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Central sensitisation

Lewis Kass-Iliyya, Matthew Leung, Andrew Marshall, Paula Trotter, Christopher Kobylecki, Susannah Walker, David Gosal, Maria Jeziorska, Rayaz A Malik, Francis McGlone, Monty A Silverdale
Affective touch sensation is conducted by a sub-class of C-fibres in hairy skin known as C-Tactile (CT) afferents. CT afferents respond maximally to gentle skin stroking at velocities between 1-10 cm/sec. Parkinson's disease (PD) is characterised by markedly reduced cutaneous C-fibres. It is not known if affective touch perception is influenced by C fibre density and if affective touch is impaired in PD compared to healthy controls. We predicted that perceived pleasantness to gentle stroking in PD would correlate with C afferent density and that affective touch perception would be impaired in PD compared to healthy controls...
November 17, 2016: European Journal of Neuroscience
B Stegenga
Complaints of pain in the orofacial area usually are odontogenic in origin or have to do with temporomandibular dysfunction. Dentists can, nevertheless, be confronted with a number of disorders that are non-odontogenic in nature. In such instances it is not always a matter of nociceptive pain, associated with somatic damage, but the pain can also be the result of nerve damage (neuropathic pain) or of changes that may occur within the central nervous system (central sensitisation). In most of these cases, the pain is chronic in nature...
November 2016: Nederlands Tijdschrift Voor Tandheelkunde
Jan Lidbeck
Central sensitisation and chronic organ-related pain Central sensitisation is an essential mechanism in chronic musculoskeletal pain. In recent years, increasing evidence has come to light suggesting that central sensitisation is also a cause of chronic organ-related pain. This has several important implications. One is the need for broader professional education in mechanism-based pain classification. Today, simple clinical diagnostic procedures are used for the identification of central sensitisation in chronic musculoskeletal disorders, and these may also prove useful in the classification of organ-related pain...
October 25, 2016: Läkartidningen
Glenwood Goss, Chun-Ming Tsai, Frances A Shepherd, Lyudmila Bazhenova, Jong Seok Lee, Gee-Chen Chang, Lucio Crino, Miyako Satouchi, Quincy Chu, Toyoaki Hida, Ji-Youn Han, Oscar Juan, Frank Dunphy, Makoto Nishio, Jin-Hyoung Kang, Margarita Majem, Helen Mann, Mireille Cantarini, Serban Ghiorghiu, Tetsuya Mitsudomi
BACKGROUND: Osimertinib (AZD9291) is an oral, potent, irreversible EGFR tyrosine-kinase inhibitor selective for EGFR tyrosine-kinase inhibitor sensitising mutations, and the EGFR Thr790Met resistance mutation. We assessed the efficacy and safety of osimertinib in patients with EGFR Thr790Met-positive non-small-cell lung cancer (NSCLC), who had progressed after previous therapy with an approved EGFR tyrosine-kinase inhibitor. METHODS: In this phase 2, open-label, single-arm study (AURA2), patients aged at least 18 years with centrally confirmed EGFR Thr790Met-positive mutations, locally advanced or metastatic (stage IIIB/IV) NSCLC who progressed on previous EGFR tyrosine-kinase inhibitor therapy received osimertinib 80 mg orally once daily; treatment could continue beyond progression if the investigator observed a clinical benefit...
October 14, 2016: Lancet Oncology
A Dell'Isola, R Allan, S L Smith, S S P Marreiros, M Steultjens
BACKGROUND: Knee Osteoarthritis (KOA) is a heterogeneous pathology characterized by a complex and multifactorial nature. It has been hypothesised that these differences are due to the existence of underlying phenotypes representing different mechanisms of the disease. METHODS: The aim of this study is to identify the current evidence for the existence of groups of variables which point towards the existence of distinct clinical phenotypes in the KOA population. A systematic literature search in PubMed was conducted...
October 12, 2016: BMC Musculoskeletal Disorders
Ubedullah Kaka, Bullo Saifullah, Adamu Abdul Abubakar, Yong Meng Goh, Sharida Fakurazi, Asmatullah Kaka, Atique Ahmed Behan, Mahdi Ebrahimi, Hui Cheng Chen
BACKGROUND: Central sensitization is a potential severe consequence of invasive surgical procedures. It results in postoperative and potentially chronic pain enhancement. It results in postoperative pain enhancement; clinically manifested as hyperalgesia and allodynia. N-methyl-D-aspartate (NMDA) receptor plays a crucial role in the mechanism of central sensitisation. Ketamine is most commonly used NMDA-antagonist in human and veterinary practice. However, the antinociceptive serum concentration of ketamine is not yet properly established in dogs...
September 9, 2016: BMC Veterinary Research
K Höfner
In 2002, the International Continence Society defined the term overactive bladder (OAB) as a symptom syndrome that is accompanied by urgency with or without urge incontinence, frequency and nocturia. A proven urinary tract infection or other obvious pathologies must be excluded.The pathophysiology of OAB has not been clarified in detail and is the subject of ongoing research, so partially overlapping hypotheses exist. The urothelium-based hypothesis suggests functional changes of urothelial receptors as well as functional changes regarding the sensitivity and coupling of the suburothelial myofibroblasts, which ultimately lead to increasing activity of afferent signals and urgency...
September 6, 2016: Aktuelle Urologie
James Hunt, Jo Murrell, David Knazovicky, John Harris, Sara Kelly, Toby G Knowles, B Duncan X Lascelles
Naturally occurring canine osteoarthritis represents a welfare issue for affected dogs (Canis familiaris), but is also considered very similar to human osteoarthritis and has therefore been proposed as a model of disease in humans. Central sensitisation is recognized in human osteoarthritis sufferers but identification in dogs is challenging. Electromyographic measurement of responses to nociceptive stimulation represents a potential means of investigating alterations in central nociceptive processing, and has been evaluated in conscious experimental dogs, but is likely to be aversive...
2016: PloS One
Charles W Mcmonnies
Dry eye syndromes can involve both nociceptive and neuropathic symptoms. Nociceptive symptoms are the normal physiological responses to noxious stimuli. Neuropathic symptoms are caused by a lesion or disease of the somatosensory nervous system and can be the result of hypersensitisation of peripheral or central corneal and conjunctival somatosensory nerves. For example, inflammation could induce neuroplastic peripheral sensitisation of the ocular surface or lid wiper and exacerbate nociceptive symptoms. Neuropathic symptoms may explain the incommensurate relation between signs and symptoms in some dry eye syndromes although absence of signs of a dry eye syndrome may also be a consequence of inappropriate methods used when examining for them...
July 15, 2016: Journal of Optometry
Suad T Saad, Alexander J Metherell, Elizabeth Baggaley, Michael D Ward
A series of dinuclear Ir(iii)/Re(i) complexes has been prepared based on a family of symmetrical bridging ligands containing two bidentate N,N'-chelating pyrazolyl-pyridine termini, connected by a central aromatic or aliphatic spacer. The Ir(iii) termini are based on {Ir(F2ppy)2}(+) units (where F2ppy is the cyclometallating anion of a fluorinated phenylpyridine) and the Re(i) termini are based on {Re(CO)3Cl} units. Both types of terminus are luminescent, with the Ir-based unit showing characteristic strong, structured phosphorescence in the blue region (maximum 452 nm) with a triplet excited state energy of 22 200 cm(-1) and the Re-based unit showing much weaker and lower-energy phosphorescence (maximum 530 nm) with a triplet excited state energy of 21 300 cm(-1)...
July 28, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
María L Cuadrado, Ángel Aledo-Serrano, Patricia Navarro, Pedro López-Ruiz, César Fernández-de-Las-Peñas, Inés González-Suárez, Aida Orviz, Cristina Fernández-Pérez
BACKGROUND: Greater occipital nerve (GON) blocks are widely used for the treatment of headaches, but quality evidence regarding their efficacy is scarce. OBJECTIVE: The objective of this article is to assess the short-term clinical efficacy of GON anaesthetic blocks in chronic migraine (CM) and to analyse their effect on pressure pain thresholds (PPTs) in different territories. PARTICIPANTS AND METHODS: The study was designed as a double-blind, randomised, placebo-controlled clinical trial...
June 12, 2016: Cephalalgia: An International Journal of Headache
Katie Baker, Kristof Raemdonck, Bilel Dekkak, Robert J Snelgrove, John Ford, Fisnik Shala, Maria G Belvisi, Mark A Birrell
BACKGROUND: Asthma prevalence has increased world-wide especially in children; thus there is a need to develop new therapies that are safe and effective especially for patients with severe/refractory asthma. CD4(+) T cells are thought to play a central role in disease pathogenesis and associated symptoms. Recently, TRPV1 has been demonstrated to regulate the activation and inflammatory properties of CD4(+) cells. The aim of these experiments was to demonstrate the importance of CD4(+) T cells and the role of TRPV1 in an asthma model using a clinically ready TRPV1 inhibitor (XEN-D0501) and genetically modified (GM) animals...
2016: Respiratory Research
C F Underwood, C M Hildreth, B F Wyse, R Boyd, A K Goodchild, J K Phillips
Chronic kidney disease (CKD) carries a large cardiovascular burden in part due to hypertension and neurohumoral dysfunction - manifesting as sympathetic overactivity, baroreflex dysfunction and chronically elevated circulating vasopressin. Alterations within the central nervous system (CNS) are necessary for the expression of neurohumoral dysfunction in CKD; however, the underlying mechanisms are poorly defined. Uraemic toxins are a diverse group of compounds that accumulate as a direct result of renal disease and drive dysfunction in multiple organs, including the brain...
June 1, 2016: Acta Physiologica
P C R Conti, Y M Costa, D A Gonçalves, P Svensson
There are relevant clinical overlaps between some of the painful temporomandibular disorders (TMD) and headache conditions that may hamper the diagnostic process and treatment. A non-systematic search for studies on the relationship between TMD and headaches was carried out in the following databases: PubMed, Cochrane Library and Embase. Important pain mechanisms contributing to the close association and complex relationship between TMD and headache disorders are as follows: processes of peripheral and central sensitisation which take place in similar anatomical areas, the possible impairment of the descending modulatory pain pathways and the processes of referred pain...
September 2016: Journal of Oral Rehabilitation
Colette Ridehalgh, Ann Moore, Alan Hough
BACKGROUND: Limited research exists for the effects of neurodynamic treatment techniques. Understanding short term physiological outcomes could help to better understand immediate benefits or harm of treatment. OBJECTIVES: To assess the short-term effects of a straight leg raise (SLR) tensioner 'intervention' on pressure pain thresholds (PPT) and vibration thresholds (VT), and establish if additional factors influence outcome in individuals with spinally referred leg pain...
June 2016: Manual Therapy
Kristof Raemdonck, Katie Baker, Nicole Dale, Eric Dubuis, Fisnik Shala, Maria G Belvisi, Mark A Birrell
BACKGROUND: The incidence of asthma is increasing at an alarming rate and while the current available therapies are effective in the majority of patients they fail to adequately control symptoms at the more severe end of the disease spectrum. In the search to understand disease pathogenesis and find effective therapies animal models are often employed. As exposure to house dust mite (HDM) has a causative link, it is thought of as the allergen of choice for modelling asthma. The objective was to develop a HDM driven model of asthmatic sensitisation and characterise the role of key allergic effector cells/mediators...
2016: Respiratory Research
Robert J Boyle, Despo Ierodiakonou, Tasnia Khan, Jennifer Chivinge, Zoe Robinson, Natalie Geoghegan, Katharine Jarrold, Thalia Afxentiou, Tim Reeves, Sergio Cunha, Marialena Trivella, Vanessa Garcia-Larsen, Jo Leonardi-Bee
OBJECTIVE: To determine whether feeding infants with hydrolysed formula reduces their risk of allergic or autoimmune disease. DESIGN: Systematic review and meta-analysis, as part of a series of systematic reviews commissioned by the UK Food Standards Agency to inform guidelines on infant feeding. Two authors selected studies by consensus, independently extracted data, and assessed the quality of included studies using the Cochrane risk of bias tool. DATA SOURCES: Medline, Embase, Web of Science, CENTRAL, and LILACS searched between January 1946 and April 2015...
2016: BMJ: British Medical Journal
T Blikman, W Rienstra, T M van Raaij, A J ten Hagen, B Dijkstra, W P Zijlstra, S K Bulstra, I van den Akker-Scheek, M Stevens
INTRODUCTION: Residual pain is a major factor in patient dissatisfaction following total hip arthroplasty or total knee arthroplasty (THA/TKA). The proportion of patients with unfavourable long-term residual pain is high, ranging from 7% to 34%. There are studies indicating that a preoperative degree of central sensitisation (CS) is associated with poorer postoperative outcomes and residual pain. It is thus hypothesised that preoperative treatment of CS could enhance postoperative outcomes...
2016: BMJ Open
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No abstract text is available yet for this article.
March 2016: Nursing Older People
Thelma A Lovick
Afferent input from Aδ and C-fibres innervating the urinary bladder are processed differently by the brain, and have different roles in signaling bladder sensation. Aδ fibres that signal bladder filling activate a spino-bulbo-spinal loop, which relays in the midbrain periaqueductal grey (PAG) and pontine micturition centre (PMC). The excitability of this circuitry is regulated by tonic GABAergic inhibitory processes. In humans and socialised animals micturition is normally under volitional control and influenced by a host of psychosocial factors...
February 6, 2016: Autonomic Neuroscience: Basic & Clinical
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