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Davydov DM, de la Coba P, Contreras-Merino AM, Reyes Del Paso GA. Impact of homeostatic body hydration status, evaluated by hemodynamic measures, on different pain sensitization paths to a chronic pain syndrome. Sci Rep 2024; 14:1908. [PMID: 38253727 PMCID: PMC10803325 DOI: 10.1038/s41598-024-52419-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 01/18/2024] [Indexed: 01/24/2024] Open
Abstract
Contrasting findings on the mechanisms of chronic pain and hypertension development render the current conventional evidence of a negative relationship between blood pressure (BP) and pain severity insufficient for developing personalized treatments. In this interdisciplinary study, patients with fibromyalgia (FM) exhibiting clinically normal or elevated BP, alongside healthy participants were assessed. Different pain sensitization responses were evaluated using a dynamic 'slowly repeated evoked pain' (SREP) measure, as well as static pain pressure threshold and tolerance measures. Cardiovascular responses to clino-orthostatic (lying-standing) challenges were also examined as acute re- and de-hydration events, challenging cardiovascular and cerebrovascular homeostasis. These challenges involve compensating effects from various cardiac preload or afterload mechanisms associated with different homeostatic body hydration statuses. Additionally, hair cortisol concentration was considered as a factor with an impact on chronic hydration statuses. Pain windup (SREP) and lower pain threshold in FM patients were found to be related to BP rise during clinostatic (lying) rehydration or orthostatic (standing) dehydration events, respectively. These events were determined by acute systemic vasoconstriction (i.e., cardiac afterload response) overcompensating for clinostatic or orthostatic cardiac preload under-responses (low cardiac output or stroke volume). Lower pain tolerance was associated with tonic blood pressure reduction, determined by permanent hypovolemia (low stroke volume) decompensated by permanent systemic vasodilation. In conclusion, the body hydration status profiles assessed by (re)activity of systemic vascular resistance and effective blood volume-related measures can help predict the risk and intensity of different pain sensitization components in chronic pain syndrome, facilitating a more personalized management approach.
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Affiliation(s)
- Dmitry M Davydov
- María Zambrano Senior Scholar, University of Jaén, Campus Las Lagunillas s/n, 23071, Jaén, Spain.
- Laboratory of Neuroimmunopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Sciences, Moscow, Russia.
| | - Pablo de la Coba
- Department of Psychology, University of Extremadura, Badajoz, Spain
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2
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Hyung JW, Son BC. Generalized Extension of Referred Trigeminal Pain due to Greater Occipital Nerve Entrapment. Case Rep Neurol Med 2023; 2023:1099222. [PMID: 38025301 PMCID: PMC10657245 DOI: 10.1155/2023/1099222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/10/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
We report a very rare case of referred pain caused by greater occipital nerve (GON) entrapment, inducing spontaneous pain in the whole body as well as in the trigeminal nerve region of the face and head. It has already been reported that entrapment of the GON can induce referred pain in the ipsilateral limb as well as the ipsilateral hemiface. A 42-year-old female patient presented with chronic pain in her gums, jaw angle, submandibular region, retro-auricular suboccipital, and temporo-occipital vertex that had been ongoing for four years. As the patient's head pain and facial pain became severe, severe spontaneous pain occurred in the arm, waist, and both lower extremities. This patient's pain in the occipital and neck, spontaneous pain in the face, jaw, and whole body improved with decompression of the GON. Anatomical basis of pain referral to the facial trigeminal area caused by chronic GON entrapment is convergence of nociceptive inflow from high cervical C1-C3 structures and trigeminal orofacial area in the dorsal horn of the cervical spinal cord from the C2 segment up to the medullary dorsal horn (MDH). The major afferent contribution among the suboccipital and high cervical structure is mediated by spinal root C2 that is peripherally represented by the GON. Chronic noxious input from GON entrapment can cause sensitization and hypersensitivity in second order neurons in the trigeminocervical complex (TCC) and MDH in the caudal trigeminal nucleus and high cervical cord. Generalized extension of referred pain due to GON entrapment is thought to involve two possible pathophysiologies. One is the possibility that generalized pain is caused by sensitization of third-order nociceptive neurons in the thalamus. Another speculation is that spontaneous pain may occur throughout the body due to dysfunction of the descending brain stem pain-modulating pathway by sensitization and hyperexcitation of the MDH and trigeminal brainstem sensory nuclear complex (TBSNC).
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Affiliation(s)
- Jung-woo Hyung
- Department of Neurosurgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Byung-chul Son
- Department of Neurosurgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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3
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Beiner E, Lucas V, Reichert J, Buhai DV, Jesinghaus M, Vock S, Drusko A, Baumeister D, Eich W, Friederich HC, Tesarz J. Stress biomarkers in individuals with fibromyalgia syndrome: a systematic review with meta-analysis. Pain 2023; 164:1416-1427. [PMID: 36728497 DOI: 10.1097/j.pain.0000000000002857] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 11/25/2022] [Indexed: 02/03/2023]
Abstract
ABSTRACT Evidence suggests an involvement of hypothalamic-pituitary-adrenal (HPA) axis dysregulation in the development and maintenance of fibromyalgia syndrome (FMS). However, studies on the stress response via the HPA-axis in individuals with FMS show conflicting results. To better understand the relationship between FMS and HPA-axis dysregulation, we (1) systematically summarized the current level of evidence on HPA biomarkers in individuals with FMS compared with individuals without and (2) evaluated whether FMS is associated with a specific pattern of HPA dysregulation. The main outcome measures were cortisol, adrenocorticotropic hormone (ACTH), corticotropin-releasing hormone (CRH), epinephrine, and norepinephrine. A systematic search of MEDLINE, EMBASE, and PsychMed yielded 47 studies eligible for meta-analysis, including 1465 individuals with FMS and 1192 FMS-free controls. No main effect of FMS was found on altered levels of blood cortisol, ACTH, CRH, and epinephrine. Compared with controls, salivary and urinary cortisol levels were decreased in individuals with FMS, whereas blood levels of norepinephrine were increased. However, heterogeneity of data was high with significant evidence for publication bias. Overall, the data are compatible with association of FMS with adrenocortical hypofunction in the presence of increased sympathetic tone. However, the data are partially contradictory, so it must be assumed that the data are highly dependent on the respective study designs, patient samples, and analytical methods and do not necessarily demonstrate an abnormal HPA-axis function in FMS.
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Affiliation(s)
- Eva Beiner
- Department of General Internal Medicine and Psychosomatics, Medical Hospital, University of Heidelberg, Heidelberg, Germany
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4
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Xin M, Qu Y, Peng X, Zhu D, Cheng S. A systematic review and meta-analysis of voxel-based morphometric studies of fibromyalgia. Front Neurosci 2023; 17:1164145. [PMID: 37229427 PMCID: PMC10203234 DOI: 10.3389/fnins.2023.1164145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 04/17/2023] [Indexed: 05/27/2023] Open
Abstract
Objective Although neuroimaging investigations have revealed significant changes in brain structure in fibromyalgia (FM) patients, these findings are inconsistent. The current study conducted a systematic review and meta-analysis of voxel-based morphometric studies in order to comprehend those alterations in brain structure in FM patients. Methods Voxel-based morphometric (VBM) studies published up to January 17, 2023 were searched in the Web of Science, PubMed, EMBASE, Cochrane Library (CENTRAL), China National Knowledge Infrastructure (CNKI), Chongqing VIP, Wanfang Database. Two independent researchers carried out study screening, quality assessment, clinical data and neuroimaging data extraction. The whole-brain voxel-based gray matter (GM) data of FM patients were collected from eligible studies, and meta-analyzed using anisotropic effect size-signed differential mapping (AES-SDM). Results Twelve researches were included in this study, including 289 FM patients (mean age: 47.36 years) and 272 HS (mean age: 47.34 years). According to the meta-analysis, FM patients had increased GM in the right postcentral gyrus and left angular gyrus, and decreased GM in the right cingulate gyrus, right paracingulate gyrus, left cerebellum, and left gyrus rectus. Conclusion Our study suggests that fibromyalgia patients have altered gray matter in several brain regions that are involved in affective, cognitive functions, and in motor adaptations to pain processing.
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Affiliation(s)
- Ming Xin
- Geriatric Diseases Institute of Chengdu, Department of Rehabilitation, Chengdu Fifth People's Hospital (The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine), Chengdu, China
| | - Yuzhu Qu
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Acupuncture and Brain Research Center, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xingfu Peng
- Geriatric Diseases Institute of Chengdu, Department of Rehabilitation, Chengdu Fifth People's Hospital (The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine), Chengdu, China
| | - Deliang Zhu
- Geriatric Diseases Institute of Chengdu, Department of Rehabilitation, Chengdu Fifth People's Hospital (The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine), Chengdu, China
| | - Shirui Cheng
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Acupuncture and Brain Research Center, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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5
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Molero-Chamizo A, Nitsche MA, Barroso RTA, Bailén JRA, Palomeque JCG, Rivera-Urbina GN. Non-Invasive Electric and Magnetic Brain Stimulation for the Treatment of Fibromyalgia. Biomedicines 2023; 11:biomedicines11030954. [PMID: 36979932 PMCID: PMC10046115 DOI: 10.3390/biomedicines11030954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Although fibromyalgia is defined by its core muscular nociceptive component, it also includes multiple dysfunctions that involve the musculoskeletal, gastrointestinal, immune, endocrine, as well as the central and peripheral nervous systems, amongst others. The pathogenic involvement of the nervous system and the numerous neurological and neuroinflammatory symptoms of this disease may benefit from neuromodulatory stimulation techniques that have been shown to be effective and safe in diverse nervous system pathologies. In this systematic review, we outline current evidence showing the potential of non-invasive brain stimulation techniques, such as therapeutic strategies in fibromyalgia. In addition, we evaluate the contribution of these tools to the exploration of the neurophysiological characteristics of fibromyalgia. Considering that the pathogenesis of this disease is unknown, these approaches do not aim to causally treat this syndrome, but to significantly reduce a range of key symptoms and thus improve the quality of life of the patients.
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Affiliation(s)
- Andrés Molero-Chamizo
- Department of Clinical and Experimental Psychology, University of Huelva, Campus El Carmen, 21071 Huelva, Spain
| | - Michael A Nitsche
- Department of Psychology and Neurosciences, Leibniz Research Center for Working Environment and Human Factors, 44139 Dortmund, Germany
- University Clinic of Psychiatry and Psychotherapy and University Clinic of Child and Adolescent Psychiatry and Psychotherapy, Protestant Hospital of Bethel Foundation, University Hospital OWL, Bielefeld University, 33615 Bielefeld, Germany
| | | | - José R Alameda Bailén
- Department of Clinical and Experimental Psychology, University of Huelva, Campus El Carmen, 21071 Huelva, Spain
| | - Jesús Carlos García Palomeque
- Histology Department, School of Medicine, Cadiz University, 11001 Cádiz, Spain
- Cadiz Bahia Sur District, Andalusian Health Service, 11006 Cádiz, Spain
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6
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Holman A, Parikh N, Clauw DJ, Williams DA, Tapper EB. Contemporary management of pain in cirrhosis: Toward precision therapy for pain. Hepatology 2023; 77:290-304. [PMID: 35665522 PMCID: PMC9970025 DOI: 10.1002/hep.32598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 02/03/2023]
Abstract
Chronic pain is highly prevalent in patients with cirrhosis and is associated with poor health-related quality of life and poor functional status. However, there is limited guidance on appropriate pain management in this population, and pharmacologic treatment can be harmful, leading to adverse outcomes, such as gastrointestinal bleeding, renal injury, falls, and hepatic encephalopathy. Chronic pain can be categorized mechanistically into three pain types: nociceptive, neuropathic, and nociplastic, each responsive to different therapies. By discussing the identification, etiology, and treatment of these three mechanistic pain descriptors with a focus on specific challenges in patients with cirrhosis, we provide a framework for better tailoring treatments, including nonpharmacologic therapies, to patients' needs.
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Affiliation(s)
- Alexis Holman
- Division of Rheumatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Neehar Parikh
- Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Dan J. Clauw
- Chronic Pain and Fatigue Research Center, Anesthesiology Department, University of Michigan, Ann Arbor, Michigan, USA
| | - David A. Williams
- Chronic Pain and Fatigue Research Center, Anesthesiology Department, University of Michigan, Ann Arbor, Michigan, USA
| | - Elliot B. Tapper
- Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan, USA
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Augière T, Desjardins A, Paquette Raynard E, Brun C, Pinard AM, Simoneau M, Mercier C. Tactile Detection in Fibromyalgia: A Systematic Review and a Meta-Analysis. FRONTIERS IN PAIN RESEARCH 2021; 2:740897. [PMID: 35295451 PMCID: PMC8915638 DOI: 10.3389/fpain.2021.740897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/29/2021] [Indexed: 11/24/2022] Open
Abstract
Fibromyalgia is a chronic pain syndrome characterized by sensorimotor deficits and distortions of body representation, that could both be caused by alterations in sensory processing. Several studies suggest a hypersensitivity to various sensory stimulations in fibromyalgia but results on detection of both noxious and non-noxious tactile stimulation, which are particularly relevant for body representation and motor control, remain conflicting. Therefore, the aim of this study is to systematically review and quantify the detection thresholds to noxious and non-noxious tactile stimuli in individuals with fibromyalgia compared to pain-free controls. A systematic review and a meta-analysis were performed in the MEDLINE, EMBASE, CINAHL, Cochrane, PsycInfo and Web of Science databases using keywords related to fibromyalgia, tactile pain detection threshold, tactile detection threshold and quantitative sensory testing. Nineteen studies were included in the review, with 12 in the meta-analysis. Despite the heterogeneity of the results, the data from both the review and from the meta-analysis suggest a trend toward hyperalgesia and no difference of sensitivity to non-noxious tactile stimuli in participants with fibromyalgia compared to healthy controls. This contradicts the hypothesis of a general increase in responsiveness of the central nervous system to noxious and non-noxious stimulations in fibromyalgia. This study shows no alteration of the sensitivity to non-noxious tactile stimulation in fibromyalgia, suggesting that an altered unimodal processing is not sufficient to explain symptoms such as sensorimotor impairments and body representation distortions. Future research should investigate whether alterations in multisensory integration could contribute to these symptoms.
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Affiliation(s)
- Tania Augière
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
- Department of Rehabilitation, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Audrey Desjardins
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
- Department of Rehabilitation, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | | | - Clémentine Brun
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
| | - Anne Marie Pinard
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Martin Simoneau
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
- Department of Kinesiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Catherine Mercier
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, Quebec City, QC, Canada
- Department of Rehabilitation, Faculty of Medicine, Laval University, Quebec City, QC, Canada
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8
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Klein A, Schankin CJ. Visual snow syndrome, the spectrum of perceptual disorders, and migraine as a common risk factor: A narrative review. Headache 2021; 61:1306-1313. [PMID: 34570907 PMCID: PMC9293285 DOI: 10.1111/head.14213] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 08/06/2021] [Accepted: 08/19/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this narrative review is to explore the relationship between visual snow syndrome (VSS), migraine, and a group of other perceptual disorders. BACKGROUND VSS is characterized by visual snow and additional visual and nonvisual disturbances. The clinical picture suggests a hypersensitivity to internal and external stimuli. Imaging and electrophysiological findings indicate a hyperexcitability of the primary and secondary visual areas of the brain possibly due to an impairment of inhibitory feedback mechanisms. Migraine is the most frequent comorbidity. Epidemiological and clinical studies indicate that other perceptual disorders, such as tinnitus, fibromyalgia, and dizziness, are associated with VSS. Clinical overlaps and parallels in pathophysiology might exist in relation to migraine. METHODS We performed a PubMed and Google Scholar search with the following terms: visual snow syndrome, entoptic phenomenon, fibromyalgia, tinnitus, migraine, dizziness, persistent postural-perceptual dizziness (PPPD), comorbidities, symptoms, pathophysiology, thalamus, thalamocortical dysrhythmia, and salience network. RESULTS VSS, fibromyalgia, tinnitus, and PPPD share evidence of a central disturbance in the processing of different stimuli (visual, somatosensory/pain, acoustic, and vestibular) that might lead to hypersensitivity. Imaging and electrophysiological findings hint toward network disorders involving the sensory networks and other large-scale networks involved in the management of attention and emotional processing. There are clinical and epidemiological overlaps between these disorders. Similarly, migraine exhibits a multisensory hypersensitivity even in the interictal state with fluctuation during the migraine cycle. All the described perceptual disorders are associated with migraine suggesting that having migraine, that is, a disorder of sensory processing, is a common link. CONCLUSION VSS, PPPD, fibromyalgia, and chronic tinnitus might lie on a spectrum of perceptual disorders with similar pathophysiological mechanisms and the common risk factor migraine. Understanding the underlying network disturbances might give insights into how to improve these currently very difficult to treat conditions.
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Affiliation(s)
- Antonia Klein
- Department of NeurologyInselspitalBern University HospitalUniversity of BernBernSwitzerland
| | - Christoph J. Schankin
- Department of NeurologyInselspitalBern University HospitalUniversity of BernBernSwitzerland
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9
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Mercado F, Ferrera D, Fernandes-Magalhaes R, Peláez I, Barjola P. Altered sub-processes of working memory in fibromyalgia patients: An ERP study using N-back task. PAIN MEDICINE 2021; 23:475-487. [PMID: 34145889 DOI: 10.1093/pm/pnab190] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Cognitive dysfunction in fibromyalgia has become a key symptom considered by patients as more disabling than pain itself. Experimental evidence from neuropsychological and neuroimaging studies indicates that such cognitive impairments are especially robust when patients need to set in motion working memory processes, suggesting the existence of an altered functioning underlying the cerebral cortices of the frontoparietal memory network. However, the temporal dynamics of working memory sub-processes have not yet been explored in fibromyalgia. SUBJECTS Thirty-six right-handed women participated in the experiment: comprising eighteen patients with fibromyalgia and eighteen healthy controls. METHODS Event-related potentials (ERPs) and behavioural responses were recorded while participants were engaged in a 2-back working memory task. Principal Component Analyses (PCA) were used to define and quantify the ERP components associated with working memory processes. RESULTS Fibromyalgia patients exhibited worse performance than the control group, as revealed by their number of errors in the working memory task. Moreover, both scalp parieto-occipital P2 and parieto-occipital P3 amplitudes were lower for patients than for healthy control participants. Regression analyses revealed that lower P3 amplitudes were observed in those patients with fibromyalgia reporting higher pain ratings. CONCLUSIONS Current results suggest that both encoding of information (as reflected by P2) and subsequently, context updating and the replacement (as seen in lower P3 amplitudes), as a part of working memory sub-processes, are impaired in fibromyalgia. Studying the temporal dynamics of working memory using ERP methodology is a helpful approach to detect specific cognitive impaired mechanisms in this chronic pain syndrome. These new data could be used to develop more specific treatments adapted for each patient.
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Affiliation(s)
- Francisco Mercado
- Psychobiology Unit, School of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - David Ferrera
- Psychobiology Unit, School of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - Roberto Fernandes-Magalhaes
- Psychobiology Unit, School of Health Sciences, Rey Juan Carlos University, Madrid, Spain.,Clinical Foundation of the Rey Juan Carlos University, Madrid, Spain
| | - Irene Peláez
- Psychobiology Unit, School of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - Paloma Barjola
- Psychobiology Unit, School of Health Sciences, Rey Juan Carlos University, Madrid, Spain
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10
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Ansari AH, Pal A, Ramamurthy A, Kabat M, Jain S, Kumar S. Fibromyalgia Pain and Depression: An Update on the Role of Repetitive Transcranial Magnetic Stimulation. ACS Chem Neurosci 2021; 12:256-270. [PMID: 33397091 DOI: 10.1021/acschemneuro.0c00785] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Fibromyalgia is a musculoskeletal pain of different parts of the body, which is also associated with fatigue, lack of sleep, cognition deficits, family history, gender bias, and other disorders such as osteoarthritis and rheumatoid arthritis. It is generally initiated after trauma, surgery, infection, or stress. Fibromyalgia often coexists with several other conditions or disorders such as temporomandibular joint disorders, bowel and bladder syndrome, anxiety, depression, headaches, and interstitial cystitis. While there is no permanent cure for fibromyalgia, some interventions are available with multiple side effects. rTMS (repetitive transcranial magnetic stimulation), a noninvasive management strategy is used widely for various pain-related etiologies including fibromyalgia in both the laboratory and clinical settings. In this Review, we discuss the role and mechanism of action of rTMS in fibromyalgia patients and on associated comorbidities including anxiety, pain, depression, neurotransmitter alterations, sleep disorders, and overall quality of life of the patients suffering from this chronic problem. We also provide an update on the rTMS application in the clinical trials of fibromyalgia patients and prospective management therapy for multiple problems that these patients suffer.
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Affiliation(s)
- Abdul Haque Ansari
- Department of Physiology, College of Medicine, Texila American University, East Bank, Demerara, Guyana, South America
| | - Ajay Pal
- Department of Orthopedic Surgery, Movement Recovery Laboratory, Columbia University Medical Center, New York, New York 10032, United States
| | - Aditya Ramamurthy
- Department of Orthopedic Surgery, Movement Recovery Laboratory, Columbia University Medical Center, New York, New York 10032, United States
| | - Maciej Kabat
- Hackensack Meridian School of Medicine, Seton Hall University Interprofessional Health Sciences Campus, Kingsland Street, Nutley, New Jersey 07110, United States
| | - Suman Jain
- Department of Physiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Suneel Kumar
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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11
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Berger AA, Keefe J, Winnick A, Gilbert E, Eskander JP, Yazdi C, Kaye AD, Viswanath O, Urits I. Cannabis and cannabidiol (CBD) for the treatment of fibromyalgia. Best Pract Res Clin Anaesthesiol 2020; 34:617-631. [PMID: 33004171 DOI: 10.1016/j.bpa.2020.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/12/2020] [Indexed: 12/19/2022]
Abstract
Fibromyalgia is a complex disease process that is as prevalent as it is poorly understood. Research into the pathophysiology is ongoing, and findings will likely assist in identifying new therapeutic options to augment those in existence today that are still insufficient for the care of a large population of patients. Recent evidence describes the use of cannabinoids in the treatment of fibromyalgia. This study provides a systematic, thorough review of the evidence alongside a review of the seminal data regarding the pathophysiology, diagnosis, and current treatment options. Fibromyalgia is characterized by widespread chronic pain, fatigue, and depressive episodes without an organic diagnosis, which may be prevalent in up to 10% of the population and carries a significant cost in healthcare utilization, morbidity, a reduced quality of life, and productivity. It is frequently associated with psychiatric comorbidities. The diagnosis is clinical and usually prolonged, and diagnostic criteria continue to evolve. Some therapies have been previously described, including neuropathic medications, milnacipran, and antidepressants. Despite some level of efficacy, only physical exercise has strong evidence to support it. Cannabis has been used historically to treat different pain conditions since ancient times. Recent advances allowed for the isolation of the active substances in cannabis and the production of cannabinoid products that are nearly devoid of psychoactive influence and provide pain relief and alleviation of other symptoms. Many of these, as well as cannabis itself, are approved for use in chronic pain conditions. Evidence supporting cannabis in chronic pain conditions is plentiful; however, in fibromyalgia, they are mostly limited. Only a handful of randomized trials exists, and their objectivity has been questioned. However, many retrospective trials and patient surveys suggest the significant alleviation of pain, improvement in sleep, and abatement of associated symptoms. Evidence supporting the use of cannabis in chronic pain and specifically in fibromyalgia is being gathered as the use of cannabis increases with current global trends. While the current evidence is still limited, emerging data do suggest a positive effect of cannabis in fibromyalgia. Cannabis use is not without risks, including psychiatric, cognitive, and developmental as well as the risks of addiction. As such, clinical judgment is warranted to weigh these risks and prescribe to patients who are more likely to benefit from this treatment. Further research is required to define appropriate patient selection and treatment regimens.
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Affiliation(s)
- Amnon A Berger
- Beth Israel Deaconess Medical Center, Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Boston, MA, USA.
| | - Joseph Keefe
- Ben-Gurion University of the Negev Medical School for International Health, Beer-Sheva, Israel
| | - Ariel Winnick
- Ben-Gurion University of the Negev Medical School for International Health, Beer-Sheva, Israel
| | - Elasaf Gilbert
- Ben-Gurion University of the Negev Medical School for International Health, Beer-Sheva, Israel
| | - Jonathan P Eskander
- Portsmouth Anesthesia Associates, Anesthesiology and Pain Medicine, Portsmouth, VA, USA
| | - Cyrus Yazdi
- Beth Israel Deaconess Medical Center, Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Boston, MA, USA
| | - Alan D Kaye
- Louisiana State University Shreveport, Department of Anesthesiology, Shreveport, LA, USA
| | - Omar Viswanath
- Louisiana State University Shreveport, Department of Anesthesiology, Shreveport, LA, USA; University of Arizona College of Medicine - Phoenix, Department of Anesthesiology, Phoenix, AZ, USA; Creighton University School of Medicine, Department of Anesthesiology, Omaha, NE, USA; Valley Pain Consultants - Envision Physician Services, Phoenix, AZ, USA
| | - Ivan Urits
- Beth Israel Deaconess Medical Center, Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Boston, MA, USA
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12
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Littlejohn G, Guymer E. Key Milestones Contributing to the Understanding of the Mechanisms Underlying Fibromyalgia. Biomedicines 2020; 8:biomedicines8070223. [PMID: 32709082 PMCID: PMC7400313 DOI: 10.3390/biomedicines8070223] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/11/2020] [Accepted: 07/12/2020] [Indexed: 02/07/2023] Open
Abstract
The promulgation of the American College of Rheumatology (ACR) 1990 criteria for fibromyalgia (FM) classification has significantly contributed to an era of increased research into mechanisms that underlie the disorder. The previous emphasis on putative peripheral nociceptive mechanisms has advanced to identifying of changes in central neural networks that modulate pain and other sensory processes. The influences of psychosocial factors on the dynamic and complex neurobiological mechanisms involved in the fibromyalgia clinical phenotype are now better defined. This review highlights key milestones that have directed knowledge concerning the fundamental mechanisms contributing to fibromyalgia.
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Affiliation(s)
- Geoffrey Littlejohn
- Departments of Medicine, Monash University, Melbourne 3168, Australia;
- Departments of Rheumatology, Monash Health, Melbourne 3168, Australia
- Correspondence: ; Tel.: +61-3-95942575
| | - Emma Guymer
- Departments of Medicine, Monash University, Melbourne 3168, Australia;
- Departments of Rheumatology, Monash Health, Melbourne 3168, Australia
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Nascimento GC, Malzone BL, Iyomasa DM, Pereira YCL, Issa JPM, Leite-Panissi CRA, Watanabe IS, Iyomasa MM, Fuentes R, Del Bel E, Dias FJ. Beneficial effects of benzodiazepine on masticatory muscle dysfunction induced by chronic stress and occlusal instability in an experimental animal study. Sci Rep 2020; 10:8787. [PMID: 32472004 PMCID: PMC7260241 DOI: 10.1038/s41598-020-65524-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 04/07/2020] [Indexed: 11/09/2022] Open
Abstract
Psychological stress and occlusal alteration are important etiologic factors for temporomandibular/masticatory muscular disorders. In particular, the exact physiologic mechanism underlying the relation by occlusal alteration and temporomandibular disorders remains unclear. Our purpose was to test the hypothesis that benzodiazepine therapy is able to prevent metabolic and vascular changes in the medial pterygoid muscle of rats under chronic stress after 14 days of unilateral exodontia. Adult Wistar rats were submitted to unpredictable chronic mild stress (10 days) and/or unilateral exodontia and their plasma and medial pterygoid muscles were removed for analysis. A pre-treatment with diazepam was used to verify its effect on stress. The parameters evaluated included anxiety behavior, plasma levels of corticosterone, metabolic activity by succinate dehydrogenase, capillary density by laminin staining and ultrastructural findings by transmission electron microscopy. Occlusal instability induced anxiety-like behavior on elevated plus-maze test and diazepam administration blocked the appearance of this behavior. Unilateral exodontia promoted in the contralateral muscle an increase of oxidative fibers and capillaries and modification of sarcoplasmic reticulum. Chronic stress caused increased glycolytic metabolism, reduced capillary density and morphological changes in mitochondria on both sides. Association of both factors induced a glycolytic pattern in muscle and hemodynamic changes. Pharmacological manipulation with diazepam inhibited the changes in the medial pterygoid muscle after stress. Our results reveal a preventive benzodiazepine treatment for stress and occlusal instability conditions affecting masticatory muscle disorders. In addition, provide insights into the mechanisms by which chronic stress and exodontia might be involved in the pathophysiology of masticatory muscular dysfunctions.
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Affiliation(s)
- Glauce C Nascimento
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Bruno L Malzone
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Daniela M Iyomasa
- Department of Morphology, Presidente Prudente Medical School, Universidade do Oeste Paulista, Presidente Prudente, SP, Brazil
| | - Yamba C L Pereira
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - João Paulo M Issa
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Christie R A Leite-Panissi
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Ii-Sei Watanabe
- Department of Anatomy, Institute of Biomedical Sciences, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Mamie M Iyomasa
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Ramon Fuentes
- Department of Integral Dentistry, Research Centre for Dental Sciences (CICO), Dental School, Universidad de La Frontera, Temuco, Chile
| | - Elaine Del Bel
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | - Fernando J Dias
- Department of Integral Dentistry, Research Centre for Dental Sciences (CICO), Dental School, Universidad de La Frontera, Temuco, Chile.
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Price TJ, Gold MS. From Mechanism to Cure: Renewing the Goal to Eliminate the Disease of Pain. PAIN MEDICINE 2019; 19:1525-1549. [PMID: 29077871 DOI: 10.1093/pm/pnx108] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective Persistent pain causes untold misery worldwide and is a leading cause of disability. Despite its astonishing prevalence, pain is undertreated, at least in part because existing therapeutics are ineffective or cause intolerable side effects. In this review, we cover new findings about the neurobiology of pain and argue that all but the most transient forms of pain needed to avoid tissue damage should be approached as a disease where a cure can be the goal of all treatment plans, even if attaining this goal is not yet always possible. Design We reviewed the literature to highlight recent advances in the area of the neurobiology of pain. Results We discuss barriers that are currently hindering the achievement of this goal, as well as the development of new therapeutic strategies. We also discuss innovations in the field that are creating new opportunities to treat and even reverse persistent pain, some of which are in late-phase clinical trials. Conclusion We conclude that the confluence of new basic science discoveries and development of new technologies are creating a path toward pain therapeutics that should offer significant hope of a cure for patients and practitioners alike. Classification of Evidence. Our review points to new areas of inquiry for the pain field to advance the goal of developing new therapeutics to treat chronic pain.
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Affiliation(s)
- Theodore J Price
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, Texas
| | - Michael S Gold
- Department of Neurobiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Kringel D, Kaunisto MA, Lippmann C, Kalso E, Lötsch J. Development of an AmpliSeq TM Panel for Next-Generation Sequencing of a Set of Genetic Predictors of Persisting Pain. Front Pharmacol 2018; 9:1008. [PMID: 30283335 PMCID: PMC6156278 DOI: 10.3389/fphar.2018.01008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/17/2018] [Indexed: 12/21/2022] Open
Abstract
Background: Many gene variants modulate the individual perception of pain and possibly also its persistence. The limited selection of single functional variants is increasingly being replaced by analyses of the full coding and regulatory sequences of pain-relevant genes accessible by means of next generation sequencing (NGS). Methods: An NGS panel was created for a set of 77 human genes selected following different lines of evidence supporting their role in persisting pain. To address the role of these candidate genes, we established a sequencing assay based on a custom AmpliSeqTM panel to assess the exomic sequences in 72 subjects of Caucasian ethnicity. To identify the systems biology of the genes, the biological functions associated with these genes were assessed by means of a computational over-representation analysis. Results: Sequencing generated a median of 2.85 ⋅ 106 reads per run with a mean depth close to 200 reads, mean read length of 205 called bases and an average chip loading of 71%. A total of 3,185 genetic variants were called. A computational functional genomics analysis indicated that the proposed NGS gene panel covers biological processes identified previously as characterizing the functional genomics of persisting pain. Conclusion: Results of the NGS assay suggested that the produced nucleotide sequences are comparable to those earned with the classical Sanger sequencing technique. The assay is applicable for small to large-scale experimental setups to target the accessing of information about any nucleotide within the addressed genes in a study cohort.
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Affiliation(s)
- Dario Kringel
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany
| | - Mari A Kaunisto
- Institute for Molecular Medicine Finland, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Catharina Lippmann
- Fraunhofer Institute for Molecular Biology and Applied Ecology - Project Group Translational Medicine and Pharmacology, Frankfurt, Germany
| | - Eija Kalso
- Division of Pain Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jörn Lötsch
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany.,Fraunhofer Institute for Molecular Biology and Applied Ecology - Project Group Translational Medicine and Pharmacology, Frankfurt, Germany
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Cheng CW, Wong CS, Hui GK, Chung EK, Wong SH. Fibromyalgia: is it a neuropathic pain? Pain Manag 2018; 8:377-388. [PMID: 30212264 DOI: 10.2217/pmt-2018-0024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Fibromyalgia is a chronic pain syndrome of unclear pathophysiology. It is believed to be a dysfunction of the CNS, but no definite structural lesion has been identified so far. Despite a number of changes in the diagnostic criteria, diagnosis remains a clinical one. Since the 2011 revision of the IASP definition of neuropathic pain, fibromyalgia has been excluded from the diagnosis of neuropathic pain. More recent studies however found newer evidences of pathophysiology including small fiber neuropathy in patients with fibromyalgia. This may challenge the existing consensus and have implications on future diagnosis and management of this condition.
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Affiliation(s)
| | - Clara Sm Wong
- Department of Anaesthesiology, Queen Elizabeth Hospital, Hong Kong
| | - Grace Km Hui
- Department of Anaesthesiology, Queen Elizabeth Hospital, Hong Kong
| | - Edmond Kn Chung
- Department of Anaesthesiology, Queen Elizabeth Hospital, Hong Kong
| | - Steven Hs Wong
- Department of Anaesthesiology, Queen Elizabeth Hospital, Hong Kong
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Yavne Y, Amital D, Watad A, Tiosano S, Amital H. A systematic review of precipitating physical and psychological traumatic events in the development of fibromyalgia. Semin Arthritis Rheum 2018; 48:121-133. [DOI: 10.1016/j.semarthrit.2017.12.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 11/11/2017] [Accepted: 12/09/2017] [Indexed: 01/09/2023]
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Yılmaz E, Tamam L. Attention-deficit hyperactivity disorder and impulsivity in female patients with fibromyalgia. Neuropsychiatr Dis Treat 2018; 14:1883-1889. [PMID: 30100723 PMCID: PMC6063452 DOI: 10.2147/ndt.s159312] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
OBJECTIVE Data which indicate a greater role of the central nervous system in the etiology of fibromyalgia are increasing. The goal of the present study is to determine the link between fibromyalgia and attention-deficit hyperactivity disorder (ADHD) and, in addition, to reveal the relevance of impulsivity dimension. METHODS The study included 78 females with fibromyalgia who applied to a physical medicine and rehabilitation polyclinic in Ceyhan State Hospital and 54 healthy females. The diagnosis of fibromyalgia was made by an experienced specialist of physical medicine and rehabilitation based on the American Rheumatology Association Diagnostic Criteria (2010). The diagnosis of ADHD was by an experienced psychiatrist using Diagnostic and Statistical Manual of Mental Disorders-5. The following inventories were used: adult ADHD self-report scale, Wender Utah rating scale, and Barratt impulsivity scale short form. RESULTS Adult ADHD was detected in 29.5% of the fibromyalgia group and 7.4% of the control group; childhood and adolescent attention hyperactivity disorder ratios in these groups were 33.3% and 11.1%, respectively. The differences were statistically significant (P=0.002, P=0.003). Scores of the fibromyalgia group on the Wender Utah rating scale, adult ADHD self-report scale, attention subscale, hyperactivity-impulsivity subscale, and the Barratt impulsivity scale for non-planning and attentional impulsivity were found to be significantly higher than the control group (P<0.05, P<0.01, P<0.01, P<0.05, P<0.01, P<0.05, respectively). CONCLUSION The present study has shown that both adult and childhood ADHD are quite common in female fibromyalgia patients. There was a link between fibromyalgia and impulsivity. Certain subtypes of fibromyalgia and attention-deficit hyperactivity deficit disorder could be sharing the common etiological pathways.
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Affiliation(s)
- Ertan Yılmaz
- Department of Psychiatry, Ceyhan State Hospital, Adana, Turkey,
| | - Lut Tamam
- Department of Psychiatry, Faculty of Medicine, Cukurova University, Adana, Turkey
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Wolfe F, Walitt B, Rasker JJ, Häuser W. Primary and Secondary Fibromyalgia Are The Same: The Universality of Polysymptomatic Distress. J Rheumatol 2018; 46:204-212. [PMID: 30008459 DOI: 10.3899/jrheum.180083] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2018] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Polysymptomatic distress (PSD) is the underlying metric of fibromyalgia (FM), and levels of PSD can identify criteria-positive FM with > 90% accuracy. We used levels of the PSD scale to test whether symptom levels in primary FM (PFM) and secondary FM (SFM) were the same and whether symptoms were equivalent in persons not meeting FM criteria. METHODS We studied 1525 patients with a clinical diagnosis of FM and 12,037 patients with rheumatoid arthritis (RA). We used regression models to compare patients with potential and actual PFM to RA patients with potential and actual SFM for 17 key clinical variables. RESULTS When controlled for PSD values, the widespread pain index, symptom severity scale, and pain, global, quality of life, and physical and mental component scores were essentially the same or only slightly different in PFM and SFM. Health Assessment Questionnaire-Disability Index scores were slightly higher in SFM (0.21 units), as was the painful joint count (1.6 joints). Overall, higher PSD scores were associated with more severe symptoms or abnormal status. PSD scores in patients not satisfying FM criteria and in patients satisfying criteria operated similarly. CONCLUSION PFM and SFM are equivalent regarding symptom burden. PSD scores are more informative about severity and severity within diagnosis than dichotomization into FM/non-FM. Studies of FM versus "healthy individuals," or FM versus other diseases, are inherently defective, while studies of FM and PSD in RA offer the opportunity to have meaningful comparison groups, because there are no readily available unbiased appropriate controls for PFM.
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Affiliation(s)
- Frederick Wolfe
- From the National Data Bank for Rheumatic Diseases; University of Kansas School of Medicine, Wichita, Kansas; US National Institute of Nursing Research, National Institutes of Health (NIH), Bethesda, Maryland, USA; Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente, Enschede, the Netherlands; Department of Internal Medicine 1, Klinikum Saarbrücken, Saarbrücken; Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München, Munich, Germany. .,F. Wolfe, MD, National Data Bank for Rheumatic Diseases, Wichita, and University of Kansas School of Medicine; B. Walitt, MD, PhD, National Institute of Nursing Research, NIH; J.J. Rasker, MD, Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente; W. Häuser, MD, Department of Internal Medicine 1, Klinikum Saarbrücken, and Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München.
| | - Brian Walitt
- From the National Data Bank for Rheumatic Diseases; University of Kansas School of Medicine, Wichita, Kansas; US National Institute of Nursing Research, National Institutes of Health (NIH), Bethesda, Maryland, USA; Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente, Enschede, the Netherlands; Department of Internal Medicine 1, Klinikum Saarbrücken, Saarbrücken; Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München, Munich, Germany.,F. Wolfe, MD, National Data Bank for Rheumatic Diseases, Wichita, and University of Kansas School of Medicine; B. Walitt, MD, PhD, National Institute of Nursing Research, NIH; J.J. Rasker, MD, Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente; W. Häuser, MD, Department of Internal Medicine 1, Klinikum Saarbrücken, and Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München
| | - Johannes J Rasker
- From the National Data Bank for Rheumatic Diseases; University of Kansas School of Medicine, Wichita, Kansas; US National Institute of Nursing Research, National Institutes of Health (NIH), Bethesda, Maryland, USA; Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente, Enschede, the Netherlands; Department of Internal Medicine 1, Klinikum Saarbrücken, Saarbrücken; Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München, Munich, Germany.,F. Wolfe, MD, National Data Bank for Rheumatic Diseases, Wichita, and University of Kansas School of Medicine; B. Walitt, MD, PhD, National Institute of Nursing Research, NIH; J.J. Rasker, MD, Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente; W. Häuser, MD, Department of Internal Medicine 1, Klinikum Saarbrücken, and Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München
| | - Winfried Häuser
- From the National Data Bank for Rheumatic Diseases; University of Kansas School of Medicine, Wichita, Kansas; US National Institute of Nursing Research, National Institutes of Health (NIH), Bethesda, Maryland, USA; Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente, Enschede, the Netherlands; Department of Internal Medicine 1, Klinikum Saarbrücken, Saarbrücken; Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München, Munich, Germany.,F. Wolfe, MD, National Data Bank for Rheumatic Diseases, Wichita, and University of Kansas School of Medicine; B. Walitt, MD, PhD, National Institute of Nursing Research, NIH; J.J. Rasker, MD, Faculty of Behavioral Management and Social Sciences, Psychology, Health and Technology, University of Twente; W. Häuser, MD, Department of Internal Medicine 1, Klinikum Saarbrücken, and Department of Psychosomatic Medicine and Psychotherapy, Technische Universität München
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Affiliation(s)
- Steven E. Harte
- Department of Anesthesiology Chronic Pain and Fatigue Research Center University of Michigan Ann Arbor Michigan
| | - Richard E. Harris
- Department of Anesthesiology Chronic Pain and Fatigue Research Center University of Michigan Ann Arbor Michigan
| | - Daniel J. Clauw
- Department of Anesthesiology Chronic Pain and Fatigue Research Center University of Michigan Ann Arbor Michigan
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21
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Fernández RAR, Pereira YCL, Iyomasa DM, Calzzani RA, Leite-Panissi CRA, Iyomasa MM, Nascimento GC. Metabolic and vascular pattern in medial pterygoid muscle is altered by chronic stress in an animal model of hypodontia. Physiol Behav 2017; 185:70-78. [PMID: 29275100 DOI: 10.1016/j.physbeh.2017.12.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/06/2017] [Accepted: 12/20/2017] [Indexed: 02/07/2023]
Abstract
Psychological stress is an important perpetuating, worsening and risk factor for temporomandibular disorders of muscular or articular origin. Occlusion instability, by the way, is considered a risk factor of this pathology and can be reproduced in some experimental animal models. The exact physiologic mechanism underlying these relations however, remains unclear. Our purpose was to test the hypothesis that chronic stress and unilateral exodontia induce metabolic and vascular changes in the medial pterygoid muscle of rats. Adult Wistar rats were submitted to chronic unpredictable stress and/or unilateral exodontia and their plasma and medial pterygoid muscle were removed for analysis. The parameters evaluated included plasma levels of corticosterone, metabolic activity by succinate dehydrogenase, oxidative capacity by nicotinamide adenine dinucleotide diaphorase, capillary density by laminin and alfa-CD staining and reactive oxidative species production. Chronic unpredictable stress as an isolated factor, increased oxidative metabolism, capillary density and reactive oxygen species production at medial pterygoid muscle. Conversely, exodontia has a main effect in metabolism, promoting glycolytic transformation of muscle fibers. Association of both factors induced a major glycolytic pattern in muscle and vascular changes. Our findings provide insights into the mechanisms, possibly inducing metabolic and vascular alterations on medial pterygoid muscle of rats, by which chronic stress and occlusal instabilities might be involved as risk factors in the pathophysiology of temporomandibular disorders with muscular components.
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Affiliation(s)
- Rodrigo Alberto Restrepo Fernández
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Yamba Carla Lara Pereira
- Biology Dental Buco Graduate Program, School of Dentistry of Piracicaba, University of Campinas, Piracicaba 13414-903, SP, Brazil
| | - Daniela Mizusaki Iyomasa
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Ricardo Alexandre Calzzani
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Christie Ramos Andrade Leite-Panissi
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil; Psychobiology Graduate Program, School of Philosophy, Science and Literature of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-901, SP, Brazil
| | - Mamie Mizusaki Iyomasa
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Glauce Crivelaro Nascimento
- Department of Morphology, Physiology and Basic Pathology, Ribeirão Preto Dentistry Faculty, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil.
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22
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Khalid S, Simonds E, Loukas M, Tubbs RS. The clinical anatomy of fibromyalgia. Clin Anat 2017; 31:387-391. [PMID: 29197121 DOI: 10.1002/ca.23029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 12/25/2022]
Abstract
Fibromyalgia is a disorder characterized by pain and a spectrum of psychological comorbidities, rendering treatment difficult, and often a financial burden. Findings regarding diagnosis, prevalence, comorbidities, and potential pathophysiological links are discussed herein. Fibromyalgia is a complex disorder and there are specific criteria that patients must meet for diagnosis, including scores on fibromyalgia questionnaires, commonalities of age, gender, menopause status, sleep disturbances, and mood symptoms. The close relationship between fibromyalgia and other chronic disorders should alert the physician to explore for comorbid illnesses. In this review of the clinical anatomy of fibromyalgia, we review new studies that could be significant for the current use of clinical interventions for patients with symptoms. Using standard search engines, the clinical anatomy of fibromyalgia is investigated and many related studies are mentioned herein. Fibromyalgia is considered a prototypical central chronic pain syndrome and is associated with widespread pain that fluctuates spontaneously. There is also substantial lifetime psychiatric comorbidity in individuals with fibromyalgia, resulting in a low health-related quality of life. These results have important clinical and theoretical implications, including the possibility that fibromyalgia could share underlying pathophysiological links with some psychiatric disorders. This reveals that patients with fibromyalgia have findings compatible with tissue injury pain, the pain mechanisms involving both the primary afferent neuron and the nociceptive systems in the central nervous system. (1) There is a relationship between fibromyalgia and chronic disorders. This should alert the physician to explore for comorbid illnesses. (2) There is substantial lifetime psychiatric comorbidity resulting in a low health-related quality of life. (3) Patients with fibromyalgia have findings compatible with tissue injury pain Clin. Anat. 31:387-391, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Shehzad Khalid
- Department of Anatomical Sciences, St. George's University, St. George's, Grenada.,Seattle Science Foundation, Seattle, Washington
| | | | - Marios Loukas
- Department of Anatomical Sciences, St. George's University, St. George's, Grenada
| | - R Shane Tubbs
- Department of Anatomical Sciences, St. George's University, St. George's, Grenada.,Seattle Science Foundation, Seattle, Washington
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Decreased olfactory bulb volumes in patients with fibromyalgia syndrome. Clin Rheumatol 2017; 36:2821-2824. [PMID: 28744789 DOI: 10.1007/s10067-017-3772-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 07/11/2017] [Accepted: 07/18/2017] [Indexed: 12/29/2022]
Abstract
Among the other symptoms, impaired olfactory function such as odor identification, threshold, and discrimination have been reported in patients with fibromyalgia syndrome (FMS). To investigate olfactory bulb (OB) volumes in FMS, by using magnetic resonance imaging (MRI), and to make reasonable suggestions are the goals of the present study. The study included 62 individuals as the FMS group (n = 30) and the control group (n = 32). MRI examinations were performed by a 1.5-T scanner and a standard head coil was used for the images. The coronal T2-weighted images were used for to measure OB volumes. Right, left, and total OB volumes were calculated with the aid of these images. The mean age of the FMS group was 44.2 ± 8.3 years and the control group was 41.7 ± 3.53 years. The mean volume of the right OB was 74.9 ± 12.4 mm3 in the FMS group and was 92.6 ± 12.9 mm3 in the control group. The mean value of the left OB volume was 74.3 ± 10.8 mm3 in the FMS group and 92.8 ± 12.6 mm3 in the control group. The mean of the total OB volume was 146.6 ± 20.81 mm3 in the FMS group and 186.5 ± 23.5 mm3 in the control group. Left, right, and total OB volumes were significantly lower in the FMS group than in the control group (all p < 0.05). Female patients with FMS are under the risk of the decreased olfactory bulb volumes. This situation should be kept in mind for proper and reasonable management of this tough syndrome.
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Histological Underpinnings of Grey Matter Changes in Fibromyalgia Investigated Using Multimodal Brain Imaging. J Neurosci 2016; 37:1090-1101. [PMID: 27986927 DOI: 10.1523/jneurosci.2619-16.2016] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/24/2016] [Accepted: 12/05/2016] [Indexed: 12/14/2022] Open
Abstract
Chronic pain patients present with cortical gray matter alterations, observed with anatomical magnetic resonance (MR) imaging. Reduced regional gray matter volumes are often interpreted to reflect neurodegeneration, but studies investigating the cellular origin of gray matter changes are lacking. We used multimodal imaging to compare 26 postmenopausal women with fibromyalgia with 25 healthy controls (age range: 50-75 years) to test whether regional gray matter volume decreases in chronic pain are associated with compromised neuronal integrity. Regional gray matter decreases were largely explained by T1 relaxation times in gray matter, a surrogate measure of water content, and not to any substantial degree by GABAA receptor concentration, an indirect marker of neuronal integrity measured with [18F] flumazenil PET. In addition, the MR spectroscopy marker of neuronal viability, N-acetylaspartate, did not differ between patients and controls. These findings suggest that decreased gray matter volumes are not explained by compromised neuronal integrity. Alternatively, a decrease in neuronal matter could be compensated for by an upregulation of GABAA receptors. The relation between regional gray matter and T1 relaxation times suggests decreased tissue water content underlying regional gray matter decreases. In contrast, regional gray matter increases were explained by GABAA receptor concentration in addition to T1 relaxation times, indicating perhaps increased neuronal matter or GABAA receptor upregulation and inflammatory edema. By providing information on the histological origins of cerebral gray matter alterations in fibromyalgia, this study advances the understanding of the neurobiology of chronic widespread pain. SIGNIFICANCE STATEMENT Regional gray matter alterations in chronic pain, as detected with voxel-based morphometry of anatomical magnetic resonance images, are commonly interpreted to reflect neurodegeneration, but this assumption has not been tested. We found decreased gray matter in fibromyalgia to be associated with T1 relaxation times, a surrogate marker of water content, but not with GABAA receptor concentration, a surrogate of neuronal integrity. In contrast, regional gray matter increases were partly explained by GABAA receptor concentration, indicating some form of neuronal plasticity. The study emphasizes that voxel-based morphometry is an exploratory measure, demonstrating the need to investigate the histological origin of gray matter alterations for every distinct clinical entity, and advances the understanding of the neurobiology of chronic (widespread) pain.
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Nicol AL, Sieberg CB, Clauw DJ, Hassett AL, Moser SE, Brummett CM. The Association Between a History of Lifetime Traumatic Events and Pain Severity, Physical Function, and Affective Distress in Patients With Chronic Pain. THE JOURNAL OF PAIN 2016; 17:1334-1348. [DOI: 10.1016/j.jpain.2016.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 10/21/2022]
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Gracely RH, Schweinhardt P. Programmed symptoms: disparate effects united by purpose. Curr Rheumatol Rev 2016; 11:116-30. [PMID: 26088212 PMCID: PMC4997946 DOI: 10.2174/1573397111666150619095125] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/14/2015] [Accepted: 06/17/2015] [Indexed: 01/23/2023]
Abstract
Central sensitivity syndromes (CSS) share features of similar multiple symptoms, virtually unknown mechanisms and lack of effective treatments. The CSS nomenclature was chosen over alternatives because it focused on a putative physiological mechanism of central sensitization common to disorders such as fibromyalgia, irritable bowel syndrome, vulvodynia and temporomandibular disorder. Increasing evidence from multiple biological systems suggests a further development. In this new model central sensitization is part of a ensemble that includes also the symptoms of widespread pain, fatigue, unrefreshing sleep and dyscognition. The main feature is an intrinsic program that produces this ensemble to guide behavior to restore normal function in conditions that threaten survival. The well known “illness response” is a classic example that is triggered in response to the specific threat of viral infection. The major leap for this model in the context of CSS is that the symptom complex is not a reactive result of pathology, but a purposeful feeling state enlisted to combat pathology. Once triggered, this state is produced by potential mechanisms that likely include contributions of the peripheral and central immune systems, as well as stress response systems such as the autonomic system and the hypothalamic–pituitary–adrenal (HPA) axis. These act in concert to alter behavior in a beneficial direction. This concept explains similar symptoms for many triggering conditions, the poorly understood pathology, and the resistance to treatment.
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Affiliation(s)
- Richard H Gracely
- Center for Pain Research and Innovation, Koury Oral Health Sciences, CB #7455, Chapel Hill, NC 27599, USA.
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Augmented Pain Processing in Primary and Secondary Somatosensory Cortex in Fibromyalgia: A Magnetoencephalography Study Using Intra-Epidermal Electrical Stimulation. PLoS One 2016; 11:e0151776. [PMID: 26992095 PMCID: PMC4798786 DOI: 10.1371/journal.pone.0151776] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 03/03/2016] [Indexed: 11/19/2022] Open
Abstract
The aim of this study was to investigate augmented pain processing in the cortical somatosensory system in patients with fibromyalgia (FM). Cortical evoked responses were recorded in FM (n = 19) and healthy subjects (n = 21) using magnetoencephalography after noxious intra-epidermal electrical stimulation (IES) of the hand dorsum (pain rating 6 on a numeric rating scale, perceptually-equivalent). In addition, healthy subjects were stimulated using the amplitude corresponding to the average stimulus intensity rated 6 in patients with FM (intensity-equivalent). Quantitative sensory testing was performed on the hand dorsum or thenar muscle (neutral site) and over the trapezius muscle (tender point), using IES (thresholds, ratings, temporal summation of pain, stimulus-response curve) and mechanical stimuli (threshold, ratings). Increased amplitude of cortical responses was found in patients with FM as compared to healthy subjects. These included the contralateral primary (S1) and bilateral secondary somatosensory cortices (S2) in response to intensity-equivalent stimuli and the contralateral S1 and S2 in response to perceptually-equivalent stimuli. The amplitude of the contralateral S2 response in patients with FM was positively correlated with average pain intensity over the last week. Quantitative sensory testing results showed that patients with FM were more sensitive to painful IES as well as to mechanical stimulation, regardless of whether the stimulation site was the hand or the trapezius muscle. Interestingly, the slope of the stimulus-response relationship as well as temporal summation of pain in response to IES was not different between groups. Together, these results suggest that the observed pain augmentation in response to IES in patients with FM could be due to sensitization or disinhibition of the cortical somatosensory system. Since the S2 has been shown to play a role in higher-order functions, further studies are needed to clarify the role of augmented S2 response in clinical characteristics of FM.
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Touch Perception Altered by Chronic Pain and by Opioid Blockade. eNeuro 2016; 3:eN-NWR-0138-15. [PMID: 27022625 PMCID: PMC4785385 DOI: 10.1523/eneuro.0138-15.2016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 02/09/2016] [Accepted: 02/22/2016] [Indexed: 12/01/2022] Open
Abstract
Touch plays a significant role in human social behavior and social communication, and its rewarding nature has been suggested to involve opioids. Opioid blockade in monkeys leads to increased solicitation and receipt of grooming, suggesting heightened enjoyment of touch. We sought to study the role of endogenous opioids in perception of affective touch in healthy adults and in patients with fibromyalgia, a chronic pain condition shown to involve reduced opioid receptor availability. The pleasantness of touch has been linked to the activation of C-tactile fibers, which respond maximally to slow gentle touch and correlate with ratings of pleasantness. We administered naloxone to patients and healthy controls to directly observe the consequences of µ-opioid blockade on the perceived pleasantness and intensity of touch. We found that at baseline chronic pain patients showed a blunted distinction between slow and fast brushing for both intensity and pleasantness, suggesting reduced C-tactile touch processing. In addition, we found a differential effect of opioid blockade on touch perception in healthy subjects and pain patients. In healthy individuals, opioid blockade showed a trend toward increased ratings of touch pleasantness, while in chronic pain patients it significantly decreased ratings of touch intensity. Further, in healthy individuals, naloxone-induced increase in touch pleasantness was associated with naloxone-induced decreased preference for slow touch, suggesting a possible effect of opioid levels on processing of C-tactile fiber input. These findings suggest a role for endogenous opioids in touch processing, and provide further evidence for altered opioid functioning in chronic pain patients.
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Pereira MP, Donahue RR, Dahl JB, Werner M, Taylor BK, Werner MU. Endogenous Opioid-Masked Latent Pain Sensitization: Studies from Mouse to Human. PLoS One 2015; 10:e0134441. [PMID: 26305798 PMCID: PMC4549112 DOI: 10.1371/journal.pone.0134441] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 06/08/2015] [Indexed: 01/20/2023] Open
Abstract
Following the resolution of a severe inflammatory injury in rodents, administration of mu-opioid receptor inverse agonists leads to reinstatement of pain hypersensitivity. The mechanisms underlying this form of latent pain sensitization (LS) likely contribute to the development of chronic pain, but LS has not yet been demonstrated in humans. Using a C57BL/6 mouse model of cutaneous mild heat injury (MHI) we demonstrated a dose-dependent reinstatement of pain sensitization, assessed as primary (P < 0.001) and secondary hyperalgesia (P < 0.001) by naloxone (0.3–10 mg/kg), 168 hrs after the induction of MHI. Forward-translating the dose data to a human MHI model (n = 12) we could show that LS does indeed occur after naloxone 2 mg/kg, 168 hrs after a MHI. Our previous unsuccessful efforts to demonstrate unmasking of LS in humans are thus likely explained by an insufficient naloxone dose (0.021 mg/kg). However, while LS was consistently demonstrated in 21/24 mice, LS was only seen in 4/12 subjects. This difference is likely due to selection bias since the C57BL/6 mouse strain exhibits markedly enhanced pain sensitivity in assays of acute thermal nociception. Future exploratory studies in humans should prioritize inclusion of “high-sensitizers” prone to develop LS and use post-surgical models to elucidate markers of vulnerability to chronic postsurgical pain.
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Affiliation(s)
- Manuel P. Pereira
- Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, Copenhagen, Denmark
| | - Renee R. Donahue
- Department of Physiology, University of Kentucky, Lexington, KY, United States of America
| | - Jørgen B. Dahl
- Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, Copenhagen, Denmark
| | - Marianne Werner
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | - Bradley K. Taylor
- Multidisciplinary Pain Center, Neuroscience Center, Rigshospitalet, Copenhagen, Denmark
| | - Mads U. Werner
- Multidisciplinary Pain Center, Neuroscience Center, Rigshospitalet, Copenhagen, Denmark
- * E-mail:
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Werner MU, Pereira MP, Andersen LPH, Dahl JB. Endogenous opioid antagonism in physiological experimental pain models: a systematic review. PLoS One 2015; 10:e0125887. [PMID: 26029906 PMCID: PMC4452333 DOI: 10.1371/journal.pone.0125887] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 03/23/2015] [Indexed: 12/11/2022] Open
Abstract
Opioid antagonists are pharmacological tools applied as an indirect measure to detect activation of the endogenous opioid system (EOS) in experimental pain models. The objective of this systematic review was to examine the effect of mu-opioid-receptor (MOR) antagonists in placebo-controlled, double-blind studies using ʻinhibitoryʼ or ʻsensitizingʼ, physiological test paradigms in healthy human subjects. The databases PubMed and Embase were searched according to predefined criteria. Out of a total of 2,142 records, 63 studies (1,477 subjects [male/female ratio = 1.5]) were considered relevant. Twenty-five studies utilized ʻinhibitoryʼ test paradigms (ITP) and 38 studies utilized ʻsensitizingʼ test paradigms (STP). The ITP-studies were characterized as conditioning modulation models (22 studies) and repetitive transcranial magnetic stimulation models (rTMS; 3 studies), and, the STP-studies as secondary hyperalgesia models (6 studies), ʻpainʼ models (25 studies), summation models (2 studies), nociceptive reflex models (3 studies) and miscellaneous models (2 studies). A consistent reversal of analgesia by a MOR-antagonist was demonstrated in 10 of the 25 ITP-studies, including stress-induced analgesia and rTMS. In the remaining 14 conditioning modulation studies either absence of effects or ambiguous effects by MOR-antagonists, were observed. In the STP-studies, no effect of the opioid-blockade could be demonstrated in 5 out of 6 secondary hyperalgesia studies. The direction of MOR-antagonist dependent effects upon pain ratings, threshold assessments and somatosensory evoked potentials (SSEP), did not appear consistent in 28 out of 32 ʻpainʼ model studies. In conclusion, only in 2 experimental human pain models, i.e., stress-induced analgesia and rTMS, administration of MOR-antagonist demonstrated a consistent effect, presumably mediated by an EOS-dependent mechanisms of analgesia and hyperalgesia.
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Affiliation(s)
- Mads U. Werner
- Multidisciplinary Pain Center, Neuroscience Center, Rigshospitalet, Copenhagen, Denmark
- * E-mail:
| | - Manuel P. Pereira
- Multidisciplinary Pain Center, Neuroscience Center, Rigshospitalet, Copenhagen, Denmark
- Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, Copenhagen, Denmark
| | | | - Jørgen B. Dahl
- Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, Copenhagen, Denmark
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Tsay A, Allen T, Proske U, Giummarra M. Sensing the body in chronic pain: A review of psychophysical studies implicating altered body representation. Neurosci Biobehav Rev 2015; 52:221-32. [DOI: 10.1016/j.neubiorev.2015.03.004] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 12/11/2014] [Accepted: 03/06/2015] [Indexed: 01/29/2023]
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Ridout SJ, Ridout KK, Kao HT, Carpenter LL, Philip NS, Tyrka AR, Price LH. Telomeres, early-life stress and mental illness. ADVANCES IN PSYCHOSOMATIC MEDICINE 2015; 34:92-108. [PMID: 25832516 DOI: 10.1159/000369088] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Telomeres are structures of tandem TTAGGG repeats that are found at the ends of chromosomes and preserve genomic DNA by serving as a disposable buffer to protect DNA termini during chromosome replication. In this process, the telomere itself shortens with each cell division and can consequently be thought of as a cellular 'clock', reflecting the age of a cell and the time until senescence. Telomere shortening and changes in the levels of telomerase, the enzyme that maintains telomeres, occur in the context of certain somatic diseases and in response to selected physical stressors. Emerging evidence indicates that telomeres shorten with exposure to psychosocial stress (including early-life stress) and perhaps in association with some psychiatric disorders. These discoveries suggest that telomere shortening might be a useful biomarker for the overall stress response of an organism to various pathogenic conditions. In this regard, telomeres and their response to both somatic and psychiatric illness could serve as a unifying stress-response biomarker that crosses the brain/body distinction that is often made in medicine. Prospective studies will help to clarify whether this biomarker has broad utility in psychiatry and medicine for the evaluation of responses to psychosocial stressors. The possibility that telomere shortening can be slowed or reversed by psychiatric and psychosocial interventions could represent an opportunity for developing novel preventative and therapeutic approaches.
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Affiliation(s)
- Samuel J Ridout
- Mood Disorders Research Program and Laboratory for Clinical and Translational Neuroscience, Butler Hospital, Providence, R.I., USA
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McCrae CS, O'Shea AM, Boissoneault J, Vatthauer KE, Robinson ME, Staud R, Perlstein WM, Craggs JG. Fibromyalgia patients have reduced hippocampal volume compared with healthy controls. J Pain Res 2015; 8:47-52. [PMID: 25674013 PMCID: PMC4321661 DOI: 10.2147/jpr.s71959] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective Fibromyalgia patients frequently report cognitive abnormalities. As the hippocampus plays an important role in learning and memory, we determined whether individuals with fibromyalgia had smaller hippocampal volume compared with healthy control participants. Methods T1-weighted structural magnetic resonance imaging (MRI) scans were acquired from 40 female participants with fibromyalgia and 22 female healthy controls. The volume of the hippocampus was estimated using the software FreeSurfer. An analysis of covariance model controlling for potentially confounding factors of age, whole brain size, MRI signal quality, and Beck Depression Inventory scores were used to determine significant group differences. Results Fibromyalgia participants had significantly smaller hippocampi in both left (F[1,56]=4.55, P=0.037, η2p=0.08) and right hemispheres (F[1,56]=5.89, P=0.019, η2p=0.10). No significant effect of depression was observed in either left or right hemisphere hippocampal volume (P=0.813 and P=0.811, respectively). Discussion Potential mechanisms for reduced hippocampal volume in fibromyalgia include abnormal glutamate excitatory neurotransmission and glucocorticoid dysfunction; these factors can lead to neuronal atrophy, through excitotoxicity, and disrupt neurogenesis in the hippocampus. Hippocampal atrophy may play a role in memory and cognitive complaints among fibromyalgia patients.
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Affiliation(s)
- Christina S McCrae
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA
| | - Andrew M O'Shea
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA
| | - Jeff Boissoneault
- Pain Research and Intervention Center of Excellence, University of Florida, Gainesville, FL, USA
| | - Karlyn E Vatthauer
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA
| | - Michael E Robinson
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA ; Pain Research and Intervention Center of Excellence, University of Florida, Gainesville, FL, USA
| | - Roland Staud
- Pain Research and Intervention Center of Excellence, University of Florida, Gainesville, FL, USA ; College of Medicine, University of Florida, Gainesville, FL, USA
| | - William M Perlstein
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA ; Department of Psychiatry, University of Florida, Gainesville, FL, USA ; Malcom Randall Veterans Administration Medical Center, Gainesville, FL, USA ; Rehabilitation Research and Development Brain Research Center of Excellence, Veterans Administration Medical Center, Gainesville, FL, USA
| | - Jason G Craggs
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA
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Choi W, Lim M, Kim JS, Kim DJ, Chung CK. Impaired pre-attentive auditory processing in fibromyalgia: A mismatch negativity (MMN) study. Clin Neurophysiol 2014; 126:1310-8. [PMID: 25453609 DOI: 10.1016/j.clinph.2014.10.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 09/20/2014] [Accepted: 10/09/2014] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Fibromyalgia (FM) patients often show deficits in cognitive functions such as attention and working memory. We assumed that pre-attentive information processing, a crucial element in human perception and cognition, would be altered in FM patients. Thus, the objective of this study was to determine whether FM patients exhibit alterations in pre-attentive processing as assessed by auditory mismatch negativity (MMN). METHODS Auditory evoked magnetic fields were recorded in FM patients (n=18) and healthy control subjects (n=21) during a duration-deviant auditory oddball paradigm. The magnetic mismatch negativity (MMNm) was obtained by subtracting responses to standard tones from responses to deviant tones. Pressure pain thresholds over the thenar and trapezius muscles were determined using an algometer. RESULTS MMNm peak amplitudes in right hemispheres were attenuated, and the directional asymmetry coefficient of the MMNm amplitude was lower in FM patients, indicating a more leftward asymmetry than in healthy control subjects. Smaller right MMNm amplitude was associated with lower pressure pain thresholds of thenar muscles in FM patients. CONCLUSIONS Our results suggested that pre-attentive processing of auditory information is impaired in FM patients. SIGNIFICANCE This study provided neurophysiological evidence of impaired pre-attentive sensory change detection in FM.
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Affiliation(s)
- Woojin Choi
- Interdisciplinary Program in Neuroscience, Seoul National University College of Natural Sciences, Seoul, Republic of Korea; MEG Center, Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Manyoel Lim
- MEG Center, Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea; Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul, Republic of Korea
| | - June Sic Kim
- MEG Center, Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea; Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Republic of Korea
| | - Dajung J Kim
- MEG Center, Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea; Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, Republic of Korea
| | - Chun Kee Chung
- Interdisciplinary Program in Neuroscience, Seoul National University College of Natural Sciences, Seoul, Republic of Korea; MEG Center, Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea; Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, Republic of Korea.
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Dean DA, Adler GK, Nguyen DP, Klerman EB. Biological time series analysis using a context free language: applicability to pulsatile hormone data. PLoS One 2014; 9:e104087. [PMID: 25184442 PMCID: PMC4153563 DOI: 10.1371/journal.pone.0104087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 07/10/2014] [Indexed: 01/13/2023] Open
Abstract
We present a novel approach for analyzing biological time-series data using a context-free language (CFL) representation that allows the extraction and quantification of important features from the time-series. This representation results in Hierarchically AdaPtive (HAP) analysis, a suite of multiple complementary techniques that enable rapid analysis of data and does not require the user to set parameters. HAP analysis generates hierarchically organized parameter distributions that allow multi-scale components of the time-series to be quantified and includes a data analysis pipeline that applies recursive analyses to generate hierarchically organized results that extend traditional outcome measures such as pharmacokinetics and inter-pulse interval. Pulsicons, a novel text-based time-series representation also derived from the CFL approach, are introduced as an objective qualitative comparison nomenclature. We apply HAP to the analysis of 24 hours of frequently sampled pulsatile cortisol hormone data, which has known analysis challenges, from 14 healthy women. HAP analysis generated results in seconds and produced dozens of figures for each participant. The results quantify the observed qualitative features of cortisol data as a series of pulse clusters, each consisting of one or more embedded pulses, and identify two ultradian phenotypes in this dataset. HAP analysis is designed to be robust to individual differences and to missing data and may be applied to other pulsatile hormones. Future work can extend HAP analysis to other time-series data types, including oscillatory and other periodic physiological signals.
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Affiliation(s)
- Dennis A. Dean
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
- Neuroscience Statistical Research Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- Biomedical Engineering and Biotechnology Program, University of Massachusetts, Lowell, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Gail K. Adler
- Harvard Medical School, Boston, Massachusetts, United States of America
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
| | - David P. Nguyen
- Neuroscience Statistical Research Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | - Elizabeth B. Klerman
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
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Abstract
SUMMARY Fibromyalgia is a clinical syndrome with a widely heterogeneous presentation that can present significant difficulty in diagnosis and management. It is becoming clear that patients with fibromyalgia experience pain at a higher intensity than normal healthy individuals, and that the difference in their experience of pain is likely secondary to abnormalities in central pain processing rather than dysfunction in the peripheral tissues. However, the exact cause of these abnormalities remains unclear. What we do know is that fibromyalgia syndrome is a complex condition that requires a unique, well-coordinated and multidisciplinary approach to treatment with the understanding that it is not a disease that can be cured, but rather a clinical syndrome that can be managed. The goal of this article is to review our current understanding of the etiology, pathophysiology and diagnosis of fibromyalgia syndrome as well as to review the evidence for current treatment strategies. While we do not provide any novel research, where available, the results of published meta-analyses are summarized as are some original studies. This article also discusses the new preliminary diagnostic criteria for fibromyalgia syndrome, which was proposed by Wolfe et al. in 2010. It is the opinion of the senior author of this paper that, while these criteria are proposed with good intentions and are likely to be helpful in the area of clinical and epidemiological research, in the clinical setting they are likely to add more confusion than clarity and lead to an increased diagnosis of fibromyalgia syndrome at a time when few physicians are interested in and willing to properly care for these individuals. Many of the patients who would be diagnosed under the new criteria are likely to be sidelined, poorly served and treated inappropriately and excessively, adding stress to an already over-burdened healthcare system. The senior author of this paper warns that caution should be undertaken before widespread use of these proposed criteria is implemented in the clinical setting.
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Affiliation(s)
- Deven Karvelas
- Rehabilitation Medicine Professionals, SC, Milwaukee, WI, USA
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Jensen KB, Srinivasan P, Spaeth R, Tan Y, Kosek E, Petzke F, Carville S, Fransson P, Marcus H, Williams SCR, Choy E, Vitton O, Gracely R, Ingvar M, Kong J. Overlapping structural and functional brain changes in patients with long-term exposure to fibromyalgia pain. ACTA ACUST UNITED AC 2014; 65:3293-303. [PMID: 23982850 DOI: 10.1002/art.38170] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 08/20/2013] [Indexed: 01/08/2023]
Abstract
OBJECTIVE There is vast evidence to support the presence of brain aberrations in patients with fibromyalgia (FM), and it is possible that central plasticity is critical for the transition from acute to chronic pain. The aim of the present study was to investigate the relationship between brain structure and function in patients with FM. METHODS Functional connectivity of the brain during application of intermittent pressure-pain stimuli and measures of brain structure were compared between 26 patients with FM and 13 age- and sex-matched healthy controls. Magnetic resonance imaging (MRI) was performed to obtain high-resolution anatomic images and functional MRI scans of the brain, which were used for measurements of pain-evoked brain activity. RESULTS FM patients displayed a distinct overlap between decreased cortical thickness, decreased brain volumes, and decreased functional regional coherence in the rostral anterior cingulate cortex. The morphometric changes were more pronounced with longer exposure to FM pain. In addition, there was evidence of an association between structural and functional changes in the mesolimbic areas of the brain and the severity of comorbid depression symptoms in FM patients. CONCLUSION The combined integration of structural and functional measures allowed for a unique characterization of the impact of FM pain on the brain. These data may lead to the identification of early structural and functional brain alterations in response to pain, which could be used to develop markers for predicting the development of FM and other pain disorders.
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Affiliation(s)
- Karin B Jensen
- Massachusetts General Hospital, Harvard Medical School, and Athinoula A. Martinos Center for Biomedical Imaging, Boston, Massachusetts
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Abstract
Fibromyalgia is a chronic pain condition present in 2-4% of the population. Fibromyalgia consists of widespread pain with similarities to neuropathic pain in clinical findings, pathophysiology, and neuropharmacology. Pain is the predominant symptom and allodynia and hyperalgesia are common signs. Extreme fatigue, impaired cognition and nonrestorative sleep difficulties coexist in addition to other somatic symptoms. Research including neuroimaging investigations shows abnormalities in neurotransmitters and an abnormal response to pain. Altered pain processing peripherally and centrally contribute to central sensitization and a dampened effect of the diffuse noxious inhibitory control (DNIC). Successful management incorporates education of the patient in self-management skills, cognitive behavioral therapy (CBT), exercise, and drug therapy. Tricyclic antidepressants, serotonin-norepinephrine reuptake inhibitors (SNRIs) (duloxetine and milnacipran), α2-δ ligands (gabapentin and pregabalin) are effective in reducing pain by≥30%. Some success has been shown with dopamine agonists (pramipexole), tramadol, other opioids and cannabinoids (nabilone). Further evidence-based trials using complementary treatments are needed. Fibromyalgia is complex and requires a multidisciplinary approach to treatment. Patient self-management is key.
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Affiliation(s)
- Janice E Sumpton
- Department of Pharmacy, Victoria Hospital, London Health Sciences Centre, London, Ontario, Canada.
| | - Dwight E Moulin
- Departments of Clinical Neurological Sciences and Oncology, University of Western Ontario, London, Ontario
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Abstract
Fibromyalgia is a primary brain disorder or a result of peripheral dysfunctions inducing brain alterations, with underlying mechanisms that partially overlap with other painful conditions. Although there are methodologic variations, neuroimaging studies propose neural correlations to clinical findings of abnormal pain modulation in fibromyalgia. Growing evidences of specific differences of brain activations in resting states and pain-evoked conditions confirm clinical hyperalgesia and impaired inhibitory descending systems, and also demonstrate cognitive-affective influences on painful experiences, leading to augmented pain-processing. Functional data of neural activation abnormalities parallel structural findings of gray matter atrophy, alterations of intrinsic connectivity networks, and variations in metabolites levels along multiple pathways. Data from positron-emission tomography, single-photon-emission-computed tomography, blood-oxygen-level-dependent, voxel-based morphometry, diffusion tensor imaging, default mode network analysis, and spectroscopy enable the understanding of fibromyalgia pathophysiology, and favor the future establishment of more tailored treatments.
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Affiliation(s)
- Liliana Lourenço Jorge
- Hospital Israelita Albert Einstein and Instituto de Reabilitação Lucy Montoro, Avenida Albert Einstein, 627 3rd Floor Block D, 05651901, Morumbi, Sao Paulo, Brazil.
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Westgaard RH, Mork PJ, Lorås HW, Riva R, Lundberg U. Trapezius activity of fibromyalgia patients is enhanced in stressful situations, but is similar to healthy controls in a quiet naturalistic setting: a case-control study. BMC Musculoskelet Disord 2013; 14:97. [PMID: 23506457 PMCID: PMC3606617 DOI: 10.1186/1471-2474-14-97] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Accepted: 03/13/2013] [Indexed: 11/21/2022] Open
Abstract
Background Muscle activity and pain development of fibromyalgia (FM) patients in response to mental stress show inconsistent results, when compared to healthy controls (HCs). A possible reason for the inconsistent results is the large variation in stress exposures in different studies. This study compares muscle responses of FM patients and HCs for different modes and levels of imposed stress, to elucidate features in stress exposures that distinguish stress responses of FM patients from HCs. Methods Upper trapezius (clavicular and acromial fibers), deltoid, and biceps surface electromyographic (sEMG) activity was recorded in FM patients (n=26) and HCs (n=25). Heart rate (HR) was recorded and used as indicator of autonomic activation. Tests included inspiratory breath holding (sympathetic activation procedure), mental stress tests (color-word test and backward counting; 28 min), instructed rest prior to stress test (30 min TV watching), and controlled arm movement. sEMG and HR was also recorded during an unrestrained evening stay at a patient hotel. The 5-min period with lowest trapezius muscle activity was determined. Pain (shoulder/neck, low back pain) and perceived tension were scored on VAS scales at the start and the end of the stress test and at bedtime. Results Trapezius sEMG responses of FM patients were significantly higher than HCs during sympathetic activation, mental stress, and instructed rest, but similar during arm movement and unrestrained evening activity. HR of FM patients and HCs was similar during mental stress and in the evening, including the 5-min period with lowest trapezius activity. Muscle activity of FM patients during the stress test (with shoulder/neck pain development) and the evening stay (no pain development) was similar. Conclusions FM patients show elevated muscle activity (in particular trapezius activity) in situations with imposed stress, including sympathetic activation, and putative anticipatory stress. Muscle activity and HR were similar to HCs in instructed arm movement and in a situation approaching low-stress daily living. Pain development of FM patients during the stress test may be due to activation of several stress-associated physiological systems, and not obviously caused by muscle activity in isolation.
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Affiliation(s)
- Rolf Harald Westgaard
- Department of Industrial Economics and Technology Management, Norwegian University of Science and Technology, Trondheim, Norway.
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The Central Sensitization Inventory (CSI): establishing clinically significant values for identifying central sensitivity syndromes in an outpatient chronic pain sample. THE JOURNAL OF PAIN 2013; 14:438-45. [PMID: 23490634 DOI: 10.1016/j.jpain.2012.11.012] [Citation(s) in RCA: 417] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 11/06/2012] [Accepted: 11/27/2012] [Indexed: 12/19/2022]
Abstract
UNLABELLED Central sensitization (CS) is a proposed physiological phenomenon in which central nervous system neurons become hyperexcitable, resulting in hypersensitivity to both noxious and non-noxious stimuli. The term central sensitivity syndrome (CSS) describes a group of medically indistinct (or nonspecific) disorders, such as fibromyalgia, chronic fatigue syndrome, and irritable bowel syndrome, for which CS may be a common etiology. In a previous study, the Central Sensitization Inventory (CSI) was introduced as a screening instrument for clinicians to help identify patients with a CSS. It was found to have high reliability and validity (test-retest reliability = .82; Cronbach's alpha = .88). The present study investigated a cohort of 121 patients who were referred to a multidisciplinary pain center, which specializes in the assessment and treatment of complex pain and psychophysiological disorders, including CSSs. A large percentage of patients (n = 89, 74%) met clinical criteria for one or more CSSs, and CSI scores were positively correlated with the number of diagnosed CSSs. A receiver operating characteristic analysis determined that a CSI score of 40 out of 100 best distinguished between the CSS patient group and a nonpatient comparison sample (N = 129) (area under the curve = .86, sensitivity = 81%, specificity = 75%). PERSPECTIVE The CSI is a new self-report screening instrument to help identify patients with CSSs, including fibromyalgia. The present study investigated CSI scores in a heterogeneous pain population with a large percentage of CSSs, and a normative nonclinical sample to determine a clinically relevant cutoff value.
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Telomeres and early-life stress: an overview. Biol Psychiatry 2013; 73:15-23. [PMID: 22831981 PMCID: PMC3495091 DOI: 10.1016/j.biopsych.2012.06.025] [Citation(s) in RCA: 232] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/26/2012] [Accepted: 06/26/2012] [Indexed: 01/29/2023]
Abstract
The long-term sequelae of adverse early-life experiences have long been a focus in psychiatry, with a historic neurobiological emphasis on physiological systems that are demonstrably stress-responsive, such as the hypothalamic-pituitary-adrenal axis and neuroimmune function. However, there has been increasing recognition in the general medical literature that such sequelae might encompass more pervasive alterations in health status and physiology. Recent findings in telomere biology have suggested a new avenue for exploring the adverse health effects of childhood maltreatment. Telomere length in proliferative tissues declines with cell replication and the effect can be accelerated by such factors as inflammation, oxidative stress, radiation, and toxins. Reduced telomere length, as a proxy for cellular aging, has been associated with numerous chronic somatic diseases that are generally considered to be diseases of aging, such as diabetes, cancer, and heart disease. More recently, shorter telomeres have been demonstrated in several psychiatric conditions, particularly depression. Sustained psychosocial stress of a variety of types in adulthood appears to be associated with shorter telomeres. Now, emerging work suggests a robust, and perhaps dose-dependent, relationship with early-life stress. These findings present new opportunities to reconceptualize the complex relationships between experience, physical and psychiatric disease, and aging.
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Lötsch J, Kraetsch HG, Wendler J, Hummel T. Self-ratings of higher olfactory acuity contrast with reduced olfactory test results of fibromyalgia patients. Int J Psychophysiol 2012; 86:182-6. [PMID: 22985737 DOI: 10.1016/j.ijpsycho.2012.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/28/2012] [Accepted: 09/10/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND Self-reports of fibromyalgia (FM) patients about an enhanced olfactory acuity have been used to characterize them as persons with a general increased sensitivity to sensory input consistent with a central sensitization. However, as reduced activations in some brain areas also seem to accompany FM, a multisensory hypersensitivity is not a necessary consequence. METHODS FM patients meeting ARA (American Rheumatism Association) criteria (16 women and one man, aged 23-56 years, spontaneous pain 32-91 mm visual analog scale [VAS], 14-18 tender points with a pressure pain threshold of 1.5±0.7 kg/cm(2)) received an olfactory test (Sniffn' Sticks) to assess their odor thresholds to n-butanol and their ability to discriminate and identify odors. Healthy controls were 14 age-matched women and one man. RESULTS Patients had poorer odor identification than controls (14.6±1.3 vs. 15.5±0.6; p<0.05) but did not differ in odor thresholds or odor discrimination. This test result contrasted with the patients' self-ratings of their olfactory sensitivity as higher than average. CONCLUSIONS The perception of FM patients as being multisensory hypersensitive is not supported by present results. In contrast to the subjects' self-ratings, measurements of olfactory function showed a slightly reduced odor identification, with a by-and-large normal performance.
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Affiliation(s)
- Jörn Lötsch
- Institute of Clinical Pharmacology, Goethe-University, D-60590 Frankfurt am Main, Germany.
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Pergolizzi J, Alegre C, Blake D, Alén JC, Caporali R, Casser HR, Correa-Illanes G, Fernandes P, Galilea E, Jany R, Jones A, Mejjad O, Morovic-Vergles J, Oteo-Álvaro Á, Radrigán Araya FJ, Simões MEC, Uomo G. Current considerations for the treatment of severe chronic pain: the potential for tapentadol. Pain Pract 2012; 12:290-306. [PMID: 21797962 DOI: 10.1111/j.1533-2500.2011.00487.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Studies suggest that around 20% of adults in Europe experience chronic pain, which not only has a considerable impact on their quality of life but also imposes a substantial economic burden on society. More than one-third of these people feel that their pain is inadequately managed. A range of analgesic drugs is currently available, but recent guidelines recommend that NSAIDs and COX-2 inhibitors should be prescribed cautiously. Although the short-term efficacy of opioids is good, adverse events are common and doses are frequently limited by tolerability problems. There is a perceived need for improved pharmacological treatment options. Currently, many treatment decisions are based solely on pain intensity. However, chronic pain is multifactorial and this apaproach ignores the fact that different causative mechanisms may be involved. The presence of more than one causative mechanism means that chronic pain can seldom be controlled by a single agent. Therefore, combining drugs with different analgesic actions increases the probability of interrupting the pain signal, but is often associated with an increased risk of drug/drug interactions, low compliance and increased side effects. Tapentadol combines μ-opioid receptor agonism and noradrenaline reuptake inhibition in a single molecule, with both mechanisms contributing to its analgesic effects. Preclinical testing has shown that μ-opioid agonism is primarily responsible for analgesia in acute pain, whereas noradrenaline reuptake inhibition is more important in chronic pain. In clinical trials in patients with chronic pain, the efficacy of tapentadol was similar to that of oxycodone, but it produced significantly fewer gastrointestinal side-effects and treatment discontinuations. Pain relief remained stable throughout a 1-year safety study. Thus, tapentadol could possibly overcome some of the limitations of currently available analgesics for the treatment of chronic pain.
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Affiliation(s)
- Joseph Pergolizzi
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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Gormsen L, Rosenberg R, Bach FW, Jensen TS. Depression, anxiety, health-related quality of life and pain in patients with chronic fibromyalgia and neuropathic pain. Eur J Pain 2012; 14:127.e1-8. [DOI: 10.1016/j.ejpain.2009.03.010] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 03/13/2009] [Accepted: 03/25/2009] [Indexed: 11/16/2022]
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Affaitati G, Costantini R, Fabrizio A, Lapenna D, Tafuri E, Giamberardino MA. Effects of treatment of peripheral pain generators in fibromyalgia patients. Eur J Pain 2012; 15:61-9. [DOI: 10.1016/j.ejpain.2010.09.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2010] [Revised: 08/18/2010] [Accepted: 09/05/2010] [Indexed: 10/19/2022]
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New Concepts in Pain Research and Pain Management of the Rheumatic Diseases. Semin Arthritis Rheum 2011; 41:319-34. [DOI: 10.1016/j.semarthrit.2011.04.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 03/24/2011] [Accepted: 04/03/2011] [Indexed: 12/31/2022]
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Fibromyalgia and depression. PAIN RESEARCH AND TREATMENT 2011; 2012:486590. [PMID: 22191023 PMCID: PMC3236322 DOI: 10.1155/2012/486590] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 09/30/2011] [Indexed: 11/25/2022]
Abstract
Fibromyalgia and depression might represent two manifestations of affective spectrum disorder. They share similar pathophysiology and are largely targeted by the same drugs with dual action on serotoninergic and noradrenergic systems. Here, we review evidence for genetic and environmental factors that predispose, precipitate, and perpetuate fibromyalgia and depression and include laboratory findings on the role of depression in fibromyalgia. Further, we comment on several aspects of fibromyalgia which support the development of reactive depression, substantially more so than in other chronic pain syndromes. However, while sharing many features with depression, fibromyalgia is associated with somatic comorbidities and absolutely defined by fluctuating spontaneous widespread pain. Fibromyalgia may, therefore, be more appropriately grouped together with other functional pain disorders, while psychologically distressed subgroups grouped additionally or solely with affective spectrum disorders.
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Neurobiology underlying fibromyalgia symptoms. PAIN RESEARCH AND TREATMENT 2011; 2012:585419. [PMID: 22135739 PMCID: PMC3205654 DOI: 10.1155/2012/585419] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 08/23/2011] [Indexed: 12/04/2022]
Abstract
Fibromyalgia is characterized by chronic widespread pain, clinical symptoms that include cognitive and sleep disturbances, and other abnormalities such as increased sensitivity to painful stimuli, increased sensitivity to multiple sensory modalities, and altered pain modulatory mechanisms. Here we relate experimental findings of fibromyalgia symptoms to anatomical and functional brain changes. Neuroimaging studies show augmented sensory processing in pain-related areas, which, together with gray matter decreases and neurochemical abnormalities in areas related to pain modulation, supports the psychophysical evidence of altered pain perception and inhibition. Gray matter decreases in areas related to emotional decision making and working memory suggest that cognitive disturbances could be related to brain alterations. Altered levels of neurotransmitters involved in sleep regulation link disordered sleep to neurochemical abnormalities. Thus, current evidence supports the view that at least some fibromyalgia symptoms are associated with brain dysfunctions or alterations, giving the long-held “it is all in your head” view of the disorder a new meaning.
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Dysfunctional neurotransmitter systems in fibromyalgia, their role in central stress circuitry and pharmacological actions on these systems. PAIN RESEARCH AND TREATMENT 2011; 2012:741746. [PMID: 22110944 PMCID: PMC3195783 DOI: 10.1155/2012/741746] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 07/11/2011] [Indexed: 01/06/2023]
Abstract
Fibromyalgia is considered a stress-related disorder, and hypo- as well as hyperactive stress systems (sympathetic nervous system and hypothalamic-pituitary-adrenal axis) have been found. Some observations raise doubts on the view that alterations in these stress systems are solely responsible for fibromyalgia symptoms. Cumulative evidence points at dysfunctional transmitter systems that may underlie the major symptoms of the condition. In addition, all transmitter systems found to be altered in fibromyalgia influence the body's stress systems. Since both transmitter and stress systems change during chronic stress, it is conceivable that both systems change in parallel, interact, and contribute to the phenotype of fibromyalgia. As we outline in this paper, subgroups of patients might exhibit varying degrees and types of transmitter dysfunction, explaining differences in symptomatoloy and contributing to the heterogeneity of fibromyalgia. The finding that not all fibromyalgia patients respond to the same medications, targeting dysfunctional transmitter systems, further supports this hypothesis.
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