASD discovery in particular.
Collapse
Affiliation(s)
- Daniëlle Copmans
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, 3000 Leuven, Belgium
| | - Mostafa Rateb
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
- Faculty of Pharmacy, Pharmacognosy Department, Beni-Suef University, Beni-Suef 62513, Egypt
| | - Jioji N. Tabudravu
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - Mercedes Pérez-Bonilla
- Fundación
MEDINA, Centro de Excelencia en Investigación de Medicamentos
Innovadores en Andalucía, Parque Tecnológico de Ciencias
de la Salud, E-18016 Granada, Spain
| | - Nina Dirkx
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, 3000 Leuven, Belgium
| | - Riccardo Vallorani
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, 3000 Leuven, Belgium
| | - Caridad Diaz
- Fundación
MEDINA, Centro de Excelencia en Investigación de Medicamentos
Innovadores en Andalucía, Parque Tecnológico de Ciencias
de la Salud, E-18016 Granada, Spain
| | - José Pérez del Palacio
- Fundación
MEDINA, Centro de Excelencia en Investigación de Medicamentos
Innovadores en Andalucía, Parque Tecnológico de Ciencias
de la Salud, E-18016 Granada, Spain
| | - Alan J. Smith
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - Fernando Reyes
- Fundación
MEDINA, Centro de Excelencia en Investigación de Medicamentos
Innovadores en Andalucía, Parque Tecnológico de Ciencias
de la Salud, E-18016 Granada, Spain
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - Peter A. M. de Witte
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, 3000 Leuven, Belgium
| |
Collapse
|
28
|
Gao B, Wu Y, Yang YJ, Li WZ, Dong K, Zhou J, Yin YY, Huang DK, Wu WN. Sinomenine exerts anticonvulsant profile and neuroprotective activity in pentylenetetrazole kindled rats: involvement of inhibition of NLRP1 inflammasome. J Neuroinflammation 2018; 15:152. [PMID: 29776417 PMCID: PMC5960124 DOI: 10.1186/s12974-018-1199-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 05/13/2018] [Indexed: 02/08/2023] Open
Abstract
Background Epilepsy is a common neurological disorder and is not well controlled by available antiepileptic drugs (AEDs). Inflammation is considered to be a critical factor in the pathophysiology of epilepsy. Sinomenine (SN), a bioactive alkaloid with anti-inflammatory effect, exerts neuroprotective activity in many nervous system diseases. However, little is known about the effect of SN on epilepsy. Methods The chronic epilepsy model was established by pentylenetetrazole (PTZ) kindling. Morris water maze (MWM) was used to test spatial learning and memory ability. H.E. staining and Hoechst 33258 staining were used to evaluate hippocampal neuronal damage. The expression of nucleotide oligomerization domain (NOD)-like receptor protein 1 (NLRP1) inflammasome complexes and the level of inflammatory cytokines were determined by western blot, quantitative real-time PCR and enzyme-linked immunosorbent assay (ELISA) kits. Results SN (20, 40, and 80 mg/kg) dose-dependently disrupts the kindling acquisition process, which decreases the seizure scores and the incidence of fully kindling. SN also increases the latency of seizure and decreases the duration of seizure in fully kindled rats. In addition, different doses of SN block the hippocampal neuronal damage and minimize the impairment of spatial learning and memory in PTZ kindled rats. Finally, PTZ kindling increases the expression of NLRP1 inflammasome complexes and the levels of inflammatory cytokines IL-1β, IL-18, IL-6, and TNF-α, which are all attenuated by SN in a dose- dependent manner. Conclusions SN exerts anticonvulsant and neuroprotective activity in PTZ kindling model of epilepsy. Disrupting the kindling acquisition, which inhibits NLRP1 inflammasome-mediated inflammatory process, might be involved in its effects. Electronic supplementary material The online version of this article (10.1186/s12974-018-1199-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Bo Gao
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Yu Wu
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Yuan-Jian Yang
- Department of Psychiatry and Medical Experimental Center, Jiangxi Mental Hospital/Affiliated Mental Hospital of Nanchang University, Nanchang, 330029, People's Republic of China
| | - Wei-Zu Li
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Kun Dong
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Jun Zhou
- Department of Pharmacy, Xi'an Chest Hospital, Shaanxi University of Chinese Medicine, Xi'an, 710061, People's Republic of China
| | - Yan-Yan Yin
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Da-Ke Huang
- Synthetic Laboratory, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Wen-Ning Wu
- Department of Pharmacology, School of Basic Medical Sciences, Key Laboratory of Anti-inflammatory and Immunopharmacology, Anhui Medical University, Hefei, 230032, People's Republic of China.
| |
Collapse
|
29
|
Vezzani A, Dingledine R, Rossetti AO. Immunity and inflammation in status epilepticus and its sequelae: possibilities for therapeutic application. Expert Rev Neurother 2018; 15:1081-92. [PMID: 26312647 DOI: 10.1586/14737175.2015.1079130] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Status epilepticus (SE) is a life-threatening neurological emergency often refractory to available treatment options. It is a very heterogeneous condition in terms of clinical presentation and causes, which besides genetic, vascular and other structural causes also include CNS or severe systemic infections, sudden withdrawal from benzodiazepines or anticonvulsants and rare autoimmune etiologies. Treatment of SE is essentially based on expert opinions and antiepileptic drug treatment per se seems to have no major impact on prognosis. There is, therefore, urgent need of novel therapies that rely upon a better understanding of the basic mechanisms underlying this clinical condition. Accumulating evidence in animal models highlights that inflammation ensuing in the brain during SE may play a determinant role in ongoing seizures and their long-term detrimental consequences, independent of an infection or auto-immune cause; this evidence encourages reconsideration of the treatment flow in SE patients.
Collapse
Affiliation(s)
- Annamaria Vezzani
- a 1 Department of Neuroscience, Mario Negri Institute for Pharmacological Research, Milano, Italy
| | | | | |
Collapse
|
30
|
Liu Y, Wang T, Liu X, Wen Y, Xu T, Yu X, Wei X, Ding X, Mo L, Yin M, Tan X, Chen L. Overexpression of zinc-α2-glycoprotein suppressed seizures and seizure-related neuroflammation in pentylenetetrazol-kindled rats. J Neuroinflammation 2018; 15:92. [PMID: 29566716 PMCID: PMC5863804 DOI: 10.1186/s12974-018-1132-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 03/15/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Zinc-α2-glycoprotein (ZAG) is a 42-kDa protein reported as an anti-inflammatory adipocytokine. Evidences from clinical and experimental studies revealed that brain inflammation plays important roles in epileptogenesis and seizure. Interestingly, closely relationship between ZAG and many important inflammatory mediators has been proven. Our previous study identified ZAG in neurons and found that ZAG is decreased in epilepsy and interacts with TGFβ and ERK. This study aimed to investigate the role of ZAG in seizure and explore its effect on seizure-related neuroinflammation. METHODS We overexpressed AZGP1 in the hippocampus of rats via adeno-associated virus vector injection and observed their seizure behavior and EEG after pentylenetetrazol (PTZ) kindling. The level of typical inflammation mediators including TNFα, IL-6, TGFβ, ERK, and ERK phosphorylation were determined. RESULTS The overexpression of AZGP1 reduced the seizure severity, prolonged the latency of kindling, and alleviated epileptiform discharges in EEG changes induced by PTZ. Overexpression of AZGP1 also suppressed the expression of TNFα, IL-6, TGFβ, and ERK phosphorylaton in PTZ-kindled rats. CONCLUSIONS ZAG may inhibit TGFβ-mediated ERK phosphorylation and inhibit neuroinflammation mediated by TNFα and IL-6, suggesting ZAG may suppress seizure via inhibiting neuroinflammation. ZAG may be a potential and novel therapeutic target for epilepsy.
Collapse
Affiliation(s)
- Ying Liu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Teng Wang
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Xi Liu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Yuetao Wen
- Department of Neurosurgery, The University-Town Hospital of Chongqing Medical University, Chongqing, 401331 China
| | - Tao Xu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Xinyuan Yu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Xin Wei
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Xueying Ding
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Lijuan Mo
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Maojia Yin
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Xinjie Tan
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| | - Lifen Chen
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, 74 Linjiang Road, Yuzhong District, Chonqing, 400010 China
| |
Collapse
|
31
|
Follow-Up of Peripheral IL-1β and IL-6 and Relation with Apoptotic Death in Drug-Resistant Temporal Lobe Epilepsy Patients Submitted to Surgery. Behav Sci (Basel) 2018; 8:bs8020021. [PMID: 29401729 PMCID: PMC5836004 DOI: 10.3390/bs8020021] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/24/2018] [Accepted: 01/30/2018] [Indexed: 12/11/2022] Open
Abstract
Increasing amounts of evidence support the role of inflammation in epilepsy. This study was done to evaluate serum follow-up of IL-1β and IL-6 levels, as well as their concentration in the neocortex, and the relationship of central inflammation with NF-κB and annexin V in drug-resistant temporal lobe epileptic (DRTLE) patients submitted to surgical treatment. Peripheral and central levels of IL-1β and IL-6were measured by ELISA in 10 DRTLE patients. The sera from patients were taken before surgery, and 12 and 24 months after surgical treatment. The neocortical expression of NF-κB was evaluated by western blotting and annexin V co-localization with synaptophysin by immunohistochemistry. The neocortical tissues from five patients who died by non-neurological causes were used as control. Decreased serum levels of IL-1 and IL-6 were observed after surgery; at this time, 70% of patients were seizure-free. No values of IL-1 and IL-6 were detected in neocortical control tissue, whereas cytokine levels were evidenced in DRTLE. Increased NF-κB neocortex expression was found and the positive annexin V neurons were more obvious in the DRTLE tissue, correlating with IL-6 levels. The follow-up study confirmed that the inflammatory alterations disappeared one year after surgery, when the majority of patients were seizure-free, and the apoptotic death process correlated with inflammation.
Collapse
|
32
|
Miratashi Yazdi SA, Abbasi M, Miratashi Yazdi SM. Epilepsy and vitamin D: a comprehensive review of current knowledge. Rev Neurosci 2018; 28:185-201. [PMID: 27988507 DOI: 10.1515/revneuro-2016-0044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/24/2016] [Indexed: 12/29/2022]
Abstract
Vitamin D has been considered as neurosteroid, and its pivotal role in neuroprotection, brain development, and immunomodulation has been noticed in studies; however, our knowledge regarding its role in neurological disorders is still developing. The potential role of vitamin D in the pathophysiology and treatment of epilepsy, as one the most prevalent neurological disorders, has received less attention in recent years. In this article, we review the possible relationship between vitamin D and epilepsy from different aspects, including the action mechanism of vitamin D in the central nervous system and ecological and epidemiological findings. We also present the outcome of studies that evaluated the level of vitamin D and the impact of administrating vitamin D in epileptic patients or animal subjects. We also review the current evidence on interactions between vitamin D and antiepileptic drugs.
Collapse
|
33
|
Lasoń W, Ślusarczyk J, Regulska M, Leśkiewicz M, Basta-Kaim A. Do minocycline and other suppressors of microglia reactivity have a future in prevention or treatment of epilepsy? JOURNAL OF EPILEPTOLOGY 2017. [DOI: 10.1515/joepi-2017-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
SummaryIntroduction.An increasing body of evidence points to an important role of neuroinflammatory processes in the pathomechanism of epilepsy. This hypothesis is mainly supported by data showing an increase of pro-inflammatory cytokine levels and glia activation in animal models of epilepsy and in brain tissue of epileptic patients. On the other hand, less emphasis has been put on pharmacological verification of this hypothesis.Aim.The aim of this review is to summarize current knowledge on potential usefulness of microglia regulators and anti-inflammatory agents in designing antiepileptic/antiepileptogenic drugs, with the primary mechanism of action based on the inhibition of neuroinflammation.Methods.We reviewed PubMed and MEDLINE databases to select publications in the topic: epilepsy, neuroinflammation, microglia and microglia regulators with antiepileptic properties. We searched the databases up to April 2017 with no date restrictions.Review and Discussion.In the present paper, we will discuss new concepts of epileptogenesis which focus not only on changes in neurons but also take into consideration the role of activation of glial cells: microglia and astrocytes. Neuroinflammation, mainly through increased production of pro-inflammatory factors such as cytokines or chemokines, may play an important role in the development of epilepsy. Drugs regulating glial cells activation and consequently inflammatory status in the central nervous system have beneficial effects in different animal models of epilepsy as well as in clinical study in patients. The most promising compound seems to be minocycline which in some studies has been shown to possess antiepileptogenetic action. On the other hand, some antiepileptic drugs exhibit marked anti-inflammatory potency.Conclusions.There are much data to suggest that there is significant opportunity for designing new antiepileptic drugs whose primary mechanism of action entails the inhibition of neuroinflammatory processes.
Collapse
|
34
|
Copmans D, Orellana-Paucar AM, Steurs G, Zhang Y, Ny A, Foubert K, Exarchou V, Siekierska A, Kim Y, De Borggraeve W, Dehaen W, Pieters L, de Witte PAM. Methylated flavonoids as anti-seizure agents: Naringenin 4',7-dimethyl ether attenuates epileptic seizures in zebrafish and mouse models. Neurochem Int 2017; 112:124-133. [PMID: 29174382 DOI: 10.1016/j.neuint.2017.11.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 11/06/2017] [Accepted: 11/20/2017] [Indexed: 01/14/2023]
Abstract
Epilepsy is a neurological disease that affects more than 70 million people worldwide and is characterized by the presence of spontaneous unprovoked recurrent seizures. Existing anti-seizure drugs (ASDs) have side effects and fail to control seizures in 30% of patients due to drug resistance. Hence, safer and more efficacious drugs are sorely needed. Flavonoids are polyphenolic structures naturally present in most plants and consumed daily with no adverse effects reported. These structures have shown activity in several seizure and epilepsy animal models through allosteric modulation of GABAA receptors, but also via potent anti-inflammatory action in the brain. As such, dietary flavonoids offer an interesting source for ASD and anti-epileptogenic drug (AED) discovery, but their pharmaceutical potential is often hampered by metabolic instability and low oral bioavailability. It has been argued that their drug-likeness can be improved via methylation of the free hydroxyl groups, thereby dramatically enhancing metabolic stability and membrane transport, facilitating absorption and highly increasing bioavailability. Since no scientific data is available regarding the use of methylated flavonoids in the fight against epilepsy, we studied naringenin (NRG), kaempferol (KFL), and three methylated derivatives, i.e., naringenin 7-O-methyl ether (NRG-M), naringenin 4',7-dimethyl ether (NRG-DM), and kaempferide (4'-O-methyl kaempferol) (KFD) in the zebrafish pentylenetetrazole (PTZ) seizure model. We demonstrate that the methylated flavanones NRG-DM and NRG-M are highly effective against PTZ-induced seizures in larval zebrafish, whereas NRG and the flavonols KFL and KFD possess only a limited activity. Moreover, we show that NRG-DM is active in two standard acute mouse seizure models, i.e., the timed i.v. PTZ seizure model and the 6-Hz psychomotor seizure model. Based on these results, NRG-DM is proposed as a lead compound that is worth further investigation for the treatment of generalized seizures and drug-resistant focal seizures. Our data therefore highlights the potential of methylated flavonoids in the search for new and improved ASDs.
Collapse
Affiliation(s)
- Daniëlle Copmans
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Adriana M Orellana-Paucar
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium; Carrera de Bioquímica y Farmacia, Facultad de Ciencias Químicas, Universidad de Cuenca, Cuenca, Ecuador
| | - Gert Steurs
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven - University of Leuven, Leuven, Belgium
| | - Yifan Zhang
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Annelii Ny
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Kenn Foubert
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Vasiliki Exarchou
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Aleksandra Siekierska
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Youngju Kim
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven - University of Leuven, Leuven, Belgium
| | - Wim De Borggraeve
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven - University of Leuven, Leuven, Belgium
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven - University of Leuven, Leuven, Belgium
| | - Luc Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Peter A M de Witte
- Laboratory for Molecular Biodiscovery, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven - University of Leuven, Leuven, Belgium.
| |
Collapse
|
35
|
Kadam SD, D'Ambrosio R, Duveau V, Roucard C, Garcia-Cairasco N, Ikeda A, de Curtis M, Galanopoulou AS, Kelly KM. Methodological standards and interpretation of video-electroencephalography in adult control rodents. A TASK1-WG1 report of the AES/ILAE Translational Task Force of the ILAE. Epilepsia 2017; 58 Suppl 4:10-27. [PMID: 29105073 DOI: 10.1111/epi.13903] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2017] [Indexed: 01/13/2023]
Abstract
In vivo electrophysiological recordings are widely used in neuroscience research, and video-electroencephalography (vEEG) has become a mainstay of preclinical neuroscience research, including studies of epilepsy and cognition. Studies utilizing vEEG typically involve comparison of measurements obtained from different experimental groups, or from the same experimental group at different times, in which one set of measurements serves as "control" and the others as "test" of the variables of interest. Thus, controls provide mainly a reference measurement for the experimental test. Control rodents represent an undiagnosed population, and cannot be assumed to be "normal" in the sense of being "healthy." Certain physiological EEG patterns seen in humans are also seen in control rodents. However, interpretation of rodent vEEG studies relies on documented differences in frequency, morphology, type, location, behavioral state dependence, reactivity, and functional or structural correlates of specific EEG patterns and features between control and test groups. This paper will focus on the vEEG of standard laboratory rodent strains with the aim of developing a small set of practical guidelines that can assist researchers in the design, reporting, and interpretation of future vEEG studies. To this end, we will: (1) discuss advantages and pitfalls of common vEEG techniques in rodents and propose a set of recommended practices and (2) present EEG patterns and associated behaviors recorded from adult rats of a variety of strains. We will describe the defining features of selected vEEG patterns (brain-generated or artifactual) and note similarities to vEEG patterns seen in adult humans. We will note similarities to normal variants or pathological human EEG patterns and defer their interpretation to a future report focusing on rodent seizure patterns.
Collapse
Affiliation(s)
- Shilpa D Kadam
- Department of Neurology, Kennedy Krieger Institute and Johns Hopkins University School of Medicine, Baltimore, Maryland, U.S.A
| | - Raimondo D'Ambrosio
- Department of Neurological Surgery and Regional Epilepsy Center, University of Washington, Seattle, Washington, U.S.A
| | | | | | - Norberto Garcia-Cairasco
- Neurophysiology and Experimental Neuroethology Laboratory, Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders, and Physiology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Marco de Curtis
- Epileptology and Experimental Neurophysiology Unit, Institutes of Hospitality and Care of a Scientific Nature (IRCCS) Foundation, Carlo Besta Neurological Institute, Milan, Italy
| | - Aristea S Galanopoulou
- Laboratory of Developmental Epilepsy, Saul R. Korey Department of Neurology, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York, U.S.A
| | - Kevin M Kelly
- Brain Injury and Epilepsy Research Laboratory, Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, Pennsylvania, U.S.A
| |
Collapse
|
36
|
Leal B, Chaves J, Carvalho C, Rangel R, Santos A, Bettencourt A, Lopes J, Ramalheira J, Silva BM, da Silva AM, Costa PP. Brain expression of inflammatory mediators in Mesial Temporal Lobe Epilepsy patients. J Neuroimmunol 2017; 313:82-88. [PMID: 29153613 DOI: 10.1016/j.jneuroim.2017.10.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 10/04/2017] [Accepted: 10/18/2017] [Indexed: 12/13/2022]
Abstract
Neuroinflammation may be central in epileptogenesis. In this study we analysed inflammatory reaction markers in brain tissue of Mesial Temporal Lobe Epilepsy with Hippocampal Sclerosis (MTLE-HS) patients. TLR4, IL-1β and IL-10 gene expression as well as the presence of activated HLA-DR+ microglia was evaluated in 23 patients and 10 cadaveric controls. Inflammation characterized by the presence of HLA-DR+ microglia and TLR4, IL-1β overexpression was evident in hippocampus and anterior temporal cortex of MTLE-HS patients. Anti-inflammatory IL-10 was also overexpressed in MTLE-HS patients. Our results show that hippocampal neuroinflammation extends beyond lesional limits, as far as the anterior temporal cortex.
Collapse
Affiliation(s)
- Bárbara Leal
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Lab. Imunogenética, DPIM, ICBAS-UPorto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - João Chaves
- Serviço de Neurologia, Hospital de Santo António, Centro Hospitalar e Universitário do Porto, Largo Prof. Abel Salazar, 4099-003 Porto, Portugal
| | - Cláudia Carvalho
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Lab. Imunogenética, DPIM, ICBAS-UPorto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Rui Rangel
- Serviço de Neurocirurgia, Hospital de Santo António, Centro Hospitalar e Universitário do Porto, Largo Prof. Abel Salazar, 4099-003 Porto, Portugal
| | - Agostinho Santos
- Serviço de Patologia Forense, Instituto Nacional de Medicina Legal e ciências Forenses - Delegação do Norte (INMLCF-DN), Porto, Portugal
| | - Andreia Bettencourt
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Lab. Imunogenética, DPIM, ICBAS-UPorto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - João Lopes
- Serviço de Neurofisiologia, Hospital de Santo António, Centro Hospitalar do Porto, Largo Prof. Abel Salazar, 4099-003 Porto, Portugal
| | - João Ramalheira
- Serviço de Neurofisiologia, Hospital de Santo António, Centro Hospitalar do Porto, Largo Prof. Abel Salazar, 4099-003 Porto, Portugal
| | - Berta M Silva
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Lab. Imunogenética, DPIM, ICBAS-UPorto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - António Martins da Silva
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Serviço de Neurofisiologia, Hospital de Santo António, Centro Hospitalar do Porto, Largo Prof. Abel Salazar, 4099-003 Porto, Portugal
| | - Paulo P Costa
- UMIB - Instituto de Ciências Biomédicas Abel Salazar [ICBAS], Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Departamento de Genética, Instituto Nacional de Saúde Dr. Ricardo Jorge, Porto Rua Pedro Nunes, n.° 88; 4099-032 Porto, Portugal
| |
Collapse
|
37
|
Koepp MJ, Årstad E, Bankstahl JP, Dedeurwaerdere S, Friedman A, Potschka H, Ravizza T, Theodore WH, Baram TZ. Neuroinflammation imaging markers for epileptogenesis. Epilepsia 2017; 58 Suppl 3:11-19. [PMID: 28675560 DOI: 10.1111/epi.13778] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2017] [Indexed: 12/23/2022]
Abstract
Epilepsy can be a devastating disorder. In addition to debilitating seizures, epilepsy can cause cognitive and emotional problems with reduced quality of life. Therefore, the major aim is to prevent the disorder in the first place: identify, detect, and reverse the processes responsible for its onset, and monitor and treat its progression. Epilepsy often occurs following a latent period of months to years (epileptogenesis) as a consequence of a brain insult, such as head trauma, stroke, or status epilepticus. Although this latent period clearly represents a therapeutic window, we are not able to stratify patients at risk for long-term epilepsy, which is prerequisite for preventative clinical trials. Moreover, because of the length of the latent period, an early biomarker for treatment response would be of high value. Finally, mechanistic biomarkers of epileptogenesis may provide more profound insight in the process of disease development.
Collapse
Affiliation(s)
- Matthias J Koepp
- Institute of Neurology, University College London, London, United Kingdom
| | - Eric Årstad
- Department of Chemistry and Institute of Nuclear Medicine, University College London, London, United Kingdom
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | | | - Alon Friedman
- Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Dalhousie University, Halifax, Nova Scotia, Canada
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology, and Pharmacy, Ludwig-Maximilians-University, Munich, Germany
| | - Teresa Ravizza
- Department of Neuroscience, IRCCS-Institute for Pharmacological Research Mario Negri, Milan, Italy
| | | | - Tallie Z Baram
- Departments of Pediatrics, Anatomy/Neurobiology, Neurology, University of California-Irvine, Irvine, California, U.S.A
| |
Collapse
|
38
|
Vezzani A, Rüegg S. Introduction to the 2nd Meeting on Immunity and Inflammation in Epilepsy (IIE2016). Epilepsia 2017; 58 Suppl 3:7-10. [PMID: 28675561 DOI: 10.1111/epi.13780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2017] [Indexed: 12/01/2022]
Abstract
We report about the main topics presented during this meeting which was devoted to discuss the new emerging evidence for a role of immune- and inflammation-related mechanisms in various autoimmune and nonautoimmune forms of epilepsy. Major emphasis was given to novel immune/inflammatory mechanisms contributing to seizures and neurological comorbidities as well as to the discovery and validation of noninvasive biomarkers of brain inflammation which may be used to monitor epileptogenesis and predict the therapeutic effects of treatments. The key question was whether our scientific community is ready for the translation of the results of laboratory research to clinical studies, and how to best design clinical trials of anti-inflammatory drugs with potential disease-modifying effects.
Collapse
Affiliation(s)
- Annamaria Vezzani
- Department of Neuroscience, IRCCS-Mario Negri Institute for Pharmacological Research, Milano, Italy
| | | |
Collapse
|
39
|
Barker-Haliski ML, Löscher W, White HS, Galanopoulou AS. Neuroinflammation in epileptogenesis: Insights and translational perspectives from new models of epilepsy. Epilepsia 2017; 58 Suppl 3:39-47. [PMID: 28675559 PMCID: PMC5604891 DOI: 10.1111/epi.13785] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2017] [Indexed: 12/25/2022]
Abstract
Animal models have provided a wealth of information on mechanisms of epileptogenesis and comorbidogenesis, and have significantly advanced our ability to investigate the potential of new therapies. Processes implicating brain inflammation have been increasingly observed in epilepsy research. Herein we discuss the progress on animal models of epilepsy and comorbidities that inform us on the potential role of inflammation in epileptogenesis and comorbidity pathogenesis in rodent models of West syndrome and the Theiler's murine encephalomyelitis virus (TMEV) mouse model of viral encephalitis-induced epilepsy. Rat models of infantile spasms were generated in rat pups after right intracerebral injections of proinflammatory compounds (lipopolysaccharides with or without doxorubicin, or cytokines) and were longitudinally monitored for epileptic spasms and neurodevelopmental and cognitive deficits. Anti-inflammatory treatments were tested after the onset of spasms. The TMEV mouse model was induced with intracerebral administration of TMEV and prospective monitoring for handling-induced seizures or seizure susceptibility, as well as long-term evaluations of behavioral comorbidities of epilepsy. Inflammatory processes are evident in both models and are implicated in the pathogenesis of the observed seizures and comorbidities. A common feature of these models, based on the data so far available, is their pharmacoresistant profile. The presented data support the role of inflammatory pathways in epileptogenesis and comorbidities in two distinct epilepsy models. Pharmacoresistance is a common feature of both inflammation-based models. Utilization of these models may facilitate the identification of age-specific, syndrome- or etiology-specific therapies for the epilepsies and attendant comorbidities, including the drug-resistant forms.
Collapse
Affiliation(s)
| | - Wolfgang Löscher
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine, Hannover, Germany
| | - H. Steve White
- Department of Pharmacy, School of Pharmacy, University of Washington, Seattle, WA, USA
| | - Aristea S. Galanopoulou
- Saul R. Korey Department of Neurology, Dominick P. Purpura Department of Neuroscience, Laboratory of Developmental Epilepsy, Bronx NY USA
| |
Collapse
|
40
|
Russmann V, Brendel M, Mille E, Helm-Vicidomini A, Beck R, Günther L, Lindner S, Rominger A, Keck M, Salvamoser JD, Albert NL, Bartenstein P, Potschka H. Identification of brain regions predicting epileptogenesis by serial [ 18F]GE-180 positron emission tomography imaging of neuroinflammation in a rat model of temporal lobe epilepsy. NEUROIMAGE-CLINICAL 2017; 15:35-44. [PMID: 28462087 PMCID: PMC5403805 DOI: 10.1016/j.nicl.2017.04.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 12/12/2022]
Abstract
Excessive activation of inflammatory signaling pathways seems to be a hallmark of epileptogenesis. Positron emission tomography (PET) allows in vivo detection of brain inflammation with spatial information and opportunities for longitudinal follow-up scanning protocols. Here, we assessed whether molecular imaging of the 18 kDa translocator protein (TSPO) can serve as a biomarker for the development of epilepsy. Therefore, brain uptake of [18F]GE-180, a highly selective radioligand of TSPO, was investigated in a longitudinal PET study in a chronic rat model of temporal lobe epilepsy. Analyses revealed that the influence of the epileptogenic insult on [18F]GE-180 brain uptake was most pronounced in the earlier phase of epileptogenesis. Differences were evident in various brain regions during earlier phases of epileptogenesis with [18F]GE-180 standardized uptake value enhanced by 2.1 to 2.7fold. In contrast, brain regions exhibiting differences seemed to be more restricted with less pronounced increases of tracer uptake by 1.8-2.5fold four weeks following status epilepticus and by 1.5-1.8fold in the chronic phase. Based on correlation analysis, we were able to identify regions with a predictive value showing a correlation with seizure development. These regions include the amygdala as well as a cluster of brain areas. This cluster comprises parts of different brain regions, e.g. the hippocampus, parietal cortex, thalamus, and somatosensory cortex. In conclusion, the data provide evidence that [18F]GE-180 PET brain imaging can serve as a biomarker of epileptogenesis. The identification of brain regions with predictive value might facilitate the development of preventive concepts as well as the early assessment of the interventional success. Future studies are necessary to further confirm the predictivity of the approach.
Collapse
Affiliation(s)
- Vera Russmann
- Institute of Pharmacology, Toxicology & Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Matthias Brendel
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Erik Mille
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Angela Helm-Vicidomini
- Institute of Pharmacology, Toxicology & Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Roswitha Beck
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany; German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Lisa Günther
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany; German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Simon Lindner
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Axel Rominger
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Michael Keck
- Institute of Pharmacology, Toxicology & Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Josephine D Salvamoser
- Institute of Pharmacology, Toxicology & Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Nathalie L Albert
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Peter Bartenstein
- Department of Nuclear Medicine, University Hospital Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology & Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany.
| |
Collapse
|
41
|
Scorza CA, Marques MJG, Gomes da Silva S, Naffah-Mazzacoratti MDG, Scorza FA, Cavalheiro EA. Status epilepticus does not induce acute brain inflammatory response in the Amazon rodent Proechimys, an animal model resistant to epileptogenesis. Neurosci Lett 2017; 668:169-173. [PMID: 28235602 DOI: 10.1016/j.neulet.2017.02.049] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 01/31/2017] [Accepted: 02/20/2017] [Indexed: 12/23/2022]
Abstract
Mesial temporal lobe epilepsy is a serious brain disorder in adults that is often preceded by an initial brain insult, such as status epilepticus (SE), that after a latent period leads to recurrent seizures. Post-SE models are widely used for studies on epileptogenic processes. Previous findings of our laboratory suggested that the Neotropical rodents Proechimys exhibit endogenous antiepileptogenic mechanisms in post-SE models. Strong body of research supports that SE triggers a rapid and dramatic upregulation of inflammatory mediators and vascular endothelial growth factor (VEGF). In this work we found that, in the epilepsy-resistant Proechimys, hippocampal and cortical levels of inflammatory cytokines (IL-1β, IL-6, IL-10, TNF-α) and VEGF remained unchanged 24h after SE, strongly contrasting to the high levels of post-SE changes observed in Wistar rats. Furthermore, substantial differences in the brain baseline levels of these proteins were encountered between animal species studied. Since inflammatory cytokines and VEGF have been recognized as major orchestrators of the epileptogenic process, our results suggest their role in the antiepileptogenic mechanisms previously described in Proechimys.
Collapse
Affiliation(s)
- Carla A Scorza
- Disciplina de Neurociência, Escola Paulista de Medicina/Universidade Federal de São Paulo, Brazil.
| | - Marcia J G Marques
- Disciplina de Neurociência, Escola Paulista de Medicina/Universidade Federal de São Paulo, Brazil
| | - Sérgio Gomes da Silva
- Hospital Israelita Albert Einstein, São Paulo, SP, Brazil; Núcleo de Pesquisas Tecnológicas, Universidade de Mogi das Cruzes, Mogi das Cruzes, SP, Brazil.
| | | | - Fulvio A Scorza
- Disciplina de Neurociência, Escola Paulista de Medicina/Universidade Federal de São Paulo, Brazil
| | - Esper A Cavalheiro
- Disciplina de Neurociência, Escola Paulista de Medicina/Universidade Federal de São Paulo, Brazil
| |
Collapse
|
42
|
Scott G, Mahmud M, Owen DR, Johnson MR. Microglial positron emission tomography (PET) imaging in epilepsy: Applications, opportunities and pitfalls. Seizure 2017; 44:42-47. [DOI: 10.1016/j.seizure.2016.10.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 10/27/2016] [Indexed: 10/20/2022] Open
|
43
|
Iori V, Iyer AM, Ravizza T, Beltrame L, Paracchini L, Marchini S, Cerovic M, Hill C, Ferrari M, Zucchetti M, Molteni M, Rossetti C, Brambilla R, Steve White H, D'Incalci M, Aronica E, Vezzani A. Blockade of the IL-1R1/TLR4 pathway mediates disease-modification therapeutic effects in a model of acquired epilepsy. Neurobiol Dis 2016; 99:12-23. [PMID: 27939857 DOI: 10.1016/j.nbd.2016.12.007] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/29/2016] [Accepted: 12/07/2016] [Indexed: 01/01/2023] Open
Abstract
We recently discovered that forebrain activation of the IL-1 receptor/Toll-like receptor (IL-1R1/TLR4) innate immunity signal plays a pivotal role in neuronal hyperexcitability underlying seizures in rodents. Since this pathway is activated in neurons and glia in human epileptogenic foci, it represents a potential target for developing drugs interfering with the mechanisms of epileptogenesis that lead to spontaneous seizures. The lack of such drugs represents a major unmet clinical need. We tested therefore novel therapies inhibiting the IL-1R1/TLR4 signaling in an established murine model of acquired epilepsy. We used an epigenetic approach by injecting a synthetic mimic of micro(mi)RNA-146a that impairs IL1R1/TLR4 signal transduction, or we blocked receptor activation with antiinflammatory drugs. Both interventions when transiently applied to mice after epilepsy onset, prevented disease progression and dramatically reduced chronic seizure recurrence, while the anticonvulsant drug carbamazepine was ineffective. We conclude that IL-1R1/TLR4 is a novel potential therapeutic target for attaining disease-modifications in patients with diagnosed epilepsy.
Collapse
Affiliation(s)
- Valentina Iori
- Department of Neuroscience, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy; Department of (Neuro)Pathology, Academic Medical Center, Amsterdam, The Netherlands
| | - Anand M Iyer
- Department of (Neuro)Pathology, Academic Medical Center, Amsterdam, The Netherlands
| | - Teresa Ravizza
- Department of Neuroscience, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Luca Beltrame
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Lara Paracchini
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Sergio Marchini
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Milica Cerovic
- Department of Neuroscience, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Cameron Hill
- Department of Pharmacy, University of Washington, Seattle, WA, USA
| | - Mariella Ferrari
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Massimo Zucchetti
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Monica Molteni
- Department of Biotechnologies and Life Sciences, Insubria University, Varese, Italy
| | - Carlo Rossetti
- Department of Biotechnologies and Life Sciences, Insubria University, Varese, Italy
| | - Riccardo Brambilla
- Department of Neuroscience, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy; Neuroscience and Mental Health Research Institute, Division of Neuroscience, School of Biosciences, Cardiff University, United Kingdom
| | - H Steve White
- Department of Pharmacy, University of Washington, Seattle, WA, USA
| | - Maurizio D'Incalci
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Eleonora Aronica
- Department of (Neuro)Pathology, Academic Medical Center, Amsterdam, The Netherlands; Swammerdam Institute for Life Sciences, Center for Neuroscience, University of Amsterdam, The Netherlands; Stichting Epilepsie Instellingen (SEIN) Nederland and Epilepsy Institute in The Netherlands Foundation, The Netherlands.
| | - Annamaria Vezzani
- Department of Neuroscience, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy.
| |
Collapse
|
44
|
Barbalho PG, Carvalho BDS, Lopes-Cendes I, Maurer-Morelli CV. Cyclooxygenase-1 as a Potential Therapeutic Target for Seizure Suppression: Evidences from Zebrafish Pentylenetetrazole-Seizure Model. Front Neurol 2016; 7:200. [PMID: 27895618 PMCID: PMC5108920 DOI: 10.3389/fneur.2016.00200] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 10/31/2016] [Indexed: 01/21/2023] Open
Abstract
Cyclooxygenases (COX)-1 and -2 are isoenzymes that catalyze the conversion of arachidonic acid into prostaglandins (PGs). COX-2 and PGs are rapidly increased following seizures and are known to play important roles in the neuroinflammatory process. COX-2 isoform has been predominantly explored as the most suitable target for pharmacological intervention in epilepsy studies, while COX-1 remains poorly investigated. In the present study, we evaluated the effects of selective COX-1 inhibitor or selective COX-2 inhibitor on seizure suppression in the zebrafish pentylenetetrazole (PTZ)-seizure model. Zebrafish larvae were incubated in 5 μM of SC-236 for 24 h or 2.8 μM of SC-560 for 30 min, followed by exposure to 15 mM PTZ for 60 min. Real-time quantitative PCR analysis was carried out to investigate transcription levels of cox1 (ptgs1), as well as to determine cfos levels, used as a marker for neuronal activity. Effects of selective COX-2 or COX-1 inhibitors on locomotor activity response (velocity and distance moved) during PTZ exposure were evaluated using the Danio Vision video-tracking system. Our results showed an inducible expression of the cox1 gene after 60 min of PTZ exposure. Cox1 mRNA levels were upregulated compared with the control group. We found that COX-2 inhibition treatment had no effect on zebrafish PTZ-induced seizures. On the other hand, COX-1 inhibition significantly attenuated PTZ-induced increase of locomotor activity and reduced the c-fos mRNA expression. These findings suggest that COX-1 inhibition rather than COX-2 has positive effects on seizure suppression in the zebrafish PTZ-seizure model.
Collapse
Affiliation(s)
| | - Benilton de Sá Carvalho
- Department of Statistics, Institute of Mathematics, Statistics and Scientific Computing, University of Campinas , Sao Paulo , Brazil
| | - Iscia Lopes-Cendes
- Department of Medical Genetics, School of Medical Sciences, University of Campinas , Sao Paulo , Brazil
| | | |
Collapse
|
45
|
Gambardella A, Labate A, Cifelli P, Ruffolo G, Mumoli L, Aronica E, Palma E. Pharmacological modulation in mesial temporal lobe epilepsy: Current status and future perspectives. Pharmacol Res 2016; 113:421-425. [DOI: 10.1016/j.phrs.2016.09.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/13/2016] [Accepted: 09/17/2016] [Indexed: 11/29/2022]
|
46
|
Role of the purinergic signaling in epilepsy. Pharmacol Rep 2016; 69:130-138. [PMID: 27915186 DOI: 10.1016/j.pharep.2016.09.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/20/2016] [Accepted: 09/21/2016] [Indexed: 01/19/2023]
Abstract
Adenine nucleotides and adenosine are signaling molecules that activate purinergic receptors P1 and P2. Activation of A1 adenosine receptors has an anticonvulsant action, whereas activation of A2A receptors might initiate seizures. Therefore, a significant limitation to the use of A1 receptor agonists as drugs in the CNS might be their peripheral side effects. The anti-epileptic activity of adenosine is related to its increased concentration outside the cell. This increase might result from the inhibition of the equilibrative nucleoside transporters (ENTs). Moreover, the implantation of implants or stem cells into the brain might cause slow and persistent increases in adenosine concentrations in the extracellular spaces of the brain. The role of adenosine in seizure inhibition has been confirmed by results demonstrating that in patients with epilepsy, the adenosine kinase (ADK) present in astrocytes is the only purine-metabolizing enzyme that exhibits increased expression. Increased ADK activity causes intensified phosphorylation of adenosine to 5'-AMP, which therefore lowers the adenosine level in the extracellular spaces. These changes might initiate astrogliosis and epileptogenesis, which are the manifestations of epilepsy. Seizures might induce inflammatory processes and vice versa. Activation of P2X7 receptors causes intensified release of pro-inflammatory cytokines (IL-1β and TNF-α) and activates metabolic pathways that induce inflammatory processes in the CNS. Therefore, antagonists of P2X7 and the interleukin 1β receptor might be efficient drugs for recurring seizures and prolonged status epilepticus. Inhibitors of ADK would simultaneously inhibit the seizures, prevent the astrogliosis and epileptogenesis processes and prevent the formation of new epileptogenic foci. Therefore, these drugs might become beneficial seizure-suppressing drugs.
Collapse
|
47
|
Terrone G, Pauletti A, Pascente R, Vezzani A. Preventing epileptogenesis: A realistic goal? Pharmacol Res 2016; 110:96-100. [DOI: 10.1016/j.phrs.2016.05.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 05/02/2016] [Accepted: 05/05/2016] [Indexed: 12/16/2022]
|
48
|
Fischer W, Franke H, Krügel U, Müller H, Dinkel K, Lord B, Letavic MA, Henshall DC, Engel T. Critical Evaluation of P2X7 Receptor Antagonists in Selected Seizure Models. PLoS One 2016; 11:e0156468. [PMID: 27281030 PMCID: PMC4900628 DOI: 10.1371/journal.pone.0156468] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/13/2016] [Indexed: 01/03/2023] Open
Abstract
The ATP-gated P2X7 receptor (P2X7R) is a non-selective cation channel which senses high extracellular ATP concentrations and has been suggested as a target for the treatment of neuroinflammation and neurodegenerative diseases. The use of P2X7R antagonists may therefore be a viable approach for treating CNS pathologies, including epileptic disorders. Recent studies showed anticonvulsant potential of P2X7R antagonists in certain animal models. To extend this work, we tested three CNS-permeable P2X7R blocker (Brilliant Blue G, AFC-5128, JNJ-47965567) and a natural compound derivative (tanshinone IIA sulfonate) in four well-characterized animal seizure models. In the maximal electroshock seizure threshold test and the pentylenetetrazol (PTZ) seizure threshold test in mice, none of the four compounds demonstrated anticonvulsant effects when given alone. Notably, in combination with carbamazepine, both AFC-5128 and JNJ-47965567 increased the threshold in the maximal electroshock seizure test. In the PTZ-kindling model in rats, useful for testing antiepileptogenic activities, Brilliant Blue G and tanshinone exhibited a moderate retarding effect, whereas the potent P2X7R blocker AFC-5128 and JNJ-47965567 showed a significant and long-lasting delay in kindling development. In fully kindled rats, the investigated compounds revealed modest effects to reduce the mean seizure stage. Furthermore, AFC-5128- and JNJ-47965567-treated animals displayed strongly reduced Iba 1 and GFAP immunoreactivity in the hippocampal CA3 region. In summary, our results show that P2X7R antagonists possess no remarkable anticonvulsant effects in the used acute screening tests, but can attenuate chemically-induced kindling. Further studies would be of interest to support the concept that P2X7R signalling plays a crucial role in the pathogenesis of epileptic disorders.
Collapse
Affiliation(s)
- Wolfgang Fischer
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Leipzig, Germany
- * E-mail:
| | - Heike Franke
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Ute Krügel
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Leipzig, Germany
| | | | - Klaus Dinkel
- Lead Discovery Center GmbH, Dortmund, Germany
- Affectis Pharmaceutical AG, Dortmund, Germany
| | - Brian Lord
- Neuroscience Therapeutic Area, Janssen Research & Development, LLC, San Diego, California, United States of America
| | - Michael A. Letavic
- Neuroscience Therapeutic Area, Janssen Research & Development, LLC, San Diego, California, United States of America
| | - David C. Henshall
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Tobias Engel
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| |
Collapse
|
49
|
Song TT, Li D, Huang SP, Yang L, Wang XY, Jiang YS, Liu Y. [Effects of cyclooxygenase-2 selective inhibitor celecoxib on the expression of major vault protein in rats with status epilepticus]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2016; 18:440-445. [PMID: 27165595 PMCID: PMC7390368 DOI: 10.7499/j.issn.1008-8830.2016.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To study the effect of cyclooxygenase -2 selective inhibitor celecoxib on the expression of major vault protein ( MVP) in the brain of rats with status epilepticus and its possible roles in the treatment of refractory epilepsy. METHODS Sixty adult male Sprague-Dawley rats were randomly assigned to blank control (n=16), epilepsy model (n=22) and celecoxib treatment groups (n=22). After the status epilepticus was induced in rats by injecting lithium and pilocarpine, each group had 16 rats enrolled as subjects. Immunohistochemical method and Western blot method were used to detect the expression of MVP in the frontal cortex and hippocampus. RESULTS The expression of MVP was significantly higher in the epilepsy model group than in the control group (P<0.01). The expression of MVP in the celecoxib treatment group was significantly decreased compared with the epilepsy model group, but it was still higher than in the control group (P<0.01). CONCLUSIONS Celecoxib could decrease the expression of MVP in brain tissue of rats with status epilepticus, suggesting that it is promising for the treatment of intractable epilepsy.
Collapse
Affiliation(s)
- Ting-Ting Song
- Department of Pediatrics, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China.
| | | | | | | | | | | | | |
Collapse
|
50
|
Dey A, Kang X, Qiu J, Du Y, Jiang J. Anti-Inflammatory Small Molecules To Treat Seizures and Epilepsy: From Bench to Bedside. Trends Pharmacol Sci 2016; 37:463-484. [PMID: 27062228 DOI: 10.1016/j.tips.2016.03.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 03/03/2016] [Accepted: 03/07/2016] [Indexed: 12/22/2022]
Abstract
As a crucial component of brain innate immunity, neuroinflammation initially contributes to neuronal tissue repair and maintenance. However, chronic inflammatory processes within the brain and associated blood-brain barrier (BBB) impairment often cause neurotoxicity and hyperexcitability. Mounting evidence points to a mutual facilitation between inflammation and epilepsy, suggesting that blocking the undesired inflammatory signaling within the brain might provide novel strategies to treat seizures and epilepsy. Neuroinflammation is primarily characterized by the upregulation of proinflammatory mediators in epileptogenic foci, among which cyclooxygenase-2 (COX-2)/prostaglandin E2 (PGE2), interleukin-1β (IL-1β), transforming growth factor-β (TGF-β), toll-like receptor 4 (TLR4), high-mobility group box 1 (HMGB1), and tumor necrosis factor-α (TNF-α) have been extensively studied. Small molecules that specifically target these key proinflammatory perpetrators have been evaluated for antiepileptic and antiepileptogenic effects in animal models. These important preclinical studies provide new insights into the regulation of inflammation in epileptic brains and guide drug discovery efforts aimed at developing novel anti-inflammatory therapies for seizures and epilepsy.
Collapse
Affiliation(s)
- Avijit Dey
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati Academic Health Center, Cincinnati, OH 45267-0514, USA
| | - Xu Kang
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati Academic Health Center, Cincinnati, OH 45267-0514, USA
| | - Jiange Qiu
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati Academic Health Center, Cincinnati, OH 45267-0514, USA
| | - Yifeng Du
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati Academic Health Center, Cincinnati, OH 45267-0514, USA
| | - Jianxiong Jiang
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati Academic Health Center, Cincinnati, OH 45267-0514, USA.
| |
Collapse
|