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Cortical spreading depression

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https://www.readbyqxmd.com/read/27919769/transcriptomic-changes-in-rat-cortex-and-brainstem-after-cortical-spreading-depression-with-or-without-pre-treatment-with-migraine-prophylactic-drugs
#1
Cèlia Sintas, Noèlia Fernàndez-Castillo, Marta Vila-Pueyo, Patricia Pozo-Rosich, Alfons Macaya, Bru Cormand
: Migraine with aura is a subtype of migraine consisting of neurological disturbances that usually precede headache. Cortical spreading depression (CSD) is the likely pathophysiological correlate of the aura phase of migraine, found in common and rare forms of migraine, such as familial hemiplegic migraine (FHM). CSD is a depolarization wave that propagates across the cerebral gray matter transiently suppressing neuronal activity. Prophylactic treatments for migraine, such as topiramate (TPM) or valproate (VPA), reduce the number of CSD events...
December 2, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27919019/induction-of-calcitonin-gene-related-peptide-expression-in-rats-by-cortical-spreading-depression
#2
Yan Wang, Anne E Tye, Junli Zhao, Dongqing Ma, Ann C Raddant, Fan Bu, Benjamin L Spector, Nolan K Winslow, Minyan Wang, Andrew F Russo
OBJECTIVE: The neuropeptide calcitonin gene-related peptide (CGRP) has now been established as a key player in migraine. However, the mechanisms underlying the reported elevation of CGRP in the serum and cerebrospinal fluid of some migraineurs are not known. A candidate mechanism is cortical spreading depression (CSD), which is associated with migraine with aura and traumatic brain injury. The aim of this study was to investigate whether CGRP gene expression may be induced by experimental CSD in the rat cerebral cortex...
November 9, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27873013/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
#3
Denise Sandrelly Cavalcanti de Lima, Elian da Silva Francisco, Cássia Borges Lima, Rubem Carlos Araújo Guedes
In mammals, L-glutamine (Gln) can alter the glutamate-Gln cycle and consequently brain excitability. Here, we investigated in developing rats the effect of treatment with different doses of Gln on anxiety-like behavior, cortical spreading depression (CSD), and microglial activation expressed as Iba1-immunoreactivity. Wistar rats were suckled in litters with 9 and 15 pups (groups L 9 and L 15; respectively, normal size- and large size litters). From postnatal days (P) 7-27, the animals received Gln per gavage (250, 500 or 750 mg/kg/day), or vehicle (water), or no treatment (naive)...
November 21, 2016: Amino Acids
https://www.readbyqxmd.com/read/27774587/unique-ct-perfusion-imaging-in-a-case-of-handl-new-insight-into-handl-pathophysiology-and-vasomotor-principles-of-cortical-spreading-depression
#4
Matthew J Burke, Michael J Lamb, Marika Hohol, Christine Lay
BACKGROUND: The etiology of HaNDL is not known. Recent neuroimaging studies have suggested that there may be altered cerebrovascular blood flow during acute episodes. However, what exactly these vascular changes represent and how they may relate to the overall pathogenesis of HaNDL is uncertain. CASE: A 42-year-old, right-handed male, presented with acute aphasia and right arm weakness. Urgent CT/CT-angiogram were normal except for an incidental hypoplastic right anterior cerebral artery (ACA) A1 segment...
October 24, 2016: Headache
https://www.readbyqxmd.com/read/27770521/tonic-influence-of-neocortex-on-hippocampal-seizures
#5
E Saralidze, L Khuchua, I Kobaidze
The interaction between different brain structures could be crucial to predicting seizure occurrence, threshold and spread. Moreover, the sleep-wake cycle and electrical activity of brain structures in different phases of sleep could significantly affect the pattern and extent of seizure spread, and therefore the characteristics of epileptic activity. In this animal model using 15 Wistar rats, we show that the duration of hippocampal seizures, induced by electrical stimulation of the hippocampus, is significantly increased during slow sleep...
September 2016: Georgian Medical News
https://www.readbyqxmd.com/read/27739943/letter-to-the-editor-cortical-spreading-depression
#6
Daniel San-Juan, Andres Jaramillo-Gonzalez, Roberto Diaz-Peregrino, Arturo Olivares Rivera, Edgar Santos
No abstract text is available yet for this article.
October 14, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27730322/effects-of-glia-in-a-triphasic-continuum-model-of-cortical-spreading-depression
#7
Rosemary O'Connell, Yoichiro Mori
Cortical spreading depression (SD) is a spreading disruption in brain ionic homeostasis during which neurons experience complete and prolonged depolarizations. SD is generally believed to be the physiological substrate of migraine aura and is associated with many other brain pathologies. Here, we perform simulations with a model of SD treating brain tissue as a triphasic continuum of neurons, glia and the extracellular space. A thermodynamically consistent incorporation of the major biophysical effects, including ionic electrodiffusion and osmotic water flow, allows for the computation of important physiological variables including the extracellular voltage (DC) shift...
October 2016: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/27714802/persistent-and-repetitive-visual-disturbances-in-migraine-a-review
#8
Christoph J Schankin, Michele Viana, Peter J Goadsby
Visual disturbances in migraineurs, such as visual aura, are typically episodic, that is, associated with the headache attack, and overlaid by head pain and other symptoms that impact the patient. In some patients, however, visual symptoms are dominant due to frequency (migraine aura status), duration (persistent migraine aura and other persistent positive visual phenomena), or complexity (visual snow syndrome). These syndromes are more rare and challenging to classify in clinical practice resulting in a lack of systematic studies on pathophysiology and treatment...
October 7, 2016: Headache
https://www.readbyqxmd.com/read/27646675/neonatal-administration-of-goat-whey-modulates-memory-and-cortical-spreading-depression-in-rats-previously-suckled-under-different-litter-sizes-possible-role-of-sialic-acid
#9
Larissa de Brito Medeiros, Suênia Marcele Vitor-de-Lima, Regina de Deus Lira Benevides, Rita de Cássia Ramos do Egypto Queiroga, Rubem Carlos Araújo Guedes
OBJECTIVES: Goat whey, a usually discarded byproduct from goat cheese manufacturing, is a good source of sialic acid (SA), an oligosaccharide that is involved in processes such as memory and brain excitability. Here, we investigated in rats the effect of dried goat whey (DGW) on memory and the brain excitability-dependent phenomenon known as cortical spreading depression (CSD). We also provide evidence for the involvement of SA in this effect. In addition, we tested animals under unfavorable suckling conditions to evaluate whether nutritional deficiency would modulate DGW action...
September 20, 2016: Nutritional Neuroscience
https://www.readbyqxmd.com/read/27614225/traumatic-brain-injury-induced-autoregulatory-dysfunction-and-spreading-depression-related-neurovascular-uncoupling-pathomechanism-and-therapeutic-implications
#10
Peter Toth, Nikolett Szarka, Eszter Farkas, Erzsebet Ezer, Endre Czeiter, Krisztina Amrein, Zoltan I Ungvari, Jed A Hartings, Andras Buki, Akos Koller
Traumatic brain injury (TBI) is a major health problem worldwide. In addition to its high mortality (35-40%) survivors are left with cognitive, behavioral and communicative disabilities. While little can be done to reverse initial, primary brain damage caused by trauma, the secondary injury of cerebral tissue due to cerebromicrovascular alterations and dysregulation of cerebral blood flow (CBF) is potentially preventable. This review focuses on functional, cellular and molecular changes of autoregulatory function of CBF (with special focus on cerebrovascular myogenic response) that occur in cerebral circulation after TBI and explores the links between autoregulatory dysfunction, impaired myogenic response, microvascular impairment and the development of secondary brain damage...
September 9, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27538287/-the-effect-of-cortical-spreading-depression-wave-on-eeg-spectral-power-anaesthesed-and-conscious-rats
#11
V I Koroleva, D S Sakharov, A V Bogdanov
EEG power changes in anaesthetized and conscious rats were studied (under repeated experiments) in wide frequency band (0.1-200 Hz) during cortical spreading depression wave (SD). In anaesthetized rats the decrease of EEG spectral power was shown through all diapasons under consideration. The most pronounced decay of the EEG power was marked in the 30-40 Hz band (27.3 ± 18.5, p = 2.46 x 10-(11)). In other frequency ranges the power decrease was less but its significance remained high. In conscious rats the simultaneous decay of the EEG power from 20 to 100 Hz range was also the most informative index of SD wave...
March 2016: Zhurnal Vyssheĭ Nervnoĭ Deiatelnosti Imeni I P Pavlova
https://www.readbyqxmd.com/read/27468234/cortical-spreading-depression-produces-a-neuroprotective-effect-activating-mitochondrial-uncoupling-protein-5
#12
Emanuela Viggiano, Vincenzo Monda, Antonietta Messina, Fiorenzo Moscatelli, Anna Valenzano, Domenico Tafuri, Giuseppe Cibelli, Bruno De Luca, Giovanni Messina, Marcellino Monda
Depression of electrocorticogram propagating over the cortex surface results in cortical spreading depression (CSD), which is probably related to the pathophysiology of stroke, epilepsy, and migraine. However, preconditioning with CSD produces neuroprotection to subsequent ischemic episodes. Such effects require the expression or activation of several genes, including neuroprotective ones. Recently, it has been demonstrated that the expression of the uncoupling proteins (UCPs) 2 and 5 is amplified during brain ischemia and their expression exerts a long-term effect upon neuron protection...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27442245/the-facilitating-effect-of-unfavorable-lactation-on-the-potentiation-of-electrocorticogram-after-spreading-depression-in-awake-and-anesthetized-adult-rats
#13
Thays Kallyne Marinho de Souza, Mariana Barros E Silva-Gondim, Marcelo Cairrão Araújo Rodrigues, Rubem Carlos Araújo Guedes
OBJECTIVES: Cortical spreading depression (CSD) is a brain excitability-related phenomenon that can be affected by unfavorable conditions of lactation and by anesthetic agents. We have previously demonstrated that after CSD the electrocorticogram (ECoG) amplitude increases significantly (ECoG potentiation). Here, we investigated this potentiation in awake and anesthetized adult rats that were previously suckled among different lactation conditions. METHODS: Newborn rats were suckled in litters with 6 pups or 12 pups (L6 or L12 condition, respectively)...
July 21, 2016: Nutritional Neuroscience
https://www.readbyqxmd.com/read/27423601/genetic-insights-into-migraine-and-glutamate-a-protagonist-driving-the-headache
#14
REVIEW
Claudia F Gasparini, Robert A Smith, Lyn R Griffiths
Migraine is a complex polygenic disorder that continues to be a great source of morbidity in the developed world with a prevalence of 12% in the Caucasian population. Genetic and pharmacological studies have implicated the glutamate pathway in migraine pathophysiology. Glutamate profoundly impacts brain circuits that regulate core symptom domains in a range of neuropsychiatric conditions and thus remains a "hot" target for drug discovery. Glutamate has been implicated in cortical spreading depression (CSD), the phenomenon responsible for migraine with aura and in animal models carrying FHM mutations...
August 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27381828/spreading-depolarization-triggered-by-elevated-potassium-is-weak-or-absent-in-the-rodent-lower-brain
#15
R David Andrew, Yi-Ting Hsieh, C Devin Brisson
We examined in live coronal slices from rat and mouse which brain regions generate potassium-triggered spreading depolarization (SDKt). This technique simulates cortical spreading depression, which underlies migraine aura in the intact brain. An SDKt episode was evoked by increasing bath [K(+)]o and recorded as a propagating front of elevated light transmittance representing transient neuronal swelling in gray matter of neocortex, hippocampus, striatum, and thalamus. In contrast, SDKt was not imaged in hypothalamic nuclei or brainstem with exception of those nuclei near the dorsal brainstem surface...
July 5, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27362770/involvement-of-cgrp-receptors-in-retinal-spreading-depression
#16
Yan Wang, Yanli Li, Minyan Wang
BACKGROUND: Cortical spreading depression (CSD) is a transient propagating excitation of synaptic activity followed by depression, which is implicated in migraine with aura and is regarded as the underlying cause of migraine. Calcitonin-gene related peptide (CGRP) receptors play a crucial role in mediating the magnitude of CSD in rat cortical slice. This study aimed to examine whether CGRP receptors are involved in retinal spreading depression (RSD) in chicks. METHODS: Western blot was used for detection of calcitonin-receptor like receptor (CALCRL) and intrinsic optical imaging was used for pharmacological investigation...
October 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27354390/defective-glutamate-and-k-clearance-by-cortical-astrocytes-in-familial-hemiplegic-migraine-type-2
#17
Clizia Capuani, Marcello Melone, Angelita Tottene, Luca Bragina, Giovanna Crivellaro, Mirko Santello, Giorgio Casari, Fiorenzo Conti, Daniela Pietrobon
Migraine is a common disabling brain disorder. A subtype of migraine with aura (familial hemiplegic migraine type 2: FHM2) is caused by loss-of-function mutations in α2 Na(+),K(+) ATPase (α2 NKA), an isoform almost exclusively expressed in astrocytes in adult brain. Cortical spreading depression (CSD), the phenomenon that underlies migraine aura and activates migraine headache mechanisms, is facilitated in heterozygous FHM2-knockin mice with reduced expression of α2 NKA The mechanisms underlying an increased susceptibility to CSD in FHM2 are unknown...
2016: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/27354095/-spreading-depression-of-le%C3%A3-o-and-its-emerging-relevance-to-acute-brain-injury-in-humans
#18
Martin Lauritzen, Anthony J Strong
A new research field in translational neuroscience has opened as a result of the recognition since 2002 that "spreading depression of Leão" can be detected in many patients with acute brain injury, whether vascular and spontaneous, or traumatic in origin, as well as in those many individuals experiencing the visual (or sensorimotor) aura of migraine. In this review, we trace from their first description in rabbits through to their detection and study in migraine and the injured human brain, and from our personal perspectives, the evolution of understanding of the importance of spread of mass depolarisations in cerebral grey matter...
June 28, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27328690/the-continuum-of-spreading-depolarizations-in-acute-cortical-lesion-development-examining-le%C3%A3-o-s-legacy
#19
Jed A Hartings, C William Shuttleworth, Sergei A Kirov, Cenk Ayata, Jason M Hinzman, Brandon Foreman, R David Andrew, Martyn G Boutelle, K C Brennan, Andrew P Carlson, Markus A Dahlem, Christoph Drenckhahn, Christian Dohmen, Martin Fabricius, Eszter Farkas, Delphine Feuerstein, Rudolf Graf, Raimund Helbok, Martin Lauritzen, Sebastian Major, Ana I Oliveira-Ferreira, Frank Richter, Eric S Rosenthal, Oliver W Sakowitz, Renán Sánchez-Porras, Edgar Santos, Michael Schöll, Anthony J Strong, Anja Urbach, M Brandon Westover, Maren Kl Winkler, Otto W Witte, Johannes Woitzik, Jens P Dreier
A modern understanding of how cerebral cortical lesions develop after acute brain injury is based on Aristides Leão's historic discoveries of spreading depression and asphyxial/anoxic depolarization. Treated as separate entities for decades, we now appreciate that these events define a continuum of spreading mass depolarizations, a concept that is central to understanding their pathologic effects. Within minutes of acute severe ischemia, the onset of persistent depolarization triggers the breakdown of ion homeostasis and development of cytotoxic edema...
June 21, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27324232/-migraine-with-visual-aura
#20
REVIEW
S Bidot, D Biotti
Migraine with visual aura is marked by recurrent episodes of transient visual disturbance, often followed by headaches. Its pathophysiology has not been fully understood, but visual auras might be related to a self-propagating wave of cortical depolarization called "cortical spreading depression", triggering a trigemino-vascular "storm" ultimately leading to headaches. The most specific visual symptom is the "fortification spectrum" consisting of glimmering jagged lines spreading from the center to the periphery, and leaving a transient scotoma in its wake...
June 2016: Journal Français D'ophtalmologie
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