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Coppi S, Jensen KB, Ehrsson HH. Eliciting the rubber hand illusion by the activation of nociceptive C and Aδ fibers. Pain 2024; 165:2240-2256. [PMID: 38787634 PMCID: PMC11404332 DOI: 10.1097/j.pain.0000000000003245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/12/2024] [Indexed: 05/26/2024]
Abstract
ABSTRACT The coherent perceptual experience of one's own body depends on the processing and integration of signals from multiple sensory modalities, including vision, touch, and proprioception. Although nociception provides critical information about damage to the tissues of one's body, little is known about how nociception contributes to own-body perception. A classic experimental approach to investigate the perceptual and neural mechanisms involved in the multisensory experience of one's own body is the rubber hand illusion (RHI). During the RHI, people experience a rubber hand as part of their own body (sense of body ownership) caused by synchronized stroking of the rubber hand in the participant's view and the hidden participant's real hand. We examined whether the RHI can be elicited by visual and "pure" nociceptive stimulation, ie, without tactile costimulation, and if so, whether it follows the basic perceptual rules of the illusion. In 6 separate experiments involving a total of 180 healthy participants, we used a Nd:YAP laser stimulator to specifically target C and Aδ fibers in the skin and compared the illusion condition (congruent visuonociceptive stimulation) to control conditions of incongruent visuonociceptive, incongruent visuoproprioceptive, and no nociceptive stimulation. The illusion was quantified through direct (questionnaire) and indirect (proprioceptive drift) behavioral measures. We found that a nociceptive rubber hand illusion (N-RHI) could be elicited and that depended on the spatiotemporal congruence of visuonociceptive signals, consistent with basic principles of multisensory integration. Our results suggest that nociceptive information shapes multisensory bodily awareness and contributes to the sense of body ownership.
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Affiliation(s)
| | - Karin B Jensen
- Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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2
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Rhee A, Granville Smith I, Compte R, Vehof J, Nessa A, Wadge S, Freidin MB, Bennett DL, Williams FMK. Quantitative sensory testing and chronic pain syndromes: a cross-sectional study from TwinsUK. BMJ Open 2024; 14:e085814. [PMID: 39231552 PMCID: PMC11407192 DOI: 10.1136/bmjopen-2024-085814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/06/2024] Open
Abstract
OBJECTIVE The chronic pain syndromes (CPS) include syndromes such as chronic widespread pain (CWP), dry eye disease (DED) and irritable bowel syndrome (IBS). Highly prevalent and lacking pathognomonic biomarkers, the CPS are known to cluster in individuals in part due to their genetic overlap, but patient diagnosis can be difficult. The success of quantitative sensory testing (QST) and inflammatory biomarkers as phenotyping tools in conditions such as painful neuropathies warrant their investigation in CPS. We aimed to examine whether individual QST modalities and candidate inflammatory markers were associated with CWP, DED or IBS in a large, highly phenotyped population sample. DESIGN Cross-sectional study. SETTING Community-dwelling cohort. PARTICIPANTS Twins from the TwinsUK cohort PRIMARY AND SECONDARY OUTCOME MEASURES: We compared 10 QST modalities, measured in participants with and without a CWP diagnosis between 2007 and 2012. We investigated whether inflammatory markers measured by Olink were associated with CWP, including interleukin-6 (IL-6), IL-8, IL-10, monocyte chemoattractant protein-1 and tumour necrosis factor. All analyses were repeated in DED and IBS with correction for multiple testing. RESULTS In N=3022 twins (95.8% women), no association was identified between individual QST modalities and CPS diagnoses (CWP, DED and IBS). Analyses of candidate inflammatory marker levels and CPS diagnoses in n=1368 twins also failed to meet statistical significance. CONCLUSION Our findings in a large population cohort suggest a lack of true association between singular QST modalities or candidate inflammatory markers and CPS.
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Affiliation(s)
- Amber Rhee
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | | | - Roger Compte
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Jelle Vehof
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
- Departments of Ophthalmology and Epidemiology, University of Groningen, Groningen, The Netherlands
- Department of Ophthalmology, Vestfold Hospital Trust, Tønsberg, Norway
| | - Ayrun Nessa
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Samuel Wadge
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Maxim B Freidin
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
- Department of Biology, Queen Mary University of London, London, UK
| | - David L Bennett
- Nuffield Department of Clinical Neurosciences, Oxford University, Oxford, UK
| | - Frances M K Williams
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
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3
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Telesca A, Soldini E, Devigili G, Cazzato D, Dalla Bella E, Grazzi L, Usai S, Lauria G, Consonni M. Cognitive, behavioral, and psychological phenotypes in small fiber neuropathy: A case-control study. Cortex 2024; 173:208-221. [PMID: 38422856 DOI: 10.1016/j.cortex.2024.01.012] [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: 08/01/2023] [Revised: 11/16/2023] [Accepted: 01/10/2024] [Indexed: 03/02/2024]
Abstract
OBJECTIVE Small fiber neuropathy (SFN) is a well-defined chronic painful condition causing severe individual and societal burden. While mood disorders have been described, cognitive and behavioral profiles of SFN patients has not been investigated. METHODS Thirty-four painful SFN patients underwent comprehensive cognitive, behavioral, psychological, quality of life (QoL), and personality assessment using validated questionnaires. As control samples, we enrolled 36 patients with painful peripheral neuropathy (PPN) of mixed etiology and 30 healthy controls (HC). Clinical measures of neuropathic pain, duration, frequency, and intensity of pain at the time of assessment were recorded. Between-group and correlation analyses were performed and corrected for multiple comparisons. RESULTS No differences in clinical measures were found between SFN and PPN, and all groups had similar cognitive profiles. SFN patients showed higher levels of anxiety and alexithymia (p < .005) compared to PPN and HC, considering also pain intensity. Maladaptive coping strategies characterized both patient groups, but only SFN revealed higher levels of acceptance of pain (p < .05). Pain intensity and neuropathic symptoms were associated with mood, low QoL and catastrophism (p < .001), particularly, the higher the perceived pain intensity, the higher the use of maladaptive coping strategies (p < .001). The personality assessment revealed significant feelings of worthlessness and somatization traits both in SFN and PPN (p < .002 vs HC). DISCUSSIONS our results suggest that SFN patients had a normal-like cognitive profile, while their behavioral profile is characterized by mood disorders, alexithymia, maladaptive coping strategies, and poor QoL, as other chronic pain conditions, possibly related to pain intensity. Personality assessment suggests that somatization and feelings of worthlessness, which may worsen the neuropsychological profile, deserve clinical attention when considering patients' therapeutic approaches. At the same time, the high level of acceptance of pain is promising for therapeutic approaches based on psychological support.
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Affiliation(s)
- A Telesca
- Ph.D. Program in Neuroscience, School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - E Soldini
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - G Devigili
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico "Carlo Besta", Milan, Italy
| | - D Cazzato
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Neurophysiology Unit, Fondazione IRCCS Istituto Neurologico "Carlo Besta", Milan, Italy
| | - E Dalla Bella
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - L Grazzi
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - S Usai
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - G Lauria
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy.
| | - M Consonni
- Neuroalgology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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Trübenbacher L, Lindenberg N, Graf BM, Backmund M, Unglaub W, Lassen CL. Nociceptive Flexion Reflex Threshold is No Suitable Marker for Diagnosing Opioid-Induced Hyperalgesia. J Pain Res 2024; 17:1067-1076. [PMID: 38505502 PMCID: PMC10948325 DOI: 10.2147/jpr.s421841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/30/2024] [Indexed: 03/21/2024] Open
Abstract
Background Opioid induced hyperalgesia (OIH) describes a state of altered pain sensation due to opioid exposure. It often occurs among persons with opioid use disorder receiving substitution therapy. Methods The purpose of this study was to find out, whether OIH diagnosis could be facilitated by an objective pain indicating marker: the Nociceptive Flexion Reflex (NFR). Forty persons with opioid use disorder, 20 of them maintained on methadone and 20 treated with buprenorphine, as well as a control group of 20 opioid-free subjects, were examined. It was aimed to find out whether and in which way these opioid agonists alter reflex threshold (NFR-T). A cold-pressor test was performed to investigate the prevalence of OIH. Furthermore, electrical stimulation and electromyography analyzation were used for NFR-T measurement. Subjective pain ratings were evaluated with a numeric rating scale. Results Significantly increased sensitivity to cold pressor pain was found in both maintenance groups when compared to their opioid-free counterparts (p < 0.001). Neither methadone nor buprenorphine showed any effect on NFR-T. This might be explained by the reflex approaching at the wrong location in the central nervous system. Consequently, NFR-T is not a suitable marker for diagnosing OIH. Conclusion Although methadone and buprenorphine have been proven to cause OIH, no effect on NFR-T was observed. A statistically significant effect could have been observed with a larger number of participants. Further research, with special focus on patients' adjuvant medication, should be conducted in the future, to facilitate diagnosis of OIH and provide appropriate pain management for maintenance patients.
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Affiliation(s)
- Luisa Trübenbacher
- Centre for Interdisciplinary Pain Medicine, Department of Anaesthesiology, University Hospital of Regensburg, Regensburg, 93053, Germany
| | - Nicole Lindenberg
- Centre for Interdisciplinary Pain Medicine, Department of Anaesthesiology, University Hospital of Regensburg, Regensburg, 93053, Germany
| | - Bernhard M Graf
- Centre for Interdisciplinary Pain Medicine, Department of Anaesthesiology, University Hospital of Regensburg, Regensburg, 93053, Germany
| | - Markus Backmund
- “Praxiszentrum im Tal”, Tal 9, 80331, Ludwig-Maximilians-University, Munich, Germany
| | - Wilhelm Unglaub
- “medbo” District Hospital, Universitätsstraße 84, 93053, University of Regensburg, Regensburg, Germany
| | - Christoph L Lassen
- Centre for Interdisciplinary Pain Medicine, Department of Anaesthesiology, University Hospital of Regensburg, Regensburg, 93053, Germany
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Moncho D, Poca MA, Rahnama K, Sánchez Roldán MÁ, Santa-Cruz D, Sahuquillo J. The Role of Neurophysiology in Managing Patients with Chiari Malformations. J Clin Med 2023; 12:6472. [PMID: 37892608 PMCID: PMC10607909 DOI: 10.3390/jcm12206472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/25/2023] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
Chiari malformation type 1 (CM1) includes various congenital anomalies that share ectopia of the cerebellar tonsils lower than the foramen magnum, in some cases associated with syringomyelia or hydrocephalus. CM1 can cause dysfunction of the brainstem, spinal cord, and cranial nerves. This functional alteration of the nervous system can be detected by various modalities of neurophysiological tests, such as brainstem auditory evoked potentials, somatosensory evoked potentials, motor evoked potentials, electromyography and nerve conduction studies of the cranial nerves and spinal roots, as well as brainstem reflexes. The main goal of this study is to review the findings of multimodal neurophysiological examinations in published studies of patients with CM1 and their indication in the diagnosis, treatment, and follow-up of these patients, as well as their utility in intraoperative monitoring.
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Affiliation(s)
- Dulce Moncho
- Department of Clinical Neurophysiology, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (K.R.); (M.Á.S.R.); (D.S.-C.)
- Neurotraumatology and Neurosurgery Research Unit, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain;
| | - Maria A. Poca
- Neurotraumatology and Neurosurgery Research Unit, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain;
- Department of Neurosurgery, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
- Department of Surgery, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain
| | - Kimia Rahnama
- Department of Clinical Neurophysiology, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (K.R.); (M.Á.S.R.); (D.S.-C.)
| | - M. Ángeles Sánchez Roldán
- Department of Clinical Neurophysiology, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (K.R.); (M.Á.S.R.); (D.S.-C.)
| | - Daniela Santa-Cruz
- Department of Clinical Neurophysiology, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (K.R.); (M.Á.S.R.); (D.S.-C.)
| | - Juan Sahuquillo
- Neurotraumatology and Neurosurgery Research Unit, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain;
- Department of Neurosurgery, Vall d’Hebron University Hospital, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain
- Department of Surgery, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain
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Katirci Kirmaci Zİ, Adigüzel H, Göğremiş M, Kirmaci YŞ, İnanç Y, Tuncel Berktaş D. The effect of Transcutaneous Electrical Nerve Stimulation (TENS) and Interferential Currents (IFC) on pain, functional capacity, and quality of life in patients with multiple sclerosis: A randomized controlled, single-blinded study. Mult Scler Relat Disord 2023; 71:104541. [PMID: 36738692 DOI: 10.1016/j.msard.2023.104541] [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: 11/29/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 01/30/2023]
Abstract
OBJECTIVE The aim is to compare the effects of different electrical stimulations on pain, functional capacity and quality of life in patients with Multiple Sclerosis (pwMS). METHOD 40 pwMS were included in the study, randomized by simple random method and divided into 2 groups. Low-frequency Transkutaneal Electric Stimulation (TENS) was applied to 1st group and Interferential current was applied to 2nd group for 30 min 5 days/a week for 4 weeks. For pain severity Visual Analogue Scale (VAS), for neuropathic pain the LANSS questionnaire was used. Functional capacity was evaluated with the 2-minute walk test (2MWT) and quality of life was evaluated with the 'Multiple Sclerosis International Quality of Life Scale (MusiQol)'. RESULTS The most severe and mean VAS and LANSS results significiantly decreased, 2MWT results significiantly increased in two groups (p<0.05). A significiant increase was found in all sub-headings of the MusiQol, except for the relationship with the health system in TENS group (p<0.05). An increase was found in the total score, activities of daily living, well-being, relationship with friends, relationship with family, sexual life, rejection sub-headings of the MusiQol in IFC group (p<0.05). There was no significant difference between the groups in terms of VAS, LANSS, 2MWT and MusiQol (p>0.05). CONCLUSION In this study, it was found that interference current and TENS applications decrease pain and increase functional capacity. However, it was determined that TENS application was a more effective method in increasing the quality of life. CLINICALTRIALS NCT05110586.
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Affiliation(s)
- Zekiye İpek Katirci Kirmaci
- Kahramanmaraş Sutçu Imam University, Faculty of Health Science, Department of Physiotherapy and Rehabilitation, Kahramanmaras, Turkey.
| | - Hatice Adigüzel
- Kahramanmaraş Sutçu Imam University, Faculty of Health Science, Department of Physiotherapy and Rehabilitation, Kahramanmaras, Turkey
| | - Mehmet Göğremiş
- Kahramanmaraş Sutçu Imam University, Faculty of Health Science, Department of Physiotherapy and Rehabilitation, Kahramanmaras, Turkey
| | - Yusuf Şinasi Kirmaci
- Kahramanmaraş Sutçu Imam University, Faculty of Health Science, Department of Physiotherapy and Rehabilitation, Kahramanmaras, Turkey
| | - Yılmaz İnanç
- Kahramanmaras Sutcu Imam University, Faculty of Medicine, Kahramanmaras, Turkey
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Powell-Roach KL, Yao Y, Cao X, Chamala S, Wallace MR, Cruz-Almeida Y, Molokie RE, Wang ZJ, Wilkie DJ. Analysis of AVPR1A, thermal and pressure pain thresholds, and stress in sickle cell disease. FRONTIERS IN PAIN RESEARCH 2023; 3:1060245. [PMID: 36688082 PMCID: PMC9845903 DOI: 10.3389/fpain.2022.1060245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/06/2022] [Indexed: 01/05/2023] Open
Abstract
Aim In patients with sickle cell disease (SCD), negative physical and emotional experiences result from intense chronic and acute pain episodes, but factors underlying these, and their interactions, are not well understood. The arginine vasopressin receptor 1a gene (AVPR1A) single nucleotide polymorphism rs10877969 has been previously associated with aspects of acute pain and stress related pain. In this study, we tested for associations between this SNP, thermal and pressure pain thresholds, clinical pain, and stress in people with SCD. Methods 150 adults enrolled with SCD completed pain intensity measures (Average Pain Intensity, API) and the Perceived Stress Questionnaire (PSQ). Thermal and pressure pain threshold data were available from quantitative sensory testing (QST), and rs10877969 genotypes were obtained. Results In models adjusted for age and gender, between rs10877969 genotypes, we observed no significant differences in thermal (cold, p = 0.66; heat, p = 0.91) and mechanical (pressure, p = 0.33) pain thresholds. The association of rs10877969 with API (p = 0.09) was borderline, but non-significant with PSQ (p = 0.51). The correlation between clinical pain and environmental stress was significant, r = 0.18, p = 0.024, however, the interaction of genotype and PSQ was not significant (p = 0.63). Conclusion Clinical and experimental pain were not significantly associated with the rs10877969 genotype. The rs10877969 genotype did not moderate the correlation between environmental stress and clinical pain in this population. However, a trend toward a protective T allele effect on average pain rating in SCD warrants future exploration of this SNP/gene in SCD.
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Affiliation(s)
- Keesha L. Powell-Roach
- Department of Community and Population Health, University of Tennessee Health Science Center, College of Nursing, Memphis, TN, United States
- Department of Biobehavioral Nursing Science, University of Florida, College of Nursing, Gainesville, FL, United States
| | - Yingwei Yao
- Department of Biobehavioral Nursing Science, University of Florida, College of Nursing, Gainesville, FL, United States
| | - Xueyuan Cao
- Department of Community and Population Health, University of Tennessee Health Science Center, College of Nursing, Memphis, TN, United States
| | - Srikar Chamala
- Department of Pathology and Laboratory Medicine, Childrens Hospital of Los Angeles, Los Angeles, CA, United States
| | - Margaret R. Wallace
- Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, FL, United States
- University of Florida Genetics Institute, Gainesville, FL, United States
| | - Yenisel Cruz-Almeida
- College of Dentistry, University of Florida, Gainesville, FL, United States
- Pain Research and Intervention Center of Excellence (PRICE), University of Florida, Gainesville, FL, United States
| | - Robert E. Molokie
- Department of Medicine, University of Illinois at Chicago, College of Medicine, Chicago, IL, United States
- Department of Pharmaceutical Sciences, Neurology and Bioengineering, University of Illinois College of Pharmacy, Chicago, IL, United States
- Medical Service, Jesse Brown VA Medical Center, Chicago, IL, United States
| | - Zaijie Jim Wang
- Department of Pharmaceutical Sciences, Neurology and Bioengineering, University of Illinois College of Pharmacy, Chicago, IL, United States
| | - Diana J. Wilkie
- Department of Biobehavioral Nursing Science, University of Florida, College of Nursing, Gainesville, FL, United States
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Sachau J, Sendel M, Péchard M, Schnabel K, Schmieg I, Medkour T, Ecochard L, Woischnik M, Liedgens H, Pogatzki-Zahn E, Baron R, Bouhassira D. Patient Reported Outcome Measures in Chronic Neuropathic Pain Clinical Trials - A Systematic Literature Review. THE JOURNAL OF PAIN 2023; 24:38-54. [PMID: 36216128 DOI: 10.1016/j.jpain.2022.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/22/2022] [Accepted: 09/01/2022] [Indexed: 11/05/2022]
Abstract
In neuropathic pain clinical trials, the patient's perspective is often insufficiently reflected focusing mainly on pain intensity. Comparability of outcome assessment is limited due to heterogenous patient reported outcome measures (PROMs). The MEDLINE, CENTRAL, and Embase databases and reference lists of published meta-analyses were searched. Randomized controlled studies assessing treatment efficacy of drugs for chronic neuropathic pain were included. PROMs were assigned to recommended IMMPACT/NeuPSIG domains: pain intensity, pain other aspects, physical functioning, emotional functioning, global improvement and satisfaction, adverse events, participant disposition. Domains and PROMs were compared regarding the publication year and methodological quality of the studies. Within the 251 included studies 200 PROMs were used with 27 being recommended by IMMPACT/NeuPSIG. The number of domains was higher in high/moderate quality studies. The (sub-) domains 'physical functioning', 'global improvement and satisfaction', and 'neuropathic pain quality' were assessed more frequently in high/moderate quality studies and those published after 2011. Recent studies and those of better quality more often used the recommended PROMs. Although neuropathic assessment via PROMs has improved, there is still a high heterogeneity. A standardized core set of outcome domains and should be defined to improve neuropathic pain treatment and to achieve better comparability of clinical trials. Perspective: This systematic literature review assesses the use of patient reported outcome measures (PROMs) in chronic neuropathic pain. The results show that there is still a high heterogeneity, highlighting the need for a standardized core set of outcome domains and PROMs to improve comparability of clinical trials and neuropathic pain treatment.
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Affiliation(s)
- Juliane Sachau
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany.
| | - Manon Sendel
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Marie Péchard
- Inserm U987, APHP, UVSQ, Paris-Saclay University, CHU Ambroise Paré, Boulogne-Billancourt, France
| | - Kathrin Schnabel
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital of Muenster, Münster
| | - Iris Schmieg
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital of Muenster, Münster
| | - Terkia Medkour
- Inserm U987, APHP, UVSQ, Paris-Saclay University, CHU Ambroise Paré, Boulogne-Billancourt, France
| | | | | | | | - Esther Pogatzki-Zahn
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital of Muenster, Münster
| | - Ralf Baron
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Didier Bouhassira
- Inserm U987, APHP, UVSQ, Paris-Saclay University, CHU Ambroise Paré, Boulogne-Billancourt, France
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Somatosensory and Gustatory Profiling in the Orofacial Region. Diagnostics (Basel) 2022; 12:diagnostics12123198. [PMID: 36553205 PMCID: PMC9777464 DOI: 10.3390/diagnostics12123198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Quantitative sensory testing (QST) is a standard procedure in medicine to describe sensory patterns in various pathologies. The aim of this prospective clinical study was to define reference values of the trigeminal nerve (V3), including taste qualities, to create a compatibility for sensory loss or gain in pathologies. Fifty-one patients were included, and a standardized testing battery with 11 QST parameters according to the German Research Network on Neuropathic Pain (DFNS) was applied complemented by quantitative gustatory assessments. Significant somatosensory differences were found between the test sites (MDT at the chin, WDT at the lower lip) but no effect was detected for gender, age, and between body types. Taste sensitivity was dependent on concentration, gender (females being more sensitive) and increasing age (for bitter and sour taste). We provide reference values for somatosensory and gustatory testing of the facial area. Our data facilitate the detection of neurosensory abnormalities in the orofacial region. This might also serve as a control setting for COVID-19.
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10
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Correia RM, Nakano LCU, Vasconcelos V, Flumignan RLG. Prevention of infection in peripheral arterial reconstruction of the lower limb. Hippokratia 2022. [DOI: 10.1002/14651858.cd015022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rebeca M Correia
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
| | - Luis CU Nakano
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
| | - Vladimir Vasconcelos
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
| | - Ronald LG Flumignan
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
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11
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Cristino MAB, Nakano LCU, Vasconcelos V, Correia RM, Flumignan RLG. Prevention of infection in aortic or aortoiliac peripheral arterial reconstruction. Hippokratia 2022. [DOI: 10.1002/14651858.cd015192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mateus AB Cristino
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
| | - Luis CU Nakano
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
| | - Vladimir Vasconcelos
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
| | - Rebeca M Correia
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
| | - Ronald LG Flumignan
- Department of Surgery, Division of Vascular and Endovascular Surgery; Universidade Federal de São Paulo; São Paulo Brazil
- Cochrane Brazil; Universidade Federal de São Paulo; São Paulo Brazil
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12
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Shinu P, Morsy MA, Nair AB, Mouslem AKA, Venugopala KN, Goyal M, Bansal M, Jacob S, Deb PK. Novel Therapies for the Treatment of Neuropathic Pain: Potential and Pitfalls. J Clin Med 2022; 11:3002. [PMID: 35683390 PMCID: PMC9181614 DOI: 10.3390/jcm11113002] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/20/2022] [Accepted: 05/24/2022] [Indexed: 12/15/2022] Open
Abstract
Neuropathic pain affects more than one million people across the globe. The quality of life of people suffering from neuropathic pain has been considerably declining due to the unavailability of appropriate therapeutics. Currently, available treatment options can only treat patients symptomatically, but they are associated with severe adverse side effects and the development of tolerance over prolonged use. In the past decade, researchers were able to gain a better understanding of the mechanisms involved in neuropathic pain; thus, continuous efforts are evident, aiming to develop novel interventions with better efficacy instead of symptomatic treatment. The current review discusses the latest interventional strategies used in the treatment and management of neuropathic pain. This review also provides insights into the present scenario of pain research, particularly various interventional techniques such as spinal cord stimulation, steroid injection, neural blockade, transcranial/epidural stimulation, deep brain stimulation, percutaneous electrical nerve stimulation, neuroablative procedures, opto/chemogenetics, gene therapy, etc. In a nutshell, most of the above techniques are at preclinical stage and facing difficulty in translation to clinical studies due to the non-availability of appropriate methodologies. Therefore, continuing research on these interventional strategies may help in the development of promising novel therapies that can improve the quality of life of patients suffering from neuropathic pain.
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Affiliation(s)
- Pottathil Shinu
- Department of Biomedical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mohamed A. Morsy
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (M.A.M.); (A.B.N.); (A.K.A.M.); (K.N.V.)
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61511, Egypt
| | - Anroop B. Nair
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (M.A.M.); (A.B.N.); (A.K.A.M.); (K.N.V.)
| | - Abdulaziz K. Al Mouslem
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (M.A.M.); (A.B.N.); (A.K.A.M.); (K.N.V.)
| | - Katharigatta N. Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (M.A.M.); (A.B.N.); (A.K.A.M.); (K.N.V.)
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, Durban 4000, South Africa
| | - Manoj Goyal
- Department of Anesthesia Technology, College of Applied Medical Sciences in Jubail, Imam Abdul Rahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Monika Bansal
- Department of Neuroscience Technology, College of Applied Medical Sciences in Jubail, Imam Abdul Rahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Shery Jacob
- Department of Pharmaceutical Sciences, College of Pharmacy, Gulf Medical University, Ajman 4184, United Arab Emirates;
| | - Pran Kishore Deb
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Philadelphia University, Amman 19392, Jordan;
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13
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Forte G, Troisi G, Pazzaglia M, Pascalis VD, Casagrande M. Heart Rate Variability and Pain: A Systematic Review. Brain Sci 2022; 12:brainsci12020153. [PMID: 35203917 PMCID: PMC8870705 DOI: 10.3390/brainsci12020153] [Citation(s) in RCA: 64] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Background and Objective: Heart rate variability (HRV) as an index of the autonomic nervous system appears to be related to reactivity to experimental pain stimuli. HRV could better explain the contributions of sympathetic and parasympathetic activity response to nociceptive stimulation. The aim of this study was to systematically review and synthesize the current evidence on HRV in relation to the experience of pain in experimental tasks. Databases and Data Treatment: Studies indexed in the PubMed, PsycINFO, MEDLINE, WebOfScience, and Scopus databases were reviewed for eligibility. Studies on the autonomic response (i.e., HRV) to experimentally induced pain in healthy adults were included. Different methods of pain induction were considered (e.g., thermal, pressure, and electrical). Data were synthesized considering the association between HRV and both pain induction and subjective measures of pain. Results: Seventy-one studies were included. The results underline significant change in both the sympathetic and parasympathetic autonomic nervous systems during the painful stimulation independent of the pain induction method. The autonomic reaction to pain could be affected by several factors, such as sex, age, body mass index, breathing patterns, the intensity of the stimulation, and the affective state. Moreover, an association between the autonomic nervous system and the subjective experience of pain was found. Higher parasympathetic activity was associated with better self-regulation capacities and, accordingly, a higher pain inhibition capacity. Conclusions: HRV appears to be a helpful marker to evaluate nociceptive response in experimentally induced pain. Future studies are also needed in clinical samples to understand better the interindividual changes of autonomic response due to pain stimuli.
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Affiliation(s)
- Giuseppe Forte
- Department of Psychology, “Sapienza” University of Rome, 00185 Rome, Italy; (M.P.); (V.D.P.)
- Body and Action Lab, IRCCS Fondazione Santa Lucia, Via Ardeatina 306, 00179 Rome, Italy
- Correspondence: (G.F.); (M.C.)
| | - Giovanna Troisi
- Department of Clinical and Dynamic Psychology and Health Studies, “Sapienza” University of Rome, 00185 Rome, Italy;
| | - Mariella Pazzaglia
- Department of Psychology, “Sapienza” University of Rome, 00185 Rome, Italy; (M.P.); (V.D.P.)
- Body and Action Lab, IRCCS Fondazione Santa Lucia, Via Ardeatina 306, 00179 Rome, Italy
| | - Vilfredo De Pascalis
- Department of Psychology, “Sapienza” University of Rome, 00185 Rome, Italy; (M.P.); (V.D.P.)
| | - Maria Casagrande
- Department of Clinical and Dynamic Psychology and Health Studies, “Sapienza” University of Rome, 00185 Rome, Italy;
- Correspondence: (G.F.); (M.C.)
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14
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Fabig SC, Kersebaum D, Lassen J, Sendel M, Jendral S, Muntean A, Baron R, Hüllemann P. A modality-specific somatosensory evoked potential test protocol for clinical evaluation: A feasibility study. Clin Neurophysiol 2021; 132:3104-3115. [PMID: 34740042 DOI: 10.1016/j.clinph.2021.08.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/26/2021] [Accepted: 08/29/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE We aimed to establish an objective neurophysiological test protocol that can be used to assess the somatosensory nervous system. METHODS In order to assess most fiber subtypes of the somatosensory nervous system, repetitive stimuli of seven different modalities (touch, vibration, pinprick, cold, contact heat, laser, and warmth) were synchronized with the electroencephalogram (EEG) and applied on the cheek and dorsum of the hand and dorsum of the foot in 21 healthy subjects and three polyneuropathy (PNP) patients. Latencies and amplitudes of the modalities were assessed and compared. Patients received quantitative sensory testing (QST) as reference. RESULTS We found reproducible evoked potentials recordings for touch, vibration, pinprick, contact-heat, and laser stimuli. The recording of warm-evoked potentials was challenging in young healthy subjects and not applicable in patients. Latencies were shortest within Aβ-fiber-mediated signals and longest within C-fibers. The test protocol detected function loss within the Aβ-fiber and Aδ-fiber-range in PNP patients. This function loss corresponded with QST findings. CONCLUSION In this pilot study, we developed a neurophysiological test protocol that can specifically assess most of the somatosensory modalities. Despite technical challenges, initial patient data appear promising regarding a possible future clinical application. SIGNIFICANCE Established and custom-made stimulators were combined to assess different fiber subtypes of the somatosensory nervous system using modality-specific evoked potentials.
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Affiliation(s)
- Sophie-Charlotte Fabig
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany.
| | - Dilara Kersebaum
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Josephine Lassen
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Manon Sendel
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Swantje Jendral
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Alexandra Muntean
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Ralf Baron
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
| | - Philipp Hüllemann
- Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Arnold-Heller-Straße 3, Haus D, 24105 Kiel, Germany
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15
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Guidetti M, Ferrucci R, Vergari M, Aglieco G, Naci A, Versace S, Pacheco-Barrios K, Giannoni-Luza S, Barbieri S, Priori A, Bocci T. Effects of Transcutaneous Spinal Direct Current Stimulation (tsDCS) in Patients With Chronic Pain: A Clinical and Neurophysiological Study. Front Neurol 2021; 12:695910. [PMID: 34552550 PMCID: PMC8450534 DOI: 10.3389/fneur.2021.695910] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/30/2021] [Indexed: 12/27/2022] Open
Abstract
Background and Aims: Chronic pain is a complex clinical condition, often devastating for patients and unmanageable with pharmacological treatments. Converging evidence suggests that transcutaneous spinal Direct Current Stimulation (tsDCS) might represent a complementary therapy in managing chronic pain. In this randomized, double-blind and sham-controlled crossover study, we assessed tsDCS effects in chronic pain patients. Methods: Sixteen patients (aged 65.06 ± 16.16 years, eight women) with chronic pain of different etiology underwent sham and anodal tsDCS (anode over the tenth thoracic vertebra, cathode over the somatosensory cortical area: 2.5 mA, 20 min, 5 days for 1 week). As outcomes, we considered the Visual Analog Scale (VAS), the Neuropathic Pain Symptom Inventory (NPSI), and the components of the lower limb flexion reflex (LLFR), i.e., RIII threshold, RII latency and area, RIII latency and area, and flexion reflex (FR) total area. Assessments were conducted before (T0), immediately at the end of the treatment (T1), after 1 week (T2) and 1 month (T3). Results: Compared to sham, anodal tsDCS reduced RIII area at T2 (p = 0.0043) and T3 (p = 0.0012); similarly, FR total area was reduced at T3 (p = 0.03). Clinically, anodal tsDCS dampened VAS at T3 (p = 0.015), and NPSI scores at T1 (p = 0.0012), and T3 (p = 0.0015), whereas sham condition left them unchanged. Changes in VAS and NPSI scores linearly correlated with the reduction in LLFR areas (p = 0.0004). Conclusions: Our findings suggest that tsDCS could modulate nociceptive processing and pain perception in chronic pain syndromes.
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Affiliation(s)
- Matteo Guidetti
- "Aldo Ravelli" Center for Neurotechnology and Experimental Brain Therapeutics, Department of Health Sciences, University of Milan, Milan, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Roberta Ferrucci
- "Aldo Ravelli" Center for Neurotechnology and Experimental Brain Therapeutics, Department of Health Sciences, University of Milan, Milan, Italy.,Azienda Socio-Sanitaria Territoriale-Santi Paolo e Carlo University Hospital, Milan, Italy
| | - Maurizio Vergari
- Neurophysiology Unit, Foundation Istituto di Ricerca e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giada Aglieco
- Neurophysiology Unit, Foundation Istituto di Ricerca e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Anisa Naci
- Neurophysiology Unit, Foundation Istituto di Ricerca e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Sara Versace
- Neurophysiology Unit, Foundation Istituto di Ricerca e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Kevin Pacheco-Barrios
- Neuromodulation Center, Spaulding Rehabilitation Hospital, Boston, MA, United States.,Center for Clinical Research Learning, Massachusetts General Hospital, Boston, MA, United States.,Unidad de Investigación para la Generación y Síntesis de Evidencias en Salud, Universidad San Ignacio de Loyola, Lima, Peru
| | - Stefano Giannoni-Luza
- Neuromodulation Center, Spaulding Rehabilitation Hospital, Boston, MA, United States.,Center for Clinical Research Learning, Massachusetts General Hospital, Boston, MA, United States
| | - Sergio Barbieri
- Neurophysiology Unit, Foundation Istituto di Ricerca e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alberto Priori
- "Aldo Ravelli" Center for Neurotechnology and Experimental Brain Therapeutics, Department of Health Sciences, University of Milan, Milan, Italy.,Azienda Socio-Sanitaria Territoriale-Santi Paolo e Carlo University Hospital, Milan, Italy
| | - Tommaso Bocci
- "Aldo Ravelli" Center for Neurotechnology and Experimental Brain Therapeutics, Department of Health Sciences, University of Milan, Milan, Italy.,Azienda Socio-Sanitaria Territoriale-Santi Paolo e Carlo University Hospital, Milan, Italy
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16
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Leandri M, Di Stefano G, Truini A, Marinelli L. Early nociceptive evoked potentials (NEPs) recorded from the scalp. Clin Neurophysiol 2021; 132:2896-2906. [PMID: 34226125 DOI: 10.1016/j.clinph.2021.05.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 05/07/2021] [Accepted: 05/24/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Neurophysiological investigation of nociceptive pathway has so far been limited to late cortical responses. We sought to detect early components of the cortical evoked potentials possibly reflecting primary sensory activity. METHODS The 150 IDE micropatterned electrode was used to selectively activate Aδ intraepidermic fibres of the right hand dorsum in 25 healthy subjects and 3 patients suffering from trigeminal neuralgia. Neurographic recordings were performed to assess type of stimulated fibres and check selectivity. Cortical evoked potentials were recorded from C3'-Fz and Cz-Au1. RESULTS Neurographic recordings confirmed selective activation of Aδ fibres. Early components were detected after repetitive stimulation (0.83/s rate and 250-500 averages); the first negative component occured at 40 ms (N40) on the contralateral scalp. CONCLUSIONS The provided data support the hypothesis that N40 could be the cortical primary response conducted by fast Aδ fibres. SIGNIFICANCE This is the first report of early, possibly primary, cortical responses in humans by nociceptive peripheral stimulation. Although not perfected yet to allow widespread diagnostic use, this is probably the only method to allow fully objective evaluation of the nociceptive system, with important future implications in experimental and clinical neurophysiology.
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Affiliation(s)
- Massimo Leandri
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genova, L.go Daneo 3, 16132 Genova, Italy.
| | - Giulia Di Stefano
- Department of Human Neuroscience, Sapienza University, Viale dell'Università 30, 00185 Roma, Italy.
| | - Andrea Truini
- Department of Human Neuroscience, Sapienza University, Viale dell'Università 30, 00185 Roma, Italy.
| | - Lucio Marinelli
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genova, L.go Daneo 3, 16132 Genova, Italy; Department of Neuroscience, Ospedale Policlinico San Martino, L.go R. Benzi 10, 16132 Genova, Italy.
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17
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Early Detection of Diabetic Peripheral Neuropathy: A Focus on Small Nerve Fibres. Diagnostics (Basel) 2021; 11:diagnostics11020165. [PMID: 33498918 PMCID: PMC7911433 DOI: 10.3390/diagnostics11020165] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/14/2021] [Accepted: 01/20/2021] [Indexed: 02/07/2023] Open
Abstract
Diabetic peripheral neuropathy (DPN) is the most common complication of both type 1 and 2 diabetes. As a result, neuropathic pain, diabetic foot ulcers and lower-limb amputations impact drastically on quality of life, contributing to the individual, societal, financial and healthcare burden of diabetes. DPN is diagnosed at a late, often pre-ulcerative stage due to a lack of early systematic screening and the endorsement of monofilament testing which identifies advanced neuropathy only. Compared to the success of the diabetic eye and kidney screening programmes there is clearly an unmet need for an objective reliable biomarker for the detection of early DPN. This article critically appraises research and clinical methods for the diagnosis or screening of early DPN. In brief, functional measures are subjective and are difficult to implement due to technical complexity. Moreover, skin biopsy is invasive, expensive and lacks diagnostic laboratory capacity. Indeed, point-of-care nerve conduction tests are convenient and easy to implement however questions are raised regarding their suitability for use in screening due to the lack of small nerve fibre evaluation. Corneal confocal microscopy (CCM) is a rapid, non-invasive, and reproducible technique to quantify small nerve fibre damage and repair which can be conducted alongside retinopathy screening. CCM identifies early sub-clinical DPN, predicts the development and allows staging of DPN severity. Automated quantification of CCM with AI has enabled enhanced unbiased quantification of small nerve fibres and potentially early diagnosis of DPN. Improved screening tools will prevent and reduce the burden of foot ulceration and amputations with the primary aim of reducing the prevalence of this common microvascular complication.
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18
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Lee Y, Kim S, Shin JW, Leem JG, Choi SS. Adjuvant administration of hypertonic saline in lumbar epidural intervention may be associated with successful response in patients with probable neuropathic radicular pain Screened by Douleur Neuropathique 4. Int J Med Sci 2021; 18:2736-2742. [PMID: 34104106 PMCID: PMC8176191 DOI: 10.7150/ijms.59695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/05/2021] [Indexed: 11/12/2022] Open
Abstract
Background: Chronic lumbar radicular pain often accompanies neuropathic pain. The treatment may follow a screening for probable neuropathic pain rather than the definitive diagnosis, which is often difficult in daily practice. However, interventional management may have limited effects on symptoms in patients with neuropathic radicular pain refractory to conservative treatments. The purpose of this study is to evaluate the factors associated with successful responses after lumbar epidural intervention in patients with chronic lumbar neuropathic radicular pain determined by Douleur Neuropathique 4 (DN4). Methods: We retrospectively reviewed 221 chronic lumbar radicular pain patients using a DN4 questionnaire prior to the epidural interventional procedure. The patients were divided into two groups according to the DN4 questionnaire: <4-point DN4 and ≥4 DN4. The numerical rating scale (NRS) for pain intensity, changes in physical functional status, and the use of pain medication were obtained before and 1 month after the procedure. Successful responder was defined based on robust combination of outcome parameters. The factors associated with successful response were analyzed using univariate and multivariate regression. Results: We found 170 (76.9%) patients with DN4 <4 and 51 (23.1%) with a score ≥4. Among the total 221 patients, 129 (58.4%) were successful responders and 92 (41.6%) were non-responders regardless of DN4 score. We observed a significantly lower proportion of successful responders among patients with a DN4 score ≥4 (22, 43.1%) than patients with a score <4 (107, 62.9%) (P=0.012). After adjusting in multivariate regression analysis, the DN4 score was independently associated with response after lumbar epidural intervention (odds ratio [OR]=0.838; 95% confidence interval [CI]=0.718-0.978; P=0.025). In subgroup logistic regression analysis according to the DN4 score, adjuvant administration of hypertonic saline during epidural interventions in patients with a DN4 score ≥4 (OR=3.71; CI=1.142-12.457; P=0.029) was associated with the success of the lumbar epidural procedure at 1 month. Conclusion: The adjuvant use of hypertonic saline in lumbar epidural interventions may be effective at least 1 month after the intervention in patients with probable neuropathic lumbar radicular pain ≥4 using the DN4.
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Affiliation(s)
- Yongsoo Lee
- Department of Anesthesiology and Pain Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu-Si, Republic of Korea
| | - Sunmin Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin-Woo Shin
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jeong-Gil Leem
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seong-Soo Choi
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Lithfous S, Després O, Pebayle T, Casadio C, Dufour A. Accurate Determination of the Cold Detection Threshold with High-Speed Cooling of the Skin. PAIN MEDICINE 2020; 21:3428-3436. [PMID: 33011804 DOI: 10.1093/pm/pnaa246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study used high-speed cooling of the skin and exact control of stimulus duration to measure the cold detection threshold in healthy participants. The objective was to compare the method of limits, in which the temperature is slowly and gradually increased/decreased until the subject perceives the stimulation, and the method of levels, in which the subject must detect brief thermal stimulations close to the threshold of perception. METHODS Twenty healthy volunteers (nine women, 11 men) aged 20-30 years participated in the study. The method of limits and method of levels were performed in all subjects in a counterbalanced order. Four cold detection thresholds were measured with the method of levels, with a temperature ramp of 300°C/sec and stimulus durations of 50 ms, 100 ms, 300 ms, and 500 ms. Three thresholds were measured with the method of limits, with temperature ramps of 1°C/sec, 2°C/sec, and 4°C/sec. RESULTS On average, the cold detection thresholds were -0.47°C below skin temperature with the method of levels and -1.67°C the method of limits. Interindividual variability was significantly lower with the method of levels than with the method of limits. CONCLUSIONS These results suggest that the method of levels is more accurate than the method of limits for measuring cold detection threshold. The improvement of cold detection threshold measurement may provide new perspectives to more precisely assess the function of A-delta fibers and the spino-thalamic pathway.
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Affiliation(s)
- Segolene Lithfous
- Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364 CNRS-UNISTRA, Strasbourg, France
| | - Olivier Després
- Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364 CNRS-UNISTRA, Strasbourg, France
| | - Thierry Pebayle
- Centre d'Investigations Neurocognitives et Neurophysiologiques, UMS 3489 CNRS-UNISTRA, Strasbourg Cedex, France
| | - Claudia Casadio
- Centre d'Investigations Neurocognitives et Neurophysiologiques, UMS 3489 CNRS-UNISTRA, Strasbourg Cedex, France
| | - Andre Dufour
- Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364 CNRS-UNISTRA, Strasbourg, France.,Centre d'Investigations Neurocognitives et Neurophysiologiques, UMS 3489 CNRS-UNISTRA, Strasbourg Cedex, France
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20
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Effect of Massage on the TLR4 Signalling Pathway in Rats with Neuropathic Pain. Pain Res Manag 2020; 2020:8309745. [PMID: 33381249 PMCID: PMC7759416 DOI: 10.1155/2020/8309745] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 12/08/2020] [Indexed: 01/17/2023]
Abstract
This study set out to investigate the effect of massage on the Toll-like receptor 4 (TLR4) signalling pathway in the dorsal root ganglia of rats that had undergone spinal nerve ligation (SNL), with the hypothesis that massage could be used as an analgesic. Forty female SD rats were randomly divided into 5 groups: the control group, sham-operated group, model group, sham massage group, and massage group. There were 8 rats in each group. SNL rat models were established in the model group, sham massage group, and massage group. Rats in the sham-operated group underwent surgery to expose the vertebral nerves, but no further procedures were performed. The control group consisted of intact animals. The rats in the massage group underwent massage using a massage simulation machine once a day for 14 d in succession; the hind limbs of the rats in the sham massage group were gently touched with a cloth bag once a day for 14 continuous days. The rats in the control group, the sham-operated group, and the model group did not receive any intervention and were observed for 14 d. Paw withdrawal thermal latency (PWTL) and paw withdrawal mechanical threshold (PWMT) of rats in each group were detected 1 d before modelling and at 1, 3, 7, and 14 d after modelling. Fourteen days after modelling, the expression levels of TLR4, IRAK1, TRAF6, TNF-α, and IL-6 were detected in all rats. The PWTL and PWMT of SNL rats were decreased, while these parameters were elevated after massage. SNL rats showed higher levels of TLR4, IRAK1, TRAF6, IL-6, and TNF-α, and massage effectively lowered the expression levels of these molecules. Inhibiting activation of the TLR4 signalling pathway, which can reduce the release of inflammatory factors, may be one mechanism by which massage treats neuropathic pain.
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21
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Di Stefano G, De Stefano G, Leone C, Cruccu G, Tardioli S, Cartocci G, Fiorelli M, Truini A, Caramia F. Concomitant continuous pain in patients with trigeminal neuralgia is associated with trigeminal nerve root atrophy. Cephalalgia 2020; 40:1502-1510. [DOI: 10.1177/0333102420949206] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Introduction Trigeminal neuralgia is an exemplary neuropathic pain condition characterized by paroxysmal electric-shock-like pain. However, up to 50% of patients also experiences concomitant continuous pain. In this neuroimaging study, we aimed to identify the specific anatomical features of trigeminal nerve root in patients with concomitant continuous pain. Methods We enrolled 73 patients with a definitive diagnosis of classical and idiopathic trigeminal neuralgia and 40 healthy participants. The diagnosis of trigeminal neuralgia was independently confirmed by two clinicians. Patients were grouped as patients with purely paroxysmal pain (45 patients) and patients also with concomitant continuous pain (28 patients). All participants underwent a structured clinical examination and a 3T MRI with sequences dedicated to the anatomical study of the trigeminal nerve root, including volumetric study. Images analysis was independently performed by two investigators, blinded to any clinical data. Results In most patients with concomitant continuous pain, this type of pain, described as burning, throbbing or aching, manifested at the disease onset. Demographic and clinical variables did not differ between the two groups of patients; the frequency of neurovascular compression and nerve dislocation were similar. Conversely, trigeminal nerve root atrophy was more severe in patients with concomitant continuous pain than in those with purely paroxysmal pain ( p = 0.006). Conclusions Our clinical and neuroimaging study found that in patients with trigeminal neuralgia, concomitant continuous pain was associated with trigeminal nerve root atrophy, therefore suggesting that this type of pain is likely related to axonal loss and abnormal activity in denervated trigeminal second-order neurons.
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Affiliation(s)
| | | | - Caterina Leone
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Giorgio Cruccu
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Stefano Tardioli
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Gaia Cartocci
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Marco Fiorelli
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Andrea Truini
- Department of Human Neuroscience, Sapienza University, Rome, Italy
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Su Q, Song Y, Zhao R, Liang M. A review on the ongoing quest for a pain signature in the human brain. BRAIN SCIENCE ADVANCES 2020. [DOI: 10.26599/bsa.2019.9050024] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Developing an objective biomarker for pain assessment is crucial for understanding neural coding mechanisms of pain in the human brain as well as for effective treatment of pain disorders. Neuroimaging techniques have been proven to be powerful tools in the ongoing quest for a pain signature in the human brain. Although there is still a long way to go before achieving a truly successful pain signature based on neuroimaging techniques, important progresses have been made through great efforts in the last two decades by the Pain Society. Here, we focus on neural responses to transient painful stimuli in healthy people, and review the relevant studies on the identification of a neuroimaging signature for pain.
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Affiliation(s)
- Qian Su
- Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin’s Clinical Research Center for China, Tianjin 300060, China
- These authors contributed equally to this work
| | - Yingchao Song
- School of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University, Tianjin 300070, China
- These authors contributed equally to this work
| | - Rui Zhao
- Department of Orthopedics Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Meng Liang
- School of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University, Tianjin 300070, China
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Gündüz A, Aydın Ş, Kızıltan M. Cutaneous silent period: A literature review. NEUROL SCI NEUROPHYS 2020. [DOI: 10.4103/nsn.nsn_38_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Powell-Roach KL, Yao Y, Rutherford JN, Schlaeger JM, Patil CL, Suarez ML, Shuey D, Angulo V, Carrasco J, Ezenwa MO, Fillingim RB, Wang ZJ, Molokie RE, Wilkie DJ. Thermal and mechanical quantitative sensory testing values among healthy African American adults. J Pain Res 2019; 12:2511-2527. [PMID: 31496792 PMCID: PMC6693422 DOI: 10.2147/jpr.s211855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/09/2019] [Indexed: 12/26/2022] Open
Abstract
PURPOSE Only a few studies have reported quantitative sensory testing (QST) reference values for healthy African Americans, and those studies are limited in sample size and age of participants. The study purpose was to characterize QST values in healthy, pain-free African American adults and older adults whose prior pain experiences and psychological status were also measured. We examined the QST values for differences by sex, age, and body test site. PATIENTS AND METHODS A cross-sectional sample of 124 pain-free African American adults (age 18-69 years, 49% female) completed demographic and self-reported pain, fatigue and psychosocial measures. QST was performed to obtain thermal and mechanical responses and associated pain intensity levels. RESULTS We found thermal detection values at the anterior forearm were (29.2 °C±1.6) for cool detection (CD) and (34.5 °C±1.2) for warm detection (WD). At that site the sample had cold pain threshold (CPTh) (26.3 °C±5.0), heat pain threshold (HPTh) (37.8 °C±3.6), and mechanical pain thresholds (MPTH) (16.7±22.2 grams of force, gF). There was a significant between sex difference for WD, with women being more sensitive (q=0.027). Lower body sites were less sensitive than upper body sites across all thermal modalities (q<0.003), but not for the mechanical modality. CONCLUSION The QST values from this protocol at the anterior forearm indicate that the healthy African American adults had average thermal pain thresholds close to the temperature of adaptation and average MPTh under 20 gF. Differences in responses to thermal and mechanical stimuli for upper verses lower body were consistent with prior research.
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Affiliation(s)
- Keesha L Powell-Roach
- Department of Community Dentistry and Behavioral Science, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Yingwei Yao
- Department of Biobehavioral Nursing Science, College of Nursing, University of Florida, Gainesville, FL, USA
| | - Julienne N Rutherford
- Department of Women, Children and Family Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Judith M Schlaeger
- Department of Women, Children and Family Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Crystal L Patil
- Department of Women, Children and Family Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Marie L Suarez
- Department of Biobehavioral Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - David Shuey
- Department of Biobehavioral Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Veronica Angulo
- Department of Biobehavioral Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Jesus Carrasco
- Department of Biobehavioral Health Science, College of Nursing, University of Illinois at Chicago, Chicago, IL, USA
| | - Miriam O Ezenwa
- Department of Biobehavioral Nursing Science, College of Nursing, University of Florida, Gainesville, FL, USA
| | - Roger B Fillingim
- Department of Community Dentistry and Behavioral Science, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Zaijie J Wang
- Department of Biopharmaceutical Sciences, College of Pharmacy, Cancer Center, University of Illinois at Chicago, Chicago, IL, USA
| | - Robert E Molokie
- Department of Biopharmaceutical Sciences, College of Pharmacy, Cancer Center, University of Illinois at Chicago, Chicago, IL, USA
- Division of Hematology/Oncology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
- Department of Hematology/Oncology, Jessie Brown Veteran’s Administration Medical Center, Chicago, IL, USA
| | - Diana J Wilkie
- Department of Community Dentistry and Behavioral Science, College of Dentistry, University of Florida, Gainesville, FL, USA
- Department of Biobehavioral Nursing Science, College of Nursing, University of Florida, Gainesville, FL, USA
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Rolim LCSP, da Silva EMK, Flumignan RLG, Abreu MM, Dib SA. Acetyl-L-carnitine for the treatment of diabetic peripheral neuropathy. Cochrane Database Syst Rev 2019; 6:CD011265. [PMID: 31201734 PMCID: PMC6953387 DOI: 10.1002/14651858.cd011265.pub2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Diabetic peripheral neuropathy (DPN) is a common and severe complication that affects 50% of people with diabetes. Painful DPN is reported to occur in 16% to 24% of people with diabetes. A complete and comprehensive management strategy for the prevention and treatment of DPN, whether painful or not, has not yet been defined.Research into treatment for DPN has been characterised by a series of failed clinical trials, with few noteworthy advances. Strategies that support peripheral nerve regeneration and restore neurological function in people with painful or painless DPN are needed. The amino acid acetyl-L-carnitine (ALC) plays a role in the transfer of long-chain fatty acids into mitochondria for β-oxidation. ALC supplementation also induces neuroprotective and neurotrophic effects in the peripheral nervous system. Therefore, ALC supplementation targets several mechanisms relevant to potential nerve repair and regeneration, and could have clinical therapeutic potential. There is a need for a systematic review of the evidence from clinical trials. OBJECTIVES To assess the effects of ALC for the treatment of DPN. SEARCH METHODS On 2 July 2018, we searched the Cochrane Neuromuscular Specialised Register, CENTRAL, MEDLINE, Embase, LILACS, ClinicalTrials.gov, and the World Health Organization International Clinical Trials Registry Platform. We checked references, searched citations, and contacted study authors to identify additional studies. SELECTION CRITERIA We included randomised controlled trials (RCTs) and quasi-RCTs of ALC compared with placebo, other therapy, or no intervention in the treatment of DPN. Participants could be of any sex and age, and have type 1 or type 2 diabetes mellitus, of any severity, with painful or painless DPN. We accepted any definition of minimum criteria for DPN, in accordance with the Toronto Consensus. We imposed no language restriction.Pain was the primary outcome, measured as the proportion of participants with at least 30% (moderate) or 50% (substantial) decrease in pain over baseline, or as the score on a visual analogue scale (VAS) or Likert scale for pain. DATA COLLECTION AND ANALYSIS We followed standard Cochrane methods. MAIN RESULTS We included four studies with 907 participants, which were reported in three publications. Three trials studied ALC versus placebo (675 participants); in one trial the dose of ALC was 2000 mg/day, and in the other two trials, it was 1500 mg/day or 3000 mg/day. The fourth trial studied ALC 1500 mg/day versus methylcobalamin 1.5 mg/day (232 participants). The risk of bias was high in both trials of different ALC doses and low in the other two trials.No included trial measured the proportion of participants with at least moderate (30%) or substantial (50%) pain relief. ALC reduced pain more than placebo, measured on a 0- to 100-mm VAS (MD -9.16, 95% CI -16.76 to -1.57; three studies; 540 participants; P = 0.02; I² = 56%; random-effects; very low-certainty evidence; a higher score indicating more pain). At doses of 1500 mg/day or less, the VAS score after ALC treatment was little different from placebo (MD -0.05, 95% CI -10.00 to 9.89; two studies; 159 participants; P = 0.99; I² = 0%), but at doses greater than 1500 mg/day, ALC reduced pain more than placebo (MD -14.93, 95% CI -19.16 to -10.70; three studies; 381 participants; P < 0.00001; I² = 0%). This subgroup analysis should be viewed with caution as the evidence was even less certain than the overall analysis, which was already of very low certainty.Two placebo-controlled studies reported that vibration perception improved after 12 months. We graded this evidence as very low certainty, due to inconsistency and a high risk of bias, as the trial authors did not provide any numerical data. The placebo-controlled studies did not measure functional impairment and disability scores. No study used validated symptom scales. One study performed sensory testing, but the evidence was very uncertain.The fourth included study compared ALC with methylcobalamin, but did not report effects on pain. There was a reduction from baseline to 24 weeks in functional impairment and disability, based on the change in mean Neuropathy Disability Score (NDS; scale from zero to 10), but there was no important difference between the ALC group (mean score 1.66 ± 1.90) and the methylcobalamin group (mean score 1.35 ± 1.65) groups (P = 0.23; low-certainty evidence).One placebo-controlled study reported that six of 147 participants in the ALC > 1500 mg/day group (4.1%) and two of 147 participants in the placebo group (1.4%) discontinued treatment because of adverse events (headache, facial paraesthesia, and gastrointestinal disorders) (P = 0.17). The other two placebo-controlled studies reported no dropouts due to adverse events, and more pain, paraesthesia, and hyperaesthesias in the placebo group than the 3000 mg/day ALC group, but provided no numerical data. The overall certainty of adverse event evidence for the comparison of ALC versus placebo was low.The study comparing ALC with methylcobalamin reported that 34/117 participants (29.1%) experienced adverse events in the ALC group versus 33/115 (28.7%) in the methylcobalamin group (P = 0.95). Nine participants discontinued treatment due to adverse events (ALC: 4 participants, methylcobalamin: 5 participants), which were most commonly gastrointestinal symptoms. The certainty of the adverse event evidence for ALC versus methylcobalamin was low.Two studies were funded by the manufacturer of ALC and the other two studies had at least one co-author who was a consultant for an ALC manufacturer. AUTHORS' CONCLUSIONS We are very uncertain whether ALC causes a reduction in pain after 6 to 12 months' treatment in people with DPN, when compared with placebo, as the evidence is sparse and of low certainty. Data on functional and sensory impairment and symptoms are lacking, or of very low certainty. The evidence on adverse events is too uncertain to make any judgements on safety.
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Affiliation(s)
- Luiz CSP Rolim
- Universidade Federal de São PauloDepartment of Internal MedicineRua Borges Lagoa, 1065/110São PauloSão PauloBrazil04038‐032
| | - Edina MK da Silva
- Universidade Federal de São PauloEmergency Medicine and Evidence Based MedicineRua Borges Lagoa 564 cj 64Vl. ClementinoSão PauloSão PauloBrazil04038‐000
| | - Ronald LG Flumignan
- Universidade Federal de São PauloDepartment of Surgery, Division of Vascular and Endovascular SurgeryRua Borges Lagoa, 754São PauloSPBrazil04038‐001
| | - Marcio M Abreu
- Yale University School of MedicineAnaesthesiology and Critical Care Medicine333 Cedar Street, TMP 3P.O. Box 208051New HavenCTUSA06520‐8051
| | - Sérgio A Dib
- Universidade Federal de São PauloDepartment of Medicine / EndocrinologyRua Pedro de Toledo, 910São PauloSão PauloBrazil04038‐000
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Degu H, Wondimagegnehu A, Yifru YM, Belachew A. Is health related quality of life influenced by diabetic neuropathic pain among type II diabetes mellitus patients in Ethiopia? PLoS One 2019; 14:e0211449. [PMID: 30716109 PMCID: PMC6361436 DOI: 10.1371/journal.pone.0211449] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 01/15/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Polyneuropathy is one of the commonest complications of long-standing diabetes. Progressive sensory loss can predispose patients to foot ulcer and the neuropathy oftentimes causes pain. The pain can significantly affect the quality of life of patients. OBJECTIVES To describes the health-related quality of life of patients with type II diabetes mellitus suffering from painful diabetic peripheral neuropathy at two referral hospitals in Addis Ababa, Ethiopia, 2017. METHODS An institution based cross sectional study with internal comparison was conducted among a sample of 220 type II diabetes mellitus patients in a 1:1 matched ratio of those with and without diabetes associated peripheral neuropathic pain. All were having regular follow up at two hospitals in Addis Ababa, Ethiopia. The Short Form (SF-36) health-related quality of life instrument was used to collect data on quality of life while basic socio-demographic and other disease specific features were collected using a structured questionnaire. Descriptive statistics was used to examine the mean scores of health related quality of life. Cronbach's alpha coefficient and Pearson's correlation coefficient were applied to estimate the internal consistency, and the level of agreement between the different domains of SF-36, respectively. To measure association between health related quality of life domains and explanatory variables, independent T-test and ANOVA were performed followed by multiple linear regression analyses. RESULTS The health related quality of life of type II diabetes mellitus patients with peripheral neuropathic pain was poorer than those without pain in all the eight domains and the two summary scores by SF-36 (p < 0.001). Higher mean score difference was observed in Mental Component Summary Score (MCS) (14.6) compared to Physical Component Score (PCS) (9.3). Among the eight domains, the largest mean difference was found with the physical one (39.1) followed by mental health (38.2) and physical functioning (30). Pain intensity had a statistically significant negative correlation with all domains as well as the two summary scores. Younger age, a higher level of education, being single, a higher monthly income, normal body mass index, HbA1c less than seven mmo/L, absence of other diabetic complications and taking only oral hypoglycemic agents were found to predict better health related quality of life. CONCLUSION The presence of diabetic peripheral neuropathic pain was found to negatively influence the health-related quality of life of type II diabetic patients; the greatest impact being on the 'role physical' and 'mental health' domains. Older age, presence of diabetes related complications, longer duration of illness negatively influenced the health-related quality of life.
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Affiliation(s)
- Hiwot Degu
- Department of Preventive Medicine, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Abigiya Wondimagegnehu
- Department of Preventive Medicine, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Yared Mamushet Yifru
- Department of Neurology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ayele Belachew
- Department of Preventive Medicine, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
- * E-mail:
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Leysen L, Adriaenssens N, Nijs J, Pas R, Bilterys T, Vermeir S, Lahousse A, Beckwée D. Chronic Pain in Breast Cancer Survivors: Nociceptive, Neuropathic, or Central Sensitization Pain? Pain Pract 2018; 19:183-195. [DOI: 10.1111/papr.12732] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 07/07/2018] [Accepted: 07/29/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Laurence Leysen
- Pain in Motion International Research Group; Brussels Belgium
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
| | - Nele Adriaenssens
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
- Department of Oncology; University Hospital Brussels; Brussels Belgium
| | - Jo Nijs
- Pain in Motion International Research Group; Brussels Belgium
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
- Department of Physical Medicine and Physiotherapy; University Hospital Brussels; Brussels Belgium
| | - Roselien Pas
- Pain in Motion International Research Group; Brussels Belgium
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
| | - Thomas Bilterys
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
| | - Sofie Vermeir
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
| | - Astrid Lahousse
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
| | - David Beckwée
- Department of Physiotherapy, Human Physiology and Anatomy; Faculty of Physical Education & Physiotherapy; Vrije Universiteit Brussel; Brussels Belgium
- Frailty in Ageing Research Department; Vrije Universiteit Brussel; Brussels Belgium
- Department of Rehabilitation Sciences and Physiotherapy; Faculty of Medicine and Health Sciences; University of Antwerp; Antwerp Belgium
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Themistocleous AC, Crombez G, Baskozos G, Bennett DL. Using stratified medicine to understand, diagnose, and treat neuropathic pain. Pain 2018; 159 Suppl 1:S31-S42. [PMID: 30113945 PMCID: PMC6130809 DOI: 10.1097/j.pain.0000000000001301] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - Geert Crombez
- Department of Experimental-Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Georgios Baskozos
- The Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - David L Bennett
- The Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
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Timmerman H, Wilder-Smith OH, Steegers MA, Vissers KC, Wolff AP. The added value of bedside examination and screening QST to improve neuropathic pain identification in patients with chronic pain. J Pain Res 2018; 11:1307-1318. [PMID: 30022849 PMCID: PMC6044357 DOI: 10.2147/jpr.s154698] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Background The assessment of a neuropathic pain component (NePC) to establish the neurological criteria required to comply with the clinical description is based on history taking, clinical examination, and quantitative sensory testing (QST) and includes bedside examination (BSE). The objective of this study was to assess the potential association between the clinically diagnosed presence or absence of an NePC, BSE, and the Nijmegen–Aalborg screening QST (NASQ) paradigm in patients with chronic (≥3 months) low back and leg pain or with neck shoulder arm pain or in patients with chronic pain due to suspected peripheral nerve damage. Methods A total of 291 patients participated in the study. Pain (absence or presence of neuro-pathic pain) was assessed independently by two physicians and compared with BSE (measurements of touch [finger, brush], heat, cold, pricking [safety pin, von Frey hair], and vibration). The NASQ paradigm (pressure algometry, electrical pain thresholds, and conditioned pain modulation) was assessed in 58 patients to generate new insights. Results BSE revealed a low association of differences between patients with either absent or present NePC: heat, cold, and pricking sensations with a von Frey hair were statistically significantly less common in patients with present NePC. NASQ did not reveal any differences between patients with and without an NePC. Conclusion Currently, a standardized BSE appears to be more useful than the NASQ paradigm when distinguishing between patients with and without an NePC.
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Affiliation(s)
- Hans Timmerman
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, the Netherlands,
| | - Oliver Hg Wilder-Smith
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, the Netherlands, .,Center for Sensory-Motor Interaction, Aalborg University, Aalborg, Denmark
| | - Monique Ah Steegers
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Kris Cp Vissers
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - André P Wolff
- Department of Anesthesiology, Pain Center, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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Timmerman H, Wolff AP, Bronkhorst EM, Wilder-Smith OHG, Schenkels MJ, van Dasselaar NT, Huygen FJPM, Steegers MAH, Vissers KCP. Avoiding Catch-22: validating the PainDETECT in a in a population of patients with chronic pain. BMC Neurol 2018; 18:91. [PMID: 29958535 PMCID: PMC6026336 DOI: 10.1186/s12883-018-1094-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 06/22/2018] [Indexed: 12/19/2022] Open
Abstract
Background Neuropathic pain is defined as pain caused by a lesion or disease of the somatosensory nervous system and is a major therapeutic challenge. Several screening tools have been developed to help physicians detect patients with neuropathic pain. These have typically been validated in populations pre-stratified for neuropathic pain, leading to a so called “Catch-22 situation:” “a problematic situation for which the only solution is denied by a circumstance inherent in the problem or by a rule”. The validity of screening tools needs to be proven in patients with pain who were not pre-stratified on basis of the target outcome: neuropathic pain or non-neuropathic pain. This study aims to assess the validity of the Dutch PainDETECT (PainDETECT-Dlv) in a large population of patients with chronic pain. Methods A cross-sectional multicentre design was used to assess PainDETECT-Dlv validity. Included where patients with low back pain radiating into the leg(s), patients with neck-shoulder-arm pain and patients with pain due to a suspected peripheral nerve damage. Patients’ pain was classified as having a neuropathic pain component (yes/no) by two experienced physicians (“gold standard”). Physician opinion based on the Grading System was a secondary comparison. Results In total, 291 patients were included. Primary analysis was done on patients where both physicians agreed upon the pain classification (n = 228). Compared to the physician’s classification, PainDETECT-Dlv had a sensitivity of 80% and specificity of 55%, versus the Grading System it achieved 74 and 46%. Conclusion Despite its internal consistency and test-retest reliability the PainDETECT-Dlv is not an effective screening tool for a neuropathic pain component in a population of patients with chronic pain because of its moderate sensitivity and low specificity. Moreover, the indiscriminate use of the PainDETECT-Dlv as a surrogate for clinical assessment should be avoided in daily clinical practice as well as in (clinical-) research. Catch-22 situations in the validation of screening tools can be prevented by not pre-stratifying the patients on basis of the target outcome before inclusion in a validation study for screening instruments. Trial registration The protocol was registered prospectively in the Dutch National Trial Register: NTR 3030. Electronic supplementary material The online version of this article (10.1186/s12883-018-1094-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hans Timmerman
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud university medical center, Huispost 549, PO Box 9101, 6500, HB, Nijmegen, the Netherlands.
| | - André P Wolff
- Department of Anesthesiology, Pain Center, University of Groningen, University medical center Groningen, Groningen, the Netherlands
| | - Ewald M Bronkhorst
- Department for Health Evidence, Radboud university medical center, Nijmegen, the Netherlands
| | - Oliver H G Wilder-Smith
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud university medical center, Huispost 549, PO Box 9101, 6500, HB, Nijmegen, the Netherlands.,Center for Sensory-Motor Interaction, Aalborg University, Aalborg, Denmark
| | - Marcel J Schenkels
- Bernhoven Ziekenhuis, Department of Anesthesiology, Uden, the Netherlands
| | - Nick T van Dasselaar
- Reinier de Graaf Gasthuis, Department of Anesthesiology, Pain Medicine and Palliative Care, Delft, the Netherlands
| | - Frank J P M Huygen
- ErasmusMC, Department of Anesthesiology, University Center of Pain Medicine, Rotterdam, the Netherlands
| | - Monique A H Steegers
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud university medical center, Huispost 549, PO Box 9101, 6500, HB, Nijmegen, the Netherlands
| | - Kris C P Vissers
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud university medical center, Huispost 549, PO Box 9101, 6500, HB, Nijmegen, the Netherlands
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Moura BDS, Ferreira NDR, DosSantos MF, Janini MER. Changes in the vibration sensitivity and pressure pain thresholds in patients with burning mouth syndrome. PLoS One 2018; 13:e0197834. [PMID: 29782537 PMCID: PMC5962090 DOI: 10.1371/journal.pone.0197834] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 05/09/2018] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To investigate the presence of changes in vibration detection and pressure pain threshold in patients with burning-mouth syndrome (BMS). DESIGN OF THE STUDY Case-control study. The sample was composed of 30 volunteers, 15 with BMS and 15 in the control group. The pressure-pain threshold (PPT) and vibration-detection threshold (VDT) were examined. The clinical evaluation was complemented with the McGill Pain Questionnaire (MPQ), Douleur Neuropathique 4 (DN4) and Beck Depression and Anxiety Inventories (BDI and BAI, respectively). RESULTS BMS subjects showed a statistically significant higher PPT in the tongue (p = 0.002), right (p = 0.001) and left (p = 0.004) face, and a significant reduction of the VDT in the tongue (p = 0.013) and right face (p = 0.030). Significant differences were also found when comparing the PPT and the VDT of distinct anatomical areas. However, a significant interaction (group × location) was only for the PPT. BMS subjects also showed significantly higher levels of depression (p = 0.01), as measured by the BDI, compared to controls; and a significant inverse correlation between the VDT in the left face and anxiety levels was detected. CONCLUSIONS The study of somatosensory changes in BMS and its correlations with the clinical features as well as the levels of anxiety and depression expands current understanding of the neuropathic origin and the possible contribution of psychogenic factors related to this disease.
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Affiliation(s)
- Brenda de Souza Moura
- Departamento de Patologia e Diagnóstico Oral, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Natália dos Reis Ferreira
- Programa de Pós-Graduação em Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos F. DosSantos
- Programa de Pós-Graduação em Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratório de Morfogênese Celular (LMC), Instituto de Ciências Biomédicas (ICB), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria Elisa Rangel Janini
- Departamento de Patologia e Diagnóstico Oral, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Eberhard L, Terebesi S, Giannakopoulos NN, Hellmann D, Schindler HJ, Schmitter M, Pfau D. Quantitative sensory response of the SCM muscle on sustained low level activation simulating co-contractions during bruxing. Arch Oral Biol 2017; 86:87-93. [PMID: 29202311 DOI: 10.1016/j.archoralbio.2017.09.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 07/20/2017] [Accepted: 09/24/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Bruxism is discussed as an etiological factor in the pathogenesis of orofacial and cervical pain. As the sternocleidomastoid muscle (SCM) is co-activated during clenching, our aim was to investigate, whether the muscle loading leads to peripheral or central sensitizations. DESIGN In twenty-one healthy female volunteers, somatosensory profiles of the SCM were recorded according to the test battery of the German Research Network on Neuropathic Pain (DFNS) prior to and after an isometric muscle exercise. QST comprised thermal and mechanical stimuli. A submaximal activation of the SCM (15% MVC) was kept for 10min in sitting position. In separate test sessions one month apart, one sham and one verum experiment were conducted in randomized order. During the muscle loading, the parameters cold detection threshold (CDT), mechanical pain sensitivity (MPS) and pressure pain treshold (PPT) were tested and experimental pain recorded by visual analogoue scales (VAS). All test sessions were performed during the follicular phase of the menstrual cycle (day 5), to avoid effects on pain perception. Data were analyzed with Repeated Measures ANOVA (SPSS 22.0) RESULTS: No significant changes were found during or after (sham) loading except for stimulus-response-function (SR, P=0.01) and PPT (P=0.02) in the sham test. No effect was observed in the verum experiment (P=0.12 up to 1.0). CONCLUSION Prolonged low level contraction of the SCM does not evoke painful sensitization. In contrast, submaximal muscle activation seems to have a protective effect corresponding to a training effect preventing sensitization.
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Affiliation(s)
- Lydia Eberhard
- Department of Prosthodontics, University of Heidelberg, Heidelberg, Germany.
| | - Sophia Terebesi
- Department of Prosthodontics, University of Würzburg, Würzburg, Germany
| | | | - Daniel Hellmann
- Department of Prosthodontics, University of Würzburg, Würzburg, Germany
| | | | - Marc Schmitter
- Department of Prosthodontics, University of Würzburg, Würzburg, Germany
| | - Doreen Pfau
- Department of Neurophysiology, Center of Biomedicine and Medical Technology Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Investigating the validity of the DN4 in a consecutive population of patients with chronic pain. PLoS One 2017; 12:e0187961. [PMID: 29190718 PMCID: PMC5708633 DOI: 10.1371/journal.pone.0187961] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/30/2017] [Indexed: 11/19/2022] Open
Abstract
Neuropathic pain is clinically described as pain caused by a lesion or disease of the somatosensory nervous system. The aim of this study was to assess the validity of the Dutch version of the DN4, in a cross-sectional multicentre design, as a screening tool for detecting a neuropathic pain component in a large consecutive, not pre-stratified on basis of the target outcome, population of patients with chronic pain. Patients' pain was classified by two independent (pain-)physicians as the gold standard. The analysis was initially performed on the outcomes of those patients (n = 228 out of 291) in whom both physicians agreed in their pain classification. Compared to the gold standard the DN4 had a sensitivity of 75% and specificity of 76%. The DN4-symptoms (seven interview items) solely resulted in a sensitivity of 70% and a specificity of 67%. For the DN4-signs (three examination items) it was respectively 75% and 75%. In conclusion, because it seems that the DN4 helps to identify a neuropathic pain component in a consecutive population of patients with chronic pain in a moderate way, a comprehensive (physical-) examination by the physician is still obligate.
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de Tommaso M, Ricci K, Libro G, Vecchio E, Delussi M, Montemurno A, Lopalco G, Iannone F. Pain Processing and Vegetative Dysfunction in Fibromyalgia: A Study by Sympathetic Skin Response and Laser Evoked Potentials. PAIN RESEARCH AND TREATMENT 2017; 2017:9747148. [PMID: 29093972 PMCID: PMC5637844 DOI: 10.1155/2017/9747148] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 08/09/2017] [Accepted: 08/17/2017] [Indexed: 12/20/2022]
Abstract
BACKGROUND A dysfunction of pain processing at central and peripheral levels was reported in fibromyalgia (FM). We aimed to correlate laser evoked potentials (LEPs), Sympathetic Skin Response (SSR), and clinical features in FM patients. METHODS Fifty FM patients and 30 age-matched controls underwent LEPs and SSR by the right hand and foot. The clinical evaluation included FM disability (FIQ) and severity scores (WPI), anxiety (SAS) and depression (SDS) scales, and questionnaires for neuropathic pain (DN4). RESULTS The LEP P2 latency and amplitude and the SSR latency were increased in FM group. This latter feature was more evident in anxious patients. The LEPs habituation was reduced in FM patients and correlated to pain severity scores. In a significant number of patients (32%) with higher DN4 and FIQ scores, SSR or LEP responses were absent. CONCLUSIONS LEPs and SSR might contribute to clarifying the peripheral and central nervous system involvement in FM patients.
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Affiliation(s)
- Marina de Tommaso
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Katia Ricci
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Giuseppe Libro
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Eleonora Vecchio
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Marianna Delussi
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Anna Montemurno
- Neurophysiopathology of Pain Laboratory, Basic Medical Science, Neuroscience and Sensory System Department, Bari Aldo Moro University, Bari, Italy
| | - Giuseppe Lopalco
- Department of Emergency and Organ Transplantation, Bari Aldo Moro University, Bari, Italy
| | - Florenzo Iannone
- Department of Emergency and Organ Transplantation, Bari Aldo Moro University, Bari, Italy
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Wood P, Small C, Lewis S, Mahoney P. Neuropathic pain treatment and research: experiences from the United Kingdom mission to Afghanistan and future prospects. J ROY ARMY MED CORPS 2017; 164:207-212. [DOI: 10.1136/jramc-2017-000820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/21/2017] [Accepted: 07/27/2017] [Indexed: 11/04/2022]
Abstract
The Defence Medical Services (DMS) of the United Kingdom (UK) assumed command of the Role 3 Medical Treatment Facility field hospital during Operation HERRICK in Afghanistan from April 2006 until the final drawdown in November 2014. The signature injury sustained by coalition personnel during this period was traumatic amputation from improvised explosive devices. Many patients who had suffered extensive tissue damage experienced both nociceptive and neuropathic pain (NeuP). This presented as a heterogeneous collection of symptoms that are resistant to treatment. This paper discusses the relationship of NeuP in the context of ballistic injury, drawing in particular on clinical experience from the UK mission to Afghanistan, Operation HERRICK. The role of this paper is to describe the difficulties of assessment, treatment and research of NeuP and make recommendations for future progress within the DMS.
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Lin JH, Hsieh YC, Chen YC, Wang Y, Chen CC, Chiang YH. Diagnostic accuracy of standardised qualitative sensory test in the detection of lumbar lateral stenosis involving the L5 nerve root. Sci Rep 2017; 7:10598. [PMID: 28878316 PMCID: PMC5587645 DOI: 10.1038/s41598-017-10641-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/14/2017] [Indexed: 12/31/2022] Open
Abstract
Misdiagnosis of symptomatic lumbar lateral stenosis (LS) may result in an unfavourable prognosis after surgical treatment. This study investigated the diagnostic accuracy of a standardised qualitative sensory test (SQST) in the detection of symptomatic LS in patients who had degenerative spinal disorders involving the L5 spinal nerve. We prospectively identified 75 patients, of which 60 met the inclusion criteria. Lateral recess stenosis at the L5 level or foraminal stenosis at the L5/S1 level on MRI was identified and graded by a neurosurgeon blinded to any clinical information. The reference criteria for the diagnosis of symptomatic LS were grade III LS on MRI and relevant clinical symptoms. Cutaneous sensory functions of the L5 dermatome on the symptomatic side were evaluated using the SQST. Each item of the SQST showed a satisfactory performance in the diagnosis of LS (sensitivity = 0.455-0.727, specificity = 0.868-1.0). A stepwise selection model identified low-strength von-Frey, high-strength von-Frey, and vibration as the most accurate predictors of symptomatic LS with an area under the receiver operating characteristic curve of 0.9563 (95% confidence interval = 0.9003-1.0). In combination with MRI, the SQST is a promising diagnostic tool for detecting symptomatic LS involving L5 nerve roots.
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Affiliation(s)
- Jiann-Her Lin
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University and National Health Research Institutes, Taipei, Taiwan
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei, Taiwan
- Division of Neurosurgery, Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yi-Chen Hsieh
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University and National Health Research Institutes, Taipei, Taiwan
| | - Yi-Chen Chen
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yun Wang
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University and National Health Research Institutes, Taipei, Taiwan
| | - Chih-Cheng Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yung-Hsiao Chiang
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University and National Health Research Institutes, Taipei, Taiwan.
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei, Taiwan.
- Division of Neurosurgery, Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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Di Stefano G, Maarbjerg S, Nurmikko T, Truini A, Cruccu G. Triggering trigeminal neuralgia. Cephalalgia 2017; 38:1049-1056. [PMID: 28708009 DOI: 10.1177/0333102417721677] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Introduction Although it is widely accepted that facial pain paroxysms triggered by innocuous stimuli constitute a hallmark sign of trigeminal neuralgia, very few studies to date have systematically investigated the role of the triggers involved. In the recently published diagnostic classification, triggered pain is an essential criterion for the diagnosis of trigeminal neuralgia but no study to date has been designed to address this issue directly. In this study, we set out to determine, in patients with trigeminal neuralgia, how frequently triggers are present, which manoeuvres activate them and where cutaneous and mucosal trigger zones are located. Methods Clinical characteristics focusing on trigger factors were collected from 140 patients with trigeminal neuralgia, in a cross-sectional study design. Results Provocation of paroxysmal pain by various trigger manoeuvres was reported by 136 of the 140 patients. The most frequent manoeuvres were gentle touching of the face (79%) and talking (54%). Trigger zones were predominantly reported in the perioral and nasal region. Conclusion This study confirms that in trigeminal neuralgia, paroxysmal pain is associated with triggers in virtually all patients and supports the use of triggers as an essential diagnostic feature of trigeminal neuralgia.
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Affiliation(s)
- Giulia Di Stefano
- 1 Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Stine Maarbjerg
- 2 Danish Headache Center, Department of Neurology, Rigshospitalet - Glostrup, University of Copenhagen, Denmark
| | - Turo Nurmikko
- 3 Pain Research Institute, Clinical Sciences Centre, University of Liverpool, Liverpool, UK
| | - Andrea Truini
- 1 Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Giorgio Cruccu
- 1 Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
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Lindbäck Y, Tropp H, Enthoven P, Gerdle B, Abbott A, Öberg B. Altered somatosensory profile according to quantitative sensory testing in patients with degenerative lumbar spine disorders scheduled for surgery. BMC Musculoskelet Disord 2017. [PMID: 28623897 PMCID: PMC5474047 DOI: 10.1186/s12891-017-1581-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background Somatosensory profiling in affected and non-affected body regions can strengthen our insight regarding the underlying pain mechanisms, which can be valuable in treatment decision making and to improve outcomes, in patients with degenerative lumbar spine disorders pre-surgery. The aim was to describe somatosensory profiles in patients with degenerative lumbar spine disorders, to identify the proportion with altered somatosensory profile, and to analyze demographic characteristics, self-reported function, pain, and health pre- and 3 months post-surgery. Methods In this prospective cohort study in a Spine Clinic, 105 patients scheduled for surgery for spinal stenosis, disc herniation, degenerative disc disease, or spondylolisthesis were consecutively recruited. Exclusion criteria were; indication for acute surgery or previous surgery at the same spinal level or severe grade of pathology. Quantitative sensory testing (QST) and self-reported function, pain, and health was measured pre- and 3 months post-surgery. The somatosensory profile included cold detection threshold, warmth detection threshold, cold pain threshold, heat pain threshold and pressure pain threshold in affected and non-affected body regions. Results On a group level, the patients’ somatosensory profiles were within the 95% confidence interval (CI) from normative reference data means. On an individual level, an altered somatosensory profile was defined as having two or more body regions (including a non-affected region) with QST values outside of normal ranges for reference data. The 23 patients (22%) with altered somatosensory profiles, with mostly loss of function, were older (P = 0.031), more often female (P = 0.005), had higher back and leg pain (P = 0.016, 0.020), lower mental health component summary score (SF-36 MCS) (P = 0.004) and larger pain distribution (P = 0.047), compared to others in the cohort. Post-surgery there was a tendency to worse pain, function and health in the group with altered somatosensory profile pre-surgery. Conclusions On a group level, patients with degenerative lumbar spine disorders scheduled for surgery were within normal range for the QST measurements compared to reference values. On an individual level, an altered somatosensory profile outside of normal range in both affected and non-affected body regions occurred in 22% of patients, which may indicate disturbed somatosensory function. Those patients had mostly loss of sensory function and had worse self-reported outcome pre-surgery, compared to the rest of the cohort. Future prospective studies are needed to further examine whether these dimensions can be useful in predicting post-surgery outcome and guide need of additional treatments.
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Affiliation(s)
- Yvonne Lindbäck
- Department of Medical and Health Sciences, Division of Physiotherapy, Faculty of Medicine and Health Sciences, Linköping University, SE-581 83, Linköping, Sweden. .,, .
| | - Hans Tropp
- Department of Spinal Surgery and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.,Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
| | - Paul Enthoven
- Department of Medical and Health Sciences, Division of Physiotherapy, Faculty of Medicine and Health Sciences, Linköping University, SE-581 83, Linköping, Sweden.,
| | - Björn Gerdle
- Pain and Rehabilitation Center, and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Allan Abbott
- Department of Medical and Health Sciences, Division of Physiotherapy, Faculty of Medicine and Health Sciences, Linköping University, SE-581 83, Linköping, Sweden.,Faculty of Health Science and Medicine, Bond University, Gold Coast, QLD, 4229, Australia.,
| | - Birgitta Öberg
- Department of Medical and Health Sciences, Division of Physiotherapy, Faculty of Medicine and Health Sciences, Linköping University, SE-581 83, Linköping, Sweden.,
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Hartmann A, Welte-Jzyk C, Seiler M, Daubländer M. Neurophysiological changes associated with implant-associated augmentation procedures in the lower jaw. Clin Implant Dent Relat Res 2017; 19:725-732. [PMID: 28556476 DOI: 10.1111/cid.12500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND Neurophysiological changes after oral and maxillofacial surgery remain one of the topics of current research. PURPOSE This study evaluated if implant placement associated with augmentation procedures increases the possibility of sensory disturbances or result in impaired quality of life during the healing period. MATERIAL AND METHODS Patients who had obtained an implant placement in the lower jaw in combination with augmentation procedures were examined by implementing a comprehensive Quantitative Sensory Testing (QST) protocol for extra- and intraoral use. As augmentation procedures, we used Guided Bone Regeneration (Group A) and Customized Bone Regeneration (Group B) techniques. Patients were tested bilaterally at the chin and mucosal lower lip. Results were compared to a group without augmentation procedures (Group C). Patients' quality of life and psychological comorbidity after the surgical procedures was assessed with the Oral Health Impact Profile and the Hospital Anxiety and Depression Scale. RESULTS For groups A (n = 20) and B (n = 8), mechanical QST parameters showed no significant differences in all qualities of the inferior alveolar nerve compared to the contralateral side and compared to the nonaugmentation control group (n = 32) as well. Evaluation of quality of life and psychological factors showed no statistical differences. CONCLUSIONS Augmentation procedures did not increase sensory disturbances, indicating no changes in the neurophysiological pathways. Extended augmentation procedures did not lead to sensory changes either or result in an impaired quality of life or modified anxiety and depression scores.
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Affiliation(s)
- Amely Hartmann
- Department of Oral and Maxillofacial Surgery, Private Practice Dr. Seiler and colleagues, Filderstadt, Germany
| | - Claudia Welte-Jzyk
- Department of Oral Surgery, University Medical Centre of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Marcus Seiler
- Department of Oral and Maxillofacial Surgery, Private Practice Dr. Seiler and colleagues, Filderstadt, Germany
| | - Monika Daubländer
- Department of Oral Surgery, University Medical Centre of the Johannes Gutenberg University of Mainz, Mainz, Germany
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Dureja GP, Iyer RN, Das G, Ahdal J, Narang P. Evidence and consensus recommendations for the pharmacological management of pain in India. J Pain Res 2017; 10:709-736. [PMID: 28435313 PMCID: PMC5386610 DOI: 10.2147/jpr.s128655] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Despite enormous progress in the field of pain management over the recent years, pain continues to be a highly prevalent medical condition worldwide. In the developing countries, pain is often an undertreated and neglected aspect of treatment. Awareness issues and several misconceptions associated with the use of analgesics, fear of adverse events - particularly with opioids and surgical methods of analgesia - are major factors contributing to suboptimal treatment of pain. Untreated pain, as a consequence, is associated with disability, loss of income, unemployment and considerable mortality; besides contributing majorly to the economic burden on the society and the health care system in general. Available guidelines suggest that a strategic treatment approach may be helpful for physicians in managing pain in real-world settings. The aim of this manuscript is to propose treatment recommendations for the management of different types of pain, based on the available evidence. Evidence search was performed by using MEDLINE (by PubMed) and Cochrane databases. The types of articles included in this review were based on randomized control studies, case-control or cohort studies, prospective and retrospective studies, systematic reviews, meta-analyses, clinical practice guidelines and evidence-based consensus recommendations. Articles were reviewed by a multidisciplinary expert panel and recommendations were developed. A stepwise treatment algorithm-based approach based on a careful diagnosis and evaluation of the underlying disease, associated comorbidities and type/duration of pain is proposed to assist general practitioners, physicians and pain specialists in clinical decision making.
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Affiliation(s)
| | - Rajagopalan N Iyer
- Department of Orthopaedics, Raja Rajeswari Medical College and Hospital, Bengaluru, Karnataka
| | - Gautam Das
- Daradia Pain Clinic, Kolkata, West Bengal
| | - Jaishid Ahdal
- Department of Medical Affairs, Janssen India, Johnson & Johnson Pvt Ltd, Mumbai, Maharashtra, India
| | - Prashant Narang
- Department of Medical Affairs, Janssen India, Johnson & Johnson Pvt Ltd, Mumbai, Maharashtra, India
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Hartmann A, Seeberger R, Bittner M, Rolke R, Welte-Jzyk C, Daubländer M. Profiling intraoral neuropathic disturbances following lingual nerve injury and in burning mouth syndrome. BMC Oral Health 2017; 17:68. [PMID: 28330489 PMCID: PMC5363027 DOI: 10.1186/s12903-017-0360-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 03/08/2017] [Indexed: 01/03/2023] Open
Abstract
Background The aim of the study was to analyse intraoral neurophysiological changes in patients with unilateral lingual nerve lesions as well as patients with Burning Mouth Syndrome (BMS) by applying a standardized Quantitative Sensory Testing (QST) protocol. Methods The study included patients suffering from a peripheral lesion of the lingual nerve (n = 4), from BMS (n = 5) and healthy controls (n = 8). Neurophysiological tests were performed in the innervation areas of the tongue bilaterally. For BMS patients the dorsal foot area was used as reference. Results For patients with peripheral lesion of the lingual nerve the affected side of the tongue showed increased thresholds for thermal (p < 0.05–0.001) and mechanical (p < 0.01–0.001) QST parameters, indicating a hypoesthesia and thermal hypofunction. In BMS patients, a pinprick hypoalgesia (p < 0.001), a cold hyperalgesia (p < 0.01) and cold/warmth hypoesthesia (p < 0.01) could be detected. Conclusions The results of this study verified the lingual nerve lesion in our patients as a peripheral dysfunction. The profile showed a loss of sensory function for small and large fibre mediated stimuli. A more differentiated classification of the lingual nerve injury was possible with QST, regarding profile, type and severity of the neurologic lesion. BMS could be seen as neuropathy with variable central and peripheral contributions among individuals resulting in chronic pain.
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Affiliation(s)
- Amely Hartmann
- Private Practice Dr. Seiler und Kollegen, Echterdinger Str. 7, 70794, Filderstadt, Germany.
| | | | - Malte Bittner
- Private Practice Dr. Meschenmoser und Dr. Bittner, Stuttgart, Germany
| | - Roman Rolke
- Department of Palliative Medicine, University of Aachen, Aachen, Germany
| | - Claudia Welte-Jzyk
- Department of Oral Surgery, University Medical Centre of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Monika Daubländer
- Department of Oral Surgery, University Medical Centre of the Johannes Gutenberg University of Mainz, Mainz, Germany
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Otsuki T, Higuchi T, Yamazaki T, Okawa E, Okada K, Abe M. Efficacy and Safety of Pregabalin for the Treatment of Neuropathic Pain in Patients Undergoing Hemodialysis. Clin Drug Investig 2017; 37:95-102. [PMID: 27660209 DOI: 10.1007/s40261-016-0464-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
OBJECTIVE Pregabalin is a gamma aminobutyric acid derivative administered for neuropathic pain. It binds to α2δ subunits of voltage-dependent calcium channels, and inhibits calcium inflow of synapses and the release of excitatory neurotransmitters. This study investigated the efficacy and safety of pregabalin in patients with peripheral neuropathic pain undergoing maintenance hemodialysis. METHODS This study was a prospective, open-label, single-arm, multi-center trial. Patients were treated with an initial dose of pregabalin at 25 mg; this was then increased up to a maximum of 150 mg depending on the patient during a 12-week study period. Visual Analog Scale, Eight-Item Short Form Health Survey (SF-8), and laboratory data were collected at baseline and the end of the study. RESULTS A total of 45 patients with peripheral neuropathic pain were included, of whom 35 patients were analyzed. The final mean dose of pregabalin was 50.7 mg daily. Mean Visual Analog Scale scores significantly decreased from 52.4 mm at baseline to 34.1 mm at the end of the study (p < 0.0001). Scores for all eight categories of the SF-8 significantly increased compared with baseline (p < 0.05). Both physical and mental component summary scores of the SF-8 also significantly increased (p < 0.05). Ten patients were withdrawn from the study because of drowsiness, dizziness, and invalidity; however, no serious adverse drug reactions were recorded. CONCLUSIONS If adverse effects are carefully monitored and the administered dosage prudently determined, pregabalin can be an effective treatment for peripheral neuropathic pain in patients undergoing hemodialysis. TRIAL REGISTRATION UMIN000023117.
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Affiliation(s)
- Tomoyasu Otsuki
- Division of Nephrology, Hypertension and Endocrinology, Department of Internal Medicine, Nihon University School of Medicine, 30-1 Oyaguchi Kami-chou, Itabashi-ku, Tokyo, 173-8610, Japan
| | | | | | - Erina Okawa
- Department of Nephrology, Keiai Hospital, Tokyo, Japan
| | - Kazuyoshi Okada
- Division of Nephrology, Hypertension and Endocrinology, Department of Internal Medicine, Nihon University School of Medicine, 30-1 Oyaguchi Kami-chou, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Masanori Abe
- Division of Nephrology, Hypertension and Endocrinology, Department of Internal Medicine, Nihon University School of Medicine, 30-1 Oyaguchi Kami-chou, Itabashi-ku, Tokyo, 173-8610, Japan.
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Fardo F, Vinding MC, Allen M, Jensen TS, Finnerup NB. Delta and gamma oscillations in operculo-insular cortex underlie innocuous cold thermosensation. J Neurophysiol 2017; 117:1959-1968. [PMID: 28250150 PMCID: PMC5411475 DOI: 10.1152/jn.00843.2016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/07/2017] [Accepted: 02/07/2017] [Indexed: 01/21/2023] Open
Abstract
Using magnetoencephalography, we identified spatiotemporal features of central cold processing, with respect to the time course, oscillatory profile, and neural generators of cold-evoked responses in healthy human volunteers. Cold thermosensation was associated with low- and high-frequency oscillatory rhythms, both originating in operculo-insular regions. These results support further investigations of central cold processing using magnetoencephalography or EEG and the clinical utility of cold-evoked potentials for neurophysiological assessment of cold-related small-fiber function and damage. Cold-sensitive and nociceptive neural pathways interact to shape the quality and intensity of thermal and pain perception. Yet the central processing of cold thermosensation in the human brain has not been extensively studied. Here, we used magnetoencephalography and EEG in healthy volunteers to investigate the time course (evoked fields and potentials) and oscillatory activity associated with the perception of cold temperature changes. Nonnoxious cold stimuli consisting of Δ3°C and Δ5°C decrements from an adapting temperature of 35°C were delivered on the dorsum of the left hand via a contact thermode. Cold-evoked fields peaked at around 240 and 500 ms, at peak latencies similar to the N1 and P2 cold-evoked potentials. Importantly, cold-related changes in oscillatory power indicated that innocuous thermosensation is mediated by oscillatory activity in the range of delta (1–4 Hz) and gamma (55–90 Hz) rhythms, originating in operculo-insular cortical regions. We suggest that delta rhythms coordinate functional integration between operculo-insular and frontoparietal regions, while gamma rhythms reflect local sensory processing in operculo-insular areas. NEW & NOTEWORTHY Using magnetoencephalography, we identified spatiotemporal features of central cold processing, with respect to the time course, oscillatory profile, and neural generators of cold-evoked responses in healthy human volunteers. Cold thermosensation was associated with low- and high-frequency oscillatory rhythms, both originating in operculo-insular regions. These results support further investigations of central cold processing using magnetoencephalography or EEG and the clinical utility of cold-evoked potentials for neurophysiological assessment of cold-related small-fiber function and damage.
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Affiliation(s)
- Francesca Fardo
- Danish Pain Centre, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark; .,Interacting Minds Centre, Aarhus University, Aarhus, Denmark.,Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
| | - Mikkel C Vinding
- Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark.,Swedish National Facility for Magnetoencephalography, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Micah Allen
- Wellcome Trust Center for Neuroimaging, University College London, London, United Kingdom.,Institute of Cognitive Neuroscience, University College London, London, United Kingdom; and
| | - Troels Staehelin Jensen
- Danish Pain Centre, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Neurology, Aarhus University Hospital, Aarhus, Denmark
| | - Nanna Brix Finnerup
- Danish Pain Centre, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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Kazemi A, Rahmati M, Eslami R, Sheibani V. Activation of neurotrophins in lumbar dorsal root probably contributes to neuropathic pain after spinal nerve ligation. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2017; 20:29-35. [PMID: 28133521 PMCID: PMC5243971 DOI: 10.22038/ijbms.2017.8089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVES Neurotrophins (NTs) exert various effects on neuronal system. Growing evidence indicates that NTs are involved in the pathophysiology of neuropathic pain. However, the exact role of these proteins in modulating nociceptive signaling requires being defined. Thus, the aim of this study was to evaluate the effects of spinal nerve ligation (SNL) on NTs activation in the lumbar dorsal root. MATERIALS AND METHODS Ten male Wistar rats were randomly assigned to two groups: tight ligation of the L5 spinal nerve (SNL: n=5) and Sham (n=5). In order to produce neuropathic pain, the L5 spinal nerve was tightly ligated (SNL). Then, allodynia and hyperalgesia tests were conducted weekly. After 4 weeks, tissue samples were taken from the two groups for laboratory evaluations. Here, Real-Time PCR quantity method was used for measuring NTs gene expression levels. RESULTS SNL resulted in a significant weight loss in the soleus muscle (P<0.05), mechanical allodynia and thermal hyperalgesia thresholds (respectively, P<0.05; P<0.05). Also, NGF, NT-4, NT-3, TrkA, TrkB and TrkC expression were up-regulated following spinal nerve ligation group (respectively, P=0.025, P=0.013, P=0.001, P=0.002, P<0.001, P=001) (respectively, 4.7, 5.2, 7.5, 5.1, 7.2, 6.2 folds). CONCLUSION The present study provides new evidence that neuropathic pain induced by spinal nerve ligation probably activates NTs and Trk receptors expression in DRG. However, further studies are needed to better elucidate the role of NTs in a neuropathic pain.
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Affiliation(s)
- Abdolreza Kazemi
- Department of Physical Education and Sports Sciences, Faculty of Humanity and Literature, Vali E Asr University of Rafsanjan, Rafsanjan, Iran
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
- Corresponding author: Abdolreza Kazemi. Department of Physical Education and Sports Sciences, Faculty of Humanity and Literature, Vali E ASR University, Rafsanjan, Iran. Tel/Fax: +98-31-312335;
| | - Masoud Rahmati
- Departments of Physical Education and Sports Sciences, Lorestan University, Khoram Abad, Iran
| | - Rasoul Eslami
- Department of corrective exercise and Sports injury, Faculty of Physical Education and Sports Sciences, Allameh Tabataba’i University, Tehran, Iran
| | - Vahid Sheibani
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
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Patel N, Ali S, Yates J. Quality of life following injury to the inferior dental or lingual nerve - a cross-sectional mixed-methods study. ACTA ACUST UNITED AC 2016. [DOI: 10.1111/ors.12259] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- N. Patel
- Department of Oral Surgery; The University of Manchester; School of Dentistry; Manchester UK
| | - S. Ali
- Department of Special Care Dentistry; University Hospital Bristol; Bristol UK
| | - J.M. Yates
- Department of Oral and Maxillofacial Surgery; The University of Manchester; School of Dentistry; Manchester UK
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Minichino A, Delle Chiaie R, Cruccu G, Piroso S, Di Stefano G, Francesconi M, Bersani FS, Biondi M, Truini A. Pain-processing abnormalities in bipolar I disorder, bipolar II disorder, and schizophrenia: A novel trait marker for psychosis proneness and functional outcome? Bipolar Disord 2016; 18:591-601. [PMID: 27782355 DOI: 10.1111/bdi.12439] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 09/02/2016] [Indexed: 12/30/2022]
Abstract
OBJECTIVES Overlapping neural system dysfunctions, mainly involving the secondary somatosensory cortex (S2), the anterior cingulate cortex (ACC) and the anterior insular cortex (AIC), seem to be related to both pain-perception abnormalities and psychotic symptoms in schizophrenia (SCZ) and bipolar disorder (BD). Laser-evoked potentials (LEPs) were used to investigate pain-perception and central pain-processing abnormalities in SCZ, bipolar I disorder (BD-I), and bipolar II disorder (BD-II), and to evaluate their relationship with history of psychosis, and social-cognitive and functional impairments. METHODS Twenty patients with SCZ, 17 patients with BD-I, and 21 patients with BD-II who were all under similar pharmacological treatment underwent clinical, functional, and neuro-psychological assessment. LEPs were analyzed in patients and 19 healthy subjects (HS). LEPs elicit responses reflecting the activity of the S2 (N1 wave) and the ACC/AIC cortices (N2/P2 complex). A four-group ANOVA was conducted between patients and HS to compare pain-perceptive thresholds (PThs), N1, and N2/P2-LEP components. RESULTS Compared to HS: (i) patients with SCZ showed pain-processing and pain-perception abnormalities, as revealed by significantly higher PTh (P<.01), and lower N1 (P<.01) and N2/P2 (P<.01) amplitudes, (ii) patients with BD-I showed only pain-processing abnormalities, as revealed by significantly lower N1 (P<.05) and N2 (P<.01) amplitudes; and patients with BD-II did not differ for any of the LEP variables investigated. N1 and N2 amplitudes negatively correlated to history of psychosis (P<.01), social-cognition (P<.05), and real-world functioning (P<.01) measures in the whole group of patients. CONCLUSIONS To the best of our knowledge, this is the first study comparing central pain processing in patients with SCZ, BD-I, and BD-II. Our results suggest that pain-processing abnormalities may represent a novel locus of interest for research investigating trait markers of the psychosis spectrum.
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Affiliation(s)
- Amedeo Minichino
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy.,Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - Roberto Delle Chiaie
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Giorgio Cruccu
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Serena Piroso
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Giulia Di Stefano
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Marta Francesconi
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy.,Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | | | - Massimo Biondi
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Andrea Truini
- Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
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Isak B, Tankisi H, Johnsen B, Pugdahl K, Finnerup NB, Fuglsang-Frederiksen A. Laser and somatosensory evoked potentials in amyotrophic lateral sclerosis. Clin Neurophysiol 2016; 127:3322-8. [DOI: 10.1016/j.clinph.2016.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/11/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
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SIRT1 attenuates neuropathic pain by epigenetic regulation of mGluR1/5 expressions in type 2 diabetic rats. Pain 2016; 158:130-139. [DOI: 10.1097/j.pain.0000000000000739] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Abstract
Natural selection has shaped the physiological properties of sensory systems across species, yielding large variations in their sensitivity. Here, we used laser stimulation of skin nociceptors, a widely used technique to investigate pain in rats and humans, to provide a vivid example of how ignoring these variations can lead to serious misconceptions in sensory neuroscience. In 6 experiments, we characterized and compared the physiological properties of the electrocortical responses elicited by laser stimulation in rats and humans. We recorded the electroencephalogram from the surface of the brain in freely moving rats and from the scalp in healthy humans. Laser stimuli elicited 2 temporally distinct responses, traditionally interpreted as reflecting the concomitant activation of different populations of nociceptors with different conduction velocities: small-myelinated Aδ-fibres and unmyelinated C-fibres. Our results show that this interpretation is valid in humans, but not in rats. Indeed, the early response recorded in rats does not reflect the activation of the somatosensory system, but of the auditory system by laser-generated ultrasounds. These results have wide implications: retrospectively, as they prompt for a reconsideration of a large number of previous interpretations of electrocortical rat recordings in basic, preclinical, and pharmacological research, and prospectively, as they will allow recording truly pain-related cortical responses in rats.
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Abstract
Headache and depression were studied in patients who had undergone operation for acoustic neuroma. A questionnaire with headache and Beck Depression Inventory scale were sent to 228 patients, of whom 192 (84%) responded. Preoperative headache was reported by 61 (32%) of the respondents (47 migraine and nine tension-type headache) and 122 (64%) respondents had postoperative headache (15 new migraine and four new tension-type headache). The new postoperative headache was chronic (≥3 months) in 86% and continued at the time of the survey in 55% and presented typically as severe short-lasting attacks provoked by physical stress, bending or coughing. Non-steroidal anti-inflammatory drugs were effective in most cases. Depression (usually mild) occurred in 24% of the respondents, being significantly more common in prolonged postoperative headache patients. The operation doubled the prevalence of headache (from 32% to 64%). Headache after acoustic neuroma operation appears to be a specific subgroup of postcraniotomy headache.
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Affiliation(s)
- T Rimaaja
- Institute of Dentistry, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
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