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Weisend JE, Carlson AP, William Shuttleworth C. Spreading Depolarization Induces a Transient Potentiation of Excitatory Synaptic Transmission. Neuroscience 2024:S0306-4522(24)00237-9. [PMID: 38821241 DOI: 10.1016/j.neuroscience.2024.05.035] [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: 03/14/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 06/02/2024]
Abstract
Spreading depolarization (SD) is a slowly propagating wave of prolonged activation followed by a period of synaptic suppression. Some prior reports have shown potentiation of synaptic transmission after recovery from synaptic suppression and noted similarities with the phenomenon of long-term potentiation (LTP). Since SD is increasingly recognized as participating in diverse neurological disorders, it is of interest to determine whether SD indeed leads to a generalized and sustained long-term strengthening of synaptic connections. We performed a characterization of SD-induced potentiation, and tested whether distinctive features of SD, including adenosine accumulation and swelling, contribute to reports of SD-induced plasticity. Field excitatory postsynaptic potentials (fEPSPs) were recorded in the hippocampal CA1 subregion of murine brain slices, and SD elicited using focal microinjection of KCl. A single SD was sufficient to induce a consistent potentiation of slope and amplitude of fEPSPs. Both AMPA- and NMDA-receptor mediated components were enhanced. Potentiation peaked ∼20 minutes after SD recovery and was sustained for ∼30 minutes. However, fEPSP amplitude and slope decayed over an extended 2-hour recording period and was estimated to reach baseline after ∼3 hours. Potentiation was saturated after a single SD and adenosine A1 receptor activation did not mask additional potentiation. Induction of LTP with theta-burst stimulation was not altered by prior induction of SD and molecular mediators known to block LTP induction did not block SD-induced potentiation. Together, these results indicate an intermediate duration potentiation that is distinct from hippocampal LTP and may have implications for circuit function for 1-2 hours following SD.
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Affiliation(s)
- Jordan E Weisend
- Department of Neurosciences University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Andrew P Carlson
- Department of Neurosurgery University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - C William Shuttleworth
- Department of Neurosciences University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA.
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2
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Chen F, Dong X, Wang Z, Wu T, Wei L, Li Y, Zhang K, Ma Z, Tian C, Li J, Zhao J, Zhang W, Liu A, Shen H. Regulation of specific abnormal calcium signals in the hippocampal CA1 and primary cortex M1 alleviates the progression of temporal lobe epilepsy. Neural Regen Res 2024; 19:425-433. [PMID: 37488907 PMCID: PMC10503629 DOI: 10.4103/1673-5374.379048] [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: 02/06/2023] [Revised: 03/15/2023] [Accepted: 05/04/2023] [Indexed: 07/26/2023] Open
Abstract
Temporal lobe epilepsy is a multifactorial neurological dysfunction syndrome that is refractory, resistant to antiepileptic drugs, and has a high recurrence rate. The pathogenesis of temporal lobe epilepsy is complex and is not fully understood. Intracellular calcium dynamics have been implicated in temporal lobe epilepsy. However, the effect of fluctuating calcium activity in CA1 pyramidal neurons on temporal lobe epilepsy is unknown, and no longitudinal studies have investigated calcium activity in pyramidal neurons in the hippocampal CA1 and primary motor cortex M1 of freely moving mice. In this study, we used a multi-channel fiber photometry system to continuously record calcium signals in CA1 and M1 during the temporal lobe epilepsy process. We found that calcium signals varied according to the grade of temporal lobe epilepsy episodes. In particular, cortical spreading depression, which has recently been frequently used to represent the continuously and substantially increased calcium signals, was found to correspond to complex and severe behavioral characteristics of temporal lobe epilepsy ranging from grade II to grade V. However, vigorous calcium oscillations and highly synchronized calcium signals in CA1 and M1 were strongly related to convulsive motor seizures. Chemogenetic inhibition of pyramidal neurons in CA1 significantly attenuated the amplitudes of the calcium signals corresponding to grade I episodes. In addition, the latency of cortical spreading depression was prolonged, and the above-mentioned abnormal calcium signals in CA1 and M1 were also significantly reduced. Intriguingly, it was possible to rescue the altered intracellular calcium dynamics. Via simultaneous analysis of calcium signals and epileptic behaviors, we found that the progression of temporal lobe epilepsy was alleviated when specific calcium signals were reduced, and that the end-point behaviors of temporal lobe epilepsy were improved. Our results indicate that the calcium dynamic between CA1 and M1 may reflect specific epileptic behaviors corresponding to different grades. Furthermore, the selective regulation of abnormal calcium signals in CA1 pyramidal neurons appears to effectively alleviate temporal lobe epilepsy, thereby providing a potential molecular mechanism for a new temporal lobe epilepsy diagnosis and treatment strategy.
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Affiliation(s)
- Feng Chen
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
- Institute for Translational Neuroscience, the Second Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Xi Dong
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
- Institute for Translational Brain Research, Fudan University, Shanghai, China
| | - Zhenhuan Wang
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Tongrui Wu
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Liangpeng Wei
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
- Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Yuanyuan Li
- Innovative Institute of Chinese Medicine and Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Kai Zhang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zengguang Ma
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Chao Tian
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Jing Li
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Jingyu Zhao
- Laboratory of Neurobiology, School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Wei Zhang
- Tianjin Eye Hospital, Tianjin Eye Institute, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
| | - Aili Liu
- Laboratory of Neurobiology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Hui Shen
- Innovative Institute of Chinese Medicine and Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
- Laboratory of Neurobiology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
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3
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Ringuette D, EbrahimAmini A, Sangphosuk W, Aquilino MS, Carroll G, Ashley M, Bazzigaluppi P, Dufour S, Droguerre M, Stefanovic B, Levi O, Charveriat M, Monnier PP, Carlen PL. Spreading depolarization suppression from inter-astrocytic gap junction blockade assessed with multimodal imaging and a novel wavefront detection scheme. Neurotherapeutics 2024; 21:e00298. [PMID: 38241157 PMCID: PMC10903093 DOI: 10.1016/j.neurot.2023.10.008] [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: 10/03/2023] [Accepted: 10/07/2023] [Indexed: 01/21/2024] Open
Abstract
Spreading depolarizations (SDs) are an enigmatic and ubiquitous co-morbidity of neural dysfunction. SDs are propagating waves of local field depolarization and increased extracellular potassium. They increase the metabolic demand on brain tissue, resulting in changes in tissue blood flow, and are associated with adverse neurological consequences including stroke, epilepsy, neurotrauma, and migraine. Their occurrence is associated with poor patient prognosis through mechanisms which are only partially understood. Here we show in vivo that two (structurally dissimilar) drugs, which suppress astroglial gap junctional communication, can acutely suppress SDs. We found that mefloquine hydrochloride (MQH), administered IP, slowed the propagation of the SD potassium waveform and intermittently led to its suppression. The hemodynamic response was similarly delayed and intermittently suppressed. Furthermore, in instances where SD led to transient tissue swelling, MQH reduced observable tissue displacement. Administration of meclofenamic acid (MFA) IP was found to reduce blood flow, both proximal and distal, to the site of SD induction, preceding a large reduction in the amplitude of the SD-associated potassium wave. We introduce a novel image processing scheme for SD wavefront localization under low-contrast imaging conditions permitting full-field wavefront velocity mapping and wavefront parametrization. We found that MQH administration delayed SD wavefront's optical correlates. These two clinically used drugs, both gap junctional blockers found to distinctly suppress SDs, may be of therapeutic benefit in the various brain disorders associated with recurrent SDs.
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Affiliation(s)
- Dene Ringuette
- Department of Physiology, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada; Division of Genetics and Development, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada; Krembil Neuroscience, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada.
| | - Azin EbrahimAmini
- Krembil Neuroscience, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada; The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada
| | - Weerawong Sangphosuk
- Krembil Neuroscience, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada
| | - Mark S Aquilino
- The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada
| | - Gwennyth Carroll
- The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada
| | - Max Ashley
- Krembil Neuroscience, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada
| | - Paolo Bazzigaluppi
- Sunnybrook Health Sciences Center, 2075 Bayview Ave., Toronto, Ontario M4N 3M5, Canada
| | - Suzie Dufour
- The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada
| | | | - Bojana Stefanovic
- Department of Medical Biophysics, University of Toronto, 610 University Ave., Toronto, Ontario M5G 2M9, Canada; Sunnybrook Health Sciences Center, 2075 Bayview Ave., Toronto, Ontario M4N 3M5, Canada
| | - Ofer Levi
- The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada; The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Rd., Toronto, Ontario M5S 3G4, Canada
| | | | - Philippe P Monnier
- Department of Physiology, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada; Division of Genetics and Development, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada; Department of Ophthalmology & Vision Science, Faculty of Medicine, University of Toronto, 340 College St., Toronto, Ontario M5T 3A9, Canada
| | - Peter L Carlen
- Department of Physiology, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada; Division of Genetics and Development, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada; Krembil Neuroscience, Krembil Research Institute, 60 Leonard Ave., Toronto, Ontario M5T 2S8, Canada; The Institute Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada
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Sanicola HW, Stewart CE, Luther P, Yabut K, Guthikonda B, Jordan JD, Alexander JS. Pathophysiology, Management, and Therapeutics in Subarachnoid Hemorrhage and Delayed Cerebral Ischemia: An Overview. PATHOPHYSIOLOGY 2023; 30:420-442. [PMID: 37755398 PMCID: PMC10536590 DOI: 10.3390/pathophysiology30030032] [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: 07/20/2023] [Revised: 08/21/2023] [Accepted: 09/07/2023] [Indexed: 09/28/2023] Open
Abstract
Subarachnoid hemorrhage (SAH) is a type of hemorrhagic stroke resulting from the rupture of an arterial vessel within the brain. Unlike other stroke types, SAH affects both young adults (mid-40s) and the geriatric population. Patients with SAH often experience significant neurological deficits, leading to a substantial societal burden in terms of lost potential years of life. This review provides a comprehensive overview of SAH, examining its development across different stages (early, intermediate, and late) and highlighting the pathophysiological and pathohistological processes specific to each phase. The clinical management of SAH is also explored, focusing on tailored treatments and interventions to address the unique pathological changes that occur during each stage. Additionally, the paper reviews current treatment modalities and pharmacological interventions based on the evolving guidelines provided by the American Heart Association (AHA). Recent advances in our understanding of SAH will facilitate clinicians' improved management of SAH to reduce the incidence of delayed cerebral ischemia in patients.
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Affiliation(s)
- Henry W. Sanicola
- Department of Neurology, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA;
| | - Caleb E. Stewart
- Department of Neurosurgery, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA;
| | - Patrick Luther
- School of Medicine, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA; (P.L.); (K.Y.)
| | - Kevin Yabut
- School of Medicine, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA; (P.L.); (K.Y.)
| | - Bharat Guthikonda
- Department of Neurosurgery, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA;
| | - J. Dedrick Jordan
- Department of Neurology, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA;
| | - J. Steven Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center in Shreveport, Shreveport, LA 71103, USA
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Deep Brain Stimulation of the Medial Septal Area Can Modulate Gene Expression in the Hippocampus of Rats under Urethane Anesthesia. Int J Mol Sci 2022; 23:ijms23116034. [PMID: 35682713 PMCID: PMC9181580 DOI: 10.3390/ijms23116034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/21/2022] [Accepted: 05/23/2022] [Indexed: 11/17/2022] Open
Abstract
We studied the effects of stimulation of the medial septal area on the gene expression in the dorsal and ventral hippocampus. Rats under urethane anesthesia were implanted with a recording electrode in the right hippocampus and stimulating electrode in the dorsal medial septum (dMS) or medial septal nucleus (MSN). After one-hour-long deep brain stimulation, we collected ipsi- and contralateral dorsal and ventral hippocampi. Quantitative PCR showed that deep brain stimulation did not cause any changes in the intact contralateral dorsal and ventral hippocampi. A comparison of ipsi- and contralateral hippocampi in the control unstimulated animals showed that electrode implantation in the ipsilateral dorsal hippocampus led to a dramatic increase in the expression of immediate early genes (c-fos, arc, egr1, npas4), neurotrophins (ngf, bdnf) and inflammatory cytokines (il1b and tnf, but not il6) not only in the area close to implantation site but also in the ventral hippocampus. Moreover, the stimulation of MSN but not dMS further increased the expression of c-fos, egr1, npas4, bdnf, and tnf in the ipsilateral ventral but not dorsal hippocampus. Our data suggest that the activation of medial septal nucleus can change the gene expression in ventral hippocampal cells after their priming by other stimuli.
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Neuroelectric Mechanisms of Delayed Cerebral Ischemia after Aneurysmal Subarachnoid Hemorrhage. Int J Mol Sci 2022; 23:ijms23063102. [PMID: 35328523 PMCID: PMC8951073 DOI: 10.3390/ijms23063102] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/11/2022] [Accepted: 03/11/2022] [Indexed: 12/16/2022] Open
Abstract
Delayed cerebral ischemia (DCI) remains a challenging but very important condition, because DCI is preventable and treatable for improving functional outcomes after aneurysmal subarachnoid hemorrhage (SAH). The pathologies underlying DCI are multifactorial. Classical approaches to DCI focus exclusively on preventing and treating the reduction of blood flow supply. However, recently, glutamate-mediated neuroelectric disruptions, such as excitotoxicity, cortical spreading depolarization and seizures, and epileptiform discharges, have been reported to occur in high frequencies in association with DCI development after SAH. Each of the neuroelectric disruptions can trigger the other, which augments metabolic demand. If increased metabolic demand exceeds the impaired blood supply, the mismatch leads to relative ischemia, resulting in DCI. The neuroelectric disruption also induces inverted vasoconstrictive neurovascular coupling in compromised brain tissues after SAH, causing DCI. Although glutamates and the receptors may play central roles in the development of excitotoxicity, cortical spreading ischemia and epileptic activity-related events, more studies are needed to clarify the pathophysiology and to develop novel therapeutic strategies for preventing or treating neuroelectric disruption-related DCI after SAH. This article reviews the recent advancement in research on neuroelectric disruption after SAH.
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7
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Tuka B, Nyári A, Cseh EK, Körtési T, Veréb D, Tömösi F, Kecskeméti G, Janáky T, Tajti J, Vécsei L. Clinical relevance of depressed kynurenine pathway in episodic migraine patients: potential prognostic markers in the peripheral plasma during the interictal period. J Headache Pain 2021; 22:60. [PMID: 34171996 PMCID: PMC8229298 DOI: 10.1186/s10194-021-01239-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background Altered glutamatergic neurotransmission and neuropeptide levels play a central role in migraine pathomechanism. Previously, we confirmed that kynurenic acid, an endogenous glutamatergic antagonist, was able to decrease the expression of pituitary adenylate cyclase-activating polypeptide 1–38, a neuropeptide with known migraine-inducing properties. Hence, our aim was to reveal the role of the peripheral kynurenine pathway (KP) in episodic migraineurs. We focused on the complete tryptophan (Trp) catabolism, which comprises the serotonin and melatonin routes in addition to kynurenine metabolites. We investigated the relationship between metabolic alterations and clinical characteristics of migraine patients. Methods Female migraine patients aged between 25 and 50 years (n = 50) and healthy control subjects (n = 34) participated in this study. Blood samples were collected from the cubital veins of subjects (during both the interictal/ictal periods in migraineurs, n = 47/12, respectively). 12 metabolites of Trp pathway were determined by neurochemical measurements (UHPLC-MS/MS). Results Plasma concentrations of the most Trp metabolites were remarkably decreased in the interictal period of migraineurs compared to healthy control subjects, especially in the migraine without aura (MWoA) subgroup: Trp (p < 0.025), L-kynurenine (p < 0.001), kynurenic acid (p < 0.016), anthranilic acid (p < 0.007), picolinic acid (p < 0.03), 5-hydroxy-indoleaceticacid (p < 0.025) and melatonin (p < 0.023). Several metabolites showed a tendency to elevate during the ictal phase, but this was significant only in the cases of anthranilic acid, 5-hydroxy-indoleaceticacid and melatonin in MWoA patients. In the same subgroup, higher interictal kynurenic acid levels were identified in patients whose headache was severe and not related to their menstruation cycle. Negative linear correlation was detected between the interictal levels of xanthurenic acid/melatonin and attack frequency. Positive associations were found between the ictal 3-hydroxykynurenine levels and the beginning of attacks, just as between ictal picolinic acid levels and last attack before ictal sampling. Conclusions Our results suggest that there is a widespread metabolic imbalance in migraineurs, which manifests in a completely depressed peripheral Trp catabolism during the interictal period. It might act as trigger for the migraine attack, contributing to glutamate excess induced neurotoxicity and generalised hyperexcitability. This data can draw attention to the clinical relevance of KP in migraine. Supplementary Information The online version contains supplementary material available at 10.1186/s10194-021-01239-1.
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Affiliation(s)
- Bernadett Tuka
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary.,MTA-SZTE Neuroscience Research Group, Department of Neurology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Aliz Nyári
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary
| | - Edina Katalin Cseh
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary
| | - Tamás Körtési
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary.,MTA-SZTE Neuroscience Research Group, Department of Neurology, Faculty of Medicine, University of Szeged, Szeged, Hungary.,Faculty of Health Sciences and Social Studies, University of Szeged, Szeged, Hungary
| | - Dániel Veréb
- Department of Radiology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Ferenc Tömösi
- Department of Medical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - Gábor Kecskeméti
- Department of Medical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - Tamás Janáky
- Department of Medical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - János Tajti
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary
| | - László Vécsei
- Department of Neurology, Faculty of Medicine, University of Szeged, Semmelweis u 6, Szeged, H6725, Hungary. .,MTA-SZTE Neuroscience Research Group, Department of Neurology, Faculty of Medicine, University of Szeged, Szeged, Hungary. .,Department of Neurology, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary.
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Remote and Persistent Alterations in Glutamate Receptor Subunit Composition Induced by Spreading Depolarizations in Rat Brain. Cell Mol Neurobiol 2020; 42:1253-1260. [PMID: 33184769 PMCID: PMC8113318 DOI: 10.1007/s10571-020-01000-3] [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: 05/13/2020] [Accepted: 11/06/2020] [Indexed: 02/01/2023]
Abstract
Spreading depolarizations (SDs) are massive breakdowns of ion homeostasis in the brain's gray matter and are a necessary pathologic mechanism for lesion development in various injury models. However, injury-induced SDs also propagate into remote, healthy tissue where they do not cause cell death, yet their functional long-term effects are unknown. Here we induced SDs in uninjured cortex and hippocampus of Sprague-Dawley rats to study their impact on glutamate receptor subunit expression after three days. We find that both cortical and hippocampal tissue exhibit changes in glutamate receptor subunit expression, including GluA1 and GluN2B, suggesting that SDs in healthy brain tissue may have a role in plasticity. This study is the first to show prolonged effects of SDs on glutamate signaling and has implications for neuroprotection strategies aimed at SD suppression.
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Govoni V, Cesnik E, Ferri C, Fallica E. The distribution of the transient global amnesia in the province of Ferrara, Italy, a clue to the pathogenesis? Neurol Sci 2020; 42:1821-1826. [DOI: 10.1007/s10072-020-04696-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 08/28/2020] [Indexed: 11/29/2022]
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10
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Kincses ZT, Veréb D, Faragó P, Tóth E, Kocsis K, Kincses B, Király A, Bozsik B, Párdutz Á, Szok D, Tajti J, Vécsei L, Tuka B, Szabó N. Are Migraine With and Without Aura Really Different Entities? Front Neurol 2019; 10:982. [PMID: 31632329 PMCID: PMC6783501 DOI: 10.3389/fneur.2019.00982] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 08/28/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Migraine research is booming with the rapidly developing neuroimaging tools. Structural and functional alterations of the migrainous brain were detected with MRI. The outcome of a research study largely depends on the working hypothesis, on the chosen measurement approach and also on the subject selection. Against all evidence from the literature that migraine subtypes are different, most of the studies handle migraine with and without aura as one disease. Methods: Publications from PubMed database were searched for terms of "migraine with aura," "migraine without aura," "interictal," "MRI," "diffusion weighted MRI," "functional MRI," "compared to," "atrophy" alone and in combination. Conclusion: Only a few imaging studies compared the two subforms of the disease, migraine with aura, and without aura, directly. Functional imaging investigations largely agree that there is an increased activity/activation of the brain in migraine with aura as compared to migraine without aura. We propose that this might be the signature of cortical hyperexcitability. However, structural investigations are not equivocal. We propose that variable contribution of parallel, competing mechanisms of maladaptive plasticity and neurodegeneration might be the reason behind the variable results.
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Affiliation(s)
- Zsigmond Tamás Kincses
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
- Department of Radiology, University of Szeged, Szeged, Hungary
| | - Dániel Veréb
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Péter Faragó
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Eszter Tóth
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Krisztián Kocsis
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Bálint Kincses
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - András Király
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
- Brain and Mind Research, Central European Institute of Technology, Brno, Czechia
| | - Bence Bozsik
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Árpád Párdutz
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - Délia Szok
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - János Tajti
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
| | - László Vécsei
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
- MTA-SZTE, Neuroscience Research Group, Szeged, Hungary
| | - Bernadett Tuka
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
- MTA-SZTE, Neuroscience Research Group, Szeged, Hungary
| | - Nikoletta Szabó
- Department of Neurology, Faculty of Medicine, Interdisciplinary Excellent Centre, University of Szeged, Szeged, Hungary
- Brain and Mind Research, Central European Institute of Technology, Brno, Czechia
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11
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de Iure A, Napolitano F, Beck G, Quiroga Varela A, Durante V, Sciaccaluga M, Mazzocchetti P, Megaro A, Tantucci M, Cardinale A, Punzo D, Mancini A, Costa C, Ghiglieri V, Tozzi A, Picconi B, Papa SM, Usiello A, Calabresi P. Striatal spreading depolarization: Possible implication in levodopa-induced dyskinetic-like behavior. Mov Disord 2019; 34:832-844. [PMID: 30759320 DOI: 10.1002/mds.27632] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/07/2019] [Accepted: 01/14/2019] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Spreading depolarization (SD) is a transient self-propagating wave of neuronal and glial depolarization coupled with large membrane ionic changes and a subsequent depression of neuronal activity. Spreading depolarization in the cortex is implicated in migraine, stroke, and epilepsy. Conversely, spreading depolarization in the striatum, a brain structure deeply involved in motor control and in Parkinson's disease (PD) pathophysiology, has been poorly investigated. METHODS We characterized the participation of glutamatergic and dopaminergic transmission in the induction of striatal spreading depolarization by using a novel approach combining optical imaging, measurements of endogenous DA levels, and pharmacological and molecular analyses. RESULTS We found that striatal spreading depolarization requires the concomitant activation of D1-like DA and N-methyl-d-aspartate receptors, and it is reduced in experimental PD. Chronic l-dopa treatment, inducing dyskinesia in the parkinsonian condition, increases the occurrence and speed of propagation of striatal spreading depolarization, which has a direct impact on one of the signaling pathways downstream from the activation of D1 receptors. CONCLUSION Striatal spreading depolarization might contribute to abnormal basal ganglia activity in the dyskinetic condition and represents a possible therapeutic target. © 2019 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Antonio de Iure
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy.,Laboratory of Experimental Neurophysiology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Pisana, Rome, Italy
| | - Francesco Napolitano
- Ceinge Biotecnologie Avanzate, Naples, Italy.,Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II,", Naples, Italy
| | - Goichi Beck
- Yerkes National Primate Research Center, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Ana Quiroga Varela
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Valentina Durante
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Miriam Sciaccaluga
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Petra Mazzocchetti
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Alfredo Megaro
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Michela Tantucci
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Antonella Cardinale
- Department of Experimental Medicine, Section of Physiology and Biochemistry, University of Perugia, Perugia, Italy
| | - Daniela Punzo
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Caserta, Italy.,Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Foundation SDN, Via Gianturco, Naples, Italy
| | - Andrea Mancini
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Cinzia Costa
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Veronica Ghiglieri
- Laboratory of Neurophysiology, Santa Lucia Foundation, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy.,Department of Philosophy, Human, Social and Educational Sciences, University of Perugia, Perugia, Italy
| | - Alessandro Tozzi
- Department of Experimental Medicine, Section of Physiology and Biochemistry, University of Perugia, Perugia, Italy.,Laboratory of Neurophysiology, Santa Lucia Foundation, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Barbara Picconi
- Laboratory of Experimental Neurophysiology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Pisana, Rome, Italy
| | - Stella M Papa
- Yerkes National Primate Research Center, Emory University School of Medicine, Atlanta, Georgia, USA.,Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Alessandro Usiello
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Caserta, Italy.,Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Foundation SDN, Via Gianturco, Naples, Italy
| | - Paolo Calabresi
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy.,Laboratory of Neurophysiology, Santa Lucia Foundation, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
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Mann T, Zilles K, Klawitter F, Cremer M, Hawlitschka A, Palomero-Gallagher N, Schmitt O, Wree A. Acetylcholine Neurotransmitter Receptor Densities in the Striatum of Hemiparkinsonian Rats Following Botulinum Neurotoxin-A Injection. Front Neuroanat 2018; 12:65. [PMID: 30147647 PMCID: PMC6095974 DOI: 10.3389/fnana.2018.00065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 07/19/2018] [Indexed: 11/13/2022] Open
Abstract
Cholinergic neurotransmission has a pivotal function in the caudate-putamen, and is highly associated with the pathophysiology of Parkinson's disease. Here, we investigated long-term changes in the densities of the muscarinic receptor subtypes M1, M2, M3 (mAchRs) and the nicotinic receptor subtype α4β2 (nAchRs) in the striatum of the 6-OHDA-induced hemiparkinsonian (hemi-PD) rat model using quantitative in vitro receptor autoradiography. Hemi-PD rats exhibited an ipsilateral decrease in striatal mAchR densities between 6 and 16%. Moreover, a massive and constant decrease in striatal nAchR density by 57% was found. A second goal of the study was to disclose receptor-related mechanisms for the positive motor effect of intrastriatally injected Botulinum neurotoxin-A (BoNT-A) in hemi-PD rats in the apomorphine rotation test. Therefore, the effect of intrastriatally injected BoNT-A in control and hemi-PD rats on mAchR and nAchR densities was analyzed and compared to control animals or vehicle-injected hemi-PD rats. BoNT-A administration slightly reduced interhemispheric differences of mAchR and nAchR densities in hemi-PD rats. Importantly, the BoNT-A effect on striatal nAchRs significantly correlated with behavioral testing after apomorphine application. This study gives novel insights of 6-OHDA-induced effects on striatal mAchR and nAchR densities, and partly explains the therapeutic effect of BoNT-A in hemi-PD rats on a cellular level.
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Affiliation(s)
- Teresa Mann
- Rostock University Medical Center, Institute of Anatomy, Rostock, Germany
| | - Karl Zilles
- Research Centre Jülich, Institute of Neuroscience and Medicine INM-1, Jülich, Germany.,Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, RWTH Aachen, Aachen, Germany.,JARA-Translational Brain Medicine, Aachen, Germany
| | - Felix Klawitter
- Rostock University Medical Center, Institute of Anatomy, Rostock, Germany
| | - Markus Cremer
- Research Centre Jülich, Institute of Neuroscience and Medicine INM-1, Jülich, Germany
| | | | - Nicola Palomero-Gallagher
- Research Centre Jülich, Institute of Neuroscience and Medicine INM-1, Jülich, Germany.,Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, RWTH Aachen, Aachen, Germany
| | - Oliver Schmitt
- Rostock University Medical Center, Institute of Anatomy, Rostock, Germany
| | - Andreas Wree
- Rostock University Medical Center, Institute of Anatomy, Rostock, Germany
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13
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Khodaie B, Saba V. The Neuroprotective Effects of Long-Term Repetitive Transcranial Magnetic Stimulation on the Cortical Spreading Depression-induced Damages in Rat's Brain. Basic Clin Neurosci 2018; 9:87-100. [PMID: 29967668 PMCID: PMC6026089 DOI: 10.29252/nirp.bcn.9.2.87] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 08/28/2017] [Accepted: 10/01/2017] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Cortical Spreading Depression (CSD) is a propagating wave of neural and glial cell depolarization with important role in several clinical disorders. Repetitive Transcranial Magnetic Stimulation (rTMS) is a potential tool with preventive treatment effects in psychiatric and neuronal disorders. In this paper, we study the effects of rTMS on CSD by using behavioral and histological approaches in hippocampus and cortical regions. METHODS Twenty-four rats were divided into four groups. A group of control rats were kept in their home cage during the experiment. The CSD group received four CSD inductions during 4 weeks with 1 week intervals. The CSD-rTMS group were treated with rTMS stimulation (figure-eight coils, 20 Hz, 10 min/d) for 4 weeks. The fourth group, i.e. rTMS group received rTMS stimulation similar to the CSD-rTMS group without CSD induction. RESULTS Long-term rTMS application in treated groups significantly reduced production of dark neurons, increased the mean volume of normal neurons, and decreased the number of apoptotic neurons in cortical regions compared to the control group. The protective effects of long-term treatment by rTMS in the hippocampal regions were also studied. It was effective in some regions; however, rTMS effects on hippocampal regions were lower than cortical ones. CONCLUSION Based on the study results, rTMS has significant preventive and protective effects in CSD-induced damages in cortical and hippocampal regions of the rat's brain.
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Affiliation(s)
- Babak Khodaie
- Department of Radiology, Faculty of Paramedicine, AJA University of Medical Sciences, Tehran, Iran
- Shefa Neuroscience Research Center, Khatam-Alanbia Hospital, Tehran, Iran
| | - Valiallah Saba
- Department of Radiology, Faculty of Paramedicine, AJA University of Medical Sciences, Tehran, Iran
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Cozzolino O, Marchese M, Trovato F, Pracucci E, Ratto GM, Buzzi MG, Sicca F, Santorelli FM. Understanding Spreading Depression from Headache to Sudden Unexpected Death. Front Neurol 2018; 9:19. [PMID: 29449828 PMCID: PMC5799941 DOI: 10.3389/fneur.2018.00019] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 01/11/2018] [Indexed: 01/03/2023] Open
Abstract
Spreading depression (SD) is a neurophysiological phenomenon characterized by abrupt changes in intracellular ion gradients and sustained depolarization of neurons. It leads to loss of electrical activity, changes in the synaptic architecture, and an altered vascular response. Although SD is often described as a unique phenomenon with homogeneous characteristics, it may be strongly affected by the particular triggering event and by genetic background. Furthermore, SD may contribute differently to the pathogenesis of widely heterogeneous clinical conditions. Indeed, clinical disorders related to SD vary in their presentation and severity, ranging from benign headache conditions (migraine syndromes) to severely disabling events, such as cerebral ischemia, or even death in people with epilepsy. Although the characteristics and mechanisms of SD have been dissected using a variety of approaches, ranging from cells to human models, this phenomenon remains only partially understood because of its complexity and the difficulty of obtaining direct experimental data. Currently, clinical monitoring of SD is limited to patients who require neurosurgical interventions and the placement of subdural electrode strips. Significantly, SD events recorded in humans display electrophysiological features that are essentially the same as those observed in animal models. Further research using existing and new experimental models of SD may allow a better understanding of its core mechanisms, and of their differences in different clinical conditions, fostering opportunities to identify and develop targeted therapies for SD-related disorders and their worst consequences.
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Affiliation(s)
- Olga Cozzolino
- NEST, Istituto Nanoscienze CNR and Scuola Normale Superiore, Pisa, Italy
| | - Maria Marchese
- Molecular Medicine and Clinical Neurophysiology Laboratories, Department of Developmental Neuroscience, IRCCS Fondazione Stella Maris, Pisa, Italy
| | - Francesco Trovato
- NEST, Istituto Nanoscienze CNR and Scuola Normale Superiore, Pisa, Italy
| | - Enrico Pracucci
- NEST, Istituto Nanoscienze CNR and Scuola Normale Superiore, Pisa, Italy
| | - Gian Michele Ratto
- NEST, Istituto Nanoscienze CNR and Scuola Normale Superiore, Pisa, Italy
| | | | - Federico Sicca
- Molecular Medicine and Clinical Neurophysiology Laboratories, Department of Developmental Neuroscience, IRCCS Fondazione Stella Maris, Pisa, Italy
| | - Filippo M Santorelli
- Molecular Medicine and Clinical Neurophysiology Laboratories, Department of Developmental Neuroscience, IRCCS Fondazione Stella Maris, Pisa, Italy
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15
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Mesgari M, Krüger J, Riemer CT, Khaleghi Ghadiri M, Kovac S, Gorji A. Gabapentin prevents cortical spreading depolarization-induced disinhibition. Neuroscience 2017; 361:1-5. [DOI: 10.1016/j.neuroscience.2017.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/28/2017] [Accepted: 08/03/2017] [Indexed: 01/29/2023]
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16
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Effects of anti-epileptic drugs on spreading depolarization-induced epileptiform activity in mouse hippocampal slices. Sci Rep 2017; 7:11884. [PMID: 28928441 PMCID: PMC5605655 DOI: 10.1038/s41598-017-12346-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 09/07/2017] [Indexed: 01/08/2023] Open
Abstract
Epilepsy and spreading depolarization (SD) are both episodic brain disorders and often exist together in the same individual. In CA1 pyramidal neurons of mouse hippocampal slices, induction of SD evoked epileptiform activities, including the ictal-like bursts, which occurred during the repolarizing phase of SD, and the subsequent generation of paroxysmal depolarization shifts (PDSs), which are characterized by mild depolarization plateau with overriding spikes. The duration of the ictal-like activity was correlated with both the recovery time and the depolarization potential of SD, whereas the parameters of PDSs were not significantly correlated with the parameters of SD. Moreover, we systematically evaluated the effects of multiple anti-epileptic drugs (AEDs) on SD-induced epileptiform activity. Among the drugs that are known to inhibit voltage-gated sodium channels, carbamazepine, phenytoin, valproate, lamotrigine, and zonisamide reduced the frequency of PDSs and the overriding firing bursts in 20–25 min after the induction of SD. The GABA uptake inhibitor tiagabine exhibited moderate effects and partially limited the incidence of PDSs after SD. AEDs including gabapentin, levetiracetam, ethosuximide, felbamate, and vigabatrin, had no significant effect on SD-induced epileptic activity. Taken together, these results demonstrate the effects of AEDs on SD and the related epileptiform activity at the cellular level.
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17
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García-Martín E, Martínez C, Serrador M, Alonso-Navarro H, Navacerrada F, Esguevillas G, García-Albea E, Agúndez JAG, Jiménez-Jiménez FJ. Gamma-Aminobutyric Acid (Gaba) Receptors Rho (Gabrr)
Gene Polymorphisms and Risk for Migraine. Headache 2017; 57:1118-1135. [DOI: 10.1111/head.13122] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 04/19/2017] [Accepted: 04/19/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Elena García-Martín
- Department of Pharmacology; University of Extremadura; Cáceres Spain
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- AMGenomics, Edificio Tajo; Avda. de la Universidad s/n Cáceres Spain
| | - Carmen Martínez
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- Department of Pharmacology; University of Extremadura; Badajoz Spain
| | - Mercedes Serrador
- Department of Family Medicine; Hospital “Príncipe de Asturias,”, Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - Hortensia Alonso-Navarro
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - Francisco Navacerrada
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Service of Neurology; Hospital “Ramón y Cajal,”, Universidad de Alcalá; Madrid Spain
| | - Gara Esguevillas
- Department of Pharmacology; University of Extremadura; Cáceres Spain
| | - Esteban García-Albea
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - José A. G. Agúndez
- Department of Pharmacology; University of Extremadura; Cáceres Spain
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- AMGenomics, Edificio Tajo; Avda. de la Universidad s/n Cáceres Spain
| | - Félix Javier Jiménez-Jiménez
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
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18
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Kramer DR, Fujii T, Ohiorhenuan I, Liu CY. Interplay between Cortical Spreading Depolarization and Seizures. Stereotact Funct Neurosurg 2017; 95:1-5. [PMID: 28088802 DOI: 10.1159/000452841] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 10/18/2016] [Indexed: 11/19/2022]
Abstract
Cortical spreading depolarization (CSD) is an electrophysiologic phenomenon found mostly in the setting of neurologic injury resulting in the disturbance of ion homeostasis and leading to changes in the local vascular response. The bioelectric etiology of CSD shares similarities to those in epileptic disorders, yet the relationship between seizures and CSD is unclear, with several studies observing cortical depression before, during, and after seizure activity, thus obscuring our understanding of whether CSD activity potentiates or limits seizures and vice versa. Cortical sampling has exhibited how the redistribution of ion concentrations in the intra- and extracellular environments interplay between the excitation of seizures and the electrical depression of CSD. Modeling of both environments has suggested that CSD synchronizes the affected tissue, creating a favorable environment for seizure activity; however, other studies have demonstrated the opposite: epileptiform activity initiating waves of CSD. Further studies have underscored the role of the vascular response and subsequent ischemia in CSD that contributes to epileptogenesis. Investigations in migraine, traumatic brain injury, and other neurologic injuries suggest that several drugs may target CSD. Manipulations in the occurrence and nature of CSD can potentially alter the threshold for seizure activity, and perhaps minimize immediate and long-term sequelae associated with epilepsy.
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Affiliation(s)
- Daniel R Kramer
- Department of Neurosurgery, University of Southern California, Los Angeles, CA, USA
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Knapp L, Szita B, Kocsis K, Vécsei L, Toldi J. Nitroglycerin enhances the propagation of cortical spreading depression: comparative studies with sumatriptan and novel kynurenic acid analogues. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 11:27-34. [PMID: 28053504 PMCID: PMC5191838 DOI: 10.2147/dddt.s117166] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background The complex pathophysiology of migraine is not yet clearly understood; therefore, experimental models are essential for the investigation of the processes related to migraine headache, which include cortical spreading depression (CSD) and NO donor-induced neurovascular changes. Data on the assessment of drug efficacy in these models are often limited, which prompted us to investigate a novel combined migraine model in which an effective pharmacon could be more easily identified. Materials and methods In vivo electrophysiological experiments were performed to investigate the effect of nitroglycerin (NTG) on CSD induced by KCl application. In addition, sumatriptan and newly synthesized neuroactive substances (analogues of the neuromodulator kynurenic acid [KYNA]) were also tested. Results The basic parameters of CSDs were unchanged following NTG administration; however, propagation failure was decreased compared to the controls. Sumatriptan decreased the number of CSDs, whereas propagation failure was as minimal as in the NTG group. On the other hand, both of the KYNA analogues restored the ratio of propagation to the control level. Discussion The ratio of propagation appeared to be the indicator of the effect of NTG. This is the first study providing direct evidence that NTG influences CSD; furthermore, we observed different effects of sumatriptan and KYNA analogues. Sumatriptan changed the generation of CSDs, whereas the analogues acted on the propagation of the waves. Our experimental design overlaps with a large spectrum of processes present in migraine pathophysiology, and it can be a useful experimental model for drug screening.
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Affiliation(s)
- Levente Knapp
- Department of Physiology, Anatomy, and Neuroscience, University of Szeged
| | - Bence Szita
- Department of Physiology, Anatomy, and Neuroscience, University of Szeged
| | - Kitti Kocsis
- Department of Physiology, Anatomy, and Neuroscience, University of Szeged; MTA-SZTE Neuroscience Research Group
| | - László Vécsei
- MTA-SZTE Neuroscience Research Group; Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Centre, University of Szeged, Szeged, Hungary
| | - József Toldi
- Department of Physiology, Anatomy, and Neuroscience, University of Szeged; MTA-SZTE Neuroscience Research Group
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Neonatal l-glutamine modulates anxiety-like behavior, cortical spreading depression, and microglial immunoreactivity: analysis in developing rats suckled on normal size- and large size litters. Amino Acids 2016; 49:337-346. [DOI: 10.1007/s00726-016-2365-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 11/11/2016] [Indexed: 12/19/2022]
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Martens-Mantai T, Speckmann EJ, Gorji A. Propagation of cortical spreading depression into the hippocampus: The role of the entorhinal cortex. Synapse 2014; 68:574-584. [PMID: 25049108 DOI: 10.1002/syn.21769] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/03/2014] [Accepted: 07/16/2014] [Indexed: 12/27/2022]
Abstract
Propagation of cortical spreading depression (CSD) to the subcortical structures could be the underlying mechanism of some neurological deficits in migraine with aura. The entorhinal cortex (EC) as a gray matter bridge between the neocortex and subcortical regions plays an important role in this propagation. In vitro combined neocortex-hippocampus brain slices were used to study the propagation pattern of CSD between the neocortex and the hippocampus. The effects of different compounds as well as tetanic electrical stimulations in the EC on propagation of CSD to the hippocampus were investigated. Repetitive induction of CSD by KCl injection in the somatosensory cortex enhanced the probability of CSD entrance to the hippocampus via EC. Local application of AMPA receptor blocker CNQX and cannabinoid receptor agonist WIN 55212-2 in EC facilitated the propagation of CSD to the hippocampus, whereas application of NMDA receptor blocker APV and GABAA receptor blocker bicuculline in this region reduced the probability of CSD penetration to the hippocampus. Application of tetanic stimulation in EC also facilitated the propagation of CSD entrance to the hippocampus. Our data suggest the importance of synaptic plasticity of EC in filtering the propagation of CSD into subcortical structures and possibly the occurrence of concomitant neurological deficits. Synapse 68:574-584, 2014. © 2014 Wiley Periodicals, Inc.
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Affiliation(s)
- Tanja Martens-Mantai
- Institute of Neurophysiology, Westfälische Wilhelms-Universität Münster, Germany
| | | | - Ali Gorji
- Institute of Neurophysiology, Westfälische Wilhelms-Universität Münster, Germany.,Department of Neurosurgery and Neurology, Epilepsy Research Center, Westfälische Wilhelms-Universität Münster, Germany.,Shefa Neuroscience Research Center, Tehran, Iran
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Seghatoleslam M, Ghadiri MK, Ghaffarian N, Speckmann EJ, Gorji A. Cortical spreading depression modulates the caudate nucleus activity. Neuroscience 2014; 267:83-90. [DOI: 10.1016/j.neuroscience.2014.02.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/13/2014] [Accepted: 02/16/2014] [Indexed: 12/24/2022]
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Eickhoff M, Kovac S, Shahabi P, Khaleghi Ghadiri M, Dreier JP, Stummer W, Speckmann EJ, Pape HC, Gorji A. Spreading depression triggers ictaform activity in partially disinhibited neuronal tissues. Exp Neurol 2014; 253:1-15. [DOI: 10.1016/j.expneurol.2013.12.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 11/19/2013] [Accepted: 12/16/2013] [Indexed: 11/17/2022]
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Nochi R, Kaneko J, Okada N, Terazono Y, Matani A, Hisatsune T. Diazepam treatment blocks the elevation of hippocampal activity and the accelerated proliferation of hippocampal neural stem cells after focal cerebral ischemia in mice. J Neurosci Res 2013; 91:1429-39. [DOI: 10.1002/jnr.23264] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 05/11/2013] [Accepted: 05/22/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Rokuya Nochi
- Department of Integrated Biosciences; The University of Tokyo; Kashiwa Chiba Japan
| | - Jun Kaneko
- Department of Integrated Biosciences; The University of Tokyo; Kashiwa Chiba Japan
| | - Natsumi Okada
- Department of Integrated Biosciences; The University of Tokyo; Kashiwa Chiba Japan
| | - Yasushi Terazono
- Department of Complexity Science and Engineering; The University of Tokyo; Kashiwa Chiba Japan
| | - Ayumu Matani
- Department of Complexity Science and Engineering; The University of Tokyo; Kashiwa Chiba Japan
| | - Tatsuhiro Hisatsune
- Department of Integrated Biosciences; The University of Tokyo; Kashiwa Chiba Japan
- Bioimaging Center; The University of Tokyo; Kashiwa Chiba Japan
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Costa C, Tozzi A, Rainero I, Cupini LM, Calabresi P, Ayata C, Sarchielli P. Cortical spreading depression as a target for anti-migraine agents. J Headache Pain 2013; 14:62. [PMID: 23879550 PMCID: PMC3728002 DOI: 10.1186/1129-2377-14-62] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 07/08/2013] [Indexed: 12/18/2022] Open
Abstract
Spreading depression (SD) is a slowly propagating wave of neuronal and glial depolarization lasting a few minutes, that can develop within the cerebral cortex or other brain areas after electrical, mechanical or chemical depolarizing stimulations. Cortical SD (CSD) is considered the neurophysiological correlate of migraine aura. It is characterized by massive increases in both extracellular K⁺ and glutamate, as well as rises in intracellular Na⁺ and Ca²⁺. These ionic shifts produce slow direct current (DC) potential shifts that can be recorded extracellularly. Moreover, CSD is associated with changes in cortical parenchymal blood flow. CSD has been shown to be a common therapeutic target for currently prescribed migraine prophylactic drugs. Yet, no effects have been observed for the antiepileptic drugs carbamazepine and oxcarbazepine, consistent with their lack of efficacy on migraine. Some molecules of interest for migraine have been tested for their effect on CSD. Specifically, blocking CSD may play an enabling role for novel benzopyran derivative tonabersat in preventing migraine with aura. Additionally, calcitonin gene-related peptide (CGRP) antagonists have been recently reported to inhibit CSD, suggesting the contribution of CGRP receptor activation to the initiation and maintenance of CSD not only at the classic vascular sites, but also at a central neuronal level. Understanding what may be lying behind this contribution, would add further insights into the mechanisms of actions for "gepants", which may be pivotal for the effectiveness of these drugs as anti-migraine agents. CSD models are useful tools for testing current and novel prophylactic drugs, providing knowledge on mechanisms of action relevant for migraine.
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Affiliation(s)
- Cinzia Costa
- Neurologic Clinic, Department of Public Health and Medical and Surgical Specialties, University of Perugia, Ospedale Santa Maria della Misericordia, Sant'Andrea delle Fratte, 06132, Perugia, Italy
- Fondazione Santa Lucia I.R.C.C.S., Via del Fosso di Fiorano, 00143, Rome, Italy
| | - Alessandro Tozzi
- Neurologic Clinic, Department of Public Health and Medical and Surgical Specialties, University of Perugia, Ospedale Santa Maria della Misericordia, Sant'Andrea delle Fratte, 06132, Perugia, Italy
- Fondazione Santa Lucia I.R.C.C.S., Via del Fosso di Fiorano, 00143, Rome, Italy
| | - Innocenzo Rainero
- Neurology II, Department of Neuroscience, University of Torino, Ospedale Molinette, Via Cherasco 15, 10126, Turin, Italy
| | | | - Paolo Calabresi
- Neurologic Clinic, Department of Public Health and Medical and Surgical Specialties, University of Perugia, Ospedale Santa Maria della Misericordia, Sant'Andrea delle Fratte, 06132, Perugia, Italy
- Fondazione Santa Lucia I.R.C.C.S., Via del Fosso di Fiorano, 00143, Rome, Italy
| | - Cenk Ayata
- Neurovascular Research Lab., Department of Radiology, Stroke Service and Neuroscience Intensive Unit Department of Neurology Massachusetts Hospital, Harvard Medical School, 02115, Boston, MA, USA
| | - Paola Sarchielli
- Neurologic Clinic, Department of Public Health and Medical and Surgical Specialties, University of Perugia, Ospedale Santa Maria della Misericordia, Sant'Andrea delle Fratte, 06132, Perugia, Italy
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Effect of systemic kynurenine on cortical spreading depression and its modulation by sex hormones in rat. Exp Neurol 2012; 236:207-14. [PMID: 22587906 DOI: 10.1016/j.expneurol.2012.05.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Revised: 04/19/2012] [Accepted: 05/05/2012] [Indexed: 12/29/2022]
Abstract
BACKGROUND The aura symptoms in migraine are most likely due to cortical spreading depression (CSD). CSD is favored by NMDA receptor activation and increased cortical excitability. The latter probably explains why migraine with aura may appear when estrogen levels are high, like during pregnancy. Kynurenic acid, a derivative of tryptophan metabolism, is an endogenous NMDA receptor antagonist whose cerebral concentrations can be augmented by systemic administration of its precursor L-kynurenine. OBJECTIVE To determine if exogenous administration of L-kynurenine is able to influence KCl-induced CSD in rat, if the effect is sex-dependent and if it differs in females between the phases of the estrous cycle. METHODS Adult Sprague-Dawley rats (n=8/group) received intraperitoneal (i.p.) injections of L-kynurenine (L-KYN, 300 mg/kg), L-KYN combined with probenecid (L-KYN+PROB) that increases cortical concentration of KYNA by blocking its excretion from the central nervous system, probenecid alone (PROB, 200 mg/kg) or NaCl. Cortical kynurenic acid concentrations were determined by HPLC (n=7). Thirty minutes after the injections, CSDs were elicited by application of 1M KCl over the occipital cortex and recorded by DC electrocorticogram. In NaCl and L-KYN groups, supplementary females were added and CSD frequency was analyzed respective to the phases of the estrous cycle determined by vaginal smears. RESULTS In both sexes, PROB, L-KYN and L-KYN+PROB increased cortical kynurenic acid level. PROB, L-KYN and L-KYN+PROB with increasing potency decreased CSD frequency in female rats, while in males such an effect was significant only for L-KYN+PROB. The inhibitory effect of L-KYN on CSD frequency in females was most potent in diestrus. CONCLUSION L-Kynurenine administration suppresses CSD, most likely by increasing kynurenic acid levels in the cortex. Females are more sensitive to this suppressive effect of L-kynurenine than males. These results emphasize the role of sex hormones in migraine and open interesting novel perspectives for its preventive treatment.
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White matter microstructural alterations in migraine: a diffusion-weighted MRI study. Pain 2012; 153:651-656. [PMID: 22244439 DOI: 10.1016/j.pain.2011.11.029] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 10/19/2011] [Accepted: 11/29/2011] [Indexed: 11/23/2022]
Abstract
Migraine is a common and disabling neurological disease. The pathomechanism that underlies the disorder is not entirely understood, and reliable biomarkers are missing. In the current analysis we looked for microstructural alterations of the brain white matter in migraine patients by means of diffusion-weighted magnetic resonance imaging. The measurements were carried out with a novel approach based on fine-tuned nonlinear registration and nonparametric permutation test in an alignment-invariant tract representation (Tract-Based Spatial Statistics). We found reduced fractional anisotropy in the right frontal white matter cluster of migraine patients. In the same region we also found increased mean diffusivity and increased radial diffusivity. The probabilistic tractography showed connection of this cluster to other parts of the pain network (orbitofrontal cortex, insula, thalamus, dorsal midbrain). We speculate that these findings reflect maladaptive plastic changes or white matter disintegration.
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Neuronal death by repetitive cortical spreading depression in juvenile rat brain. Exp Neurol 2012; 233:438-46. [DOI: 10.1016/j.expneurol.2011.11.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 10/13/2011] [Accepted: 11/10/2011] [Indexed: 01/08/2023]
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Ghadiri MK, Kozian M, Ghaffarian N, Stummer W, Kazemi H, Speckmann EJ, Gorji A. Sequential changes in neuronal activity in single neocortical neurons after spreading depression. Cephalalgia 2011; 32:116-24. [PMID: 22174359 DOI: 10.1177/0333102411431308] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Cortical spreading depression (CSD) has an important role in migraine with aura. Prolonged neuronal depression is followed by a late excitatory synaptic plasticity after CSD. METHOD Intra- and extracellular recordings were performed to investigate the effect of CSD on intracellular properties of mouse neocortical tissues in the late excitatory period. RESULTS During CSD, changes in the membrane potentials usually began with a relatively short hyperpolarization followed by an abrupt depolarization. These changes occurred roughly at the same time point after CSD as the beginning of the negative extracellular deflection. Forty-five minutes after CSD, neurons showed significantly smaller amplitude of afterhyperpolarization and a reduced input resistance. Depolarization and hyperpolarization of the cells by constant intracellular current injections in this period significantly changed the frequency of the action potentials. CONCLUSION These data indicate higher excitability of the neocortical neurons after CSD, which can be assumed to contribute to hyperexcitability of neocortical tissues in patients suffering from migraine.
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Affiliation(s)
- Maryam Khaleghi Ghadiri
- Klinik und Poliklinik für Neurochirurgie, Westfälische Wilhelms-Universität Münster, Germany
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Dreier JP, Major S, Pannek HW, Woitzik J, Scheel M, Wiesenthal D, Martus P, Winkler MKL, Hartings JA, Fabricius M, Speckmann EJ, Gorji A. Spreading convulsions, spreading depolarization and epileptogenesis in human cerebral cortex. Brain 2011; 135:259-75. [PMID: 22120143 PMCID: PMC3267981 DOI: 10.1093/brain/awr303] [Citation(s) in RCA: 185] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Spreading depolarization of cells in cerebral grey matter is characterized by massive ion translocation, neuronal swelling and large changes in direct current-coupled voltage recording. The near-complete sustained depolarization above the inactivation threshold for action potential generating channels initiates spreading depression of brain activity. In contrast, epileptic seizures show modest ion translocation and sustained depolarization below the inactivation threshold for action potential generating channels. Such modest sustained depolarization allows synchronous, highly frequent neuronal firing; ictal epileptic field potentials being its electrocorticographic and epileptic seizure its clinical correlate. Nevertheless, Leão in 1944 and Van Harreveld and Stamm in 1953 described in animals that silencing of brain activity induced by spreading depolarization changed during minimal electrical stimulations. Eventually, epileptic field potentials were recorded during the period that had originally seen spreading depression of activity. Such spreading convulsions are characterized by epileptic field potentials on the final shoulder of the large slow potential change of spreading depolarization. We here report on such spreading convulsions in monopolar subdural recordings in 2 of 25 consecutive aneurismal subarachnoid haemorrhage patients in vivo and neocortical slices from 12 patients with intractable temporal lobe epilepsy in vitro. The in vitro results suggest that γ-aminobutyric acid-mediated inhibition protects from spreading convulsions. Moreover, we describe arterial pulse artefacts mimicking epileptic field potentials in three patients with subarachnoid haemorrhage that ride on the slow potential peak. Twenty-one of the 25 subarachnoid haemorrhage patients (84%) had 656 spreading depolarizations in contrast to only three patients (12%) with 55 ictal epileptic events isolated from spreading depolarizations. Spreading depolarization frequency and depression periods per 24 h recording episodes showed an early and a delayed peak on Day 7. Patients surviving subarachnoid haemorrhage with poor outcome at 6 months showed significantly higher total and peak numbers of spreading depolarizations and significantly longer total and peak depression periods during the electrocorticographic monitoring than patients with good outcome. In a semi-structured telephone interview 3 years after the initial haemorrhage, 44% of the subarachnoid haemorrhage survivors had developed late post-haemorrhagic seizures requiring anti-convulsant medication. In those patients, peak spreading depolarization number had been significantly higher [15.1 (11.4–30.8) versus 7.0 (0.8–11.2) events per day, P = 0.045]. In summary, monopolar recordings here provided unequivocal evidence of spreading convulsions in patients. Hence, practically all major pathological cortical network events in animals have now been observed in people. Early spreading depolarizations may indicate a risk for late post-haemorrhagic seizures.
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Affiliation(s)
- Jens P Dreier
- Centre for Stroke Research Berlin, Charité University Medicine Berlin, 10117 Berlin, Germany.
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Párdutz Á, Fejes A, Bohár Z, Tar L, Toldi J, Vécsei L. Kynurenines and headache. J Neural Transm (Vienna) 2011; 119:285-96. [DOI: 10.1007/s00702-011-0665-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2011] [Accepted: 05/20/2011] [Indexed: 12/12/2022]
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Fejes A, Párdutz Á, Toldi J, Vécsei L. Kynurenine metabolites and migraine: experimental studies and therapeutic perspectives. Curr Neuropharmacol 2011; 9:376-87. [PMID: 22131946 PMCID: PMC3131728 DOI: 10.2174/157015911795596621] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Revised: 04/14/2010] [Accepted: 04/30/2010] [Indexed: 12/16/2022] Open
Abstract
Migraine is one of the commonest neurological disorders. Despite intensive research, its exact pathomechanism is still not fully understood and effective therapy is not always available. One of the key molecules involved in migraine is glutamate, whose receptors are found on the first-, second- and third-order trigeminal neurones and are also present in the migraine generators, including the dorsal raphe nucleus, nucleus raphe magnus, locus coeruleus and periaqueductal grey matter. Glutamate receptors are important in cortical spreading depression, which may be the electrophysiological correlate of migraine aura. The kynurenine metabolites, endogenous tryptophan metabolites, include kynurenic acid (KYNA), which exerts a blocking effect on ionotropic glutamate and α7-nicotinic acetylcholine receptors. Thus, KYNA and its derivatives may act as modulators at various levels of the pathomechanism of migraine. They can give rise to antinociceptive effects at the periphery, in the trigeminal nucleus caudalis, and may also act on migraine generators and cortical spreading depression. The experimental data suggest that KYNA or its derivatives might offer a novel approach to migraine therapy.
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Affiliation(s)
- Annamária Fejes
- Department of Neurology, Albert Szent-Györgyi Clinical Centre, University of Szeged, Szeged, Hungary
| | - Árpád Párdutz
- Department of Neurology, Albert Szent-Györgyi Clinical Centre, University of Szeged, Szeged, Hungary
| | - József Toldi
- Department of Physiology, Anatomy and Neuroscience, University of Szeged, Szeged, Hungary
| | - László Vécsei
- Department of Neurology, Albert Szent-Györgyi Clinical Centre, University of Szeged, Szeged, Hungary
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Addae JI, Ali N, Stone TW. Effects of AMPA and clomethiazole on spreading depression cycles in the rat neocortex in vivo. Eur J Pharmacol 2011; 653:41-6. [DOI: 10.1016/j.ejphar.2010.11.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 11/19/2010] [Accepted: 11/23/2010] [Indexed: 11/25/2022]
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Li F, Qiu E, Dong Z, Liu R, Wu S, Yu S. Protection of flunarizine on cerebral mitochondria injury induced by cortical spreading depression under hypoxic conditions. J Headache Pain 2011; 12:47-53. [PMID: 21350793 PMCID: PMC3055997 DOI: 10.1007/s10194-011-0300-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Accepted: 11/25/2010] [Indexed: 10/27/2022] Open
Abstract
A rat cortical spreading depression (CSD) model was established to explore whether cerebral mitochondria injury was induced by CSD under both normoxic and hypoxic conditions and whether flunarizine had a protective effect on cerebral mitochondria. SD rats, which were divided into seven groups, received treatment as follows: no intervention (control Group I); 1 M NaCl injections (Group II); 1 M KCl injections (Group III); intraperitoneal flunarizine (3 mg/kg) 30 min before KCl injections (Group IV); 14% O(2) inhalation before NaCl injections (Group V); 14% O(2) inhalation followed by KCl injections (Group VI); 14% O(2) inhalation and intraperitoneal flunarizine followed by KCl injections (Group VII). Following treatment, brains were removed for the analysis of mitochondria transmembrane potential (MMP) and oxidative respiratory function after recording the number, amplitude and duration of CSD. The duration of CSD was significantly longer in Group VI than that in Group III. The number and duration of CSD in Group VII was significantly lower than that in Group VI. MMP in Group VI was significantly lower than that in Group III, and MMP in Group VII was significantly higher than that in Group VI. State 4 respiration in Group VI was significantly higher than that in Group III, and state 3 respiration in Group VII was significantly higher than that in Group VI. Respiration control of rate in Group VII was also significantly higher than that in Group VI. Thus, we concluded that aggravated cerebral mitochondria injury might be attributed to CSD under hypoxic conditions. Flunarizine can alleviate such cerebral mitochondria injury under both normoxic and hypoxic conditions.
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Affiliation(s)
- Fengpeng Li
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
| | - Enchao Qiu
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
| | - Zhao Dong
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
| | - Ruozhuo Liu
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
| | - Shiwen Wu
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
| | - Shengyuan Yu
- Department of Neurology, Chinese PLA General Hospital, Beijing, 100853 China
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Andreou AP, Summ O, Charbit AR, Romero-Reyes M, Goadsby PJ. Animal models of headache: from bedside to bench and back to bedside. Expert Rev Neurother 2010; 10:389-411. [PMID: 20187862 DOI: 10.1586/ern.10.16] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In recent years bench-based studies have greatly enhanced our understanding of headache pathophysiology, while facilitating the development of new headache medicines. At present, established animal models of headache utilize activation of pain-producing cranial structures, which for a complex syndrome, such as migraine, leaves many dimensions of the syndrome unstudied. The focus on modeling the central nociceptive mechanisms and the complexity of sensory phenomena that accompany migraine may offer new approaches for the development of new therapeutics. Given the complexity of the primary headaches, multiple approaches and techniques need to be employed. As an example, recently a model for trigeminal autonomic cephalalgias has been tested successfully, while by contrast, a satisfactory model of tension-type headache has been elusive. Moreover, although useful in many regards, migraine models are yet to provide a more complete picture of the disorder.
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Affiliation(s)
- Anna P Andreou
- Headache Group - Department of Neurology, University of California, San Francisco, San Francisco, CA 94115, USA
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Jafarian M, Rahimi S, Behnam F, Hosseini M, Haghir H, Sadeghzadeh B, Gorji A. The effect of repetitive spreading depression on neuronal damage in juvenile rat brain. Neuroscience 2010; 169:388-94. [PMID: 20438812 DOI: 10.1016/j.neuroscience.2010.04.062] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 04/20/2010] [Accepted: 04/25/2010] [Indexed: 10/19/2022]
Abstract
Spreading depression (SD) is pronounced depolarization of neurons and glia that travels slowly across brain tissue followed by massive redistribution of ions between intra- and extracellular compartments. There is a relationship between SD and some neurological disorders. In the present study the effects of repetitive SD on neuronal damage in cortical and subcortical regions of juvenile rat brain were investigated. The animals were anesthetized and the electrodes as well as cannula were implanted over the brain. SD-like event was induced by KCl injection. The brains were removed after 2 or 4 weeks after induction of 2 or 4 SD-like waves (with interval of 1 week), respectively. Normal saline was injected instead of KCl in sham group. For stereological study, paraffin-embedded brains were cut in 5 microm sections. The sections were stained with Toluidine Blue to measure the volume-weighted mean volume of normal neurons and the numerical density of dark neurons. The volume-weighted mean volume of normal neurons in the granular layer of the dentate gyrus and layer V of the temporal cortex in SD group were significantly decreased after four repetitive SD. Furthermore, densities of dark neurons in the granular layer of the dentate gyrus (after 2 weeks), the caudate-putamen, and layer V of the temporal cortex (after 4 weeks) were significantly increased in SD group. Repetitive cortical SD in juvenile rats may cause neuronal damage in cortical and subcortical areas of the brain. This may important in pathophysiology of SD-related neurological disorders.
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Affiliation(s)
- M Jafarian
- Department of Anatomy, Mashhad University of Medical Sciences, Mashhad, Iran; Shefa Neuroscience Center, Tehran, Iran
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Campeau S, Nyhuis TJ, Kryskow EM, Masini CV, Babb JA, Sasse SK, Greenwood BN, Fleshner M, Day HEW. Stress rapidly increases alpha 1d adrenergic receptor mRNA in the rat dentate gyrus. Brain Res 2010; 1323:109-18. [PMID: 20138850 DOI: 10.1016/j.brainres.2010.01.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 01/26/2010] [Accepted: 01/28/2010] [Indexed: 01/30/2023]
Abstract
The hippocampal formation is a highly plastic brain region that is sensitive to stress. It receives extensive noradrenergic projections, and noradrenaline is released in the hippocampus in response to stressor exposure. The hippocampus expresses particularly high levels of the alpha(1D) adrenergic receptor (ADR) and we have previously demonstrated that alpha(1d) ADR mRNA expression in the rat hippocampus is modulated by corticosterone. One of the defining features of a stress response is activation of the hypothalamic pituitary adrenal (HPA) axis, resulting in the release of corticosterone from the adrenal glands. However, the effect of stress on hippocampal expression of alpha(1d) ADR mRNA has not been determined. In this study, male rats were exposed to inescapable tail shock, loud noise or restraint, and the effect on alpha(1d) ADR mRNA expression in the hippocampus was determined by semi-quantitative in situ hybridization. All three stressors resulted in a rapid upregulation of alpha(1d) ADR mRNA in the dentate gyrus, with expression peaking at approximately 90min after the start of the stressor. Physical activity has previously been reported to counteract some of the effects of stress that occur within the dentate gyrus. However, 6weeks of voluntary wheel running in rats did not prevent the restraint stress-induced increase in alpha(1d) ADR mRNA expression in the dentate gyrus. Although the function of the alpha(1D) ADR in the dentate gyrus is not known, these data provide further evidence for a close interaction between stress and the noradrenergic system in the hippocampus.
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Affiliation(s)
- Serge Campeau
- Department of Psychology and Neuroscience, University of Colorado, Boulder, USA
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Affiliation(s)
- Thorsten Bartsch
- Department of Neurology, University Hospital Schleswig-Holstein, University of Kiel, Kiel, Germany.
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