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Cortical spreading depression

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https://www.readbyqxmd.com/read/28891432/neonatal-treatment-with-ovarian-hormones-and-suckling-among-distinct-litter-sizes-differential-effects-on-recognition-memory-and-spreading-depression-at-adulthood
#1
Noranege Epifânio Accioly, Rubem Carlos Araújo Guedes
OBJECTIVES: Ovarian hormones (OH) and early malnutrition may affect the developing brain, with repercussions on behavioral and excitability-dependent processes. However, the possible synergistic effects of both factors have not been analyzed. In this study, we investigated the effect of treatment in early life with OH and suckling among distinct litter sizes on recognition memory, anxiety behavior, and the excitability-dependent phenomenon known as cortical spreading depression (CSD)...
September 10, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28864364/role-of-astrocyte-connexin-hemichannels-in-cortical-spreading-depression
#2
REVIEW
Maximiliano Rovegno, Juan C Sáez
Cortical spreading depression (CSD) is an intriguing phenomenon consisting of massive slow brain depolarizations that affects neurons and glial cells. It has been recognized since 1944, but its pathogenesis has only been uncovered during the last decade. Acute brain injuries can be further complicated by CSD in more than 50% of severe cases. This phenomenon is repetitive and produces a metabolic overload that increments secondary damage. Propagation of CSD is known to be linked to excitotoxicity, but the mechanisms associated with its initiation remain less understood...
August 29, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28842982/novel-therapeutic-targets-against-spreading-depression
#3
REVIEW
Shih-Pin Chen, Cenk Ayata
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...
August 26, 2017: Headache
https://www.readbyqxmd.com/read/28751192/evidence-of-an-inverse-correlation-between-serotonergic-activity-and-spreading-depression-propagation-in-the-rat-cortex
#4
Rubem Carlos Araújo Guedes, Maria das Graças Rodrigues de Araújo, Taciana Cristovam Verçosa, Francisca Martins Bion, Andrea Lima de Sá, Antônio Pereira, Ricardo Abadie-Guedes
Various neurological and psychiatric diseases lead to alterations in cortical serotonergic activity as one of their underlying processes. However, the electrophysiological implication of changes in serotonergic activity remains a matter of investigation. In this study, we investigated whether brain serotonergic activity influences the excitability-related phenomenon known as cortical spreading depression (CSD). CSD parameters (propagation velocity, and amplitude and duration of the DC-shift) was evaluated in rats that received two treatments that increased cortical serotonergic activity, electrical stimulation of the raphe nuclei and subcutaneous injection of a selective serotonin reuptake inhibitor, sumatriptan...
October 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28750590/initiation-of-spreading-depression-by-synaptic-and-network-hyperactivity-insights-into-trigger-mechanisms-of-migraine-aura
#5
Lyudmila V Vinogradova
Background Cortical spreading depression (SD) is thought to underlie migraine aura but mechanisms of triggering SD in the structurally normal, well-nourished cortex of migraine patients remain unknown. Synaptic and network dysfunctions appear to underlie episodic neurological disorders, including migraine. The narrative review summarizes old and recent experimental evidence for triggering SD by synaptic/network mechanisms and discusses the relevance of the data to migraine pathogenesis. Our hypothesis is that under some conditions synaptic/network hyperactivity may reliably ignite SD, and this mechanism may underlie triggering migraine aura in patients...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28688801/new-onset-hemodialysis-related-headache-presenting-as-migraine-aura
#6
Domenico Chirchiglia, Michele Andreucci, Attilio Della Torre, Serena Marianna Lavano, Pasquale Chirchiglia, Angelo Lavano
Hemodialysis headache (HDH) is an infrequent new-onset symptom, occurring mainly in old uremic patients. Type of pain is nonspecific, occurs during hemodialysis treatment, assuming features similar to tension-type headache and representing a problem, also as regards the therapy to be taken. International Headache Society (IHS) has placed this form of headache among the headaches disorders of homeostasis. We found a case of new-onset HDH in old uremic man, presenting with migraine aura features. A similar case has not been reported in literature, placing us some questions: why and how does this happen? What are the mechanisms involved? Role of trigeminal-vascular system and cortical spreading depression as regards the aura could be considered, through the activation of neuroinflammatory events, lastly causing migraine aura...
June 29, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28642283/selective-inhibition-of-trigeminovascular-neurons-by-fremanezumab-a-humanized-monoclonal-anti-cgrp-antibody
#7
Agustin Melo-Carrillo, Rodrigo Noseda, Rony Nir, Aaron J Schain, Jennifer Stratton, Andrew M Strassman, Rami Burstein
A large body of evidence supports an important role for calcitonin gene-related peptide (CGRP) in migraine pathophysiology. This evidence gave rise to a global effort to develop a new generation of therapeutics that inhibit the interaction of CGRP with its receptor in migraineurs. Recently, a new class of such drugs, humanized anti-CGRP monoclonal antibodies (CGRP-mAbs), were found to be effective in reducing the frequency of migraine. The purpose of this study was to better understand how the CGRP-mAb fremanezumab (TEV-48125) modulates meningeal sensory pathways...
July 26, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28612259/apoptosis-following-cortical-spreading-depression-in-juvenile-rats
#8
Ali Jahanbazi Jahan-Abad, Leila Alizadeh, Sajad Sahab Negah, Parastoo Barati, Maryam Khaleghi Ghadiri, Sven G Meuth, Stjepana Kovac, Ali Gorji
Repetitive cortical spreading depression (CSD) can lead to cell death in immature brain tissue. Caspases are involved in neuronal cell death in several CSD-related neurological disorders, such as stroke and epilepsy. Yet, whether repetitive CSD itself can induce caspase activation in adult or juvenile tissue remains unknown. Inducing repetitive CSD in somatosensory cortices of juvenile and adult rats in vivo, we thus aimed to investigate the effect of repetitive CSD on the expression caspase-3, caspase-8, caspase-9, and caspase-12 in different brain regions using immunohistochemistry and western blotting techniques...
June 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28560708/tonabersat-prevents-inflammatory-damage-in-the-central-nervous-system-by-blocking-connexin43-hemichannels
#9
Yeri Kim, Jarred M Griffin, Mohd N Mat Nor, Jie Zhang, Peter S Freestone, Helen V Danesh-Meyer, Ilva D Rupenthal, Monica Acosta, Louise F B Nicholson, Simon J O'Carroll, Colin R Green
The cis benzopyran compound tonabersat (SB-220453) has previously been reported to inhibit connexin26 expression in the brain by attenuating the p38-mitogen-activated protein kinase pathway. We show here that tonabersat directly inhibits connexin43 hemichannel opening. Connexin43 hemichannels have been called "pathological pores" based upon their role in secondary lesion spread, edema, inflammation, and neuronal loss following central nervous system injuries, as well as in chronic inflammatory disease. Both connexin43 hemichannels and pannexin channels released adenosine triphosphate (ATP) during ischemia in an in vitro ischemia model, but only connexin43 hemichannels contributed to ATP release during reperfusion...
May 30, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28542895/aura-and-other-neurologic-dysfunction-in-or-with-migraine
#10
Narayan R Kissoon, Fred Michael Cutrer
PREMISE: Migraine can present with a wide range of neurological symptoms. PROBLEM: Based on currently available data, the symptoms of typical migraine aura are most likely related to cortical spreading depression (CSD), and evidence supports that CSD can lead to trigeminovascular activation resulting in the headache phase of migraine. POTENTIAL SOLUTION: An alternative diagnosis to migraine aura should be considered if migrainous headaches present with transient neurological symptoms that have features inconsistent with aura...
July 2017: Headache
https://www.readbyqxmd.com/read/28527083/shared-mechanisms-of-epilepsy-migraine-and-affective-disorders
#11
Davide Zarcone, Simona Corbetta
Since the nineteenth century several clinical features have been observed in common between migraine and epilepsy (such as episodic attacks, triggering factors, presence of aura, frequent familiarity), but only in recent years researchers have really engaged in finding a common pathogenic mechanism. From studies of disease incidence, we understand how either migraine among patients with epilepsy or epilepsy among migraine patients are more frequent than in the general population. This association may result from a direct causality, by the same environmental risk factors and/or by a common genetic susceptibility...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28527076/the-role-of-visual-system-in-migraine
#12
Stefania Bianchi Marzoli, Alessandra Criscuoli
The visual system is involved in different ways in migraine. Visual auras are the most common form of migraine aura. It may consist of positive or negative visual symptoms and cortical spreading depression is felt to be the phenomenon that underlies it. Even in migraine without aura, vision it is not totally excluded given that one of the major criteria for the diagnosis of migraine is photophobia. In persistent visual aura, patients refer symptoms defined as visual snow and television static. In retinal migraine unilateral decreased vision or complete visual loss occurs...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28479338/effects-of-experimental-traumatic-brain-injury-and-impaired-glutamate-transport-on-cortical-spreading-depression
#13
Mahshid Sadat Hosseini-Zare, Feng Gu, Ahmad Abdulla, Simon Powell, Jokūbas Žiburkus
Cortical spreading depression (CSD) is associated with traumatic brain injury (TBI), stroke, migraines, and seizures. Typically, following TBIs and other insults, neuronal excitability in and around the area of the injury is affected, with reported increases in local glutamate signaling. Astrocytic glutamate transporters are critical for precise regulation of the extracellular glutamate availability. However, it remains unclear how impaired astrocytic glutamate transport or an acute TBI affect characteristics of the CSD...
September 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28450192/do-the-accelerating-actions-of-tianeptine-and-l-arginine-on-cortical-spreading-depression-interact-an-electrophysiological-analysis-in-young-and-adult-rats
#14
Luciana Maria Silva de Seixas Maia, Angela Amancio-Dos-Santos, Paula Catirina Pereira da Silva Germano, Anna Carolina Santos Marinho Falcão, Desirré Duda-de-Oliveira, Rubem Carlos Araújo Guedes
In the rat, we previously demonstrated that serotonin-enhancing drugs impair cortical spreading depression (CSD) and that l-arginine (arginine) treatment enhances CSD. Here, we investigated the interaction between topical application of the serotonin uptake enhancer tianeptine and systemic arginine administration on CSD. From postnatal day 7-28, female Wistar rats (n=40) received by gavage 300mg/Kg/day arginine (n=20) or water (n=20). Half of the arginine- or water-treated rats underwent CSD recording at 30-40days of age (young), while the other half was recorded at 90-120days (adult)...
April 25, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28430860/increased-brainstem-perfusion-but-no-blood-brain-barrier-disruption-during-attacks-of-migraine-with-aura
#15
Anders Hougaard, Faisal M Amin, Casper E Christensen, Samaira Younis, Frauke Wolfram, Stig P Cramer, Henrik B W Larsson, Messoud Ashina
See Moskowitz (doi:10.1093/brain/awx099) for a scientific commentary on this article.The migraine aura is characterized by transient focal cortical disturbances causing dramatic neurological symptoms that are usually followed by migraine headache. It is currently not understood how the aura symptoms are related to the headache phase of migraine. Animal studies suggest that cortical spreading depression, the likely mechanism of migraine aura, causes disruption of the blood-brain barrier and noxious stimulation of trigeminal afferents leading to activation of brainstem nuclei and triggering of migraine headache...
June 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28382614/migraine-with-multiple-sensory-auras
#16
Nicodemus E Oey, Yew Long Lo
Migraine auras are typically visual in nature but can manifest as disturbances in somatosensory, auditory, and olfactory senses. Reports of multiple sensory auras are rare in the literature, but their existence may offer novel insights into the pathogenesis of this highly common yet complex neurological condition. Here we report a case of multiple sensory auras involving somatosensory, auditory, and olfactory disturbances in a patient with migraine without visual manifestations. A 45-year-old woman with a 20-year history of migrainous headaches presented with complaints of rightsided facial and hand numbness and paraesthesia...
December 15, 2016: Acta Neurologica Taiwanica
https://www.readbyqxmd.com/read/28372497/astrocyte-mediated-inflammation-in-cortical-spreading-depression
#17
Amir Ghaemi, Leila Alizadeh, Shahnaz Babaei, Maryam Jafarian, Maryam Khaleghi Ghadiri, Sven G Meuth, Stjepana Kovac, Ali Gorji
Background Cortical spreading depression (CSD) related diseases such as migraine, cerebrovascular diseases, and epilepsy have been associated with reactive astrocytosis, yet the mechanisms of these tissue changes remain unclear. CSD-induced inflammatory response has been proposed to play a role in some neurological disorders and thus may also contribute to reactive astrocytosis. Methods Using ex vivo brain slices and in vitro astrocytic cultures, we aimed to characterize CSD related changes in astrocytes and markers of inflammation by immunocyto- and immunohistochemistry...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28365776/deletion-of-aquaporin-4-curtails-extracellular-glutamate-elevation-in-cortical-spreading-depression-in-awake-mice
#18
Rune Enger, Didrik B Dukefoss, Wannan Tang, Klas H Pettersen, Daniel M Bjørnstad, P Johannes Helm, Vidar Jensen, Rolf Sprengel, Koen Vervaeke, Ole P Ottersen, Erlend A Nagelhus
Cortical spreading depression (CSD) is a phenomenon that challenges the homeostatic mechanisms on which normal brain function so critically depends. Analyzing the sequence of events in CSD holds the potential of providing new insight in the physiological processes underlying normal brain function as well as the pathophysiology of neurological conditions characterized by ionic dyshomeostasis. Here, we have studied the sequential progression of CSD in awake wild-type mice and in mice lacking aquaporin-4 (AQP4) or inositol 1,4,5-triphosphate type 2 receptor (IP3R2)...
January 1, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28325558/l-citrulline-ameliorates-cerebral-blood-flow-during-cortical-spreading-depression-in-rats-involvement-of-nitric-oxide-and-prostanoids-mediated-pathway
#19
Yuki Kurauchi, Koichi Mokudai, Asami Mori, Kenji Sakamoto, Tsutomu Nakahara, Masahiko Morita, Ayako Kamimura, Kunio Ishii
l-Citrulline is a potent precursor of l-arginine, and exerts beneficial effect on cardiovascular system via nitric oxide (NO) production. Migraine is one of the most popular neurovascular disorder, and imbalance of cerebral blood flow (CBF) observed in cortical spreading depression (CSD) contributes to the mechanism of migraine aura. Here, we investigated the effect of l-citrulline on cardiovascular changes to KCl-induced CSD. in rats. Intravenous injection of l-citrulline prevented the decrease in CBF, monitored by laser Doppler flowmetry, without affecting mean arterial pressure and heart rate during CSD...
March 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28283957/migraine-and-stroke-what-s-the-link-what-to-do
#20
REVIEW
Anna Gryglas, Robert Smigiel
Migraine and stroke are common, disabling neurologic disorders, with a high socioeconomic burden. A link between them has been proposed years ago, and various theories have been proposed to explain this bidirectional relation. However, the precise causes remain unclear. We briefly summarize existing hypotheses of this correlation seeking for recommendations for stroke prevention in migraineurs, if any exist. Among the strongest suggested theories of migraine-stroke association are cortical spreading depression, endovascular dysfunction, vasoconstriction, neurogenic inflammation, hypercoagulability, increased prevalence of vascular risk factors, shared genetic defects, cervical artery dissection, and patent foramen ovale...
March 2017: Current Neurology and Neuroscience Reports
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