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"Central Sensitization"

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https://www.readbyqxmd.com/read/29329739/association-between-symptoms-of-central-sensitization-and-cognitive-behavioral-factors-in-people-with-chronic-nonspecific-low-back-pain-a-cross-sectional-study
#1
Eva Huysmans, Kelly Ickmans, Dries Van Dyck, Jo Nijs, Yori Gidron, Nathalie Roussel, Andrea Polli, Maarten Moens, Lisa Goudman, Margot De Kooning
OBJECTIVE: The objective of this cross-sectional study was to analyze the relationship between symptoms of central sensitization (CS) and important cognitive behavioral and psychosocial factors in a sample of patients with chronic nonspecific low back pain. METHODS: Participants with chronic nonspecific low back pain for at least 3 months were included in the study. They completed several questionnaires and a functional test. Pearson's correlation was used to analyze associations between symptoms of CS and pain behavior, functioning, pain, pain catastrophizing, kinesiophobia, and illness perceptions...
January 9, 2018: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/29327392/differences-in-white-matter-structure-and-cortical-thickness-between-patients-with-traumatic-and-idiopathic-chronic-neck-pain-associations-with-cognition-and-pain-modulation
#2
I Coppieters, R De Pauw, K Caeyenberghs, D Lenoir, K DeBlaere, E Genbrugge, M Meeus, B Cagnie
Brain alterations are hypothesized to be present in patients with chronic whiplash-associated disorders (CWAD). The aim of this case-control study was to examine alterations in cortical thickness and white matter (WM) structure, and the presence of brain microhemorrhages in a patient group encountering chronic neck pain of traumatic origin (i.e., CWAD) when compared with a patient group characterized by nontraumatic chronic neck pain [i.e., chronic idiopathic neck pain (CINP)], and healthy controls. Furthermore, we aimed to investigate associations between brain structure on one hand and cognitive performance and central sensitization (CS) on the other hand...
January 11, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29319606/disruption-of-nnos-nos1ap-protein-protein-interactions-suppresses-neuropathic-pain-in-mice
#3
Wan-Hung Lee, Li-Li Li, Aarti Chawla, Andy Hudmon, Yvonne Y Lai, Michael J Courtney, Andrea G Hohmann
Elevated N-methyl-D-aspartate receptor (NMDAR) activity is linked to central sensitization and chronic pain. However, NMDAR antagonists display limited therapeutic potential due to their adverse side effects. Novel approaches targeting the NR2B-PSD95-nNOS complex to disrupt signaling pathways downstream of NMDARs show efficacy in preclinical pain models. Here, we evaluated the involvement of interactions between neuronal nitric oxide synthase (nNOS) and the nitric oxide synthase 1 adaptor protein (NOS1AP) in pronociceptive signaling and neuropathic pain...
January 9, 2018: Pain
https://www.readbyqxmd.com/read/29316386/changes-in-pain-sensitization-after-bariatric-surgery
#4
Joshua J Stefanik, David T Felson, Caroline M Apovian, Jingbo Niu, M Margaret Clancy, Michael P LaValley, Tuhina Neogi
OBJECTIVE: To evaluate changes in pain (at the knee and elsewhere) and pain sensitization in obese persons with knee pain undergoing bariatric surgery compared with similarly obese persons undergoing medical management. METHODS: Individuals undergoing bariatric surgery and medical management were recruited. Knee pain severity of the more painful knee (index knee) was assessed at baseline and 12 months using the WOMAC. Pressure pain threshold (PPT) was assessed at the index patella and the right wrist...
January 5, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29315262/intraarticularly-injected-mesenchymal-stem-cells-stimulate-anti-inflammatory-molecules-and-inhibit-pain-related-protein-and-chondrolytic-enzymes-in-a-monoiodoacetate-induced-rat-arthritis-model
#5
Toru Ichiseki, Miyako Shimazaki, Yoshimichi Ueda, Shusuke Ueda, Masanobu Tsuchiya, Daisuke Souma, Ayumi Kaneuji, Norio Kawahara
Persistent inflammation is well known to promote the progression of arthropathy. mesenchymal stem cells (MSCs) have been shown to possess anti-inflammatory properties and tissue differentiation potency. Although the experience so far with the intraarticular administration of mesenchymal stem cell (MSC) to induce cartilage regeneration has been disappointing, MSC implantation is now being attempted using various surgical techniques. Meanwhile, prevention of osteoarthritis (OA) progression and pain control remain important components of the treatment of early-stage OA...
January 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29308277/fibromyalgia-has-a-high-prevalence-and-impact-in-cardiac-failure-patients
#6
Anthea C Gist, Emma K Guymer, Andrew E Ajani, Geoffrey O Littlejohn
Objective: Chronic cardiac failure (CCF) shares several clinical features with fibromyalgia (FM), a syndrome of increased central sensitivity and musculoskeletal pain. FM frequently coexists with other chronic illness. Musculoskeletal pain is reported in patients with CCF; however, the prevalence and impact of FM in patients with CCF is not known. This research aims to assess the prevalence and effects of concurrent FM in patients with CCF and to identify other coexisting central sensitivity syndromes...
December 2017: European Journal of Rheumatology
https://www.readbyqxmd.com/read/29298725/sex-differences-in-primary-muscle-afferent-sensitization-following-ischemia-and-reperfusion-injury
#7
Jessica L Ross, Luis F Queme, Jordan E Lamb, Kathryn J Green, Michael P Jankowski
BACKGROUND: Chronic pain conditions are more prevalent in women, but most preclinical studies into mechanisms of pain generation are performed using male animals. Furthermore, whereas group III and IV nociceptive muscle afferents provoke central sensitization more effectively than their cutaneous counterparts, less is known about this critical population of muscle nociceptors. Here, we compare the physiology of individual muscle afferents in uninjured males and females. We then characterize the molecular, physiological, and behavioral effects of transient ischemia and reperfusion injury (I/R), a model we have extensively studied in males and in females...
January 3, 2018: Biology of Sex Differences
https://www.readbyqxmd.com/read/29285568/characterization-of-migraineurs-presenting-interictal-widespread-pressure-hyperalgesia-identified-using-a-tender-point-count-a-cross-sectional-study
#8
Toshihide Toriyama, Tetsuyoshi Horiuchi, Kazuhiro Hongo
BACKGROUND: Migraineurs exhibit pain hypersensitivity throughout the body during and between migraine headaches. Migraine is classified as a central sensitivity syndrome, typified by fibromyalgia showing widespread pressure hyperalgesia determined by a tender point. This study was performed to examine whether: 1) there is a subgroup of episodic migraineurs with widespread pressure hyperalgesia during and between attacks; 2) if such a subgroup exists, what is the prevalence and what is the difference between groups with interictal widespread hyperalgesia and acute allodynia regarding the demographic and clinical characteristics of migraine...
December 28, 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/29259713/the-etiopathogenesis-of-atopic-dermatitis-barrier-disruption-immunological-derangement-and-pruritus
#9
REVIEW
Pawinee Rerknimitr, Atsushi Otsuka, Chisa Nakashima, Kenji Kabashima
Atopic dermatitis (AD) is a common chronic skin inflammatory disorder characterized by recurrent eczema accompanied by an intractable itch that leads to an impaired quality of life. Extensive recent studies have shed light on the multifaceted pathogenesis of the disease. The complex interplay among skin barrier deficiency, immunological derangement, and pruritus contributes to the development, progression, and chronicity of the disease. Abnormalities in filaggrin, other stratum corneum constituents, and tight junctions induce and/or promote skin inflammation...
2017: Inflammation and Regeneration
https://www.readbyqxmd.com/read/29240318/ketamine-in-the-treatment-of-acute-pain
#10
Elina Brinck, Vesa Kontinen
Ketamine is an old anesthetic agent that relieves pain by reducing central sensitization in the central nervous system. This is advantageous for patients suffering from severe pain prior to surgery or are using a strong opioid. The S enantiomer of ketamine used for anesthesia is more powerful than racemic ketamine. The ideal dose of ketamine for pain relief is not yet known, and its adverse effects on the central nervous system, including hallucinations, sedation, and diplopia have limited its use in pain management...
2017: Duodecim; Lääketieteellinen Aikakauskirja
https://www.readbyqxmd.com/read/29237283/ghrelin-attenuated-hyperalgesia-induced-by-chronic-nitroglycerin-cgrp-and-trpv1-as-targets-for-migraine-management
#11
Fereshteh Farajdokht, Gisou Mohaddes, Dariush Shanehbandi, Pouran Karimi, Shirin Babri
Background According to the neurovascular theory of migraine, activation of the trigeminovascular system contributes to the development of migraine. This study examined the effects of chronic intraperitoneal ghrelin (150 µg/kg) treatment on the development of chronic migraine induced by intermittent injection of nitroglycerin 10 mg/kg. Methods Baseline and post-drug (2 h following nitroglycerin injection) mechanical and thermal sensitivity were assessed by von Frey hair and tail immersion tests, respectively on days 1, 3, 5, 7, 9 and 11...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/29232206/bupivacaine-indirectly-potentiates-glutamate-induced-intracellular-calcium-signaling-in-rat-hippocampal-neurons-by-impairing-mitochondrial-function-in-cocultured-astrocytes
#12
Yuan Xing, Nan Zhang, Wei Zhang, Lei-Ming Ren
BACKGROUND: Bupivacaine induces central neurotoxicity at lower blood concentrations than cardiovascular toxicity. However, central sensitivity to bupivacaine is poorly understood. The toxicity mechanism might be related to glutamate-induced excitotoxicity in hippocampal cells. METHODS: The intracellular free Ca concentration ([Ca]i), mitochondrial membrane potential, and reactive oxygen species generation were measured by fluorescence and two-photon laser scanning microscopy in fetal rat hippocampal neurons and astrocytes...
December 12, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29229703/orai1-plays-a-crucial-role-in-central-sensitization-by-modulating-neuronal-excitability
#13
Yannong Dou, Jingsheng Xia, Ruby Gao, Xinghua Gao, Frances M Munoz, Dongyu Wei, Yuzhen Tian, James E Barrett, Seena Ajit, Olimpia Meucci, James W Putney, Yue Dai, Huijuan Hu
Pathological pain is a common and debilitating condition that is often poorly managed. Central sensitization is an important mechanism underlying pathological pain. However, candidate molecules involved in central sensitization remain unclear. Store-operated calcium channels (SOCs) mediate important calcium signals in non-excitable and excitable cells. SOCs have been implicated in a wide variety of human pathophysiological conditions including immunodeficiency, occlusive vascular diseases and cancer. However, the role of SOCs in central nervous system (CNS) disorders has been relatively unexplored...
December 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29229558/enhanced-activities-of-%C3%AE-subunit-containing-gabaa-receptors-blocked-spinal-long-term-potentiation-and-attenuated-formalin-induced-spontaneous-pain
#14
Jiang-Ping Liu, Yong-Tao He, Xing-Lian Duan, Zhan-Wei Suo, Xian Yang, Xiao-Dong Hu
The δ subunit-containing γ-Aminobutyric acid type A receptors (δ-GABAARs) are located at extrasynaptic sites and persistently active in the control of neuronal excitability. Here we recorded primary afferent C fiber-evoked field potentials in the superficial dorsal horn of rat spinal cords in vivo, and investigated the possible influence of δ-GABAARs activities on nociceptive synaptic transmission. We found that δ-GABAARs-preferring agonist THIP, when topically applied onto spinal cord dorsum, inhibited the basal synaptic responses in a dose-dependent manner...
December 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/29229212/acid-induced-experimental-muscle-pain-and-hyperalgesia-with-single-and-repeated-infusion-in-human-forearm
#15
Kelun Wang, Yi Luo, Toshiyuki Asaki, Thomas Graven-Nielsen, Brian E Cairns, Thomas Arendt-Nielsen, Lars Arendt-Nielsen
BACKGROUND AND PURPOSE: Acid has long been thought to play an important role in the pain process. Animal study showed that repeated acid stimulation induced central sensitization. The purpose of the study is to investigate muscle pain and hyperalgesia evoked by intramuscular infusion of saline at different pH levels, and to compare the effect of a single versus repeated acid infusions. METHODS: Twenty healthy subjects received infusions of buffered saline (pH 5...
October 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29229209/randomized-double-blind-placebo-controlled-dose-escalation-study-investigation-of-the-safety-pharmacokinetics-and-antihyperalgesic-activity-of-l-4-chlorokynurenine-in-healthy-volunteers
#16
Mark Wallace, Alexander White, Kathy A Grako, Randal Lane, Allen Jo Cato, H Ralph Snodgrass
BACKGROUND AND AIMS: Neuropathic pain is a significant medical problem needing more effective treatments with fewer side effects. Overactive glutamatergic transmission via N-methyl-d-aspartate receptors (NMDARs) are known to play a role in central sensitization and neuropathic pain. Although ketamine, a NMDAR channel-blocking antagonist, is often used for neuropathic pain, its side-effect profile and abusive potential has prompted the search for a safer effective oral analgesic. A novel oral prodrug, AV-101 (l-4 chlorokynurenine), which, in the brain, is converted into one of the most potent and selective GlyB site antagonists of the NMDAR, has been demonstrated to be active in animal models of neuropathic pain...
October 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29222851/convergent-validity-of-the-dutch-central-sensitization-inventory-associations-with-psychophysical-pain-measures-quality-of-life-disability-and-pain-cognitions-in-patients-with-chronic-spinal-pain
#17
Jeroen Kregel, Charline Schumacher, Mieke Dolphens, Anneleen Malfliet, Dorien Goubert, Dorine Lenoir, Barbara Cagnie, Mira Meeus, I Coppieters
OBJECTIVE: Symptoms of Central Sensitization (CS) have been described in patients with chronic spinal pain (CSP). Although a gold standard to diagnose CS is lacking, psychophysical pain measures are often used. The Central Sensitization Inventory (CSI) is proposed as an alternative method and indirect tool for evaluation of CS symptomatology. The aim of the current study was to evaluate the convergent validity of the CSI by investigating the association with psychophysical pain measures and self-reported measures of current pain intensity, quality of life, disability, and catastrophizing in CSP patients...
December 8, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29220355/adults-with-patellofemoral-pain-do-not-exhibit-manifestations-of-peripheral-and-central-sensitization-when-compared-to-healthy-pain-free-age-and-sex-matched-controls-an-assessor-blinded-cross-sectional-study
#18
Michael Skovdal Rathleff, Camilla Rams Rathleff, Aoife Stephenson, Rebecca Mellor, Mark Matthews, Kay Crossley, Bill Vicenzino
Patellofemoral Pain (PFP) is highly prevalent among adults and adolescents. Localized mechanical hyperalgesia around the knee and tibialis anterior have been observed in people with PFP, but limited knowledge of potential manifestations of central sensitisation exists. The aims of this study were to study conditioned pain modulation (CPM) and wide-spread hyperalgesia in adults with PFP. This assessor-blinded cross-sectional study design compared CPM and mechanical pressure pain thresholds (PPT) between 33 adults (23 females) diagnosed with PFP and 32 age and sex matched pain-free controls...
2017: PloS One
https://www.readbyqxmd.com/read/29217162/association-of-inflammatory-mediators-with-pain-perception
#19
REVIEW
S Ronchetti, G Migliorati, D V Delfino
Treatment of pain has always been a major goal in the clinic, as it is related to several pathological conditions of inflammatory origin and surgical procedures, which are associated with inflammatory mediators. Understanding the molecular mechanisms underlying the association between inflammatory mediators and pain perception, from peripheral to central sensitization, can provide the basis for the development of new pharmacological treatments. Despite safety concerns, till date, the use of non-steroidal anti-inflammatory drugs (NSAIDs) has been shown to be efficacious, safe, and well tolerated by patients...
December 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29216211/validation-of-the-japanese-version-of-the-central-sensitization-inventory-in-patients-with-musculoskeletal-disorders
#20
Katsuyoshi Tanaka, Tomohiko Nishigami, Akira Mibu, Masahiro Manfuku, Satoko Yono, Yoshikazu Shinohara, Akihito Tanabe, Rei Ono
BACKGROUND: Many musculoskeletal pain conditions are characterized by hypersensitivity, which is induced by central sensitization (CS). A questionnaire, the Central Sensitization Inventory (CSI), was recently developed to help clinicians identify patients whose presenting symptoms may be related to central sensitivity syndrome (CSS). The aims of the present study were to examine criterion validity and construct validity of the Japanese version of the CSI (CSI-J), and to investigate prevalence rates of CS severity levels in patients with musculoskeletal disorders...
2017: PloS One
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