1
|
Bagdas D, Paris JJ, Carper M, Wodarski R, Rice ASC, Knapp PE, Hauser KF, Damaj MI. Conditional expression of HIV-1 tat in the mouse alters the onset and progression of tonic, inflammatory and neuropathic hypersensitivity in a sex-dependent manner. Eur J Pain 2020; 24:1609-1623. [PMID: 32533878 DOI: 10.1002/ejp.1618] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 05/21/2020] [Accepted: 06/05/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND At least one-third of HIV-1-afflicted individuals experience peripheral neuropathy. Although the underlying mechanisms are not known, they may involve neurotoxic HIV-1 proteins. METHODS We assessed the influence of the neurotoxic HIV-1 regulatory protein, Tat, on inflammatory and neuropathic nociceptive behaviours using transgenic male and female mice that conditionally expressed (or did not express) HIV-1 Tat1-86 in fibrillary acidic protein-expressing glia in the central and peripheral nervous systems. RESULTS Tat induction significantly attenuated the time spent paw-licking following formalin injection (2.5%, i.pl.) in both male and female mice. However, significant sex differences were observed in the onset and magnitude of inflammation and sensory sensitivity following complete Freund's adjuvant (CFA) injection (10%, i.pl.) after Tat activation. Unlike female mice, male mice showed a significant attenuation of paw swelling and an absence of mechanical/thermal hypersensitivity in response to CFA after Tat induction. Male Tat(+) mice also showed accelerated recovery from chronic constrictive nerve injury (CCI)-induced neuropathic mechanical and thermal hypersensitivity compared to female Tat(+) mice. Morphine (3.2 mg/kg) fully reversed CCI-induced mechanical hypersensitivity in female Tat(-) mice, but not in Tat(+) females. CONCLUSIONS The ability of Tat to decrease oedema, paw swelling, and limit allodynia suggests a sequel of events in which Tat-induced functional deficits precede the onset of mechanical hypersensitivity. Moreover, HIV-1 Tat attenuated responses to inflammatory and neuropathic insults in a sex-dependent manner. HIV-1 Tat appears to directly contribute to HIV sensory neuropathy and reveals sex differences in HIV responsiveness and/or the underlying peripheral neuroinflammatory and nociceptive mechanisms.
Collapse
Affiliation(s)
- Deniz Bagdas
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,The Center for the Study for Tobacco Products, Virginia Commonwealth University, Richmond, VA, USA
| | - Jason J Paris
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS, USA.,Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Moriah Carper
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Rachel Wodarski
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, UK
| | - Andrew S C Rice
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, UK
| | - Pamela E Knapp
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,Department of Anatomy and Neurobiology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,Institute for Drug and Alcohol Studies, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Kurt F Hauser
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,Department of Anatomy and Neurobiology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,Institute for Drug and Alcohol Studies, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - M Imad Damaj
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.,The Center for the Study for Tobacco Products, Virginia Commonwealth University, Richmond, VA, USA.,Translational Research Initiative for Pain and Neuropathy at VCU, Virginia Commonwealth University, Richmond, VA, USA
| |
Collapse
|
2
|
Currie GL, Angel-Scott HN, Colvin L, Cramond F, Hair K, Khandoker L, Liao J, Macleod M, McCann SK, Morland R, Sherratt N, Stewart R, Tanriver-Ayder E, Thomas J, Wang Q, Wodarski R, Xiong R, Rice ASC, Sena ES. Animal models of chemotherapy-induced peripheral neuropathy: A machine-assisted systematic review and meta-analysis. PLoS Biol 2019; 17:e3000243. [PMID: 31107871 PMCID: PMC6544332 DOI: 10.1371/journal.pbio.3000243] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 05/31/2019] [Accepted: 04/08/2019] [Indexed: 12/25/2022] Open
Abstract
We report a systematic review and meta-analysis of research using animal models of chemotherapy-induced peripheral neuropathy (CIPN). We systematically searched 5 online databases in September 2012 and updated the search in November 2015 using machine learning and text mining to reduce the screening for inclusion workload and improve accuracy. For each comparison, we calculated a standardised mean difference (SMD) effect size, and then combined effects in a random-effects meta-analysis. We assessed the impact of study design factors and reporting of measures to reduce risks of bias. We present power analyses for the most frequently reported behavioural tests; 337 publications were included. Most studies (84%) used male animals only. The most frequently reported outcome measure was evoked limb withdrawal in response to mechanical monofilaments. There was modest reporting of measures to reduce risks of bias. The number of animals required to obtain 80% power with a significance level of 0.05 varied substantially across behavioural tests. In this comprehensive summary of the use of animal models of CIPN, we have identified areas in which the value of preclinical CIPN studies might be increased. Using both sexes of animals in the modelling of CIPN, ensuring that outcome measures align with those most relevant in the clinic, and the animal's pain contextualised ethology will likely improve external validity. Measures to reduce risk of bias should be employed to increase the internal validity of studies. Different outcome measures have different statistical power, and this can refine our approaches in the modelling of CIPN.
Collapse
Affiliation(s)
- Gillian L. Currie
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Helena N. Angel-Scott
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Lesley Colvin
- Department of Anaesthesia, Critical Care & Pain, University of Edinburgh, Edinburgh, United Kingdom
- Division of Population Health and Genomics, University of Dundee, Dundee, United Kingdom
| | - Fala Cramond
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Kaitlyn Hair
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Laila Khandoker
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Jing Liao
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Malcolm Macleod
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Sarah K. McCann
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Rosie Morland
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Nicki Sherratt
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Robert Stewart
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Ezgi Tanriver-Ayder
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - James Thomas
- EPPI-Centre, University College London, London, United Kingdom
| | - Qianying Wang
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Rachel Wodarski
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Ran Xiong
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Andrew S. C. Rice
- Pain Research, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Emily S. Sena
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| |
Collapse
|
3
|
Wodarski R, Bagdas D, Paris JJ, Pheby T, Toma W, Xu R, Damaj MI, Knapp PE, Rice AS, Hauser KF. Reduced intraepidermal nerve fibre density, glial activation, and sensory changes in HIV type-1 Tat-expressing female mice: involvement of Tat during early stages of HIV-associated painful sensory neuropathy. Pain Rep 2018; 3:e654. [PMID: 29922746 PMCID: PMC5999412 DOI: 10.1097/pr9.0000000000000654] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/19/2018] [Accepted: 03/17/2018] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION HIV infection is associated with chronic pain states, including sensory neuropathy, which affects greater than 40% of patients. OBJECTIVES AND METHODS To determine the impact of HIV-Tat induction on nociceptive behaviour in female mice conditionally expressing HIV Tat1-86 protein through a doxycycline (DOX)-driven glial fibrillary acidic protein promoter, intraepidermal nerve fibre density and immune cell activation in the dorsal root ganglion (DRG) and spinal cord were assessed by immunohistochemistry. Mice were assessed for mechanical and thermal sensitivity for 9 weeks using von-Frey and Hargreaves tests. RESULTS Intraepidermal nerve fibre density was significantly reduced after 6 weeks of Tat induction, similar to sensory neuropathy seen in clinical HIV infection. Tat induction through DOX caused a significant reduction in paw withdrawal thresholds in a time-dependent manner starting the 4th week after Tat induction. No changes in paw withdrawal latencies were seen in Tat(-) control mice lacking the tat transgene. Although reductions in paw withdrawal thresholds increased throughout the study, no significant change in spontaneous motor activity was observed. Spinal cord (cervical and lumbar), DRG, and hind paw skin were collected at 8 days and 6 weeks after Tat induction. HIV-Tat mRNA expression was significantly increased in lumbar DRG and skin samples 8 days after DOX treatment. Tat induced a significant increase in the number of Iba-1 positive cells at 6 weeks, but not after 8 days, of exposure. No differences in glial fibrillary acidic protein immunoreactivity were observed. CONCLUSION These results suggest that Tat protein contributes to painful HIV-related sensory neuropathy during the initial stages of the pathogenesis.
Collapse
Affiliation(s)
- Rachel Wodarski
- Pain Research Group, Department of Surgery and Cancer, Imperial College, Chelsea and Westminster Hospital Campus, London, United Kingdom
| | - Deniz Bagdas
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Jason J. Paris
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
- Department of BioMolecular Sciences, University of Mississippi, University, MS, USA
| | - Tim Pheby
- Pain Research Group, Department of Surgery and Cancer, Imperial College, Chelsea and Westminster Hospital Campus, London, United Kingdom
| | - Wisam Toma
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Ruqiang Xu
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA, USA
- School of Life Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - M. Imad Damaj
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Pamela E. Knapp
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA, USA
| | - Andrew S.C. Rice
- Pain Research Group, Department of Surgery and Cancer, Imperial College, Chelsea and Westminster Hospital Campus, London, United Kingdom
| | - Kurt F. Hauser
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA, USA
| |
Collapse
|
4
|
Wodarski R, Delaney A, Ultenius C, Morland R, Andrews N, Baastrup C, Bryden LA, Caspani O, Christoph T, Gardiner NJ, Huang W, Kennedy JD, Koyama S, Li D, Ligocki M, Lindsten A, Machin I, Pekcec A, Robens A, Rotariu SM, Voß S, Segerdahl M, Stenfors C, Svensson CI, Treede RD, Uto K, Yamamoto K, Rutten K, Rice AS. Cross-centre replication of suppressed burrowing behaviour as an ethologically relevant pain outcome measure in the rat: a prospective multicentre study. Pain 2016; 157:2350-65. [PMID: 27643836 PMCID: PMC5028161 DOI: 10.1097/j.pain.0000000000000657] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 05/19/2016] [Accepted: 05/20/2016] [Indexed: 12/11/2022]
Abstract
Burrowing, an ethologically relevant rodent behaviour, has been proposed as a novel outcome measure to assess the global impact of pain in rats. In a prospective multicentre study using male rats (Wistar, Sprague-Dawley), replication of suppressed burrowing behaviour in the complete Freund adjuvant (CFA)-induced model of inflammatory pain (unilateral, 1 mg/mL in 100 µL) was evaluated in 11 studies across 8 centres. Following a standard protocol, data from participating centres were collected centrally and analysed with a restricted maximum likelihood-based mixed model for repeated measures. The total population (TP-all animals allocated to treatment; n = 249) and a selected population (SP-TP animals burrowing over 500 g at baseline; n = 200) were analysed separately, assessing the effect of excluding "poor" burrowers. Mean baseline burrowing across studies was 1113 g (95% confidence interval: 1041-1185 g) for TP and 1329 g (1271-1387 g) for SP. Burrowing was significantly suppressed in the majority of studies 24 hours (7 studies/population) and 48 hours (7 TP, 6 SP) after CFA injections. Across all centres, significantly suppressed burrowing peaked 24 hours after CFA injections, with a burrowing deficit of -374 g (-479 to -269 g) for TP and -498 g (-609 to -386 g) for SP. This unique multicentre approach first provided high-quality evidence evaluating suppressed burrowing as robust and reproducible, supporting its use as tool to infer the global effect of pain on rodents. Second, our approach provided important informative value for the use of multicentre studies in the future.
Collapse
Affiliation(s)
- Rachel Wodarski
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, United Kingdom
- Eli Lilly and Company, Erl Wood Manor, Windlesham, United Kingdom
| | - Ada Delaney
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Camilla Ultenius
- Neuroscience CNSP iMED, AstraZeneca R&D Södertälje, Södertälje, Sweden
| | - Rosie Morland
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, United Kingdom
| | - Nick Andrews
- Department of Neurobiology, Boston Children's Hospital, MA, USA
| | - Catherine Baastrup
- Danish Pain Research Center, Aarhus University Hospital, Aarhus, Denmark
| | - Luke A. Bryden
- CNS Disease Division Research Germany, Boehringer Ingelheim Pharma GmbH and Co KG, Biberach an der Riss, Germany
| | - Ombretta Caspani
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Heidelberg University, Mannheim, Germany
| | - Thomas Christoph
- Department of Pharmacology and Biomarker Development, Translational Science and Strategy, Grünenthal GmbH, Aachen, Germany
| | - Natalie J. Gardiner
- Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
| | - Wenlong Huang
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, United Kingdom
| | | | - Suguru Koyama
- Laboratory for Pharmacology, Pharmaceutical Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan
| | - Dominic Li
- Eli Lilly and Company, Indianapolis, IN, USA
| | - Marcin Ligocki
- Eli Lilly and Company, Erl Wood Manor, Windlesham, United Kingdom
| | | | - Ian Machin
- Deal, Kent, United Kingdom. L. A. Bryden is now with the Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom. W. Huang is now with the Institute of Medical Sciences, University of Aberdeen, United Kingdom. C. Stenfors is now with the R&D CNS Research, Orion Corporation, Orion Pharma, Espoo, Finland
| | - Anton Pekcec
- CNS Disease Division Research Germany, Boehringer Ingelheim Pharma GmbH and Co KG, Biberach an der Riss, Germany
| | - Angela Robens
- Department of Pharmacology and Biomarker Development, Translational Science and Strategy, Grünenthal GmbH, Aachen, Germany
| | - Sanziana M. Rotariu
- Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
| | - Sabrina Voß
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Heidelberg University, Mannheim, Germany
| | - Marta Segerdahl
- Neuroscience CNSP iMED, AstraZeneca R&D Södertälje, Södertälje, Sweden
- H. Lundbeck A/S, Valby, Denmark
| | - Carina Stenfors
- Neuroscience CNSP iMED, AstraZeneca R&D Södertälje, Södertälje, Sweden
| | - Camilla I. Svensson
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Rolf-Detlef Treede
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Heidelberg University, Mannheim, Germany
| | - Katsuhiro Uto
- Laboratory for Pharmacology, Pharmaceutical Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan
| | - Kazumi Yamamoto
- Laboratory for Pharmacology, Pharmaceutical Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan
| | - Kris Rutten
- Department of Pharmacology and Biomarker Development, Translational Science and Strategy, Grünenthal GmbH, Aachen, Germany
| | - Andrew S.C. Rice
- Pain Research Group, Department of Surgery and Cancer, Imperial College, London, United Kingdom
| |
Collapse
|
5
|
Morland RH, Novejarque A, Huang W, Wodarski R, Denk F, Dawes JD, Pheby T, McMahon SB, Rice AS. Short-term effect of acute and repeated urinary bladder inflammation on thigmotactic behaviour in the laboratory rat. F1000Res 2015; 4:109. [PMID: 27158443 PMCID: PMC4850861 DOI: 10.12688/f1000research.6255.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 12/13/2022] Open
Abstract
Understanding the non-sensory components of the pain experience is crucial to developing effective treatments for pain conditions. Chronic pain is associated with increased incidence of anxio-depressive disorders, and patients often report feelings of vulnerability which can decrease quality of life. In animal models of pain, observation of behaviours such as thigmotaxis can be used to detect such affective disturbances by exploiting the influence of nociceptive stimuli on the innate behavioural conflict between exploration of a novel space and predator avoidance behaviour. This study investigates whether acute and repeated bladder inflammation in adult female Wistar rats increases thigmotactic behaviour in the open field paradigm, and aims to determine whether this correlates with activation in the central amygdala, as measured by c-Fos immunoreactivity. Additionally, up-regulation of inflammatory mediators in the urinary bladder was measured using RT-qPCR array featuring 92 transcripts to examine how local mediators change under experimental conditions. We found acute but not repeated turpentine inflammation of the bladder increased thigmotactic behaviour (decreased frequency of entry to the inner zone) in the open field paradigm, a result that was also observed in the catheter-only instrumentation group. Decreases in locomotor activity were also observed in both models in turpentine and instrumentation groups. No differences were observed in c-Fos activation, although a general increased in activation along the rostro-caudal axis was seen. Inflammatory mediator up-regulation was greatest following acute inflammation, with CCL12, CCL7, and IL-1β significantly up-regulated in both conditions when compared to naïve tissue. These results suggest that acute catheterisation, with or without turpentine inflammation, induces affective alterations detectable in the open field paradigm accompanied by up-regulation of multiple inflammatory mediators.
Collapse
Affiliation(s)
- Rosemary H Morland
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| | - Amparo Novejarque
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| | - Wenlong Huang
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| | - Rachel Wodarski
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| | - Franziska Denk
- Wolfson Centre for Age Related Disease, King's College London, London, UK
| | - John D Dawes
- The Nuffield Department of Clinical Neurosciences, Medical Sciences Division, University of Oxford, Oxford, UK
| | - Tim Pheby
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| | - Stephen B McMahon
- Wolfson Centre for Age Related Disease, King's College London, London, UK
| | - Andrew Sc Rice
- Pain Research Group, Department of Surgery and Cancer, Faculty of Medicine, Imperial College , London, UK
| |
Collapse
|
6
|
Wodarski R, Schuh-Hofer S, Yurek DA, Wafford KA, Gilmour G, Treede RD, Kennedy JD. Development and pharmacological characterization of a model of sleep disruption-induced hypersensitivity in the rat. Eur J Pain 2014; 19:554-66. [PMID: 25195796 DOI: 10.1002/ejp.580] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2014] [Indexed: 12/24/2022]
Abstract
BACKGROUND Sleep disturbance is a commonly reported co-morbidity in chronic pain patients, and conversely, disruption of sleep can cause acute and long-lasting hypersensitivity to painful stimuli. The underlying mechanisms of sleep disruption-induced pain hypersensitivity are poorly understood. Confounding factors of previous studies have been the sleep disruption protocols, such as the 'pedestal over water' or 'inverted flower pot' methods, that can cause large stress responses and therefore may significantly affect pain outcome measures. METHODS Sleep disruption was induced by placing rats for 8 h in a slowly rotating cylindrical cage causing arousal via the righting reflex. Mechanical (Von Frey filaments) and thermal (Hargreaves) nociceptive thresholds were assessed, and plasma corticosterone levels were measured (mass spectroscopy). Sleep disruption-induced hypersensitivity was pharmacologically characterized with drugs relevant for pain treatment, including gabapentin (30 mg/kg and 50 mg/kg), Ica-6p (Kv7.2/7.3 potassium channel opener; 10 mg/kg), ibuprofen (30 mg/kg and 100 mg/kg) and amitriptyline (10 mg/kg). RESULTS Eight hours of sleep disruption caused robust mechanical and heat hypersensitivity in the absence of a measurable change in plasma corticosterone levels. Gabapentin had no effect on reduced nociceptive thresholds. Ibuprofen attenuated mechanical thresholds, while Ica-6p and amitriptyline attenuated only reduced thermal nociceptive thresholds. CONCLUSIONS These results show that acute and low-stress sleep disruption causes mechanical and heat hypersensitivity in rats. Mechanical and heat hypersensitivity exhibited differential sensitivity to pharmacological agents, thus suggesting dissociable mechanisms for those two modalities. Ultimately, this model could help identify underlying mechanisms linking sleep disruption and hypersensitivity.
Collapse
Affiliation(s)
- R Wodarski
- Eli Lilly & Company, Neuroscience Discovery, Erl Wood Manor, Windlesham, UK
| | | | | | | | | | | | | |
Collapse
|
7
|
Schuh-Hofer S, Wodarski R, Pfau DB, Caspani O, Magerl W, Kennedy JD, Treede RD. One night of total sleep deprivation promotes a state of generalized hyperalgesia: a surrogate pain model to study the relationship of insomnia and pain. Pain 2013; 154:1613-1621. [PMID: 23707287 DOI: 10.1016/j.pain.2013.04.046] [Citation(s) in RCA: 179] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Revised: 04/03/2013] [Accepted: 04/19/2013] [Indexed: 12/25/2022]
Abstract
Sleep disturbances are highly prevalent in chronic pain patients. Understanding their relationship has become an important research topic since poor sleep and pain are assumed to closely interact. To date, human experimental studies exploring the impact of sleep disruption/deprivation on pain perception have yielded conflicting results. This inconsistency may be due to the large heterogeneity of study populations and study protocols previously used. In addition, none of the previous studies investigated the entire spectrum of nociceptive modalities. To address these shortcomings, a standardized comprehensive quantitative sensory protocol was used in order to compare the somatosensory profile of 14 healthy subjects (6 female, 8 male, 23.5 ± 4.1 year; mean ± SD) after a night of total sleep deprivation (TSD) and a night of habitual sleep in a cross-over design. One night of TSD significantly increased the level of sleepiness (P<0.001) and resulted in higher scores of the State Anxiety Inventory (P<0.01). In addition to previously reported hyperalgesia to heat (P<0.05) and blunt pressure (P<0.05), study participants developed hyperalgesia to cold (P<0.01) and increased mechanical pain sensitivity to pinprick stimuli (P<0.05) but no changes in temporal summation. Paradoxical heat sensations or dynamic mechanical allodynia were absent. TSD selectively modulated nociception, since detection thresholds of non-nociceptive modalities remained unchanged. Our findings show that a single night of TSD is able to induce generalized hyperalgesia and to increase State Anxiety scores. In the future, TSD may serve as a translational pain model to elucidate the pathomechanisms underlying the hyperalgesic effect of sleep disturbances.
Collapse
Affiliation(s)
- Sigrid Schuh-Hofer
- Institute of Neurophysiology, Centre of Biomedicine and Medical Technology Mannheim, Heidelberg University, 68167 Mannheim, Germany Zentrum für Neurologie, Abteilung Epileptologie, Universitätsklinikum Tübingen der Eberhard Karls Universität, Germany Eli Lilly & Company, Erl Wood Manor, Windlesham, Surrey GU2 06PH, UK Eli Lilly & Company, Indianapolis, IN, USA
| | | | | | | | | | | | | |
Collapse
|
8
|
Clark AK, Wodarski R, Guida F, Sasso O, Malcangio M. Cathepsin S release from primary cultured microglia is regulated by the P2X7 receptor. Glia 2010; 58:1710-26. [DOI: 10.1002/glia.21042] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
Staniland AA, Clark AK, Wodarski R, Sasso O, Maione F, D'Acquisto F, Malcangio M. Reduced inflammatory and neuropathic pain and decreased spinal microglial response in fractalkine receptor (CX3CR1) knockout mice. J Neurochem 2010; 114:1143-57. [PMID: 20524966 DOI: 10.1111/j.1471-4159.2010.06837.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The chemokine fractalkine (FKN) is a critical mediator of spinal neuronal-microglial communication in chronic pain. Mature FKN is enzymatically cleaved from neuronal membranes and activation of its receptor, CX3CR1, which is expressed by microglia, induces phosphorylation of p38 MAPK. We used CX3CR1 knockout (KO) mice to examine pain behaviour in the absence of FKN signalling. Naive CX3CR1 KO mice had normal responses to acute noxious stimuli. However, KO mice showed deficits in inflammatory and neuropathic nociceptive responses. After intraplantar zymosan, KO mice did not display thermal hyperalgesia, whereas mechanical allodynia developed fully. In the partial sciatic nerve ligation model of neuropathic pain, both mechanical allodynia and thermal hyperalgesia were less severe in KO mice than in wild-types (WT). Dorsal horn Iba1 immunostaining and phosphorylation of p38 MAPK increased after injury in WT controls but not in KO animals. In WT mice, inflammation and nerve injury increased spinal cord CX3CR1 and FKN expression. FKN protein was also increased in KO mice following inflammation but not after neuropathy, suggesting the FKN/CX3CR1 system is differently affected in the two pain models. Loss of FKN/CX3CR1 neuroimmune communication attenuates hyperalgesia and allodynia in a modality-dependent fashion highlighting the complex nature of microglial response in pathological pain models.
Collapse
Affiliation(s)
- Amelia A Staniland
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | | | | | | | | | | | | |
Collapse
|
10
|
Luebbert M, Radtke D, Wodarski R, Damann N, Hatt H, Wetzel CH. Direct activation of transient receptor potential V1 by nickel ions. Pflugers Arch 2010; 459:737-50. [PMID: 20101408 DOI: 10.1007/s00424-009-0782-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2009] [Revised: 12/22/2009] [Accepted: 12/25/2009] [Indexed: 11/29/2022]
Abstract
TRPV1 is a member of the transient receptor potential (TRP) family of cation channels. It is expressed in sensory neurons of the dorsal root and trigeminal ganglia as well as in a wide range of non-neuronal tissues. The channel proteins serve as polymodal receptors for various potentially harmful stimuli to prevent tissue damage by mediating unpleasant or painful sensations. Using Ca imaging and voltage-clamp recordings, we found that low millimolar doses of Ni2+ (NiSO4) are able to induce non-specific cation currents in a capsaicin-sensitive population of cultured mouse trigeminal ganglion neurons. In addition, we show that NiSO4 elicits intracellular Ca2+ transients and membrane currents in HEK293 and CHO cells heterologously expressing rat TRPV1. The use of voltage ramps from -100 to +100 mV revealed a strong outward rectification of these currents. Application of NiSO4 to the cytoplasmic face of inside-out membrane patches did not induce any currents. However, delivering NiSO4 to the extracellular face during outside-out recordings, we observed a significant increase in open probability paralleled by a decrease in channel conductance. When combined with other TRPV1 agonists, NiSO4 produces a bimodal effect on TRPV1 activity, depending on the strength and concentration of the second stimulus. Outwardly directed currents induced by low doses of capsaicin and nearly neutral pH values ( approximately pH = 7.0-6.5) were augmented by low doses of NiSO4. In contrast, responses to stronger stimuli were reduced by NiSO4. Moreover, we were able to identify amino acids involved in the effect of NiSO4 on TRPV1.
Collapse
Affiliation(s)
- Matthias Luebbert
- Lehrstuhl für Zellphysiologie, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum, Germany
| | | | | | | | | | | |
Collapse
|
11
|
Keeble JE, Bodkin JV, Liang L, Wodarski R, Davies M, Fernandes ES, Coelho CDF, Russell F, Graepel R, Muscara MN, Malcangio M, Brain SD. Hydrogen peroxide is a novel mediator of inflammatory hyperalgesia, acting via transient receptor potential vanilloid 1-dependent and independent mechanisms. Pain 2008; 141:135-42. [PMID: 19059721 DOI: 10.1016/j.pain.2008.10.025] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Revised: 10/24/2008] [Accepted: 10/29/2008] [Indexed: 11/18/2022]
Abstract
Inflammatory diseases associated with pain are often difficult to treat in the clinic due to insufficient understanding of the nociceptive pathways involved. Recently, there has been considerable interest in the role of reactive oxygen species (ROS) in inflammatory disease, but little is known of the role of hydrogen peroxide (H(2)O(2)) in hyperalgesia. In the present study, intraplantar injection of H(2)O(2)-induced a significant dose- and time-dependent mechanical and thermal hyperalgesia in the mouse hind paw, with increased c-fos activity observed in the dorsal horn of the spinal cord. H(2)O(2) also induced significant nociceptive behavior such as increased paw licking and decreased body liftings. H(2)O(2) levels were significantly raised in the carrageenan-induced hind paw inflammation model, showing that this ROS is produced endogenously in a model of inflammation. Moreover, superoxide dismutase and catalase significantly reduced carrageenan-induced mechanical and thermal hyperalgesia, providing evidence of a functionally significant endogenous role. Thermal, but not mechanical, hyperalgesia in response to H(2)O(2) (i.pl.) was longer lasting in TRPV1 wild type mice compared to TRPV1 knockouts. It is unlikely that downstream lipid peroxidation was increased by H(2)O(2). In conclusion, we demonstrate a notable effect of H(2)O(2) in mediating inflammatory hyperalgesia, thus highlighting H(2)O(2) removal as a novel therapeutic target for anti-hyperalgesic drugs in the clinic.
Collapse
Affiliation(s)
- Julie Elizabeth Keeble
- Pharmaceutical Science Research Division, Franklin-Wilkins Building, King's College London, Waterloo Campus, 150 Stamford Street, London SE1 9NH, UK.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|