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Gonçalves-Sánchez J, Sancho C, López DE, Castellano O, García-Cenador B, Servilha-Menezes G, Corchado JM, García-Cairasco N, Gonçalves-Estella JM. Effect of Vagus Nerve Stimulation on the GASH/Sal Audiogenic-Seizure-Prone Hamster. Int J Mol Sci 2023; 25:91. [PMID: 38203262 PMCID: PMC10778912 DOI: 10.3390/ijms25010091] [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: 11/15/2023] [Revised: 12/10/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
Vagus nerve stimulation (VNS) is an adjuvant neuromodulation therapy for the treatment of refractory epilepsy. However, the mechanisms behind its effectiveness are not fully understood. Our aim was to develop a VNS protocol for the Genetic Audiogenic Seizure Hamster from Salamanca (GASH/Sal) in order to evaluate the mechanisms of action of the therapy. The rodents were subject to VNS for 14 days using clinical stimulation parameters by implanting a clinically available neurostimulation device or our own prototype for laboratory animals. The neuroethological assessment of seizures and general behavior were performed before surgery, and after 7, 10, and 14 days of VNS. Moreover, potential side effects were examined. Finally, the expression of 23 inflammatory markers in plasma and the left-brain hemisphere was evaluated. VNS significantly reduced seizure severity in GASH/Sal without side effects. No differences were observed between the neurostimulation devices. GASH/Sal treated with VNS showed statistically significant reduced levels of interleukin IL-1β, monocyte chemoattractant protein MCP-1, matrix metalloproteinases (MMP-2, MMP-3), and tumor necrosis factor TNF-α in the brain. The described experimental design allows for the study of VNS effects and mechanisms of action using an implantable device. This was achieved in a model of convulsive seizures in which VNS is effective and shows an anti-inflammatory effect.
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Affiliation(s)
- Jaime Gonçalves-Sánchez
- Department of Cellular Biology and Pathology, School of Medicine, University of Salamanca, 37007 Salamanca, Spain; (D.E.L.); (O.C.)
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Institute of Neuroscience of Castilla y León, 37007 Salamanca, Spain
| | - Consuelo Sancho
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Institute of Neuroscience of Castilla y León, 37007 Salamanca, Spain
- Department of Physiology and Pharmacology, School of Medicine, University of Salamanca, 37007 Salamanca, Spain
| | - Dolores E. López
- Department of Cellular Biology and Pathology, School of Medicine, University of Salamanca, 37007 Salamanca, Spain; (D.E.L.); (O.C.)
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Institute of Neuroscience of Castilla y León, 37007 Salamanca, Spain
| | - Orlando Castellano
- Department of Cellular Biology and Pathology, School of Medicine, University of Salamanca, 37007 Salamanca, Spain; (D.E.L.); (O.C.)
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Institute of Neuroscience of Castilla y León, 37007 Salamanca, Spain
| | - Begoña García-Cenador
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Department of Surgery, School of Medicine, University of Salamanca, 37007 Salamanca, Spain
| | - Gabriel Servilha-Menezes
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14040-900, SP, Brazil; (G.S.-M.); (N.G.-C.)
| | - Juan M. Corchado
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Bioinformatics, Intelligent Systems and Educational Technology (BISITE) Research Group, 37007 Salamanca, Spain
| | - Norberto García-Cairasco
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14040-900, SP, Brazil; (G.S.-M.); (N.G.-C.)
| | - Jesús M. Gonçalves-Estella
- Institute for Biomedical Research of Salamanca (IBSAL), 37007 Salamanca, Spain; (C.S.); (B.G.-C.); (J.M.C.); (J.M.G.-E.)
- Department of Surgery, School of Medicine, University of Salamanca, 37007 Salamanca, Spain
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Broncel A, Bocian R, Konopacki J. Vagal Nerve Stimulation: The Effect on the Brain Oscillatory Field Potential. Neuroscience 2021; 483:127-138. [PMID: 34952159 DOI: 10.1016/j.neuroscience.2021.12.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/03/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
Abstract
More than thirty years of medical treatment with the use of vagal nerve stimulation (VNS) has shown that this therapeutic procedure works in a number of homeostatic disturbances. Although the clinical usage of VNS has a long history, our knowledge about the central mechanisms underlying this treatment is still limited. In the present paper we review the effects of VNS on brain oscillations as a possible electrophysiological bio-marker of VNS efficacy. The review was prepared mainly on the basis of data delivered from clinical observations and the outcomes of electrophysiological experiments conducted on laboratory animals that are available in PubMed. We consciously did not focus on epileptiform activity understood as a pathologic oscillatory activity, which was widely discussed in the numerous previously published reviews. The main conclusion of the present paper is that further, well-designed experiments on laboratory animals are absolutely necessary to address the electrophysiological issues. These will fill a number of gaps in our present knowledge of the central mechanisms underlying VNS therapy.
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Affiliation(s)
- Adam Broncel
- Medical Technology Centre, Natolin 15, 92-701 Lodz, Poland.
| | - Renata Bocian
- Department of Neurobiology, Faculty of Biology and Environmental Protection, The University of Lodz, Pomorska St. No. 141/143, 90-236 Lodz, Poland.
| | - Jan Konopacki
- Department of Neurobiology, Faculty of Biology and Environmental Protection, The University of Lodz, Pomorska St. No. 141/143, 90-236 Lodz, Poland.
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Berger A, Vespa S, Dricot L, Dumoulin M, Iachim E, Doguet P, Vandewalle G, El Tahry R. How Is the Norepinephrine System Involved in the Antiepileptic Effects of Vagus Nerve Stimulation? Front Neurosci 2021; 15:790943. [PMID: 34924947 PMCID: PMC8675889 DOI: 10.3389/fnins.2021.790943] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/11/2021] [Indexed: 01/09/2023] Open
Abstract
Vagus Nerve Stimulation (VNS) is an adjunctive treatment for patients suffering from inoperable drug-resistant epilepsy. Although a complete understanding of the mediators involved in the antiepileptic effects of VNS and their complex interactions is lacking, VNS is known to trigger the release of neurotransmitters that have seizure-suppressing effects. In particular, norepinephrine (NE) is a neurotransmitter that has been associated with the clinical effects of VNS by preventing seizure development and by inducing long-term plastic changes that could restore a normal function of the brain circuitry. However, the biological requisites to become responder to VNS are still unknown. In this review, we report evidence of the critical involvement of NE in the antiepileptic effects of VNS in rodents and humans. Moreover, we emphasize the hypothesis that the functional integrity of the noradrenergic system could be a determining factor to obtain clinical benefits from the therapy. Finally, encouraging avenues of research involving NE in VNS treatment are discussed. These could lead to the personalization of the stimulation parameters to maximize the antiepileptic effects and potentially improve the response rate to the therapy.
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Affiliation(s)
- Alexandre Berger
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.,Synergia Medical SA, Mont-Saint-Guibert, Belgium.,GIGA-Cyclotron Research Center-In Vivo Imaging, University of Liège, Liège, Belgium
| | - Simone Vespa
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Laurence Dricot
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Manon Dumoulin
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Evelina Iachim
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.,Department of Pediatric Neurology, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | | | - Gilles Vandewalle
- GIGA-Cyclotron Research Center-In Vivo Imaging, University of Liège, Liège, Belgium
| | - Riëm El Tahry
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.,Center for Refractory Epilepsy, Department of Neurology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
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Ramkissoon CM, Güemes A, Vehi J. Overview of therapeutic applications of non-invasive vagus nerve stimulation: a motivation for novel treatments for systemic lupus erythematosus. Bioelectron Med 2021; 7:8. [PMID: 34030736 PMCID: PMC8145832 DOI: 10.1186/s42234-021-00069-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 04/28/2021] [Indexed: 02/07/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic systemic autoimmune disorder that commonly affects the skin, joints, kidneys, and central nervous system. Although great progress has been made over the years, patients still experience unfavorable secondary effects from medications, increased economic burden, and higher mortality rates compared to the general population. To alleviate these current problems, non-invasive, non-pharmacological interventions are being increasingly investigated. One such intervention is non-invasive vagus nerve stimulation, which promotes the upregulation of the cholinergic anti-inflammatory pathway that reduces the activation and production of pro-inflammatory cytokines and reactive oxygen species, culpable processes in autoimmune diseases such as SLE. This review first provides a background on the important contribution of the autonomic nervous system to the pathogenesis of SLE. The gross and structural anatomy of the vagus nerve and its contribution to the inflammatory response are described afterwards to provide a general understanding of the impact of stimulating the vagus nerve. Finally, an overview of current clinical applications of invasive and non-invasive vagus nerve stimulation for a variety of diseases, including those with similar symptoms to the ones in SLE, is presented and discussed. Overall, the review presents neuromodulation as a promising strategy to alleviate SLE symptoms and potentially reverse the disease.
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Affiliation(s)
| | - Amparo Güemes
- Bio-Inspired Technology, Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London, UK
| | - Josep Vehi
- Institut d’Informàtica i Aplicacions, Universitat de Girona, Girona, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Madrid, Spain
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Vlaicu A, Bustuchina Vlaicu M. Vagus nerve stimulation for treatment-resistant depression: is this therapy distinct from other antidepressant treatments? Int J Psychiatry Clin Pract 2020; 24:349-356. [PMID: 32677482 DOI: 10.1080/13651501.2020.1779751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND The treatment-resistant depression (TRD) is a very disabling disease. OBJECTIVE The aim of this article is to provide an overview of the therapeutic activity of vagus nerve stimulation (VNS) therapy system in TRD. We summarised the progress made during the last decade in this area. METHODS We conducted a non-systematic review on the efficacy and safety of the VNS therapy for this disease. We analysed the results from acute and long-term studies that utilised this technique. Major electronic databases were searched. RESULTS The patients with TRD may show acute and long-term benefit when treated with this technique. There are promising results for VNS therapy for these patients. The level of evidence as an acute treatment option is only 3, but as chronic treatment is 2. This therapy should be offered as an added long-term treatment option for patients with chronic and recurrent difficult to treat depression. CONCLUSIONS The antidepressant effects of this procedure remain controversial. The clinical trials have produced mixed results, but VNS therapy for TRD has two distinct features that differentiate it from other antidepressant treatments: a sustained therapeutic response obtained in highly resistant depressive disorders, a favourable safety profile and guaranteed compliance.
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Affiliation(s)
- Andrei Vlaicu
- Service of Psychiatry, Hospital Andre Breton, Saint-Dizier, France
| | - Mihaela Bustuchina Vlaicu
- Neurosurgery Department, Hospital Pitié Salpêtrière, Paris, France.,INSERM, U955, The Translational Psychiatry Laboratory, Créteil, France
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Identification of vagus nerve stimulation parameters affecting rat hippocampal electrophysiology without temperature effects. Brain Stimul 2020; 13:1198-1206. [PMID: 32454214 DOI: 10.1016/j.brs.2020.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/16/2020] [Accepted: 05/12/2020] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Recent experiments in rats have demonstrated significant effects of VNS on hippocampal excitability but were partially attributed to hypothermia, induced by the applied VNS parameters. OBJECTIVE To allow meaningful preclinical research on the mechanisms of VNS and translation of rodent results to clinical VNS trials, we aimed to identify non-hypothermia inducing VNS parameters that significantly affect hippocampal excitability. METHODS VNS was administered in cycles of 30 s including either 0.1, 0.16, 0.25, 0.5, 1.5, 3 or 7 s of VNS ON time (biphasic pulses, 250μs/phase, 1 mA, 30 Hz) and the effect of different VNS ON times on brain temperature was evaluated. VNS paradigms with and without hypothermia were compared for their effects on hippocampal neurophysiology in freely moving rats. RESULTS Using VNS parameters with an ON time/OFF time of up to 0.5 s/30 s did not cause hypothermia, while clear hypothermia was detected with ON times of 1.5, 3 and 7 s/30 s. Relative to SHAM VNS, the normothermic 0.5 s VNS condition significantly decreased hippocampal EEG power and changed dentate gyrus evoked potentials with an increased field excitatory postsynaptic potential slope and a decreased population spike amplitude. CONCLUSION VNS can be administered in freely moving rats without causing hypothermia, while profoundly affecting hippocampal neurophysiology suggestive of reduced excitability of hippocampal neurons despite increased synaptic transmission efficiency.
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Childs JE, Kim S, Driskill CM, Hsiu E, Kroener S. Vagus nerve stimulation during extinction learning reduces conditioned place preference and context-induced reinstatement of cocaine seeking. Brain Stimul 2019; 12:1448-1455. [PMID: 31289015 PMCID: PMC10766375 DOI: 10.1016/j.brs.2019.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/26/2019] [Accepted: 07/01/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Drug use causes the formation of strong cue/reward associations which persist long after cessation of drug-taking and contribute to the long-term risk of relapse. Extinguishing these associations may reduce cue-induced craving and relapse. Previously, we found that pairing vagus nerve stimulation (VNS) with extinction of cocaine self-administration reduces cue-induced reinstatement; however, it remains unclear whether this was primarily caused by extinguishing the context, the instrumental response, or both. OBJECTIVE Hypothesis: We hypothesized that VNS can facilitate the extinction of both contextual cues and instrumental responding. METHODS Extinction of context was first tested using Pavlovian conditioned place preference (CPP). Next, the impact of VNS on the extinction of instrumental responding was assessed under ABA and AAA context conditions. In each extinction context separate groups of rats were either provided the opportunity to perform the instrumental response, or the levers were retracted for the duration of extinction training. Reinstatement was induced by reintroduction of the conditioned stimuli and/or the drug-paired context. Data were analyzed using one-way or two-way repeated measures ANOVAs. RESULTS VNS during extinction reduced reinstatement of CPP. VNS also reduced cue- and context-induced reinstatement of the instrumental response under both AAA and ABA conditions. The subjects' ability to engage with the lever during extinction was crucial for this effect. P values < 0.05 were considered significant. CONCLUSIONS Craving occurs in response to a range of conditioned stimuli and contexts; VNS may improve outcomes of behavioral therapy by facilitating extinction of both an instrumental response and/or contextual cues.
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Affiliation(s)
- Jessica E Childs
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, 800 West Campbell Rd., Richardson, TX, 75080, USA
| | - Suhyeong Kim
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, 800 West Campbell Rd., Richardson, TX, 75080, USA
| | - Christopher M Driskill
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, 800 West Campbell Rd., Richardson, TX, 75080, USA
| | - Emily Hsiu
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, 800 West Campbell Rd., Richardson, TX, 75080, USA
| | - Sven Kroener
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, 800 West Campbell Rd., Richardson, TX, 75080, USA.
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Katagiri M, Iida K, Ishihara K, Nair D, Harada K, Kagawa K, Seyama G, Hashizume A, Kuramoto T, Hanaya R, Arita K, Kurisu K. Anti-seizure effect and neuronal activity change in the genetic-epileptic model rat with acute and chronic vagus nerve stimulation. Epilepsy Res 2019; 155:106159. [PMID: 31277035 DOI: 10.1016/j.eplepsyres.2019.106159] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 06/14/2019] [Accepted: 06/24/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND VNS showed time-dependent anti-seizure effect. However, the precise mechanism of VNS in acute and chronic anti-seizure effect has not been fully elucidated. Noda epileptic rat (NER) is genetic epilepsy model rat which exhibits spontaneous generalized tonic-clonic seizure (GTC) approximately once per 30 h and frequent dialeptic seizure (DS). We performed acute and chronic VNS on NER to focus on the acute and chronic anti-epileptic effect and neuronal activity change by VNS. METHODS We performed acute VNS (2 h) on 22 NERs (VNS, n = 11, control, n = 11), then subsequently administered chronic (4 weeks) VNS on 10 of 22 NERs (VNS n = 5, control n = 5). We evaluated the acute and chronic anti-seizure effects of VNS on GTC and DS by behavioral and electroencephalographical observation (2 h every week). We carried out double immunofluorescence for biomarkers of short-term (c-Fos) and long-term (ΔFosB) neuronal activation to map regions in the brain that were activated by acute (VNS n = 6, control n = 6) or chronic VNS (VNS n = 5, control n = 5). Furthermore, we performed chronic VNS (4 w) on 12 NERs (VNS n = 6, control n = 6) with long-term observation (8 h a day, 5d per week) to obtain an adequate number of GTCs to elucidate the time dependent anti-epileptic effect on GTC. RESULTS Acute VNS treatment reduced GTC seizure frequency and total duration of the DS. Chronic VNS resulted in a time-dependent reduction of DS frequency and duration. However, chronic VNS did not show time-dependent reduction of GTC frequency. There were significant c-Fos expressions in the central medial nucleus (CM), mediodorsal thalamic nucleus (MDM), locus coeruleus (LC), and nucleus of solitary tract (NTS) after acute VNS. And there were significant ΔFosB expressions in the lateral septal nucleus (LSV), medial septal nucleus (MSV), MDM, and pontine reticular nucleus caudal (PnC) after chronic VNS. Any decrease in frequency of GTCs by chronic VNS could not be confirmed even with long-term observation. CONCLUSION We confirmed acute VNS significantly reduced the frequency of GTC and duration of DS. Chronic VNS decreased the frequency and duration of DS in a time-dependent manner. The brainstem and midline thalamus were activated after acute and chronic VNS. The forebrain was activated only after chronic VNS.
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Affiliation(s)
- Masaya Katagiri
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.
| | - Koji Iida
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Kumatoshi Ishihara
- Laboratory of Neuropharmacology, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1, Hirokoshingai, Kure, 737-0112, Japan.
| | - Dileep Nair
- Epilepsy Center, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.
| | - Kana Harada
- Laboratory of Neuropharmacology, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1, Hirokoshingai, Kure, 737-0112, Japan.
| | - Kota Kagawa
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Go Seyama
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Akira Hashizume
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan; Epilepsy Center, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Takashi Kuramoto
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Yoshida-Konoe cho, 606-8501, Kyoto, Japan.
| | - Ryosuke Hanaya
- Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, 890-8520, Japan.
| | - Kazunori Arita
- Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1, Sakuragaoka, Kagoshima, 890-8520, Japan.
| | - Kaoru Kurisu
- Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
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Yaghouby F, Shafer B, Vasudevan S. A rodent model for long-term vagus nerve stimulation experiments. ACTA ACUST UNITED AC 2019. [DOI: 10.2217/bem-2019-0016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: Investigations into the benefits of vagus nerve stimulation (VNS) using rodents have led to promising findings for treating clinical disorders. However, the majority of research has been limited to acute timelines. We developed a rodent model for longitudinal assessment of VNS and validated it with a long-term experiment incorporating continuous physiological monitoring. While the primary aim was not to investigate the effects of VNS on the cardiovascular system, we analyzed cardiovascular parameters to demonstrate the model's capabilities in a long-term stimulation-and-recording setup. Materials & methods: Rats were implanted with a cuff electrode around the cervical vagus nerve and electrocardiogram monitoring devices were implanted in the peritoneal cavity. We also designed a connector mount for seamless access to the cuff electrode for VNS in awake-behaving rats. Results & conclusion: Results signified easy-to-interface VNS system, electrode robustness and discernible physiological signals in a long-term setup. Analysis of the cardiovascular parameters revealed some transient effects during VNS. Our proposed model enables long-term VNS experiments along with physiological monitoring in unanesthetized rats.
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Affiliation(s)
- Farid Yaghouby
- US Food & Drug Administration, Center for Devices & Radiological Health (CDRH), Office of Science & Engineering Laboratory (OSEL), Division of Biomedical Physics (DBP), Silver Spring, MD 20993, USA
| | - Benjamin Shafer
- US Food & Drug Administration, Center for Devices & Radiological Health (CDRH), Office of Science & Engineering Laboratory (OSEL), Division of Biomedical Physics (DBP), Silver Spring, MD 20993, USA
| | - Srikanth Vasudevan
- US Food & Drug Administration, Center for Devices & Radiological Health (CDRH), Office of Science & Engineering Laboratory (OSEL), Division of Biomedical Physics (DBP), Silver Spring, MD 20993, USA
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Effect of short-term transcutaneous trigeminal nerve stimulation on EEG activity in drug-resistant epilepsy. J Neurol Sci 2019; 400:90-96. [PMID: 30904691 DOI: 10.1016/j.jns.2019.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 02/08/2019] [Accepted: 03/09/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Transcutaneous trigeminal nerve stimulation (TNS) has antiepileptic effects in patients with drug-resistant epilepsy (DRE). However, whether and how TNS is able to modulate the electroencephalogram (EEG) background activity in patients with DRE is still unknown. OBJECTIVES To investigate the effect of short-term TNS on EEG background activity in DRE by qualitative and quantitative analyses. METHODS Twenty-nine DRE patients participated in the study. Twenty-two were randomly divided into a "sham-TNS" or "real-TNS" group; seven patients underwent stimulation of the median nerve (MNS) at the wrist. Real-TNS was delivered bilaterally to the infraorbital nerve (trains of 1-20 mA, 120 Hz, cyclic modality for 20 min). The sham-TNS protocol mimicked the real-TNS one but at a zero intensity. For MNS, the same parameters as real-TNS were used. EEG was continuously acquired for 40 min: 10' pre, 20' during and 10' post stimulation. EEG was visually inspected for interictal epileptiform discharge (IEDs) changes and processed by spectral analysis for changes in mean frequency and absolute power of each frequency band. RESULTS A significant increase of EEG absolute alpha power was observed during real-TNS compared with the sham-TNS (F34,680 = 1.748; p = 0.006). Conversely, no significant effects were noticed either for quantitative analysis of other frequency bands or for IEDs detection. MNS proved unable to modulate EEG activity. CONCLUSIONS Short-term TNS induces an acute and specific effect on background EEG of DRE by increasing the absolute alpha band power. EEG alpha rhythm enhancement may index a cortical functional inhibition and act as a seizure-preventing mechanism.
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GABAergic mediation of hippocampal theta rhythm induced by stimulation of the vagal nerve. Brain Res Bull 2019; 147:110-123. [DOI: 10.1016/j.brainresbull.2019.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 02/18/2019] [Indexed: 12/22/2022]
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Kucia K, Merk W, Zapalowicz K, Medrala T. Vagus Nerve Stimulation For Treatment Resistant Depression: Case Series Of Six Patients - Retrospective Efficacy And Safety Observation After One Year Follow Up. Neuropsychiatr Dis Treat 2019; 15:3247-3254. [PMID: 31819452 PMCID: PMC6883943 DOI: 10.2147/ndt.s217816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/15/2019] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE One year observation and evaluation of the VNS (vagus nerve stimulation) efficacy and safety for patients with treatment resistant depression in Polish conditions. METHODS An open label, uncontrolled and one center retrospective study of VNS therapy was implemented with stable pharmacotherapy in 6 patients with treatment resistant depression (TRD). For the first 3 months, only VNS parameters were altered but the pharmacological treatment was unchanged and in the following 9 months, medication and VNS dosing parameters were altered according to the clinical state of the patients. RESULTS The baseline 24-item Hamilton Depression Rating Scale (HAMD-24) score averaged 24. Both response (>50% reduction in baseline scores) and remission rates after 3 months of treatment were only 40%. After 1 year of VNS therapy, the response rates increased to 86%. Most frequent side-effects were voice alteration (86% at 3 months of stimulation) and headaches (40%). CONCLUSION VNS treatment was safe and effective in TRD patients and its efficacy increased with time. Efficacy ratings are similar to the previously reported studies using a congenial protocol.
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Affiliation(s)
- Krzysztof Kucia
- Department of Psychiatry and Psychotherapy, School of Medicine in Katowice, Medical University of Silesia, GCM, Katowice 40-635, Poland
| | - Wojciech Merk
- Department of Psychiatry and Psychotherapy, School of Medicine in Katowice, Medical University of Silesia, GCM, Katowice 40-635, Poland
| | | | - Tomasz Medrala
- Department of Psychiatry and Psychotherapy, School of Medicine in Katowice, Medical University of Silesia, GCM, Katowice 40-635, Poland
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Broncel A, Bocian R, Kłos-Wojtczak P, Konopacki J. Medial septal cholinergic mediation of hippocampal theta rhythm induced by vagal nerve stimulation. PLoS One 2018; 13:e0206532. [PMID: 30395575 PMCID: PMC6218045 DOI: 10.1371/journal.pone.0206532] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 10/15/2018] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Electrical vagal nerve stimulation (VNS) has been used for years to treat patients with drug-resistant epilepsy. This technique also remains under investigation as a specific treatment of patients with Alzheimer's disease. Recently we discovered that VNS induced hippocampal formation (HPC) type II theta rhythm, which is involved in memory consolidation. In the present study, we have extended our previous observation and addressed the neuronal substrate and pharmacological profile of HPC type II theta rhythm induced by VNS in anesthetized rats. METHODS Male Wistar rats were implanted with a VNS cuff electrode around the left vagus nerve, a tungsten microelectrode for recording the HPC field activity, and a medial septal (MS) cannula for the injection of a local anesthetic, procaine, and muscarinic agents. A direct, brief effect of VNS on the HPC field potential was evaluated before and after medial-septal drug injection. RESULTS Medial septal injection of local anesthetic, procaine, reversibly abolished VNS-induced HPC theta rhythm. With the use of cholinergic muscarinic agonist and antagonists, we demonstrated that medial septal M1 receptors are involved in the mediation of the VNS effect on HPC theta field potential. CONCLUSION The MS cholinergic M1 receptor mechanism integrates not only central inputs from the brainstem synchronizing pathway, which underlies the production of HPC type II theta rhythm, but also the input from the vagal afferents in the brain stem.
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Affiliation(s)
| | - Renata Bocian
- Department of Neurobiology, Faculty of Biology and Environmental Protection, The University of Łódź, Łódź, Poland
| | - Paulina Kłos-Wojtczak
- Neuromedical, Research Department, Łódź, Poland
- Department of Neurobiology, Faculty of Biology and Environmental Protection, The University of Łódź, Łódź, Poland
| | - Jan Konopacki
- Department of Neurobiology, Faculty of Biology and Environmental Protection, The University of Łódź, Łódź, Poland
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Broncel A, Bocian R, Kłos-Wojtczak P, Konopacki J. Some technical issues of vagal nerve stimulation. An approach using a hippocampal formation theta rhythm. Brain Res Bull 2018; 140:402-410. [DOI: 10.1016/j.brainresbull.2018.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 04/25/2018] [Accepted: 05/04/2018] [Indexed: 01/22/2023]
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Lee S, Peh WYX, Wang J, Yang F, Ho JS, Thakor NV, Yen S, Lee C. Toward Bioelectronic Medicine-Neuromodulation of Small Peripheral Nerves Using Flexible Neural Clip. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1700149. [PMID: 29201608 PMCID: PMC5700646 DOI: 10.1002/advs.201700149] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 04/30/2017] [Indexed: 05/24/2023]
Abstract
Neural modulation technology and the capability to affect organ function have spawned the new field of bioelectronic medicine. Therapeutic interventions depend on wireless bioelectronic neural interfaces that can conformally and easily attach to small (few hundred micrometers) nerves located deep in the body without neural damage. Besides size, factors like flexibility and compliance to attach and adapt to visceral nerves associated moving organs are of paramount importance and have not been previously addressed. This study proposes a novel flexible neural clip (FNC) that can be used to interface with a variety of different peripheral nerves. To illustrate the flexibility of the design, this study stimulates the pelvic nerve, the vagus nerve, and branches of the sciatic nerve and evaluates the feasibility of the design in modulating the function of each of these nerves. It is found that this FNC allows fine-tuning of physiological processes such as micturition, heart rate, and muscle contractions. Furthermore, this study also tests the ability of wirelessly powered FNC to enable remote modulation of visceral pelvic nerves located deep in the body. These results show that the FNC can be used with a range of different nerves, providing one of the critical pieces in the field of bioelectronics medicines.
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Affiliation(s)
- Sanghoon Lee
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
- Center for Intelligent Sensors and MEMSNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
- NUS Suzhou Research Institute (NUSRI)Industrial ParkSuzhou215123P. R. China
| | - Wendy Yen Xian Peh
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
| | - Jiahui Wang
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
- Center for Intelligent Sensors and MEMSNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
- NUS Suzhou Research Institute (NUSRI)Industrial ParkSuzhou215123P. R. China
| | - Fengyuan Yang
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
| | - John S. Ho
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
| | - Nitish V. Thakor
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
- Graduate School for Integrative Science and EngineeringNational University of SingaporeSingapore117456Singapore
- Department of Biomedical EngineeringSchool of MedicineJohns Hopkins UniversityBaltimoreMD21205USA
| | - Shih‐Cheng Yen
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
| | - Chengkuo Lee
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117583Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐CORSingapore117456Singapore
- Center for Intelligent Sensors and MEMSNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
- NUS Suzhou Research Institute (NUSRI)Industrial ParkSuzhou215123P. R. China
- Graduate School for Integrative Science and EngineeringNational University of SingaporeSingapore117456Singapore
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Vagus nerve stimulation produces a hippocampal formation theta rhythm in anesthetized rats. Brain Res 2017; 1675:41-50. [DOI: 10.1016/j.brainres.2017.08.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/22/2017] [Accepted: 08/26/2017] [Indexed: 12/30/2022]
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17
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Chen SP, Ayata C. Novel Therapeutic Targets Against Spreading Depression. Headache 2017; 57:1340-1358. [PMID: 28842982 DOI: 10.1111/head.13154] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/07/2017] [Accepted: 05/08/2017] [Indexed: 12/11/2022]
Abstract
Migraine is among the most prevalent and disabling neurological diseases in the world. Cortical spreading depression (SD) is an intense wave of neuronal and glial depolarization underlying migraine aura, and a headache trigger, which has been used as an experimental platform for drug screening in migraine. Here, we provide an overview of novel therapeutic targets that show promise to suppress SD, such as acid-sensing ion channels, casein kinase Iδ, P2X7-pannexin 1 complex, and neuromodulation, and outline the experimental models and essential quality measures for rigorous and reproducible efficacy testing.
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Affiliation(s)
- Shih-Pin Chen
- Neurovascular Research Lab, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Cenk Ayata
- Neurovascular Research Lab, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Stroke Service and Neuroscience Intensive Care Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
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Abstract
Vagus nerve stimulation has recently been reported to improve symptoms of migraine. Cortical spreading depression is the electrophysiological event underlying migraine aura and is a trigger for headache. We tested whether vagus nerve stimulation inhibits cortical spreading depression to explain its antimigraine effect. Unilateral vagus nerve stimulation was delivered either noninvasively through the skin or directly by electrodes placed around the nerve. Systemic physiology was monitored throughout the study. Both noninvasive transcutaneous and invasive direct vagus nerve stimulations significantly suppressed spreading depression susceptibility in the occipital cortex in rats. The electrical stimulation threshold to evoke a spreading depression was elevated by more than 2-fold, the frequency of spreading depressions during continuous topical 1 M KCl was reduced by ∼40%, and propagation speed of spreading depression was reduced by ∼15%. This effect developed within 30 minutes after vagus nerve stimulation and persisted for more than 3 hours. Noninvasive transcutaneous vagus nerve stimulation was as efficacious as direct invasive vagus nerve stimulation, and the efficacy did not differ between the ipsilateral and contralateral hemispheres. Our findings provide a potential mechanism by which vagus nerve stimulation may be efficacious in migraine and suggest that susceptibility to spreading depression is a suitable platform to optimize its efficacy.
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Martínez-Vargas D, Valdés-Cruz A, Magdaleno-Madrigal V, Fernández-Mas R, Almazán-Alvarado S. Effect of Electrical Stimulation of the Nucleus of the Solitary Tract on Electroencephalographic Spectral Power and the Sleep–Wake Cycle in Freely Moving Cats. Brain Stimul 2017; 10:116-125. [DOI: 10.1016/j.brs.2016.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 07/15/2016] [Accepted: 08/24/2016] [Indexed: 10/21/2022] Open
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20
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Arle JE, Carlson KW, Mei L. Investigation of mechanisms of vagus nerve stimulation for seizure using finite element modeling. Epilepsy Res 2016; 126:109-18. [DOI: 10.1016/j.eplepsyres.2016.07.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 07/05/2016] [Accepted: 07/25/2016] [Indexed: 10/21/2022]
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21
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Herrera-Vázquez O, Rojas AT, Fleury A. NEUROINFLAMACIÓN Y EPILEPSIA. TIP REVISTA ESPECIALIZADA EN CIENCIAS QUÍMICO-BIOLÓGICAS 2016. [DOI: 10.1016/j.recqb.2016.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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22
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Yuan H, Silberstein SD. Vagus Nerve and Vagus Nerve Stimulation, a Comprehensive Review: Part II. Headache 2015; 56:259-66. [DOI: 10.1111/head.12650] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Hsiangkuo Yuan
- Jefferson Headache Center, Thomas Jefferson University; Philadelphia PA USA
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23
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Yuan H, Silberstein SD. Vagus Nerve and Vagus Nerve Stimulation, a Comprehensive Review: Part III. Headache 2015; 56:479-90. [PMID: 26364805 DOI: 10.1111/head.12649] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2015] [Indexed: 12/23/2022]
Abstract
Vagus nerve stimulation (VNS) is currently undergoing multiple trials to explore its potential for various clinical disorders. To date, VNS has been approved for the treatment of refractory epilepsy and depression. It exerts antiepileptic or antiepileptogenic effect possibly through neuromodulation of certain monoamine pathways. Beyond epilepsy, VNS is also under investigation for the treatment of inflammation, asthma, and pain. VNS influences the production of inflammatory cytokines to dampen the inflammatory response. It triggers the systemic release of catecholamines that alleviates the asthma attack. VNS induces antinociception by modulating multiple pain-associated structures in the brain and spinal cord affecting peripheral/central nociception, opioid response, inflammation process, autonomic activity, and pain-related behavior. Progression in VNS clinical efficacy over time suggests an underlying disease-modifying neuromodulation, which is an emerging field in neurology. With multiple potential clinical applications, further development of VNS is encouraging.
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Affiliation(s)
- Hsiangkuo Yuan
- Jefferson Headache Center, Thomas Jefferson University, Philadelphia, PA, USA
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24
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Childs JE, Alvarez-Dieppa AC, McIntyre CK, Kroener S. Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning. J Vis Exp 2015:e53032. [PMID: 26325100 DOI: 10.3791/53032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Extinction describes the process of attenuating behavioral responses to neutral stimuli when they no longer provide the reinforcement that has been maintaining the behavior. There is close correspondence between fear and human anxiety, and therefore studies of extinction learning might provide insight into the biological nature of anxiety-related disorders such as post-traumatic stress disorder, and they might help to develop strategies to treat them. Preclinical research aims to aid extinction learning and to induce targeted plasticity in extinction circuits to consolidate the newly formed memory. Vagus nerve stimulation (VNS) is a powerful approach that provides tight temporal and circuit-specific release of neurotransmitters, resulting in modulation of neuronal networks engaged in an ongoing task. VNS enhances memory consolidation in both rats and humans, and pairing VNS with exposure to conditioned cues enhances the consolidation of extinction learning in rats. Here, we provide a detailed protocol for the preparation of custom-made parts and the surgical procedures required for VNS in rats. Using this protocol we show how VNS can facilitate the extinction of conditioned fear responses in an auditory fear conditioning task. In addition, we provide evidence that VNS modulates synaptic plasticity in the pathway between the infralimbic (IL) medial prefrontal cortex and the basolateral complex of the amygdala (BLA), which is involved in the expression and modulation of extinction memory.
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Affiliation(s)
- Jessica E Childs
- School of Behavioral and Brain Sciences, The University of Texas at Dallas
| | | | - Christa K McIntyre
- School of Behavioral and Brain Sciences, The University of Texas at Dallas
| | - Sven Kroener
- School of Behavioral and Brain Sciences, The University of Texas at Dallas;
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25
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Zeiler F, Zeiler K, Teitelbaum J, Gillman L, West M. VNS for refractory status epilepticus. Epilepsy Res 2015; 112:100-13. [DOI: 10.1016/j.eplepsyres.2015.02.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 02/07/2015] [Accepted: 02/27/2015] [Indexed: 11/30/2022]
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Vagus Nerve Stimulation has Antidepressant Effects in the Kainic Acid Model for Temporal Lobe Epilepsy. Brain Stimul 2015; 8:13-20. [DOI: 10.1016/j.brs.2014.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/04/2014] [Accepted: 09/22/2014] [Indexed: 11/22/2022] Open
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Abstract
ABSTRACT The use of devices in the treatment of epilepsy is an emerging therapy for those patients whose seizures are not controlled by medications. This article will discuss current treatment options with devices for vagus nerve stimulation, deep brain stimulation and responsive neurostimulation. Emerging therapies in noninvasive neurostimulation such as with trigeminal nerve stimulation, transcranial magnetic stimulation and transcranial direct current stimulation may prove to be promising solutions. Finally, new and enhanced techniques of drug delivery are discussed as well as other devices with potential use in the study and treatment of epilepsy.
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Affiliation(s)
- Amanda F Van Straten
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Geisel School of Medicine at Dartmouth, One Medical Center Drive, Lebanon, NH 03756, USA
| | - Barbara C Jobst
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Geisel School of Medicine at Dartmouth, One Medical Center Drive, Lebanon, NH 03756, USA
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Dridi D, Bchir F, Zouiten A, Tahrani L, Ben Mansour H. Murine chronotoxicity to pharmaceutical wastewater. BIOL RHYTHM RES 2014. [DOI: 10.1080/09291016.2013.787684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Juan EJ, González R, Albors G, Ward MP, Irazoqui P. Vagus Nerve Modulation Using Focused Pulsed Ultrasound: Potential Applications and Preliminary Observations in a Rat. INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY 2014; 24:67-71. [PMID: 25165410 PMCID: PMC4142523 DOI: 10.1002/ima.22080] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The use of focused ultrasonic waves to modulate neural structures has gained recent interest due to its potential in treating neurological disorders non-invasively. While several papers have focused on the use of ultrasound neuromodulation on peripheral nerves, none of these studies have been performed on the vagus nerve. We present preliminary observations on the effects of focused pulsed ultrasound (FPUS) on the conduction of the left cervical vagus nerve of a Long Evans rat. Ultrasound energy was applied at a frequency of 1.1 MHz, and at spatial-peak, temporal average intensities that ranged from 13.6 to 93.4 W/cm2. Vagus nerve inhibition was observed in most cases. Results of this preliminary study suggested that there is a proportional relationship between acoustic intensity and the level of nerve inhibition.
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Affiliation(s)
- Eduardo J Juan
- Electrical Engineering, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Rafael González
- Electrical Engineering, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Gabriel Albors
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
| | - Matthew P Ward
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
| | - Pedro Irazoqui
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
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Electrical modulation of neuronal networks in brain-injured patients with disorders of consciousness: A systematic review. ACTA ACUST UNITED AC 2014; 33:88-97. [DOI: 10.1016/j.annfar.2013.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Effect of vagus nerve stimulation on electrical kindling in different stages of seizure severity in freely moving cats. Epilepsy Res 2014; 108:81-9. [DOI: 10.1016/j.eplepsyres.2013.10.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 09/19/2013] [Accepted: 10/18/2013] [Indexed: 11/21/2022]
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Mollet L, Raedt R, Delbeke J, El Tahry R, Grimonprez A, Dauwe I, DE Herdt V, Meurs A, Wadman W, Boon P, Vonck K. Electrophysiological responses from vagus nerve stimulation in rats. Int J Neural Syst 2013; 23:1350027. [PMID: 24156670 DOI: 10.1142/s0129065713500275] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The mechanism of action of vagus nerve stimulation (VNS) for pharmacoresistant epilepsy is unknown and the therapeutic outcome is highly variable. We investigated stimulation-induced vagus nerve electrophysiological responses in rats using various stimulation parameters. Conduction velocity, I(50), rheobase and chronaxie were calculated. We identified an early and late component corresponding to an afferent compound action potential (CAP) and a remote laryngeal motor-evoked potential (LMEP), respectively. The conduction velocity (CAP: 26.2 ± 1.4 m/s; LMEP: 32.4 ± 2.4 m/s) and I(50) (CAP: 2.4 ± 0.3 mA; LMEP: 1.8±0.2 mA) were significantly different for both components, the rheobase (CAP: 140±30 μA; LMEP: 110±26 μA) and chronaxie (CAP: 66±7 μs; LMEP: 73±9 μs) were not. Using a pulse of 10 μs, the CAP saturated between 4-5 mA. Our method can be used to record VNS-induced electrophysiological responses in rats and provides an objective biomarker for electrical stimulation with various parameters in an experimental set-up. Our findings are potentially useful for clinical purposes in the sense that combination of VNS and recording of vagal nerve CAPs may help clinicians to determine the individual optimal intensity required to fully activate fast-conducting afferent fibers.
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Affiliation(s)
- Lies Mollet
- Laboratory for Clinical and Experimental Neurophysiology, Neurobiology and Neuropsychology, Department of Neurology, Institute for Neuroscience, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium
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Rocha L. Interaction between electrical modulation of the brain and pharmacotherapy to control pharmacoresistant epilepsy. Pharmacol Ther 2013; 138:211-28. [DOI: 10.1016/j.pharmthera.2013.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 01/07/2013] [Indexed: 12/15/2022]
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Vagus nerve stimulation inhibits seizure activity and protects blood–brain barrier integrity in kindled rats with cortical dysplasia. Life Sci 2013; 92:289-97. [DOI: 10.1016/j.lfs.2013.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 12/17/2012] [Accepted: 01/02/2013] [Indexed: 11/21/2022]
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Rat vagus nerve stimulation model of seizure suppression: nNOS and ΔFos B changes in the brainstem. J Chem Neuroanat 2012; 46:1-9. [PMID: 23022956 DOI: 10.1016/j.jchemneu.2012.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 09/18/2012] [Accepted: 09/19/2012] [Indexed: 11/20/2022]
Abstract
Vagus nerve stimulation (VNS) is a moderately effective treatment for intractable epilepsy. However, the mechanism of action is poorly understood. The effect of left VNS in amygdala kindled rats was investigated by studying changes in nNOS and ΔFos B expression in primary and secondary vagus nerve projection nuclei: the nucleus of the solitary tract (NTS), dorsal motor nucleus of the vagus nerve (DMV), parabrachial nucleus (PBN) and locus coeruleus (LC). Rats were fully kindled by stimulation of the amygdala. Subsequently, when the fully kindled state was reached and then maintained for ten days, rats received a single 3-min train of VNS starting 1min prior to the kindling stimulus and lasting for 2min afterwards. In control animals the vagus nerve was not stimulated. Animals were sacrificed 48h later. The brainstems were stained for neuronal nitric oxide synthase (nNOS) and ΔFos B. VNS decreased seizure duration with more than 25% in 21% of rats. No VNS associated changes in nNOS immunoreactivity were observed in the NTS and no changes in ΔFos B were observed in the NTS, PBN, or LC. High nNOS immunopositive cell densities of >300cells/mm(2) were significantly more frequent in the left DMV than in the right (χ(2)(1)=26.2, p<0.01), independent of whether the vagus nerve was stimulated. We conclude that the observed nNOS immunoreactivity in the DMV suggests surgery-induced axonal damage. A 3-min train of VNS in fully kindled rats does not affect ΔFos B expression in primary and secondary projection nuclei of the vagus nerve.
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Alexander GM, McNamara JO. Vagus nerve stimulation elevates seizure threshold in the kindling model. Epilepsia 2012; 53:2043-52. [DOI: 10.1111/j.1528-1167.2012.03646.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wu C, Sharan AD. Neurostimulation for the Treatment of Epilepsy: A Review of Current Surgical Interventions. Neuromodulation 2012; 16:10-24; discussion 24. [DOI: 10.1111/j.1525-1403.2012.00501.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Mansour HB, Dellai A, Ayed Y. Toxicities effects of pharmaceutical, olive mill and textile wastewaters before and after degradation by Pseudomonas putida mt-2. Cancer Cell Int 2012; 12:4. [PMID: 22314194 PMCID: PMC3295689 DOI: 10.1186/1475-2867-12-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 02/07/2012] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Removal of numerous classes of chemical pollutants from the industrial wastewater such as textile, pharmaceutical and olive mill using conventional wastewater treatment, is incomplete and several studies suggested that improvement of this situation would require the application of biological treatment techniques. Dyes, polyphenols and drugs are an environmental pollutants extremely toxics to plants and other living organisms including humans. These effluents were previously treated by Pseudomonas putida. The main of this work was to evaluate the in vivo toxicity of the three wastewaters. METHODS Writhes and convulsant effect of effluents were carried out and were compared to the treated effluents. Only pharmaceutical wastewater was exhibited a convulsant effect which observed in mice treated by effluent. On the other hand, all industrial wastewater induced significantly an algogenic effects particularly when mice were treated by the pharmaceutical wastewater (Number of writhes = 44). CONCLUSION Toxicity was totally removed when mice were treated by the bio remediated effluent. This indicates that P. putida was able to completely detoxify the toxic industrial effluent.
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Affiliation(s)
- Hedi Ben Mansour
- Laboratoire de biotechnologie et Valorisation de Bio Géo Ressources (LBVBGR) Institut Supérieur de Biotechnologie - ISBST BioTechPole Sidi Thabet Université Manouba, Ariana 2020, Tunisie
| | - Afef Dellai
- Laboratoire de biotechnologie et Valorisation de Bio Géo Ressources (LBVBGR) Institut Supérieur de Biotechnologie - ISBST BioTechPole Sidi Thabet Université Manouba, Ariana 2020, Tunisie
| | - Yosra Ayed
- Laboratoire de Recherche des Substances Biologiquement Compatibles, Faculté de Médecine Dentaire, Rue Avicenne, Monastir 5000, Tunisie
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