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Shih YT, Cheng KC, Ko YJ, Lin CY, Wang MC, Lee CI, Lee PL, Qi R, Chiu JJ, Hsu SH. 3D-Printed proangiogenic patches of photo-crosslinked gelatin and polyurethane hydrogels laden with vascular cells for treating vascular ischemic diseases. Biomaterials 2024; 309:122600. [PMID: 38718614 DOI: 10.1016/j.biomaterials.2024.122600] [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: 09/05/2023] [Revised: 04/19/2024] [Accepted: 04/29/2024] [Indexed: 06/03/2024]
Abstract
Engineering vascularized tissues remains a promising approach for treating ischemic cardiovascular diseases. The availability of 3D-bioprinted vascular grafts that induce therapeutic angiogenesis can help avoid necrosis and excision of ischemic tissues. Here, using a combination of living cells and biodegradable hydrogels, we fabricated 3D-printed biocompatible proangiogenic patches from endothelial cell-laden photo-crosslinked gelatin (EC-PCG) bioink and smooth muscle cell-encapsulated polyurethane (SMC-PU) bioink. Implantation of 3D-bioprinted proangiogenic patches in a mouse model showed that EC-PCG served as an angiogenic capillary bed, whereas patterned SMC-PU increased the density of microvessels. Moreover, the assembled patterns between EC-PCG and SMC-PU induced the geometrically guided generation of microvessels with blood perfusion. In a rodent model of hindlimb ischemia, the vascular patches rescued blood flow to distal tissues, prevented toe/foot necrosis, promoted muscle remodeling, and increased the capillary density, thereby improving the heat-escape behavior of ischemic animals. Thus, our 3D-printed vascular cell-laden bioinks constitute efficient and scalable biomaterials that facilitate the engineering of vascular patches capable of directing therapeutic angiogenesis for treating ischemic vascular diseases.
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Affiliation(s)
- Yu-Tsung Shih
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Kun-Chih Cheng
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Yi-Ju Ko
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan
| | - Chia-Yu Lin
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan
| | - Mei-Cun Wang
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan
| | - Chih-I Lee
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan
| | - Pei-Ling Lee
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan
| | - Rong Qi
- Department of Pharmacology, School of Basic Medical Sciences, Peking University Health Science Center, State Key Laboratory of Vascular Homeostasis and Remodeling, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China.
| | - Jeng-Jiann Chiu
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan; College of Medical Science and Technology, Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan; Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan.
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan; Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, Taiwan.
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Dayton JR, Marquez J, Romo AK, Chen YJ, Contreras JE, Griffith TN. Thermal escape box: A cost-benefit evaluation paradigm for investigating thermosensation and thermal pain. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2024; 15:100155. [PMID: 38617105 PMCID: PMC11015515 DOI: 10.1016/j.ynpai.2024.100155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/16/2024]
Abstract
Thermosensation, the ability to detect and estimate temperature, is an evolutionarily conserved process that is essential for survival. Thermosensing is impaired in various pain syndromes, resulting in thermal allodynia, the perception of an innocuous temperature as painful, or thermal hyperalgesia, an exacerbated perception of a painful thermal stimulus. Several behavioral assays exist to study thermosensation and thermal pain in rodents, however, most rely on reflexive withdrawal responses or the subjective quantification of spontaneous nocifensive behaviors. Here, we created a new apparatus, the thermal escape box, which can be attached to temperature-controlled plates and used to assess temperature-dependent effort-based decision-making. The apparatus consists of a light chamber with an opening that fits around temperature-controlled plates, and a small entryway into a dark chamber. A mouse must choose to stay in a brightly lit aversive area or traverse the plates to escape to the enclosed dark chamber. We quantified escape latencies of adult C57Bl/6 mice at different plate temperatures from video recordings and found they were significantly longer at 5 °C, 18 °C, and 52 °C, compared to 30 °C, a mouse's preferred ambient temperature. Differences in escape latencies were abolished in male Trpm8-/- mice and in male Trpv1-/- animals. Finally, we show that chronic constriction injury procedures or oxaliplatin treatement significantly increased escape latencies at cold temperatures compared to controls, the later of which was prevented by the analgesic meloxicam. This demonstrates the utility of this assay in detecting cold pain. Collectively, our study has identified a new and effective tool that uses cost-benefit valuations to study thermosensation and thermal pain.
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Affiliation(s)
- Jacquelyn R. Dayton
- University of California, Davis. Department of Physiology & Membrane Biology, 1275 Med Science Drive, Davis, CA 95616, United States
| | - Jose Marquez
- University of California, Davis. Department of Physiology & Membrane Biology, 1275 Med Science Drive, Davis, CA 95616, United States
| | - Alejandra K. Romo
- University of California, Davis. Department of Physiology & Membrane Biology, 1275 Med Science Drive, Davis, CA 95616, United States
| | - Yi-Je Chen
- University of California, Davis. Department of Pharmacology, 1275 Med Science Drive, Davis, CA 95616, United States
| | - Jorge E. Contreras
- University of California, Davis. Department of Physiology & Membrane Biology, 1275 Med Science Drive, Davis, CA 95616, United States
| | - Theanne N. Griffith
- University of California, Davis. Department of Physiology & Membrane Biology, 1275 Med Science Drive, Davis, CA 95616, United States
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Gao H, Liu Y, Shi Z, Zhang H, Wang M, Chen H, Li Y, Ji S, Xiang J, Pi W, Zhou L, Hong Y, Wu L, Cai A, Fu X, Sun X. A volar skin excisional wound model for in situ evaluation of multiple-appendage regeneration and innervation. BURNS & TRAUMA 2023; 11:tkad027. [PMID: 37397511 PMCID: PMC10309083 DOI: 10.1093/burnst/tkad027] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/21/2023] [Accepted: 04/24/2023] [Indexed: 07/04/2023]
Abstract
Background Promoting rapid wound healing with functional recovery of all skin appendages is the main goal of regenerative medicine. So far current methodologies, including the commonly used back excisional wound model (BEWM) and paw skin scald wound model, are focused on assessing the regeneration of either hair follicles (HFs) or sweat glands (SwGs). How to achieve de novo appendage regeneration by synchronized evaluation of HFs, SwGs and sebaceous glands (SeGs) is still challenging. Here, we developed a volar skin excisional wound model (VEWM) that is suitable for examining cutaneous wound healing with multiple-appendage restoration, as well as innervation, providing a new research paradigm for the perfect regeneration of skin wounds. Methods Macroscopic observation, iodine-starch test, morphological staining and qRT-PCR analysis were used to detect the existence of HFs, SwGs, SeGs and distribution of nerve fibres in the volar skin. Wound healing process monitoring, HE/Masson staining, fractal analysis and behavioral response assessment were performed to verify that VEWM could mimic the pathological process and outcomes of human scar formation and sensory function impairment. Results HFs are limited to the inter-footpads. SwGs are densely distributed in the footpads, scattered in the IFPs. The volar skin is richly innervated. The wound area of the VEWM at 1, 3, 7 and 10 days after the operation is respectively 89.17% ± 2.52%, 71.72% ± 3.79%, 55.09 % ± 4.94% and 35.74% ± 4.05%, and the final scar area accounts for 47.80% ± 6.22% of the initial wound. While the wound area of BEWM at 1, 3, 7 and 10 days after the operation are respectively 61.94% ± 5.34%, 51.26% ± 4.89%, 12.63% ± 2.86% and 6.14% ± 2.84%, and the final scar area accounts for 4.33% ± 2.67% of the initial wound. Fractal analysis of the post-traumatic repair site for VEWM vs human was performed: lacunarity values, 0.040 ± 0.012 vs 0.038 ± 0.014; fractal dimension values, 1.870 ± 0.237 vs 1.903 ± 0.163. Sensory nerve function of normal skin vs post-traumatic repair site was assessed: mechanical threshold, 1.05 ± 0.52 vs 4.90 g ± 0.80; response rate to pinprick, 100% vs 71.67% ± 19.92%, and temperature threshold, 50.34°C ± 3.11°C vs 52.13°C ± 3.54°C. Conclusions VEWM closely reflects the pathological features of human wound healing and can be applied for skin multiple-appendages regeneration and innervation evaluation.
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Affiliation(s)
| | | | | | - Hongliang Zhang
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Mengyang Wang
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Huating Chen
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Yan Li
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Shaifei Ji
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Jiangbing Xiang
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Wei Pi
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Laixian Zhou
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Yiyue Hong
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Lu Wu
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4 Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration; Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing 100048, P. R. China
| | - Aizhen Cai
- Correspondence. Sun Xiaoyan, ; Xiaobing Fu, ; Aizhen Cai,
| | - Xiaobing Fu
- Correspondence. Sun Xiaoyan, ; Xiaobing Fu, ; Aizhen Cai,
| | - Xiaoyan Sun
- Correspondence. Sun Xiaoyan, ; Xiaobing Fu, ; Aizhen Cai,
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Modi AD, Parekh A, Pancholi YN. Evaluating Pain Behaviours: Widely Used Mechanical and Thermal Methods in Rodents. Behav Brain Res 2023; 446:114417. [PMID: 37003494 DOI: 10.1016/j.bbr.2023.114417] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/13/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
Globally, over 300 million surgical procedures are performed annually, with pain being one of the most common post-operative side effects. During the onset of injury, acute pain plays a protective role in alerting the individual to remove noxious stimuli, while long-lasting chronic pain without any physiological reason is detrimental to the recovery process. Hence, it created an urgent need to better understand the pain mechanism and explore therapeutic targets. Despite the hardship in performing human pain studies due to ethical considerations, clinically relevant rodent pain models provide an excellent opportunity to perform pain studies. Several neurobehavioural tests are used to assess the drug efficacy in rodents to determine avoidance behaviour latency and threshold. This review article provides a methodological overview of mechanical (i.e. von Frey, Mechanical Conflict System) and thermal (i.e. Hargreaves Assay, Hot and Cold Plate, Temperature Place Preference) tests to assess pain in clinically relevant pain rodent models. We further discussed the current modifications of those tests along with their use in literature, the impact of confounding variables, advantages and disadvantages.
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Affiliation(s)
- Akshat D Modi
- Department of Biological Sciences, University of Toronto, Scarborough, Ontario M1C 1A4, Canada; Department of Genetics and Development, Krembil Research Institute, Toronto, Ontario M5T 0S8, Canada.
| | - Anavi Parekh
- Department of Neuroscience, University of Toronto, Toronto, Ontario M5S 1A1, Canada
| | - Yajan N Pancholi
- Department of Neuroscience, University of Toronto, Scarborough, Ontario M1C 1A4, Canada
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5
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Nunez-Badinez P, Laux-Biehlmann A, Hayward MD, Buiakova O, Zollner TM, Nagel J. Anxiety-related behaviors without observation of generalized pain in a mouse model of endometriosis. Front Behav Neurosci 2023; 17:1118598. [PMID: 36844654 PMCID: PMC9947402 DOI: 10.3389/fnbeh.2023.1118598] [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: 12/07/2022] [Accepted: 01/23/2023] [Indexed: 02/11/2023] Open
Abstract
Endometriosis is a chronic, hormone-dependent, inflammatory disease, characterized by the presence and growth of endometrial tissue outside the uterine cavity. It is associated with moderate to severe pelvic and abdominal pain symptoms, subfertility and a marked reduction in health-related quality of life. Furthermore, relevant co-morbidities with affective disorders like depression or anxiety have been described. These conditions have a worsening effect on pain perception in patients and might explain the negative impact on quality of life observed in those suffering from endometriosis-associated pain. Whereas several studies using rodent models of endometriosis focused on biological and histopathological similarities with the human situation, the behavioral characterization of these models was never performed. This study investigated the anxiety-related behaviors in a syngeneic model of endometriosis. Using elevated plus maze and the novel environment induced feeding suppression assays we observed the presence of anxiety-related behaviors in endometriosis-induced mice. In contrast, locomotion or generalized pain did not differ between groups. These results indicate that the presence of endometriosis lesions in the abdominal cavity could, similarly to patients, induce profound psychopathological changes/impairments in mice. These readouts might provide additional tools for preclinical identification of mechanisms relevant for development of endometriosis-related symptoms.
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Affiliation(s)
- Paulina Nunez-Badinez
- Exploratory Pathobiology, Research and Early Development, Research and Development, Bayer AG, Wuppertal, Germany
| | - Alexis Laux-Biehlmann
- Exploratory Pathobiology, Research and Early Development, Research and Development, Bayer AG, Wuppertal, Germany
| | | | | | - Thomas M. Zollner
- Endocrinology, Metabolism and Reproductive Health, Research and Early Development, Research and Development, Bayer AG, Berlin, Germany,*Correspondence: Thomas M. Zollner,
| | - Jens Nagel
- Exploratory Pathobiology, Research and Early Development, Research and Development, Bayer AG, Wuppertal, Germany
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Manning CE, Fritz M, Kauer JA. Function of Excitatory Periaqueductal Gray Synapses in the Ventral Tegmental Area following Inflammatory Injury. eNeuro 2022; 9:ENEURO.0324-22.2022. [PMID: 36635253 PMCID: PMC9797208 DOI: 10.1523/eneuro.0324-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 10/26/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Manipulating the activity of ventral tegmental area (VTA) dopamine (DA) neurons can drive nocifensive reflexes, and their firing rates are reduced following noxious stimuli. However, the pain-relevant inputs to the VTA remain incompletely understood. In this study, we used male and female mice in combination with identified dopamine and GABA neurons in the VTA that receive excitatory inputs from the periaqueductal gray (PAG), a nexus of ascending pain information. We tested whether PAG-VTA synapses undergo functional plasticity in response to a pain model using optical stimulation in conjunction with slice electrophysiology. We found that acute carrageenan inflammation does not significantly affect the strength of excitatory PAG synapses onto VTA DA neurons. However, at the PAG synapses on VTA GABA neurons, the subunit composition of NMDA receptors is altered; the complement of NR2D subunits at synaptic sites appears to be lost. Thus, our data support a model in which injury initially alters synapses on VTA GABA neurons. Over time, these alterations may increase tonic inhibition of VTA DA neurons leading to their reduced firing.
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Affiliation(s)
- Claire Elena Manning
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California 94305-5101
| | - Michael Fritz
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California 94305-5101
| | - Julie Ann Kauer
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California 94305-5101
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7
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Qrareya AN, Mahdi F, Kaufman MJ, Ashpole NM, Paris JJ. Age-related neuroendocrine, cognitive, and behavioral co-morbidities are promoted by HIV-1 Tat expression in male mice. Aging (Albany NY) 2022; 14:5345-5365. [PMID: 35830469 PMCID: PMC9320553 DOI: 10.18632/aging.204166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022]
Abstract
In the U.S. about half of the HIV-infected individuals are aged 50 and older. In men living with HIV, secondary hypogonadism is common and occurs earlier than in seronegative men, and its prevalence increases with age. While the mechanisms(s) are unknown, the HIV-1 trans-activator of transcription (Tat) protein disrupts neuroendocrine function in mice partly by dysregulating mitochondria and neurosteroidogenesis. We hypothesized that conditional Tat expression in middle-aged male transgenic mice [Tat(+)] would promote age-related comorbidities compared to age-matched controls [Tat(−)]. We expected Tat to alter steroid hormone milieu consistent with behavioral deficits. Middle-aged Tat(+) mice had lower circulating testosterone and progesterone than age-matched controls and greater circulating corticosterone and central allopregnanolone than other groups. Young Tat(+) mice had greater circulating progesterone and estradiol-to-testosterone ratios. Older age or Tat exposure increased anxiety-like behavior (open field; elevated plus-maze), increased cognitive errors (radial arm water maze), and reduced grip strength. Young Tat(+), or middle-aged Tat(−), males had higher mechanical nociceptive thresholds than age-matched counterparts. Steroid levels correlated with behaviors. Thus, Tat may contribute to HIV-accelerated aging.
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Affiliation(s)
- Alaa N Qrareya
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Fakhri Mahdi
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Marc J Kaufman
- Department of Psychiatry, McLean Imaging Center, McLean Hospital/Harvard Medical School, Belmont, MA 02478, USA
| | - Nicole M Ashpole
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA.,Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS 38677, USA
| | - Jason J Paris
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA.,Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS 38677, USA
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Tang SN, Walter BA, Heimann MK, Gantt CC, Khan SN, Kokiko-Cochran ON, Askwith CC, Purmessur D. In vivo Mouse Intervertebral Disc Degeneration Models and Their Utility as Translational Models of Clinical Discogenic Back Pain: A Comparative Review. FRONTIERS IN PAIN RESEARCH 2022; 3:894651. [PMID: 35812017 PMCID: PMC9261914 DOI: 10.3389/fpain.2022.894651] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022] Open
Abstract
Low back pain is a leading cause of disability worldwide and studies have demonstrated intervertebral disc (IVD) degeneration as a major risk factor. While many in vitro models have been developed and used to study IVD pathophysiology and therapeutic strategies, the etiology of IVD degeneration is a complex multifactorial process involving crosstalk of nearby tissues and systemic effects. Thus, the use of appropriate in vivo models is necessary to fully understand the associated molecular, structural, and functional changes and how they relate to pain. Mouse models have been widely adopted due to accessibility and ease of genetic manipulation compared to other animal models. Despite their small size, mice lumbar discs demonstrate significant similarities to the human IVD in terms of geometry, structure, and mechanical properties. While several different mouse models of IVD degeneration exist, greater standardization of the methods for inducing degeneration and the development of a consistent set of output measurements could allow mouse models to become a stronger tool for clinical translation. This article reviews current mouse models of IVD degeneration in the context of clinical translation and highlights a critical set of output measurements for studying disease pathology or screening regenerative therapies with an emphasis on pain phenotyping. First, we summarized and categorized these models into genetic, age-related, and mechanically induced. Then, the outcome parameters assessed in these models are compared including, molecular, cellular, functional/structural, and pain assessments for both evoked and spontaneous pain. These comparisons highlight a set of potential key parameters that can be used to validate the model and inform its utility to screen potential therapies for IVD degeneration and their translation to the human condition. As treatment of symptomatic pain is important, this review provides an emphasis on critical pain-like behavior assessments in mice and explores current behavioral assessments relevant to discogenic back pain. Overall, the specific research question was determined to be essential to identify the relevant model with histological staining, imaging, extracellular matrix composition, mechanics, and pain as critical parameters for assessing degeneration and regenerative strategies.
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Affiliation(s)
- Shirley N. Tang
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States
| | - Benjamin A. Walter
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States
- Department of Orthopaedics, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
| | - Mary K. Heimann
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States
| | - Connor C. Gantt
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States
| | - Safdar N. Khan
- Department of Orthopaedics, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
| | - Olga N. Kokiko-Cochran
- Department of Neuroscience, The Ohio State University, Columbus, OH, United States
- Institute for Behavioral Medicine Research, Neurological Institute, The Ohio State University, Columbus, OH, United States
| | - Candice C. Askwith
- Department of Neuroscience, The Ohio State University, Columbus, OH, United States
| | - Devina Purmessur
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States
- Department of Orthopaedics, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
- *Correspondence: Devina Purmessur ;
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A peptide toxin in ant venom mimics vertebrate EGF-like hormones to cause long-lasting hypersensitivity in mammals. Proc Natl Acad Sci U S A 2022; 119:2112630119. [PMID: 35131940 PMCID: PMC8851504 DOI: 10.1073/pnas.2112630119] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2022] [Indexed: 12/14/2022] Open
Abstract
The targeting of mammalian ErbB receptor signaling by a venom toxin to cause hypersensitivity is a mode of action that has not previously been described. Natural selection of a defensive toxin to target ErbB signaling provides compelling independent evidence for a fundamental role of this receptor and its ligands in mammalian pain. The evolution of a toxin in ant venom to mimic a vertebrate nociceptive hormone serves as an example of both convergent evolution and molecular mimicry, illustrating how natural selection can shape the gene product of one organism to resemble that of another. Venoms are excellent model systems for studying evolutionary processes associated with predator–prey interactions. Here, we present the discovery of a peptide toxin, MIITX2-Mg1a, which is a major component of the venom of the Australian giant red bull ant Myrmecia gulosa and has evolved to mimic, both structurally and functionally, vertebrate epidermal growth factor (EGF) peptide hormones. We show that Mg1a is a potent agonist of the mammalian EGF receptor ErbB1, and that intraplantar injection in mice causes long-lasting hypersensitivity of the injected paw. These data reveal a previously undescribed venom mode of action, highlight a role for ErbB receptors in mammalian pain signaling, and provide an example of molecular mimicry driven by defensive selection pressure.
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10
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Effect of Ropivacaine-Loaded Magnetic Nanoparticles on Ankle Nerve Block in Rats. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2021; 2021:8553015. [PMID: 34899971 PMCID: PMC8660227 DOI: 10.1155/2021/8553015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 10/21/2021] [Indexed: 12/03/2022]
Abstract
Aim Our study is to determine the influence of ropivacaine-loaded magnetic nanoparticles (MNP/Rop) on ankle nerve block in rats. Materials and Methods MNP/Rop was prepared and then injected intravenously into rats to evaluate its anesthetic effect on rat limbs. Mechanical pain thresholds paw withdrawal threshold (PWT) and paw withdrawal thermal latency (PWL) were employed for the assessment of ankle nerve block in rats. Results PWT increased from T1 to T4 in each group (P < 0.05). The intergroup comparison determined no distinct difference in the PWT value among the three series at T1 (P > 0.05); however, PWT values at T2-T4 were higher in nerve block control group (NBCG) and MNP/Rop group than in blank group (BG), and they remained slightly higher in MNP/Rop group than in NBCG. The intragroup comparison revealed that from T1 to T4, PWL in each group showed a rising trend. The PWL at T1 showed no evident difference among the three series (P > 0.05); however, PWL values at T2-T4 were higher in NBCG and MNP/Rop group than in BG, and they remained slightly higher in MNP/Rop group than in NBCG. In MNP/Rop group, both PWT and PWL increased with the increase of Fe3O4 load in MNP/Rop (P < 0.05), while PWT and PWL remained unchanged when the load was 2.189%; moreover, PWT and PWL elevated as Rop concentration increased in MNP/Rop (P < 0.05), while they kept unaltered under 40 μL 1% Rop. Conclusion Intravenous injection of MNP/Rop into rats and inhalation of MNP into the ankle joint can effectively block ankle nerve conduction in rats.
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Stefanov B, Teixeira AP, Mansouri M, Bertschi A, Krawczyk K, Hamri GC, Xue S, Fussenegger M. Genetically Encoded Protein Thermometer Enables Precise Electrothermal Control of Transgene Expression. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2101813. [PMID: 34496151 PMCID: PMC8564464 DOI: 10.1002/advs.202101813] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/05/2021] [Indexed: 05/25/2023]
Abstract
Body temperature is maintained at around 37 °C in humans, but may rise to 40 °C or more during high-grade fever, which occurs in most adults who are seriously ill. However, endogenous temperature sensors, such as ion channels and heat-shock promoters, are fully activated only at noxious temperatures above this range, making them unsuitable for medical applications. Here, a genetically encoded protein thermometer (human enhanced gene activation thermometer; HEAT) is designed that can trigger transgene expression in the range of 37-40 °C by linking a mutant coiled-coil temperature-responsive protein sensor to a synthetic transcription factor. To validate the construct, a HEAT-transgenic monoclonal human cell line, FeverSense, is generated and it is confirmed that it works as a fever sensor that can temperature- and exposure-time-dependently trigger reporter gene expression in vitro and in vivo. For translational proof of concept, microencapsulated designer cells stably expressing a HEAT-controlled insulin production cassette in a mouse model of type-1 diabetes are subcutaneously implanted and topical heating patches are used to apply heat corresponding to a warm sensation in humans. Insulin release is induced, restoring normoglycemia. Thus, HEAT appears to be suitable for practical electrothermal control of cell-based therapy, and may also have potential for next-generation treatment of fever-associated medical conditions.
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Affiliation(s)
| | - Ana P. Teixeira
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
| | - Maysam Mansouri
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
| | - Adrian Bertschi
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
| | - Krzysztof Krawczyk
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
| | | | - Shuai Xue
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
| | - Martin Fussenegger
- ETH ZürichDepartment of Biosystems Science and EngineeringMattenstrasse 26Basel4058Switzerland
- University of BaselFaculty of Life ScienceBasel4056Switzerland
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12
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Starobova H, Monteleone M, Adolphe C, Batoon L, Sandrock CJ, Tay B, Deuis JR, Smith AV, Mueller A, Nadar EI, Lawrence GP, Mayor A, Tolson E, Levesque JP, Pettit AR, Wainwright BJ, Schroder K, Vetter I. Vincristine-induced peripheral neuropathy is driven by canonical NLRP3 activation and IL-1β release. J Exp Med 2021; 218:e20201452. [PMID: 33656514 PMCID: PMC7933984 DOI: 10.1084/jem.20201452] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/09/2020] [Accepted: 01/19/2021] [Indexed: 12/29/2022] Open
Abstract
Vincristine is an important component of many regimens used for pediatric and adult malignancies, but it causes a dose-limiting sensorimotor neuropathy for which there is no effective treatment. This study aimed to delineate the neuro-inflammatory mechanisms contributing to the development of mechanical allodynia and gait disturbances in a murine model of vincristine-induced neuropathy, as well as to identify novel treatment approaches. Here, we show that vincristine-induced peripheral neuropathy is driven by activation of the NLRP3 inflammasome and subsequent release of interleukin-1β from macrophages, with mechanical allodynia and gait disturbances significantly reduced in knockout mice lacking NLRP3 signaling pathway components, or after treatment with the NLRP3 inhibitor MCC950. Moreover, treatment with the IL-1 receptor antagonist anakinra prevented the development of vincristine-induced neuropathy without adversely affecting chemotherapy efficacy or tumor progression in patient-derived medulloblastoma xenograph models. These results detail the neuro-inflammatory mechanisms leading to vincristine-induced peripheral neuropathy and suggest that repurposing anakinra may be an effective co-treatment strategy to prevent vincristine-induced peripheral neuropathy.
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Affiliation(s)
- Hana Starobova
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Mercedes Monteleone
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Christelle Adolphe
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Lena Batoon
- Mater Research Institute and Faculty of Medicine, The University of Queensland, Woolloongabba, Queensland, Australia
- Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Cheyenne J. Sandrock
- Mater Research Institute and Faculty of Medicine, The University of Queensland, Woolloongabba, Queensland, Australia
- Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Bryan Tay
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Jennifer R. Deuis
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Alexandra V. Smith
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Alexander Mueller
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Evelyn Israel Nadar
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Grace Pamo Lawrence
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Amanda Mayor
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Elissa Tolson
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Jean-Pierre Levesque
- Mater Research Institute and Faculty of Medicine, The University of Queensland, Woolloongabba, Queensland, Australia
- Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Allison R. Pettit
- Mater Research Institute and Faculty of Medicine, The University of Queensland, Woolloongabba, Queensland, Australia
- Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Brandon J. Wainwright
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Kate Schroder
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
- The School of Pharmacy, The University of Queensland, Woolloongabba, Queensland, Australia
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13
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Eaton M, Zhang J, Ma Z, Park AC, Lietzke E, Romero CM, Liu Y, Coleman ER, Chen X, Xiao T, Que Z, Lai S, Wu J, Lee JH, Palant S, Nguyen HP, Huang Z, Skarnes WC, Koss WA, Yang Y. Generation and basic characterization of a gene-trap knockout mouse model of Scn2a with a substantial reduction of voltage-gated sodium channel Na v 1.2 expression. GENES, BRAIN, AND BEHAVIOR 2021; 20:e12725. [PMID: 33369088 DOI: 10.1111/gbb.12725] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/22/2020] [Accepted: 12/22/2020] [Indexed: 12/17/2022]
Abstract
Large-scale genetic studies revealed SCN2A as one of the most frequently mutated genes in patients with neurodevelopmental disorders. SCN2A encodes for the voltage-gated sodium channel isoform 1.2 (Nav 1.2) expressed in the neurons of the central nervous system. Homozygous knockout (null) of Scn2a in mice is perinatal lethal, whereas heterozygous knockout of Scn2a (Scn2a+/- ) results in mild behavior abnormalities. The Nav 1.2 expression level in Scn2a+/- mice is reported to be around 50-60% of the wild-type (WT) level, which indicates that a close to 50% reduction of Nav 1.2 expression may not be sufficient to lead to major behavioral phenotypes in mice. To overcome this barrier, we characterized a novel mouse model of severe Scn2a deficiency using a targeted gene-trap knockout (gtKO) strategy. This approach produces viable homozygous mice (Scn2agtKO/gtKO ) that can survive to adulthood, with about a quarter of Nav 1.2 expression compared to WT mice. Innate behaviors like nesting and mating were profoundly disrupted in Scn2agtKO/gtKO mice. Notably, Scn2agtKO/gtKO mice have a significantly decreased center duration compared to WT in the open field test, suggesting anxiety-like behaviors in a novel, open space. These mice also have decreased thermal and cold tolerance. Additionally, Scn2agtKO/gtKO mice have increased fix-pattern exploration in the novel object exploration test and a slight increase in grooming, indicating a detectable level of repetitive behaviors. They bury little to no marbles and have decreased interaction with novel objects. These Scn2a gene-trap knockout mice thus provide a unique model to study pathophysiology associated with severe Scn2a deficiency.
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Affiliation(s)
- Muriel Eaton
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Jingliang Zhang
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Zhixiong Ma
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Anthony C Park
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Emma Lietzke
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Chloé M Romero
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Yushuang Liu
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Emily R Coleman
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Xiaoling Chen
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Tiange Xiao
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Zhefu Que
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Shirong Lai
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Jiaxiang Wu
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Ji Hea Lee
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Sophia Palant
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Huynhvi P Nguyen
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
| | - Zhuo Huang
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China
| | - William C Skarnes
- Department of Cellular Engineering, The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, USA
| | - Wendy A Koss
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
- Office of the Executive Vice President for Research and Partnerships, Purdue University, West Lafayette, Indiana, USA
| | - Yang Yang
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, Indiana, USA
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14
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Hasan MM, Starobova H, Mueller A, Vetter I, Lewis RJ. Subcutaneous ω-Conotoxins Alleviate Mechanical Pain in Rodent Models of Acute Peripheral Neuropathy. Mar Drugs 2021; 19:106. [PMID: 33670311 PMCID: PMC7917901 DOI: 10.3390/md19020106] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 02/05/2021] [Accepted: 02/07/2021] [Indexed: 11/16/2022] Open
Abstract
The peripheral effects of ω-conotoxins, selective blockers of N-type voltage-gated calcium channels (CaV2.2), have not been characterised across different clinically relevant pain models. This study examines the effects of locally administered ω-conotoxin MVIIA, GVIA, and CVIF on mechanical and thermal paw withdrawal threshold (PWT) in postsurgical pain (PSP), cisplatin-induced neuropathy (CisIPN), and oxaliplatin-induced neuropathy (OIPN) rodent models. Intraplantar injection of 300, 100 and 30 nM MVIIA significantly (p < 0.0001, p < 0.0001, and p < 0.05, respectively) alleviated mechanical allodynia of mice in PSP model compared to vehicle control group. Similarly, intraplantar injection of 300, 100, and 30 nM MVIIA (p < 0.0001, p < 0.01, and p < 0.05, respectively), and 300 nM and 100 nM GVIA (p < 0.0001 and p < 0.05, respectively) significantly increased mechanical thresholds of mice in OIPN model. The ED50 of GVIA and MVIIA in OIPN was found to be 1.8 pmol/paw and 0.8 pmol/paw, respectively. However, none of the ω-conotoxins were effective in a mouse model of CisIPN. The intraplantar administration of 300 nM GVIA, MVIIA, and CVIF did not cause any locomotor side effects. The intraplantar administration of MVIIA can alleviate incision-induced mechanical allodynia, and GVIA and MVIIA effectively reduce OIPN associated mechanical pain, without locomotor side effects, in rodent models. In contrast, CVIF was inactive in these pain models, suggesting it is unable to block a subset of N-type voltage-gated calcium channels associated with nociceptors in the skin.
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Affiliation(s)
- Md. Mahadhi Hasan
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; (M.M.H.); (H.S.); (A.M.); (I.V.)
| | - Hana Starobova
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; (M.M.H.); (H.S.); (A.M.); (I.V.)
| | - Alexander Mueller
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; (M.M.H.); (H.S.); (A.M.); (I.V.)
| | - Irina Vetter
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; (M.M.H.); (H.S.); (A.M.); (I.V.)
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Richard J. Lewis
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia; (M.M.H.); (H.S.); (A.M.); (I.V.)
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15
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Qrareya AN, Mahdi F, Kaufman MJ, Ashpole NM, Paris JJ. HIV-1 Tat promotes age-related cognitive, anxiety-like, and antinociceptive impairments in female mice that are moderated by aging and endocrine status. GeroScience 2021; 43:309-327. [PMID: 32940828 PMCID: PMC8050151 DOI: 10.1007/s11357-020-00268-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022] Open
Abstract
Hypogonadism is a common comorbidity associated with HIV-1 that is more prevalent among infected individuals over the age of 45. The underlying mechanisms are unknown, but both combined antiretroviral therapeutics and HIV-1 proteins, such as trans-activator of transcription protein (Tat), dysregulate steroid-synthetic mechanisms including lipid storage/synthesis and mitochondrial function. Thus, Tat expression may accelerate age-related comorbidities partly by impairing endocrine function. Few studies exist of Tat-mediated behavioral deficits in aged animals and effects of endocrine status have not been investigated. Accordingly, we tested whether conditional Tat expression in aged (~ 1.5 years old), female, Tat-transgenic [Tat(+)] mice increases anxiety-like behavior, impairs cognition, and augments mechanical allodynia, when compared to age-matched controls that do not express Tat protein [Tat(-)]. We further tested whether aged mice that maintained their endocrine status (pre-estropausal) were more resilient to Tat/age-related comorbidities than peri- or post-estropausal mice. Tat and endocrine aging status exerted separate and interacting effects that influenced anxiety-like and cognitive behaviors. Peri- and post-estropausal mice exhibited greater anxiety-like behavior in the elevated plus-maze and impaired learning in the radial arm water maze compared to pre-estropausal mice. Irrespective of estropause status, Tat(+) mice demonstrated impaired learning, reduced grip strength, and mechanical allodynia compared to Tat(-) mice. Tat exposure reduced circulating estradiol in post-estropausal mice and increased the estradiol-to-testosterone ratio in pre-estropausal mice. Changes in circulating estradiol, testosterone, and progesterone correlated with grip strength. Thus, endocrine status is an important factor in age-related anxiety, cognition, neuromuscular function, and allodynia that can be accelerated by HIV-1 Tat protein.
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Affiliation(s)
- Alaa N Qrareya
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, 315 Faser Hall, P.O. Box 1848, University, MS, 38677-1848, USA
| | - Fakhri Mahdi
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, 315 Faser Hall, P.O. Box 1848, University, MS, 38677-1848, USA
| | - Marc J Kaufman
- Department of Psychiatry, McLean Imaging Center, McLean Hospital/Harvard Medical School, Belmont, MA, 02478, USA
| | - Nicole M Ashpole
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, 315 Faser Hall, P.O. Box 1848, University, MS, 38677-1848, USA
- Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, 38677, USA
| | - Jason J Paris
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, 315 Faser Hall, P.O. Box 1848, University, MS, 38677-1848, USA.
- Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, 38677, USA.
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16
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Tamim-Yecheskel BC, Fraiberg M, Kokabi K, Freud S, Shatz O, Marvaldi L, Subic N, Brenner O, Tsoory M, Eilam-Altstadter R, Biton I, Savidor A, Dezorella N, Heimer G, Behrends C, Ben-Zeev B, Elazar Z. A tecpr2 knockout mouse exhibits age-dependent neuroaxonal dystrophy associated with autophagosome accumulation. Autophagy 2020; 17:3082-3095. [PMID: 33218264 DOI: 10.1080/15548627.2020.1852724] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Mutations in the coding sequence of human TECPR2 were recently linked to spastic paraplegia type 49 (SPG49), a hereditary neurodegenerative disorder involving intellectual disability, autonomic-sensory neuropathy, chronic respiratory disease and decreased pain sensitivity. Here, we report the generation of a novel CRISPR-Cas9 tecpr2 knockout (tecpr2-/-) mouse that exhibits behavioral pathologies observed in SPG49 patients. tecpr2-/- mice develop neurodegenerative patterns in an age-dependent manner, manifested predominantly as neuroaxonal dystrophy in the gracile (GrN) and cuneate nuclei (CuN) of the medulla oblongata in the brainstem and dorsal white matter column of the spinal cord. Age-dependent correlation with accumulation of autophagosomes suggests compromised targeting to lysosome. Taken together, our findings establish the tecpr2 knockout mouse as a potential model for SPG49 and ascribe a new role to TECPR2 in macroautophagy/autophagy-related neurodegenerative disorders.
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Affiliation(s)
| | - Milana Fraiberg
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Kamilya Kokabi
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Saskia Freud
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Oren Shatz
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Letizia Marvaldi
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Nemanja Subic
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
| | - Ori Brenner
- Veterinary Recourses, The Weizmann Institute of Science, Rehovot, Israel
| | - Michael Tsoory
- Veterinary Recourses, The Weizmann Institute of Science, Rehovot, Israel
| | | | - Inbal Biton
- Veterinary Recourses, The Weizmann Institute of Science, Rehovot, Israel
| | - Alon Savidor
- Chemical Research Support, The Weizmann Institute of Science, Rehovot, Israel
| | - Nili Dezorella
- Irving and Cherna Moskowitz Center for Nano and Bio-Nano Imaging, The Weizmann Institute of Science, Rehovot, Israel
| | - Gali Heimer
- Department of Pediatric Neurology Unit, Edmond and Lilly Safra Children Hospital, Chaim Sheba Medical Center, Ramat Gan, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Christian Behrends
- Munich Cluster for Systems Neurology (Synergy), Ludwig-Maximilians-Universität München, München, Germany
| | - Bruria Ben-Zeev
- Department of Pediatric Neurology Unit, Edmond and Lilly Safra Children Hospital, Chaim Sheba Medical Center, Ramat Gan, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Zvulun Elazar
- Departments of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, Israel
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17
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McVeigh LG, Perugini AJ, Fehrenbacher JC, White FA, Kacena MA. Assessment, Quantification, and Management of Fracture Pain: from Animals to the Clinic. Curr Osteoporos Rep 2020; 18:460-470. [PMID: 32827293 PMCID: PMC7541703 DOI: 10.1007/s11914-020-00617-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW Fractures are painful and disabling injuries that can occur due to trauma, especially when compounded with pathologic conditions, such as osteoporosis in older adults. It is well documented that acute pain management plays an integral role in the treatment of orthopedic patients. There is no current therapy available to completely control post-fracture pain that does not interfere with bone healing or have major adverse effects. In this review, we focus on recent advances in the understanding of pain behaviors post-fracture. RECENT FINDINGS We review animal models of bone fracture and the assays that have been developed to assess and quantify spontaneous and evoked pain behaviors, including the two most commonly used assays: dynamic weight bearing and von Frey testing to assess withdrawal from a cutaneous (hindpaw) stimulus. Additionally, we discuss the assessment and quantification of fracture pain in the clinical setting, including the use of numeric pain rating scales, satisfaction with pain relief, and other biopsychosocial factor measurements. We review how pain behaviors in animal models and clinical cases can change with the use of current pain management therapies. We conclude by discussing the use of pain behavioral analyses in assessing potential therapeutic treatment options for addressing acute and chronic fracture pain without compromising fracture healing. There currently is a lack of effective treatment options for fracture pain that reliably relieve pain without potentially interfering with bone healing. Continued development and verification of reliable measurements of fracture pain in both pre-clinical and clinical settings is an essential aspect of continued research into novel analgesic treatments for fracture pain.
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Affiliation(s)
- Luke G McVeigh
- Department of Orthopaedic Surgery, Indiana University School of Medicine, 1130 W. Michigan St, FH 115, Indianapolis, IN, 46202, USA
| | - Anthony J Perugini
- Department of Orthopaedic Surgery, Indiana University School of Medicine, 1130 W. Michigan St, FH 115, Indianapolis, IN, 46202, USA
| | - Jill C Fehrenbacher
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Fletcher A White
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
- Richard L. Roudebush VA Medical Center, Indianapolis, IN, USA
| | - Melissa A Kacena
- Department of Orthopaedic Surgery, Indiana University School of Medicine, 1130 W. Michigan St, FH 115, Indianapolis, IN, 46202, USA.
- Richard L. Roudebush VA Medical Center, Indianapolis, IN, USA.
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18
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Al-Hariri MT, Abualait TS. Effects of Green Brazilian Propolis Alcohol Extract on Nociceptive Pain Models in Rats. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1102. [PMID: 32867097 PMCID: PMC7570148 DOI: 10.3390/plants9091102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/22/2020] [Accepted: 08/25/2020] [Indexed: 12/13/2022]
Abstract
Pain is one of the most common symptoms encountered in the medical practice. None of the management procedures used currently offer a complete relief for patients suffering from nociceptive pain. New treatment strategies for pain management are needed. Propolis has been used in traditional medicine to relieve various types of pain. The aim of the current study was to investigate the potential effects of the green Brazilian propolis alcohol extract in vivo on the nociceptive and inflammatory pain models in rats. Rats were distributed into three random groups (n = 6); Group I: control group received normal saline intraperitoneally (i.p.); Group II: treated with green Brazilian propolis alcohol extract (P50 mg/kg i.p.); Group III: treated with P100 mg/kg i.p. After sixty minutes, 50 μL of 5% formalin was injected subcutaneously into the dorsal surface of the right hind paw. The nociceptive response was identified by counting the number of flinches of the injected paw. The number of flinches was counted for the period of 0-5 min (early phase; neurogenic) and 10-60 min (late phase; inflammatory). Thermal hyperalgesia was assessed using three-paw withdrawal latency measurement with ten minutes intervals using a planter analgesic meter. Abdominal writhe (contraction) was induced by i.p. injection of acetic acid (1 mL of 2%). The results showed that green Brazilian propolis alcohol extract caused a significant inhibition of acetic acid-induced pain and significantly increased the pain threshold against infrared and formalin tests. The promising antinociceptive and anti-inflammatory properties of propolis and/or its active constituents as natural compounds in the present study indicates that it merits further studies in pain.
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Affiliation(s)
- Mohammed T. Al-Hariri
- Department of Physiology, College of Medicine, Imam Abdulrahman Bin Faisal University, P.O. Box 2114, Dammam 31541, Saudi Arabia
| | - Turki S. Abualait
- Department of Physical Therapy, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia;
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19
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Elina KC, Moon HC, Islam J, Kim HK, Park YS. The Effect of Optogenetic Inhibition of the Anterior Cingulate Cortex in Neuropathic Pain Following Sciatic Nerve Injury. J Mol Neurosci 2020; 71:638-650. [PMID: 32808249 DOI: 10.1007/s12031-020-01685-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/11/2020] [Indexed: 12/18/2022]
Abstract
Cortical disinhibition is the underlying pathological alteration contributing to neuropathic pain associated with peripheral nerve injury. Nerve injury resulting in disinhibition of the anterior cingulate cortex has been reported. However, the effect of optogenetic inhibition of the anterior cingulate cortex (ACC) on the sensory component of nerve injury-induced neuropathic pain has not been well studied. To investigate the feasibility of optogenetic ACC modulation, we injected an optogenetic virus or a null virus into the ACC of a nerve injury-induced neuropathic pain model. The unilateral ACC was modulated, and the optogenetic effect was measured by mechanical and thermal sensitivity tests. The assessment was performed in "pre-light off," "stimulation-yellow light on," and "post-light off" states. Optogenetic inhibition of the ACC in injury models revealed improved mechanical and thermal latencies with profound pain-relieving effects against nerve injury-induced neuropathic pain. The sensory thalamic discharge in electrophysiological in vivo recordings was also altered during laser stimulation. This finding indicates that hyperactivity of the ACC in nerve injury increases output to the spinothalamic tract through direct or indirect pathways. The direct photoinhibition of ACC neurons could play a vital role in restoring equilibrium and provide novel insight into techniques that can assuage peripheral nerve injury-induced neuropathic pain.
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Affiliation(s)
- K C Elina
- Department of Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Hyeong Cheol Moon
- Department of Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
- Department of Neurosurgery, Chungbuk National University Hospital, 776, 1 Sunhwanro, Seowon-gu, Cheongju-Si, Chungbuk, 28644, South Korea
| | - Jaisan Islam
- Department of Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Hyong Kyu Kim
- Department of Medical and Microbiology, College of Medicine, Cheongju, South Korea
| | - Young Seok Park
- Department of Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea.
- Department of Neurosurgery, Chungbuk National University Hospital, 776, 1 Sunhwanro, Seowon-gu, Cheongju-Si, Chungbuk, 28644, South Korea.
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20
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Molecular Insight into the Anti-Inflammatory Effects of the Curcumin Ester Prodrug Curcumin Diglutaric Acid In Vitro and In Vivo. Int J Mol Sci 2020; 21:ijms21165700. [PMID: 32784830 PMCID: PMC7461142 DOI: 10.3390/ijms21165700] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/30/2020] [Accepted: 08/03/2020] [Indexed: 12/14/2022] Open
Abstract
Curcumin diglutaric acid (CurDG), an ester prodrug of curcumin, has the potential to be developed as an anti-inflammatory agent due to its improved solubility and stability. In this study, the anti-inflammatory effects of CurDG were evaluated. The effects of CurDG on inflammatory mediators were evaluated in LPS-stimulated RAW 264.7 macrophage cells. CurDG reduced the increased levels of NO, IL-6, and TNF- α, as well as iNOS and COX-2 expression in cells to a greater extent than those of curcumin, along with the potent inhibition of MAPK (ERK1/2, JNK, and p38) activity. The anti-inflammatory effects were assessed in vivo by employing a carrageenan-induced mouse paw edema model. Oral administration of CurDG demonstrated significant anti-inflammatory effects in a dose-dependent manner in mice. The effects were significantly higher compared to those of curcumin at the corresponding doses (p < 0.05). Moreover, 25 mg/kg curcumin did not exert a significant anti-inflammatory effect for the overall time course as indicated by the area under the curve data, while the equimolar dose of CurDG produced significant anti-inflammatory effects comparable with 50, 100, and 200 mg/kg curcumin (p < 0.05). Similarly, CurDG significantly reduced the proinflammatory cytokine expression in paw edema tissues compared to curcumin (p < 0.05). These results provide the first experimental evidence for CurDG as a promising anti-inflammatory agent.
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21
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Yam MF, Loh YC, Oo CW, Basir R. Overview of Neurological Mechanism of Pain Profile Used for Animal "Pain-Like" Behavioral Study with Proposed Analgesic Pathways. Int J Mol Sci 2020; 21:ijms21124355. [PMID: 32575378 PMCID: PMC7352401 DOI: 10.3390/ijms21124355] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/06/2020] [Accepted: 05/11/2020] [Indexed: 12/16/2022] Open
Abstract
Pain is the most common sensation installed in us naturally which plays a vital role in defending us against severe harm. This neurological mechanism pathway has been one of the most complex and comprehensive topics but there has never been an elaborate justification of the types of analgesics that used to reduce the pain sensation through which specific pathways. Of course, there have been some answers to curbing of pain which is a lifesaver in numerous situations-chronic and acute pain conditions alike. This has been explored by scientists using pain-like behavioral study methodologies in non-anesthetized animals since decades ago to characterize the analgesic profile such as centrally or peripherally acting drugs and allowing for the development of analgesics. However, widely the methodology is being practiced such as the tail flick/Hargreaves test and Von Frey/Randall-Selitto tests which are stimulus-evoked nociception studies, and there has rarely been a complete review of all these methodologies, their benefits and its downside coupled with the mechanism of the action that is involved. Thus, this review solely focused on the complete protocol that is being adapted in each behavioral study methods induced by different phlogogenic agents, the different assessment methods used for phasic, tonic and inflammatory pain studies and the proposed mechanism of action underlying each behavioral study methodology for analgesic drug profiling. It is our belief that this review could significantly provide a concise idea and improve our scientists' understanding towards pain management in future research.
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Affiliation(s)
- Mun Fei Yam
- Department of Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia;
| | - Yean Chun Loh
- Department of Organic Chemistry, School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia;
- Correspondence: (Y.C.L.); (R.B.); Tel.: +60-46536018 (Y.C.L.); +60-389472448 (R.B.)
| | - Chuan Wei Oo
- Department of Organic Chemistry, School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia;
| | - Rusliza Basir
- Department of Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Correspondence: (Y.C.L.); (R.B.); Tel.: +60-46536018 (Y.C.L.); +60-389472448 (R.B.)
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22
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McMahon KL, Tay B, Deuis JR, Tanaka BS, Peigneur S, Jin AH, Tytgat J, Waxman SG, Dib-Hajj SD, Vetter I, Schroeder CI. Pharmacological activity and NMR solution structure of the leech peptide HSTX-I. Biochem Pharmacol 2020; 181:114082. [PMID: 32524995 DOI: 10.1016/j.bcp.2020.114082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 10/24/2022]
Abstract
The role of voltage-gated sodium (NaV) channels in pain perception is indisputable. Of particular interest as targets for the development of pain therapeutics are the tetrodotoxin-resistant isoforms NaV1.8 and NaV1.9, based on animal as well as human genetic studies linking these ion channel subtypes to the pathogenesis of pain. However, only a limited number of inhibitors selectively targeting these channels have been reported. HSTX-I is a peptide toxin identified from saliva of the leech Haemadipsa sylvestris. The native 23-residue peptide, stabilised by two disulfide bonds, has been reported to inhibit rat NaV1.8 and mouse NaV1.9 with low micromolar activity, and may therefore represent a scaffold for development of novel modulators with activity at human tetrodotoxin-resistant NaV isoforms. We synthetically produced this hydrophobic peptide in high yield using a one-pot oxidation and single step purification and determined the three-dimensional solution structure of HSTX-I using NMR solution spectroscopy. However, in our hands, the synthetic HSTX-I displayed only very modest activity at human NaV1.8 and NaV1.9, and lacked analgesic efficacy in a murine model of inflammatory pain.
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Affiliation(s)
- Kirsten L McMahon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Bryan Tay
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jennifer R Deuis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Brian S Tanaka
- Center for Neuroscience and Regeneration Research, New Haven, CT, United States; Department of Neurology, Yale University School of Medicine, New Haven, CT, United States; Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, United States
| | - Steve Peigneur
- Toxicology and Pharmacology, Katholieke Universiteit (KU) Leuven, Campus Gasthuisberg, Leuven, Belgium
| | - Ai-Hua Jin
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jan Tytgat
- Toxicology and Pharmacology, Katholieke Universiteit (KU) Leuven, Campus Gasthuisberg, Leuven, Belgium
| | - Stephen G Waxman
- Center for Neuroscience and Regeneration Research, New Haven, CT, United States; Department of Neurology, Yale University School of Medicine, New Haven, CT, United States; Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, United States
| | - Sulayman D Dib-Hajj
- Center for Neuroscience and Regeneration Research, New Haven, CT, United States; Department of Neurology, Yale University School of Medicine, New Haven, CT, United States; Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, United States
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia; School of Pharmacy, The University of Queensland, Woolloongabba, Queensland 4103, Australia.
| | - Christina I Schroeder
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia; National Cancer Institute, National Institutes of Health, Frederick, MD 21702, United States.
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23
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Israel MR, Dash TS, Bothe SN, Robinson SD, Deuis JR, Craik DJ, Lampert A, Vetter I, Durek T. Characterization of Synthetic Tf2 as a Na V1.3 Selective Pharmacological Probe. Biomedicines 2020; 8:biomedicines8060155. [PMID: 32545167 PMCID: PMC7345637 DOI: 10.3390/biomedicines8060155] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/02/2020] [Accepted: 06/05/2020] [Indexed: 12/17/2022] Open
Abstract
NaV1.3 is a subtype of the voltage-gated sodium channel family. It has been implicated in the pathogenesis of neuropathic pain, although the contribution of this channel to neuronal excitability is not well understood. Tf2, a β-scorpion toxin previously identified from the venom of Tityus fasciolatus, has been reported to selectively activate NaV1.3. Here, we describe the activity of synthetic Tf2 and assess its suitability as a pharmacological probe for NaV1.3. As described for the native toxin, synthetic Tf2 (1 µM) caused early channel opening, decreased the peak current, and shifted the voltage dependence of NaV1.3 activation in the hyperpolarizing direction by −11.3 mV, with no activity at NaV1.1, NaV1.2, and NaV1.4-NaV1.8. Additional activity was found at NaV1.9, tested using the hNav1.9_C4 chimera, where Tf2 (1 µM) shifted the voltage dependence of activation by −6.3 mV. In an attempt to convert Tf2 into an NaV1.3 inhibitor, we synthetized the analogue Tf2[S14R], a mutation previously described to remove the excitatory activity of related β-scorpion toxins. Indeed, Tf2[S14R](10 µM) had reduced excitatory activity at NaV1.3, although it still caused a small −5.8 mV shift in the voltage dependence of activation. Intraplantar injection of Tf2 (1 µM) in mice caused spontaneous flinching and swelling, which was not reduced by the NaV1.1/1.3 inhibitor ICA-121431 nor in NaV1.9-/- mice, suggesting off-target activity. In addition, despite a loss of excitatory activity, intraplantar injection of Tf2[S14R](10 µM) still caused swelling, providing strong evidence that Tf2 has additional off-target activity at one or more non-neuronal targets. Therefore, due to activity at NaV1.9 and other yet to be identified target(s), the use of Tf2 as a selective pharmacological probe may be limited.
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Affiliation(s)
- Mathilde R. Israel
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
| | - Thomas S. Dash
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
| | - Stefanie N. Bothe
- Institute of Physiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany; (S.N.B.); (A.L.)
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University, 52074 Aachen, Germany
| | - Samuel D. Robinson
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
| | - Jennifer R. Deuis
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
| | - David J. Craik
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
| | - Angelika Lampert
- Institute of Physiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany; (S.N.B.); (A.L.)
- Research Training Group 2416 MultiSenses-MultiScales, RWTH Aachen University, 52074 Aachen, Germany
- Research Training Group 2415 ME3T, RWTH Aachen University, 52074 Aachen, Germany
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
- Correspondence: (I.V.); (T.D.); Tel.: +61-7-3346-2660 (I.V.); +61-7-3346-2021 (T.D.)
| | - Thomas Durek
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.R.I.); (T.S.D.); (S.D.R.); (J.R.D.); (D.J.C.)
- Correspondence: (I.V.); (T.D.); Tel.: +61-7-3346-2660 (I.V.); +61-7-3346-2021 (T.D.)
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Antiallodynic effects of the selective NaV1.7 inhibitor Pn3a in a mouse model of acute postsurgical pain: evidence for analgesic synergy with opioids and baclofen. Pain 2020; 160:1766-1780. [PMID: 31335646 DOI: 10.1097/j.pain.0000000000001567] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Pain is the leading cause of disability in the developed world but remains a poorly treated condition. Specifically, postsurgical pain continues to be a frequent and undermanaged condition. Here, we investigate the analgesic potential of pharmacological NaV1.7 inhibition in a mouse model of acute postsurgical pain, based on incision of the plantar skin and underlying muscle of the hind paw. We demonstrate that local and systemic treatment with the selective NaV1.7 inhibitor μ-theraphotoxin-Pn3a is effectively antiallodynic in this model and completely reverses mechanical hypersensitivity in the absence of motor adverse effects. In addition, the selective NaV1.7 inhibitors ProTx-II and PF-04856264 as well as the clinical candidate CNV1014802 also reduced mechanical allodynia. Interestingly, co-administration of the opioid receptor antagonist naloxone completely reversed analgesic effects of Pn3a, indicating an involvement of endogenous opioids in the analgesic activity of Pn3a. In addition, we found superadditive antinociceptive effects of subtherapeutic Pn3a doses not only with the opioid oxycodone but also with the GABAB receptor agonist baclofen. Transcriptomic analysis of gene expression changes in dorsal root ganglia of mice after surgery did not reveal any changes in mRNA expression of endogenous opioids or opioid receptors; however, several genes involved in pain, including Runx1 (Runt related transcription factor 1), Cacna1a (CaV2.1), and Cacna1b (CaV2.2), were downregulated. In summary, these findings suggest that pain after surgery can be successfully treated with NaV1.7 inhibitors alone or in combination with baclofen or opioids, which may present a novel and safe treatment strategy for this frequent and poorly managed condition.
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25
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Yu X, Abdul M, Fan BQ, Zhang L, Lin X, Wu Y, Fu H, Lin Q, Meng H. The release of exosomes in the medial prefrontal cortex and nucleus accumbens brain regions of chronic constriction injury (CCI) model mice could elevate the pain sensation. Neurosci Lett 2020; 723:134774. [PMID: 31981720 DOI: 10.1016/j.neulet.2020.134774] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/17/2020] [Accepted: 01/19/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Brain function relies on the capacity of neurons to locally modulate each other at the level of synapses. Therefore, the exosomal pathway may constitute a well-designed mechanism for local and systemic interneuronal transfer of information within functional brain networks. Exosomes bind to and are endocytosed by neurons of different brain regions to play a definite role. The medial prefrontal cortex (mPFC) and nucleus accumbens (NAc) brain regions are known to involve in pain modulation. Our study observes the roles of exosomal activity in these two dominant regions of the pain-related pathway, and there influence on the analgesic effects in CCI mice. METHODS We induced pain exosomes in the mPFC and NAc in the mice of chronic constriction injury of the sciatic nerve model to produce neuropathic pain, and assessed changes that might affect analgesic behaviors. These changes were measured through a combination of behavioral, surgical, and other cellular testings. RESULTS Our study found that pain expression was elevated in mice given exogenous exosomes isolated from CCI mice, especially at the 2 h and 4 h time interval, in mice given exosomes at the mPFC and NAc, respectively. We also found that inhibiting formation of pain exosomes through GW4869 within the mPFC and NAc can elevate the pain threshold. CONCLUSION Results from our study supported the idea that the release of mPFC and NAc exosomes of CCI model has elevated the pain sensations in the subjected mice. This study will further help in designing new clinical trials, and will revolutionize the drug-induced anesthetic responses.
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Affiliation(s)
- Xiaolu Yu
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China.
| | - Mannan Abdul
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China; Anesthesiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, China.
| | - Bing-Qian Fan
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China; Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China.
| | - Lilu Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China.
| | - Xing Lin
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China.
| | - Yan Wu
- Jiangsu Province Key Laboratory of Anesthesiology, School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China.
| | - Hui Fu
- Department of Neurology, Zibo Municipal First Hospital, Zibo, Shandong 255200, China.
| | - Qisi Lin
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, China.
| | - Hao Meng
- Department of Respiratory Medicine, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000, China.
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Greaves E, Rosser M, Saunders PTK. Endometriosis-Associated Pain - Do Preclinical Rodent Models Provide a Good Platform for Translation? ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2020; 232:25-55. [PMID: 33278006 DOI: 10.1007/978-3-030-51856-1_3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Pelvic pain is a common symptom of endometriosis. Our understanding of its etiology remains incomplete and medical management is limited by poor translation from preclinical models to clinical trials. In this review, we briefly consider the evidence, or lack thereof, that different subtypes of lesion, extra-uterine bleeding, and neuropathic pathways add to the complex and heterogeneous pain experience of women with the condition. We summarize the studies in rodent models of endometriosis that have used behavioral endpoints (evoked and non-evoked) to explore mechanisms of endometriosis-associated pain. Lesion innervation, activation of nerves by pronociceptive molecules released by immune cells, and a role for estrogen in modulating hyperalgesia are key endometriosis-associated pain mechanisms replicated in preclinical rodent models. The presence of ectopic (full thickness uterus or endometrial) tissue may be associated with changes in the spinal cord and brain, which appear to model changes reported in patients. While preclinical models using rats and mice have yielded insights that appear relevant to mechanisms responsible for the development of endometriosis-associated pain, they are limited in scope. Specifically, most studies are based on models that only resulted in the formation of superficial lesions and use induced (evoked) behavioral 'pain' tests. We suggest that translation for patient benefit will be improved by new approaches including models of ovarian and deep infiltrating disease and measurement of spontaneous pain behaviors. Future studies must also capitalize on new advances in the wider field of pain medicine to identify more effective treatments for endometriosis-associated pain.
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Affiliation(s)
- Erin Greaves
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, UK.
| | - Matthew Rosser
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, UK
| | - Philippa T K Saunders
- Centre for Inflammation Research, The Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
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27
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Wu XP, Yang YP, She RX, Xing ZM, Chen HW, Zhang YW. microRNA-329 reduces bone cancer pain through the LPAR1-dependent LPAR1/ERK signal transduction pathway in mice. Ther Adv Med Oncol 2019; 11:1758835919875319. [PMID: 31692673 PMCID: PMC6811758 DOI: 10.1177/1758835919875319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 08/19/2019] [Indexed: 12/11/2022] Open
Abstract
Background: Bone cancer pain (BCP) is a common symptom occurring among patients with
cancer and has a detrimental effect on their quality of life. Growing
evidence has implicated microRNA-329 (miR-329) in the progression of bone
diseases. In the present study, we aimed to elucidate the potential effects
of miR-329 on BCP in a BCP mouse model via binding to
lysophosphatidic acid receptor 1 (LPAR1) through the LPAR1/extracellular
signal-regulated kinase (ERK) signaling pathway. Methods: Initially, a BCP mouse model was established via injection
of 4 × 104 murine breast tumor (4T1 cell) cells (4 μl). The
interaction between miR-329 and LPAR1 was identified using a bioinformatics
website and dual luciferase reporter gene assay. The modeled mice were
subsequently treated with miR-329 mimic, LPAR1 shRNA, or both, in order to
examine the effect of miR-329 on the paw withdrawal threshold (PWT) and paw
withdrawal latency (PWL) of mice, the expression of LPAR1/ERK signaling
pathway-related genes. Results: The positive expression rate of LPAR1 protein and extent of ERK1/2
phosphorylation were increased in BCP mouse models. LPAR1 is a target gene
of miR-329, which can inhibit the expression of LPAR1. In response to
miR-329 overexpression and LPAR1 silencing, BCP mice showed increased PWT
and PWL, along with decreased LPAR1 expression and ratio of p-ERK/ERK. Conclusions: Altogether, the results obtained indicated that miR-329 can potentially
alleviate BCP in mice via the inhibition of LPAR1 and
blockade of the LPAR1/ERK signaling pathway, highlighting that upregulation
of miR-329 could serve as a therapeutic target for BCP treatment.
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Affiliation(s)
- Xian-Ping Wu
- Department of Anesthesiology, Shunde Hospital of Guangzhou University of Chinese Medicine, Foshan, P.R. China
| | - Yan-Ping Yang
- Department of Anesthesiology, Shunde Hospital of Guangzhou University of Chinese Medicine, Foshan, P.R. China
| | - Rui-Xuan She
- Department of Anesthesiology, Shunde Hospital of Guangzhou University of Chinese Medicine, Foshan, P.R. China
| | - Zu-Min Xing
- Department of Anesthesiology, Shunde Hospital of Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, P.R. China
| | - Han-Wen Chen
- Department of Anesthesiology, Shunde Hospital of Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, P.R. China
| | - Yi-Wen Zhang
- Department of Anesthesiology, Shunde Hospital of Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, P.R. China
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28
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Murthy SE, Loud MC, Daou I, Marshall KL, Schwaller F, Kühnemund J, Francisco AG, Keenan WT, Dubin AE, Lewin GR, Patapoutian A. The mechanosensitive ion channel Piezo2 mediates sensitivity to mechanical pain in mice. Sci Transl Med 2019; 10:10/462/eaat9897. [PMID: 30305457 DOI: 10.1126/scitranslmed.aat9897] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/19/2018] [Indexed: 12/19/2022]
Abstract
The brush of a feather and a pinprick are perceived as distinct sensations because they are detected by discrete cutaneous sensory neurons. Inflammation or nerve injury can disrupt this sensory coding and result in maladaptive pain states, including mechanical allodynia, the development of pain in response to innocuous touch. However, the molecular mechanisms underlying the alteration of mechanical sensitization are poorly understood. In mice and humans, loss of mechanically activated PIEZO2 channels results in the inability to sense discriminative touch. However, the role of Piezo2 in acute and sensitized mechanical pain is not well defined. Here, we showed that optogenetic activation of Piezo2-expressing sensory neurons induced nociception in mice. Mice lacking Piezo2 in caudal sensory neurons had impaired nocifensive responses to mechanical stimuli. Consistently, ex vivo recordings in skin-nerve preparations from these mice showed diminished Aδ-nociceptor and C-fiber firing in response to mechanical stimulation. Punctate and dynamic allodynia in response to capsaicin-induced inflammation and spared nerve injury was absent in Piezo2-deficient mice. These results indicate that Piezo2 mediates inflammation- and nerve injury-induced sensitized mechanical pain, and suggest that targeting PIEZO2 might be an effective strategy for treating mechanical allodynia.
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Affiliation(s)
- Swetha E Murthy
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Meaghan C Loud
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Ihab Daou
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Kara L Marshall
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Frederick Schwaller
- Department of Neuroscience, Max Delbrück Center for Molecular Medicine, Robert-Rössle Straße 10, Berlin 13125, Germany
| | - Johannes Kühnemund
- Department of Neuroscience, Max Delbrück Center for Molecular Medicine, Robert-Rössle Straße 10, Berlin 13125, Germany
| | - Allain G Francisco
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - William T Keenan
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Adrienne E Dubin
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Gary R Lewin
- Department of Neuroscience, Max Delbrück Center for Molecular Medicine, Robert-Rössle Straße 10, Berlin 13125, Germany.,Excellence Cluster Neurocure, Charité Universitätsmedizin, Berlin 13125, Germany
| | - Ardem Patapoutian
- Howard Hughes Medical Institute, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Sen MK, Mahns DA, Coorssen JR, Shortland PJ. Behavioural phenotypes in the cuprizone model of central nervous system demyelination. Neurosci Biobehav Rev 2019; 107:23-46. [PMID: 31442519 DOI: 10.1016/j.neubiorev.2019.08.008] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/01/2019] [Accepted: 08/12/2019] [Indexed: 12/14/2022]
Abstract
The feeding of cuprizone (CPZ) to animals has been extensively used to model the processes of demyelination and remyelination, with many papers adopting a narrative linked to demyelinating conditions like multiple sclerosis (MS), the aetiology of which is unknown. However, no current animal model faithfully replicates the myriad of symptoms seen in the clinical condition of MS. CPZ ingestion causes mitochondrial and endoplasmic reticulum stress and subsequent apoptosis of oligodendrocytes leads to central nervous system demyelination and glial cell activation. Although there are a wide variety of behavioural tests available for characterizing the functional deficits in animal models of disease, including that of CPZ-induced deficits, they have focused on a narrow subset of outcomes such as motor performance, cognition, and anxiety. The literature has not been systematically reviewed in relation to these or other symptoms associated with clinical MS. This paper reviews these tests and makes recommendations as to which are the most important in order to better understand the role of this model in examining aspects of demyelinating diseases like MS.
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Affiliation(s)
- Monokesh K Sen
- School of Medicine, Western Sydney University, New South Wales, Australia
| | - David A Mahns
- School of Medicine, Western Sydney University, New South Wales, Australia
| | - Jens R Coorssen
- Departments of Health Sciences and Biological Sciences, Faculties of Applied Health Sciences and Mathematics & Science, Brock University, Ontario, Canada.
| | - Peter J Shortland
- Science and Health, Western Sydney University, New South Wales, Australia.
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30
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Starobova H, Mueller A, Deuis JR, Carter DA, Vetter I. Inflammatory and Neuropathic Gene Expression Signatures of Chemotherapy-Induced Neuropathy Induced by Vincristine, Cisplatin, and Oxaliplatin in C57BL/6J Mice. THE JOURNAL OF PAIN 2019; 21:182-194. [PMID: 31260808 DOI: 10.1016/j.jpain.2019.06.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/04/2019] [Accepted: 06/13/2019] [Indexed: 12/21/2022]
Abstract
Vincristine, oxaliplatin, and cisplatin are commonly prescribed chemotherapeutic agents for the treatment of many tumors. However, a main side effect is chemotherapy-induced peripheral neuropathy (CIPN), which may lead to changes in chemotherapeutic treatment. Although symptoms associated with CIPN are recapitulated by mouse models, there is limited knowledge of how these drugs affect the expression of genes in sensory neurons. The present study carried out a transcriptomic analysis of dorsal root ganglia following vincristine, oxaliplatin, and cisplatin treatment with a view to gain insight into the comparative pathophysiological mechanisms of CIPN. RNA-Seq revealed 368, 295, and 256 differential expressed genes induced by treatment with vincristine, oxaliplatin, and cisplatin, respectively, and only 5 shared genes were dysregulated in all 3 groups. Cell type enrichment analysis and gene set enrichment analysis showed predominant effects on genes associated with the immune system after treatment with vincristine, while oxaliplatin treatment affected mainly neuronal genes. Treatment with cisplatin resulted in a mixed gene expression signature. PERSPECTIVE: These results provide insight into the recruitment of immune responses to dorsal root ganglia and indicate enhanced neuroinflammatory processes following administration of vincristine, oxaliplatin, and cisplatin. These gene expression signatures may provide insight into novel drug targets for treatment of CIPN.
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Affiliation(s)
- Hana Starobova
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland, Australia
| | - Alexander Mueller
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland, Australia
| | - Jennifer R Deuis
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland, Australia
| | - David A Carter
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland, Australia
| | - Irina Vetter
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland, Australia; School of Pharmacy, The University of Queensland, Woolloongabba, Queensland, Australia.
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31
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Starobova H, Mueller A, Allavena R, Lohman RJ, Sweet MJ, Vetter I. Minocycline Prevents the Development of Mechanical Allodynia in Mouse Models of Vincristine-Induced Peripheral Neuropathy. Front Neurosci 2019; 13:653. [PMID: 31316337 PMCID: PMC6610325 DOI: 10.3389/fnins.2019.00653] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 06/06/2019] [Indexed: 12/14/2022] Open
Abstract
Vincristine is an antineoplastic substance that is part of many chemotherapy regimens, used especially for the treatment of a variety of pediatric cancers including leukemias and brain tumors. Unfortunately, many vincristine-treated patients develop peripheral neuropathy, a side effect characterized by sensory, motoric, and autonomic symptoms. The sensory symptoms include pain, in particular hypersensitivity to light touch, as well as loss of sensory discrimination to detect vibration and touch. The symptoms of vincristine-induced neuropathy are only poorly controlled by currently available analgesics and therefore often necessitate dose reductions or even cessation of treatment. The aim of this study was to identify new therapeutic targets for the treatment of vincristine-induced peripheral neuropathy (VIPN) by combining behavioral experiments, histology, and pharmacology after vincristine treatment. Local intraplantar injection of vincristine into the hind paw caused dose- and time-dependent mechanical hypersensitivity that developed into mechanical hyposensitivity at high doses, and lead to a pronounced, dose-dependent infiltration of immune cells at the site of injection. Importantly, administration of minocycline effectively prevented the development of mechanical hypersensitivity and infiltration of immune cells in mouse models of vincristine induce peripheral neuropathy (VIPN) based on intraperitoneal or intraplantar administration of vincristine. Similarly, Toll-like receptor 4 knockout mice showed diminished vincristine-induced mechanical hypersensitivity and immune cell infiltration, while treatment with the anti-inflammatory meloxicam had no effect. These results provide evidence for the involvement of Toll-like receptor 4 in the development of VIPN and suggest that minocycline and/or direct Toll-like receptor 4 antagonists may be an effective preventative treatment for patients receiving vincristine.
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Affiliation(s)
- H Starobova
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, Saint Lucia, QLD, Australia
| | - A Mueller
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, Saint Lucia, QLD, Australia
| | - R Allavena
- School of Veterinary Science, The University of Queensland, Gatton, QLD, Australia
| | - R J Lohman
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia
| | - M J Sweet
- Centre for Inflammation and Disease Research, Institute for Molecular Bioscience, The University of Queensland, Saint Lucia, QLD, Australia
| | - I Vetter
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, Saint Lucia, QLD, Australia.,School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia
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32
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Morgan M, Deuis JR, Frøsig-Jørgensen M, Lewis RJ, Cabot PJ, Gray PD, Vetter I. Burn Pain: A Systematic and Critical Review of Epidemiology, Pathophysiology, and Treatment. PAIN MEDICINE 2019; 19:708-734. [PMID: 29036469 DOI: 10.1093/pm/pnx228] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Objective This review aims to examine the available literature on the epidemiology, pathophysiology, and treatment of burn-induced pain. Methods A search was conducted on the epidemiology of burn injury and treatment of burn pain utilizing the database Medline, and all relevant articles were systemically reviewed. In addition, a critical review was performed on the pathophysiology of burn pain and animal models of burn pain. Results The search on the epidemiology of burn injury yielded a total of 163 publications of interest, 72 of which fit the inclusion/exclusion criteria, with no publications providing epidemiological data on burn injury pain management outcomes. The search on the treatment of burn pain yielded a total of 213 publications, 14 of which fit the inclusion/exclusion criteria, highlighting the limited amount of evidence available on the treatment of burn-induced pain. Conclusions The pathophysiology of burn pain is poorly understood, with limited clinical trials available to assess the effectiveness of analgesics in burn patients. Further studies are needed to identify new pharmacological targets and treatments for the effective management of burn injury pain.
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Affiliation(s)
- Michael Morgan
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Jennifer R Deuis
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Majbrit Frøsig-Jørgensen
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Richard J Lewis
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Peter J Cabot
- School of Pharmacy, The University of Queensland, Wooloongabba, Queensland, Australia
| | - Paul D Gray
- Tess Cramond Multidisciplinary Pain Centre, Royal Brisbane & Women's Hospital, Metro North Health, Herston, Queensland, Australia.,School of Medicine, The University of Queensland, Herston, Queensland, Australia
| | - Irina Vetter
- Centre for Pain Research, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia.,School of Pharmacy, The University of Queensland, Wooloongabba, Queensland, Australia
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33
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Dash TS, Shafee T, Harvey PJ, Zhang C, Peigneur S, Deuis JR, Vetter I, Tytgat J, Anderson MA, Craik DJ, Durek T, Undheim EAB. A Centipede Toxin Family Defines an Ancient Class of CSαβ Defensins. Structure 2018; 27:315-326.e7. [PMID: 30554841 DOI: 10.1016/j.str.2018.10.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/21/2018] [Accepted: 10/22/2018] [Indexed: 10/27/2022]
Abstract
Disulfide-rich peptides (DRPs) play diverse physiological roles and have emerged as attractive sources of pharmacological tools and drug leads. Here we describe the 3D structure of a centipede venom peptide, U-SLPTX15-Sm2a, whose family defines a unique class of one of the most widespread DRP folds known, the cystine-stabilized α/β fold (CSαβ). This class, which we have named the two-disulfide CSαβ fold (2ds-CSαβ), contains only two internal disulfide bonds as opposed to at least three in all other confirmed CSαβ peptides, and constitutes one of the major neurotoxic peptide families in centipede venoms. We show the 2ds-CSαβ is widely distributed outside centipedes and is likely an ancient fold predating the split between prokaryotes and eukaryotes. Our results provide insights into the ancient evolutionary history of a widespread DRP fold and highlight the usefulness of 3D structures as evolutionary tools.
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Affiliation(s)
- Thomas S Dash
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Thomas Shafee
- La Trobe Institute for Molecular Science, La Trobe University, VIC 3083, Australia
| | - Peta J Harvey
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Chuchu Zhang
- Department of Physiology, University of California, San Francisco, CA 94143, USA
| | - Steve Peigneur
- Toxicology and Pharmacology, University of Leuven, Leuven 3000, Belgium
| | - Jennifer R Deuis
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia; School of Pharmacy, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Jan Tytgat
- Toxicology and Pharmacology, University of Leuven, Leuven 3000, Belgium
| | - Marilyn A Anderson
- La Trobe Institute for Molecular Science, La Trobe University, VIC 3083, Australia
| | - David J Craik
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Thomas Durek
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Eivind A B Undheim
- Centre for Advanced Imaging, The University of Queensland, St Lucia, QLD 4072, Australia.
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34
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Charles KA, Naudet F, Bouali-Benazzouz R, Landry M, De Deurwaerdère P, Fossat P, Benazzouz A. Alteration of nociceptive integration in the spinal cord of a rat model of Parkinson's disease. Mov Disord 2018; 33:1010-1015. [PMID: 29774960 DOI: 10.1002/mds.27377] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/06/2018] [Accepted: 02/11/2018] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Pain is a major non motor symptom that contributes to impaired quality of life in PD. However, its mechanism is unknown. OBJECTIVES AND METHODS We sought to identify the pain phenotypes and parallel changes in spinal integration of peripheral stimuli in a rat model of PD induced by lesions of SN dopamine neurons, using behavioral plantar and von Frey tests as well as electrophysiology of the dorsal horn. RESULTS We show that dopamine depletion by 6-OHDA induced hypersensitivity to mechanical and thermal stimuli. These abnormal behaviors were paralleled by increased neuronal responses and hyperexcitability of wide dynamic range neurons of lamina V of the dorsal horn of the spinal cord in response to electrical stimulation of the sciatic nerve in the 6-OHDA model as compared to sham rats. CONCLUSIONS These results provide evidence for alteration of nociceptive integration in the spinal dorsal horn neurons in 6-OHDA rats that can reflect changes in pain behavior. © 2018 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Keri-Ann Charles
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
| | - Frédéric Naudet
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
| | | | - Marc Landry
- CNRS, Intitut Interdisciplinaire de Neurosciences, UMR5297, Bordeaux, France
| | - Philippe De Deurwaerdère
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
| | - Pascal Fossat
- CNRS, Intitut Interdisciplinaire de Neurosciences, UMR5297, Bordeaux, France
| | - Abdelhamid Benazzouz
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France
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35
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Morgan M, Deuis JR, Woodruff TM, Lewis RJ, Vetter I. Role of complement anaphylatoxin receptors in a mouse model of acute burn-induced pain. Mol Immunol 2018; 94:68-74. [DOI: 10.1016/j.molimm.2017.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/21/2017] [Accepted: 12/18/2017] [Indexed: 01/06/2023]
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36
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Yang D, Yang Q, Wei X, Liu Y, Ma D, Li J, Wan Y, Luo Y. The role of miR-190a-5p contributes to diabetic neuropathic pain via targeting SLC17A6. J Pain Res 2017; 10:2395-2403. [PMID: 29042815 PMCID: PMC5634391 DOI: 10.2147/jpr.s133755] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Introduction MicroRNAs play a key role in neuropathic pain. In a previous study, miR-190a-5p was significantly downregulated in diabetic neuropathic pain (DNP). However, the role and pathological mechanism of miR-190a-5p in DNP still remain unclear. Materials and methods DNP model was established. The paw withdrawal thresholds were measured to assess the mechanical nociceptive response. Dual-luciferase reporter assay was used to confirm the target gene of microRNA. The expressions of microRNA, gene, and protein were detected by the quantitative real-time polymerase chain reaction or Western blot. The levels of IL-1β and IL-6 were detected with the enzyme-linked immuno sorbent assay. Results Compared with the control sample, the expression of miR-190a-5p was decreased and SLC17A6 was increased in the spinal tissue from those developing DNP. The bioinformatics and luciferase reporter assay demonstrated that SLC17A6 is a direct target of miR-190a-5p. Up-regulation of miR-190a-5p and inhibition of SLC17A6 could significantly weaken the painful behavior and reduce IL-1β and IL-6 level in DNP. Conclusion miR-190a-5p is involved in DNP via targeting SLC17A6, and miR-190a-5p and SLC17A6 may be the therapeutic targets of this disease.
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Affiliation(s)
- Di Yang
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Qinyan Yang
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Xinchuan Wei
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Yang Liu
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Ding Ma
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Jiaceng Li
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Yongling Wan
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Yao Luo
- Department of Anesthesiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
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Deuis JR, Dvorakova LS, Vetter I. Methods Used to Evaluate Pain Behaviors in Rodents. Front Mol Neurosci 2017; 10:284. [PMID: 28932184 PMCID: PMC5592204 DOI: 10.3389/fnmol.2017.00284] [Citation(s) in RCA: 626] [Impact Index Per Article: 89.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/22/2017] [Indexed: 12/16/2022] Open
Abstract
Rodents are commonly used to study the pathophysiological mechanisms of pain as studies in humans may be difficult to perform and ethically limited. As pain cannot be directly measured in rodents, many methods that quantify “pain-like” behaviors or nociception have been developed. These behavioral methods can be divided into stimulus-evoked or non-stimulus evoked (spontaneous) nociception, based on whether or not application of an external stimulus is used to elicit a withdrawal response. Stimulus-evoked methods, which include manual and electronic von Frey, Randall-Selitto and the Hargreaves test, were the first to be developed and continue to be in widespread use. However, concerns over the clinical translatability of stimulus-evoked nociception in recent years has led to the development and increasing implementation of non-stimulus evoked methods, such as grimace scales, burrowing, weight bearing and gait analysis. This review article provides an overview, as well as discussion of the advantages and disadvantages of the most commonly used behavioral methods of stimulus-evoked and non-stimulus-evoked nociception used in rodents.
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Affiliation(s)
- Jennifer R Deuis
- IMB Centre for Pain Research, Institute for Molecular Bioscience, The University of QueenslandSt. Lucia, QLD, Australia
| | - Lucie S Dvorakova
- IMB Centre for Pain Research, Institute for Molecular Bioscience, The University of QueenslandSt. Lucia, QLD, Australia
| | - Irina Vetter
- IMB Centre for Pain Research, Institute for Molecular Bioscience, The University of QueenslandSt. Lucia, QLD, Australia.,School of Pharmacy, The University of QueenslandWoolloongabba, QLD, Australia
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38
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Role of the NLRP3 inflammasome in a model of acute burn-induced pain. Burns 2017; 43:304-309. [DOI: 10.1016/j.burns.2016.09.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Revised: 08/11/2016] [Accepted: 09/01/2016] [Indexed: 12/28/2022]
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39
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Deuis JR, Dekan Z, Wingerd JS, Smith JJ, Munasinghe NR, Bhola RF, Imlach WL, Herzig V, Armstrong DA, Rosengren KJ, Bosmans F, Waxman SG, Dib-Hajj SD, Escoubas P, Minett MS, Christie MJ, King GF, Alewood PF, Lewis RJ, Wood JN, Vetter I. Pharmacological characterisation of the highly Na V1.7 selective spider venom peptide Pn3a. Sci Rep 2017; 7:40883. [PMID: 28106092 PMCID: PMC5247677 DOI: 10.1038/srep40883] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 12/12/2016] [Indexed: 12/19/2022] Open
Abstract
Human genetic studies have implicated the voltage-gated sodium channel NaV1.7 as a therapeutic target for the treatment of pain. A novel peptide, μ-theraphotoxin-Pn3a, isolated from venom of the tarantula Pamphobeteus nigricolor, potently inhibits NaV1.7 (IC50 0.9 nM) with at least 40-1000-fold selectivity over all other NaV subtypes. Despite on-target activity in small-diameter dorsal root ganglia, spinal slices, and in a mouse model of pain induced by NaV1.7 activation, Pn3a alone displayed no analgesic activity in formalin-, carrageenan- or FCA-induced pain in rodents when administered systemically. A broad lack of analgesic activity was also found for the selective NaV1.7 inhibitors PF-04856264 and phlotoxin 1. However, when administered with subtherapeutic doses of opioids or the enkephalinase inhibitor thiorphan, these subtype-selective NaV1.7 inhibitors produced profound analgesia. Our results suggest that in these inflammatory models, acute administration of peripherally restricted NaV1.7 inhibitors can only produce analgesia when administered in combination with an opioid.
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Affiliation(s)
- Jennifer R. Deuis
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Zoltan Dekan
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Joshua S. Wingerd
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Jennifer J. Smith
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Nehan R. Munasinghe
- Discipline of Pharmacology, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Rebecca F. Bhola
- Discipline of Pharmacology, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Wendy L. Imlach
- Discipline of Pharmacology, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Volker Herzig
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - David A. Armstrong
- School of Biomedical Sciences, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - K. Johan Rosengren
- School of Biomedical Sciences, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Frank Bosmans
- Department of Physiology & Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Stephen G. Waxman
- Department of Neurology and Center for Neuroscience and Regeneration Research, Yale University School of Medicine, New Haven, Connecticut 06510, Rehabilitation Research Center, Veterans Administration Connecticut Healthcare System, West Haven, Connecticut 06516, USA
| | - Sulayman D. Dib-Hajj
- Department of Neurology and Center for Neuroscience and Regeneration Research, Yale University School of Medicine, New Haven, Connecticut 06510, Rehabilitation Research Center, Veterans Administration Connecticut Healthcare System, West Haven, Connecticut 06516, USA
| | | | - Michael S. Minett
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, UK
| | - Macdonald J. Christie
- Discipline of Pharmacology, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Glenn F. King
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Paul F. Alewood
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Richard J. Lewis
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - John N. Wood
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, UK
| | - Irina Vetter
- IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia
- School of Pharmacy, The University of Queensland, Pharmacy Australia Centre of Excellence, 20 Cornwall St, Woolloongabba, Queensland, 4102, Australia
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Yin K, Deuis JR, Lewis RJ, Vetter I. Transcriptomic and behavioural characterisation of a mouse model of burn pain identify the cholecystokinin 2 receptor as an analgesic target. Mol Pain 2016; 12:12/0/1744806916665366. [PMID: 27573516 PMCID: PMC5007901 DOI: 10.1177/1744806916665366] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/22/2016] [Indexed: 12/23/2022] Open
Abstract
Burn injury is a cause of significant mortality and morbidity worldwide and is frequently associated with severe and long-lasting pain that remains difficult to manage throughout recovery. We characterised a mouse model of burn-induced pain using pharmacological and transcriptomic approaches. Mechanical allodynia elicited by burn injury was partially reversed by meloxicam (5 mg/kg), gabapentin (100 mg/kg) and oxycodone (3 and 10 mg/kg), while thermal allodynia and gait abnormalities were only significantly improved by amitriptyline (3 mg/kg) and oxycodone (10 mg/kg). The need for relatively high opioid doses to elicit analgesia suggested a degree of opioid resistance, similar to that shown clinically in burn patients. We thus assessed the gene expression changes in dorsal root ganglion neurons and pathophysiological mechanisms underpinning burn injury-induced pain using a transcriptomic approach. Burn injury was associated with significantly increased expression of genes associated with axon guidance, neuropeptide signalling, behavioural defence response and extracellular signalling, confirming a mixed neuropathic and inflammatory aetiology. Notably, among the pain-related genes that were upregulated post-injury was the cholecystokinin 2 receptor (Cckbr), a G protein-coupled receptor known as a pain target involved in reducing opioid effectiveness. Indeed, the clinically used cholecystokinin receptor antagonist proglumide (30 mg/kg) was effective at reversing mechanical allodynia, with additional analgesia evident in combination with low-dose oxycodone (1 mg/kg), including significant reversal of thermal allodynia. These findings highlight the complex pathophysiological mechanisms underpinning burn injury-induced pain and suggest that cholecystokinin-2 receptor antagonists may be useful clinically as adjuvants to decrease opioid requirements and improve analgesic management.
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Affiliation(s)
- Kathleen Yin
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Jennifer R Deuis
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Richard J Lewis
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Irina Vetter
- Centre for Pain Research, Institute for Molecular Bioscience, University of Queensland, Queensland, Australia Pharmacy Australia Centre of Excellence, University of Queensland, Queensland, Australia
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