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Abstract
Pain is a significant public health problem, and assessment of pain-related impairment of behavior is a key clinical indicator and treatment target. Similar to opioids and NSAIDs, dopamine (DA) transporter inhibitors block pain-related depression of intracranial self-stimulation (ICSS) in rats. The primary goal of the present study was to determine if the effects of monoamine uptake inhibitors on pain-related depression of ICSS in rats extend to an assay of pain-related depression of nesting in mice. We hypothesized that the DA transporter-selective uptake inhibitor bupropion would block depression of nesting behavior produced by intraperitoneal injection of lactic acid, whereas selective serotonin transporter-selective citalopram, norepinephrine transporter-selective nisoxetine, and the mixed action selective serotonin transporter/norepinephrine transporter inhibitor milnacipran would be ineffective. Effects of the NSAID ketoprofen were also obtained to facilitate interpretation of the effects of the monoamine uptake inhibitors. Consistent with previous findings, ketoprofen blocked pain-related depression of nesting. In contrast, none of the monoamine uptake inhibitors blocked pain-related depression of nesting, although they all blocked pain-related stimulation of stretching. Unlike findings from studies of pain-related depression of ICSS, these results do not support consideration of DA uptake inhibitors for treatment of pain-related depression of behavior.
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102
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Rajchgot T, Thomas SC, Wang JC, Ahmadi M, Balood M, Crosson T, Dias JP, Couture R, Claing A, Talbot S. Neurons and Microglia; A Sickly-Sweet Duo in Diabetic Pain Neuropathy. Front Neurosci 2019; 13:25. [PMID: 30766472 PMCID: PMC6365454 DOI: 10.3389/fnins.2019.00025] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 01/11/2019] [Indexed: 12/11/2022] Open
Abstract
Diabetes is a common condition characterized by persistent hyperglycemia. High blood sugar primarily affects cells that have a limited capacity to regulate their glucose intake. These cells include capillary endothelial cells in the retina, mesangial cells in the renal glomerulus, Schwann cells, and neurons of the peripheral and central nervous systems. As a result, hyperglycemia leads to largely intractable complications such as retinopathy, nephropathy, hypertension, and neuropathy. Diabetic pain neuropathy is a complex and multifactorial disease that has been associated with poor glycemic control, longer diabetes duration, hypertension, advanced age, smoking status, hypoinsulinemia, and dyslipidemia. While many of the driving factors involved in diabetic pain are still being investigated, they can be broadly classified as either neuron -intrinsic or -extrinsic. In neurons, hyperglycemia impairs the polyol pathway, leading to an overproduction of reactive oxygen species and reactive nitrogen species, an enhanced formation of advanced glycation end products, and a disruption in Na+/K+ ATPase pump function. In terms of the extrinsic pathway, hyperglycemia leads to the generation of both overactive microglia and microangiopathy. The former incites a feed-forward inflammatory loop that hypersensitizes nociceptor neurons, as observed at the onset of diabetic pain neuropathy. The latter reduces neurons' access to oxygen, glucose and nutrients, prompting reductions in nociceptor terminal expression and losses in sensation, as observed in the later stages of diabetic pain neuropathy. Overall, microglia can be seen as potent and long-lasting amplifiers of nociceptor neuron activity, and may therefore constitute a potential therapeutic target in the treatment of diabetic pain neuropathy.
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Affiliation(s)
- Trevor Rajchgot
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Sini Christine Thomas
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Jo-Chiao Wang
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Maryam Ahmadi
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Mohammad Balood
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Théo Crosson
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Jenny Pena Dias
- Johns Hopkins University School of Medicine, Division of Endocrinology, Diabetes and Metabolism, Baltimore, MD, United States
| | - Réjean Couture
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Audrey Claing
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Sébastien Talbot
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
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103
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Li C, Liu S, Lu X, Tao F. Role of Descending Dopaminergic Pathways in Pain Modulation. Curr Neuropharmacol 2019; 17:1176-1182. [PMID: 31182003 PMCID: PMC7057207 DOI: 10.2174/1570159x17666190430102531] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 03/19/2019] [Accepted: 04/11/2019] [Indexed: 12/24/2022] Open
Abstract
Pain, especially when chronic, is a common reason patients seek medical care and it affects the quality of life and well-being of the patients. Unfortunately, currently available therapies for chronic pain are often inadequate because the neurobiological basis of such pain is still not fully understood. Although dopamine has been known as a neurotransmitter to mediate reward and motivation, accumulating evidence has shown that dopamine systems in the brain are also involved in the central regulation of chronic pain. Most importantly, descending dopaminergic pathways play an important role in pain modulation. In this review, we discuss dopamine receptors, dopaminergic systems in the brain, and the role of descending dopaminergic pathways in the modulation of different types of pain.
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Affiliation(s)
| | | | - Xihua Lu
- Address correspondence to these authors at the Feng Tao, 3302 Gaston Ave., Dallas, TX 75246, USA; Tel: 1-214-828-8272; E-mail: and Xihua Lu, 127 Dongming Road,Zhengzhou, Henan 450008, China; Tel: 86-371-6558-7320; E-mail:
| | - Feng Tao
- Address correspondence to these authors at the Feng Tao, 3302 Gaston Ave., Dallas, TX 75246, USA; Tel: 1-214-828-8272; E-mail: and Xihua Lu, 127 Dongming Road,Zhengzhou, Henan 450008, China; Tel: 86-371-6558-7320; E-mail:
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104
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Cisewski DH, Motov SM. Essential pharmacologic options for acute pain management in the emergency setting. Turk J Emerg Med 2019; 19:1-11. [PMID: 30793058 PMCID: PMC6370909 DOI: 10.1016/j.tjem.2018.11.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 11/30/2018] [Indexed: 12/19/2022] Open
Abstract
Pain is the root cause for the overwhelming majority of emergency department (ED) visits worldwide. However, pain is often undertreated due to inappropriate analgesic dosing and ineffective utilization of available analgesics. It is essential for emergency providers to understand the analgesic armamentarium at their disposal and how it can be used safely and effectively to treat pain of every proportion within the emergency setting. A 'balanced analgesia' regimen may be used to treat pain while reducing the overall pharmacologic side effect profile of the combined analgesics. Channels-Enzymes-Receptors Targeted Analgesia (CERTA) is a multimodal analgesic strategy incorporating balanced analgesia by shifting from a system-based to a mechanistic-based approach to pain management that targets the physiologic pathways involved in pain signaling transmission. Targeting individual pain pathways allows for a variety of reduced-dose pharmacologic options - both opioid and non-opioid - to be used in a stepwise progression of analgesic strength as pain advances up the severity scale. By developing a familiarity with the various analgesic options at their disposal, emergency providers may formulate safe, effective, balanced analgesic combinations unique to each emergency pain presentation.
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Affiliation(s)
- David H. Cisewski
- Icahn School of Medicine at Mount Sinai Hospital, Department of Emergency Medicine, New York, NY, USA
| | - Sergey M. Motov
- Maimonides Medical Center, Department of Emergency Medicine, Brooklyn, NY, USA
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105
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Albrecht DS, Forsberg A, Sandstrom A, Bergan C, Kadetoff D, Protsenko E, Lampa J, Lee YC, Olgart Höglund C, Catana C, Cervenka S, Akeju O, Lekander M, Cohen G, Halldin C, Taylor N, Kim M, Hooker JM, Edwards RR, Napadow V, Kosek E, Loggia ML. Brain glial activation in fibromyalgia - A multi-site positron emission tomography investigation. Brain Behav Immun 2019; 75:72-83. [PMID: 30223011 PMCID: PMC6541932 DOI: 10.1016/j.bbi.2018.09.018] [Citation(s) in RCA: 171] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/31/2018] [Accepted: 09/13/2018] [Indexed: 12/11/2022] Open
Abstract
Fibromyalgia (FM) is a poorly understood chronic condition characterized by widespread musculoskeletal pain, fatigue, and cognitive difficulties. While mounting evidence suggests a role for neuroinflammation, no study has directly provided evidence of brain glial activation in FM. In this study, we conducted a Positron Emission Tomography (PET) study using [11C]PBR28, which binds to the translocator protein (TSPO), a protein upregulated in activated microglia and astrocytes. To enhance statistical power and generalizability, we combined datasets collected independently at two separate institutions (Massachusetts General Hospital [MGH] and Karolinska Institutet [KI]). In an attempt to disentangle the contributions of different glial cell types to FM, a smaller sample was scanned at KI with [11C]-L-deprenyl-D2 PET, thought to primarily reflect astrocytic (but not microglial) signal. Thirty-one FM patients and 27 healthy controls (HC) were examined using [11C]PBR28 PET. 11 FM patients and 11 HC were scanned using [11C]-L-deprenyl-D2 PET. Standardized uptake values normalized by occipital cortex signal (SUVR) and distribution volume (VT) were computed from the [11C]PBR28 data. [11C]-L-deprenyl-D2 was quantified using λ k3. PET imaging metrics were compared across groups, and when differing across groups, against clinical variables. Compared to HC, FM patients demonstrated widespread cortical elevations, and no decreases, in [11C]PBR28 VT and SUVR, most pronounced in the medial and lateral walls of the frontal and parietal lobes. No regions showed significant group differences in [11C]-L-deprenyl-D2 signal, including those demonstrating elevated [11C]PBR28 signal in patients (p's ≥ 0.53, uncorrected). The elevations in [11C]PBR28 VT and SUVR were correlated both spatially (i.e., were observed in overlapping regions) and, in several areas, also in terms of magnitude. In exploratory, uncorrected analyses, higher subjective ratings of fatigue in FM patients were associated with higher [11C]PBR28 SUVR in the anterior and posterior middle cingulate cortices (p's < 0.03). SUVR was not significantly associated with any other clinical variable. Our work provides the first in vivo evidence supporting a role for glial activation in FM pathophysiology. Given that the elevations in [11C]PBR28 signal were not also accompanied by increased [11C]-L-deprenyl-D2 signal, our data suggests that microglia, but not astrocytes, may be driving the TSPO elevation in these regions. Although [11C]-L-deprenyl-D2 signal was not found to be increased in FM patients, larger studies are needed to further assess the role of possible astrocytic contributions in FM. Overall, our data support glial modulation as a potential therapeutic strategy for FM.
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Affiliation(s)
- Daniel S. Albrecht
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Anton Forsberg
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet, and Stockholm County Council, SE-171 76 Stockholm, Sweden.
| | - Angelica Sandstrom
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden,Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
| | - Courtney Bergan
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Diana Kadetoff
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden; Stockholm Spine Center, Stockholm, Sweden.
| | - Ekaterina Protsenko
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| | - Jon Lampa
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.
| | - Yvonne C. Lee
- Division of Rheumatology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States,Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | | | - Ciprian Catana
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| | - Simon Cervenka
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet, and Stockholm County Council, SE-171 76 Stockholm, Sweden.
| | - Oluwaseun Akeju
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| | - Mats Lekander
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden; Stress Research Institute, Stockholm University, Stockholm, Sweden.
| | - George Cohen
- Department of Rheumatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| | - Christer Halldin
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet, and Stockholm County Council, SE-171 76 Stockholm, Sweden.
| | - Norman Taylor
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| | | | | | | | - Vitaly Napadow
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States; Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States.
| | - Eva Kosek
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden; Stockholm Spine Center, Stockholm, Sweden.
| | - Marco L. Loggia
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
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106
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Mlost J, Wąsik A, Michaluk JT, Antkiewicz-Michaluk L, Starowicz K. Changes in Monoaminergic Neurotransmission in an Animal Model of Osteoarthritis: The Role of Endocannabinoid Signaling. Front Mol Neurosci 2018; 11:466. [PMID: 30618615 PMCID: PMC6306412 DOI: 10.3389/fnmol.2018.00466] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/03/2018] [Indexed: 12/18/2022] Open
Abstract
Chronic pain is a main symptom of osteoarthritis (OA). Moreover, a high percentage of OA patients suffer from mental health problems. The endocannabinoid (EC) system has attracted attention as an emerging drug target for pain treatment together with its activity on the mesolimbic reward system. Understanding the circuits that govern the reward of pain relief is crucial for the search for effective analgesics. Therefore, we investigated the role of the EC system on dopamine (DA) and noradrenaline (NA) in an animal model of OA-related chronic pain. OA rats exhibited significant decreases in DA metabolism in the nucleus accumbens (NAc), striatum (STR) and hippocampus (HC). NA metabolism was also significantly decreased by chronic pain in OA rats; however, this disruption was limited to the frontal cortex (FCx) and HC. URB597 (an inhibitor of EC metabolism) treatment completely reversed the decreased DA metabolism, especially in the brain reward system and the HC. Furthermore, administration of URB597 normalized the impairment of NA activity in the HC but potentiated the decreased NA levels in the FCx. Our results demonstrated that chronic pain in OA rats was reflected by the inhibition of mesolimbic and mesocortical dopaminergic transmission, and may indicate the pro-pain role of NA in the FCx. The data provide understanding about changes in neurotransmission in chronic pain states and may explain the clinical improvement in perceived life quality following cannabinoid treatment. Additional mechanistic studies in preclinical models examining the intersection between chronic pain and reward circuits may offer new approaches for improving pain therapy.
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Affiliation(s)
- Jakub Mlost
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Agnieszka Wąsik
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Jerzy Tadeusz Michaluk
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | | | - Katarzyna Starowicz
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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107
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Sokolov AY, Popova NS, Povarenkov AS, Amelin AV. The Role of Dopamine in Primary Headaches. NEUROCHEM J+ 2018. [DOI: 10.1134/s1819712418030145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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108
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109
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Psychological Processes in Chronic Pain: Influences of Reward and Fear Learning as Key Mechanisms – Behavioral Evidence, Neural Circuits, and Maladaptive Changes. Neuroscience 2018; 387:72-84. [DOI: 10.1016/j.neuroscience.2017.08.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 08/22/2017] [Accepted: 08/29/2017] [Indexed: 01/09/2023]
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110
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Presynaptic Inhibition of Primary Nociceptive Signals to Dorsal Horn Lamina I Neurons by Dopamine. J Neurosci 2018; 38:8809-8821. [PMID: 30143577 DOI: 10.1523/jneurosci.0323-18.2018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/18/2018] [Accepted: 08/09/2018] [Indexed: 01/10/2023] Open
Abstract
The dorsal horn of the spinal cord represents the first relay station in the pain pathway where primary nociceptive inputs are modulated by local circuits and by descending signals before being relayed to supraspinal nuclei. To determine whether dopamine can modulate primary nociceptive Aδ- and C-fiber signals, the effects of dopamine were tested on the excitatory postsynaptic currents (EPSCs) recorded from large lamina I neurons and from retrograde-labeled spinoparabrachial lamina I neurons upon stimulation of the L4/L5 dorsal root in horizontal spinal cord slices in vitro Dopamine inhibited the EPSCs in a dose-dependent manner, with substantial inhibition (33%) at 1 μm and maximum inhibition (∼70%) at 10-20 μm Dopamine reduced the frequency of miniature EPSCs recorded from large lamina I neurons, increased the paired pulse depression ratio of paired EPSCs, and induced similar inhibition of EPSCs after dialysis of large lamina I neurons with GDP-β-S, consistent with actions at presynaptic sites. Pharmacological experiments suggested that the inhibitory effects of dopamine were largely mediated by D4 receptors (53%). Similar inhibition (66%) by dopamine was observed on EPSCs recorded from ipsilateral large lamina I neurons 6 d after injection of complete Freund's adjuvant in the hindpaw, suggesting that dopamine downregulates primary nociceptive inputs to lamina I neurons during chronic inflammatory pain. We propose that presynaptic inhibition of primary nociceptive inputs to lamina I projection neurons is a mechanism whereby dopamine can inhibit incoming noxious stimuli to the dorsal horn of the spinal cord.SIGNIFICANCE STATEMENT Lamina I projection neurons represent the main output for the pain signals from the dorsal horn of the spinal cord to brainstem and thalamic nuclei. We found that dopamine inhibits the nociceptive Aδ- and C-fiber synaptic inputs to lamina I projection neurons via presynaptic actions. Similar inhibitory effects of dopamine on the EPSCs were observed in rats subjected to complete Freund's adjuvant to induce peripheral inflammation, suggesting that dopamine inhibits the synaptic inputs to lamina I neurons in the setting of injury. A better understanding of how primary nociceptive inputs to the dorsal horn of the spinal cord are modulated by descending monoaminergic signals may help in the development of new pharmacological strategies to selectively downregulate the output from lamina I projection neurons.
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111
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Martikainen IK, Hagelberg N, Jääskeläinen SK, Hietala J, Pertovaara A. Dopaminergic and serotonergic mechanisms in the modulation of pain: In vivo studies in human brain. Eur J Pharmacol 2018; 834:337-345. [PMID: 30036531 DOI: 10.1016/j.ejphar.2018.07.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/18/2018] [Accepted: 07/19/2018] [Indexed: 12/16/2022]
Abstract
Here we review the literature assessing the roles of the brain dopaminergic and serotonergic systems in the modulation of pain as revealed by in vivo human studies using positron emission tomography. In healthy subjects, dopamine D2/D3 receptor availability particularly in the striatum and serotonin 5-HT1A and 5-HT2A receptor availabilities in the cortex predict the subject's response to tonic experimental pain. High availability of dopamine D2/D3 or serotonin 5-HT2A receptors is associated with high pain intensity, whereas high availability of 5-HT1A receptors associates with low pain intensity. Chronic neuropathic pain is associated with high striatal dopamine D2/D3 receptor availability, for which low endogenous dopamine tone is a plausible explanation, although a compensatory increase in striatal dopamine D2/D3 receptor density may also contribute. In contrast, chronic musculoskeletal pain is associated with low baseline availability of striatal dopamine D2/D3 receptors. In healthy subjects, brain serotonin 5-HT1A as well as dopamine D2/D3 receptor availabilities associate with the subject's response criterion rather than the capacity to discriminate painful thermal stimuli suggesting that these neurotransmitter systems act mainly on non-sensory rather than sensory factors of thermally induced pain experience. Additionally, 5-HT1A receptor availability predicts the subject's discriminative ability but not response criterion for non-painful tactile test stimuli, while no such correlation is observed with dopamine D2/D3 receptors. These findings suggest that dopamine acting on striatal dopamine D2/D3 receptors and serotonin acting on cortical 5-HT1A and 5-HT2A receptors contribute to top-down pain regulation in humans.
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Affiliation(s)
- Ilkka K Martikainen
- Department of Physiology, Institute of Biomedicine, University of Turku, 20520 Turku, Finland; Medical Imaging Center, Department of Radiology, Tampere University Hospital, 33521 Tampere, Finland
| | - Nora Hagelberg
- Department of Anesthesiology and Intensive Care, Turku University Central Hospital and University of Turku, 20520 Turku, Finland; Turku PET Centre, Turku University Central Hospital and University of Turku, 20520 Turku, Finland
| | - Satu K Jääskeläinen
- Department of Clinical Neurophysiology, Turku University Central Hospital and University of Turku, 20520 Turku, Finland
| | - Jarmo Hietala
- Turku PET Centre, Turku University Central Hospital and University of Turku, 20520 Turku, Finland; Department of Psychiatry, Turku University Central Hospital and University of Turku, 20520 Turku, Finland
| | - Antti Pertovaara
- Department of Physiology, Institute of Biomedicine, University of Turku, 20520 Turku, Finland; Department of Physiology, Faculty of Medicine, University of Helsinki, 00014 Helsinki, Finland.
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112
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Gainfully employing descending controls in acute and chronic pain management. Vet J 2018; 237:16-25. [DOI: 10.1016/j.tvjl.2018.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 12/30/2022]
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113
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Gamal-Eltrabily M, Manzano-García A. Role of central oxytocin and dopamine systems in nociception and their possible interactions: suggested hypotheses. Rev Neurosci 2018; 29:377-386. [DOI: 10.1515/revneuro-2017-0068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 09/16/2017] [Indexed: 12/17/2022]
Abstract
AbstractCentral oxytocin and dopamine have an important role in the process of nociception at the spinal level as well as supraspinal structures, e.g. anterior cingulate cortex, insular cortex, amygdala, nucleus accumbens, and hypothalamus. Many studies have pointed out the importance of both systems in the pain descending modulatory system and in pain-related symptoms in some chronic disorders, e.g. Parkinson disease and fibromyalgia. The interaction between oxytocin and dopamine systems has been addressed in some motivational behaviors, e.g. maternal and sexual behaviors, pair bonding, and salience. In this aspect, we propose that an oxytocin-dopamine interaction could be present in nociception, and we also explain the possible hypotheses of such an interaction between these systems.
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114
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The effects of a dopamine agonist (apomorphine) on experimental and spontaneous pain in patients with chronic radicular pain: A randomized, double-blind, placebo-controlled, cross-over study. PLoS One 2018; 13:e0195287. [PMID: 29621293 PMCID: PMC5886417 DOI: 10.1371/journal.pone.0195287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 02/15/2018] [Indexed: 11/29/2022] Open
Abstract
Background Although evidence suggests that dopaminergic systems are involved in pain processing, the effects of dopaminergic interventions on pain remains questionable. This randomized, double blinded, placebo-controlled, cross-over study was aimed at exploring the effect of the dopamine agonist apomorphine on experimental pain evoked by cold stimulation and on spontaneous pain in patients with lumbar radicular (neuropathic) pain. Methods Data was collected from 35 patients with chronic lumbar radiculopathy (18 men, mean age 56.2±13 years). The following parameters were evaluated before (baseline) and 30, 75 and 120 minutes subsequent to a subcutaneous injection of 1.5 mg apomorphine or placebo: cold pain threshold and tolerance in the painful site (ice pack, affected leg) and in a remote non-painful site (12°C water bath, hand), and spontaneous (affected leg) pain intensity (NPS, 0–100). Results One-hundred and twenty minutes following apomorphine (but not placebo) injection, cold pain threshold and tolerance in the hand increased significantly compared to baseline (from a median of 8.0 seconds (IQR = 5.0) to 10 seconds (IQR = 9.0), p = 0.001 and from a median of 19.5 seconds (IQR = 30.2) to 27.0 seconds (IQR = 37.5), p<0.001, respectively). In addition, apomorphine prolonged cold pain tolerance but not threshold in the painful site (from a median of 43.0 seconds (IQR = 63.0) at baseline to 51.0 seconds (IQR = 78.0) at 120 min, p = 0.02). Apomorphine demonstrated no superiority over placebo in reducing spontaneous pain intensity. Conclusion These findings are in line with previous results in healthy subjects, showing that apomorphine increases the ability to tolerate cold pain and therefore suggesting that dopaminergic interventions can have potential clinical relevance.
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115
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Siemian JN, Jia S, Liu JF, Zhang Y, Li JX. Neuroanatomical characterization of imidazoline I 2 receptor agonist-induced antinociception. Eur J Neurosci 2018. [PMID: 29514408 DOI: 10.1111/ejn.13899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chronic pain is a significant public health problem with a lack of safe and effective analgesics. The imidazoline I2 receptor (I2 R) is a promising analgesic target, but the neuroanatomical structures involved in mediating I2 R-associated behaviors are unknown. I2 Rs are enriched in the arcuate nucleus, dorsal raphe (DR), interpeduncular nucleus, lateral mammillary body, medial habenula, nucleus accumbens (NAc) and paraventricular nucleus; thus, this study investigated the antinociceptive and hypothermic effects of microinjections of the I2 R agonist 2-(2-benzofuranyl)-2-imidazoline hydrochloride (2-BFI). In rats, intra-DR microinjections produced antinociception in complete Freund's adjuvant- and chronic constriction injury-induced pain models. Intra-NAc microinjections produced antinociception and increased noxious stimulus-associated side time in a place escape/avoidance paradigm. Intra-NAc pretreatment with the I2 R antagonist idazoxan but not the D1 receptor antagonist SCH23390 or the D2 receptor antagonist raclopride attenuated intra-NAc 2-BFI-induced antinociception. Intra-NAc idazoxan did not attenuate systemically administered 2-BFI-induced antinociception. Microinjections into the other regions did not produce antinociception, and in none of the regions produced hypothermia. These data suggest that I2 R activation in some but not all I2 R-enriched brain regions is sufficient to produce antinociception and supports the theory that different I2 R-associated effects are mediated via distinct receptor populations, which may in turn be distributed differentially throughout the CNS.
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Affiliation(s)
- Justin N Siemian
- Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, The State University of New York, University at Buffalo, 102 Farber Hall, 3435 Main St., Buffalo, NY, 14214, USA
| | - Shushan Jia
- Department of Anesthesiology, Yantai Affiliated Hospital, Binzhou Medical University, Yantai, China
| | - Jian-Feng Liu
- Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, The State University of New York, University at Buffalo, 102 Farber Hall, 3435 Main St., Buffalo, NY, 14214, USA
| | - Yanan Zhang
- Research Triangle Institute, Research Triangle Park, NC, USA
| | - Jun-Xu Li
- Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, The State University of New York, University at Buffalo, 102 Farber Hall, 3435 Main St., Buffalo, NY, 14214, USA
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Lanza G, Cantone M, Aricò D, Lanuzza B, Cosentino FII, Paci D, Papotto M, Pennisi M, Bella R, Pennisi G, Paulus W, Ferri R. Clinical and electrophysiological impact of repetitive low-frequency transcranial magnetic stimulation on the sensory-motor network in patients with restless legs syndrome. Ther Adv Neurol Disord 2018. [PMID: 29511386 DOI: 10.1177/1756285618759973.] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Background Based on the hyperexcitability and disinhibition observed in patients with restless legs syndrome (RLS) following transcranial magnetic stimulation (TMS), we conducted a study with low-frequency repetitive TMS (rTMS) over the primary motor (M1) and somatosensory cortical areas (S1) in patients with RLS. Methods A total of 13 right-handed patients and 10 age-matched controls were studied using clinical scales and TMS. Measurements included resting motor threshold (rMT), motor-evoked potentials (MEPs), cortical silent period (CSP), and central motor conduction time (CMCT). A single evening session of rTMS (1 Hz, 20 trains, 50 stimuli each) was administered over the left M1, left S1, and sham stimulation over M1 in a random order. Clinical and TMS measures were repeated after each stimulation modality. Results Baseline CSP was shorter in patients than in controls and remained shorter in patients for both motor and somatosensory stimulation. The patients reported a subjective improvement of both initiating and maintaining sleep the night after the rTMS over S1. Patients exhibited a decrease in rMT after rTMS of S1 only, although the effect was smaller than in controls. MEP latency and CMCT changed only in controls after stimulation. Sham stimulation was without effect on the observed variables. Conclusions rTMS on S1-M1 connectivity alleviated the sensory-motor complaints of RLS patients. The TMS indexes of excitation and inhibition indicate an intracortical and corticospinal imbalance, mainly involving gamma-aminobutyric acid (GABA)ergic and glutamatergic circuitries, as well as an impairment of the short-term mechanisms of cortical plasticity. The rTMS-induced activation of the dorsal striatum with the consequent increase of dopamine release may have contributed to the clinical and neurophysiological outcome.
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Affiliation(s)
- Giuseppe Lanza
- Oasi Research Institute - IRCCS Via Conte Ruggero, 73 - 94018, Troina, Italy
| | | | | | | | | | | | | | | | - Rita Bella
- Department of Medical and Surgical Sciences and Advanced Technologies 'GF Ingrassia', Azienda Ospedaliero Universitaria Policlinico Vittorio Emanuele Catania, Catania, Italy
| | - Giovanni Pennisi
- Department of Surgery and Medical-Surgical Specialties, Azienda Ospedaliero Universitaria Policlinico-Vittorio Emanuele, Catania, Italy
| | - Walter Paulus
- Department of Clinical Neurophysiology, Georg August University Göttingen, Göttingen, Germany
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Antinociceptive Activity of Methanolic Extract of Clinacanthus nutans Leaves: Possible Mechanisms of Action Involved. Pain Res Manag 2018; 2018:9536406. [PMID: 29686743 PMCID: PMC5857305 DOI: 10.1155/2018/9536406] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 12/18/2017] [Indexed: 01/07/2023]
Abstract
Methanolic extract of Clinacanthus nutans Lindau leaves (MECN) has been proven to possess antinociceptive activity that works via the opioid and NO-dependent/cGMP-independent pathways. In the present study, we aimed to further determine the possible mechanisms of antinociception of MECN using various nociceptive assays. The antinociceptive activity of MECN was (i) tested against capsaicin-, glutamate-, phorbol 12-myristate 13-acetate-, bradykinin-induced nociception model; (ii) prechallenged against selective antagonist of opioid receptor subtypes (β-funaltrexamine, naltrindole, and nor-binaltorphimine); (iii) prechallenged against antagonist of nonopioid systems, namely, α2-noradrenergic (yohimbine), β-adrenergic (pindolol), adenosinergic (caffeine), dopaminergic (haloperidol), and cholinergic (atropine) receptors; (iv) prechallenged with inhibitors of various potassium channels (glibenclamide, apamin, charybdotoxin, and tetraethylammonium chloride). The results demonstrated that the orally administered MECN (100, 250, and 500 mg/kg) significantly (p < 0.05) reversed the nociceptive effect of all models in a dose-dependent manner. Moreover, the antinociceptive activity of 500 mg/kg MECN was significantly (p < 0.05) inhibited by (i) antagonists of μ-, δ-, and κ-opioid receptors; (ii) antagonists of α2-noradrenergic, β-adrenergic, adenosinergic, dopaminergic, and cholinergic receptors; and (iii) blockers of different K+ channels (voltage-activated-, Ca2+-activated, and ATP-sensitive-K+ channels, resp.). In conclusion, MECN-induced antinociception involves modulation of protein kinase C-, bradykinin-, TRVP1 receptors-, and glutamatergic-signaling pathways; opioidergic, α2-noradrenergic, β-adrenergic, adenosinergic, dopaminergic, and cholinergic receptors; and nonopioidergic receptors as well as the opening of various K+ channels. The antinociceptive activity could be associated with the presence of several flavonoid-based bioactive compounds and their synergistic action with nonvolatile bioactive compounds.
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Wang X, Ma S, Wu H, Shen X, Xu S, Guo X, Bolick ML, Wu S, Wang F. Macrophage migration inhibitory factor mediates peripheral nerve injury-induced hypersensitivity by curbing dopaminergic descending inhibition. Exp Mol Med 2018; 50:e445. [PMID: 29504609 PMCID: PMC5903823 DOI: 10.1038/emm.2017.271] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/25/2017] [Accepted: 09/12/2017] [Indexed: 12/21/2022] Open
Abstract
Our previous works disclosed the contributing role of macrophage migration inhibitory factor (MIF) and dopaminergic inhibition by lysine dimethyltransferase G9a/Glp complex in peripheral nerve injury-induced hypersensitivity. We herein propose that the proinflammatory cytokine MIF participates in the regulation of neuropathic hypersensitivity by interacting with and suppressing the descending dopaminergic system. The lumbar spinal cord (L-SC) and ventral tegmental area (VTA) are two major locations with significant upregulation of MIF after chronic constriction injury (CCI) of the sciatic nerve, and they display time-dependent changes, along with a behavioral trajectory. Correspondingly, dopamine (DA) content shows the reverse characteristic change to MIF with a time-dependent curve in post-surgical behavior. The levels of both MIF and DA are reversed by the MIF tautomerase inhibitor ISO-1, and a negative relationship exists between MIF and DA. The reversed role of ISO-1 also affects tyrosine hydroxylase expression. Furthermore, CCI induces Th promoter CpG site methylation in the L-SC and VTA areas, and this effect could be abated by ISO-1 administration. G9a/SUV39H1 and H3K9me2/H3K9me3 enrichment within the Th promoter region following CCI in the L-SC and VTA was also decreased by ISO-1. In cultured dopaminergic neurons, rMIF enhanced the recruitment of G9a and SUV39H1, followed by an increase in H3K9me2/H3K9me3. These molecular changes correspondingly exhibited alterations in Th promoter CpG site methylation and pain behaviors. In summary, MIF functions as a braking factor in curbing dopaminergic descending inhibition in peripheral nerve injury-induced hypersensitivity by mediating Th gene methylation through G9a/SUV39H1-associated H3K9 methylation.
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Affiliation(s)
- Xian Wang
- Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
| | - Shaolei Ma
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Haibo Wu
- Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
| | - Xiaofeng Shen
- Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
| | - Shiqin Xu
- Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
| | - Xirong Guo
- Institute of Pediatrics, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
| | - Maria L Bolick
- Group of Neuropharmacology and Neurophysiology, Division of Neuroscience, The Bonoi Academy of Science and Education, Chapel Hill, NC, USA
| | - Shizheng Wu
- Department of Neurology, Qinghai Provincial People's Hospital, Xining, China
| | - Fuzhou Wang
- Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China.,Group of Neuropharmacology and Neurophysiology, Division of Neuroscience, The Bonoi Academy of Science and Education, Chapel Hill, NC, USA
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Cardoso-Cruz H, Dourado M, Monteiro C, Galhardo V. Blockade of dopamine D2 receptors disrupts intrahippocampal connectivity and enhances pain-related working memory deficits in neuropathic pain rats. Eur J Pain 2018; 22:1002-1015. [PMID: 29377353 DOI: 10.1002/ejp.1186] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2017] [Indexed: 11/09/2022]
Abstract
BACKGROUND Dopamine (DA) is thought to be important to local hippocampal networks integrity during spatial working memory (sWM) processing. Chronic pain may contribute to deficient dopaminergic signalling, which may in turn affect cognition. However, the neural mechanisms that determine this impairment are poorly understood. Here, we evaluated whether the sWM impairment characteristic of animal models of chronic pain is dependent on DA D2 receptor (D2r) activity. METHODS To address this issue, we implanted multichannel arrays of electrodes in the dorsal and ventral hippocampal CA1 field (dvCA1) of rats and recorded the neuronal activity during a classical delayed food-reinforced T-maze sWM task. Within-subject behavioural performance and patterns of dorsoventral neural activity were assessed before and after the onset of persistent neuropathic pain using the spared nerve injury (SNI) model. RESULTS Our results show that the peripheral nerve lesion caused a disruption in sWM and hippocampus spike activity and that disruption was maximized by the systemic administration of the D2r antagonist raclopride. These deficits are strictly correlated with a selective disruption of hippocampal theta-oscillations. Particularly, we found a significant decrease in intrahippocampal CA1 field connectivity level. CONCLUSIONS Together, these results suggest that disruption of the dopaminergic balance in the intrahippocampal networks may be important for the development of cognitive deficits experienced during painful conditions. SIGNIFICANCE This study provides new insights into the role of D2r in the manifestation of pain-related sWM deficits. Our findings support that selective blockade of D2r produces a significant decrease in intrahippocampal connectivity mediated by theta-oscillations, and amplifies pain-related sWM deficits. These results suggest that further characterization of intrahippocampal dopaminergic modulation may be clinically relevant for the understanding of cognitive impairments that accompanies nociceptive stressful conditions.
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Affiliation(s)
- H Cardoso-Cruz
- Departamento de Biomedicina - Unidade de Biologia Experimental, Faculdade de Medicina, Centro de investigação Médica, Universidade do Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde & IBMC - Instituto de Biologia Molecular e Celular, Pain Research Group, Universidade do Porto, Porto, Portugal
| | - M Dourado
- Departamento de Biomedicina - Unidade de Biologia Experimental, Faculdade de Medicina, Centro de investigação Médica, Universidade do Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde & IBMC - Instituto de Biologia Molecular e Celular, Pain Research Group, Universidade do Porto, Porto, Portugal.,PDN - Programa Doutoral em Neurociências, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - C Monteiro
- Departamento de Biomedicina - Unidade de Biologia Experimental, Faculdade de Medicina, Centro de investigação Médica, Universidade do Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde & IBMC - Instituto de Biologia Molecular e Celular, Pain Research Group, Universidade do Porto, Porto, Portugal
| | - V Galhardo
- Departamento de Biomedicina - Unidade de Biologia Experimental, Faculdade de Medicina, Centro de investigação Médica, Universidade do Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde & IBMC - Instituto de Biologia Molecular e Celular, Pain Research Group, Universidade do Porto, Porto, Portugal
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120
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Takahashi N, Kasahara S, Yabuki S. Development and implementation of an inpatient multidisciplinary pain management program for patients with intractable chronic musculoskeletal pain in Japan: preliminary report. J Pain Res 2018; 11:201-211. [PMID: 29391827 PMCID: PMC5774477 DOI: 10.2147/jpr.s154171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Introduction Multidisciplinary pain management is a useful method to treat chronic musculoskeletal pain. Few facilities in Japan administer a multidisciplinary pain management program, especially an inpatient program. Therefore, we implemented a multidisciplinary pain management program in our hospital based on biopsychosocial factors guided by the recommendations of the International Association for the Study of Pain. The purpose of this study is to describe our inpatient pain management program for Japanese patients, which uses the biopsychosocial method of pain self-management. Materials and methods Fourteen patients with intractable chronic musculoskeletal pain, who were implemented a multidisciplinary pain management program in our hospital, were studied using the evaluation of the pain and associated factors and physical function. Results Significant improvement in outcomes were seen in the brief pain inventory, the pain catastrophizing scale (rumination, magnification, and helplessness), the pain disability assessment scale, the hospital anxiety and depression scale (anxiety and depression), the pain self-efficacy questionnaire, the EuroQol five dimensions questionnaire, and muscle endurance and physical fitness. We found no statistically significant differences in static flexibility or walking ability. Conclusion We developed an inpatient chronic pain management program for Japanese patients. Our results suggest that our program improves chronic musculoskeletal pain coping mechanisms, and that the program can improve patients' quality of life and some physical function. This inpatient pain management program is being expanded to better help intractable chronic musculoskeletal pain patients.
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Affiliation(s)
- Naoto Takahashi
- Department of Pain Medicine, Fukushima Medical University School of Medicine, Fukushima.,Pain Management Center, Hoshi General Hospital, Koriyama, Japan
| | - Satoshi Kasahara
- Department of Pain Medicine, Fukushima Medical University School of Medicine, Fukushima.,Pain Management Center, Hoshi General Hospital, Koriyama, Japan
| | - Shoji Yabuki
- Department of Pain Medicine, Fukushima Medical University School of Medicine, Fukushima.,Pain Management Center, Hoshi General Hospital, Koriyama, Japan
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Hernandez-Leon A, Fernández-Guasti A, Martínez A, Pellicer F, González-Trujano ME. Sleep architecture is altered in the reserpine-induced fibromyalgia model in ovariectomized rats. Behav Brain Res 2018; 364:383-392. [PMID: 29326058 DOI: 10.1016/j.bbr.2018.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/11/2017] [Accepted: 01/06/2018] [Indexed: 10/18/2022]
Abstract
Fibromyalgia (FM) is a musculoskeletal chronic pain syndrome with various concomitant symptoms like sleep disorders. FM patients are mainly women and menopause might play an important role in the altered processing of somatosensory information. Adverse effects and moderated efficacy of drugs promote treatment discontinuation by patients. Animal models of FM report pain and depression-like behaviors, but none of them have explored sleep disturbance as possible marker in the preclinic diagnostic. The aim of this study was to investigate alterations of the sleep architecture in the reserpine (RES)-induced FM model in ovarectomized (OVX) rats. The behavioral thresholds of nociceptive response in the experimental FM were analyzed in a first block using muscle pressure, tactile response and allodynia to cold stimulus. In a second block, the sleep-wake cycle was examined in a polysomnographic study. Groups (n = 8) consisted in: (a) no treatment, (b) RES vehicle, (c) RES alone, (d) RES + vehicle of fluoxetine (FLX, antidepressant reference drug), and (e) RES + FLX. Our results demonstrated that RES induced pain-related behavior (50-70%) in OVX rats and altered sleep architecture by the increase of total wake time (38%), diminution of the no-REM stage (SWS-I 33% and SWS-II 76%), and abolition of the REM sleep, effects that were partially reverted in the presence of FLX. In conclusion, our results support the face validity of the RES-induced pain-related behavior as FM model showing nociceptive behavioral responses associated to sleep alterations observed as symptoms in FM patients; thus, these evidences substantiate its usefulness to look for alternatives of treatment for FM symptoms.
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Affiliation(s)
- Alberto Hernandez-Leon
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico; Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV) of the National Polytechnic Institute, Calz. De los Tenorios No. 235, Col. Granjas Coapa, C.P. 14330, D. F. México, Mexico
| | - Alonso Fernández-Guasti
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV) of the National Polytechnic Institute, Calz. De los Tenorios No. 235, Col. Granjas Coapa, C.P. 14330, D. F. México, Mexico
| | - Adrián Martínez
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico
| | - Francisco Pellicer
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico
| | - María Eva González-Trujano
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico.
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Brain Reward Circuit and Pain. ADVANCES IN PAIN RESEARCH: MECHANISMS AND MODULATION OF CHRONIC PAIN 2018; 1099:201-210. [DOI: 10.1007/978-981-13-1756-9_17] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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123
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Lanza G, Cantone M, Aricò D, Lanuzza B, Cosentino FII, Paci D, Papotto M, Pennisi M, Bella R, Pennisi G, Paulus W, Ferri R. Clinical and electrophysiological impact of repetitive low-frequency transcranial magnetic stimulation on the sensory-motor network in patients with restless legs syndrome. Ther Adv Neurol Disord 2018; 11:1756286418759973. [PMID: 29511386 PMCID: PMC5833163 DOI: 10.1177/1756286418759973] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/22/2017] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Based on the hyperexcitability and disinhibition observed in patients with restless legs syndrome (RLS) following transcranial magnetic stimulation (TMS), we conducted a study with low-frequency repetitive TMS (rTMS) over the primary motor (M1) and somatosensory cortical areas (S1) in patients with RLS. METHODS A total of 13 right-handed patients and 10 age-matched controls were studied using clinical scales and TMS. Measurements included resting motor threshold (rMT), motor-evoked potentials (MEPs), cortical silent period (CSP), and central motor conduction time (CMCT). A single evening session of rTMS (1 Hz, 20 trains, 50 stimuli each) was administered over the left M1, left S1, and sham stimulation over M1 in a random order. Clinical and TMS measures were repeated after each stimulation modality. RESULTS Baseline CSP was shorter in patients than in controls and remained shorter in patients for both motor and somatosensory stimulation. The patients reported a subjective improvement of both initiating and maintaining sleep the night after the rTMS over S1. Patients exhibited a decrease in rMT after rTMS of S1 only, although the effect was smaller than in controls. MEP latency and CMCT changed only in controls after stimulation. Sham stimulation was without effect on the observed variables. CONCLUSIONS rTMS on S1-M1 connectivity alleviated the sensory-motor complaints of RLS patients. The TMS indexes of excitation and inhibition indicate an intracortical and corticospinal imbalance, mainly involving gamma-aminobutyric acid (GABA)ergic and glutamatergic circuitries, as well as an impairment of the short-term mechanisms of cortical plasticity. The rTMS-induced activation of the dorsal striatum with the consequent increase of dopamine release may have contributed to the clinical and neurophysiological outcome.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Rita Bella
- Department of Medical and Surgical Sciences and Advanced Technologies ‘GF Ingrassia’, Azienda Ospedaliero Universitaria Policlinico Vittorio Emanuele Catania, Catania, Italy
| | - Giovanni Pennisi
- Department of Surgery and Medical–Surgical Specialties, Azienda Ospedaliero Universitaria Policlinico-Vittorio Emanuele, Catania, Italy
| | - Walter Paulus
- Department of Clinical Neurophysiology, Georg August University Göttingen, Göttingen, Germany
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Espinosa-Juárez JV, Jaramillo-Morales OA, López-Muñoz FJ. Haloperidol Decreases Hyperalgesia and Allodynia Induced by Chronic Constriction Injury. Basic Clin Pharmacol Toxicol 2017; 121:471-479. [PMID: 28654186 DOI: 10.1111/bcpt.12839] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 06/21/2017] [Indexed: 01/12/2023]
Abstract
Neuropathic pain has proven to be a difficult condition to treat, so investigational therapy has been sought that may prove useful, such as the use of sigma-1 antagonists. Haloperidol (HAL) is a compound that shows a high affinity with these receptors, acting as an antagonist. Therefore, the objective of this study was to demonstrate its effect in an experimental model of neuropathic pain and corroborate its antagonistic action of the sigma-1 receptors under these conditions. BD-1063 was used as a sigma-1 antagonist control, and gabapentin (Gbp) was used as a positive control. The antihyperalgesic and anti-allodynic effects of the drugs were determined after single-dose trials. In every case, the effects increased in a dose-dependent manner. HAL had the same efficacy as both BD-1063 and Gbp. In the analysis of pharmacological potency, in which the ED50 were compared, HAL was the most potent drug of all. The effect of HAL on chronic constriction injury (CCI) rats was reversed by the sigma-1 agonist (PRE-084). HAL reversed the hyperalgesic and allodynic effects of PRE-084 in naïve rats. The dopamine antagonist, (-)-sulpiride, showed no effect in CCl rats. These results suggest that HAL presents an antinociceptive effect via sigma-1 receptor antagonism at the spinal level in the CCl model.
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Pharmacological modulation of neuropathic pain-related depression of behavior: effects of morphine, ketoprofen, bupropion and [INCREMENT]9-tetrahydrocannabinol on formalin-induced depression of intracranial self-stimulation in rats. Behav Pharmacol 2017; 27:364-76. [PMID: 26588213 DOI: 10.1097/fbp.0000000000000207] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neuropathic pain is often associated with behavioral depression. Intraplantar formalin produces sustained, neuropathy-associated depression of intracranial self-stimulation (ICSS) in rats. This study evaluated pharmacological modulation of formalin-induced ICSS depression. Rats with intracranial electrodes targeting the medial forebrain bundle responded for electrical brain stimulation in an ICSS procedure. Bilateral intraplantar formalin administration depressed ICSS for 14 days. Morphine (0.32-3.2 mg/kg), ketoprofen (0.1-10 mg/kg), bupropion (3.2-32 mg/kg), and [INCREMENT]9-tetrahydrocannabinol (THC; 0.32-3.2 mg/kg) were evaluated for their effectiveness to reverse formalin-induced depression of ICSS. Drug effects on formalin-induced mechanical allodynia were evaluated for comparison. Morphine and bupropion reversed both formalin-induced ICSS depression and mechanical allodynia, and effects on ICSS were sustained during repeated treatment. Ketoprofen failed to reverse either formalin effect. THC blocked mechanical allodynia, but decreased ICSS in control rats and exacerbated formalin-induced depression of ICSS. The failure of ketoprofen to alter formalin effects suggests that formalin effects result from neuropathy rather than inflammation. The effectiveness of morphine and bupropion to reverse formalin effects agrees with other evidence that these drugs block pain-depressed behavior in rats and relieve neuropathic pain in humans. The effects of THC suggest general behavioral suppression and do not support the use of THC to treat neuropathic pain.
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Afify EA, Andijani NM. Potentiation of Morphine-Induced Antinociception by Propranolol: The Involvement of Dopamine and GABA Systems. Front Pharmacol 2017; 8:794. [PMID: 29209205 PMCID: PMC5701645 DOI: 10.3389/fphar.2017.00794] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/20/2017] [Indexed: 12/26/2022] Open
Abstract
Tolerance to the analgesic effect of morphine is a major clinical problem which can be managed by co-administration of another drug. This study investigated the ability of propranolol to potentiate the antinociceptive action of morphine and the possible mechanisms underlying this effect. Antinociception was assessed in three nociceptive tests (thermal, hot plate), (visceral, acetic acid), and (inflammatory, formalin test) in mice and quantified by measuring the percent maximum possible effect, the percent inhibition of acetic acid-evoked writhing response, and the area under the curve values of number of flinches for treated mice, respectively. The study revealed that propranolol (0.25-20 mg/Kg, IP) administration did not produce analgesia in mice. However, 10 mg/Kg propranolol, enhanced the antinociceptive effect of sub-analgesic doses of morphine (0.2, 1, and 2 mg/Kg, IP) in the three nociceptive tests. It also shifted the dose response curve of morphine to the left. The combined effect of propranolol and morphine was attenuated by haloperidol (D2 receptor antagonist, 1.5 mg/Kg, IP), and bicuculline (GABAA receptor antagonist, 2 mg/Kg, IP). Repeated daily administration of propranolol (10 mg/Kg, IP) did not alter the nociceptive responses in the three pain tests, but it significantly potentiated morphine-induced antinociception in the hot plate, acetic acid-evoked writhing, and in the second phase of formalin tests. Together, the data suggest that a cross-talk exists between the opioidergic and adrenergic systems and implicate dopamine and GABA systems in this synergistic effect of morphine-propranolol combination. Propranolol may serve as an adjuvant therapy to potentiate the effect of opioid analgesics.
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Affiliation(s)
- Elham A Afify
- Department of Pharmacology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Najlaa M Andijani
- Department of Pharmacology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
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127
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Motaghinejad O, Motaghinejad M, Motevalian M. Preventive Effect of Maternal Forced Exercise on Offspring Pain Perception and Intensity: The Role of 5-HT 2 and D 2 Receptors. Adv Biomed Res 2017; 6:135. [PMID: 29279833 PMCID: PMC5698979 DOI: 10.4103/2277-9175.218026] [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] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Many previous studies showed that maternal forced exercise can reduce some central disorders in offsprings, but its clear mechanism remains unclear. In this study, the role of 5-HT2 and D2 receptors in neuroprotective effects of maternal forced exercise in offspring neurodevelopment and effect on some behaviors were evaluated. MATERIALS AND METHODS Forty-eight pregnant rats were trained by forced exercise, and some behavioral assays in their offspring were performed in the presence and absence of 5-HT2 and D2 receptor antagonists in various experimental groups. RESULTS Our data showed that maternal forced exercise caused increase in latency of pain perception in offsprings in hot plate test, writhing test (WT), and tail flick test. Furthermore, a decrease in intensity was shown by WT. On the other hand, treatment of mothers by forced exercise in combination with 5-HT2 and D2 receptor antagonists could inhibit these effects of forced exercise and cause disturbances in pain perception and intensity. CONCLUSION Our data suggested that maternal forced exercise causes protective effects on offspring pain perception and intensity, and in this effect, 5-HT2 and D2 receptors are probably involved.
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Affiliation(s)
- Ozra Motaghinejad
- From the Department of Pharmacology, School of Medicine and Razi Institute for Drug Research, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Motaghinejad
- From the Department of Pharmacology, School of Medicine and Razi Institute for Drug Research, Iran University of Medical Sciences, Tehran, Iran
| | - Manijeh Motevalian
- From the Department of Pharmacology, School of Medicine and Razi Institute for Drug Research, Iran University of Medical Sciences, Tehran, Iran
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Abstract
Although debate on the concept of fibromyalgia (FM) has been vigorous ever since the classification criteria were first published, FM is now better understood and has become recognized as a disorder. Recently, FM has come to be considered a major health problem, affecting 1% to 5% of the general population. As familial aggregations have been observed among some FM patients, genetic research on FM is logical. In fact, genome-wide association studies and linkage analysis, and studies on candidate genes, have uncovered associations between certain genetic factors and FM. Genetic susceptibility is now considered to influence the etiology of FM. At the same time, novel genetic techniques, such as microRNA analysis, have been used in attempts to improve our understanding of the genetic predisposition to FM. In this article, we review recent advances in, and continuing challenges to, the identification of genes contributing to the development of, and symptom severity in, FM.
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Affiliation(s)
- Dong-Jin Park
- Department of Rheumatology, Chonnam National University Hospital, Gwangju, Korea
| | - Shin-Seok Lee
- Department of Rheumatology, Chonnam National University Hospital, Gwangju, Korea
- Correspondence to Shin-Seok Lee, M.D. Department of Rheumatology, Chonnam National University Hospital, 42 Jebong-ro, Dong-gu, Gwangju 61469, Korea Tel: +82-62-220-6591 Fax: +82-62-225-8578 E-mail:
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129
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Dopaminergic tone does not influence pain levels during placebo interventions in patients with chronic neuropathic pain. Pain 2017; 159:261-272. [DOI: 10.1097/j.pain.0000000000001089] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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130
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Hussain ASM, Renno WM, Sadek HL, Kayali NM, Al-Salem A, Rao MS, Khan KM. Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model. Neuropharmacology 2017; 128:231-243. [PMID: 29054367 DOI: 10.1016/j.neuropharm.2017.10.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/28/2017] [Accepted: 10/15/2017] [Indexed: 12/29/2022]
Abstract
Monoamine oxidase-B (MAOB), a flavin adenine dinucleotide (FAD), is an enzyme which catalyzes the oxidation of amines. MAOB is proposed to play a major role in the pathogenesis of neurodegeneration through the production of reactive oxygen species (ROS) and neurotoxins. The present study was designed to outline the effects of the MAOB inhibitor (MAOB-I) on neuroprotection of spinal neurons, regeneration of sciatic nerve fibers, and recovery of sensory-motor functions in the sciatic nerve crush injury model. Male Wistar rats (4-months-old) were assigned to i) Naïve (N), ii) Sham (S), iii) Sciatic nerve crush and treated with saline (CRUSH + SALINE) and iv) Sciatic nerve crush and treated with MAOB inhibitor (CRUSH + MAOB-I) groups (n = 10/group). In groups iii and iv, the crush injury was produced by crushing the sciatic nerve followed by treatment with saline or MAOB-I (Selegiline® 2.5 mg/kg) intraperitoneally for 10 days. Behavioral tests were conducted from week 1 to week 6. At the end of the study, sciatic nerve and lumbar spinal cord were examined by immunohistochemistry, light and electron microscopy. MAOB-I treatment showed significant improvement in sensory and motor functions compared to saline treatment (p < 0.05-0.001) in injured nerves. The morphological study showed a significantly increased number of nerve fibers in sciatic nerve distal to the site of injury (p < 0.05), with better myelination pattern in CRUSH + MAOB-I treated group compared to CRUSH + SALINE group. Spinal cord ventral horns showed a significant increase in the number of NeuN-immunoreactive neurons in the MAOB-I treated group compared to Saline treated group (p < 0.01). MAOB-I has a significant potential for protecting the degenerating spinal cord neurons and enhancing the regeneration of injured sciatic nerve fibers following crush injury.
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Affiliation(s)
| | - Waleed M Renno
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.
| | - Hanaa L Sadek
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Noura M Kayali
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Aseel Al-Salem
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Muddanna S Rao
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
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131
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Motaghinejad O, Motaghinejad M, Motevalian M, Rahimi-Sharbaf F, Beiranvand T. The effect of maternal forced exercise on offspring pain perception, motor activity and anxiety disorder: the role of 5-HT2 and D2 receptors and CREB gene expression. J Exerc Rehabil 2017; 13:514-525. [PMID: 29114525 PMCID: PMC5667597 DOI: 10.12965/jer.1734992.496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 09/13/2017] [Indexed: 12/16/2022] Open
Abstract
The effect of maternal forced exercise on central disorders in offsprings has been shown but the mechanism is still unclear. In this study, the role of 5-HT2 and D2 receptors in neuroprotective effects of maternal forced exercise on offspring neurodevelopment and neurobehavioral symptoms is evaluated. Sixty pregnant rats were trained by forced exercise and some behavioral and molecular aspects in their offspring were evaluated in presence of 5-HT2 and D2 receptors agonists and antagonists. The results showed that maternal forced exercise causes increase of pain tolerability and increase latency of pain perception in offspring in hot plate test, writhing test and tail flick test. Also maternal forced exercise causes decrease of depression and anxiety like behavior in offsprings. On the other hand, treatment of mothers by forced exercise in combination with 5-HT2 and D2 receptor antagonists inhibited the protective effects of forced exercise and cause disturbance in pain perception and tolerability and increase depression and anxiety in offsprings. Also expression of cyclic AMP response element binding protein (CREB) was changed in all experimental groups. In conclusion, our data suggested that maternal forced exercise causes neurobehavioral protective effect on offsprings and this effect might probably be mediated by 5-HT2 and D2 receptors and activation of CREB gene expression.
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Affiliation(s)
- Ozra Motaghinejad
- Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Motaghinejad
- Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Manijeh Motevalian
- Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - Tabassom Beiranvand
- Razi Drug Research Center and Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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132
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Discovery of endogenous opioid systems: what it has meant for the clinician's understanding of pain and its treatment. Pain 2017; 158:2290-2300. [DOI: 10.1097/j.pain.0000000000001043] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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133
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Barczewska M, Juranek J, Wojtkiewicz J. Origins and Neurochemical Characteristics of Porcine Intervertebral Disc Sympathetic Innervation: a Preliminary Report. J Mol Neurosci 2017; 63:50-57. [PMID: 28762133 PMCID: PMC5581820 DOI: 10.1007/s12031-017-0956-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 07/21/2017] [Indexed: 11/28/2022]
Abstract
Intervertebral disc diseases (IVDDs) form a group of a vertebral column disorders affecting a large number of people worldwide. It is estimated that approximately 30% of individuals at the age of 35 and approximately 90% of individuals at the age of 60 and above will have some form of disc-affecting pathological changes leading to disc herniation, prolapse and degeneration as well as discogenic pain. Here, we aimed to establish the origins and neurochemical characteristics of porcine intervertebral disc sympathetic innervation involved in pain signalling in IVDD patients. Pigs were given an injection of the Ominipaque contrast agent and Fast Blue (FB) retrograde tracer into the L4-L5 intervertebral disc and euthanized at 2, 1, and 3 months post injection. Following euthanasia, bilateral sympathetic chain ganglia (SChG) Th13 to C1 were collected. The presence, distribution and neurochemical characteristics of retrogradely labelled SChG neurons were examined. The majority (88.8%) of all FB+ cells were found in the L3-L5 SChG. Most FB+ neurons stained for dopamine beta hydroxylase (DBH); one-third to one-quarter stained for somatostatin (SOM), neuropeptide Y (NPY) or leu-enkephalin (LENK); and only a few stained for galanin (GAL). Compared with the control, the greatest decline in neurochemical immunostaining was observed 2 weeks post injection, and the lowest decline was noticed 1 month post injection. Our study, for the first time, provides insight into the complex patterns of intervertebral disc sympathetic innervation and suggests that the best time for neurochemical balance restoration therapy would be 1 month post-injury, when the neuronal concentration of all studied substances is close to the initial physiological level, thus providing favourable conditions for successful recovery.
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Affiliation(s)
- Monika Barczewska
- Department of Neurology and Neurosurgery, Faculty of Medical Sciences, University of Warmia and Mazury, Olsztyn, Poland
| | - Judyta Juranek
- Department of Pathophysiology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Ul. Warszawska 30, 10-082, Olsztyn, Poland
| | - Joanna Wojtkiewicz
- Department of Pathophysiology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Ul. Warszawska 30, 10-082, Olsztyn, Poland. .,Laboratory for Regenerative Medicine, Faculty of Medical Sciences, University of Warmia and Mazury, Olsztyn, Poland. .,Foundation for the Nerve Cells Regeneration, Olsztyn, Poland.
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134
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Simón-Arceo K, González-Trujano ME, Coffeen U, Fernández-Mas R, Mercado F, Almanza A, Contreras B, Jaimes O, Pellicer F. Neuropathic and inflammatory antinociceptive effects and electrocortical changes produced by Salvia divinorum in rats. JOURNAL OF ETHNOPHARMACOLOGY 2017; 206:115-124. [PMID: 28502907 DOI: 10.1016/j.jep.2017.05.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 05/02/2017] [Accepted: 05/10/2017] [Indexed: 05/29/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Salvia divinorum is a medicinal plant traditionally used in hallucinogenic ethnopharmacological practices and for its analgesic and antinflammatory properties. Its active compounds include diterpenes known as salvinorins which act as potent κ opioid receptor agonists. AIM OF THE STUDY Given its effects in acute animal models of pain, as well as its antinflammatory attributes, we decided to investigate the analgesic effects of an SD extract in neuropathic (sciatic loose nerve ligature) and inflammatory (intra plantar carrageenan) pain models in rats. We also determined in this study the electrocorticographic changes to correlate similar hallucinogenic state and behavior as those produced in humans. MATERIAL AND METHODS Mechanical and thermonociceptive responses, plantar test and von Frey assay, respectively, were measured in adult Wistar rats 30min, 3h and 24h after the intraperitoneal administration of saline or an hydroponic SD extract. We also evaluated carbamazepine and celecoxib, as gold reference drugs, to compare its antinociceptive effects. RESULTS Our results showed that administration of SD extract induced antialgesic effects in both neuropathic and inflammatory pain models. All those effects were blocked by nor-binaltorphimine (a Kappa opioid receptor antagonist). Moreover, it was observed an increase of the anterior power spectral density and a decrease in the posterior region as electrocorticographic changes. CONCLUSION The present investigation give evidence that SD is capable to reduce algesic response associated to neuropathic and inflammatory nociception. This study support therapeutic alternatives for a disabling health problem due to the long term pain with high impact on population and personal and social implications.
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Affiliation(s)
- Karina Simón-Arceo
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Ma Eva González-Trujano
- Laboratorio de Neurofarmacología de Productos Naturales, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Ulises Coffeen
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Rodrigo Fernández-Mas
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Francisco Mercado
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Angélica Almanza
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Bernardo Contreras
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Orlando Jaimes
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
| | - Francisco Pellicer
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México Xochimilco 101, San Lorenzo Huipulco, Tlalpan, CP 14370 Ciudad de México, México.
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135
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Abstract
Primary burning mouth syndrome (BMS) is an oral mucosal disorder that is characterized by a chronic and often debilitating intraoral burning sensation for which no localized or systemic cause can be found. BMS most commonly affects postmenopausal women. The pathophysiology of primary BMS is not well understood. Diagnosing BMS can prove to be challenging. BMS patients can also pose a therapeutic challenge to clinicians who are consulted to evaluate these patients. Most commonly used therapies include tricyclic antidepressants, α-lipoic acid, clonazepam, and cognitive-behavioral therapy. Clinical judgment, patient counseling, and monitoring of pain are important. Further research is required to assess the effectiveness of serotonin and newer serotonin-noradrenalin reuptake inhibitors.
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Affiliation(s)
- Siamak Moghadam-Kia
- Department of Rheumatology, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Nasim Fazel
- Department of Dermatology, University of California, Davis School of Medicine, Sacramento, CA.
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136
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Defazio G, Antonini A, Tinazzi M, Gigante AF, Pietracupa S, Pellicciari R, Bloise M, Bacchin R, Marcante A, Fabbrini G, Berardelli A. Relationship between pain and motor and non-motor symptoms in Parkinson's disease. Eur J Neurol 2017; 24:974-980. [DOI: 10.1111/ene.13323] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/06/2017] [Indexed: 11/26/2022]
Affiliation(s)
- G. Defazio
- Department of Basic Medical Sciences; Neuroscience and Sense Organs; ‘Aldo Moro’ University of Bari; Bari Italy
| | - A. Antonini
- Parkinson and Movement Disorders Unit; IRCCS Hospital San Camillo; Venice Italy
| | - M. Tinazzi
- Department of Neurological and Movement Sciences; University of Verona; Verona Italy
| | - A. F. Gigante
- Department of Basic Medical Sciences; Neuroscience and Sense Organs; ‘Aldo Moro’ University of Bari; Bari Italy
| | | | - R. Pellicciari
- Department of Neurology and Psychiatry; Sapienza University of Rome; Rome Italy
| | - M. Bloise
- Department of Neurology and Psychiatry; Sapienza University of Rome; Rome Italy
| | - R. Bacchin
- Department of Neurological and Movement Sciences; University of Verona; Verona Italy
| | - A. Marcante
- Parkinson and Movement Disorders Unit; IRCCS Hospital San Camillo; Venice Italy
| | - G. Fabbrini
- IRCCS Neuromed Institute; Pozzilli Italy
- Department of Neurology and Psychiatry; Sapienza University of Rome; Rome Italy
| | - A. Berardelli
- IRCCS Neuromed Institute; Pozzilli Italy
- Department of Neurology and Psychiatry; Sapienza University of Rome; Rome Italy
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137
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Thompson T, Gallop K, Correll CU, Carvalho AF, Veronese N, Wright E, Stubbs B. Pain perception in Parkinson's disease: A systematic review and meta-analysis of experimental studies. Ageing Res Rev 2017; 35:74-86. [PMID: 28179128 DOI: 10.1016/j.arr.2017.01.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/25/2017] [Accepted: 01/25/2017] [Indexed: 01/05/2023]
Abstract
While hyperalgesia (increased pain sensitivity) has been suggested to contribute to the increased prevalence of clinical pain in Parkinson's disease (PD), experimental research is equivocal and mechanisms are poorly understood. We conducted a meta-analysis of studies comparing PD patients to healthy controls (HCs) in their response to experimental pain stimuli. Articles were acquired through systematic searches of major databases from inception until 10/2016. Twenty-six studies met inclusion criteria, comprising 1292 participants (PD=739, HCs=553). Random effects meta-analysis of standardized mean differences (SMD) revealed lower pain threshold (indicating hyperalgesia) in PD patients during unmedicated OFF states (SMD=0.51) which was attenuated during dopamine-medicated ON states (SMD=0.23), but unaffected by age, PD duration or PD severity. Analysis of 6 studies employing suprathreshold stimulation paradigms indicated greater pain in PD patients, just failing to reach significance (SMD=0.30, p=0.06). These findings (a) support the existence of hyperalgesia in PD, which could contribute to the onset/intensity of clinical pain, and (b) implicate dopamine deficiency as a potential underlying mechanism, which may present opportunities for the development of novel analgesic strategies.
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138
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Methylphenidate attenuates the response to cold pain but not to aversive auditory stimuli in healthy human: a double-blind randomized controlled study. Pain Rep 2017; 2:e593. [PMID: 29392209 PMCID: PMC5741299 DOI: 10.1097/pr9.0000000000000593] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/04/2017] [Accepted: 03/10/2017] [Indexed: 11/26/2022] Open
Abstract
This double-blind, crossover, randomized placebo-controlled study found that methylphenidate has a specific effect on nociceptive pathways rather than a generalized effect on aversive sensory modalities. Introduction: We recently showed that the psycho-stimulant norepinephrine–dopamine reuptake inhibitor methylphenidate (MP) prolonged cold pain threshold and tolerance in adults with attention-deficit hyperactivity disorder (ADHD). Objectives: The objectives of the present study were to: (1) examine whether MP has antinociceptive properties in healthy men; (2) test MP's effects on responses to aversive auditory stimuli. The underlying aim was to determine whether MP exerts antinociceptive properties or more generalized, nonspecific attenuating effects on different aversive sensory modalities. Methods: This double-blind, crossover, randomized placebo-controlled study consisted of 2 sessions one week apart from each other. In each session, pain threshold (seconds) and tolerance (seconds) in response to painful cold stimulation were measured. Additionally, threshold (dB) and tolerance (seconds) to loud aversive auditory stimuli (500 Hz, 2000 Hz and white noise) were also tested prior to and 2 hours following the administration of a single dose of either 20 mg MP or an identical looking placebo. Results: Forty men, 26.1 ± 4.0 (mean ± SD) years were enrolled in the study. Wilcoxon signed-rank test analyses showed that MP, but not the placebo, produced a significant increase in cold pain threshold (from 4.1 ± 2.6 to 5.4 ± 3.1 seconds, P = 0.001 and from 4.5 ± 2.6 to 4.3 ± 2.7 seconds, P = 0.2, respectively) and tolerance (from 57.8 ± 54.0 to 73.8 ± 61.8 seconds, P = 0.001 and from 52.5 ± 53.7 sec to 57.0 ± 52.9 seconds, P = 0.1, respectively). No significant changes were found in any of the auditory parameters. Conclusion: These results suggest that MP has an effect on nociceptive pathways rather than a nonspecific, generalized attenuating effect on aversive sensory stimuli.
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139
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Fuermaier ABM, Hüpen P, De Vries SM, Müller M, Kok FM, Koerts J, Heutink J, Tucha L, Gerlach M, Tucha O. Perception in attention deficit hyperactivity disorder. ACTA ACUST UNITED AC 2017; 10:21-47. [PMID: 28401487 DOI: 10.1007/s12402-017-0230-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 03/30/2017] [Indexed: 10/19/2022]
Abstract
A large body of research demonstrated that individuals with attention deficit hyperactivity disorder (ADHD) suffer from various neuropsychological deficits. In contrast, less is known and only divergent evidence exists on perceptual functions of individuals with ADHD. This is problematic as neuropsychological and perceptual functions are closely interrelated and are often difficult to disentangle in behavioral assessments. This study presents the conduct and results of a systematic literature review on perceptual functions in children and adults with ADHD. This review considers studies using psychophysical methods (objective measurements) and self- and informant reports (subjective measurements). Results indicate that individuals with ADHD have altered perceptual functions in various domains as compared to typically developing individuals. Increased perceptual functions in individuals with ADHD were found with regard to olfactory detection thresholds, whereas reduced perceptual functions were evident for aspects of visual and speech perception. Moreover, individuals with ADHD were found to experience discomfort to sensory stimuli at a lower level than typically developing individuals. Alterations of perceptual functions in individuals with ADHD were shown to be moderated by various factors, such as pharmacological treatment, cognitive functions, and symptom severity. We conclude by giving implications for daily life functioning and clinical practice.
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Affiliation(s)
- Anselm B M Fuermaier
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands.
| | - Philippa Hüpen
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Stefanie M De Vries
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Morgana Müller
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Francien M Kok
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Janneke Koerts
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Joost Heutink
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands.,Centre of Expertise for Blind and Partially Sighted People, Royal Dutch Visio, 9752 AC, Haren, The Netherlands
| | - Lara Tucha
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - Manfred Gerlach
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Centre for Mental Health, University Hospital of Würzburg, Füchsleinstrasse 15, 97080, Würzburg, Germany
| | - Oliver Tucha
- Department of Clinical and Developmental Neuropsychology, Faculty of Behavioural and Social Sciences, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
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DaSilva AF, Nascimento TD, Jassar H, Heffernan J, Toback RL, Lucas S, DosSantos MF, Bellile EL, Boonstra PS, Taylor JMG, Casey KL, Koeppe RA, Smith YR, Zubieta JK. Dopamine D2/D3 imbalance during migraine attack and allodynia in vivo. Neurology 2017; 88:1634-1641. [PMID: 28356463 DOI: 10.1212/wnl.0000000000003861] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 01/20/2017] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE To evaluate in vivo the dynamics of endogenous dopamine (DA) neurotransmission during migraine ictus with allodynia. METHODS We examined 8 episodic migraineurs and 8 healthy controls (HC) using PET with [11C]raclopride. The uptake measure of [11C]raclopride, nondisplaceable binding potential (BPND), would increase when there was a reduction in endogenous DA release. The opposite is true for a decrease in [11C]raclopride BPND. Patients were scanned twice: one PET session was during a spontaneous migraine ictus at rest, followed by a sustained thermal pain threshold (STPT) challenge on the trigeminal region, eliciting an allodynia experience; another was during interictal phase. RESULTS Striatal BPND of [11C]raclopride in migraineurs did not differ from HC. We found a significant increase in [11C]raclopride BPND in the striatum region of migraineurs during both headache attack and allodynia relative to interictal phase. However, when compared to the migraine attack at rest, migraineurs during the STPT challenge had a significant sudden reduction in [11C]raclopride BPND in the insula. Such directional change was also observed in the caudate of HC relative to the interictal phase during challenge. Furthermore, ictal changes in [11C]raclopride BPND in migraineurs at rest were positively correlated with the chronicity of migraine attacks, and negatively correlated with the frequency during challenge. CONCLUSIONS Our findings demonstrate that there is an imbalanced uptake of [11C]raclopride during the headache attack and ictal allodynia, which indicates reduction and fluctuation in ictal endogenous DA release in migraineurs. Moreover, the longer the history and recurrence of migraine attacks, the lower the ictal endogenous DA release.
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Affiliation(s)
- Alexandre F DaSilva
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor.
| | - Thiago D Nascimento
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Hassan Jassar
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Joseph Heffernan
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Rebecca L Toback
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Sarah Lucas
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Marcos F DosSantos
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Emily L Bellile
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Philip S Boonstra
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Jeremy M G Taylor
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Kenneth L Casey
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Robert A Koeppe
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Yolanda R Smith
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
| | - Jon-Kar Zubieta
- From the Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences Department, School of Dentistry (A.F.D., T.D.N., H.J., R.L.T., S.L., M.F.D.), Translational Neuroimaging Laboratory, Molecular & Behavioral Neuroscience Institute (A.F.D., J.H.. J.-K.Z.), Department of Biostatistics (E.L.B., P.S.B., J.M.G.T.), Department of Neurology (K.L.C.), PET Physics Section, Division of Nuclear Medicine, Radiology Department (R.A.K.), and Department of Obstetrics and Gynecology (Y.R.S.), University of Michigan, Ann Arbor
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141
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Mesolimbic dopamine signaling in acute and chronic pain: implications for motivation, analgesia, and addiction. Pain 2017; 157:1194-1198. [PMID: 26797678 PMCID: PMC4866581 DOI: 10.1097/j.pain.0000000000000494] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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142
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Weiss AL, Ehrhardt KP, Tolba R. Atypical Facial Pain: a Comprehensive, Evidence-Based Review. Curr Pain Headache Rep 2017; 21:8. [DOI: 10.1007/s11916-017-0609-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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143
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Functional MRI of the Reserpine-Induced Putative Rat Model of Fibromyalgia Reveals Discriminatory Patterns of Functional Augmentation to Acute Nociceptive Stimuli. Sci Rep 2017; 7:38325. [PMID: 28079057 PMCID: PMC5228122 DOI: 10.1038/srep38325] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 11/08/2016] [Indexed: 11/23/2022] Open
Abstract
Functional neuroimaging, applied to pre-clinical models of chronic pain, offers unique advantages in the drive to discover new treatments for this prevalent and oppressive condition. The high spatial and temporal resolution of fMRI affords detailed mapping of regional pharmacodynamics that underlie mechanisms of pain suppression by new analgesics. Despite evidence supporting the translational relevance of this approach, relatively few studies have investigated fMRI abnormalities in rodent models of chronic pain. In this study, we used fMRI to map the BOLD response in a recently developed putative rat model of fibromyalgia to innocuous and acute nociceptive stimuli by applying a step-wise graded electrical forepaw stimulation paradigm, with comparison to healthy controls. We observed discriminatory functional signatures (p < 0.001) to 2 mA electrical forepaw stimulation, found to be innocuous in the control group. As such, this translational approach provides sensitive and quantitative neural correlates of the underlying chronic disease. The regional patterns of functional augmentation were found to be concordant with previous studies of nociception in the anaesthetised rat brain, supporting the specificity of this approach in the study of altered central pain processing in reserpine induced myalgia. The methodology introduced in this work represents a novel platform for emerging treatment evaluation in highly experimentally controlled conditions.
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144
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Shibrya EE, Radwan RR, Abd El Fattah MA, Shabaan EA, Kenawy SA. Evidences for amelioration of reserpine-induced fibromyalgia in rat by low dose of gamma irradiation and duloxetine. Int J Radiat Biol 2017; 93:553-560. [DOI: 10.1080/09553002.2017.1270475] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Eman E. Shibrya
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Rasha R. Radwan
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Mai A. Abd El Fattah
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Esmat A. Shabaan
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Sanaa A. Kenawy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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145
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Blockade of neuronal dopamine D2 receptor attenuates morphine tolerance in mice spinal cord. Sci Rep 2016; 6:38746. [PMID: 28004735 PMCID: PMC5177930 DOI: 10.1038/srep38746] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 11/14/2016] [Indexed: 12/23/2022] Open
Abstract
Tolerance induced by morphine remains a major unresolved problem and significantly limits its clinical use. Recent evidences have indicated that dopamine D2 receptor (D2DR) is likely to be involved in morphine-induced antinociceptive tolerance. However, its exact effect and molecular mechanism remain unknown. In this study we examined the effect of D2DR on morphine antinociceptive tolerance in mice spinal cord. Chronic morphine treatment significantly increased levels of D2DR in mice spinal dorsal horn. And the immunoreactivity of D2DR was newly expressed in neurons rather than astrocytes or microglia both in vivo and in vitro. Blockade of D2DR with its antagonist (sulpiride and L-741,626, i.t.) attenuated morphine antinociceptive tolerance without affecting basal pain perception. Sulpiride (i.t.) also down-regulated the expression of phosphorylation of NR1, PKC, MAPKs and suppressed the activation of astrocytes and microglia induced by chronic morphine administration. Particularly, D2DR was found to interact with μ opioid receptor (MOR) in neurons, and chronic morphine treatment enhanced the MOR/D2DR interactions. Sulpiride (i.t.) could disrupt the MOR/D2DR interactions and attenuate morphine tolerance, indicating that neuronal D2DR in the spinal cord may be involved in morphine tolerance possibly by interacting with MOR. These results may present new opportunities for the treatment and management of morphine-induced antinociceptive tolerance which often observed in clinic.
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146
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Gunnarsson H, Grahn B, Agerström J. Impaired psychomotor ability and attention in patients with persistent pain: a cross-sectional comparative study. J Pain Res 2016; 9:825-835. [PMID: 27799814 PMCID: PMC5074707 DOI: 10.2147/jpr.s114915] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background and aims Patients with pain have shown cognitive impairment across various domains. Although the pain qualities vary among patients, research has overlooked how cognitive performance is affected by the duration and persistence of pain. The current study sought to fill this gap by examining how qualitatively different pain states relate to the following cognitive functions: sustained attention, cognitive control, and psychomotor ability. Patients and methods Patients with musculoskeletal pain in primary care were divided into three pain groups: acute pain (duration <3 months), regularly recurrent pain (duration >3 months), and persistent pain (duration >3 months). These groups were then compared with healthy controls. The MapCog Spectra Test, the Color Word Test, and the Grooved Pegboard Test were used to measure sustained attention, cognitive control, and psychomotor ability, respectively. Results Patients with persistent pain showed significantly worse sustained attention and psychomotor ability compared with healthy controls. The acute pain group showed a significant decrease in psychomotor ability, and the regularly recurrent pain group showed a significant decrease in sustained attention. These results remained unchanged when age, education, and medication were taken into account. Conclusion Persistent musculoskeletal pain seems to impair performance on a wider range of cognitive tasks than acute or regularly recurrent pain, using pain-free individuals as a benchmark. However, there is some evidence of impairment in psychomotor ability among patients with acute pain and some impairment in sustained attention among patients with regularly recurrent pain. Implications Caregivers may need to adjust communication methods when delivering information to cognitively impaired patients.
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Affiliation(s)
- Helena Gunnarsson
- Department of Psychology, Faculty of Health and Life Sciences, Linnaeus University, Vaxjo; Hälsoringen, Neron HSU AB, Osby
| | - Birgitta Grahn
- Department of Clinical Sciences Lund-Orthopedics, Lund University; Epidemiology and Register Centre South, Region Skåne, Lund; Department of Research and Development, Region Kronoberg, Vaxjo, Sweden
| | - Jens Agerström
- Department of Psychology, Faculty of Health and Life Sciences, Linnaeus University, Vaxjo
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147
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Greenwood MT. Dopamine Energetics and the Heart Center. Med Acupunct 2016. [DOI: 10.1089/acu.2016.1194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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148
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Liu P, Xing B, Chu Z, Liu F, Lei G, Zhu L, Gao Y, Chen T, Dang YH. Dopamine D3 receptor knockout mice exhibit abnormal nociception in a sex-different manner. J Neurosci Res 2016; 95:1438-1445. [PMID: 27716994 DOI: 10.1002/jnr.23952] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 08/19/2016] [Accepted: 09/06/2016] [Indexed: 01/11/2023]
Abstract
Pain is a complex and subjective experience. Previous studies have shown that mice lacking the dopamine D3 receptor (D3RKO) exhibit hypoalgesia, indicating a role of the D3 receptor in modulation of nociception. Given that there are sex differences in pain perception, there may be differences in responses to nociceptive stimuli between male and female D3RKO mice. In the current study, we examined the role of the D3 receptor in modulating nociception in male and female D3RKO mice. Acute thermal pain was modeled by hot-plate test. This test was performed at different temperatures including 52°C, 55°C, and 58°C. The von Frey hair test was applied to evaluate mechanical pain. And persistent pain produced by peripheral tissue injury and inflammation was modeled by formalin test. In the hot-plate test, compared with wild-type (WT) mice, D3RKO mice generally exhibited longer latencies at each of the three temperatures. Specially, male D3RKO mice showed hypoalgesia compared with male WT mice when the temperature was 55°C, while for the female mice, there was a statistical difference between genotypes when the test condition was 52°C. In the von Frey hair test, both male and female D3RKO mice exhibited hypoalgesia. In the formalin test, the male D3RKO mice displayed a similar nociceptive behavior as their sex-matched WT littermates, whereas significantly depressed late-phase formalin-induced nociceptive behaviors were observed in the female mutants. These findings indicated that the D3 receptor affects nociceptive behaviors in a sex-specific manner and that its absence induces more analgesic behavior in the female knockout mice. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Peng Liu
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Bo Xing
- Xi'an Mental Health Center, Xi'an, Shaanxi, PR China
| | - Zheng Chu
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Fei Liu
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.,Affiliated Stomatology Hospital of Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Gang Lei
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Li Zhu
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Ya Gao
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of the Health Ministry for Forensic Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Teng Chen
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of the Health Ministry for Forensic Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Yong-Hui Dang
- College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of the Health Ministry for Forensic Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China.,Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
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149
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Wang L, Zhang Y, Wang Z, Gong N, Kweon TD, Vo B, Wang C, Zhang X, Chung JY, Alachkar A, Liang X, Luo DZ, Civelli O. The Antinociceptive Properties of the Corydalis yanhusuo Extract. PLoS One 2016; 11:e0162875. [PMID: 27622550 PMCID: PMC5021270 DOI: 10.1371/journal.pone.0162875] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 08/27/2016] [Indexed: 11/19/2022] Open
Abstract
Corydalis yanhusuo. W.T. extracts (YHS) are widely used for the treatment of pain and inflammation. There are a few studies that assessed the effects of YHS in pain assays; however, none of these studies has systematically compared its activities in the different pain animal modes namely: acute, inflammatory and chronic pain. Furthermore, little is known about the mechanism of YHS activity in these assays. The aim of this study was to systematically evaluate the antinociceptive properties of YHS by testing it in four standardized pain assays and to investigate its mechanism. YHS antinociceptive properties were analyzed in the tail flick, the formalin paw licking, the von Frey filament and the hot box assays after spinal nerve ligation, which monitors acute nociceptive, persistent inflammatory and chronic neuropathic pain, respectively. YHS pharmacological profile was determined by screening it against a battery of G-protein coupled receptors and its mechanism of action was studied using knock-out mice. Our study shows that YHS, at a non-sedative dose, increases the tail flick latency in the tail flick assay without resulting in development of tolerance. YHS also decreases paw licking time in the formalin assay. Further, YHS increases paw withdraw threshold and latency in the von Frey filament and the hot box assays, respectively. In vitro, YHS exhibits prominent dopamine receptor antagonistic properties. In dopamine D2 receptor knockout mice, its antinociceptive effects are attenuated in acute and neuropathic pain but not inflammatory pain assays. Our results therefore indicate that YHS effectively attenuates acute, inflammatory and neuropathic pain, without causing tolerance. The effects on acute and neuropathic pain, but not inflammatory pain, are at least partially mediated through dopamine D2 receptor antagonism. Since YHS is a dietary supplement commercially available in the United States, our data suggest that it might be a candidate for alternative pain treatment.
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Affiliation(s)
- Lien Wang
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
| | - Yan Zhang
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
| | - Zhiwei Wang
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
| | - Nian Gong
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Irvine, California, United States of America
| | - Tae Dong Kweon
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Irvine, California, United States of America
| | - Benjamin Vo
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Irvine, California, United States of America
| | - Chaoran Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Xiuli Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Jae Yoon Chung
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
| | - Amal Alachkar
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
| | - Xinmiao Liang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - David Z. Luo
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Irvine, California, United States of America
| | - Olivier Civelli
- Department of Pharmacology, University of California Irvine, Irvine, California, United States of America
- Department of Pharmaceutical Sciences, University of California Irvine, Irvine, California, United States of America
- Developmental and Cell Biology, University of California Irvine, Irvine, California, United States of America
- * E-mail:
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Reward deficiency and anti-reward in pain chronification. Neurosci Biobehav Rev 2016; 68:282-297. [DOI: 10.1016/j.neubiorev.2016.05.033] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 12/12/2022]
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