1
|
Ghanbari A, Ghasemi S, Khaleghian A. Effects of swimming exercise on neuropathic pain in a rat model: role of glutamate. Neurol Res 2024; 46:330-338. [PMID: 38323336 DOI: 10.1080/01616412.2024.2313901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 01/30/2024] [Indexed: 02/08/2024]
Abstract
OBJECTIVE The pain-reducing effects of the exercise were exerted through different mechanisms. Knowing more clear mechanisms helps to find more approach that is therapeutic. The objective of the present study is the evaluation of cerebrospinal fluid (CSF) glutamate level alteration in neuropathic pain rats and whether physical activity could modulate it. METHODS In the present study 104 male Wistar rats weighing 180-220 g were randomly divided into 4 groups (Sham, Sham + Exe, Neuropathy, and Neuropathy + Exe) which in turn each group subdivided into 4 groups according to time points for behavioral testing and CSF sampling (Baseline, 2 weeks, 3 weeks, and 4 weeks). To induction of neuropathy (by chronic constriction injury,), after anesthetizing with a mixture of ketamine (80 mg/kg) and xylazine (10 mg/kg), the animal's right sciatic nerve was exposed and was ligated using four movable catgut chromic suture 4/0. The exercise protocol included 25 min of daily swimming, 5 days a week for 4 weeks. Thermal hyperalgesia and mechanical tactile threshold were detected using the plantar test and Von Frey filaments, respectively. CSF glutamate level was determined using high-performance liquid chromatography. RESULTS Findings indicated that mechanical and thermal thresholds significantly (p < 0.01, p < 0.05 respectively) decreased in the neuropathy group against that in sham groups. On the other hand, exercise significantly increased mechanical tactile threshold (p < 0.0012) and thermal threshold (p < 0.05) compared to the neuropathy group. Moreover, CSF glutamate level prominently (p < 0.01) was increased in the neuropathy group compared to the sham group, and swimming exercise significantly (p < 0.001) reduced it. IN CONCLUSION The present findings provide new evidence showing that medium-intensity swimming exercise attenuates pain-like behaviors in neuropathic pain animals, which is possibly due to decreasing CSF glutamate level and its neurotransmission.
Collapse
Affiliation(s)
- Ali Ghanbari
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
| | - Sahar Ghasemi
- Student Research Committee, Semnan University of Medical Sciences, Semnan, Iran
| | - Ali Khaleghian
- Department of Biochemistry, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| |
Collapse
|
2
|
Wakaizumi K, Shinohara Y, Kawate M, Matsudaira K, Oka H, Yamada K, Jabakhanji R, Baliki MN. Exercise effect on pain is associated with negative and positive affective components: A large-scale internet-based cross-sectional study in Japan. Sci Rep 2024; 14:7649. [PMID: 38561418 PMCID: PMC10985089 DOI: 10.1038/s41598-024-58340-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 03/27/2024] [Indexed: 04/04/2024] Open
Abstract
Pain is a global health problem that leads to sedentary behavior and tends to cause negative emotion. In contrast, exercise is widely recommended for a health promotion, while pain often worsens with physical activity. Although exercise therapy is often prescribed to people with pain, the mechanisms of exercise effect on pain remains unclear. In this study, we tried to identify a universal association factor between regular exercise and pain intensity utilizing a cross-sectional web-based survey involving 52,353 adult participants from a large national study conducted in Japan. Using principal component analysis, we uncovered a mediation model of exercise effect on pain through psychological components. Analyses were performed in half of the population with pain (n = 20,330) and validated in the other half (n = 20,330), and showed that high-frequency exercise had a significant association with reduction in pain intensity. We also found Negative Affect and Vigor, two psychological components, are fully associating the exercise effect on pain (indirect effect = - 0.032, p < 0.001; association proportion = 0.99) with a dose-dependent response corresponding to the frequency of exercise. These findings were successfully validated (indirect effect of high-frequency exercise = - 0.028, p < 0.001; association proportion = 0.85). Moreover, these findings were also identified in subpopulation analyses of people with low back, neck, knee pain, and the tendency of the exercise effect on pain was increased with older people. In conclusion, the effect of exercise on pain is associated with psychological components and these association effects increased in parallel with the frequency of exercise habit regardless pain location.
Collapse
Affiliation(s)
- Kenta Wakaizumi
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582, Japan.
- Interdisciplinary Pain Center, Keio University Hospital, Tokyo, Japan.
| | - Yuta Shinohara
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582, Japan
- Interdisciplinary Pain Center, Keio University Hospital, Tokyo, Japan
| | - Morihiko Kawate
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582, Japan
- Interdisciplinary Pain Center, Keio University Hospital, Tokyo, Japan
| | - Ko Matsudaira
- Department of Pain Medicine, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Hiroyuki Oka
- Division of Musculoskeletal AI System Development, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keiko Yamada
- Pain Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Rami Jabakhanji
- Shirley Ryan AbilityLab, Chicago, IL, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - Marwan N Baliki
- Shirley Ryan AbilityLab, Chicago, IL, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
| |
Collapse
|
3
|
Liu W, Wang W, Wang Z, Xing Y. Ventral tegmental area dopaminergic circuits participates in stress-induced chronic postsurgical pain in male mice. BMC Neurosci 2024; 25:3. [PMID: 38195391 PMCID: PMC10775611 DOI: 10.1186/s12868-023-00842-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/18/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Chronic postsurgical pain (CPP) markedly impairs patients' quality of life. Research has shown that chronic stress may extend incisional nociception in male mice. Dopaminergic (DAergic) neurons in the ventral tegmental area (VTA) are integral to stress-related mental disorders (including major depressive disorder, anxiety disorders, and PTSD) and pain. However, the impact of chronic social defeat stress (CSDS) on mesolimbic dopamine (DA) transmission in the development of CPP is yet to be established. It remains uncertain whether the dopamine signals in the rostral anterior cingulate cortex (rACC), which regulate pain, derive from the VTA. This study aims to explore the role of VTA-rACC dopaminergic circuits in a mouse model of CPP induced by CSDS. METHODS We conducted CSDS on C57BL/6 J wild-type male mice (n = 12-16 mice/group) and DAT-cre male mice (n = 10-12 mice/group). After 10 days of CSDS, a left posterior plantar incision was made to establish a mouse model of CPP. Paw withdrawal thresholds (PWTs) were evaluated using Von-Frey fibre stimulation. The open field test (OFT) and elevated plus maze test (EPM) were used to assess pain-related negative emotions. We used immunofluorescence staining and Western Blot to analyse D1, D2, c-Fos, and TH expression. DAergic fibre projections in the VTA-rACC neural pathway were traced using retrograde tracing and immunofluorescence staining. Optogenetics and Chemogenetics were employed to manipulate DAergic neurons in the VTA and their axons in the rACC. RESULTS The ipsilateral PWTs in male C57BL/6 J mice significantly decreased after surgery, returning to baseline after seven days. Conversely, in CSDS mice, ipsilateral PWTs remained reduced for at least 30 days post-incision. A significant reduction in TH-positive neurons expressing c-Fos in the VTA of CPP mice was observed 15 days post-incision. Activating DAergic neurons significantly improved ipsilateral PWTs and locomotor performance in the OFT and EPM in CPP mice post-incision. Additionally, D1 expression in the rACC was found to decrease in CPP mice, and this reduction counteracted the increase in PWTs caused by activating DAergic neuron axon terminals in the rACC. CONCLUSION CSDS results in chronicity of postsurgical nociception and anxiety-like negative emotions, with alterations in DA transmission playing a role in CPP. Specific activation of DAergic neurons mitigates nociceptive responses and anxiety-like bahaviors, possibly mediated by D1 receptors in the rACC.
Collapse
Affiliation(s)
- Weizhen Liu
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
- The Academy of Medical Sciences of Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Wang Wang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
- The Academy of Medical Sciences of Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Ziliang Wang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
- The Academy of Medical Sciences of Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Ying Xing
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
| |
Collapse
|
4
|
Senba E. Is exercise therapy the first-line treatment for chronic pain? NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2024; 15:100154. [PMID: 38881820 PMCID: PMC11180369 DOI: 10.1016/j.ynpai.2024.100154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Affiliation(s)
- Emiko Senba
- Osaka Yukioka College of Health Science, 1-1-41 Sojiji, Ibaraki City, Osaka 567-0801, Japan
| |
Collapse
|
5
|
Senba E, Kami K. Exercise therapy for chronic pain: How does exercise change the limbic brain function? NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2023; 14:100143. [PMID: 38099274 PMCID: PMC10719519 DOI: 10.1016/j.ynpai.2023.100143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 08/31/2023] [Accepted: 08/31/2023] [Indexed: 12/17/2023]
Abstract
We are exposed to various external and internal threats which might hurt us. The role of taking flexible and appropriate actions against threats is played by "the limbic system" and at the heart of it there is the ventral tegmental area and nucleus accumbens (brain reward system). Pain-related fear causes excessive excitation of amygdala, which in turn causes the suppression of medial prefrontal cortex, leading to chronification of pain. Since the limbic system of chronic pain patients is functionally impaired, they are maladaptive to their situations, unable to take goal-directed behavior and are easily caught by fear-avoidance thinking. We describe the neural mechanisms how exercise activates the brain reward system and enables chronic pain patients to take goal-directed behavior and overcome fear-avoidance thinking. A key to getting out from chronic pain state is to take advantage of the behavioral switching function of the basal nucleus of amygdala. We show that exercise activates positive neurons in this nucleus which project to the nucleus accumbens and promote reward behavior. We also describe fear conditioning and extinction are affected by exercise. In chronic pain patients, the fear response to pain is enhanced and the extinction of fear memories is impaired, so it is difficult to get out of "fear-avoidance thinking". Prolonged avoidance of movement and physical inactivity exacerbate pain and have detrimental effects on the musculoskeletal and cardiovascular systems. Based on the recent findings on multiple bran networks, we propose a well-balanced exercise prescription considering the adherence and pacing of exercise practice. We conclude that therapies targeting the mesocortico-limbic system, such as exercise therapy and cognitive behavioral therapy, may become promising tools in the fight against chronic pain.
Collapse
Affiliation(s)
- Emiko Senba
- Department of Physical Therapy, Osaka Yukioka College of Health Science, 1-1-41 Sojiji, Ibaraki-City, Osaka 567-0801, Japan
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8509, Japan
| | - Katsuya Kami
- Department of Rehabilitation, Wakayama Faculty of Health Care Sciences, Takarazuka University of Medical and Health Care, 2252 Nakanoshima, Wakayama City, Wakayama 640-8392, Japan
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8509, Japan
| |
Collapse
|
6
|
Tanaka K, Kuzumaki N, Hamada Y, Suda Y, Mori T, Nagumo Y, Narita M. Elucidation of the mechanisms of exercise-induced hypoalgesia and pain prolongation due to physical stress and the restriction of movement. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2023; 14:100133. [PMID: 37274841 PMCID: PMC10239008 DOI: 10.1016/j.ynpai.2023.100133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 06/07/2023]
Abstract
Persistent pain signals cause brain dysfunction and can further prolong pain. In addition, the physical restriction of movement (e.g., by a cast) can cause stress and prolong pain. Recently, it has been recognized that exercise therapy including rehabilitation is effective for alleviating chronic pain. On the other hand, physical stress and the restriction of movement can prolong pain. In this review, we discuss the neural circuits involved in the control of pain prolongation and the mechanisms of exercise-induced hypoalgesia (EIH). We also discuss the importance of the mesolimbic dopaminergic network in these phenomena.
Collapse
Affiliation(s)
- Kenichi Tanaka
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Naoko Kuzumaki
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Yusuke Hamada
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Yukari Suda
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Tomohisa Mori
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Yasuyuki Nagumo
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Minoru Narita
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| |
Collapse
|
7
|
Matesanz-García L, Billerot C, Fundaun J, Schmid AB. Effect of Type and Dose of Exercise on Neuropathic Pain After Experimental Sciatic Nerve Injury: A Preclinical Systematic Review and Meta-Analysis. THE JOURNAL OF PAIN 2023; 24:921-938. [PMID: 36690283 DOI: 10.1016/j.jpain.2023.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/30/2022] [Accepted: 01/12/2023] [Indexed: 01/22/2023]
Abstract
This preclinical systematic review aimed to determine the effectiveness of different types and doses of exercise on pain behavior and biomarkers in preclinical models of focal neuropathic pain. We searched MEDLINE, EMBASE, Web of Science, PubMed, SCOPUS, CINAHL, and Cochrane library from inception to November 2022 for preclinical studies evaluating the effect of exercise compared to control interventions on neuropathic pain behavior after experimental sciatic nerve injury. If possible, data were meta-analyzed using random effect models with inverse-variance weighting. Thirty-seven studies were included and 26 meta-analyzed. Risk of bias (SYRCLE tool) remained unclear in most studies and reporting quality (CAMARADES) was variable. Exercise reduced mechanical (standardized mean differences [SMD] .53 (95% CI .31, .74), P = .0001, I2 = 0%, n = 364), heat (.32 (.07, .57), P = .01, I2 = 0%, n = 266) and cold hypersensitivity (.51 (.03, 1.0), P = .04, I2 = 0%, n = 90) compared to control interventions. No relationship was apparent between exercise duration or intensity and antinociception. Exercise modulated biomarkers related to different systems (eg, immune system, neurotrophins). Whereas firm conclusions are prevented by the use of male animals only, variable reporting quality and unclear risk of bias in many studies, our results suggest that aerobic exercise is a promising tool in the management of focal neuropathic pain. PERSPECTIVE: This systematic review and meta-analysis demonstrates that aerobic exercise reduces neuropathic pain-related behavior in preclinical models of sciatic nerve injury. This effect is accompanied by changes in biomarkers associated with inflammation and neurotrophins among others. These results could help to develop exercise interventions for patients with neuropathic pain.
Collapse
Affiliation(s)
- Luis Matesanz-García
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom; Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Escuela Internacional de Doctorado, Universidad Rey Juan Carlos, Alcorcón, Spain; Department of Physiotherapy, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, Madrid, Spain
| | - Clément Billerot
- Faculty of Biology, Euro-Mediterranean Master in Neurosciences and Biotechnology, Université de Bordeaux, Bordeaux, France
| | - Joel Fundaun
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Annina B Schmid
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom.
| |
Collapse
|
8
|
Agostinho M, Weissman Fogel I, Treister R. Time since onset might be of essence: A recommendation to assess the effects of combination of non-pharmacological neuromodulatory approaches at early stage since symptoms onset. Front Neurol 2023; 14:1115370. [PMID: 36793488 PMCID: PMC9923174 DOI: 10.3389/fneur.2023.1115370] [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: 12/03/2022] [Accepted: 01/11/2023] [Indexed: 01/31/2023] Open
Abstract
In the past decade researchers began to assess the potential beneficial effects of non-invasive brain stimulation (NIBS) combined with a behavioral task as a treatment approach for various medical conditions. Transcranial direct current stimulation (tDCS) applied to the motor cortex combined with another treatment approach has been assessed as analgesic treatment in neuropathic and non-neuropathic pain conditions, and was found to exert only modest pain relief. Our group results show that combined tDCS and mirror therapy dramatically reduced acute phantom limb pain intensity with long-lasting effects, potentially preventing pain chronification. A review of the scientific literature indicates that our approach differs from that of others: We applied the intervention at the acute stage of the disease, whereas other studies applied the intervention in patients whose disease had already been established. We suggest that the timing of administration of the combined intervention is critical. Unlike in patients with chronic painful condition, in which the maladaptive plasticity associated with pain chronification and chronicity is well-consolidated, early treatment at the acute pain stage may be more successful in counterbalancing the not-yet consolidated maladaptive plasticity. We encourage the research community to test our hypothesis, both in the treatment of pain, and beyond.
Collapse
Affiliation(s)
- Mariana Agostinho
- The Cheryl Spencer Department of Nursing, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel,Centre for Interdisciplinary Health Research, CIIS, Institute of Health Sciences, Universidade Católica Portuguesa, Lisbon, Portugal
| | - Irit Weissman Fogel
- Physical Therapy Department, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel
| | - Roi Treister
- The Cheryl Spencer Department of Nursing, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel,*Correspondence: Roi Treister ✉
| |
Collapse
|
9
|
Wakaizumi K, Reckziegel D, Jabakhanji R, Apkarian AV, Baliki MN. Influence of exercise on pain is associated with resting-state functional connections: A cross-sectional functional brain imaging study. NEUROBIOLOGY OF PAIN 2023; 13:100125. [PMID: 37025929 PMCID: PMC10070934 DOI: 10.1016/j.ynpai.2023.100125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/18/2023] [Accepted: 03/18/2023] [Indexed: 03/29/2023]
Abstract
Exercise is associated with lower prevalence and severity of pain, and is widely recommended for pain management. However, the mechanisms the exercise effect on pain remain unclear. In this study, we examined the association of exercise with pain and aimed to identify its neurobiological mediators. We utilized a baseline data of a clinical trial for people with low back pain. Participants reported pain intensity and exercise habit, as well as pain-related psychological and emotional assessments. We also obtained brain imaging data using a resting-state functional MRI and performed mediation analyses to identify brain regions mediating the exercise effect on pain. Forty-five people with low back pain (mean pain intensity = 59.6 and mean duration = 9.9 weeks) were included in this study. Participants with an exercise habit (n = 29) showed significant less pain compared to those without an exercise habit (n = 16). Mediation analysis using resting-state functional connectivity identified the left thalamus, right amygdala, and medial prefrontal cortex as statistical mediators of the exercise effect on pain (indirect effect = -0.460, 95% confidence interval = -0.767 to -0.153). In conclusion, our findings suggest that brain function of the specific regions is probably a neuro-mechanism of exercise alleviating pain.
Collapse
Affiliation(s)
- Kenta Wakaizumi
- Department of Anesthesiology, Keio University School of Medicine, Tokyo, Japan
- Shirley Ryan AbilityLab, Chicago, IL, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
- Corresponding author at: Department of Anesthesiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
| | - Diane Reckziegel
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
- Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - Rami Jabakhanji
- Shirley Ryan AbilityLab, Chicago, IL, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - A. Vania Apkarian
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
- Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, USA
- Department of Anesthesia, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - Marwan N. Baliki
- Shirley Ryan AbilityLab, Chicago, IL, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, USA
| |
Collapse
|
10
|
Derue H, Ribeiro-da-Silva A. Therapeutic exercise interventions in rat models of arthritis. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2023; 13:100130. [PMID: 37179770 PMCID: PMC10172998 DOI: 10.1016/j.ynpai.2023.100130] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023]
Abstract
Arthritis is the leading cause of musculoskeletal pain and disability worldwide. Nearly 50% of individuals over the age of 65 have arthritis, which contributes to limited function, articular pain, physical inactivity, and diminished quality of life. Therapeutic exercise is often recommended in clinical settings for patients experiencing arthritic pain, however, there is little practical guidance regarding the use of therapeutic exercise to alleviate arthritic musculoskeletal pain. Rodent models of arthritis allow researchers to control experimental variables, which cannot be done with human participants, providing an opportunity to test therapeutic approaches in preclinical models. This literature review provides a summary of published findings in therapeutic exercise interventions in rat models of arthritis as well as gaps in the existing literature. We reveal that preclinical research in this field has yet to adequately investigate the impact of experimental variables in therapeutic exercise including their modality, intensity, duration, and frequency on joint pathophysiology and pain outcomes.
Collapse
Affiliation(s)
- Hannah Derue
- Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada
| | - Alfredo Ribeiro-da-Silva
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada
- Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada
- Corresponding author at: Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada.
| |
Collapse
|
11
|
Hasegawa M, Piriyaprasath K, Otake M, Kamimura R, Saito I, Fujii N, Yamamura K, Okamoto K. Effect of daily treadmill running exercise on masseter muscle nociception associated with social defeat stress in mice. Eur J Oral Sci 2022; 130:e12882. [DOI: 10.1111/eos.12882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 05/23/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Mana Hasegawa
- Division of Oral Physiology Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
- Division of General Dentistry and Dental Clinical Education Unit Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Kajita Piriyaprasath
- Division of Oral Physiology Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
- Department of Restorative Dentistry Faculty of Dentistry Naresuan University Phitsanulok Thailand
| | - Masanori Otake
- Division of Orthodontics Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Rantaro Kamimura
- Division of Orthodontics Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Isao Saito
- Division of Orthodontics Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Noritaka Fujii
- Division of General Dentistry and Dental Clinical Education Unit Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Kensuke Yamamura
- Division of Oral Physiology Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| | - Keiichiro Okamoto
- Division of Oral Physiology Faculty of Dentistry and Graduate School of Medical and Dental Sciences Niigata University Niigata City Japan
| |
Collapse
|
12
|
Brain Mechanisms of Exercise-Induced Hypoalgesia: To Find a Way Out from "Fear-Avoidance Belief". Int J Mol Sci 2022; 23:ijms23052886. [PMID: 35270027 PMCID: PMC8911154 DOI: 10.3390/ijms23052886] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/27/2022] [Accepted: 03/03/2022] [Indexed: 12/04/2022] Open
Abstract
It is well known that exercise produces analgesic effects (exercise-induced hypoalgesia (EIH)) in animal models and chronic pain patients, but the brain mechanisms underlying these EIH effects, especially concerning the emotional aspects of pain, are not yet fully understood. In this review, we describe drastic changes in the mesocorticolimbic system of the brain which permit the induction of EIH effects. The amygdala (Amyg) is a critical node for the regulation of emotions, such as fear and anxiety, which are closely associated with chronic pain. In our recent studies using neuropathic pain (NPP) model mice, we extensively examined the association between the Amyg and EIH effects. We found that voluntary exercise (VE) activated glutamate (Glu) neurons in the medial basal Amyg projecting to the nucleus accumbens (NAc) lateral shell, while it almost completely suppressed NPP-induced activation of GABA neurons in the central nucleus of the Amyg (CeA). Furthermore, VE significantly inhibited activation of pyramidal neurons in the ventral hippocampus-CA1 region, which play important roles in contextual fear conditioning and the retrieval of fear memory. This review describes novel information concerning the brain mechanisms underlying EIH effects as a result of overcoming the fear-avoidance belief of chronic pain.
Collapse
|
13
|
Brett Whalen L, Zachary Wright W, Kundur P, Angadi S, Modesitt SC. Beneficial effects of exercise on chemotherapy-induced peripheral neuropathy and sleep disturbance: A review of literature and proposed mechanisms. Gynecol Oncol Rep 2022; 39:100927. [PMID: 35071723 PMCID: PMC8761687 DOI: 10.1016/j.gore.2022.100927] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/16/2021] [Accepted: 01/03/2022] [Indexed: 12/17/2022] Open
Abstract
Exercise counters chemotherapy-induced peripheral neuropathy and sleep disturbances. Exercise reduces inflammation, promotes neuroplasticity, modulates pain signaling. Exercise improves sleep disturbances by entraining circadian rhythmicity. Oncologists should learn how to prescribe exercise regimens for their patients.
The goal of this narrative review is to evaluate the literature regarding exercise training as a therapy to prevent or mitigate deleterious side effects of chemotherapy, specifically peripheral neuropathy and sleep disturbances and to make concrete recommendations for implementation for the practicing oncologist. A literature search was conducted for studies that included an exercise intervention to be implemented for patients undergoing or previously treated with chemotherapy along with an analysis of its effect on either chemotherapy-induced peripheral neuropathy (CIPN) or chemotherapy-induced sleep disturbances. Studies were subsequently analyzed and summarized in order to determine the overall promise of exercise as a therapy in this setting. Five studies met inclusion criteria to be assessed with regard to the effect of exercise on CIPN and eight were included for sleep disturbances. Exercise was found to be a significantly beneficial therapy in preventing, mitigating, or improving the symptoms of CIPN and sleep disturbances in cancer patients in the majority of studies evaluated. Exercise is an effective intervention and should be specifically prescribed concurrently with chemotherapy to maximize potential of avoiding these debilitating side effects, which significantly and negatively impact quality of life in cancer survivors.
Collapse
Affiliation(s)
- L. Brett Whalen
- University of Virginia School of Medicine, Charlottesville, VA, United States
- Corresponding author at: University of Virginia School of Medicine, 1215 Lee St, CVC 5144, Charlottesville, VA 22903, United States.
| | - W. Zachary Wright
- University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Priyanka Kundur
- University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Siddhartha Angadi
- Department of Kinesiology, School of Education and Human Development, University of Virginia, Charlottesville, VA, United States
| | - Susan C. Modesitt
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, School of Medicine, University of Virginia, Charlottesville, VA, United States
| |
Collapse
|
14
|
Ferrari LF, Pei J, Zickella M, Rey C, Zickella J, Ramirez A, Taylor NE. D2 Receptors in the Periaqueductal Gray/Dorsal Raphe Modulate Peripheral Inflammatory Hyperalgesia via the Rostral Ventral Medulla. Neuroscience 2021; 463:159-173. [PMID: 33826955 DOI: 10.1016/j.neuroscience.2021.03.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 11/19/2022]
Abstract
Dopamine neurons in the periaqueductal gray (PAG)/dorsal raphe are key modulators of antinociception with known supraspinal targets. However, no study has directly tested whether these neurons contribute to descending pain inhibition. We hypothesized that PAG dopamine neurons contribute to the analgesic effect of D-amphetamine via a mechanism that involves descending modulation via the rostral ventral medulla (RVM). Male C57BL/6 mice showed increased c-FOS expression in PAG dopamine neurons and a significant increase in paw withdrawal latency to thermal stimulation after receiving a systemic injection of D-amphetamine. Targeted microinfusion of D-amphetamine, L-DOPA, or the selective D2 agonist quinpirole into the PAG produced analgesia, while a D1 agonist, chloro APB, had no effect. In addition, inhibition of D2 receptors in the PAG by eticlopride prevented the systemic D-amphetamine analgesic effect. D-amphetamine and PAG D2 receptor-mediated analgesia were inhibited by intra-RVM injection of lidocaine or the GABAA receptor agonist muscimol, indicating a PAG-RVM signaling pathway in this model of analgesia. Finally, both systemic D-amphetamine and local PAG microinjection of quinpirole, inhibited inflammatory hyperalgesia induced by carrageenan. This hyperalgesia was transiently restored by intra-PAG injection of eticlopride, as well as RVM microinjection of muscimol. We conclude that D-amphetamine analgesia is partially mediated by descending inhibition and that D2 receptors in the PAG are responsible for this effect via modulating neurons that project to the RVM. These results further our understanding of the antinociceptive effects of dopamine and elucidate a mechanism by which clinically available dopamine modulators produce analgesia.
Collapse
Affiliation(s)
- Luiz F Ferrari
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States.
| | - JunZhu Pei
- Department of Biomedical Engineering, Florida International University, United States.
| | - Michael Zickella
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States
| | - Charles Rey
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States
| | - Jacqueline Zickella
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States
| | - Anna Ramirez
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States.
| | - Norman E Taylor
- Department of Anesthesiology, University of Utah School of Medicine, 30 N 1900 E, RM 3C444 SOM, Salt Lake City, UT 84132, United States.
| |
Collapse
|
15
|
Hayashi T, Akikawa R, Kawasaki K, Egawa J, Minamimoto T, Kobayashi K, Kato S, Hori Y, Nagai Y, Iijima A, Someya T, Hasegawa I. Macaques Exhibit Implicit Gaze Bias Anticipating Others' False-Belief-Driven Actions via Medial Prefrontal Cortex. Cell Rep 2021; 30:4433-4444.e5. [PMID: 32234478 DOI: 10.1016/j.celrep.2020.03.013] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/23/2019] [Accepted: 03/05/2020] [Indexed: 02/08/2023] Open
Abstract
The ability to infer others' mental states is essential to social interactions. This ability, critically evaluated by testing whether one attributes false beliefs (FBs) to others, has been considered to be uniquely hominid and to accompany the activation of a distributed brain network. We challenge the taxon specificity of this ability and identify the causal brain locus by introducing an anticipatory-looking FB paradigm combined with chemogenetic neuronal manipulation in macaque monkeys. We find spontaneous gaze bias of macaques implicitly anticipating others' FB-driven actions. Silencing of the medial prefrontal neuronal activity with inhibitory designer receptor exclusively activated by designer drugs (DREADDs) specifically eliminates the implicit gaze bias while leaving the animals' visually guided and memory-guided tracking abilities intact. Thus, neuronal activity in the medial prefrontal cortex could have a causal role in FB-attribution-like behaviors in the primate lineage, emphasizing the importance of probing the neuronal mechanisms underlying theory of mind with relevant macaque animal models.
Collapse
Affiliation(s)
- Taketsugu Hayashi
- Department of Psychiatry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan; Department of Physiology, Niigata University School of Medicine, Niigata, Japan
| | - Ryota Akikawa
- Department of Physiology, Niigata University School of Medicine, Niigata, Japan; Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Keisuke Kawasaki
- Department of Physiology, Niigata University School of Medicine, Niigata, Japan
| | - Jun Egawa
- Department of Psychiatry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Takafumi Minamimoto
- Functional Brain Imaging, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Kazuto Kobayashi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University, Fukushima, Japan
| | - Shigeki Kato
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University, Fukushima, Japan
| | - Yukiko Hori
- Functional Brain Imaging, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Yuji Nagai
- Functional Brain Imaging, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Atsuhiko Iijima
- Graduate School of Science and Technology, Niigata University, Niigata, Japan; School of Health Sciences, Faculty of Medicine, Niigata University, Niigata, Japan; Interdisciplinary Program of Biomedical Engineering, Assistive Technology, and Art and Sports Sciences, Faculty of Engineering, Niigata University. Niigata, Japan
| | - Toshiyuki Someya
- Department of Psychiatry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
| | - Isao Hasegawa
- Department of Physiology, Niigata University School of Medicine, Niigata, Japan.
| |
Collapse
|
16
|
Leitzelar BN, Koltyn KF. Exercise and Neuropathic Pain: A General Overview of Preclinical and Clinical Research. SPORTS MEDICINE-OPEN 2021; 7:21. [PMID: 33751253 PMCID: PMC7984211 DOI: 10.1186/s40798-021-00307-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 02/11/2021] [Indexed: 12/14/2022]
Abstract
Neuropathic pain is a disease of the somatosensory system that is characterized by tingling, burning, and/or shooting pain. Medication is often the primary treatment, but it can be costly, thus there is an interest in understanding alternative low-cost treatments such as exercise. The following review includes an overview of the preclinical and clinical literature examining the influence of exercise on neuropathic pain. Preclinical studies support the hypothesis that exercise reduces hyperalgesia and allodynia in animal models of neuropathic pain. In human research, observational studies suggest that those who are more physically active have lower risk of developing neuropathic pain compared to those who are less active. Exercise studies suggest aerobic exercise training (e.g., 16 weeks); a combination of aerobic and resistance exercise training (e.g., 10–12 weeks); or high-intensity interval training (e.g., 15 weeks) reduces aspects of neuropathic pain such as worst pain over the past month, pain over the past 24 h, pain scores, or pain interference. However, not all measures of pain improve following exercise training (e.g., current pain, heat pain threshold). Potential mechanisms and future directions are also discussed to aid in the goal of understanding the role of exercise in the management of neuropathic pain. Future research using standardized methods to further understanding of the dose of exercise needed to manage neuropathic pain is warranted.
Collapse
Affiliation(s)
- Brianna N Leitzelar
- Department of Kinesiology, University of Wisconsin-Madison, 1300 University Ave., Madison, WI, 53706, USA
| | - Kelli F Koltyn
- Department of Kinesiology, University of Wisconsin-Madison, 1300 University Ave., Madison, WI, 53706, USA.
| |
Collapse
|
17
|
Lesnak JB, Sluka KA. Mechanism of exercise-induced analgesia: what we can learn from physically active animals. Pain Rep 2020; 5:e850. [PMID: 33490844 PMCID: PMC7808683 DOI: 10.1097/pr9.0000000000000850] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/26/2020] [Accepted: 07/31/2020] [Indexed: 12/29/2022] Open
Abstract
Physical activity has become a first-line treatment in rehabilitation settings for individuals with chronic pain. However, research has only recently begun to elucidate the mechanisms of exercise-induced analgesia. Through the study of animal models, exercise has been shown to induce changes in the brain, spinal cord, immune system, and at the site of injury to prevent and reduce pain. Animal models have also explored beneficial effects of exercise through different modes of exercise including running, swimming, and resistance training. This review will discuss the central and peripheral mechanisms of exercise-induced analgesia through different modes, intensity, and duration of exercise as well as clinical applications of exercise with suggestions for future research directions.
Collapse
Affiliation(s)
- Joseph B. Lesnak
- Department of Physical Therapy and Rehabilitation Sciences, University of Iowa, Iowa City, IA, USA
| | - Kathleen A. Sluka
- Department of Physical Therapy and Rehabilitation Sciences, University of Iowa, Iowa City, IA, USA
| |
Collapse
|
18
|
Phạm TL, Kim DW. Poly(lactic-co-glycolic acid) nanomaterial-based treatment options for pain management: a review. Nanomedicine (Lond) 2020; 15:1897-1913. [PMID: 32757701 DOI: 10.2217/nnm-2020-0114] [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: 12/13/2022] Open
Abstract
Neuropathic pain is one of the most intense types of chronic pain; it constitutes a pervasive complaint throughout the public health system. With few effective treatments, it remains a significant challenge. Commercially available drugs for neuropathic pain are still limited and have disappointing efficacy. Therefore, chronic neuropathic pain imposes a tremendous burden on patients' quality of life. Recently, the introduction and application of nanotechnology in multiple fields has accelerated the development of new drugs. This review highlights the application of poly(lactic-co-glycolic acid) nanomaterial-based vehicles for drug delivery and how they improve the therapeutic outcomes for neuropathic pain treatment. Finally, future developments for pain research and effective management are presented.
Collapse
Affiliation(s)
- Thuỳ Linh Phạm
- Department of Medical Science, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
- Department of Anatomy, Brain Research Institute, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
- Department of Histology & Embryology, Hai Phong University of Medicine & Pharmacy Hospital, Hai Phong, 042-12, Vietnam
| | - Dong Woon Kim
- Department of Medical Science, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
- Department of Anatomy, Brain Research Institute, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
| |
Collapse
|
19
|
Kuner R, Kuner T. Cellular Circuits in the Brain and Their Modulation in Acute and Chronic Pain. Physiol Rev 2020; 101:213-258. [PMID: 32525759 DOI: 10.1152/physrev.00040.2019] [Citation(s) in RCA: 135] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Chronic, pathological pain remains a global health problem and a challenge to basic and clinical sciences. A major obstacle to preventing, treating, or reverting chronic pain has been that the nature of neural circuits underlying the diverse components of the complex, multidimensional experience of pain is not well understood. Moreover, chronic pain involves diverse maladaptive plasticity processes, which have not been decoded mechanistically in terms of involvement of specific circuits and cause-effect relationships. This review aims to discuss recent advances in our understanding of circuit connectivity in the mammalian brain at the level of regional contributions and specific cell types in acute and chronic pain. A major focus is placed on functional dissection of sub-neocortical brain circuits using optogenetics, chemogenetics, and imaging technological tools in rodent models with a view towards decoding sensory, affective, and motivational-cognitive dimensions of pain. The review summarizes recent breakthroughs and insights on structure-function properties in nociceptive circuits and higher order sub-neocortical modulatory circuits involved in aversion, learning, reward, and mood and their modulation by endogenous GABAergic inhibition, noradrenergic, cholinergic, dopaminergic, serotonergic, and peptidergic pathways. The knowledge of neural circuits and their dynamic regulation via functional and structural plasticity will be beneficial towards designing and improving targeted therapies.
Collapse
Affiliation(s)
- Rohini Kuner
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany; and Department of Functional Neuroanatomy, Institute for Anatomy and Cell Biology, Heidelberg University, Heidelberg, Germany
| | - Thomas Kuner
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany; and Department of Functional Neuroanatomy, Institute for Anatomy and Cell Biology, Heidelberg University, Heidelberg, Germany
| |
Collapse
|
20
|
Cardenas-Rojas A, Pacheco-Barrios K, Giannoni-Luza S, Rivera-Torrejon O, Fregni F. Noninvasive brain stimulation combined with exercise in chronic pain: a systematic review and meta-analysis. Expert Rev Neurother 2020; 20:401-412. [PMID: 32130037 DOI: 10.1080/14737175.2020.1738927] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Background: The use of noninvasive brain stimulation (NIBS) combined with exercise could produce synergistic effects on chronic pain conditions. This study aims to evaluate the efficacy and safety of NIBS combined with exercise to treat chronic pain as well as to describe the parameters used to date in this combination.Methods: The search was carried out in Medline, Central, Scopus, Embase, and Pedro until November 2019. Randomized clinical trials (RCTs) and quasi-experimental studies reporting the use of noninvasive brain stimulation and exercise on patients with chronic pain were selected and revised.Results: The authors included eight studies (RCTs), reporting eight comparisons (219 participants). Authors found a significant and homogeneous pain decrease (ES: -0.62, 95% CI:-0.89 to -0.34; I2 = 0.0%) in favor of the combined intervention compared to sham NIBS + exercise, predominantly by excitatory (anodal tDCS/rTMS) motor cortex stimulation. Regarding NIBS techniques, the pooled effect sizes were significant for both tDCS (ES: -0.59, 95% CI: -0.89 to -0.29, I2 = 0.0%) and rTMS (ES: -0.76, 95% CI: -1.41 to -0.11, I2 = 0.0%).Conclusions: This meta-analysis suggests a significant moderate to large effects of the NIBS and exercise combination in chronic pain. The authors discuss the potential theoretical framework for this synergistic effect.
Collapse
Affiliation(s)
- Alejandra Cardenas-Rojas
- Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Boston, MA, USA
| | - Kevin Pacheco-Barrios
- Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Boston, MA, USA.,Unidad De Investigación Para La Generación Y Síntesis De Evidencias En Salud, Universidad San Ignacio De Loyola, Lima, Perú.,SYNAPSIS Mental Health and Neurology, Non-Profit Organization, Lima, Peru
| | - Stefano Giannoni-Luza
- Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Boston, MA, USA
| | | | - Felipe Fregni
- Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Boston, MA, USA
| |
Collapse
|
21
|
Sałat K, Furgała A, Sałat R. Interventional and preventive effects of aripiprazole and ceftriaxone used alone or in combination on oxaliplatin-induced tactile and cold allodynia in mice. Biomed Pharmacother 2019; 111:882-890. [PMID: 30841467 DOI: 10.1016/j.biopha.2019.01.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 01/03/2019] [Accepted: 01/03/2019] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Chemotherapy-induced peripheral neuropathy (CIPN) is a pharmacoresistant neurological complication induced by some antitumor drugs. This study aimed to assess antiallodynic properties of aripiprazole and ceftriaxone used alone or in combination to attenuate neuropathic pain related to CIPN caused by oxaliplatin. METHODS Neuropathic pain was induced in mice by a single intraperitoneal dose of oxaliplatin (10 mg/kg). Aripiprazole and ceftriaxone were used in a single- or repeated dosing protocol. Their antiallodynic activity was assessed using von Frey and cold plate tests on the day of oxaliplatin injection and after 7 days. The influence of aripiprazole and ceftriaxone on animals' locomotor activity and motor coordination was also assessed. RESULTS Single-dose and repeated-dose aripiprazole 10 mg/kg and ceftriaxone 200 mg/kg used alone and in combination attenuated early-phase and late-phase tactile allodynia in oxaliplatin-treated mice. Repeated administrations of ceftriaxone 200 mg/kg prevented the development of late-phase tactile allodynia. Both drugs showed no antiallodynic properties in the cold plate test. Single-dose aripiprazole 1 and 10 mg/kg but not its repeated administration significantly decreased locomotor activity of oxaliplatin-treated mice. Single-dose aripiprazole 1 and 10 mg/kg, aripiprazole 1 mg/kg + ceftriaxone 50 mg/kg and aripiprazole 1 mg/kg + ceftriaxone 200 mg/kg impaired motor coordination in the rotarod test. CONCLUSIONS In mice, neither ceftriaxone nor aripiprazole attenuated cold allodynia. Ceftriaxone alone could attenuate tactile allodynia caused by oxaliplatin without inducing motor adverse effects. Although the administration of aripiprazole reduced tactile allodynia, this effect seems to be limited considering severe motor deficits induced by this drug.
Collapse
Affiliation(s)
- Kinga Sałat
- Department of Pharmacodynamics, Chair of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna St., 30-688 Krakow, Poland.
| | - Anna Furgała
- Department of Pharmacodynamics, Chair of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna St., 30-688 Krakow, Poland
| | - Robert Sałat
- Faculty of Production Engineering, Warsaw University of Life Sciences, 164 Nowoursynowska St., 02-787 Warsaw, Poland
| |
Collapse
|
22
|
Li C, Liu S, Lu X, Tao F. Role of Descending Dopaminergic Pathways in Pain Modulation. Curr Neuropharmacol 2019; 17:1176-1182. [PMID: 31182003 PMCID: PMC7057207 DOI: 10.2174/1570159x17666190430102531] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 03/19/2019] [Accepted: 04/11/2019] [Indexed: 12/24/2022] Open
Abstract
Pain, especially when chronic, is a common reason patients seek medical care and it affects the quality of life and well-being of the patients. Unfortunately, currently available therapies for chronic pain are often inadequate because the neurobiological basis of such pain is still not fully understood. Although dopamine has been known as a neurotransmitter to mediate reward and motivation, accumulating evidence has shown that dopamine systems in the brain are also involved in the central regulation of chronic pain. Most importantly, descending dopaminergic pathways play an important role in pain modulation. In this review, we discuss dopamine receptors, dopaminergic systems in the brain, and the role of descending dopaminergic pathways in the modulation of different types of pain.
Collapse
Affiliation(s)
| | | | - Xihua Lu
- Address correspondence to these authors at the Feng Tao, 3302 Gaston Ave., Dallas, TX 75246, USA; Tel: 1-214-828-8272; E-mail: and Xihua Lu, 127 Dongming Road,Zhengzhou, Henan 450008, China; Tel: 86-371-6558-7320; E-mail:
| | - Feng Tao
- Address correspondence to these authors at the Feng Tao, 3302 Gaston Ave., Dallas, TX 75246, USA; Tel: 1-214-828-8272; E-mail: and Xihua Lu, 127 Dongming Road,Zhengzhou, Henan 450008, China; Tel: 86-371-6558-7320; E-mail:
| |
Collapse
|
23
|
Abstract
Chemogenetic technologies enable selective pharmacological control of specific cell populations. An increasing number of approaches have been developed that modulate different signaling pathways. Selective pharmacological control over G protein-coupled receptor signaling, ion channel conductances, protein association, protein stability, and small molecule targeting allows modulation of cellular processes in distinct cell types. Here, we review these chemogenetic technologies and instances of their applications in complex tissues in vivo and ex vivo.
Collapse
Affiliation(s)
- Deniz Atasoy
- Department of Physiology, School of Medicine and Regenerative-Restorative Medicine Research Center (REMER), Istanbul Medipol University , Istanbul , Turkey ; and Janelia Research Campus, Howard Hughes Medical Institute , Ashburn, Virginia
| | - Scott M Sternson
- Department of Physiology, School of Medicine and Regenerative-Restorative Medicine Research Center (REMER), Istanbul Medipol University , Istanbul , Turkey ; and Janelia Research Campus, Howard Hughes Medical Institute , Ashburn, Virginia
| |
Collapse
|
24
|
Abstract
PURPOSE OF REVIEW Physical activity is increasingly recommended for chronic pain. In this review, we briefly survey recent, high-quality meta-analyses on the effects of exercise in human chronic pain populations, followed by a critical discussion of the rodent literature. RECENT FINDINGS Most meta-analytical studies on the effects of exercise in human chronic pain populations describe moderate improvements in various types of chronic pain, despite substantial variability in the outcomes reported in the primary literature. The most consistent findings suggest that while greater adherence to exercise programs produces better outcomes, there is minimal support for the superiority of one type of exercise over another. The rodent literature similarly suggests that while regular exercise reduces hypersensitivity in rodent models of chronic pain, exercise benefits do not appear to relate to either the type of injury or any particular facet of the exercise paradigm. Potential factors underlying these results are discussed, including the putative involvement of stress-induced analgesic effects associated with certain types of exercise paradigms. Exercise research using rodent models of chronic pain would benefit from increased attention to the role of stress in exercise-induced analgesia, as well as the incorporation of more clinically relevant exercise paradigms.
Collapse
Affiliation(s)
- Mark Henry Pitcher
- Pain and Integrative Neuroscience Laboratory, National Center for Complementary and Integrative Health, National Institutes of Health, Room 1E-420, 35A Convent Drive, Bethesda, MD, 20892, USA.
| |
Collapse
|
25
|
Kami K, Tajima F, Senba E. Activation of mesolimbic reward system via laterodorsal tegmental nucleus and hypothalamus in exercise-induced hypoalgesia. Sci Rep 2018; 8:11540. [PMID: 30069057 PMCID: PMC6070570 DOI: 10.1038/s41598-018-29915-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/20/2018] [Indexed: 11/08/2022] Open
Abstract
Ventral tegmental area (VTA) dopamine (DA) neurons are the primary source of dopamine in target structures that constitute the mesolimbic reward system. Previous studies demonstrated that voluntary wheel running (VWR) by neuropathic pain (NPP) model mice produces exercise-induced hypoalgesia (EIH), and that activation of mesolimbic reward system may lead to EIH. However, the neuronal mechanism by which the mesolimbic reward system is activated by VWR is unknown. Here, we found that VWR produces EIH effects and reverses the marked reduction in activated lateral VTA (lVTA)-DA neurons induced by NPP. The proportions of activated laterodorsal tegmental nucleus (LDT)-cholinergic and lateral hypothalamus-orexin neurons were significantly enhanced by VWR. Retrograde tracing and dual immunostaining revealed that VWR activates lVTA-projecting LDT-cholinergic/non-cholinergic and lateral hypothalamic area (LHA)-orexin/non-orexin neurons. Therefore, EIH effects may be produced, at least in part, by activation of the mesolimbic reward system via activation of LDT and LHA neurons.
Collapse
Affiliation(s)
- Katsuya Kami
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8509, Japan.
| | - Fumihiro Tajima
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8509, Japan
| | - Emiko Senba
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8509, Japan
- Department of Physical Therapy, Osaka Yukioka College of Health Science, 1-1-41 Sojiji, Ibaraki City, Osaka, 567-0801, Japan
| |
Collapse
|
26
|
Tashiro S, Nishimura S, Shinozaki M, Takano M, Konomi T, Tsuji O, Nagoshi N, Toyama Y, Liu M, Okano H, Nakamura M. The Amelioration of Pain-Related Behavior in Mice with Chronic Spinal Cord Injury Treated with Neural Stem/Progenitor Cell Transplantation Combined with Treadmill Training. J Neurotrauma 2018; 35:2561-2571. [PMID: 29790403 DOI: 10.1089/neu.2017.5537] [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] [Indexed: 12/17/2022] Open
Abstract
Progress in regenerative medicine is realizing the possibility of neural regeneration and functional recovery in spinal cord injury (SCI). Recently, rehabilitation has attracted much attention with respect to the synergistic promotion of functional recovery in combination with neural stem/progenitor cell (NS/PC) transplantation, even in the chronic refractory phase of SCI. Nevertheless, sensory disturbance is one of the most prominent sequelae, even though the effects of combination or single therapies have been investigated mostly in the context of motor recovery. To determine how combination therapy with treadmill training (TMT) and NS/PC transplantation affects the manifestation of thermal allodynia and tactile hyperalgesia in chronic phase SCI, four groups of SCI mice were used to assess pain-related behavior and histological changes: combined transplantation and TMT therapy, transplantation only, TMT only, and control groups. Thermal allodynia and coarse touch-pressure hyperalgesia exhibited significant recovery in the combined therapy group in comparison with controls, whereas there were no significant differences with fine touch-pressure hyperalgesia and motor function. Further investigation revealed fewer fibers remaining in the posterior funiculus, which contained the tracts associated with the two modalities showing less recovery; that is, touch-pressure hyperalgesia and motor function. A significant correlation was only observed between these two modalities. Although no remarkable histological recovery was found within the lesion epicenter, changes indicating amelioration of pain were observed in the lumbar enlargement of the combination therapy group. Our results suggest that amelioration of thermal allodynia and tactile hyperalgesia can be brought about by the additive effect of NS/PC transplantation and TMT. The degree of recovery seems dependent on the distribution of damage.
Collapse
Affiliation(s)
- Syoichi Tashiro
- 1 Department of Rehabilitation Medicine, Keio University School of Medicine , Tokyo, Japan
| | - Soraya Nishimura
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| | - Munehisa Shinozaki
- 3 Department of Physiology, Keio University School of Medicine , Tokyo, Japan
| | - Morito Takano
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| | - Tsunehiko Konomi
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan .,4 Department of Orthopaedic Surgery, Murayama Medical Center , National Hospital Organization, Tokyo, Japan
| | - Osahiko Tsuji
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| | - Narihito Nagoshi
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| | - Yoshiaki Toyama
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| | - Meigen Liu
- 1 Department of Rehabilitation Medicine, Keio University School of Medicine , Tokyo, Japan
| | - Hideyuki Okano
- 3 Department of Physiology, Keio University School of Medicine , Tokyo, Japan
| | - Masaya Nakamura
- 2 Department of Orthopaedic Surgery, Keio University School of Medicine , Tokyo, Japan
| |
Collapse
|
27
|
Belmonte LAO, Martins TC, Salm DC, Emer AA, de Oliveira BH, Mathias K, Goldim MP, Horewicz VV, Piovezan AP, Bobinski F, Petronilho F, Martins DF. Effects of Different Parameters of Continuous Training and High-Intensity Interval Training in the Chronic Phase of a Mouse Model of Complex Regional Pain Syndrome Type I. THE JOURNAL OF PAIN 2018; 19:1445-1460. [PMID: 30006271 DOI: 10.1016/j.jpain.2018.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/15/2018] [Accepted: 06/26/2018] [Indexed: 01/03/2023]
Abstract
This study evaluated the effects of continuous and interval running on a treadmill on mechanical hyperalgesia in an animal model of chronic postischemia pain and analyzed the mechanism of action of this effect. Different groups of male Swiss mice with chronic postischemia pain, induced by 3 hours of paw ischemia followed by reperfusion, ran on the treadmill in different protocols-the speed (10, 13, 16, or 19 m/min), duration (15, 30, or 60 minutes), weekly frequency (3 or 5 times), weekly increase in continuous and interval running speed-were tested. Mechanical hyperalgesia was evaluated by von Frey filament 7, 14, and 21 days after paw ischemia followed by reperfusion. On day 11 after paw ischemia followed by reperfusion and after 5 days of continuous and interval running, concentrations of cytokines, oxidative stress parameters, and extracellular signal-regulated kinase 1/2 and AKT 1/2/3 expression in the spinal cord were measured. The results showed that continuous running has an antihyperalgesic effect that depends on intensity and volume. Interval running has a longer-lasting antihyperalgesic effect than continuous running. The antihyperalgesic effect depends on intensity and volume in continuous running, and increasing speed maintains the antihyperalgesic effect in both protocols. In the spinal cord, both runs decreased tumor necrosis factor-α and interleukin-6 levels and increased interleukin-10. Both running protocols reduced oxidative damage in the spinal cord. Only interval running had lower concentrations of phosphorylated extracellular signal-regulated kinase 1/2 in the spinal cord. Interval running presented a great antihyperalgesic potential with more promising results than continuous running, which may be owing to the fact that the interval running can activate different mechanisms from those activated by continuous running. PERSPECTIVE: A minimum of .5-hour sessions of moderate to high intensity ≥3 times a week are essential parameters for continuous and interval running-induced analgesia. However, interval running was shown to be more effective than continuous running and can be an important adjuvant treatment to chronic pain.
Collapse
Affiliation(s)
- Luiz Augusto Oliveira Belmonte
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Thiago César Martins
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Daiana Cristina Salm
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Aline Armiliato Emer
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Bruna Hoffman de Oliveira
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Khiany Mathias
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Laboratory of Neurobiology of Inflammatory and Metabolic Processes, University of Southern Santa Catarina at Tubarão, SC, Brazil
| | - Mariana Pereira Goldim
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Laboratory of Neurobiology of Inflammatory and Metabolic Processes, University of Southern Santa Catarina at Tubarão, SC, Brazil
| | - Verônica Vargas Horewicz
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Anna Paula Piovezan
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Franciane Bobinski
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil
| | - Fabrícia Petronilho
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, University of Southern Santa Catarina at Tubarão, SC, Brazil
| | - Daniel Fernandes Martins
- Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil; Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça, Santa Catarina, Brazil.
| |
Collapse
|
28
|
Lee G, Grovey B, Furnish T, Wallace M. Medical Cannabis for Neuropathic Pain. Curr Pain Headache Rep 2018; 22:8. [DOI: 10.1007/s11916-018-0658-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
29
|
Analgesic Mechanisms of Antidepressants for Neuropathic Pain. Int J Mol Sci 2017; 18:ijms18112483. [PMID: 29160850 PMCID: PMC5713449 DOI: 10.3390/ijms18112483] [Citation(s) in RCA: 195] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 11/17/2017] [Accepted: 11/19/2017] [Indexed: 12/16/2022] Open
Abstract
Tricyclic antidepressants and serotonin noradrenaline reuptake inhibitors are used to treat chronic pain, such as neuropathic pain. Why antidepressants are effective for treatment of neuropathic pain and the precise mechanisms underlying their effects, however, remain unclear. The inhibitory effects of these antidepressants for neuropathic pain manifest more quickly than their antidepressive effects, suggesting different modes of action. Recent studies of animal models of neuropathic pain revealed that noradrenaline is extremely important for the inhibition of neuropathic pain. First, increasing noradrenaline in the spinal cord by reuptake inhibition directly inhibits neuropathic pain through α2-adrenergic receptors. Second, increasing noradrenaline acts on the locus coeruleus and improves the function of an impaired descending noradrenergic inhibitory system. Serotonin and dopamine may reinforce the noradrenergic effects to inhibit neuropathic pain. The mechanisms of neuropathic pain inhibition by antidepressants based mainly on experimental findings from animal models of neuropathic pain are discussed in this review.
Collapse
|
30
|
Kobayashi K, Inoue KI, Tanabe S, Kato S, Takada M, Kobayashi K. Pseudotyped Lentiviral Vectors for Retrograde Gene Delivery into Target Brain Regions. Front Neuroanat 2017; 11:65. [PMID: 28824385 PMCID: PMC5539090 DOI: 10.3389/fnana.2017.00065] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 07/17/2017] [Indexed: 01/09/2023] Open
Abstract
Gene transfer through retrograde axonal transport of viral vectors offers a substantial advantage for analyzing roles of specific neuronal pathways or cell types forming complex neural networks. This genetic approach may also be useful in gene therapy trials by enabling delivery of transgenes into a target brain region distant from the injection site of the vectors. Pseudotyping of a lentiviral vector based on human immunodeficiency virus type 1 (HIV-1) with various fusion envelope glycoproteins composed of different combinations of rabies virus glycoprotein (RV-G) and vesicular stomatitis virus glycoprotein (VSV-G) enhances the efficiency of retrograde gene transfer in both rodent and nonhuman primate brains. The most recently developed lentiviral vector is a pseudotype with fusion glycoprotein type E (FuG-E), which demonstrates highly efficient retrograde gene transfer in the brain. The FuG-E–pseudotyped vector permits powerful experimental strategies for more precisely investigating the mechanisms underlying various brain functions. It also contributes to the development of new gene therapy approaches for neurodegenerative disorders, such as Parkinson’s disease, by delivering genes required for survival and protection into specific neuronal populations. In this review article, we report the properties of the FuG-E–pseudotyped vector, and we describe the application of the vector to neural circuit analysis and the potential use of the FuG-E vector in gene therapy for Parkinson’s disease.
Collapse
Affiliation(s)
- Kenta Kobayashi
- Section of Viral Vector Development, National Institute for Physiological SciencesOkazaki, Japan.,SOKENDAI (The Graduate University for Advanced Studies)Hayama, Japan
| | - Ken-Ichi Inoue
- Systems Neuroscience Section, Department of Neuroscience, Primate Research Institute, Kyoto UniversityInuyama, Japan
| | - Soshi Tanabe
- Systems Neuroscience Section, Department of Neuroscience, Primate Research Institute, Kyoto UniversityInuyama, Japan
| | - Shigeki Kato
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of MedicineFukushima, Japan
| | - Masahiko Takada
- Systems Neuroscience Section, Department of Neuroscience, Primate Research Institute, Kyoto UniversityInuyama, Japan
| | - Kazuto Kobayashi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of MedicineFukushima, Japan
| |
Collapse
|
31
|
Senba E, Kami K. A new aspect of chronic pain as a lifestyle-related disease. NEUROBIOLOGY OF PAIN 2017; 1:6-15. [PMID: 31194049 PMCID: PMC6550110 DOI: 10.1016/j.ynpai.2017.04.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
Activation of mesolimbic dopamine system underlies exercise-induced hypoalgesia. Interaction between mesolimbic system and hypothalamus determines physical activity. Changing the lifestyle inactive to active may attenuate and prevent chronic pain.
Physical exercise has been established as a low-cost, safe, and effective way to manage chronic intractable pain. We investigated the underlying mechanisms of exercise-induced hypoalgesia (EIH) using a mouse model of neuropathic pain (NPP). Epigenetic changes in activated microglia and maintained GABA synthesis in the spinal dorsal horn may contribute to EIH. Voluntary exercise (VE), a strong reward for animals, also induced EIH, which may be due in part to the activation of dopamine (DA) neurons in the ventral tegmental area (VTA). VE increases the expression of pCREB in dopaminergic neurons in the VTA, which would enhance dopamine production, and thereby contributes to the activation of the mesolimbic reward system in NPP model mice. We demonstrated that neurons in the laterodorsal tegmental and pedunculopontine tegmental nuclei, a major input source of rewarding stimuli to the VTA, were activated by exercise. Chronic pain is at least partly attributed to sedentary and inactive lifestyle as indicated by the Fear-avoidance model. Therefore, chronic pain could be recognized as a lifestyle-related disease. Physical activity/inactivity may be determined by genetic/epigenetic and neural factors encoded in our brain. The hypothalamus and reward system is closely related in the axis of food intake, energy metabolism and physical activity. Understanding the interactions between the mesolimbic DA system and the hypothalamus that sense and regulate energy balance is thus of significant importance. For example, proopiomelanocortin neurons and melanocortin 4 receptors may play a role in connecting these two systems. Therefore, in a certain sense, chronic pain and obesity may share common behavioral and neural pathology, i.e. physical inactivity, as a result of inactivation of the mesolimbic DA system. Exercise and increasing physical activity in daily life may be important in treating and preventing chronic pain, a life-style related disease.
Collapse
Key Words
- CBP, chronic low back pain
- Chronic pain
- DA, dopamine
- Dopamine
- Exercise-induced hypoalgesia
- FM, fibromyalgia
- GABA, gamma-aminobutyric acid
- HDAC, histone deacetylase
- LDT, laterodorsal tegmental nucleus
- LH, lateral hypothalamus
- LHb, lateral habenula
- Laterodorsal tegmental nucleus
- NAc, nucleus accumbens
- NPP, neuropathic pain
- PPTg, pedunculopontine tegmental nucleus
- PSL, partial sciatic nerve ligation
- Physical activity/inactivity
- RMTg, rostromedial tegmental nucleus
- TH, tyrosine hydroxylase
- TMD, temporomandibular disorder
- VTA, ventral tegmental area
- VWR, voluntary wheel running
- Ventral tegmental area
- delta FosB, delta FBJ murine osteosarcoma viral
- mPFC, medial prefrontal cortex
- pCREB, phosphorylated cyclic AMP response element-binding protein
Collapse
Affiliation(s)
- Emiko Senba
- Department of Physical Therapy, Osaka Yukioka College of Health Science, 1-1-41 Sojiji, Ibaraki-City, Osaka 567-0801, Japan.,Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8509, Japan
| | - Katsuya Kami
- Department of Rehabilitation Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8509, Japan
| |
Collapse
|
32
|
Lazenka MF, Freitas KC, Henck S, Negus SS. Relief of Pain-Depressed Behavior in Rats by Activation of D1-Like Dopamine Receptors. J Pharmacol Exp Ther 2017; 362:14-23. [PMID: 28411257 DOI: 10.1124/jpet.117.240796] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/13/2017] [Indexed: 12/11/2022] Open
Abstract
Clinically significant pain often includes a decrease in both behavior and mesolimbic dopamine signaling. Indirect and/or direct dopamine receptor agonists may alleviate pain-related behavioral depression. To test this hypothesis, the present study compared effects of indirect and direct dopamine agonists in a preclinical assay of pain-depressed operant responding. Male Sprague-Dawley rats with chronic indwelling microelectrodes in the medial forebrain bundle were trained in an intracranial self-stimulation (ICSS) procedure to press a lever for pulses of electrical brain stimulation. Intraperitoneal injection of dilute lactic acid served as an acute noxious stimulus to depress ICSS. Intraperitoneal lactic acid-induced depression of ICSS was dose-dependently blocked by the dopamine transporter inhibitor methylphenidate and the D1-selective agonist SKF82958, but not by the D2/3-selective agonists quinpirole, pramipexole, or sumanirole. The antinociceptive effects of methylphenidate and SKF82958 were blocked by the D1-selective antagonist SCH39166. Acid-induced stimulation of a stretching response was evaluated in separate groups of rats, but all agonists decreased acid-stimulated stretching, and antagonism experiments were inconclusive due to direct effects of the antagonists when administered alone. Taken together, these results suggest that D1-receptor stimulation is both sufficient to block acid-induced depression of ICSS and necessary for methylphenidate antinociception in this procedure. Conversely, D2/3-receptor stimulation is not sufficient to relieve pain-depressed behavior. These results support the hypothesis that pain-related depression of dopamine D1 receptor signaling contributes to pain-related depression of behavior in rats. Additionally, these results support further consideration of indirect dopamine agonists and direct D1 receptor agonists as candidate treatments for pain-related behavioral depression.
Collapse
Affiliation(s)
- Matthew F Lazenka
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia
| | - Kelen C Freitas
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia
| | - Sydney Henck
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia
| | - S Stevens Negus
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, Virginia
| |
Collapse
|
33
|
Fatigue modulates dopamine availability and promotes flexible choice reversals during decision making. Sci Rep 2017; 7:535. [PMID: 28373651 PMCID: PMC5428685 DOI: 10.1038/s41598-017-00561-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 03/03/2017] [Indexed: 01/28/2023] Open
Abstract
During decisions, animals balance goal achievement and effort management. Despite physical exercise and fatigue significantly affecting the levels of effort that an animal exerts to obtain a reward, their role in effort-based choice and the underlying neurochemistry are incompletely known. In particular, it is unclear whether fatigue influences decision (cost-benefit) strategies flexibly or only post-decision action execution and learning. To answer this question, we trained mice on a T-maze task in which they chose between a high-cost, high-reward arm (HR), which included a barrier, and a low-cost, low-reward arm (LR), with no barrier. The animals were parametrically fatigued immediately before the behavioural tasks by running on a treadmill. We report a sharp choice reversal, from the HR to LR arm, at 80% of their peak workload (PW), which was temporary and specific, as the mice returned to choose the HC when the animals were successively tested at 60% PW or in a two-barrier task. These rapid reversals are signatures of flexible choice. We also observed increased subcortical dopamine levels in fatigued mice: a marker of individual bias to use model-based control in humans. Our results indicate that fatigue levels can be incorporated in flexible cost-benefits computations that improve foraging efficiency.
Collapse
|
34
|
Kobayashi K, Kato S, Kobayashi K. Genetic manipulation of specific neural circuits by use of a viral vector system. J Neural Transm (Vienna) 2017; 125:67-75. [DOI: 10.1007/s00702-016-1674-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/30/2016] [Indexed: 01/05/2023]
|