1
|
Haroutounian S, Holzer KJ, Kerns RD, Veasley C, Dworkin RH, Turk DC, Carman KL, Chambers CT, Cowan P, Edwards RR, Eisenach JC, Farrar JT, Ferguson M, Forsythe LP, Freeman R, Gewandter JS, Gilron I, Goertz C, Grol-Prokopczyk H, Iyengar S, Jordan I, Kamp C, Kleykamp BA, Knowles RL, Langford DJ, Mackey S, Malamut R, Markman J, Martin KR, McNicol E, Patel KV, Rice AS, Rowbotham M, Sandbrink F, Simon LS, Steiner DJ, Vollert J. Patient engagement in designing, conducting, and disseminating clinical pain research: IMMPACT recommended considerations. Pain 2024; 165:1013-1028. [PMID: 38198239 PMCID: PMC11017749 DOI: 10.1097/j.pain.0000000000003121] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/31/2023] [Accepted: 09/08/2023] [Indexed: 01/12/2024]
Abstract
ABSTRACT In the traditional clinical research model, patients are typically involved only as participants. However, there has been a shift in recent years highlighting the value and contributions that patients bring as members of the research team, across the clinical research lifecycle. It is becoming increasingly evident that to develop research that is both meaningful to people who have the targeted condition and is feasible, there are important benefits of involving patients in the planning, conduct, and dissemination of research from its earliest stages. In fact, research funders and regulatory agencies are now explicitly encouraging, and sometimes requiring, that patients are engaged as partners in research. Although this approach has become commonplace in some fields of clinical research, it remains the exception in clinical pain research. As such, the Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials convened a meeting with patient partners and international representatives from academia, patient advocacy groups, government regulatory agencies, research funding organizations, academic journals, and the biopharmaceutical industry to develop consensus recommendations for advancing patient engagement in all stages of clinical pain research in an effective and purposeful manner. This article summarizes the results of this meeting and offers considerations for meaningful and authentic engagement of patient partners in clinical pain research, including recommendations for representation, timing, continuous engagement, measurement, reporting, and research dissemination.
Collapse
Affiliation(s)
- Simon Haroutounian
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Katherine J. Holzer
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Robert D. Kerns
- Departments of Psychiatry, Neurology, and Psychology, Yale University, New Haven, CT, United States
| | - Christin Veasley
- Chronic Pain Research Alliance, North Kingstown, RI, United States
| | - Robert H. Dworkin
- Department of Anesthesiology and Perioperative Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| | - Dennis C. Turk
- Department of Anesthesiology & Pain Medicine, University of Washington, Seattle, WA, United States
| | - Kristin L. Carman
- Patient-Centered Outcomes Research Institute (PCORI), Washington, DC, United States
| | - Christine T. Chambers
- Departments of Psychology & Neuroscience and Pediatrics, Dalhousie University, and Centre for Pediatric Pain Research, IWK Health Centre, Halifax, NS, Canada
| | - Penney Cowan
- American Chronic Pain Association, Rocklin, CA, United States
| | - Robert R. Edwards
- Department of Anesthesiology, Harvard Medical School, Brigham & Women's Hospital, Boston, MA, United States
| | - James C. Eisenach
- Departments of Anesthesiology, Physiology and Pharmacology, Wake Forest University School of Medicine, Winston Salem, NC, United States
| | - John T. Farrar
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, PA, United States
| | - McKenzie Ferguson
- Southern Illinois University Edwardsville, School of Pharmacy, Edwardsville, IL, United States
| | - Laura P. Forsythe
- Patient-Centered Outcomes Research Institute (PCORI), Washington, DC, United States
| | - Roy Freeman
- Department of Neurology, Beth Israel Deaconess Medical Center, Boston, MA, United States
| | - Jennifer S. Gewandter
- Department of Anesthesiology and Perioperative Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| | - Ian Gilron
- Departments of Anesthesiology & Perioperative Medicine and Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Christine Goertz
- Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, NC, United States
| | | | - Smriti Iyengar
- Division of Translational Research, National Institute of Neurological Disorders and Stroke, Bethesda, MD, United States
| | - Isabel Jordan
- Departments of Psychology & Neuroscience and Pediatrics, Dalhousie University, and Centre for Pediatric Pain Research, IWK Health Centre, Halifax, NS, Canada
| | - Cornelia Kamp
- Center for Health and Technology/Clinical Materials Services Unit, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| | - Bethea A. Kleykamp
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Rachel L. Knowles
- Medical Research Council (part of UK Research and Innovation), London, United Kingdom
| | - Dale J. Langford
- Department of Anesthesiology, Critical Care & Pain Management, Hospital for Special Surgery, New York, NY, United States
| | - Sean Mackey
- Department of Anesthesiology, Perioperative, and Pain Medicine, Stanford University Medical Center, Stanford, CA, United States
| | | | - John Markman
- Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| | - Kathryn R. Martin
- Aberdeen Centre for Arthritis and Musculoskeletal Health, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, Scotland, United Kingdom
| | - Ewan McNicol
- Massachusetts College of Pharmacy and Health Sciences, Boston, MA, United States
| | - Kushang V. Patel
- Department of Anesthesiology & Pain Medicine, University of Washington, Seattle, WA, United States
| | - Andrew S.C. Rice
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Michael Rowbotham
- Departments of Anesthesia and Neurology, University of California San Francisco, San Francisco, CA, United States
| | - Friedhelm Sandbrink
- National Pain Management, Opioid Safety, and Prescription Drug Monitoring Program, Specialty Care Program Office, Veterans Health Administration, Washington, DC, United States
| | | | - Deborah J. Steiner
- Global Pain, Pain & Neurodegeneration, Eli Lilly and Company, Indianapolis, IN, United States
| | - Jan Vollert
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Münster, Germany
- Department of Neurophysiology, Mannheim Center for Translational Neuroscience MCTN, Medical Faculty Mannheim, Ruprecht Karls University, Heidelberg, Germany
| |
Collapse
|
2
|
Weiß M, Gründahl M, Jachnik A, Lampe EC, Malik I, Rittner HL, Sommer C, Hein G. The Effect of Everyday-Life Social Contact on Pain. J Med Internet Res 2024; 26:e53830. [PMID: 38687594 PMCID: PMC11094601 DOI: 10.2196/53830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 02/01/2024] [Accepted: 03/13/2024] [Indexed: 05/02/2024] Open
Abstract
Pain is a biopsychosocial phenomenon, resulting from the interplay between physiological and psychological processes and social factors. Given that humans constantly interact with others, the effect of social factors is particularly relevant. Documenting the significance of the social modulation of pain, an increasing number of studies have investigated the effect of social contact on subjective pain intensity and pain-related physiological changes. While evidence suggests that social contact can alleviate pain, contradictory findings indicate an increase in pain intensity and a deterioration of pain coping strategies. This evidence primarily stems from studies examining the effect of social contact on pain within highly controlled laboratory conditions. Moreover, pain assessments often rely on one-time subjective reports of average pain intensity across a predefined period. Ecological momentary assessments (EMAs) can circumvent these problems, as they can capture diverse aspects of behavior and experiences multiple times a day, in real time, with high resolution, and within naturalistic and ecologically valid settings. These multiple measures allow for the examination of fluctuations of pain symptoms throughout the day in relation to affective, cognitive, behavioral, and social factors. In this opinion paper, we review the current state and future relevance of EMA-based social pain research in daily life. Specifically, we examine whether everyday-life social support reduces or enhances pain. The first part of the paper provides a comprehensive overview of the use of EMA in pain research and summarizes the main findings. The review of the relatively limited number of existing EMA studies shows that the association between pain and social contact in everyday life depends on numerous factors, including pain syndromes, temporal dynamics, the nature of social interactions, and characteristics of the interaction partners. In line with laboratory research, there is evidence that everyday-life social contact can alleviate, but also intensify pain, depending on the type of social support. Everyday-life emotional support seems to reduce pain, while extensive solicitous support was found to have opposite effects. Moreover, positive short-term effects of social support can be overshadowed by other symptoms such as fatigue. Overall, gathering and integrating experiences from a patient's social environment can offer valuable insights. These insights can help interpret dynamics in pain intensity and accompanying symptoms such as depression or fatigue. We conclude that factors determining the reducing versus enhancing effects of social contact on pain need to be investigated more thoroughly. We advocate EMA as the assessment method of the future and highlight open questions that should be addressed in future EMA studies on pain and the potential of ecological momentary interventions for pain treatment.
Collapse
Affiliation(s)
- Martin Weiß
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| | - Marthe Gründahl
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| | - Annalena Jachnik
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| | - Emilia Caya Lampe
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| | - Ishitaa Malik
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| | - Heike Lydia Rittner
- University Hospital Würzburg, Center for Interdisciplinary Medicine, Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany
| | - Claudia Sommer
- University Hospital Würzburg, Department of Neurology, Würzburg, Germany
| | - Grit Hein
- University Hospital Würzburg, Center of Mental Health, Department of Psychiatry, Psychosomatic and Psychotherapy, Translational Social Neuroscience Unit, Würzburg, Germany
| |
Collapse
|
3
|
Barakat A, Munro G, Heegaard AM. Finding new analgesics: Computational pharmacology faces drug discovery challenges. Biochem Pharmacol 2024; 222:116091. [PMID: 38412924 DOI: 10.1016/j.bcp.2024.116091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 01/10/2024] [Accepted: 02/23/2024] [Indexed: 02/29/2024]
Abstract
Despite the worldwide prevalence and huge burden of pain, pain is an undertreated phenomenon. Currently used analgesics have several limitations regarding their efficacy and safety. The discovery of analgesics possessing a novel mechanism of action has faced multiple challenges, including a limited understanding of biological processes underpinning pain and analgesia and poor animal-to-human translation. Computational pharmacology is currently employed to face these challenges. In this review, we discuss the theory, methods, and applications of computational pharmacology in pain research. Computational pharmacology encompasses a wide variety of theoretical concepts and practical methodological approaches, with the overall aim of gaining biological insight through data acquisition and analysis. Data are acquired from patients or animal models with pain or analgesic treatment, at different levels of biological organization (molecular, cellular, physiological, and behavioral). Distinct methodological algorithms can then be used to analyze and integrate data. This helps to facilitate the identification of biological molecules and processes associated with pain phenotype, build quantitative models of pain signaling, and extract translatable features between humans and animals. However, computational pharmacology has several limitations, and its predictions can provide false positive and negative findings. Therefore, computational predictions are required to be validated experimentally before drawing solid conclusions. In this review, we discuss several case study examples of combining and integrating computational tools with experimental pain research tools to meet drug discovery challenges.
Collapse
Affiliation(s)
- Ahmed Barakat
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
| | | | - Anne-Marie Heegaard
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
4
|
Karimi SA, Zahra FT, Martin LJ. IUPHAR review: Navigating the role of preclinical models in pain research. Pharmacol Res 2024; 200:107073. [PMID: 38232910 DOI: 10.1016/j.phrs.2024.107073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
Chronic pain is a complex and challenging medical condition that affects millions of people worldwide. Understanding the underlying mechanisms of chronic pain is a key goal of preclinical pain research so that more effective treatment strategies can be developed. In this review, we explore nociception, pain, and the multifaceted factors that lead to chronic pain by focusing on preclinical models. We provide a detailed look into inflammatory and neuropathic pain models and discuss the most used animal models for studying the mechanisms behind these conditions. Additionally, we emphasize the vital role of these preclinical models in developing new pain-relief drugs, focusing on biologics and the therapeutic potential of NMDA and cannabinoid receptor antagonists. We also discuss the challenges of TRPV1 modulation for pain treatment, the clinical failures of neurokinin (NK)- 1 receptor antagonists, and the partial success story of Ziconotide to provide valuable lessons for preclinical pain models. Finally, we highlight the overall success and limitations of current treatments for chronic pain while providing critical insights into the development of more effective therapies to alleviate the burden of chronic pain.
Collapse
Affiliation(s)
- Seyed Asaad Karimi
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
| | - Fatama Tuz Zahra
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
| | - Loren J Martin
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.
| |
Collapse
|
5
|
Pickering G, O'Keeffe M, Bannister K, Becker S, Cottom S, Cox FJ, Eisenberg E, Finn DP, Graven-Nielsen T, Meeus M, Mouraux A, Tölle T, Garcia-Larrea L, Fullen BM. Why Europe needs a pain research strategy. Eur J Pain 2023; 27:1147-1149. [PMID: 37664971 DOI: 10.1002/ejp.2179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/29/2023] [Accepted: 08/07/2023] [Indexed: 09/05/2023]
Affiliation(s)
- Gisèle Pickering
- Platform of Clinical Investigation, Inserm CIC 1405, University Hospital, CHU Clermont- Ferrand, Ferrand, France
- Fundamental and Clinical Pharmacology of Pain, University Clermont Auvergne, Clermont- Ferrand, Ferrand, France
| | - Mary O'Keeffe
- Institute for Musculoskeletal Health, University of Sydney, Sydney, Australia
- European Pain Federation EFIC, Brussels, Belgium
| | - Kirsty Bannister
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Susanne Becker
- Clinical Psychology, Department of Experimental Psychology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Integrative Spinal Research, Department of Chiropractic Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | | | - Felicia J Cox
- Pain Management Service, Royal Brompton & Harefield hospitals, part of Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - Elon Eisenberg
- Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - David P Finn
- Pharmacology & Therapeutics, School of Medicine, Galway Neuroscience Centre and Centre for Pain Research, University of Galway, Galway, Ireland
| | - Thomas Graven-Nielsen
- Center for Neuroplasticity and Pain (CNAP), Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Mira Meeus
- Spine, Head and Pain Research Unit Ghent, Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
- Pain in Motion International Research Group, Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium
- Department of Rehabilitation Sciences and Physical Therapy, Faculty of Medicine and Health Sciences, MOVANT Research group, University of Antwerp, Antwerp, Belgium
- Institute of Neuroscience (IONS), UCLouvain, Brussels, Belgium
| | - Andre Mouraux
- Institute of Neuroscience (IONS), UCLouvain, Brussels, Belgium
| | - Thomas Tölle
- Department of Neurology, Technische Universität München, Munich, Germany
| | - Luis Garcia-Larrea
- Lyon Neurosciences Center Research Unit, Inserm U 1028, Pierre Wertheimer Hospital, Hospices Civils de Lyon, Lyon 1 University, Lyon, France
| | - Brona M Fullen
- UCD School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland
| |
Collapse
|
6
|
Bostrøm K, Børøsund E, Eide H, Varsi C, Kristjansdottir ÓB, Schreurs KMG, Waxenberg LB, Weiss KE, Morrison EJ, Stavenes Støle H, Cvancarova Småstuen M, Stubhaug A, Solberg Nes L. Short-Term Findings From Testing EPIO, a Digital Self-Management Program for People Living With Chronic Pain: Randomized Controlled Trial. J Med Internet Res 2023; 25:e47284. [PMID: 37624622 PMCID: PMC10492177 DOI: 10.2196/47284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/23/2023] [Accepted: 06/20/2023] [Indexed: 08/26/2023] Open
Abstract
BACKGROUND Chronic pain conditions involve numerous physical and psychological challenges, and while psychosocial self-management interventions can be of benefit for people living with chronic pain, such in-person treatment is not always accessible. Digital self-management approaches could improve this disparity, potentially bolstering outreach and providing easy, relatively low-cost access to pain self-management interventions. OBJECTIVE This randomized controlled trial aimed to evaluate the short-term efficacy of EPIO (ie, inspired by the Greek goddess for the soothing of pain, Epione), a digital self-management intervention, for people living with chronic pain. METHODS Patients (N=266) were randomly assigned to either the EPIO intervention (n=132) or a care-as-usual control group (n=134). Outcome measures included pain interference (Brief Pain Inventory; primary outcome measure), anxiety and depression (Hospital Anxiety and Depression Scale), self-regulatory fatigue (Self-Regulatory Fatigue 18 scale), health-related quality of life (SF-36 Short Form Health Survey), pain catastrophizing (Pain Catastrophizing Scale), and pain acceptance (Chronic Pain Acceptance Questionnaire). Linear regression models used change scores as the dependent variables. RESULTS The participants were primarily female (210/259, 81.1%), with a median age of 49 (range 22-78) years and a variety of pain conditions. Analyses (n=229) after 3 months revealed no statistically significant changes for the primary outcome of pain interference (P=.84), but significant reductions in the secondary outcomes of depression (mean difference -0.90; P=.03) and self-regulatory fatigue (mean difference -2.76; P=.008) in favor of the intervention group. No other statistically significant changes were observed at 3 months (all P>.05). Participants described EPIO as useful (ie, totally agree or agree; 95/109, 87.2%) and easy to use (101/109, 92.7%), with easily understandable exercises (106/109, 97.2%). CONCLUSIONS Evidence-informed, user-centered digital pain self-management interventions such as EPIO may have the potential to effectively support self-management and improve psychological functioning in the form of reduced symptoms of depression and improved capacity to regulate thoughts, feelings, and behavior for people living with chronic pain. TRIAL REGISTRATION ClinicalTrials.gov NCT03705104; https://clinicaltrials.gov/ct2/show/NCT03705104.
Collapse
Affiliation(s)
- Katrine Bostrøm
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Elin Børøsund
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Department of Nursing and Health Sciences, Faculty of Health and Social Sciences, University of South-Eastern Norway, Drammen, Norway
| | - Hilde Eide
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Centre for Health and Technology, Faculty of Health and Social Sciences, University of South-Eastern Norway, Drammen, Norway
| | - Cecilie Varsi
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Faculty of Health and Social Sciences, University of South-Eastern Norway, Drammen, Norway
| | - Ólöf Birna Kristjansdottir
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Norwegian National Advisory Unit on Learning and Mastery in Health, Oslo University Hospital, Oslo, Norway
- Mental Health Team West, Primary Care of the Capital area, Reykjavik, Iceland
| | - Karlein M G Schreurs
- Department of Psychology, Health & Technology, University of Twente, Enschede, Netherlands
| | - Lori B Waxenberg
- Department of Clinical and Health Psychology, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | - Karen E Weiss
- Department of Psychiatry and Psychology, College of Medicine and Science, Mayo Clinic, Rochester, MN, United States
| | - Eleshia J Morrison
- Department of Psychiatry and Psychology, College of Medicine and Science, Mayo Clinic, Rochester, MN, United States
| | - Hanne Stavenes Støle
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Department of Child Health and Development, Norwegian Institute of Public Health, Oslo, Norway
| | | | - Audun Stubhaug
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Pain Management and Research, Oslo University Hospital, Oslo, Norway
- Regional Advisory Unit on Pain, Oslo University Hospital, Oslo, Norway
| | - Lise Solberg Nes
- Department of Digital Health Research, Division of Medicine, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Psychiatry and Psychology, College of Medicine and Science, Mayo Clinic, Rochester, MN, United States
| |
Collapse
|
7
|
Dent JO, Segal JP, Brécier A, Gowdy HGM, Dubois RM, Bannerman CA, Halievski K, Silva JR, Ghasemlou N. Advanced Dynamic Weight Bearing as an Observer-independent Measure of Hyperacute Hypersensitivity in Mice. Can J Pain 2023; 7:2249060. [PMID: 37885834 PMCID: PMC10599184 DOI: 10.1080/24740527.2023.2249060] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 07/16/2023] [Indexed: 10/28/2023]
Abstract
Background Standard methods assessing pain in rodents are often observer dependent, potentially resulting in biased outcomes. Advanced dynamic weight bearing (ADWB) offers an observer-independent approach that can provide objective, reliable data in preclinical pain research. Aims The aim of this study was to characterize the use of ADWB in assessing murine responses to allyl isothiocyanate (AITC)-induced hyperacute hypersensitivity and identify best practices for use of the device. Methods Male C57BL/6J mice received intraplantar injections of saline or 0.1% AITC solution and were assessed using the ADWB system; simultaneous observer-dependent durations of paw licking and biting were measured. ADWB data were analyzed using the proprietary software from Bioseb and correlated to observer-dependent results, with parameters assessed to optimize data collected. Results ADWB detected pain-directed changes in weight and surface area distribution in AITC-treated mice, with paw weight and surface area placement correlating to paw licking and biting. Optimization of adjustable threshold parameters allowed for reduced coefficients of variability and increased duration of validated data. Conclusions The ADWB assay provides an efficient and unbiased measure of chemical-induced hyperacute hypersensitivity in mice. ADWB detection parameters influence amount of validated data and variability, a consideration for data analysis in future studies.
Collapse
Affiliation(s)
- Jayne O. Dent
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Julia P. Segal
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Aurélie Brécier
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
- Department of Anesthesiology & Perioperative Medicine, Kingston Health Sciences Centre, Kingston, Ontario, Canada
| | - Hailey G. M. Gowdy
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Rosalin M. Dubois
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Courtney A. Bannerman
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Katherine Halievski
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Jaqueline R. Silva
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
- Department of Anesthesiology & Perioperative Medicine, Kingston Health Sciences Centre, Kingston, Ontario, Canada
| | - Nader Ghasemlou
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
- Department of Anesthesiology & Perioperative Medicine, Kingston Health Sciences Centre, Kingston, Ontario, Canada
- Centre for Neuroscience Studies, Queen's University, Kingston, Ontario, Canada
| |
Collapse
|
8
|
Tafelski S, Wandrey JD, Shaqura M, Hong X, Beyer A, Schäfer M, Mousa SA. Translation of Experimental Findings from Animal to Human Biology: Identification of Neuronal Mineralocorticoid and Glucocorticoid Receptors in a Sectioned Main Nerve Trunk of the Leg. Cells 2023; 12:1785. [PMID: 37443819 PMCID: PMC10340435 DOI: 10.3390/cells12131785] [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: 05/22/2023] [Revised: 06/26/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
The activation of the mineralocorticoid (MR) and glucocorticoid (GR) receptors on peripheral sensory neurons seems to modify pain perception through both direct non-genomic and indirect genomic pathways. These distinct subpopulations of sensory neurons are not known for peripheral human nerves. Therefore, we examined MR and GR on subpopulations of sensory neurons in sectioned human and rat peripheral nerves. Real-time PCR (RT-PCR) and double immunofluorescence confocal analysis of MR and GR with the neuronal markers PGP9.5, neurofilament 200 (NF200), and the potential pain signaling molecules CGRP, Nav1.8, and TRPV1 were performed in human and rat nerve tissue. We evaluated mechanical hyperalgesia after intrathecal administration of GR and MR agonists. We isolated MR- and GR-specific mRNA from human peripheral nerves using RT-PCR. Our double immunofluorescence analysis showed that the majority of GR colocalized with NF200 positive, myelinated, mechanoreceptive A-fibers and, to a lesser extent, with peripheral peptidergic CGRP-immunoreactive sensory nerve fibers in humans and rats. However, the majority of MR colocalized with CGRP in rat as well as human nerve tissue. Importantly, there was an abundant colocalization of MR with the pain signaling molecules TRPV1, CGRP, and Nav1.8 in human as well as rat nerve tissue. The intrathecal application of the GR agonist reduced, and intrathecal administration of an MR agonist increased, mechanical hyperalgesia in rats. Altogether, these findings support a translational approach in mammals that aims to explain the modulation of sensory information through MR and GR activation. Our findings show a significant overlap between humans and rats in MR and GR expression in peripheral sensory neurons.
Collapse
Affiliation(s)
- Sascha Tafelski
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| | - Jan D. Wandrey
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| | - Mohammed Shaqura
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| | - Xueqi Hong
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| | - Antje Beyer
- Department of Anaesthesiology, Ludwig-Maximilians-University Munich, 80539 Munich, Germany
| | - Michael Schäfer
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| | - Shaaban A. Mousa
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Operative Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charitéplatz 1, 10117 Berlin, Germany
| |
Collapse
|
9
|
Behavioral Voluntary and Social Bioassays Enabling Identification of Complex and Sex-Dependent Pain-(-Related) Phenotypes in Rats with Bone Cancer. Cancers (Basel) 2023; 15:cancers15051565. [PMID: 36900357 PMCID: PMC10000428 DOI: 10.3390/cancers15051565] [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: 12/22/2022] [Revised: 02/06/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Cancer-induced bone pain (CIBP) is a common and devastating symptom with limited treatment options in patients, significantly affecting their quality of life. The use of rodent models is the most common approach to uncovering the mechanisms underlying CIBP; however, the translation of results to the clinic may be hindered because the assessment of pain-related behavior is often based exclusively on reflexive-based methods, which are only partially indicative of relevant pain in patients. To improve the accuracy and strength of the preclinical, experimental model of CIBP in rodents, we used a battery of multimodal behavioral tests that were also aimed at identifying rodent-specific behavioral components by using a home-cage monitoring assay (HCM). Rats of all sexes received an injection with either heat-deactivated (sham-group) or potent mammary gland carcinoma Walker 256 cells into the tibia. By integrating multimodal datasets, we assessed pain-related behavioral trajectories of the CIBP-phenotype, including evoked and non-evoked based assays and HCM. Using principal component analysis (PCA), we discovered sex-specific differences in establishing the CIBP-phenotype, which occurred earlier (and differently) in males. Additionally, HCM phenotyping revealed the occurrence of sensory-affective states manifested by mechanical hypersensitivity in sham when housed with a tumor-bearing cagemate (CIBP) of the same sex. This multimodal battery allows for an in-depth characterization of the CIBP-phenotype under social aspects in rats. The detailed, sex-specific, and rat-specific social phenotyping of CIBP enabled by PCA provides the basis for mechanism-driven studies to ensure robustness and generalizability of results and provide information for targeted drug development in the future.
Collapse
|
10
|
Segelcke D, van der Burgt M, Kappert C, Schmidt Garcia D, Sondermann JR, Bigalke S, Pradier B, Gomez-Varela D, Zahn PK, Schmidt M, Pogatzki-Zahn EM. Phenotype- and species-specific skin proteomic signatures for incision-induced pain in humans and mice. Br J Anaesth 2023; 130:331-342. [PMID: 36609060 DOI: 10.1016/j.bja.2022.10.040] [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: 05/24/2022] [Revised: 10/24/2022] [Accepted: 10/24/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Acute pain after surgery is common and often leads to chronic post-surgical pain, but neither treatment nor prevention is currently sufficient. We hypothesised that specific protein networks (protein-protein interactions) are relevant for pain after surgery in humans and mice. METHODS Standardised surgical incisions were performed in male human volunteers and male mice. Quantitative and qualitative sensory phenotyping were combined with unbiased quantitative mass spectrometry-based proteomics and protein network theory. The primary outcomes were skin protein signature changes in humans and phenotype-specific protein-protein interaction analysis 24 h after incision. Secondary outcomes were interspecies comparison of protein regulation as well as protein-protein interactions after incision and validation of selected proteins in human skin by immunofluorescence. RESULTS Skin biopsies in 21 human volunteers revealed 119/1569 regulated proteins 24 h after incision. Protein-protein interaction analysis delineated remarkable differences between subjects with small (low responders, n=12) and large incision-related hyperalgesic areas (high responders, n=7), a phenotype most predictive of developing chronic post-surgical pain. Whereas low responders predominantly showed an anti-inflammatory protein signature, high responders exhibited signatures associated with a distinct proteolytic environment and persistent inflammation. Compared to humans, skin biopsies in mice habored even more regulated proteins (435/1871) 24 h after incision with limited overlap between species as assessed by proteome dynamics and PPI. Immunohistochemistry confirmed the expression of high priority candidates in human skin biopsies. CONCLUSIONS Proteome profiling of human skin after incision revealed protein-protein interactions correlated with pain and hyperalgesia, which may be of potential significance for preventing chronic post-surgical pain. Importantly, protein-protein interactions were differentially modulated in mice compared to humans opening new avenues for successful translational research.
Collapse
Affiliation(s)
- Daniel Segelcke
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany
| | - Max van der Burgt
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany
| | - Christin Kappert
- Max Planck Institute for Multidisciplinary Sciences, City Campus, Goettingen, Germany
| | | | - Julia R Sondermann
- Division of Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Stephan Bigalke
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany; Clinic for Anaesthesiology, Intensive and Pain Medicine, Ruhr-University Bochum, BG-University Hospital Bergmannsheil gGmbH, Bochum, Germany
| | - Bruno Pradier
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany
| | - David Gomez-Varela
- Division of Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Peter K Zahn
- Clinic for Anaesthesiology, Intensive and Pain Medicine, Ruhr-University Bochum, BG-University Hospital Bergmannsheil gGmbH, Bochum, Germany
| | - Manuela Schmidt
- Division of Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria.
| | - Esther M Pogatzki-Zahn
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany.
| |
Collapse
|
11
|
Bäckryd E. What do we mean by "mechanism" in pain medicine? Scand J Pain 2023; 23:1-2. [PMID: 35977154 DOI: 10.1515/sjpain-2022-0062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Emmanuel Bäckryd
- Pain and Rehabilitation Center, and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| |
Collapse
|
12
|
Begley EK, Poole HM, Sumnall HR, Frank BF, Montgomery C. Opioid prescribing and social deprivation: A retrospective analysis of prescribing for CNCP in Liverpool CCG. PLoS One 2023; 18:e0280958. [PMID: 36888607 PMCID: PMC9994720 DOI: 10.1371/journal.pone.0280958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 01/12/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND Treating Chronic Non-Cancer Pain (CNCP) with long-term, high dose and more potent opioids puts patients at increased risk of harm, whilst providing limited pain relief. Socially deprived areas mapped from Index of Multiple Deprivation (IMD) scores show higher rates of high dose, strong opioid prescribing compared to more affluent areas. OBJECTIVE To explore if opioid prescribing is higher in more deprived areas of Liverpool (UK) and assess the incidence of high dose prescribing to improve clinical pathways for opioid weaning. DESIGN AND SETTING This retrospective observational study used primary care practice and patient level opioid prescribing data for N = 30,474 CNCP patients across Liverpool Clinical Commissioning Group (LCCG) between August 2016 and August 2018. METHOD A Defined Daily Dose (DDD) was calculated for each patient prescribed opioids. DDD was converted into a Morphine Equivalent Dose (MED) and patients stratified according to high (≥120mg) MED cut off. The association between prescribing and deprivation was analysed by linking GP practice codes and IMD scores across LCCG. RESULTS 3.5% of patients were prescribed an average dose above 120mg MED/day. Patients prescribed long-term, high dose, strong opioids were more likely to be female, aged 60+, prescribed three opioids and reside in the North of Liverpool where there is a higher density of areas in the IMD most deprived deciles. CONCLUSION A small but significant proportion of CNCP patients across Liverpool are currently prescribed opioids above the recommended dose threshold of 120mg MED. Identification of fentanyl as a contributor to high dose prescribing resulted in changes to prescribing practice, and reports from NHS pain clinics that fewer patients require tapering from fentanyl. In conclusion, higher rates of high dose opioid prescribing continue to be evident in more socially deprived areas further increasing health inequalities.
Collapse
Affiliation(s)
- Emma K. Begley
- School of Psychology, Liverpool John Moores University, Liverpool, Merseyside, United Kingdom
| | - Helen M. Poole
- School of Psychology, Liverpool John Moores University, Liverpool, Merseyside, United Kingdom
| | - Harry R. Sumnall
- Public Health Institute, Liverpool John Moores University, Liverpool, Merseyside, United Kingdom
| | - Bernhard F. Frank
- Walton Centre NHS Foundation Trust, Liverpool, Merseyside, United Kingdom
- Pain Research Institute, University of Liverpool, Liverpool, Merseyside, United Kingdom
| | - Catharine Montgomery
- School of Psychology, Liverpool John Moores University, Liverpool, Merseyside, United Kingdom
- * E-mail:
| |
Collapse
|
13
|
Su PYP, Zhang L, He L, Zhao N, Guan Z. The Role of Neuro-Immune Interactions in Chronic Pain: Implications for Clinical Practice. J Pain Res 2022; 15:2223-2248. [PMID: 35957964 PMCID: PMC9359791 DOI: 10.2147/jpr.s246883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/19/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Po-Yi Paul Su
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA
| | - Lingyi Zhang
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA
- Department of Anesthesiology, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
| | - Liangliang He
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA
- Department of Pain Management, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
| | - Na Zhao
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA
| | - Zhonghui Guan
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA
- Correspondence: Zhonghui Guan, Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA, USA, Tel +415.885.7246, Fax +415.885.7575, Email
| |
Collapse
|
14
|
Whiting ZM, Yin J, de la Harpe SM, Vernall AJ, Grimsey NL. Developing the Cannabinoid Receptor 2 (CB2) pharmacopoeia: past, present, and future. Trends Pharmacol Sci 2022; 43:754-771. [PMID: 35906103 DOI: 10.1016/j.tips.2022.06.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 12/28/2022]
Abstract
Cannabinoid Receptor 2 (CB2) is a G protein-coupled receptor (GPCR) with considerable, though as yet unrealised, therapeutic potential. Promising preclinical data supports the applicability of CB2 activation in autoimmune and inflammatory diseases, pain, neurodegeneration, and osteoporosis. A diverse pharmacopoeia of cannabinoid ligands is available, which has led to considerable advancements in the understanding of CB2 function and extensive preclinical evaluation. However, until recently, most CB2 ligands were highly lipophilic and as such not optimal for clinical application due to unfavourable physicochemical properties. A number of strategies have been applied to develop CB2 ligands to achieve closer to 'drug-like' properties and a few such compounds have now undergone clinical trial. We review the current state of CB2 ligand development and progress in optimising physicochemical properties, understanding advanced molecular pharmacology such as functional selectivity, and clinical evaluation of CB2-targeting compounds.
Collapse
Affiliation(s)
- Zak M Whiting
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand; Centre for Brain Research, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Jiazhen Yin
- Department of Chemistry, Division of Sciences, University of Otago, Dunedin, New Zealand
| | - Sara M de la Harpe
- Department of Chemistry, Division of Sciences, University of Otago, Dunedin, New Zealand
| | - Andrea J Vernall
- Department of Chemistry, Division of Sciences, University of Otago, Dunedin, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand
| | - Natasha L Grimsey
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand; Centre for Brain Research, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand.
| |
Collapse
|
15
|
Tappe-Theodor A, Pitzer C, Lewejohann L, Jirkof P, Siegeler K, Segelcke A, Drude N, Pradier B, Pogatzki-Zahn E, Hollinderbäumer B, Segelcke D. The “WWHow” Concept for Prospective Categorization of Post-operative Severity Assessment in Mice and Rats. Front Vet Sci 2022; 9:841431. [PMID: 35372532 PMCID: PMC8964947 DOI: 10.3389/fvets.2022.841431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/09/2022] [Indexed: 11/13/2022] Open
Abstract
The prospective severity assessment in animal experiments in the categories' non-recovery, mild, moderate, and severe is part of each approval process and serves to estimate the harm/benefit. Harms are essential for evaluating ethical justifiability, and on the other hand, they may represent confounders and effect modifiers within an experiment. Catalogs and guidelines provide a way to assess the experimental severity prospectively but are limited in adaptation due to their nature of representing particular examples without clear explanations of the assessment strategies. To provide more flexibility for current and future practices, we developed the modular Where-What-How (WWHow) concept, which applies findings from pre-clinical studies using surgical-induced pain models in mice and rats to provide a prospective severity assessment. The WWHow concept integrates intra-operative characteristics for predicting the maximum expected severity of surgical procedures. The assessed severity categorization is mainly congruent with examples in established catalogs; however, because the WWHow concept is based on anatomical location, detailed analysis of the tissue trauma and other intra-operative characteristics, it enables refinement actions, provides the basis for a fact-based dialogue with authority officials and other stakeholders, and helps to identify confounder factors of study findings.
Collapse
Affiliation(s)
- Anke Tappe-Theodor
- Institute of Pharmacology, University of Heidelberg, Heidelberg, Germany
| | - Claudia Pitzer
- Interdisciplinary Neurobehavioral Core, University of Heidelberg, Heidelberg, Germany
| | - Lars Lewejohann
- Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science, Freie Universität Berlin, Berlin, Germany
- German Federal Institute for Risk Assessment (BfR), German Center for the Protection of Laboratory Animals (Bf3R), Berlin, Germany
| | - Paulin Jirkof
- Office for Animal Welfare and 3Rs, University of Zurich, Zurich, Switzerland
| | - Katja Siegeler
- Department of Work and Environmental Protection, Westphalian Wilhelms University Muenster, Münster, Germany
| | | | - Natascha Drude
- Berlin Institute of Health (BIH) at Charité, QUEST Center for Responsible Research, Berlin, Germany
| | - Bruno Pradier
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Münster, Germany
| | - Esther Pogatzki-Zahn
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Münster, Germany
| | | | - Daniel Segelcke
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Münster, Germany
- *Correspondence: Daniel Segelcke
| |
Collapse
|
16
|
Kerckhove N, Delage N, Cambier S, Cantagrel N, Serra E, Marcaillou F, Maindet C, Picard P, Martiné G, Deleens R, Trouvin AP, Fourel L, Espagne-Dubreuilh G, Douay L, Foulon S, Dufraisse B, Gov C, Viel E, Jedryka F, Pouplin S, Lestrade C, Combe E, Perrot S, Perocheau D, De Brisson V, Vergne-Salle P, Mertens P, Pereira B, Djiberou Mahamadou AJ, Antoine V, Corteval A, Eschalier A, Dualé C, Attal N, Authier N. eDOL mHealth App and Web Platform for Self-monitoring and Medical Follow-up of Patients With Chronic Pain: Observational Feasibility Study. JMIR Form Res 2022; 6:e30052. [PMID: 35234654 PMCID: PMC8928045 DOI: 10.2196/30052] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/14/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Chronic pain affects approximately 30% of the general population, severely degrades quality of life (especially in older adults) and professional life (inability or reduction in the ability to work and loss of employment), and leads to billions in additional health care costs. Moreover, available painkillers are old, with limited efficacy and can cause significant adverse effects. Thus, there is a need for innovation in the management of chronic pain. Better characterization of patients could help to identify the predictors of successful treatments, and thus, guide physicians in the initial choice of treatment and in the follow-up of their patients. Nevertheless, current assessments of patients with chronic pain provide only fragmentary data on painful daily experiences. Real-life monitoring of subjective and objective markers of chronic pain using mobile health (mHealth) programs can address this issue. OBJECTIVE We hypothesized that regular patient self-monitoring using an mHealth app would lead physicians to obtain deeper understanding and new insight into patients with chronic pain and that, for patients, regular self-monitoring using an mHealth app would play a positive therapeutic role and improve adherence to treatment. We aimed to evaluate the feasibility and acceptability of a new mHealth app called eDOL. METHODS We conducted an observational study to assess the feasibility and acceptability of the eDOL tool. Patients completed several questionnaires using the tool over a period of 2 weeks and repeated assessments weekly over a period of 3 months. Physicians saw their patients at a follow-up visit that took place at least 3 months after the inclusion visit. A composite criterion of the acceptability and feasibility of the eDOL tool was calculated after the completion of study using satisfaction surveys from both patients and physicians. RESULTS Data from 105 patients (of 133 who were included) were analyzed. The rate of adherence was 61.9% (65/105) after 3 months. The median acceptability score was 7 (out of 10) for both patients and physicians. There was a high rate of completion of the baseline questionnaires and assessments (mean 89.3%), and a low rate of completion of the follow-up questionnaires and assessments (63.8% (67/105) and 61.9% (65/105) respectively). We were also able to characterize subgroups of patients and determine a profile of those who adhered to eDOL. We obtained 4 clusters that differ from each other in their biopsychosocial characteristics. Cluster 4 corresponds to patients with more disabling chronic pain (daily impact and comorbidities) and vice versa for cluster 1. CONCLUSIONS This work demonstrates that eDOL is highly feasible and acceptable for both patients with chronic pain and their physicians. It also shows that such a tool can integrate many parameters to ensure the detailed characterization of patients for future research works and pain management. TRIAL REGISTRATION ClinicalTrial.gov NCT03931694; http://clinicaltrials.gov/ct2/show/NCT03931694.
Collapse
Affiliation(s)
- Nicolas Kerckhove
- Service de Pharmacologie médicale, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Noémie Delage
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Sébastien Cambier
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Nathalie Cantagrel
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Eric Serra
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire d'Amiens, Amiens, France
| | - Fabienne Marcaillou
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Caroline Maindet
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Grenoble, Grenoble, France
| | - Pascale Picard
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Gaelle Martiné
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Rodrigue Deleens
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Rouen, Rouen, France
| | - Anne-Priscille Trouvin
- Centre d'évaluation et de traitement de la douleur, Assistance Publique-Hôpitaux de Paris Cochin, Paris, France
| | - Lauriane Fourel
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Régional de Bayeux, Bayeux, France
| | - Gaelle Espagne-Dubreuilh
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Ludovic Douay
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire d'Amiens, Amiens, France
| | - Stéphane Foulon
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire d'Amiens, Amiens, France
| | - Bénédicte Dufraisse
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Christian Gov
- Centre d'évaluation et de traitement de la douleur, Hospices Civils de Lyon Pierre Wertheimer, Lyon, France
| | - Eric Viel
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
| | - François Jedryka
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Nîmes, Nîmes, France
| | - Sophie Pouplin
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Rouen, Rouen, France
| | - Cécile Lestrade
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Emmanuel Combe
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Serge Perrot
- Centre d'évaluation et de traitement de la douleur, Assistance Publique-Hôpitaux de Paris Cochin, Paris, France
| | - Dominique Perocheau
- Centre d'évaluation et de traitement de la douleur, Assistance Publique-Hôpitaux de Paris Cochin, Paris, France
| | - Valentine De Brisson
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Régional de Bayeux, Bayeux, France
| | - Pascale Vergne-Salle
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Patrick Mertens
- Centre d'évaluation et de traitement de la douleur, Hospices Civils de Lyon Pierre Wertheimer, Lyon, France
| | - Bruno Pereira
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | | | - Violaine Antoine
- Laboratoire d'Informatique, de Modélisation et d'Optimisation des Systèmes, Université Clermont Auvergne, Aubière, France
| | | | | | - Christian Dualé
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Nadine Attal
- Institut National de la Santé et de la Recherche Médicale, Unité 987 - Centre d'évaluation et de traitement de la douleur, Assistance Publique-Hôpitaux de Paris Ambroise Paré, Paris, France
| | - Nicolas Authier
- Centre d'évaluation et de traitement de la douleur, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| |
Collapse
|
17
|
Poulsen AH, van den Berg B, Arguissain FG, Tigerholm J, Buitenweg JR, Andersen OK, Mørch CD. Novel surface electrode design for preferential activation of cutaneous nociceptors. J Neural Eng 2022; 19. [PMID: 34996054 DOI: 10.1088/1741-2552/ac4950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 01/07/2022] [Indexed: 11/11/2022]
Abstract
Objective Small area electrodes enable preferential activation of nociceptive fibers. It is debated, however, whether co-activation of large fibers still occurs for the existing electrode designs. Moreover, existing electrodes are limited to low stimulation intensities, for which behavioral and physiological responses may be considered less reliable. A recent optimization study showed that there is a potential for improving electrode performance and increase the range of possible stimulation intensities. Based on those results, the present study introduces and tests a novel planar concentric array electrode design for small fiber activation in healthy volunteers. Approach Volunteers received electrical stimulation with the planar concentric array electrode and a regular patch electrode. Perception thresholds were estimated at the beginning and the end of the experiment. Evoked cortical potentials were recorded in blocks of 30 stimuli. For the patch, stimulation intensity was set to two times perception threshold (PT), while three intensities, 2, 5, and 10 times PT, were applied with the planar concentric array electrode. Sensation quality, numerical-rating scores, and reaction times were obtained for each PT estimation and during each block of evoked potential recordings. Main results Stimulation with the patch electrode was characterized as dull, while stimulation with the planar concentric array electrode was characterized as sharp, with increased sharpness for increasing stimulus intensity. Likewise, NRS scores were higher for the planar concentric array electrode compared to the patch and increased with increasing stimulation intensity. Reaction times and ERP latencies were longer for the planar concentric array electrode compared to the patch. Significance The presented novel planar concentric array electrode is a small, non-invasive, and single-use electrode that has the potential to investigate small fiber neuropathy and pain mechanisms, as it is small fiber preferential for a wide range of stimulation intensities.
Collapse
Affiliation(s)
- Aida Hejlskov Poulsen
- Department of Health science and technology, Aalborg Universitet Det Sundhedsvidenskabelige Fakultet, Fredrik bajers vej, 7 A1, 208, Aalborg, Nordjylland, 9220, DENMARK
| | - Boudewijn van den Berg
- University of Twente Technical Medical Centre, PO box 217, 7500 AE Enschede, The Netherlands, Enschede, 7500, NETHERLANDS
| | - Federico G Arguissain
- Department of Health Science and Technology, Aalborg Universitet Det Sundhedsvidenskabelige Fakultet, Fredrik Bajers Vej 7A, Aalborg, 9220, DENMARK
| | - Jenny Tigerholm
- Health Science and Technology, Aalborg University, Fredrik Bajers vej 7A, Aalborg, 9220, DENMARK
| | - Jan R Buitenweg
- EWI - TST, University of Twente, PO Box 217, 7500 AE Enchende, The Netherlands, Enschende, 7500, NETHERLANDS
| | - Ole Kaeseler Andersen
- Department of Health Science and Technology, Aalborg Universitet Det Sundhedsvidenskabelige Fakultet, Fredrik Bajers Vej 7, 9220 Aalborg, Aalborg, 9220, DENMARK
| | - Carsten Dahl Mørch
- Department of Health Science and Technology, Aalborg Universitet Det Sundhedsvidenskabelige Fakultet, Fredrik Bajers Vej 7 A, Aalborg, 9220, DENMARK
| |
Collapse
|
18
|
Ao Z, Cai H, Wu Z, Krzesniak J, Tian C, Lai YY, Mackie K, Guo F. Human Spinal Organoid-on-a-Chip to Model Nociceptive Circuitry for Pain Therapeutics Discovery. Anal Chem 2021; 94:1365-1372. [PMID: 34928595 DOI: 10.1021/acs.analchem.1c04641] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The discovery of new pain therapeutics targeting human nociceptive circuitry is an emerging, exciting, and rewarding field. However, current models for evaluating prospective new therapeutics [e.g., animals and two-dimensional (2D) in vitro cultures] fail to fully recapitulate the complexity of human nociceptive neuron and dorsal horn neuron biology, significantly limiting the development of novel pain therapeutics. Here, we report human spinal organoid-on-a-chip devices for modeling the biology and electrophysiology of human nociceptive neurons and dorsal horn interneurons in nociceptive circuitry. Our device can be simply made through the integration of a membrane with a three-dimensional (3D)-printed organoid holder. By combining air-liquid interface culture and spinal organoid protocols, our devices can differentiate human stem cells into human sensori-spinal-cord organoids with dorsal spinal cord interneurons and sensory neurons. By easily transferring from culture well plates to the multiple-electrode array (MEA) system, our device also allows the plug-and-play measurement of organoid activity for testing nociceptive modulators (e.g., mustard oil, capsaicin, velvet ant venom, etc.). Our organoid-on-a-chip devices are cost-efficient, scalable, easy to use, and compatible with conventional well plates, allowing the plug-and-play measurement of spinal organoid electrophysiology. By the integration of human sensory-spinal-cord organoids with our organoid-on-a-chip devices, our method may hold the promising potential to screen and validate novel therapeutics for human pain medicine discovery.
Collapse
Affiliation(s)
- Zheng Ao
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| | - Hongwei Cai
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| | - Zhuhao Wu
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| | - Jonathan Krzesniak
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| | - Chunhui Tian
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| | - Yvonne Y Lai
- Gill Center for Biomolecular Science, and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, United States
| | - Ken Mackie
- Gill Center for Biomolecular Science, and Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, United States
| | - Feng Guo
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
19
|
Segelcke D, Pradier B, Reichl S, Schäfer LC, Pogatzki-Zahn EM. Investigating the Role of Ly6G+ Neutrophils in Incisional and Inflammatory Pain by Multidimensional Pain-Related Behavioral Assessments: Bridging the Translational Gap. FRONTIERS IN PAIN RESEARCH 2021; 2:735838. [PMID: 35295496 PMCID: PMC8915677 DOI: 10.3389/fpain.2021.735838] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/09/2021] [Indexed: 12/27/2022] Open
Abstract
In recent years, preclinical pain research has failed to develop genuinely new analgesics for clinical use. This fact is reflected by a high number of patients, limited drug efficacy accompanied by side effects, and a long-term opioid intake. Two main aspects have been addressed, which hinder translation: the use of non-relevant pain models and a mismatch between pain-related outcomes in preclinical and clinical studies. Conversely, disease-specific pain models that mirror more closely the clinical situation and multidimensional behavioral outcome measures that objectively and reproducibly assess relevant pain-related symptoms in a preclinical setting could improve translation. Mechanistically, a matter of debate is the role of Ly6G+ neutrophil granulocytes (NGs) for pain. NGs are essential to eliminate pathogens and promote the wound healing process. For this purpose, there is a need to release various pro- and anti-inflammatory mediators, some of which could ameliorate or enhance pain. However, the contribution of NGs to different pain entities is contradictory for reflex-based tests, and completely unknown in the context of non-evoked pain (NEP) and movement-evoked pain (MEP). First, we combined withdrawal reflex-based assays with novel video-based assessments for NEP- and MEP-related behavior in two mouse pain models. The pain models utilized in this study were incision (INC) and pathogen/adjuvant-induced inflammation (CFA), translating well to postsurgical and inflammatory pain entities. Second, we depleted NGs and applied a set of behavioral assessments to investigate the role of NG migration in different pain modalities. Our comprehensive behavioral approach identified pain-related behaviors in mice that resemble (NEP) or differentiate (MEP) behavioral trajectories in comparison to mechanical and heat hypersensitivity, thereby indicating modality-dependent mechanisms. Further, we show that injury-induced accumulation of NGs minimally affects pain-related behaviors in both pain models. In conclusion, we report a novel assessment to detect NEP in mice after unilateral injuries using a more unbiased approach. Additionally, we are capable of detecting an antalgic gait for both pain entities with unique trajectories. The different trajectories between MEP and other pain modalities suggest that the underlying mechanisms differ. We further conclude that NGs play a subordinate role in pain-related behaviors in incisional and inflammatory pain.
Collapse
Affiliation(s)
- Daniel Segelcke
- Department for Anesthesiology, Operative Intensive Care and Pain Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
| | - Bruno Pradier
- Department for Anesthesiology, Operative Intensive Care and Pain Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
| | - Sylvia Reichl
- Department for Anesthesiology, Operative Intensive Care and Pain Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
- Department of Anesthesiology, Perioperative Medicine, Paracelsus Medical University, Salzburg, Austria
| | - Lukas C. Schäfer
- Department for Anesthesiology, Operative Intensive Care and Pain Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
| | - Esther M. Pogatzki-Zahn
- Department for Anesthesiology, Operative Intensive Care and Pain Medicine, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
- *Correspondence: Esther M. Pogatzki-Zahn
| |
Collapse
|
20
|
Haroutounian S, Arendt-Nielsen L, Belton J, Blyth FM, Degenhardt L, Forti MD, Eccleston C, Finn DP, Finnerup NB, Fisher E, Fogarty AE, Gilron I, Hohmann AG, Kalso E, Krane E, Mohiuddin M, Moore RA, Rowbotham M, Soliman N, Wallace M, Zinboonyahgoon N, Rice ASC. International Association for the Study of Pain Presidential Task Force on Cannabis and Cannabinoid Analgesia: research agenda on the use of cannabinoids, cannabis, and cannabis-based medicines for pain management. Pain 2021; 162:S117-S124. [PMID: 34138827 PMCID: PMC8855877 DOI: 10.1097/j.pain.0000000000002266] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/10/2021] [Indexed: 01/08/2023]
Abstract
ABSTRACT The President of the International Association for the Study of Pain established a task force on cannabis and cannabinoid analgesia to systematically examine the evidence on (1) analgesic pharmacology of cannabinoids and preclinical evidence on their efficacy in animal models of injury-related or pathological persistent pain; (2) the clinical efficacy of cannabis, cannabinoids, and cannabis-based medicines for pain; (3) harms related to long-term use of cannabinoids; as well as (4) societal issues and policy implications related to the use of these compounds for pain management. Here, we summarize key knowledge gaps identified in the task force outputs and propose a research agenda for generating high-quality evidence on the topic. The systematic assessment of preclinical and clinical literature identified gaps in rigor of study design and reporting across the translational spectrum. We provide recommendations to improve the quality, rigor, transparency, and reproducibility of preclinical and clinical research on cannabis and cannabinoids for pain, as well as for the conduct of systematic reviews on the topic. Gaps related to comprehensive understanding of the endocannabinoid system and cannabinoid pharmacology, including pharmacokinetics and drug formulation aspects, are discussed. We outline key areas where high-quality clinical trials with cannabinoids are needed. Remaining important questions about long-term and short-term safety of cannabis and cannabinoids are emphasized. Finally, regulatory, societal, and policy challenges associated with medicinal and nonmedicinal use of cannabis are highlighted, with recommendations for improving patient safety and reducing societal harms in the context of pain management.
Collapse
Affiliation(s)
- Simon Haroutounian
- Division of Clinical and Translational Research and Washington University Pain Center. Department of Anesthesiology, Washington University School of Medicine. St Louis, MO, USA
| | - Lars Arendt-Nielsen
- Center for Neuroplasticity and Pain (CNAP) and Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, School of Medicine, Aalborg University, Aalborg, Denmark
| | - Joletta Belton
- Endless Possibilities Initiative, Fraser, CO, USA; Global Alliance of Pain Patient Advocates (GAPPA) Presidential Task Force
| | - Fiona M. Blyth
- Sydney School of Public Health, Faculty of Medicine and Health, University of Sydney, Camperdown, NSW 2006, Australia
| | - Louisa Degenhardt
- National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Marta Di Forti
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE5 8AF, UK. National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King’s College London, UK. South London and Maudsley NHS Mental Health Foundation Trust, London, UK
| | - Christopher Eccleston
- Centre for Pain Research. The University of Bath, Bath, UK, & Department of Clinical and Health Psychology, The University of Ghent, Belgium
| | - David P. Finn
- Pharmacology and Therapeutics, School of Medicine, Galway Neuroscience Centre and Centre for Pain Research, Human Biology Building, National University of Ireland Galway, University Road, Galway, Ireland
| | - Nanna B Finnerup
- Danish Pain Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Emma Fisher
- Centre for Pain Research. The University of Bath, Bath, UK
| | - Alexandra E. Fogarty
- Department of Neurology, Division of Physical Medicine & Rehabilitation, Washington University School of Medicine. St Louis, MO, USA
| | - Ian Gilron
- Departments of Anesthesiology & Perioperative Medicine and Biomedical & Molecular Sciences, Kingston Health Sciences Centre and Queen’s University; Centre for Neuroscience Studies, Queen’s University; School of Policy Studies, Queen’s University, Kingston, Canada
| | - Andrea G. Hohmann
- Department of Psychological and Brain Sciences, Program in Neuroscience, Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, USA
| | - Eija Kalso
- Department of Pharmacology and SleepWell Research Programme, University of Helsinki; Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital
| | - Elliot Krane
- Departments of Anesthesiology, Perioperative, and Pain Medicine, & Pediatrics, Stanford University School of Medicine, Stanford, California, USA
| | - Mohammed Mohiuddin
- Department of Anesthesiology & Perioperative Medicine and, Queen’s University, Kingston, Canada
| | | | - Michael Rowbotham
- Department of Anesthesia, University of California, San Francisco, California, USA
| | - Nadia Soliman
- Pain Research, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, UK
| | - Mark Wallace
- Division of Pain Medicine, Department of Anesthesiology, University of California San Diego
| | | | - Andrew SC Rice
- Pain Research, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, UK
| |
Collapse
|