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Summ O, Andreou AP, Akerman S, Holland PR, Hoffmann J, Goadsby PJ. Differential actions of indomethacin: clinical relevance in headache. Pain 2021; 162:591-599. [PMID: 32796319 PMCID: PMC7808353 DOI: 10.1097/j.pain.0000000000002032] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/16/2020] [Accepted: 07/27/2020] [Indexed: 12/24/2022]
Abstract
ABSTRACT Nonsteroidal anti-inflammatory drugs, cyclooxygenase inhibitors, are used routinely in the treatment of primary headache disorders. Indomethacin is unique in its use in the diagnosis and treatment of hemicrania continua and paroxysmal hemicrania. The mechanism of this specific action is not fully understood, although an interaction with nitric oxide (NO) signaling pathways has been suggested. Trigeminovascular neurons were activated by dural electrical stimulation, systemic administration of an NO donor, or local microiontophoresis of L-glutamate. Using electrophysiological techniques, we subsequently recorded the activation of trigeminovascular neurons and their responses to intravenous indomethacin, naproxen, and ibuprofen. Administration of indomethacin (5 mg·kg-1), ibuprofen (30 mg·kg-1), or naproxen (30 mg·kg-1) inhibited dural-evoked firing within the trigeminocervical complex with different temporal profiles. Similarly, both indomethacin and naproxen inhibited L-glutamate-evoked cell firing suggesting a common action. By contrast, only indomethacin was able to inhibit NO-induced firing. The differences in profile of effect of indomethacin may be fundamental to its ability to treat paroxysmal hemicrania and hemicrania continua. The data implicate NO-related signaling as a potential therapeutic approach to these disorders.
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Affiliation(s)
- Oliver Summ
- Headache Group-Department of Neurology, University of California, San Francisco, San Francisco, CA, United States. Dr. Summ is now with the Department of Neurology and Research Center of Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany. Dr. Andreou is now with the Headache Research-Wolfson CARD, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom. Dr. Akerman is now with the Department of Neural and Pain Sciences, University of Maryland Baltimore, Baltimore, MD, United States
| | - Anna P. Andreou
- Headache Group-Department of Neurology, University of California, San Francisco, San Francisco, CA, United States. Dr. Summ is now with the Department of Neurology and Research Center of Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany. Dr. Andreou is now with the Headache Research-Wolfson CARD, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom. Dr. Akerman is now with the Department of Neural and Pain Sciences, University of Maryland Baltimore, Baltimore, MD, United States
| | - Simon Akerman
- Headache Group-Department of Neurology, University of California, San Francisco, San Francisco, CA, United States. Dr. Summ is now with the Department of Neurology and Research Center of Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany. Dr. Andreou is now with the Headache Research-Wolfson CARD, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom. Dr. Akerman is now with the Department of Neural and Pain Sciences, University of Maryland Baltimore, Baltimore, MD, United States
| | - Philip R. Holland
- Headache Group, Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Jan Hoffmann
- Headache Group, Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Peter J. Goadsby
- Headache Group-Department of Neurology, University of California, San Francisco, San Francisco, CA, United States. Dr. Summ is now with the Department of Neurology and Research Center of Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany. Dr. Andreou is now with the Headache Research-Wolfson CARD, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom. Dr. Akerman is now with the Department of Neural and Pain Sciences, University of Maryland Baltimore, Baltimore, MD, United States
- Headache Group, Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
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Sprouse Blum AS, Lavoie B, Haag M, Mawe SM, Tolner EA, van den Maagdenberg AMJM, Chen SP, Eikermann-Haerter K, Ptáček L, Mawe GM, Shapiro RE. No Gastrointestinal Dysmotility in Transgenic Mouse Models of Migraine. Headache 2019; 60:396-404. [PMID: 31876298 DOI: 10.1111/head.13724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To determine whether transgenic mouse models of migraine exhibit upper gastrointestinal dysmotility comparable to those observed in migraine patients. BACKGROUND There is considerable evidence supporting the comorbidity of gastrointestinal dysmotility and migraine. Gastrointestinal motility, however, has never been investigated in transgenic mouse models of migraine. METHODS Three transgenic mouse strains that express pathogenic gene mutations linked to monogenic migraine-relevant phenotypes were studied: CADASIL (Notch3-Tg88), FASP (CSNK1D-T44A), and FHM1 (CACNA1A-S218L). Upper gastrointestinal motility was quantified by measuring gastric emptying and small intestinal transit in mutant and control animals. Gastrointestinal motility was measured at baseline and after pretreatment with 10 mg/kg nitroglycerin (NTG). RESULTS No significant differences were observed for gastric emptying or small intestinal transit at baseline for any of the 3 transgenic strains when compared to appropriate controls or after pretreatment with NTG when compared to vehicle. CONCLUSIONS We detected no evidence of upper gastrointestinal dysmotility in mice that express mutations in genes linked to monogenic migraine-relevant phenotypes. Future studies seeking to understand why humans with migraine experience delayed gastric emptying may benefit from pursuing other modifiers of gastrointestinal motility, such as epigenetic or microbiome-related factors.
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Affiliation(s)
- Adam S Sprouse Blum
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
| | - Brigitte Lavoie
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
| | - Melody Haag
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
| | - Seamus M Mawe
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
| | - Else A Tolner
- Departments of Human Genetics & Neurology, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Shih-Pin Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | | | - Louis Ptáček
- Department of Neurology, Weill Neuroscience Institute, and Kavli Institute for Fundamental Neuroscience, University of California San Francisco, San Francisco, CA, USA
| | - Gary M Mawe
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
| | - Robert E Shapiro
- Department of Neurological Sciences, The University of Vermont, Burlington, VT, USA
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Abdolahi M, Jafarieh A, Sarraf P, Sedighiyan M, Yousefi A, Tafakhori A, Abdollahi H, Salehinia F, Djalali M. The Neuromodulatory Effects of ω-3 Fatty Acids and Nano-Curcumin on the COX-2/ iNOS Network in Migraines: A Clinical Trial Study from Gene Expression to Clinical Symptoms. Endocr Metab Immune Disord Drug Targets 2019; 19:874-884. [DOI: 10.2174/1871530319666190212170140] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/19/2018] [Accepted: 01/19/2019] [Indexed: 11/22/2022]
Abstract
Background:
Migraine is a common neuroinflammatory disorder characterized by recurrent
attacks of pain. Human and experimental models of migraine studies have demonstrated the role
played by COX-2/ iNOS in migraine’s neuroinflammatory pathogenesis. COX-2 and iNOS are closely
linked and both contribute to inflammation and neurogenic pain in the central nervous system. Omega-
3 fatty acids and curcumin, an active polyphenol of turmeric, have anti-inflammatory and neuroprotective
effects through several mechanisms, including the suppression of COX-2 and iNOS gene expression,
as well as their serum levels. The aim of the present study is to evaluate the nutrigenomic effects
of ω-3 fatty acids, nano-curcumin, and a combination of the two, on neuroinflammation and clinical
symptoms in migraine patients.
Methods:
This study reports the results of a clinical trial over a 2-month period, involving 74 episodic
migraine patients who received ω-3 fatty acids, nano-curcumin, a combination of them, or a placebo.
At the start and end of the study, the expression of COX-2/iNOS (in peripheral mononuclear blood
cells isolated from patients) and COX-2/iNOS serum levels were measured, using real-time PCR and
ELISA respectively. The frequency, severity and duration of pain attacks were also recorded.
Results:
The results of the present trial showed that ω-3 fatty acids and nano-curcumin can reinforce
each other’s effects in the downregulation of COX-2/iNOS mRNA, as well as reduce their serum levels.
In addition, the combination of ω-3 and nano-curcumin significantly reduced the frequency, severity
and duration of headaches (P<0.05).
Conclusion:
These findings indicate that combination therapy of ω-3 fatty acids and nano-curcumin
can be considered as a promising new approach in migraine prevention.
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Affiliation(s)
- Mina Abdolahi
- AmirAlam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Arash Jafarieh
- AmirAlam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Payam Sarraf
- Iranian Centre of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohsen Sedighiyan
- Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Abolghasem Yousefi
- AmirAlam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Tafakhori
- Iranian Centre of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Abdollahi
- AmirAlam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Farahnaz Salehinia
- AmirAlam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Djalali
- Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
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Demartini C, Greco R, Zanaboni AM, Sances G, De Icco R, Borsook D, Tassorelli C. Nitroglycerin as a comparative experimental model of migraine pain: From animal to human and back. Prog Neurobiol 2019; 177:15-32. [DOI: 10.1016/j.pneurobio.2019.02.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 01/19/2019] [Accepted: 02/10/2019] [Indexed: 12/13/2022]
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Nagy-Grócz G, Tar L, Bohár Z, Fejes-Szabó A, Laborc KF, Spekker E, Vécsei L, Párdutz Á. The modulatory effect of anandamide on nitroglycerin-induced sensitization in the trigeminal system of the rat. Cephalalgia 2015; 36:849-61. [PMID: 26512068 DOI: 10.1177/0333102415613766] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 09/18/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND One of the human and animal models of migraine is the systemic administration of the nitric oxide donor (NO) nitroglycerin (NTG). NO can provoke migraine-like attacks in migraineurs and initiates a self-amplifying process in the trigeminal system, probably leading to central sensitization. Recent studies suggest that the endocannabinoid system is involved in nociceptive signal processing and cannabinoid receptor (CB) agonists are able to attenuate nociception in animal models of pain. AIM The purpose of the present study was to investigate the modulatory effects of a CB agonist anandamide (AEA) on the NTG-induced expression of transient receptor potential vanilloid type 1 (TRPV1), neuronal nitric oxide synthase (nNOS), nuclear factor kappa B (NF-κB), cyclooxygenase-2 (COX-2) and kynurenine aminotransferase-II (KAT-II) in the upper cervical spinal cord (C1-C2) of the rat, where most of the trigeminal nociceptive afferents convey. METHODS A half hour before and one hour after NTG (10 mg/kg) or placebo injection, adult male Sprague-Dawley rats (n = 44) were treated with AEA (2 × 5 mg/kg). Four hours after placebo/NTG injection, the animals were perfused and the cervical spinal cords were removed for immunohistochemistry and Western blotting. RESULTS AND CONCLUSION Our results show that NTG is able to increase TRPV1, nNOS, NF-κB and COX-2 and decrease KAT-II expression in the C1-C2 segments. On the other hand, we have found that AEA modulates the NTG-induced changes, thus it influences the activation and central sensitization process in the trigeminal system, probably via CBs.
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Affiliation(s)
- Gábor Nagy-Grócz
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Lilla Tar
- Department of Neurology, University of Ulm, Germany
| | - Zsuzsanna Bohár
- MTA-SZTE Neuroscience Research Group, University of Szeged, Hungary
| | - Annamária Fejes-Szabó
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Klaudia Flóra Laborc
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - Eleonóra Spekker
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
| | - László Vécsei
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary MTA-SZTE Neuroscience Research Group, University of Szeged, Hungary
| | - Árpád Párdutz
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Hungary
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Role of phosphorylated extracellular signal-regulated kinase, calcitonin gene-related peptide and cyclooxygenase-2 in experimental rat models of migraine. Mol Med Rep 2015; 12:1803-9. [PMID: 25892078 PMCID: PMC4463979 DOI: 10.3892/mmr.2015.3616] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 02/05/2015] [Indexed: 01/05/2023] Open
Abstract
Although migraine is a common neurological condition, the pathomechanism is not yet fully understood. Activation of the trigeminovascular system (TVS) has an important function in this disorder and neurogenic inflammation and central sensitization are important mechanisms underlying this condition. Nitroglycerin (NTG) infusion in rats closely mimics a universally accepted human model of migraine. Electrical stimulation of the trigeminal ganglion (ESTG) of rats can also activate TVS during a migraine attack. Numerous studies have revealed that phosphorylated extracellular signal-regulated kinase (p-ERK), calcitonin gene-related peptide (CGRP) and cyclooxygenase-2 (COX-2) are involved in pain and nociceptive pathways. However, few studies have examined whether p-ERK, CGRP and COX-2 are involved in neurogenic inflammation and central sensitization. In the present study, the expression of p-ERK, CGRP and COX-2 was detected in the dura mater, trigeminal ganglion (TG) and spinal trigeminal nucleus caudalis in NTG-induced rats and ESTG models by immunohistochemistry. The three areas considered were crucial components of the TVS. The selective COX-2 inhibitor nimesulide was used in ESTG rats to examine the association between p-ERK, CGRP and COX-2. The results demonstrated that p-ERK, CGRP and COX-2 mediated neurogenic inflammation and central sensitization in migraine. In addition, the expression of p-ERK and CGRP was attenuated by the COX-2 inhibitor.
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Erdener SE, Dalkara T. Modelling headache and migraine and its pharmacological manipulation. Br J Pharmacol 2014; 171:4575-94. [PMID: 24611635 DOI: 10.1111/bph.12651] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/13/2014] [Accepted: 02/14/2014] [Indexed: 12/22/2022] Open
Abstract
Similarities between laboratory animals and humans in anatomy and physiology of the cephalic nociceptive pathways have allowed scientists to create successful models that have significantly contributed to our understanding of headache. They have also been instrumental in the development of novel anti-migraine drugs different from classical pain killers. Nevertheless, modelling the mechanisms underlying primary headache disorders like migraine has been challenging due to limitations in testing the postulated hypotheses in humans. Recent developments in imaging techniques have begun to fill this translational gap. The unambiguous demonstration of cortical spreading depolarization (CSD) during migraine aura in patients has reawakened interest in studying CSD in animals as a noxious brain event that can activate the trigeminovascular system. CSD-based models, including transgenics and optogenetics, may more realistically simulate pain generation in migraine, which is thought to originate within the brain. The realization that behavioural correlates of headache and migrainous symptoms like photophobia can be assessed quantitatively in laboratory animals, has created an opportunity to directly study the headache in intact animals without the confounding effects of anaesthetics. Headache and migraine-like episodes induced by administration of glyceryltrinitrate and CGRP to humans and parallel behavioural and biological changes observed in rodents create interesting possibilities for translational research. Not unexpectedly, species differences and model-specific observations have also led to controversies as well as disappointments in clinical trials, which, in return, has helped us improve the models and advance our understanding of headache. Here, we review commonly used headache and migraine models with an emphasis on recent developments.
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Affiliation(s)
- S E Erdener
- Department of Neurology, Faculty of Medicine, Institute of Neurological Sciences and Psychiatry, Hacettepe University, Ankara, Turkey
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Summ O, Andreou AP, Akerman S, Goadsby PJ. A potential nitrergic mechanism of action for indomethacin, but not of other COX inhibitors: relevance to indomethacin-sensitive headaches. J Headache Pain 2010; 11:477-83. [PMID: 20978816 PMCID: PMC2995862 DOI: 10.1007/s10194-010-0263-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 09/01/2010] [Indexed: 11/29/2022] Open
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) that act as cyclo-oxygenase (COX) inhibitors are commonly used in the treatment of a range of headache disorders, although their mechanism of action is unclear. Indomethacin is of particular interest given its very special effect in some primary headaches. Here the in vivo technique of intravital microscopy in rats has been utilised as a model of trigeminovascular nociception to study the potential mechanism of action of indomethacin. Dural vascular changes were produced using electrical (neurogenic) dural vasodilation (NDV), calcitonin gene-related peptide (CGRP) induced dural vasodilation and nitric oxide (NO) induced dural vasodilation using NO donors. In each of these settings the effect of intravenously administered indomethacin (5 mg kg(-1)), naproxen (30 mg kg(-1)) and ibuprofen (30 mg kg(-1)) was tested. All of the tested drugs significantly inhibited NDV (between 30 and 52%). Whilst none of them was able to inhibit CGRP-induced dural vasodilation, only indomethacin reduced NO induced dural vasodilation (35 ± 7%, 10 min post administration). We conclude NSAIDs inhibit release of CGRP after NDV without an effect on CGRP directly. Further we describe a differentiating effect of indomethacin inhibiting nitric oxide induced dural vasodilation that is potentially relevant to understanding its unique action in disorders such as paroxysmal hemicrania and hemicrania continua.
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Affiliation(s)
- Oliver Summ
- Headache Group, Department of Neurology, University of California, 1701 Divisadero St, Suite 480, San Francisco, CA 94115, USA
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Pardutz A, Schoenen J. NSAIDs in the Acute Treatment of Migraine: A Review of Clinical and Experimental Data. Pharmaceuticals (Basel) 2010; 3:1966-1987. [PMID: 27713337 PMCID: PMC4033962 DOI: 10.3390/ph3061966] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 05/18/2010] [Accepted: 06/11/2010] [Indexed: 11/25/2022] Open
Abstract
Migraine is a common disabling neurological disorder with a serious socio-economical burden. By blocking cyclooxygenase nonsteroidal anti-inflammatory drugs (NSAIDs) decrease the synthesis of prostaglandins, which are involved in the pathophysiology of migraine headaches. Despite the introduction more than a decade ago of a new class of migraine-specific drugs with superior efficacy, the triptans, NSAIDs remain the most commonly used therapies for the migraine attack. This is in part due to their wide availability as over-the-counter drugs and their pharmaco-economic advantages, but also to a favorable efficacy/side effect profile at least in attacks of mild and moderate intensity. We summarize here both the experimental data showing that NSAIDs are able to influence several pathophysiological facets of the migraine headache and the clinical studies providing evidence for the therapeutic efficacy of various subclasses of NSAIDs in migraine therapy. Taken together these data indicate that there are several targets for NSAIDs in migraine pathophysiology and that on the spectrum of clinical potency acetaminophen is at the lower end while ibuprofen is among the most effective drugs. Acetaminophen and aspirin excluded, comparative trials between the other NSAIDs are missing. Since evidence-based criteria are scarce, the selection of an NSAID should take into account proof and degree of efficacy, rapid GI absorption, gastric ulcer risk and previous experience of each individual patient. If selected and prescribed wisely, NSAIDs are precious, safe and cost-efficient drugs for the treatment of migraine attacks.
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Affiliation(s)
- Arpad Pardutz
- Department of Neurology, University of Szeged, Semmelweis u. 6. Szeged, Hungary H-6720, Hungary.
| | - Jean Schoenen
- Headache Research Unit, Department of Neurology & GIGA Neurosciences, Liège University, CHU-Sart Tilman, T4(+1), B36, B-4000 Liège, Belgium.
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Yin Z, Fang Y, Ren L, Wang X, Zhang A, Lin J, Li X. Atorvastatin attenuates NF-κB activation in trigeminal nucleus caudalis in a rat model of migraine. Neurosci Lett 2009; 465:61-5. [DOI: 10.1016/j.neulet.2009.08.081] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 08/18/2009] [Accepted: 08/29/2009] [Indexed: 11/28/2022]
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Tfelt-Hansen P, Daugaard D, Lassen LH, Iversen HK, Olesen J. Prednisolone reduces nitric oxide-induced migraine. Eur J Neurol 2009; 16:1106-11. [DOI: 10.1111/j.1468-1331.2009.02654.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Vamos E, Pardutz A, Fejes A, Tajti J, Toldi J, Vecsei L. Modulatory effects of probenecid on the nitroglycerin-induced changes in the rat caudal trigeminal nucleus. Eur J Pharmacol 2009; 621:33-7. [PMID: 19744475 DOI: 10.1016/j.ejphar.2009.08.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 08/14/2009] [Accepted: 08/25/2009] [Indexed: 11/30/2022]
Abstract
Four hours after systemic administration of the nitric oxide donor nitroglycerin (10 mg/kg bodyweight, s.c.), the neurons of the rat caudal trigeminal nucleus are activated, the area covered by calcitonin gene-related peptide (CGRP)-immunoreactive fibres is decreased and the neuronal nitric oxide synthase (nNOS)- and the calmodulin-dependent protein kinase II alpha (CamKIIalpha)-immunopositive neurons in the same area are increased. Probenecid is a non-selective inhibitor of multidrug-resistance associated proteins and organic anion transporters thus it can modulate the transport functions in the central nervous system influencing nociception. Accordingly, the aim of the present experiments was to examine the effects of probenecid administration on the nitroglycerin-induced expressions of nNOS, CamKIIalpha and CGRP in the rat caudal trigeminal nucleus. Probenecid (200 mg/kg bodyweight, i.p.) pretreatment proved to mitigate the nitroglycerin-induced changes in expression in the rat caudal trigeminal nucleus. The data suggest that the changes caused by nitroglycerin in the expressions of CGRP, nNOS and CamKIIalpha can be influenced by probenecid modulating the inflammatory functions in the nervous system. These data may be of relevance for the pathogenesis of migraine headache.
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Affiliation(s)
- Eniko Vamos
- Department of Neurology, Albert Szent-Györgyi Clinical Centre, University of Szeged, Szeged, Hungary
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Doganay H, Akcali D, Goktaş T, Caglar K, Erbas D, Saydam C, Bolay H. African dust-laden atmospheric conditions activate the trigeminovascular system. Cephalalgia 2009; 29:1059-68. [PMID: 19735534 DOI: 10.1111/j.1468-2982.2008.01839.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
It has been recently noticed that dust originating from deserts can be transported to other continents by the atmosphere and has an adverse effect on public health, such as increased asthma attacks. Dust originating from the Saharan Desert could initiate a series of reactions upon contact with cloud water and results in the formation of reduced iron (Fe(2+)), oxalate and various basic amino acids. We aimed to evaluate whether the simulation of Saharan dust-containing atmospheric conditions could trigger the trigeminovascular system. Freely moving rats incubated within simulated atmospheric conditions containing (i) Saharan dust, (ii) Co(60) gamma ray-treated Saharan dust (sterilized) and (iii) dust-free air, were investigated for the presence of c-fos expression in trigeminal nucleus caudalis (TNC) and for NOx (nitrate+nitrite) levels in blood samples. Atmospheric samples were analysed for microorganisms. Saharan dust-containing atmospheric conditions induced c-fos expression in nociceptive neurons within TNC. The number of c-fos+ neurons in superficial lamina of TNC was significantly higher in the Saharan dust group (32.9 +/- 5.3, P = 0.0001) compared with dust-free air (11.02 +/- 2.7) or Co(60)-treated Saharan dust groups (15.01 +/- 2.4). An increase in NOx levels was detected in blood samples of rats exposed to Saharan dust-containing atmosphere. This study has revealed an unknown environmental factor as a possible trigger for headache. It is the first time that transport of Saharan dust with the atmospheric air stream has been documented to be able to trigger the trigeminovascular system in animals. Further studies are needed to explore the mechanisms and molecules that mediate the nociceptive effect and to guide new treatment strategies.
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Affiliation(s)
- H Doganay
- Neuropsychiatry Centre & Department of Neurology, Gazi University, Ankara 06510, Turkey
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Varga H, Pardutz A, Vamos E, Bohar Z, Bago F, Tajti J, Bari F, Vecsei L. Selective inhibition of cyclooxygenase-2 attenuates nitroglycerin-induced calmodulin-dependent protein kinase II alpha in rat trigeminal nucleus caudalis. Neurosci Lett 2009; 451:170-3. [DOI: 10.1016/j.neulet.2008.12.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 12/18/2008] [Accepted: 12/18/2008] [Indexed: 11/25/2022]
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