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Neuroinflammation and epilepsy

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https://www.readbyqxmd.com/read/27894304/brain-inflammation-is-accompanied-by-peripheral-inflammation-in-cstb-mice-a-model-for-progressive-myoclonus-epilepsy
#1
Olesya Okuneva, Zhilin Li, Inken Körber, Saara Tegelberg, Tarja Joensuu, Li Tian, Anna-Elina Lehesjoki
Progressive myoclonus epilepsy of Unverricht-Lundborg type (EPM1) is an autosomal recessively inherited childhood-onset neurodegenerative disorder, characterized by myoclonus, seizures, and ataxia. Mutations in the cystatin B gene (CSTB) underlie EPM1. The CSTB-deficient (Cstb (-/-) ) mouse model recapitulates key features of EPM1, including myoclonic seizures. The mice show early microglial activation that precedes seizure onset and neuronal loss and leads to neuroinflammation. We here characterized the inflammatory phenotype of Cstb (-/-) mice in more detail...
November 28, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27884611/microglial-positron-emission-tomography-pet-imaging-in-epilepsy-applications-opportunities-and-pitfalls
#2
Gregory Scott, Mohammad Mahmud, David R Owen, Michael R Johnson
Neuroinflammation is increasingly implicated in epileptogenesis and epilepsy. Microglia are an important mediator of central nervous system inflammation, and the development of positron emission tomography (PET) radioligands which bind the Translocator Protein (TSPO), an outer mitochondrial membrane protein expressed by microglia, has enabled in vivo measurement of neuroinflammation. Here, we outline the principles and potential pitfalls of TSPO PET imaging in relation to epilepsy, and opportunities for using TSPO imaging as a biomarker for future anti-inflammatory based therapeutics in epilepsy...
November 13, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27836391/diagnosing-and-treating-depression-in-epilepsy
#3
Christian E Elger, Samantha A Johnston, Christian Hoppe
At least one third of patients with active epilepsy suffer from significant impairment of their emotional well-being. A targeted examination for possible depression (irrespective of any social, financial or personal burdens) can identify patients who may benefit from medical attention and therapeutic support. Reliable screening instruments such as the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E) are suitable for the timely identification of patients needing help. Neurologists should be capable of managing mild to moderate comorbid depression but referral to mental health specialists is mandatory in severe and difficult-to-treat depression, or if the patient is acutely suicidal...
October 31, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27823573/the-sphingosine-1-phosphate-signaling-pathway-in-epilepsy-a-possible-role-for-the-immunomodulator-drug-fingolimod-in-epilepsy-treatment
#4
Antonio Leo, Rita Citraro, Rosario Marra, Ernesto Palma, Eugenio Donato Di Paola, Andrew Constanti, Giovambattista De Sarro, Emilio Russo
It is currently known that erythrocytes are the major source of sphingosine 1-phosphate (S1P) in the body. S1P acts both extracellularly as a cellular mediator and intracellularly as an important second messenger molecule. Its effects are mediated by interaction with five specific types of G protein-coupled S1P receptor. Fingolimod, is a recognized modulator of S1P receptors, and is the first orally active disease-modifying therapy that has been approved for the treatment of multiple sclerosis. Magnetic resonance imaging data suggest that fingolimod may be effective in multiple sclerosis MS by preventing blood-brain barrier disruption and brain atrophy...
November 4, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27770579/febrile-infection-related-epilepsy-syndrome-treated-with-anakinra
#5
Daniel L Kenney-Jung, Annamaria Vezzani, Robert J Kahoud, Reghann G LaFrance-Corey, Mai-Lan Ho, Theresa Wampler Muskardin, Elaine C Wirrell, Charles L Howe, Eric T Payne
Febrile infection-related epilepsy syndrome (FIRES) is a devastating epileptic encephalopathy with limited treatment options and an unclear etiology. Anakinra is a recombinant version of the human interleukin-1 receptor antagonist used to treat autoinflammatory disorders. This is the first report of anakinra for treatment of a child with super-refractory status epilepticus secondary to FIRES. Anakinra was well tolerated and effective. Cerebral spinal fluid analysis revealed elevated levels of proinflammatory cytokines before treatment that normalized on anakinra, suggesting a potential pathogenic role for neuroinflammation in FIRES...
October 22, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/27761920/isoflurane-prevents-acquired-epilepsy-in-rat-models-of-temporal-lobe-epilepsy
#6
Guy Bar-Klein, Rebecca Klee, Claudia Brandt, Marion Bankstahl, Pablo Bascuñana, Kathrin Töllner, Hotjensa Dalipaj, Jens P Bankstahl, Alon Friedman, Wolfgang Löscher
OBJECTIVE: Acquired epilepsy is a devastating long-term risk of various brain insults, including trauma, stroke, infections, and status epilepticus (SE). There is no preventive treatment for patients at risk. Due to the complex alterations involved in epileptogenesis, it is likely that multi-targeted approaches are required for epilepsy prevention. We report novel preclinical findings with isoflurane, which exerts various non-anesthetic effects that may be relevant for anti-epileptogenesis...
October 19, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/27693857/neuroprotective-mechanism-of-coenzyme-q10-coq10-against-ptz-induced-kindling-and-associated-cognitive-dysfunction-possible-role-of-microglia-inhibition
#7
Manveen Bhardwaj, Anil Kumar
BACKGROUND: Neuroinflammation, oxidative stress and mitochondrial dysfunction play a significant role to explain the pathophysiology of epilepsy. Neuroinflammation through microglia activation has been documented in epileptogenesis. Compounds which inhibit activation of glial cells have been suggested as one of the treatment approaches for the effective treatment of epilepsy. The present study has been designed to investigate the role of coenzyme Q10 and its interaction with minocycline (microglia inhibitor) against pentylenetetrazol (PTZ) induced kindling epilepsy...
December 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27664950/anticonvulsant-and-neuroprotective-effects-of-apelin-13-on-pentylenetetrazole-induced-seizures-in-male-rats
#8
Taj Pari Kalantaripour, Saeed Esmaeili-Mahani, Vahid Sheibani, Majid Asadi-Shekaari, Hamzeh Pasban-Aliabadi
Epilepsy is a common neurological disorder with no effective treatment or cure. Neuropeptide apelin is an endogenous ligand of angiotensin receptor-like 1 (APJ). It has been shown that apelin has protective and anti-neurodegenerative properties. This study was designed to evaluate the effect of apelin-13 on pentylenetetrazole (PTZ)-induced rat model of seizure. Adult male Wistar rats were divided into the experimental groups as follows: control group receiving PTZ; apelin-treated group which received apelin-13 before PTZ; apelin+F13A-treated group which received apelin-13 plus the apelin receptor antagonist (F13A) before PTZ; apelin+naloxone group which received apelin-13+naloxone before PTZ...
September 21, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27659220/pharmacological-modulation-in-mesial-temporal-lobe-epilepsy-current-status-and-future-perspectives
#9
Antonio Gambardella, Angelo Labate, Pierangelo Cifelli, Gabriele Ruffolo, Laura Mumoli, Eleonora Aronica, Eleonora Palma
Mesial temporal lobe epilepsy (MTLE) is frequently associated with hippocampal sclerosis (Hs), possibly caused by a primary brain injury that occurs a long time before the appearance of neurological symptoms. MTLE-Hs is, however, a heterogeneous condition that evolves with time, involving both environmental and genetic components. Recent experimental studies emphasize that drugs or drug combinations that target modulation and circuitry reorganization of the epileptogenic networks favorably modify the complex molecular and cellular alterations underlying MTLE...
September 19, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27604735/animal-models-of-posttraumatic-seizures-and-epilepsy
#10
Alexander V Glushakov, Olena Y Glushakova, Sylvain Doré, Paul R Carney, Ronald L Hayes
Posttraumatic epilepsy (PTE) is one of the most common and devastating complications of traumatic brain injury (TBI). Currently, the etiopathology and mechanisms of PTE are poorly understood and as a result, there is no effective treatment or means to prevent it. Antiepileptic drugs remain common preventive strategies in the management of TBI to control acute posttraumatic seizures and to prevent the development of PTE, although their efficacy in the latter case is disputed. Different strategies of PTE prophylaxis have been showing promise in preclinical models, but their translation to the clinic still remains elusive due in part to the variability of these models and the fact they do not recapitulate all complex pathologies associated with human TBI...
2016: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27601660/infiltrating-monocytes-promote-brain-inflammation-and-exacerbate-neuronal-damage-after-status-epilepticus
#11
Nicholas H Varvel, Jonas J Neher, Andrea Bosch, Wenyi Wang, Richard M Ransohoff, Richard J Miller, Raymond Dingledine
The generalized seizures of status epilepticus (SE) trigger a series of molecular and cellular events that produce cognitive deficits and can culminate in the development of epilepsy. Known early events include opening of the blood-brain barrier (BBB) and astrocytosis accompanied by activation of brain microglia. Whereas circulating monocytes do not infiltrate the healthy CNS, monocytes can enter the brain in response to injury and contribute to the immune response. We examined the cellular components of innate immune inflammation in the days following SE by discriminating microglia vs...
September 20, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27486046/inflammasomes-link-vascular-disease-with-neuroinflammation-and-brain-disorders
#12
REVIEW
Nikolett Lénárt, David Brough, Ádám Dénes
The role of inflammation in neurological disorders is increasingly recognised. Inflammatory processes are associated with the aetiology and clinical progression of migraine, psychiatric conditions, epilepsy, cerebrovascular diseases, dementia and neurodegeneration, such as seen in Alzheimer's or Parkinson's disease. Both central and systemic inflammatory actions have been linked with the development of brain diseases, suggesting that complex neuro-immune interactions could contribute to pathological changes in the brain across multiple temporal and spatial scales...
October 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27381590/transient-and-chronic-seizure-induced-inflammation-in-human-focal-epilepsy
#13
Tracy Butler, Yi Li, Wai Tsui, Daniel Friedman, Anat Maoz, Xiuyuan Wang, Patrick Harvey, Emily Tanzi, Simon Morim, Yeona Kang, Lisa Mosconi, Delia Talos, Ruben Kuzniecky, Shankar Vallhabjosula, Thomas Thesen, Lidia Glodzik, Masanori Ichise, David Silbersweig, Emily Stern, Mony J de Leon, Jacqueline French
In animal models, inflammation is both a cause and consequence of seizures. Less is known about the role of inflammation in human epilepsy. We performed positron emission tomography (PET) using a radiotracer sensitive to brain inflammation in a patient with frontal epilepsy ~36 h after a seizure as well as during a seizure-free period. When statistically compared to a group of 12 matched controls, both of the patient's scans identified a frontal (supplementary motor area) region of increased inflammation corresponding to his clinically defined seizure focus, but the postseizure scan showed significantly greater inflammation intensity and spatial extent...
September 2016: Epilepsia
https://www.readbyqxmd.com/read/27323783/matrix-metalloproteinases-in-the-brain-and-blood-brain-barrier-versatile-breakers-and-makers
#14
REVIEW
Ralf G Rempe, Anika Ms Hartz, Björn Bauer
Matrix metalloproteinases are versatile endopeptidases with many different functions in the body in health and disease. In the brain, matrix metalloproteinases are critical for tissue formation, neuronal network remodeling, and blood-brain barrier integrity. Many reviews have been published on matrix metalloproteinases before, most of which focus on the two best studied matrix metalloproteinases, the gelatinases MMP-2 and MMP-9, and their role in one or two diseases. In this review, we provide a broad overview of the role various matrix metalloproteinases play in brain disorders...
September 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27259217/-regulation-of-neurogenesis-factors-affecting-of-new-neurons-formation-in-adult-mammals-brain
#15
REVIEW
Michalina Respondek, Ewa Buszman
Neurogenesis is a complex and multi-step process of generating completely functional neurons. This process in adult brain is based on pluripotentional neuronal stem cells (NSC), which are able to proliferation and differentiation into mature neurons or glial cells. NSC are located in subgranular zone inside hippocampus and in subventricular zone. The new neurons formation depends on many endo- and exogenous factors which modulate each step of neurogenesis. This article describes the most important regulators of adult neurogenesis, mainly: neurotrophins, growth factors, hormones, neurotransmitters and microenvironment of NSC...
2015: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/27251615/transient-p2x7-receptor-antagonism-produces-lasting-reductions-in-spontaneous-seizures-and-gliosis-in-experimental-temporal-lobe-epilepsy
#16
Alba Jimenez-Pacheco, Miguel Diaz-Hernandez, Marina Arribas-Blázquez, Amaya Sanz-Rodriguez, Luis A Olivos-Oré, Antonio R Artalejo, Mariana Alves, Michael Letavic, M Teresa Miras-Portugal, Ronan M Conroy, Norman Delanty, Michael A Farrell, Donncha F O'Brien, Anindya Bhattacharya, Tobias Engel, David C Henshall
UNLABELLED: Neuroinflammation is thought to contribute to the pathogenesis and maintenance of temporal lobe epilepsy, but the underlying cell and molecular mechanisms are not fully understood. The P2X7 receptor is an ionotropic receptor predominantly expressed on the surface of microglia, although neuronal expression has also been reported. The receptor is activated by the release of ATP from intracellular sources that occurs during neurodegeneration, leading to microglial activation and inflammasome-mediated interleukin 1β release that contributes to neuroinflammation...
June 1, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27208748/1400w-a-highly-selective-inducible-nitric-oxide-synthase-inhibitor-is-a-potential-disease-modifier-in-the-rat-kainate-model-of-temporal-lobe-epilepsy
#17
Sreekanth Puttachary, Shaunik Sharma, Saurabh Verma, Yang Yang, Marson Putra, Achala Thippeswamy, Diou Luo, Thimmasettappa Thippeswamy
Status epilepticus (SE) initiates epileptogenesis to transform normal brain to epileptic state which is characterized by spontaneous recurrent seizures (SRS). Prior to SRS, progressive changes occur in the brain soon after SE, for example, loss of blood-brain barrier (BBB) integrity, neuronal hyper-excitability (epileptiform spiking), neuroinflammation [reactive gliosis, high levels of reactive oxygen/nitrogen species (ROS/RNS)], neurodegeneration and synaptic re-organization. Our hypothesis was that modification of early epileptogenic events will alter the course of disease development and its progression...
September 2016: Neurobiology of Disease
https://www.readbyqxmd.com/read/27207608/involvement-of-micrornas-in-epileptogenesis
#18
REVIEW
Adriano A Cattani, Camille Allene, Volker Seifert, Felix Rosenow, David C Henshall, Thomas M Freiman
Patients who have sustained brain injury or had developmental brain lesions present a non-negligible risk for developing delayed epilepsy. Finding therapeutic strategies to prevent development of epilepsy in at-risk patients represents a crucial medical challenge. Noncoding microRNA molecules (miRNAs) are promising candidates in this area. Indeed, deregulation of diverse brain-specific miRNAs has been observed in animal models of epilepsy as well as in patients with epilepsy, mostly in temporal lobe epilepsy (TLE)...
July 2016: Epilepsia
https://www.readbyqxmd.com/read/27190492/histamine-and-immune-biomarkers-in-cns-disorders
#19
REVIEW
Ramón Cacabelos, Clara Torrellas, Lucía Fernández-Novoa, Francisco López-Muñoz
Neuroimmune dysregulation is a common phenomenon in different forms of central nervous system (CNS) disorders. Cross-links between central and peripheral immune mechanisms appear to be disrupted as reflected by a series of immune markers (CD3, CD4, CD7, HLA-DR, CD25, CD28, and CD56) which show variability in brain disorders such as anxiety, depression, psychosis, stroke, Alzheimer's disease, Parkinson's disease, attention-deficit hyperactivity disorder, migraine, epilepsy, vascular dementia, mental retardation, cerebrovascular encephalopathy, multiple sclerosis, brain tumors, cranial nerve neuropathies, mental retardation, and posttraumatic brain injury...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27189853/microglia-neuron-communication-in-epilepsy
#20
REVIEW
Ukpong B Eyo, Madhuvika Murugan, Long-Jun Wu
Epilepsy has remained a significant social concern and financial burden globally. Current therapeutic strategies are based primarily on neurocentric mechanisms that have not proven successful in at least a third of patients, raising the need for novel alternative and complementary approaches. Recent evidence implicates glial cells and neuroinflammation in the pathogenesis of epilepsy with the promise of targeting these cells to complement existing strategies. Specifically, microglial involvement, as a major inflammatory cell in the epileptic brain, has been poorly studied...
January 2017: Glia
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