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Pain

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https://www.readbyqxmd.com/read/28520648/a-longitudinal-study-of-the-influence-of-comorbidities-and-lifestyle-factors-on-low-back-pain-in-older-men
#1
P Parreira, C G Maher, M L Ferreira, G C Machado, F M Blyth, V Naganathan, L M Waite, M J Seibel, D Handelsman, R G Cumming
Older adults are largely under-represented in to LBP research. In light of the ageing population, it is crucial to understand the influence of comorbidities and lifestyle factors on the risk and prognosis of LBP in older adults. The aims of this study were to describe the course of LBP in older men; to investigate if comorbidities/ lifestyle factors can predict the course of LBP in older men; to assess if comorbidities/ lifestyle factors increase the risk of developing LBP in older men. The study sample comprised 1,685 older men living in suburban Sydney, Australia...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28520647/altered-brain-structure-and-function-associated-with-sensory-and-affective-components-of-classic-trigeminal-neuralgia
#2
Yuan Wang, Dong-Yuan Cao, Bethany Remeniuk, Samuel Krimmel, David A Seminowicz, Ming Zhang
Classic trigeminal neuralgia (CTN) is a chronic neuropathic pain state characterized by intense, piercing spasms of the orofacial region, and may be attributable to abnormal pain processing in the central nervous system. Our study investigated neuronal alterations using voxel-based morphometry (VBM), diffuse tensor imaging (DTI), and resting state functional connectivity in 38 CTN patients and 38 matched healthy controls. For VBM analyses, CTN patients displayed gray matter volume (GMV) reductions in the anterior and mid cingulate cortex (ACC and MCC), insula, secondary somatosensory cortex (S2), primary motor cortex (M1), premotor area (PMA), and several regions in the temporal lobe...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28520646/relationship-between-pubertal-timing-and-chronic-nonspecific-pain-in-adolescent-girls-the-young-hunt3-study-2006-2008
#3
Barbro Kløven, Gry B Hoftun, Pål R Romundstad, Marite Rygg
The aim of this study was to examine a possible relationship between early puberty and chronic non-specific pain in 13-18 years old girls. All adolescents in Nord-Trøndelag County, Norway, were invited to participate in the Young-HUNT3 study (2006-2008). Of the invited girls 81% answered the questionnaire and of these 3982 were 13-18 years. Menarche and perceived physical maturation were used as exposure measures. Early menarche was defined as <12 years, normal menarche as ≥12 and <14 years, and late menarche as ≥14 years...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28489621/own-and-partner-pain-intensity-in-older-couples-longitudinal-effects-on-depressive-symptoms
#4
Courtney A Polenick, Jessica M Brooks, Kira S Birditt
Chronic pain has been linked to depression among individuals and their partners. Yet little is known about long-term mutual influences between pain intensity and depressive symptoms within couples as they age. Utilizing a nationally representative US sample of wives and husbands aged 50 and older (M = 64.45, SD = 7.85), this study explored the links between own and partner pain intensity and depressive symptoms across an 8-year period. A total of 940 heterosexual married couples drawn from the Health and Retirement Study (HRS) completed interviews biennially from 2006 to 2014...
May 9, 2017: Pain
https://www.readbyqxmd.com/read/28541258/paclitaxel-induced-painful-neuropathy-is-associated-with-changes-in-mitochondrial-bioenergetics-glycolysis-and-an-energy-deficit-in-dorsal-root-ganglia-neurons
#5
Natalie A Duggett, Lisa A Griffiths, Sarah J L Flatters
Painful neuropathy is the major dose-limiting side effect of paclitaxel chemotherapy. Mitochondrial dysfunction and ATP deficit have previously been shown in peripheral nerves of paclitaxel-treated rats, but the effects of paclitaxel in the DRG have not been explored. The aim of this study was to determine the bioenergetic status of DRG neurons following paclitaxel exposure in vitro and in vivo. Utilising isolated DRG neurons, we measured respiratory function under basal conditions and at maximal capacity, glycolytic function and ADP/ATP levels at three key behavioural time-points; prior to pain onset (day 7), peak pain severity and pain resolution...
May 2, 2017: Pain
https://www.readbyqxmd.com/read/28394852/peripheral-inflammatory-pain-sensitisation-is-independent-of-mast-cell-activation-in-male-mice
#6
Douglas M Lopes, Franziska Denk, Kim I Chisholm, Tesha Suddason, Camille Durrieux, Matthew Thakur, Clive Gentry, Stephen B McMahon
The immune and sensory systems are known for their close proximity and interaction. Indeed, in a variety of pain states, a myriad of different immune cells are activated and recruited, playing a key role in neuronal sensitisation. During inflammatory pain it is thought that mast cells (MC) are one of the immune cell types involved in this process, but so far the evidence outlining their direct effect on neuronal cells remains unclear. To clarify whether MC are involved in inflammatory pain states, we used a transgenic mouse line (Mctp5Cre-iDTR) in which MC could be depleted in an inducible manner by administration of diphtheria toxin...
May 2, 2017: Pain
https://www.readbyqxmd.com/read/28471875/genetic-predictors-of-recovery-in-low-back-and-lumbar-radicular-pain
#7
Siri Bjorland, Cecilie Røe, Aurora Moen, Elina Schistad, Aqsa Mahmood, Johannes Gjerstad
Previous data suggest that persistent back pain may be associated with genetic variability. In this study, we assessed the correlation between 8 genetic polymorphisms (VDR, COL11, MMP1, MMP9, IL-1á, IL-1RN, OPRM1, COMT) and pain recovery in patients with low back pain (LBP) and lumbar radicular pain (LRP). In total, 296 patients with LBP or LRP were followed for 5 years. The patients underwent standardized clinical examination and completed pain and function questionnaires. Univariate linear regression associations with p-values <0...
April 27, 2017: Pain
https://www.readbyqxmd.com/read/28471874/effects-of-acute-psychological-stress-on-placebo-and-nocebo-responses-in-a-clinically-relevant-model-of-visceroception
#8
Till Roderigo, Sven Benson, Margarita Schöls, Madeleine Hetkamp, Manfred Schedlowski, Paul Enck, Sigrid Elsenbruch
There is evidence to suggest a role of emotions in placebo and nocebo effects, but whether acute psychological stress changes the magnitude of placebo or nocebo responses has not been tested. In a clinically relevant model of visceroception, we assessed effects of acute psychological stress on changes in urgency and pain in response to positive or negative verbal suggestions. In 120 healthy volunteers, perceived urge-to-defecate and pain in response to individually calibrated rectal distensions were measured with visual analogue scales (VAS) during a BASELINE...
April 27, 2017: Pain
https://www.readbyqxmd.com/read/28541257/patient-action-as-means-and-end-of-chronic-pain-care-risks-and-routes-to-meaningful-action
#9
Amanda C de C Williams
No abstract text is available yet for this article.
April 25, 2017: Pain
https://www.readbyqxmd.com/read/28541256/modulation-of-brainstem-activity-and-connectivity-by-respiratory-gated-auricular-vagal-afferent-nerve-stimulation-in-migraine-patients
#10
Ronald G Garcia, Richard L Lin, Jeungchan Lee, Jieun Kim, Riccardo Barbieri, Roberta Sclocco, Ajay D Wasan, Robert R Edwards, Bruce R Rosen, Nouchine Hadjikhani, Vitaly Napadow
Migraine pathophysiology includes altered brainstem excitability, and recent neuromodulatory approaches aimed at controlling migraine episodes have targeted key brainstem relay and modulatory nuclei. In this study, we evaluated the impact of respiratory-gated auricular vagal afferent nerve stimulation (RAVANS), a novel neuromodulatory intervention based on an existing transcutaneous vagus nerve stimulation approach, in the modulation of brainstem activity and connectivity in migraine patients. We applied 3T-functional magnetic resonance imaging with improved in-plane spatial resolution (2...
April 25, 2017: Pain
https://www.readbyqxmd.com/read/28328574/the-long-term-reliability-of-static-and-dynamic-quantitative-sensory-testing-in-healthy-individuals
#11
Anna Marcuzzi, Paul J Wrigley, Catherine M Dean, Roger Adams, Julia M Hush
Quantitative sensory tests (QSTs) have been increasingly used to investigate alterations in somatosensory function in a wide range of painful conditions. The interpretation of these findings is based on the assumption that the measures are stable and reproducible. To date, reliability of QST has been investigated for short test-retest intervals. The aim of this study was to investigate the long-term reliability of a multimodal QST assessment in healthy people, with testing conducted on 3 occasions over 4 months...
April 19, 2017: Pain
https://www.readbyqxmd.com/read/28426553/greater-fear-of-visceral-pain-contributes-to-differences-between-visceral-and-somatic-pain-in-healthy-women
#12
Laura Ricarda Koenen, Adriane Icenhour, Katarina Forkmann, Annika Pasler, Nina Theysohn, Michael Forsting, Ulrike Bingel, Sigrid Elsenbruch
This functional magnetic resonance imaging study addressed similarities and differences in behavioral and neural responses to experimental visceral compared with somatic pain stimuli and explored the contribution of fear of pain to differences between pain modalities. In N = 22 healthy women, we assessed blood oxygen level-dependent responses to rectal distensions and cutaneous heat stimuli matched for perceived pain intensity. Fear of pain and pain unpleasantness were assessed before and after scanning. Visceral pain was more fear evoking and more unpleasant, and trial-by-trial intensity ratings failed to habituate across trials (all interactions modality × time: P < 0...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28426552/altered-neural-responses-to-heat-pain-in-drug-na%C3%A3-ve-patients-with-parkinson-s-disease
#13
Katarina Forkmann, Wiebke Grashorn, Katharina Schmidt, Odette Fründt, Carsten Buhmann, Ulrike Bingel
Pain is a frequent but still neglected non-motor symptom of Parkinson's disease (PD). However, neural mechanisms underlying pain in PD are poorly understood. Here we explored whether the high prevalence of pain in PD might be related to dysfunctional descending pain control. Using fMRI we explored neural responses during the anticipation and processing of heat pain in 21 PD patients (Hoehn&Yahr I-III) and 23 healthy controls (HC). PD patients were naïve to dopaminergic medication in order to avoid confounding drug effects...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28426551/changing-pain-expectations-the-role-of-social-context-and-communication
#14
Martien G S Schrooten, Steven J Linton
No abstract text is available yet for this article.
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28426550/neuropathic-pain-after-chronic-nerve-constriction-may-not-correlate-with-chloride-dysregulation-in-mouse-trigeminal-nucleus-caudalis-neurons
#15
Alberto Castro, Ying Li, Charles Raver, Ramesh Chandra, Radi Masri, Mary Kay Lobo, Asaf Keller
Changes in chloride reversal potential in rat spinal cord neurons have previously been associated with persistent pain in nerve injury and inflammation models. These changes correlate with a decrease in the expression of the potassium% chloride transporter, KCC2, and with increases in neuronal excitability. Here, we test the hypothesis that similar changes occur in mice with neuropathic pain induced by chronic constriction injury of the trigeminal infraorbital nerve (CCI¬-ION). This model allows us to distinguish an acute pain phase (3-¬5 days after injury) from a persistent pain phase (12¬-14 days after CCI-¬ION)...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28426549/patient-action-as-means-and-end-for-chronic-pain-care
#16
Mark D Sullivan, Kevin E Vowles
No abstract text is available yet for this article.
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28394828/rab7-a-novel-redox-target-that-modulates-inflammatory-pain-processing
#17
Wiebke Kallenborn-Gerhardt, Christine V Möser, Jana E Lorenz, Mirco Steger, Juliana Heidler, Reynir Scheving, Jonas Petersen, Lea Kennel, Cathrin Flauaus, Ruirui Lu, Aimee L Edinger, Irmgard Tegeder, Gerd Geisslinger, Heinrich Heide, Ilka Wittig, Achim Schmidtko
Chronic pain is accompanied by production of reactive oxygen species (ROS) in various cells that are important for nociceptive processing. Recent data indicate that ROS can trigger specific redox-dependent signaling processes, but the molecular targets of ROS signaling in the nociceptive system remain largely elusive. Here, we performed a proteome screen for pain-dependent redox regulation using an OxICAT approach, thereby identifying the small GTPase Rab7 as a redox-modified target during inflammatory pain in mice...
April 7, 2017: Pain
https://www.readbyqxmd.com/read/28394854/a-role-for-nk-1-neurons-in-the-rostral-ventromedial-medulla-in-the-development-of-chronic-post-thoracotomy-pain
#18
Sergey G Khasabov, Jeffrey Chi-Fei Wang, Donald A Simone, Gary R Strichartz
Thoracotomy results in chronic post-operative pain (CPTP) in half of the cases. Earlier findings in rat models of persistent post-surgical pain suggest that spinal pathways are critical for pain onset but not its maintenance. Descending systems from the brain stem modulate nociceptive transmission in the spinal cord and contribute to persistent pain, but their role in chronic postoperative pain has not been studied. Here we ablated pronociceptive neurokinin-1 receptor (NK-1R)-expressing neurons in the rat rostral ventromedial medulla (RVM) to identify their role in CPTP...
April 5, 2017: Pain
https://www.readbyqxmd.com/read/28394853/targeting-bdnf-in-the-medial-thalamus-for-the-treatment-of-central-poststroke-pain-in-a-rodent-model
#19
Hsi-Chien Shih, Yung-Hui Kuan, Bai-Chung Shyu
Approximately 7-10% of patients develop a chronic pain syndrome after stroke. This chronic pain condition is called central poststroke pain (CPSP). Recent studies have observed an abnormal increase in the secretion of brain-derived neurotrophic factor (BDNF) in spinal cord tissue after spinal cord injury. An animal model of CPSP was established by an intra-thalamus injection of collagenase. Mechanical and thermal allodynia was induced after lesions of the thalamic ventral basal complex in rats. Four weeks after the injection, the number of neurons decreased, the number of astrocytes, microglia, and P2X4 receptors increased, and BDNF mRNA expression increased in the brain lesion area...
April 5, 2017: Pain
https://www.readbyqxmd.com/read/28394851/development-and-validation-of-the-self-reported-promis-pediatric-pain-behavior-item-bank-and-short-form-scale
#20
Natoshia R Cunningham, Susmita Kashikar-Zuck, Constance Mara, Kenneth R Goldschneider, Dennis A Revicki, Carlton Dampier, David D Sherry, Lori Crosby, Adam Carle, Karon F Cook, Esi M Morgan
Pain behaviors are important indicators of functioning in chronic pain; however, no self-reported pain behavior instrument has been developed for pediatric populations. The purpose of this study was to create a brief pediatric measure of patient-reported pain behaviors as part of the Patient-Reported Outcome Measurement Information System (PROMIS). A pool of 47 candidate items for this measure had been previously developed through qualitative research. In this study, youth with chronic pain associated with juvenile fibromyalgia, juvenile idiopathic arthritis, or sickle cell disease (ages 8-18 years) from 3 pediatric centers completed all 47 candidate items for development of the pain behavior item bank along with established measures of pain interference, depressive symptoms, fatigue, average pain intensity, and pain catastrophizing...
April 5, 2017: Pain
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