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Zheng YN, Zheng YL, Wang XQ, Chen PJ. Role of Exercise on Inflammation Cytokines of Neuropathic Pain in Animal Models. Mol Neurobiol 2024:10.1007/s12035-024-04214-4. [PMID: 38714582 DOI: 10.1007/s12035-024-04214-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 04/25/2024] [Indexed: 05/10/2024]
Abstract
Neuropathic pain (NP) resulting from a lesion or disease of the somatosensory system can lead to loss of function and reduced life quality. Neuroinflammation plays a vital role in the development and maintenance of NP. Exercise as an economical, effective, and nonpharmacological treatment, recommended by clinical practice guidelines, has been proven to alleviate chronic NP. Previous studies have shown that exercise decreases NP by modifying inflammation; however, the exact mechanisms of exercise-mediated NP are unclear. Therefore, from the perspective of neuroinflammation, this review mainly discussed the effects of exercise on inflammatory cytokines in different parts of NP conduction pathways, such as the brain, spinal cord, dorsal root ganglion, sciatic nerve, and blood in rat/mice models. Results suggested that exercise training could modulate neuroinflammation, inhibit astrocyte glial cell proliferation and microglial activation, alter the macrophage phenotype, reduce the expression of proinflammatory cytokines, increase anti-inflammatory cytokine levels, and positively modulate the state of the immune system, thereby relieving NP.
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Affiliation(s)
- Ya-Nan Zheng
- Department of Sport Rehabilitation, Shanghai University of Sport, 399 Changhai Road, Yangpu District, Shanghai, China
- Rehabilitation Treatment Center, The First Rehabilitation Hospital of Shanghai, Shanghai, 200090, China
| | - Yi-Li Zheng
- Department of Sport Rehabilitation, Shanghai University of Sport, 399 Changhai Road, Yangpu District, Shanghai, China
| | - Xue-Qiang Wang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027, Zhejiang, China.
| | - Pei-Jie Chen
- Department of Sport Rehabilitation, Shanghai University of Sport, 399 Changhai Road, Yangpu District, Shanghai, China.
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2
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Cervini GA, Rice M, Jasperse JL. Potential Local Mechanisms for Exercise-Induced Hypoalgesia in Response to Blood Flow Restriction Training. Cureus 2023; 15:e43219. [PMID: 37692724 PMCID: PMC10490383 DOI: 10.7759/cureus.43219] [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: 03/27/2023] [Accepted: 08/09/2023] [Indexed: 09/12/2023] Open
Abstract
Overall, there is a great need within sports medicine to ensure that athletes can return from injury in an efficient, yet thorough manner. It is crucial to not avoid necessary difficulties in this process but also to ensure time-efficient rehabilitation. One of the more promising techniques to achieve timely recovery is blood flow restriction (BFR) training. BFR training is a growing and novel development that could be a vital tool to lighten the burden of recovery from injury in athletes. BFR utilizes a pneumatic tourniquet to limit blood flow in specific areas of the body. The use of BFR has been shown to potentially enhance the analgesic effects of exercise-induced hypoalgesia (EIH). By limiting pain, athletes will be less burdened by mobility and loading exercises required for them to effectively return to play. In a field where time away from sports can have massive implications, the need for tools to assist in the acceleration of the rehabilitation process is vital. Much of the work that has already been done in the field has been able to exploit the benefits of EIH and further enhance the body's capabilities through BFR. Studies have compared EIH at low- and high-intensity settings utilizing BFR with both resistance and aerobic exercise. The results of these studies show comparable beta-endorphin levels with high-intensity exercise without BFR and low-intensity exercise with BFR. Low-intensity training with BFR had greater local pain relief, perhaps indicating the promising effects of BFR in enhancing EIH. By reviewing the current literature on this topic, we hope that further progress can be made to better understand the mechanism behind BFR and its ability to enhance EIH. Currently, local metabolites are a major focus for the potential mechanism behind these effects. Mas-related G-protein-coupled receptors (Mrgprs) contribute to local pain pathways via mast cell degranulation. Similarly, chemokine receptor 2/chemokine ligand 2 (CCR2/CCL2) triggers mast cell degranulation and inflammation-induced pain. Finally, pain-reducing effects have been linked to anti-inflammatory IL-10 signaling and anaerobic metabolites via transient receptor potential vanilloid 1 (TRPV1). Through a better understanding of these metabolites and their mechanisms, it is possible to further exploit the use of BFR to not only serve athletes recovering from injury but also apply this information to better serve all patients.
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Affiliation(s)
- Giovanni A Cervini
- Biomedical Sciences, Liberty University College of Osteopathic Medicine, Lynchburg, USA
| | - Matthew Rice
- Biomedical Sciences, Liberty University College of Osteopathic Medicine, Lynchburg, USA
| | - Jeffrey L Jasperse
- Biomedical Sciences, Liberty University College of Osteopathic Medicine, Lynchburg, USA
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Khan J, Singer SR, Young A, Tanaiutchawoot N, Kalladka M, Mupparapu M. Pathogenesis and Differential Diagnosis of Temporomandibular Joint Disorders. Dent Clin North Am 2023; 67:259-280. [PMID: 36965930 DOI: 10.1016/j.cden.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Temporomandibular disorders (TMDs) are an umbrella term including disorders of the temporomandibular joint and muscles of the masticatory system. They are the most common nonodontogenic cause of pain in the orofacial region. A clear understanding of various conditions, underlying mechanisms, clinical presentation, and examination skills is required to effectively diagnose and manage these patients.
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Affiliation(s)
- Junad Khan
- Orofacial Pain and TMJD, Eastman Institute for Oral Health, 625 Elmwood Avenue, Rochester, NY 14620, USA.
| | - Steven R Singer
- Department of Diagnostic Sciences Division of Oral & Maxillofacial Radiology, Rutgers School of Dental Medicine, 110 Bergen Street | PO Box 1709, Newark, NJ 07101-1709, USA
| | - Andrew Young
- Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - Naruthorn Tanaiutchawoot
- Department of Diagnostic Sciences Division of Oral & Maxillofacial Radiology, Rutgers School of Dental Medicine, 110 Bergen Street | PO Box 1709, Newark, NJ 07101-1709, USA
| | - Mythili Kalladka
- Orofacial Pain and TMJD, Eastman Institute for Oral Health, 625 Elmwood Avenue, Rochester, NY 14620, USA
| | - Mel Mupparapu
- Penn Dental Medicine, 240 S 40th Street, Philadelphia, PA 19104, USA
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Khan J, Wang Q, Korczeniewska OA, McNeil R, Ren Y, Benoliel R, Eliav E. Response profile in a rat model of exercise-induced hypoalgesia is associated with duloxetine, pregabalin and diclofenac effect on constriction-induced neuropathy. Eur J Pain 2023; 27:129-147. [PMID: 36198034 DOI: 10.1002/ejp.2044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 09/28/2022] [Accepted: 10/03/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Exercise is a known trigger of the inhibitory pain modulation system and its analgesic effect is termed exercise-induced hypoalgesia (EIH). Previous studies have demonstrated that rats with deficient analgesic response following exercise develop more significant hypersensitivity following nerve injury compared to rats with substantial analgesic response following exercise. OBJECTIVES A rat model of EIH as an indicator of the pain inhibitory system's efficiency was used to explore the association between EIH profiles and the effect of pharmacotherapy on rat's neuropathic pain. METHODS EIH profiles were assessed by evaluating paw responses to mechanical stimuli before and after exercise on a rotating rod. Rats with a reduction of ≤33% in responses were classified as low EIH and those with ≥67% as high EIH. Low and high EIH rats underwent sciatic nerve chronic constriction injury (CCI). Paw responses to mechanical stimuli were measured at baseline, following CCI, and after treatment with diclofenac, duloxetine or pregabalin. In a different group of low and high EIH rats, EIH was measured before and following treatment with the same medications. RESULTS Low EIH rats developed more significant hypersensitivity following CCI. Duloxetine and pregabalin successfully reduced hypersensitivity, although significantly more so in low EIH rats. Diclofenac had limited effects, and only on low EIH rats. Four days of duloxetine administration transformed low EIH rats' profiles to high EIH. CONCLUSIONS The findings of this study suggest that EIH profiles in rats can not only predict the development of hypersensitivity following injury but may also support targeted pharmacological treatment. SIGNIFICANCE Exercise is a known trigger of the inhibitory pain modulation. Rats with deficient analgesic response following exercise develop more significant hypersensitivity following nerve injury. Pain modulation profiles in rats can also support targeted pharmacological treatment; rats with deficient analgesic response following exercise benefit more from treatment with duloxetine and gabapentin. Treatment with duloxetine can improve pain modulation profile.
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Affiliation(s)
- Junad Khan
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York, USA
| | - Qian Wang
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York, USA
| | | | | | - Yanfang Ren
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York, USA
| | - Rafael Benoliel
- Rutgers School of Dental Medicine, Rutgers university, Newark, New Jersey, USA
| | - Eli Eliav
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York, USA
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da Costa MS, Luft C, Sbruzzi M, de Oliveira JR, Donadio MVF. Impact of maternal physical exercise on inflammatory and hypothalamic-pituitary-adrenal axis markers in the brain and lungs of prenatally stressed neonatal mice. Dev Psychobiol 2022; 64:e22330. [PMID: 36282762 DOI: 10.1002/dev.22330] [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: 05/03/2022] [Revised: 08/11/2022] [Accepted: 08/29/2022] [Indexed: 01/27/2023]
Abstract
This study aimed to evaluate the effects of maternal exercise on alterations induced by prenatal stress in markers of the inflammatory process and the hypothalamic-pituitary-adrenal axis in the brain and lungs of neonatal mice. Female Balb/c mice were divided into three groups: control, prenatal restraint stress, prenatal restraint stress and physical exercise before and during the gestational period. On day 0 (PND0) and 10 (PND10), mice were euthanized for brain and lung analyses. The gene expression of GR, MR, IL-6, IL-10, and TNF in the brain and lungs and the protein expression of MMP-2 in the lungs were analyzed. Maternal exercise reduced IL-6 and IL-10 gene expression in the brain of PND0 mice. Prenatal stress and maternal exercise decreased GR, MR, IL-6, and TNF gene expression in the lungs of PND0 mice. In the hippocampus of PND10 females, exercise inhibited the effects of prenatal stress on the expression of MR, IL-6, and IL-10. In the lungs of PND10 females, exercise prevented the decrease in GR expression caused by prenatal stress. In the hippocampus and lungs of PND10 males, prenatal stress decreased GR gene expression. Our findings confirm the effects induced by prenatal stress and demonstrate that physical exercise before and during the gestational period may have a protective role on inflammatory changes.
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Affiliation(s)
- Mariana Severo da Costa
- Laboratory of Pediatric Physical Activity, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Laboratory of Cellular Biophysics and Inflammation, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Carolina Luft
- Laboratory of Pediatric Physical Activity, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Laboratory of Cellular Biophysics and Inflammation, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Department of Psychology, Brock University, St. Catharines, Ontario, Canada
| | - Mariana Sbruzzi
- Laboratory of Pediatric Physical Activity, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Laboratory of Cellular Biophysics and Inflammation, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Jarbas Rodrigues de Oliveira
- Laboratory of Cellular Biophysics and Inflammation, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Márcio Vinícius Fagundes Donadio
- Laboratory of Pediatric Physical Activity, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Laboratory of Cellular Biophysics and Inflammation, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Department of Physiotherapy, Facultad de Medicina y Ciencias de la Salud, Universitat Internacional de Catalunya (UIC), Barcelona, Spain
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Qin HJ, Li H, Chen JZ, Zhang KR, Zhao XQ, Qin JQ, Yu B, Yang J. Artificial nerve graft constructed by coculture of activated Schwann cells and human hair keratin for repair of peripheral nerve defects. Neural Regen Res 2022; 18:1118-1123. [PMID: 36255001 PMCID: PMC9827759 DOI: 10.4103/1673-5374.355817] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Studies have shown that human hair keratin (HHK) has no antigenicity and excellent mechanical properties. Schwann cells, as unique glial cells in the peripheral nervous system, can be induced by interleukin-1β to secrete nerve growth factor, which promotes neural regeneration. Therefore, HHK with Schwann cells may be a more effective approach to repair nerve defects than HHK without Schwann cells. In this study, we established an artificial nerve graft by loading an HHK skeleton with activated Schwann cells. We found that the longitudinal HHK microfilament structure provided adhesion medium, space and direction for Schwann cells, and promoted Schwann cell growth and nerve fiber regeneration. In addition, interleukin-1β not only activates Schwann cells, but also strengthens their activity and increases the expression of nerve growth factors. Activated Schwann cells activate macrophages, and activated macrophages secrete interleukin-1β, which maintains the activity of Schwann cells. Thus, a beneficial cycle forms and promotes nerve repair. Furthermore, our studies have found that the newly constructed artificial nerve graft promotes the improvements in nerve conduction function and motor function in rats with sciatic nerve injury, and increases the expression of nerve injury repair factors fibroblast growth factor 2 and human transforming growth factor B receptor 2. These findings suggest that this artificial nerve graft effectively repairs peripheral nerve injury.
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Affiliation(s)
- Han-Jun Qin
- Department of Orthopedics, Nanfang Hospital, Southern Medical University; Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Hang Li
- Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Jun-Ze Chen
- Department of Orthopedics, Baiyun Branch of Southern Hospital, Guangzhou, Guangdong Province, China
| | - Kai-Rui Zhang
- Department of Orthopedics, Nanfang Hospital, Southern Medical University; Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Xing-Qi Zhao
- Department of Orthopedics, Nanfang Hospital, Southern Medical University; Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Jian-Qiang Qin
- Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Bin Yu
- Department of Orthopedics, Nanfang Hospital, Southern Medical University; Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China,Correspondence to: Jun Yang, ; Bin Yu, .
| | - Jun Yang
- Department of Orthopedics, Nanfang Hospital, Southern Medical University; Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China,Department of Orthopedics, The 74th Group Military Hospital of PLA, Guangzhou, Guangdong Province, China,Correspondence to: Jun Yang, ; Bin Yu, .
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Exercise Reduces Pain Behavior and Pathological Changes in Dorsal Root Ganglia Induced by Systemic Inflammation in Mice. Neurosci Lett 2022; 778:136616. [DOI: 10.1016/j.neulet.2022.136616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/11/2022] [Accepted: 04/01/2022] [Indexed: 11/23/2022]
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Wang Y, Wu Z, Wang D, Huang C, Xu J, Liu C, Yang C. Muscle-brain communication in pain: The key role of myokines. Brain Res Bull 2021; 179:25-35. [PMID: 34871710 DOI: 10.1016/j.brainresbull.2021.11.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/24/2021] [Accepted: 11/28/2021] [Indexed: 12/24/2022]
Abstract
Pain is the most common reason for a physician visit, which accounts for a considerable proportion of the global burden of disease and greatly affects patients' quality of life. Therefore, there is an urgent need to identify new therapeutic targets involved in pain. Exercise-induced hypoalgesia (EIH) is a well known phenomenon observed worldwide. However, the available evidence demonstrates that the mechanisms of EIH remain unclear. One of the most accepted hypotheses has been the activation of several endogenous systems in the brain. Recently, the concept that the muscle acts as a secretory organ has attracted increasing attention. Proteins secreted by the muscle are called myokines, playing a critical role in communicating with other organs, such as the brain. This review will focus on several myokines and discuss their roles in EIH.
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Affiliation(s)
- Yuanyuan Wang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Zifeng Wu
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Di Wang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Chaoli Huang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China; State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Nanjing University, Nanjing 210061, China
| | - Jiali Xu
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Cunming Liu
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
| | - Chun Yang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
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