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Li L, Zou Y, Liu B, Yang R, Yang J, Sun M, Li Z, Xu X, Li G, Liu S, Greffrath W, Treede RD, Li G, Liang S. Contribution of the P2X4 Receptor in Rat Hippocampus to the Comorbidity of Chronic Pain and Depression. ACS Chem Neurosci 2020; 11:4387-4397. [PMID: 33284579 DOI: 10.1021/acschemneuro.0c00623] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The hippocampus is an important region for the interaction between depression and pain. Studies show that the P2X4 receptor plays key role in neuropathic pain. This work investigated the potential implication of the P2X4 receptor in the hippocampus in comorbidity of chronic pain and depression. The rat model induced by chronic constriction injury (CCI) plus unpredictable chronic mild stress (UCMS) was used in this study. Our data showed that CCI plus UCMS treatment resulted in abnormal changes in pain and depressive-like behaviors in the rat, accompanied by the upregulated expression of P2X4, NLRP3 (NOD-like receptor protein 3) inflammasome, and interleukin-1β and the activation of p38 MAPK in the hippocampus. The P2X4 antagonist 5-BDBD reversed these abnormal changes in the hippocampus, relieved hippocampal neuronal damage, and alleviated the abnormal pain and depressive-like behaviors in the CCI plus UCMS treated rats. These findings suggest that the P2X4 receptor in the hippocampus may mediate and significantly contribute to the pathological processes of comorbid pain and depression.
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Affiliation(s)
- Lin Li
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Yuting Zou
- Medical School of Nanchang University, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Baoe Liu
- Medical School of Nanchang University, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Runan Yang
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Jingjian Yang
- Queen Marie College of Nanchang University, Medical College of Nanchang University, Nanchang, 330008, People’s Republic of China
| | - Minghao Sun
- Medical School of Nanchang University, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Zijing Li
- Medical School of Nanchang University, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Xiumei Xu
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Guilin Li
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Shuangmei Liu
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Wolfgang Greffrath
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim, Heidelberg University, Mannheim 68167, Germany
| | - Rolf-Detlef Treede
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim, Heidelberg University, Mannheim 68167, Germany
| | - Guodong Li
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
| | - Shangdong Liang
- Neuropharmacology Laboratory of Physiology Department, Basic Medical College of Nanchang University, Nanchang 330006, People’s Republic of China
- Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease, Nanchang, Jiangxi 330006, People’s Republic of China
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LncRNA NEAT1/miR-128-3p/AQP4 axis regulating spinal cord injury-induced neuropathic pain progression. J Neuroimmunol 2020; 351:577457. [PMID: 33373887 DOI: 10.1016/j.jneuroim.2020.577457] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 11/29/2020] [Accepted: 12/06/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Neuropathic pain (NP) is the comorbidity in spinal cord injury(SCI), which is the hardest to cure. Non-coding RNA dysregulations are related to the development of NP. NEAT1(nuclear paraspeckle assembly transcript 1) is a new type of lncRNA. This study explores the role and specific mechanism of NEAT1 in SCI-mediated NP. METHODS Firstly, the NEAT1 expression in SCI rats and the control group was detected with RT-PCR to analyze the relationship between NEAT13 and NP symptoms. Then, SCI rats were intrathecally injected with NEAT13 overexpressing and knocking down lentiviruses. Afterward, ELISA was utilized to assess the expression of IL-6, IL-1β and TNFα in rats. Subsequently, immunohistochemistry was adopted to verify the activation of microglial cells. After that, bioinformatics analysis was employed to further predict the downstream target genes of NEAT1, while RT-PCR and Western blot were conducted to determine the relative expression of miR-128-3p and aquaporin-4(AQP4). Meanwhile, a dual-luciferase reporter assay was performed to further study the targeting relationship between NEAT1 and miR-128-3p, and miR-128-3p and AQP4. RESULTS SCI rats showed distinctly higher NEAT1 expression compared with that of the control group. ELISA experiment confirmed that the over-expression of NEAT1 enhanced the expression of IL-6, IL-1β, and TNFα in SCI rats. Other related mechanism studies revealed that NEAT13 targeted and inhibited miR-128-3p as its competing endogenous RNA (ceRNA), and enhanced AQP4 expression, while miR-128-3p targeted AQP4 to regulate its expression. SUMMARY NEAT1 affects AQP4 signaling pathway to alleviate the spinal cord injury-induced NP via promoting miR-128-3p expression.
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Bagdas D, Gul Z, Meade JA, Cam B, Cinkilic N, Gurun MS. Pharmacologic Overview of Chlorogenic Acid and its Metabolites in Chronic Pain and Inflammation. Curr Neuropharmacol 2020; 18:216-228. [PMID: 31631820 PMCID: PMC7327949 DOI: 10.2174/1570159x17666191021111809] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/03/2019] [Accepted: 10/16/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Natural phenolic compounds in medicinal herbs and dietary plants are antioxidants which play therapeutic or preventive roles in different pathological situations, such as oxidative stress and inflammation. One of the most studied phenolic compounds in the last decade is chlorogenic acid (CGA), which is a potent antioxidant found in certain foods and drinks. OBJECTIVE This review focuses on the anti-inflammatory and antinociceptive bioactivities of CGA, and the putative mechanisms of action are described. Ethnopharmacological reports related to these bioactivities are also reviewed. MATERIALS AND METHODS An electronic literature search was conducted by authors up to October 2019. Original articles were selected. RESULTS CGA has been shown to reduce inflammation and modulate inflammatory and neuropathic pain in animal models. CONCLUSION The consensus of the literature search was that systemic CGA may facilitate pain management via bolstering antioxidant defenses against inflammatory insults.
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Affiliation(s)
- Deniz Bagdas
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT, United States.,Yale Tobacco Center of Regulatory Science, Yale University, New Haven, CT, United States
| | - Zulfiye Gul
- Department of Pharmacology, Faculty of Medicine, Bahcesehir University, Istanbul, Turkey
| | - Julie A Meade
- Department of Pharmacology & Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA, United States
| | - Betul Cam
- Department of Physiology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - Nilufer Cinkilic
- Department of Biology, Faculty of Science and Arts, Uludag University, Bursa, Turkey
| | - Mine Sibel Gurun
- Department of Pharmacology, Faculty of Medicine, Uludag University, Bursa, Turkey
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Suo J, Wang M, Zhang P, Lu Y, Xu R, Zhang L, Qiu S, Zhang Q, Qian Y, Meng J, Zhu J. Siwei Jianbu decoction improves painful paclitaxel-induced peripheral neuropathy in mouse model by modulating the NF-κB and MAPK signaling pathways. Regen Med Res 2020; 8:2. [PMID: 33095154 PMCID: PMC7583579 DOI: 10.1051/rmr/200001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/07/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Paclitaxel, a commonly used chemotherapeutic agent, is usually associated with peripheral neuropathy. Paclitaxel induced peripheral neuropathy (PIPN) can be dose limiting and may have detrimental influence on patients' quality of life. However, the mechanism of PIPN remains unclear. Medicinal herbs and their formulas might offer neuronal protection with their multitarget and integrated benefits in chemotherapy-induced peripheral neuropathy (CIPN). Siwei Jianbu decoction (J12) is a classic formula of traditional Chinese medicine which can promote blood circulation and treat diabetic nephropathy in clinical with the symptoms of weakness and pain. Methods: The effects of J12 were treated in C57BL/6 mice before injected with Paclitaxel.Behaviour studies: Measurement of mechanical hyperalgesia, thermal nociception and cold allodynia. On the last day at the end of week 6, DRGs were obtained from mice for western blot and immunohistochemical analysis containing NF-κB, p-ERK1/2 and p-SAPK/JNK protein expression. Quantitative real-time polymerase chain reaction: mRNA expression of NF-κB, IL-1β and TNF-α was analyzed. Additionally, the blood samples collected from the eye socket of the mouse were prepared to examine the levels of NF-κB, TNF-α, IL-6 and IL-1β using ELISA assay kits. Results: Hypersensitivity tests and pathology analysis have demonstrated that J12 could improve paclitaxel-induced peripheral pain. J12 acts by inhibiting the activation of (C-Jun N-terminal kinases) JNK, (extracellular signal-regulated kinase) ERK1/2 phosphorylation in (Mitogen-activated protein kinases) MAPK signaling pathway and the nuclear factor-κB (NF-κB) in C57BL/6 mice model, J12 also inhibits the production of inflammatory cytokines including tumor necrosis factor α (TNF-α), interleukin 1β (IL-1β) and IL-6. Conclusion: The present study showed that J12 ameliorates paclitaxel-induced peripheral neuropathic pain.
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Affiliation(s)
- Jinshuai Suo
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Man Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Peng Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yuting Lu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Rong Xu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ling Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Siyan Qiu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Qiuyan Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yangyan Qian
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Meng
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Zhu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Department of pharmacy, Nanjing University of Chinese Medicine, Nanjing, China - Department of Neurology and Neuroscience, Johns Hopkins School of Medicine, Baltimore, USA
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Serum Soluble Interleukin-2 Receptor Does Not Differentiate Complex Regional Pain Syndrome from Other Pain Conditions in a Tertiary Referral Setting. Mediators Inflamm 2020; 2020:6259064. [PMID: 33061828 PMCID: PMC7539124 DOI: 10.1155/2020/6259064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 11/24/2022] Open
Abstract
Previously, we showed that serum soluble interleukin-2 receptor (sIL-2R) levels, a marker for T-cell activation, were higher in complex regional pain syndrome (CRPS) patients than in healthy controls, suggesting pathogenic T-cell activation in CRPS. Additionally, sIL-2R levels discriminated well between CRPS and healthy controls with a high sensitivity (90%) and specificity (89.5%), suggesting a possible role for sIL-2R in the diagnosis of CRPS. In order to further validate this marker in the diagnostic workup of CRPS, we conducted this prospective cohort study in which we determined sIL-2R levels in patients that were referred to our tertiary referral center with a suspicion of CRPS in a limb, and subsequently compared sIL-2R levels between the patients that were diagnosed with CRPS (CRPS group) and those who were not (no CRPS group). A group of anonymous blood bank donors were used as a healthy control group. Furthermore, we explored the relationship between sIL-2R and CRPS disease severity using the CRPS severity score. Median sIL-2R levels of both the CRPS group (2809.0 pg/ml; Q3-Q1: 3913.0-1589.0) and no CRPS group (3654.0 pg/ml; Q3-Q1: 4429.0-2095.5) were significantly higher than that of the control group (1515.0 pg/ml; Q3-Q1: 1880.0-1150.0): CRPS vs. controls, p < .001; no CRPS vs. controls, p < 0.001. Serum sIL-2R levels did not differ significantly between the CRPS and no CRPS group. A statistically significant negative correlation was observed between sIL-2R levels and the CRPS severity score (rs = −0.468, p = 0.024). Our results confirm our previous findings of higher sIL-2R levels in CRPS patients than in healthy controls. We further showed that serum sIL-2R cannot differentiate between CRPS and other pain conditions of a limb in a tertiary referral setting. Interestingly, a negative correlation was found between sIL-2R and CRPS disease severity; this finding warrants further research into the relationship between sIL-2R and CRPS disease severity.
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Liu N, Zhang GX, Niu YT, Wang Q, Zheng J, Yang JM, Sun T, Niu JG, Yu JQ. Anti-inflammatory and analgesic activities of indigo through regulating the IKKβ/IκB/NF-κB pathway in mice. Food Funct 2020; 11:8537-8546. [PMID: 33084638 DOI: 10.1039/c9fo02574j] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This study investigated the anti-inflammatory and analgesic activities of indigo in mice and explored the possible related mechanisms. Xylene-induced ear edema, carrageenan-induced paw edema, and acetic acid-induced vascular permeability tests were used in investigating the anti-inflammatory activities. The anti-nociceptive effects of indigo were assessed through acetic acid-induced writhing, hot plate test, and formalin test, and spontaneous locomotor activity and motor performance were evaluated. The mechanisms of activities of indigo were explored by evaluating the expression levels of IκB kinase (IKK)β, p-IKKβ, inhibitor κB (IκB)α, p-IκBα, p65 nuclear factor (NF)-kB, p-p65 NF-κB, cyclooxygenase-2 (COX-2), and inducible nitric oxide synthase (iNOS) through western blotting and the expression levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6), and prostaglandin E2 (PGE2) through enzyme-linked immunosorbent assay. The results showed that indigo significantly reduced xylene-induced ear edema, carrageenan-induced paw edema, and acetic acid-induced vascular permeation. In addition, indigo significantly inhibited nociception induced by acetic acid and formalin. However, the level of nociception was not decreased by indigo in the hot plate test, and indigo did not affect spontaneous locomotor activity and motor performance. The expression levels of p-IKKβ, p-IκBα, p65 NF-kB, p-p65 NF-κB, COX-2, iNOS, TNF-α, IL-1β, IL-6, and PGE2 decreased, whereas the expression level of IκBα increased obviously after indigo treatment. In conclusion, indigo exerts significant anti-inflammatory and analgesic activities in mice by inhibiting IKKβ phosphorylation and reducing the production of important pain mediators, such as PGE2 and COX-2, via the IKKβ/IκB/NF-κB pathway.
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Affiliation(s)
- Ning Liu
- School of Basic Medical Science, Ningxia Medical University, Yinchuan 750004, P. R. China
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Xie H, Chen Y, Du K, Wu W, Feng X. Puerarin alleviates vincristine-induced neuropathic pain and neuroinflammation via inhibition of nuclear factor-κB and activation of the TGF-β/Smad pathway in rats. Int Immunopharmacol 2020; 89:107060. [PMID: 33049496 DOI: 10.1016/j.intimp.2020.107060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022]
Abstract
Chemotherapy-induced neuropathic pain harms the quality of life patients. Vincristine is an often used chemotherapeutic drug that evokes neuralgia via inflammation. Puerarin (Pue) extracted from Puerariae Lobatae Radix has analgesic and anti-inflammatory effects; however, its possible effect and mechanism in vincristine (Vin)-induced neuropathic pain has not been investigated. The present research aimed to explore whether Pue could relieve chemotherapy-evoked neuropathic pain and the underlying mechanism actions. Rat neuropathic pain was established by intraperitoneal injection of vincristine. Pue was orally administered in two dose levels (25 or 50 mg/kg/d) for three weeks. The paw withdrawal latency and paw withdrawal threshold were performed to evaluate the pain behaviors. Inflammatory cytokines in the spinal cord and dorsal root ganglion were measured by ELISA kits. qRT-PCR, western blot, and immunofluorescence staining were employed to measure the level and expression feature of inflammatory cytokines. Our findings showed that Pue improved hyperalgesia and allodynia. Treatment with Pue restored the levels of tumor necrosis factor-α (TNF-α), and IL-1β and increased the levels of transforming growth factor-β (TGF-β), and interleukin-10 (IL-10). On the molecular level, treatment with Pue down-regulated the protein levels of IL-1β, and NF-κBp65 and up-regulated the protein levels of TGF-β, p-Smad2, and p-Smad3 (TGF-β/Smad) in the spinal cord and DRG. Immunofluorescence staining further demonstrated that Pue decreased the NF-κBp65 protein. Our findings imply that Pue relieved chemotherapy-induced neuropathic pain might be attributable to the suppression of inflammation cytokines. The anti-inflammation action of Pue might be associated with the activation of the TGF-β/Smad pathway, a novel mechanism exploring its prophylactic effect in vincristine-induced neuropathic pain.
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Affiliation(s)
- Hengtao Xie
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Yingying Chen
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Kairong Du
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Wei Wu
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Xiaobo Feng
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China.
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Wang YH, Li Y, Wang JN, Zhao QX, Jin J, Wen S, Wang SC, Sun T. Maresin 1 Attenuates Radicular Pain Through the Inhibition of NLRP3 Inflammasome-Induced Pyroptosis via NF-κB Signaling. Front Neurosci 2020; 14:831. [PMID: 32982664 PMCID: PMC7479972 DOI: 10.3389/fnins.2020.00831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 07/16/2020] [Indexed: 12/13/2022] Open
Abstract
Background The exposure of the nucleus pulposus (NP) causes an immune and inflammatory response, which is intrinsically linked to the pathogenesis of radicular pain. As a newly discovered pro-resolving lipid mediator, maresin 1 (MaR1) could exert powerful inflammatory resolution, neuroprotection, and analgesic activities. In the present research, the analgesic effect of MaR1 was observed. Then, the potential mechanism by which MaR1 attenuated radicular pain was also analyzed in a rat model. Methods Intrathecal administration of MaR1 (10 or 100 ng) was successively performed in a rat with non-compressive lumbar disk herniation for three postoperative days. Mechanical and thermal thresholds were determined to assess pain-related behavior from days 1 to 7 (n = 8/group). On day 7, the tissues of spinal dorsal horns from different groups were gathered to evaluate expression levels of inflammatory cytokines (IL-1β, IL-18, and TNF-α), the NLRP3 inflammasome and pyroptosis indicators (GSDMD, ASC, NLRP3, and Caspase-1), together with NF-κB/p65 activation (n = 6/group). TUNEL and PI staining were performed to further examine the process of pyroptosis. Results After intrathecal administration in the rat model, MaR1 exhibited potent analgesic effect dose-dependently. MaR1 significantly prompted the resolution of the increased inflammatory cytokine levels, reversed the up-regulated expression of the inflammasome and pyroptosis indicators, and reduced the cell death and the positive activation of NF-κB/p65 resulting from the NP application on the L5 dorsal root ganglion. Conclusion This study indicated that the activation of NLRP3 inflammasome and pyroptosis played a significant role in the inflammatory reaction of radicular pain. Also, MaR1 could effectively down-regulate the inflammatory response and attenuate pain by inhibiting NLRP3 inflammasome-induced pyroptosis via NF-κB signaling.
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Affiliation(s)
- Yi-Hao Wang
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Anesthesiology, Qingdao Municipal Hospital, Qingdao, China
| | - Yan Li
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jun-Nan Wang
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qing-Xiang Zhao
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jin Jin
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shuang Wen
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Si-Cong Wang
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Tao Sun
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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Behroozi Z, Ramezani F, Janzadeh A, Rahimi B, Nasirinezhad F. Platelet-rich plasma in umbilical cord blood reduces neuropathic pain in spinal cord injury by altering the expression of ATP receptors. Physiol Behav 2020; 228:113186. [PMID: 32980385 DOI: 10.1016/j.physbeh.2020.113186] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Neuropathic pain following injury or dysfunction of the peripheral or CNS is one of the most important medical challenges to treat. Humane platelet-rich plasma (HPRP), which is a rich source of growth factors, may be able to treat and reduce pain caused by spinal cord injury (SCI). In this study, the effect of HPRP on neuropathic pain caused by SCI was investigated. METHODS Sixty adult male Wistar rats were randomly divided into 6 groups: control, sham, SCI, vehicle (SCI+platelet-poor plasma), SCI+ PRP2day (injection 48 hrs after SCI) and SCI+PRP14day (injection 14 days after SCI). SCI was induced at the T12-T13 level. Behavioral tests were conducted weekly after injury for six weeks. Allodynia and hyperalgesia were assessed using acetone drops, plantar test and von Frey filament. Cavity size and the number of fibroblasts were determined by H&E stain, and the expression of mTOR, p-mTOR, P2×3R and P2Y4R were determined using the western blot technique. Data were analyzed using PRISM & SPSS software. RESULTS PRP injection showed a higher pain threshold in mechanical allodynia (p<0.0001), cold allodynia (p<0.0001) and thermal hyperalgesia (p<0.0001) than those in the spinal. Animals treated with PRP also reduced cavity size, fibroblast number, p-mTOR/mTOR ratio, and P2×3R expression, and increased P2Y4R expression. The difference between the two groups was not statistically significant. CONCLUSIONS The results showed that PRP reduced SCI-induced allodynia and hyperalgesia by regulating ATP signaling. Using HPRP can open a new window in the treatment of pain caused by damage to the nervous system.
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Affiliation(s)
- Zahra Behroozi
- Student research committee, Iran University of Medical Sciences, Tehran, Iran; Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Ramezani
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Atousa Janzadeh
- Radiation Biology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Behnaz Rahimi
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farinaz Nasirinezhad
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
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Electroacupuncture Modulates Spinal BDNF/TrκB Signaling Pathway and Ameliorates the Sensitization of Dorsal Horn WDR Neurons in Spared Nerve Injury Rats. Int J Mol Sci 2020; 21:ijms21186524. [PMID: 32906633 PMCID: PMC7555233 DOI: 10.3390/ijms21186524] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/16/2020] [Accepted: 09/02/2020] [Indexed: 12/12/2022] Open
Abstract
Neuropathic pain is more complex and severely affects the quality of patients’ life. However, the therapeutic strategy for neuropathic pain in the clinic is still limited. Previously we have reported that electroacupuncture (EA) has an attenuating effect on neuropathic pain induced by spared nerve injury (SNI), but its potential mechanisms remain to be further elucidated. In this study, we designed to determine whether BDNF/TrκB signaling cascade in the spinal cord is involved in the inhibitory effect of 2 Hz EA on neuropathic pain in SNI rats. The paw withdrawal threshold (PWT) of rats was used to detect SNI-induced mechanical hypersensitivity. The expression of BDNF/TrκB cascade in the spinal cord was evaluated by qRT-PCR and Western blot assay. The C-fiber-evoked discharges of wide dynamic range (WDR) neurons in spinal dorsal horn were applied to indicate the noxious response of WDR neurons. The results showed that 2 Hz EA significantly down-regulated the levels of BDNF and TrκB mRNA and protein expression in the spinal cord of SNI rats, along with ameliorating mechanical hypersensitivity. In addition, intrathecal injection of 100 ng BDNF, not only inhibited the analgesic effect of 2 Hz EA on pain hypersensitivity, but also reversed the decrease of BDNF and TrκB expression induced by 2 Hz EA. Moreover, 2 Hz EA obviously reduced the increase of C-fiber-evoked discharges of dorsal horn WDR neurons by SNI, but exogenous BDNF (100 ng) effectively reversed the inhibitory effect of 2 Hz EA on SNI rats, resulting in a remarkable improvement of excitability of dorsal horn WDR neurons in SNI rats. Taken together, these data suggested that 2 Hz EA alleviates mechanical hypersensitivity by blocking the spinal BDNF/TrκB signaling pathway-mediated central sensitization in SNI rats. Therefore, targeting BDNF/TrκB cascade in the spinal cord may be a potential mechanism of EA against neuropathic pain.
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Lees JG, White D, Keating BA, Barkl-Luke ME, Makker PGS, Goldstein D, Moalem-Taylor G. Oxaliplatin-induced haematological toxicity and splenomegaly in mice. PLoS One 2020; 15:e0238164. [PMID: 32877416 PMCID: PMC7467301 DOI: 10.1371/journal.pone.0238164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 08/11/2020] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Haematological toxicities occur in patients receiving oxaliplatin. Mild anaemia (grade 1-2) is a common side effect and approximately 90% of recipients develop measurable spleen enlargement. Although generally asymptomatic, oxaliplatin-induced splenomegaly is independently associated with complications following liver resection for colorectal liver metastasis and separately with poorer patient outcomes. Here, we investigated oxaliplatin-induced haematological toxicities and splenomegaly in mice treated with escalating dosages comparable to those prescribed to colorectal cancer patients. METHODS Blood was analysed, and smears assessed using Wright-Giemsa staining. Paw coloration was quantified as a marker of anaemia. Spleen weight and morphology were assessed for abnormalities relating to splenomegaly and a flow cytometry and multiplex cytokine array assessment was performed on splenocytes. The liver was assessed for sinusoidal obstructive syndrome. RESULTS Blood analysis showed dose dependent decreases in white and red blood cell counts, and significant changes in haematological indices. Front and hind paws exhibited dose dependent and dramatic discoloration indicative of anaemia. Spleen weight was significantly increased indicating splenomegaly, and red pulp tissue exhibited substantial dysplasia. Cytokines and chemokines within the spleen were significantly affected with temporal upregulation of IL-6, IL-1α and G-CSF and downregulation of IL-1β, IL-12p40, MIP-1β, IL-2 and RANTES. Flow cytometric analysis demonstrated alterations in splenocyte populations, including a significant reduction in CD45+ cells. Histological staining of the liver showed no evidence of sinusoidal obstructive syndrome but there were signs suggestive of extramedullary haematopoiesis. CONCLUSION Chronic oxaliplatin treatment dose dependently induced haematological toxicity and splenomegaly characterised by numerous physiological and morphological changes, which occurred independently of sinusoidal obstructive syndrome.
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Affiliation(s)
- Justin G. Lees
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
- * E-mail: (GM-T); (JGL)
| | - Daniel White
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
| | - Brooke A. Keating
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
| | - Mallory E. Barkl-Luke
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
| | - Preet G. S. Makker
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
| | - David Goldstein
- Prince of Wales Clinical School, The University of New South Wales, Sydney, New South Wales, Australia
| | - Gila Moalem-Taylor
- School of Medical Sciences, The University of New South Wales, Sydney, New South Wales, Australia
- * E-mail: (GM-T); (JGL)
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Sensory profiles and immune-related expression patterns of patients with and without neuropathic pain after peripheral nerve lesion. Pain 2020; 160:2316-2327. [PMID: 31145221 DOI: 10.1097/j.pain.0000000000001623] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this multicenter cross-sectional study, we determined sensory profiles of patients with (NL-1) and without neuropathic pain (NL-0) after nerve lesion and assessed immune-related systemic gene expression. Patients and matched healthy controls filled in questionnaires and underwent neurological examination, neurophysiological studies, quantitative sensory testing, and blood withdrawal. Neuropathic pain was present in 67/95 (71%) patients (NL-1). Tactile hyperalgesia was the most prominent clinical sign in NL-1 patients (P < 0.05). Questionnaires showed an association between neuropathic pain and the presence of depression, anxiety, and catastrophizing (P < 0.05 to P < 0.01). Neuropathic pain was frequently accompanied by other chronic pain (P < 0.05). Quantitative sensory testing showed ipsilateral signs of small and large fiber impairment compared to the respective contralateral side, with elevated thermal and mechanical detection thresholds (P < 0.001 to P < 0.05) and lowered pressure pain threshold (P < 0.05). Also, more loss of function was found in patients with NL-1 compared to NL-0. Pain intensity was associated with mechanical hyperalgesia (P < 0.05 to P < 0.01). However, quantitative sensory testing did not detect or predict neuropathic pain. Gene expression of peptidylglycine α-amidating monooxygenase was higher in NL patients compared with healthy controls (NL-1, P < 0.01; NL-0, P < 0.001). Also, gene expression of tumor necrosis factor-α was higher in NL-1 patients compared with NL-0 (P < 0.05), and interleukin-1ß was higher, but IL-10 was lower in NL-1 patients compared with healthy controls (P < 0.05 each). Our study reveals that nerve lesion presents with small and large nerve fiber dysfunction, which may contribute to the presence and intensity of neuropathic pain and which is associated with a systemic proinflammatory pattern.
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113
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Machelska H, Celik MÖ. Immune cell-mediated opioid analgesia. Immunol Lett 2020; 227:48-59. [PMID: 32814155 DOI: 10.1016/j.imlet.2020.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/07/2020] [Accepted: 08/12/2020] [Indexed: 12/18/2022]
Abstract
Pathological pain is regulated by a balance between pro-algesic and analgesic mechanisms. Interactions between opioid peptide-producing immune cells and peripheral sensory neurons expressing opioid receptors represent a powerful intrinsic pain control in animal models and in humans. Therefore, treatments based on general suppression of immune responses have been mostly unsuccessful. It is highly desirable to develop strategies that specifically promote neuro-immune communication mediated by opioids. Promising examples include vaccination-based recruitment of opioid-containing leukocytes to painful tissue and the local reprogramming of pro-algesic immune cells into analgesic cells producing and secreting high amounts of opioid peptides. Such approaches have the potential to inhibit pain at its origin and be devoid of central and systemic side effects of classical analgesics. In support of these concepts, in this article, we describe the functioning of peripheral opioid receptors, migration of opioid-producing immune cells to inflamed tissue, opioid peptide release, and the consequent pain relief. Conclusively, we provide clinical evidence and discuss therapeutic opportunities and challenges associated with immune cell-mediated peripheral opioid analgesia.
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Affiliation(s)
- Halina Machelska
- Department of Experimental Anesthesiology, Charité - Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Campus Benjamin Franklin, Berlin, Germany.
| | - Melih Ö Celik
- Department of Experimental Anesthesiology, Charité - Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Campus Benjamin Franklin, Berlin, Germany
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114
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Davoli-Ferreira M, de Lima KA, Fonseca MM, Guimarães RM, Gomes FI, Cavallini MC, Quadros AU, Kusuda R, Cunha FQ, Alves-Filho JC, Cunha TM. Regulatory T cells counteract neuropathic pain through inhibition of the Th1 response at the site of peripheral nerve injury. Pain 2020; 161:1730-1743. [PMID: 32701834 DOI: 10.1097/j.pain.0000000000001879] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The inflammatory/immune response at the site of peripheral nerve injury participates in the pathophysiology of neuropathic pain. Nevertheless, little is known about the local regulatory mechanisms underlying peripheral nerve injury that counteracts the development of pain. Here, we investigated the contribution of regulatory T (Treg) cells to the development of neuropathic pain by using a partial sciatic nerve ligation model in mice. We showed that Treg cells infiltrate and proliferate in the site of peripheral nerve injury. Local Treg cells suppressed the development of neuropathic pain mainly through the inhibition of the CD4 Th1 response. Treg cells also indirectly reduced neuronal damage and neuroinflammation at the level of the sensory ganglia. Finally, we identified IL-10 signaling as an intrinsic mechanism by which Treg cells counteract neuropathic pain development. These results revealed Treg cells as important inhibitory modulators of the immune response at the site of peripheral nerve injury that restrains the development of neuropathic pain. In conclusion, the boosting of Treg cell function/activity might be explored as a possible interventional approach to reduce neuropathic pain development after peripheral nerve damage.
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Affiliation(s)
- Marcela Davoli-Ferreira
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
- Graduate Program in Basic and Applied Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. Dr. de Lima is now with the Department of Neuroscience, Center for Brain Immunology and Glia (BIG), University of Virginia, Charlottesville, VA, United States. Dr. Fonseca is now with the Department of Anesthesiology, Pain Mechanisms Laboratory, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Kalil A de Lima
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
- Graduate Program in Basic and Applied Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. Dr. de Lima is now with the Department of Neuroscience, Center for Brain Immunology and Glia (BIG), University of Virginia, Charlottesville, VA, United States. Dr. Fonseca is now with the Department of Anesthesiology, Pain Mechanisms Laboratory, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Miriam M Fonseca
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rafaela M Guimarães
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Francisco I Gomes
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Maria C Cavallini
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
- Graduate Program in Basic and Applied Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. Dr. de Lima is now with the Department of Neuroscience, Center for Brain Immunology and Glia (BIG), University of Virginia, Charlottesville, VA, United States. Dr. Fonseca is now with the Department of Anesthesiology, Pain Mechanisms Laboratory, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Andreza U Quadros
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ricardo Kusuda
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Center for Research on Inflammatory Diseases (CRID), Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
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Cheong Y, Kim M, Kim N, Hwang B. Effect of two-week continuous epidural administration of 2% lidocaine on mechanical allodynia induced by spinal nerve ligation in rats. Anesth Pain Med (Seoul) 2020; 15:334-343. [PMID: 33329833 PMCID: PMC7713833 DOI: 10.17085/apm.20033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 11/17/2022] Open
Abstract
Background Lidocaine is an effective against certain types of neuropathic pain. This study aimed to investigate whether timing of initiating continuous epidural infusion of lidocaine affected the glial activation and development of neuropathic pain induced by L5/6 spinal nerve ligation (SNL) in rats. Methods Following L5/6 SNL, rats were epidurally infused 2% lidocaine (drug infusion initiated on days 1, and 7 post SNL model establishment) or saline (saline infusion initiated on day 1 post SNL model establishment) continuously for 14 days. Mechanical allodynia of the hind paw to von Frey filament stimuli was determined prior to surgery, postoperative day 3, and once weekly after SNL model establishment. At 7 days after the infusion of saline or lidocaine ended, spinal activation of proinflammatory cytokines and astrocytes was evaluated immunohistochemically, using antibodies to interleukin-6 (IL-6) and glial fibrillary acidic protein (GFAP). Results Continuous epidural administration of 2% lidocaine for 14 days increased the mechanical withdrawal threshold regardless of the difference in timing of initiating lidocaine administration. Epidurally infusing 2% lidocaine inhibited nerve ligation-induced IL-6 and GFAP activation. In the 2% lidocaine infusion group, rats maintained the increased mechanical withdrawal threshold even at 7 days after the discontinuation of 2% lidocaine infusion. Conclusions Continuous epidural administration of 2% lidocaine inhibited the development of SNL-induced mechanical allodynia and suppressed IL-6 and GFAP activation regardless of the difference in timing of initiating lidocaine administration.
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Affiliation(s)
- Yuseon Cheong
- Department of Anesthesiology and Pain Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Minsoo Kim
- Department of Anesthesiology and Pain Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Namyoong Kim
- Department of Anesthesiology and Pain Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Byeongmun Hwang
- Department of Anesthesiology and Pain Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
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Kartha S, Yan L, Ita ME, Amirshaghaghi A, Luo L, Wei Y, Tsourkas A, Winkelstein BA, Cheng Z. Phospholipase A 2 Inhibitor-Loaded Phospholipid Micelles Abolish Neuropathic Pain. ACS NANO 2020; 14:8103-8115. [PMID: 32484651 PMCID: PMC7438274 DOI: 10.1021/acsnano.0c00999] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Treating persistent neuropathic pain remains a major clinical challenge. Current conventional treatment approaches carry a substantial risk of toxicity and provide only transient pain relief. In this work, we show that the activity and expression of the inflammatory mediator secretory phospholipase-A2 (sPLA2) enzyme increases in the spinal cord after painful nerve root compression. We then develop phospholipid micelle-based nanoparticles that release their payload in response to sPLA2 activity. Using a rodent model of neuropathic pain, phospholipid micelles loaded with the sPLA2 inhibitor, thioetheramide-PC (TEA-PC), are administered either locally or intravenously at the time of painful injury or 1-2 days afterward. Local micelle administration immediately after compression prevents pain for up to 7 days. Delayed intravenous administration of the micelles attenuates existing pain. These findings suggest that sPLA2 inhibitor-loaded micelles can be a promising anti-inflammatory nanotherapeutic for neuropathic pain treatment.
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Affiliation(s)
- Sonia Kartha
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Lesan Yan
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Meagan E Ita
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Ahmad Amirshaghaghi
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Lijun Luo
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Yulong Wei
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Andrew Tsourkas
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
| | - Beth A Winkelstein
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
- Department of Neurosurgery, University of Pennsylvania, Hospital of the University of Pennsylvania, 3400 Spruce Street, 3 Silverstein, Philadelphia, Pennsylvania 19104, United States
| | - Zhiliang Cheng
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
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Schmid AB, Fundaun J, Tampin B. Entrapment neuropathies: a contemporary approach to pathophysiology, clinical assessment, and management. Pain Rep 2020; 5:e829. [PMID: 32766466 PMCID: PMC7382548 DOI: 10.1097/pr9.0000000000000829] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 05/04/2020] [Accepted: 05/30/2020] [Indexed: 12/18/2022] Open
Abstract
Entrapment neuropathies such as carpal tunnel syndrome, radiculopathies, or radicular pain are the most common peripheral neuropathies and also the most common cause for neuropathic pain. Despite their high prevalence, they often remain challenging to diagnose and manage in a clinical setting. Summarising the evidence from both preclinical and clinical studies, this review provides an update on the aetiology and pathophysiology of entrapment neuropathies. Potential mechanisms are put in perspective with clinical findings. The contemporary assessment is discussed and diagnostic pitfalls highlighted. The evidence for the noninvasive and surgical management of common entrapment neuropathies is summarised and future areas of research are identified.
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Affiliation(s)
- Annina B. Schmid
- Nuffield Department of Clinical Neurosciences, Oxford University, Oxford, United Kingdom
| | - Joel Fundaun
- Nuffield Department of Clinical Neurosciences, Oxford University, Oxford, United Kingdom
- High Country Physical Therapy, Laramie, WY, USA
| | - Brigitte Tampin
- Department of Physiotherapy, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
- School of Physiotherapy and Exercise Science, Curtin University, Western Australia, Australia
- Faculty of Business Management and Social Sciences, Hochschule Osnabrück, University of Applied Sciences, Osnabrück, Germany
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118
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A transcriptional toolbox for exploring peripheral neuroimmune interactions. Pain 2020; 161:2089-2106. [DOI: 10.1097/j.pain.0000000000001914] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/16/2020] [Indexed: 12/28/2022]
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119
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Hill CJ, Fakhreldin M, Maclean A, Dobson L, Nancarrow L, Bradfield A, Choi F, Daley D, Tempest N, Hapangama DK. Endometriosis and the Fallopian Tubes: Theories of Origin and Clinical Implications. J Clin Med 2020; 9:E1905. [PMID: 32570847 PMCID: PMC7355596 DOI: 10.3390/jcm9061905] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/10/2020] [Accepted: 06/15/2020] [Indexed: 02/06/2023] Open
Abstract
Endometriosis is a common, oestrogen driven chronic condition, where endometrium-like epithelial and stromal cells exist in ectopic sites. At present, no curative treatments are available and the existing evidence for disease progression is conflicting. The pathogenesis is still unknown and evidently complex, as mechanisms of initiation may depend on the anatomical distribution of endometriotic lesions. However, amongst the numerous theories and plethora of mechanisms, contributions of the fallopian tubes (FT) to endometriosis are rarely discussed. The FT are implicated in all endometriosis associated symptomatology and clinical consequences; they may contribute to the origin of endometriotic tissue, determine the sites for ectopic lesion establishment and act as conduits for the spread of proinflammatory media. Here, we examine the available evidence for the contribution of the human FT to the origin, pathogenesis and symptoms/clinical consequences of endometriosis. We also examine the broader topic linking endometriosis and the FT epithelium to the genesis of ovarian epithelial cancers. Further studies elucidating the distinct functional and phenotypical characteristics of FT mucosa may allow the development of novel treatment strategies for endometriosis that are potentially curative.
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Affiliation(s)
- Christopher J. Hill
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
| | - Marwa Fakhreldin
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
| | - Alison Maclean
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
| | - Lucy Dobson
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
| | - Lewis Nancarrow
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
| | - Alice Bradfield
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
| | - Fiona Choi
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
| | - Diandra Daley
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
| | - Nicola Tempest
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
| | - Dharani K. Hapangama
- Centre for Women’s Health Research, Department of Women’s and Children’s Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool L8 7SS, UK; (C.J.H.); (A.M.); (L.D.); (L.N.); (A.B.); (F.C.); (D.D.); (N.T.)
- Liverpool Women’s NHS Foundation Trust, Member of Liverpool Health Partners, Liverpool L8 7SS, UK;
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Huang RY, Poree L, Ho KY, Tsai SY, Liu YC, Tan PH, Wen YR. Behavioral Survey of Effects of Pulsed Radiofrequency on Neuropathic and Nociceptive Pain in Rats: Treatment Profile and Device Implantation. Neuromodulation 2020; 24:1458-1466. [PMID: 32558126 DOI: 10.1111/ner.13169] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Pulsed radiofrequency (PRF) stimulation is widely used for intractable pain; however, there is no consensus on treatment protocols and appropriate types of pain. We compared effectiveness of bipolar and unipolar PRF on neuropathic or inflammatory pains, and of targets at the dorsal root ganglion (DRG) and sciatic nerve (SN). We also examined efficacy of repetitive PRF stimulations. This preclinical study could serve as an extensive survey before human trials. MATERIALS Spare nerve injury (SNI)-induced neuropathic pain and complete Freund's adjuvant (CFA) injection-induced inflammatory pain were used. Behavioral responses were measured using von Frey test, acetone test, and Hargreave's test at preinjury and postinjury time points. In both models, we evaluated results of DRG stimulation with unipolar PRF (45 V) versus bipolar PRF (5 V), stimulation at DRG vs. SN, and repetitive stimulations. RESULTS Both unipolar and bipolar PRFs reduced SNI- or CFA-induced pain for a similar duration. In the SNI model, PRF-DRG had a stronger effect on tactile pain than PRF-SN but lower effect on cold allodynia, whereas in the CFA model PRF-DRG and PRF-SN showed similar effects. Repetitive PRF stimulation, by open technique or implantation method, produced analogous effect by each stimulus, and no evident analgesic tolerance or neurological deficit was shown. CONCLUSIONS PRF temporarily attenuates neuropathic and inflammatory pain. Bipolar PRF generates significant analgesia with a much lower electrical power than unipolar PRF. Meanwhile, the minor variant effects between PRF-DRG and PRF-SN may indicate distinct mechanisms. The sustained-analgesia by repetitive treatments suggests implantation technique could be a promising choice.
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Affiliation(s)
- Ren-Yu Huang
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Lawrence Poree
- Department of Anesthesia, University of California at San Francisco, San Francisco, CA, USA
| | - Kok-Yuen Ho
- Raffles Pain Management Centre, Raffles Hospital, Singapore, Singapore
| | - Shih-Ying Tsai
- Department of Anesthesiology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Yu-Chen Liu
- Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
| | - Ping-Heng Tan
- Department of Biomedical Engineering, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan.,Department of Anesthesiology, Chi Mei Medical Center, Tainan City, Taiwan
| | - Yeong-Ray Wen
- Department of Anesthesiology, School of Medicine, China Medical University, Taichung, Taiwan.,Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan.,Department of Anesthesiology, Pain Management and Research Center, China Medical University Hospital, Taichung, Taiwan.,Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
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121
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Wan L, Li Z, Liu T, Chen X, Xu Q, Yao W, Zhang C, Zhang Y. Epoxyeicosatrienoic acids: Emerging therapeutic agents for central post-stroke pain. Pharmacol Res 2020; 159:104923. [PMID: 32461186 DOI: 10.1016/j.phrs.2020.104923] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/05/2020] [Accepted: 05/08/2020] [Indexed: 01/23/2023]
Abstract
Central post-stroke pain (CPSP) is chronic neuropathic pain due to a lesion or dysfunction of the central nervous system following cerebrovascular insult. This syndrome is characterized by chronic somatosensory abnormalities including spontaneous pain, hyperalgesia and allodynia, which localize to body areas corresponding to the injured brain region. However, despite its potential to impair activities of daily life and cause mood disorders after stroke, it is probably the least recognized complication of stroke. All currently approved treatments for CPSP have limited efficacy but troublesome side effects. The detailed mechanism underlying CPSP is still under investigation; however, its diverse clinical features indicate excessive central neuronal excitability, which is attributed to loss of inhibition and excessive neuroinflammation. Recently, exogenous epoxyeicosatrienoic acids (EETs) have been used to attenuate the mechanical allodynia in CPSP rats and proven to provide a quicker onset and superior pain relief compared to the current first line drug gabapentin. This anti-nociceptive effect is mediated by reserving the normal thalamic inhibition state through neurosteroid-GABA signaling. Moreover, mounting evidence has revealed that EETs exert anti-inflammatory effects by inhibiting the expression of vascular adhesion molecules, activating NFκB, inflammatory cytokines secretion and COX-2 gene induction. The present review focuses on the extensive evidence supporting the potential of EETs to be a multi-functional therapeutic approach for CPSP. Additionally, the role of EETs in the crosstalk between anti-CPSP and the comorbid mood disorder is reviewed herein.
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Affiliation(s)
- Li Wan
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zuofan Li
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Tongtong Liu
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xuhui Chen
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qiaoqiao Xu
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Wenlong Yao
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chuanhan Zhang
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yue Zhang
- Department of Anaesthesiology and Pain Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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Liu M, Li W, Chen Y, Wan X, Wang J. Fucoxanthin: A promising compound for human inflammation-related diseases. Life Sci 2020; 255:117850. [PMID: 32470447 DOI: 10.1016/j.lfs.2020.117850] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/18/2020] [Accepted: 05/23/2020] [Indexed: 02/06/2023]
Abstract
Fucoxanthin, a natural product of carotenoids, is a potential drug source obtained from marine algae. The special chemical structure of fucoxanthin has equipped it with a variety of biological activities. Several studies have indicated that fucoxanthin has a potential protective effect on a variety of inflammation-related diseases. This mechanism may be related to fucoxanthin's strong antioxidant capacity and gut microbiota regulation. The key molecules that require consideration include nuclear factor erythroid 2-related factor 2, Akt serine/threonine kinase/phosphatidylinositol-3-kinase, extracellular signal-regulated kinase, adenosine monophosphate (AMP)-dependent protein kinase, cAMP response element binding protein, and peroxisome proliferator-activated receptorγcoactivator-1α. The study summarizes the recent progress in the research based on the protective effect of fucoxanthin and its related molecular mechanism, in addition to the potential use of fucoxanthin as a promising compound for human inflammation-related diseases.
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Affiliation(s)
- Mingjun Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - Wenwen Li
- Department of Critical Care Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - Ying Chen
- Department of Respiratory Medicine, The Second Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - Xianyao Wan
- Department of Critical Care Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian 116021, China.
| | - Jia Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian 116021, China.
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Kaswan NK, Mohd Suhaimi NS, Mohammed Izham NA, Tengku Mohamad TAS, Sulaiman MR, Perimal EK. Cardamonin inhibits nitric oxide production modulated through NMDA receptor in LPS-Induced SH-SY5Y cell in vitro model. LIFE SCIENCES, MEDICINE AND BIOMEDICINE 2020. [DOI: 10.28916/lsmb.4.9.2020.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Electroacupuncture Treatment Suppresses Transcription Factor IRF8 in Spinal Cord of Rats with Spared Nerve Injury. Pain Res Manag 2020; 2020:1854363. [PMID: 32351637 PMCID: PMC7171679 DOI: 10.1155/2020/1854363] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 02/04/2020] [Accepted: 03/09/2020] [Indexed: 11/25/2022]
Abstract
Objective Neuropathic pain with complex mechanisms has become a major public health problem that greatly impacts patients' quality of life. Therefore, novel and more effective strategies against neuropathic pain need further investigation. Electroacupuncture (EA) has an ameliorating effect on neuropathic pain following spared nerve injury (SNI), but the underlying mechanism remains to be fully clarified. Interferon regulatory factor 8 (IRF8), a critical transcription factor, was reported to be involved in the modulation of neuropathic pain. Here, we focused on exploring whether 2 Hz EA stimulation exerts an inhibitory action on spinal IRF8 in SNI rats. Methods In this study, SNI rats were treated with 2 Hz EA once every other day for 21 days. Paw withdrawal threshold (PWT) was applied to determine the analgesic effect of 2 Hz EA on SNI rats. The spinal IRF8 and CX3CRl expressions were detected with qRT-PCR and western blot, and immunofluorescence staining was used to evaluate colocation of IRF8 or CX3CRl with microglial activation marker CD11b in the spinal cord. Results It was found that SNI induced significant elevation of spinal IRF8 and CX3CRl mRNA and protein expression. Additionally, immunofluorescence results showed that SNI elicited the coexpression of IRF8 with CD11b, as well as CX3CRl with CD11b in the spinal cord. Meanwhile, 2 Hz EA treatment of SNI rats not only reduced IRF8 and CX3CRl mRNA and protein expression, but also reversed the coexpression of IRF8 or CX3CRl with CD11b in the spinal cord, along with an attenuation of SNI-evoked mechanical hypersensitivity. Conclusion This experiment highlighted that 2 Hz EA can inhibit IRF8 expression and microglial activation in the spinal cord of SNI rats. Hence, targeting IRF8 may be a promising therapeutic strategy for 2 Hz EA treatment of neuropathic pain.
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EGFR Signaling Causes Morphine Tolerance and Mechanical Sensitization in Rats. eNeuro 2020; 7:ENEURO.0460-18.2020. [PMID: 32111605 PMCID: PMC7218007 DOI: 10.1523/eneuro.0460-18.2020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/29/2018] [Accepted: 02/17/2020] [Indexed: 01/18/2023] Open
Abstract
The safety and efficacy of opioids are compromised as analgesic tolerance develops. Opioids are also ineffective against neuropathic pain. Recent reports have suggested that inhibitors of the epidermal growth factor receptor (EGFR), a receptor tyrosine kinase (RTK), may have analgesic effects in cancer patients suffering from neuropathic pain. It has been shown that the platelet-derived growth factor receptor-β (PDGFR-β), an RTK that has been shown to interact with the EGFR, mediates opioid tolerance but does not induce analgesia. Therefore, we sought to determine whether EGFR signaling was involved in opioid tolerance and whether EGFR and PDGFR signaling could induce pain in rats. We found that gefitinib, an EGFR antagonist, eliminated morphine tolerance. In addition, repeated EGF administration rendered animals unresponsive to subsequent analgesic doses of morphine, a phenomenon we call "pre-tolerance." Using a nerve injury model, we found that gefitinib alone was not analgesic. Rather, it reversed insensitivity to morphine analgesia (pre-tolerance) caused by the release of EGF by injured nerves. We also showed that repeated, but not acute EGF or PDGF-BB administration induced mechanical hypersensitivity in rats. EGFR and PDGFR-β signaling interacted to produce this sensitization. EGFR was widely expressed in primary sensory afferent cell bodies, demonstrating a neuroanatomical substrate for our findings. Taken together, our results suggest a direct mechanistic link between opioid tolerance and mechanical sensitization. EGFR antagonism could eventually play an important clinical role in the treatment of opioid tolerance and neuropathic pain that is refractory to opioid treatment.
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Duan Z, Zhang J, Li J, Pang X, Wang H. Inhibition of microRNA-155 Reduces Neuropathic Pain During Chemotherapeutic Bortezomib via Engagement of Neuroinflammation. Front Oncol 2020; 10:416. [PMID: 32296644 PMCID: PMC7141419 DOI: 10.3389/fonc.2020.00416] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/10/2020] [Indexed: 02/01/2023] Open
Abstract
As a chemotherapeutic agent, bortezomib (BTZ) is used for the treatment of multiple myeloma with adverse effect of painful peripheral neuropathy. Our current study was to determine the inhibitory effects of blocking microRNA-155 (miR-155) signal on BTZ-induced neuropathic pain and the underlying mechanisms. We employed real time RT-PCR and western blot analysis to examine the miR-155 and expression of pro−inflammatory tumor necrosis factor-α receptor (TNFR1) in the dorsal horn of the spinal cord. Its downstream signals p38-MAPK and JNK and transient receptor potential ankyrin 1 (TRPA1) were also determined. Mechanical pain and cold sensitivity were assessed by behavioral test. In result, inhibition of miR-155 significantly attenuated mechanical allodynia and thermal hyperalgesia in BTZ rats, which was accompanied with decreasing expression of TNFR1, p38-MAPK, JNK, and TRPA1. In contrast, miRNA-155 mimics amplified TNFR1-TRPA1 pathway and augmented mechanical pain and cold sensitivity. In addition, mechanical and thermal hypersensitivity induced by miRNA-155 mimics were attenuated after blocking TNFR1, p38-MAPK, JNK, and TRPA1. Overall, we show the key role of miR-155 in modifying BTZ-induced neuropathic pain through TNFR1-TRPA1 pathway, suggesting that miR-155 is a potential target in preventing neuropathic pain development during intervention of BTZ.
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Affiliation(s)
- Zongsheng Duan
- Department of Anesthesiology, The First Hospital of Jilin University, Changchun, China
| | - Jian Zhang
- Department of Anesthesiology, The First Hospital of Jilin University, Changchun, China
| | - Jing Li
- Department of Radiology, The Second Part of The First Hospital of Jilin University, Changchun, China
| | - Xiaochuan Pang
- Clinical Laboratory, The First Hospital of Jilin University, Changchun, China
| | - Hushan Wang
- Department of Anesthesiology, The First Hospital of Jilin University, Changchun, China
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β-Glucan augments IL-1β production by activating the JAK2/STAT3 pathway in cultured rabbit keratinocytes. Microb Pathog 2020; 144:104175. [PMID: 32224209 DOI: 10.1016/j.micpath.2020.104175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/23/2020] [Accepted: 03/23/2020] [Indexed: 11/23/2022]
Abstract
Trichophyton mentagrophytes (T. mentagrophytes) is the main cause of rabbit dermatophytosis. As the main pathogen-associated molecular pattern of T. mentagrophytes, the role of β-glucan in the pathogenesis of rabbit dermatophytosis remains elusive. Keratinocytes (KC) are the main cellular component and the first defensive line against fungal pathogens in the skin. Therefore, the present study investigated the effects of β-glucan on rabbit KC from dorsal skin. β-glucan was found to inhibit KC proliferation by 10% at 20 ug/ml and this concentration was thus considered as optimal. Next, 20 ug/ml β-glucan stimulation for 24 h significantly increased CXCL8, CXCL11, and IL-1β secretions in KC. Furthermore, β-glucan exposure induced the expressions of JAK2 mRNA, STAT3 mRNA, and p-STAT3 protein. Silencing JAK2 expression inhibited p-STAT3 protein expression and β-glucan-induced IL-1β secretion. And overexpression of JAK2 further promoted β-glucan-mediated p-STAT3 protein and IL-1β productions. These results suggested that β-glucan-induced CXCL8, CXCL11, and IL-1β secretions in rabbit KC might be involved in the inflammatory response of T. mentagrophytes infected rabbit dorsal skin. However, only IL-1β secretion was promoted by the JAK2/STAT3 signaling pathway. In conclusion, this study is a necessary step toward elucidating the mechanisms that underlie skin immune system injury stimulated by β-glucan.
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Wang L, Yin C, Liu T, Abdul M, Zhou Y, Cao JL, Lu C. Pellino1 regulates neuropathic pain as well as microglial activation through the regulation of MAPK/NF-κB signaling in the spinal cord. J Neuroinflammation 2020; 17:83. [PMID: 32171293 PMCID: PMC7071701 DOI: 10.1186/s12974-020-01754-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 02/21/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Spinal cord microglia plays a crucial role in the pathogenesis of neuropathic pain. However, the mechanisms underlying spinal microglial activation during neuropathic pain remain incompletely determined. Here, we investigated the role of Pellino1 (Peli1) and its interplay with spinal microglial activation in neuropathic pain. METHODS In this study, we examined the effects of Peli1 on pain hypersensitivity and spinal microglial activation after chronic constriction injury (CCI) of the sciatic nerve in mice. The molecular mechanisms involved in Peli1-mediated hyperalgesia were determined by western blot, immunofluorescence, quantitative polymerase chain reaction (qPCR), and enzyme-linked immunosorbent assay (ELISA). We utilized immunoprecipitation to examine the ubiquitination of tumor necrosis factor receptor-associated factor 6 (TRAF6) following CCI. In addition, we explored the effect of Peli1 on BV2 microglial cells in response to lipopolysaccharide (LPS) challenge. RESULTS We found that CCI induced a significant increase in the levels of Peli1, which was present in the great majority of microglia in the spinal dorsal horn. Our results showed that spinal Peli1 contributed to the induction and maintenance of CCI-induced neuropathic pain. The biochemical data revealed that CCI-induced Peli1 in the spinal cord significantly increased mitogen-activated protein kinase (MAPK) phosphorylation, activated nuclear factor kappa B (NF-κB), and enhanced the production of proinflammatory cytokines, accompanied by spinal microglial activation. Peli1 additionally was able to promote K63-linked ubiquitination of TRAF6 in the ipsilateral spinal cord following CCI. Furthermore, we demonstrated that Peli1 in microglial cells significantly enhanced inflammatory reactions after LPS treatment. CONCLUSION These results suggest that the upregulation of spinal Peli1 is essential for the pathogenesis of neuropathic pain via Peli1-dependent mobilization of spinal cord microglia, activation of MAPK/NF-κB signaling, and production of proinflammatory cytokines. Modulation of Peli1 may serve as a potential approach for the treatment of neuropathic pain.
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Affiliation(s)
- Lijuan Wang
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China
| | - Cui Yin
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China
| | - Tianya Liu
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Pharmacy, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, 221002, China
| | - Mannan Abdul
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China
| | - Yan Zhou
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, 221002, China
| | - Jun-Li Cao
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China.
- Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.
| | - Chen Lu
- School of Anesthesiology, Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, 221002, China.
- Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, Jiangsu, China.
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Fujino K, Yokota A, Ohno K, Hirofuji S, Neo M. Impairment and restoration of the blood-nerve barrier and its correlation with pain following gradual nerve elongation of the rat sciatic nerve. Int J Neurosci 2020; 131:254-263. [PMID: 32167000 DOI: 10.1080/00207454.2020.1738430] [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: 10/24/2022]
Abstract
Purpose: This study aimed to evaluate the time course of impairment and restoration of the blood-nerve barrier (BNB) following gradual elongation of the sciatic nerve and to clarify its association with nociception.Materials and Methods: The right femur was lengthened at a rate of 1.5 mm/day for 10 days. Von Frey tests were performed until 50 days after lengthening. Compound muscle action potentials (CMAPs) were measured to assess gross dysfunction of the elongated nerve. Evans blue-albumin tracing and immunohistochemistry for endothelial barrier antigen (EBA), rat endothelial cell antigen-1 (RECA-1), and CD68 for qualitative and quantitative analysis of the BNB and macrophage infiltration were performed for up to 50 days after cessation of lengthening in three segments of the sciatic nerves.Results: Paw-withdrawal threshold was significantly decreased at 7 days from initiation and began to recover from day 25 after lengthening. CMAPs showed delayed latency and attenuated amplitude but recovered at day 30 after cessation. On days 10 and 30 after cessation, spotted leakage of Evans blue-albumin in the endoneurium was observed, and the ratio of EBA/RECA-1-positive microvessels was significantly decreased, which subsequently recovered simultaneously in all segments on day 50 after cessation. Macrophages did not infiltrate the BNB at any time point.Conclusion: The restoration of BNB function following gradual nerve elongation was associated with the resolution of mechanical allodynia. Our findings provide insight into the association between nerve stretch injury and chronic nociception in adult male rats, which are potentially relevant to human orthopedic procedures and chronic neuropathic pain.
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Affiliation(s)
- Keitaro Fujino
- Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
| | - Atsushi Yokota
- Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
| | - Katsunori Ohno
- Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
| | - Shinji Hirofuji
- Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
| | - Masashi Neo
- Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
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Elkholy SE, Elaidy SM, El-Sherbeeny NA, Toraih EA, El-Gawly HW. Neuroprotective effects of ranolazine versus pioglitazone in experimental diabetic neuropathy: Targeting Nav1.7 channels and PPAR-γ. Life Sci 2020; 250:117557. [PMID: 32184124 DOI: 10.1016/j.lfs.2020.117557] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/22/2020] [Accepted: 03/13/2020] [Indexed: 12/11/2022]
Abstract
Diabetic neuropathy (DN) is a common complication of diabetes mellitus (DM). Pathophysiology of DN includes inflammation and changes in expression and function of voltage-gated sodium channels (Nav) in peripheral nerves; and central reduction of Peroxisome Proliferator Activated Receptor-Gamma (PPAR-γ) expression. AIM This study explored the effect of ranolazine (RN) versus pioglitazone (PIO) in DN induced in rats. The role of sciatic interleukin (IL)-1β, tumor necrosis factor-alpha (TNF)-α, Nav1.7, and spinal PPAR-γ expressions were determined. MATERIALS AND METHODS For induction of Type-2 DM, 40 high fat diet-fed rats were challenged by a single dose of intraperitoneal streptozotocin (30 mg/kg). One week later, oral PIO (10 mg/kg; once daily) or RN (20, 50 and 100 mg/kg; twice daily) were administered for six weeks. Weekly body weight and fasting blood sugar (FBS) were measured. Rats were tested for thermal hyperalgesia and mechanical allodynia. At the end of the experiment, sciatic nerves homogenates were examined for TNF-α and IL-1B levels, and Nav1.7 channel expression. Segments of spinal cords were investigated for the PPAR-γ gene expression. Evaluation of histopathology of sciatic nerves and spinal cords were done. KEY FINDINGS In diabetic rats, PIO and RN individually improved evoked-pain behaviors, reduced sciatic TNF-α and 1L-1B levels; downregulated expressional levels of Nav1.7 channels; and increased the spinal PPAR-γ gene expression. RN in the dose of 100 mg/kg/day showed the most advantageous effects. SIGNIFICANCE RN has neuroprotective effects in Type-2 diabetes-induced DN. Further studies of combined RN-PIO treatment are recommended, especially in diabetic patients with cardiovascular co-morbidity.
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Affiliation(s)
- Shereen E Elkholy
- Department of Clinical Pharmacology, Faculty of Medicine, Port-Said University, Port-Said, Egypt
| | - Samah M Elaidy
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nagla A El-Sherbeeny
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
| | - Eman A Toraih
- Department of Surgery, Tulane University, School of Medicine, New Orleans, LA, USA; Genetics Unit, Department of Histology and Cell Biology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt; Center of Excellence of Molecular and Cellular Medicine, Suez Canal University, Ismailia, Egypt
| | - Hoda W El-Gawly
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
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Safakhah HA, Damghanian F, Bandegi AR, Miladi-Gorji H. Effect of crocin on morphine tolerance and serum BDNF levels in a rat model of neuropathic pain. Pharmacol Rep 2020; 72:305-313. [PMID: 32112363 DOI: 10.1007/s43440-020-00071-9] [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] [Received: 06/29/2019] [Revised: 12/13/2019] [Accepted: 01/08/2020] [Indexed: 01/27/2023]
Abstract
BACKGROUND Chronic use of morphine treatment for neuropathic pain leads to morphine-induced analgesic tolerance. Crocin contained in Crocus sativus L., exerts anti-inflammatory and analgesic effects. This study examined the effects of crocin on morphine tolerance and serum BDNF levels on neuropathic pain induced by chronic constriction injury (CCI) in rats. METHODS CCI model of neuropathic pain was done in male Wistar rats (200-250 g). Rats were treated with crocin (15 or 30 mg/kg, intraperitoneally) alone or simultaneously with morphine (10 mg/kg, subcutaneously) during or after induction of CCI. Pain behavioral responses including mechanical allodynia and thermal hyperalgesia were measured from days of 15-27 after CCI. Then, rats were evaluated for serum BDNF levels on days 14 and/or 27. RESULTS We found that morphine tolerance developed after the induction of neuropathic pain. The injection of crocin (15 and 30 mg/kg) was able to enhance analgesic effect of morphine by reduction of mechanical allodynia on days 15-27 post-surgery in CCI rats. While preemptive administration of crocin at a lower dose (15 mg/kg) maintained the analgesic effect of morphine. Morphine injection and/or co-administration with crocin (15, 30 mg/kg) decreased serum BDNF levels in CCI rats. CONCLUSION These findings indicate that crocin may have a therapeutic effect to maintain morphine analgesic efficacy and also to prevent the development of morphine tolerance in neuropathic pain, but probably not through BDNF.
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Affiliation(s)
- Hossein Ali Safakhah
- Laboratory of Animal Addiction Models, Research Center of Physiology, School of Medicine, Semnan University of Medical Sciences, P.O. Box 35131-38111, Semnan, Iran.,Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Farkhondeh Damghanian
- Laboratory of Animal Addiction Models, Research Center of Physiology, School of Medicine, Semnan University of Medical Sciences, P.O. Box 35131-38111, Semnan, Iran.,Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Ahmad-Reza Bandegi
- Department of Biochemistry, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Hossein Miladi-Gorji
- Laboratory of Animal Addiction Models, Research Center of Physiology, School of Medicine, Semnan University of Medical Sciences, P.O. Box 35131-38111, Semnan, Iran. .,Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
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Celik MÖ, Labuz D, Keye J, Glauben R, Machelska H. IL-4 induces M2 macrophages to produce sustained analgesia via opioids. JCI Insight 2020; 5:133093. [PMID: 32102987 DOI: 10.1172/jci.insight.133093] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/22/2020] [Indexed: 12/13/2022] Open
Abstract
IL-4 is a pleiotropic antiinflammatory cytokine, which can be neuroprotective after nervous system injury. The beneficial actions of IL-4 are thought to result from the blunting of action of inflammatory mediators, such as proinflammatory cytokines. Here, we demonstrate that IL-4 induces M2 macrophages to continuously produce opioid peptides and ameliorate pain. IL-4 application at injured nerves in mice shifted F4/80+ macrophages from the proinflammatory M1 to the antiinflammatory M2 phenotype, which synthesized opioid peptides (Met-enkephalin, β-endorphin, and dynorphin A 1-17). These effects were accompanied by a long-lasting attenuation of neuropathy-induced mechanical hypersensitivity, beyond the IL-4 treatment. This IL-4-induced analgesia was decreased by opioid peptide antibodies and opioid receptor (δ, μ, κ) antagonists applied at injured nerves, which confirms the involvement of the local opioid system. The participation of M2 macrophages was supported by analgesia in recipient mice injected at injured nerves with F4/80+ macrophages from IL-4-treated donors. Together, IL-4-induced M2 macrophages at injured nerves produced opioid peptides, which activated peripheral opioid receptors to diminish pain. Fostering the opioid-mediated actions of intrinsic M2 macrophages may be a strategy to tackle pathological pain.
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Affiliation(s)
| | | | - Jacqueline Keye
- Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Campus Benjamin Franklin, Berlin, Germany
| | - Rainer Glauben
- Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Campus Benjamin Franklin, Berlin, Germany
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Behavioral, Electrophysiological, and Histological Characterization of a New Rat Model for Neoadjuvant Chemotherapy–Induced Neuropathic Pain: Therapeutic Potential of Duloxetine and Allopregnanolone Concomitant Treatment. Neurotox Res 2020; 38:145-162. [DOI: 10.1007/s12640-020-00176-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 01/12/2020] [Accepted: 02/06/2020] [Indexed: 12/13/2022]
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Jager SE, Pallesen LT, Richner M, Harley P, Hore Z, McMahon S, Denk F, Vaegter CB. Changes in the transcriptional fingerprint of satellite glial cells following peripheral nerve injury. Glia 2020; 68:1375-1395. [PMID: 32045043 DOI: 10.1002/glia.23785] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/09/2020] [Accepted: 01/10/2020] [Indexed: 01/13/2023]
Abstract
Satellite glial cells (SGCs) are homeostatic cells enveloping the somata of peripheral sensory and autonomic neurons. A wide variety of neuronal stressors trigger activation of SGCs, contributing to, for example, neuropathic pain through modulation of neuronal activity. However, compared to neurons and other glial cells of the nervous system, SGCs have received modest scientific attention and very little is known about SGC biology, possibly due to the experimental challenges associated with studying them in vivo and in vitro. Utilizing a recently developed method to obtain SGC RNA from dorsal root ganglia (DRG), we took a systematic approach to characterize the SGC transcriptional fingerprint by using next-generation sequencing and, for the first time, obtain an overview of the SGC injury response. Our RNA sequencing data are easily accessible in supporting information in Excel format. They reveal that SGCs are enriched in genes related to the immune system and cell-to-cell communication. Analysis of SGC transcriptional changes in a nerve injury-paradigm reveal a differential response at 3 days versus 14 days postinjury, suggesting dynamic modulation of SGC function over time. Significant downregulation of several genes linked to cholesterol synthesis was observed at both time points. In contrast, regulation of gene clusters linked to the immune system (MHC protein complex and leukocyte migration) was mainly observed after 14 days. Finally, we demonstrate that, after nerve injury, macrophages are in closer physical proximity to both small and large DRG neurons, and that previously reported injury-induced proliferation of SGCs may, in fact, be proliferating macrophages.
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Affiliation(s)
- Sara E Jager
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, Aarhus C, Denmark.,Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
| | - Lone T Pallesen
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Mette Richner
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Peter Harley
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
| | - Zoe Hore
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
| | - Stephen McMahon
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
| | - Franziska Denk
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
| | - Christian B Vaegter
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, Aarhus C, Denmark
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135
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Buksh AB. Ultrasound-guided injections of amniotic membrane/umbilical cord particulate for painful neuropathy of the lower extremity. COGENT MEDICINE 2020. [DOI: 10.1080/2331205x.2020.1724067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Ahmed Bilal Buksh
- Edmond Foot and Ankle Clinic Edmond OK USA
- Norman Foot and Ankle Clinic Norman OK USA
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136
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Granulocyte-Macrophage Colony Stimulating Factor As an Indirect Mediator of Nociceptor Activation and Pain. J Neurosci 2020; 40:2189-2199. [PMID: 32019828 DOI: 10.1523/jneurosci.2268-19.2020] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 01/07/2020] [Accepted: 01/14/2020] [Indexed: 12/11/2022] Open
Abstract
The interaction between the immune system and the nervous system has been at the center of multiple research studies in recent years. Whereas the role played by cytokines as neuronal mediators is no longer contested, the mechanisms by which cytokines modulate pain processing remain to be elucidated. In this study, we have analyzed the involvement of granulocyte-macrophage colony stimulating factor (GM-CSF) in nociceptor activation in male and female mice. Previous studies have suggested GM-CSF might directly activate neurons. However, here we established the absence of a functional GM-CSF receptor in murine nociceptors, and suggest an indirect mechanism of action, via immune cells. We report that GM-CSF applied directly to magnetically purified nociceptors does not induce any transcriptional changes in nociceptive genes. In contrast, conditioned medium from GM-CSF-treated murine macrophages was able to drive nociceptor transcription. We also found that conditioned medium from nociceptors treated with the well established pain mediator, nerve growth factor, could also modify macrophage gene transcription, providing further evidence for a bidirectional crosstalk.SIGNIFICANCE STATEMENT The interaction of the immune system and the nervous system is known to play an important role in the development and maintenance of chronic pain disorders. Elucidating the mechanisms of these interactions is an important step toward understanding, and therefore treating, chronic pain disorders. This study provides evidence for a two-way crosstalk between macrophages and nociceptors in the peripheral nervous system, which may contribute to the sensitization of nociceptors by cytokines in pain development.
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137
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Kawamoto H, Iwatsuki K, Kurimoto S, Yamamoto M, Tatebe M, Morita A, Kinoshita F, Hirata H. Interleukin‐6 secretion by fibroblasts in carpal tunnel syndrome patients is associated with trigger finger and inhibited by tranilast. Muscle Nerve 2020; 61:408-415. [DOI: 10.1002/mus.26793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Hiroya Kawamoto
- Department of OrthopaedicsYokkaichi Municipal Hospital Mie Japan
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
| | - Katsuyuki Iwatsuki
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
| | - Shigeru Kurimoto
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
| | - Michiro Yamamoto
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
| | - Masahiro Tatebe
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
| | - Akimasa Morita
- Department of OrthopaedicsSuzuka Kaisei Hospital Mie Japan
| | - Fumie Kinoshita
- Data Coordinating Center, Department of Advanced MedicineNagoya University Hospital Nagoya Japan
| | - Hitoshi Hirata
- Department of Hand SurgeryNagoya University Graduate School of Medicine Nagoya Japan
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138
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Kang MS, Hyun KY. Antinociceptive and Anti-Inflammatory Effects of Nypa fruticans Wurmb by Suppressing TRPV1 in the Sciatic Neuropathies. Nutrients 2020; 12:E135. [PMID: 31947713 PMCID: PMC7019541 DOI: 10.3390/nu12010135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/27/2019] [Accepted: 12/27/2019] [Indexed: 11/17/2022] Open
Abstract
Neuropathic pain is generally characterized by sensory abnormalities such as sensory disorders, hyperalgesia, and allodynia. Recent studies have reported that TRPV1 activation is essential for establishing of inflammation in the neuropathy pain models, showing that the expression of this receptor is increased, and contributing to enhanced thermal sensitivity. Nypa fruticans Wurmb (NF), which was used as a folk remedy, is a plant that is gaining attention due to its various effects. In this study, we investigated the antinociceptive and anti-inflammatory effects of NFE (Nypa fruticans Wurmb extracts) by controlling the neurological function of TRPV1. In sciatic crush injury rat models, a significant level of antinociceptive effect was observed in the thermal hyperalgesia test in which NF extracts (NFE 500 mg/kg) were orally administered, daily. Protein quantification of the sciatic nerve and the of the L4-L6 spinal cord showed a decrease of the TRPV1 expression, the inflammatory expression factor, COX2, and proinflammatory factors in the NFE treated groups. Our results indicate that NFE affects antinociceptive and anti-inflammatory by controlling TRPV1 in sciatic neuropathic pain models.
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Affiliation(s)
- Mi-sun Kang
- Department of Rehabilitation medicine, Pusan National University Yangsan Hospital, Yangsan 50612, Korea;
| | - Kyung-Yae Hyun
- Department of Clinical Laboratory Science, Dong-Eui University, Busan 47340, Korea
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139
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Vigneri S, Sindaco G, La Grua M, Zanella M, Lo Bianco G, Paci V, Vinci FM, Sciacca C, Ravaioli L, Pari G. Electrocatheter-mediated High-voltage Pulsed Radiofrequency of the Dorsal Root Ganglion in the Treatment of Chronic Lumbosacral Neuropathic Pain: A Randomized Controlled Study. Clin J Pain 2020; 36:25-33. [PMID: 31577546 PMCID: PMC6903354 DOI: 10.1097/ajp.0000000000000766] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 08/21/2019] [Accepted: 09/08/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Despite the interest in scientific community, there is still poor evidence about pulsed radiofrequency (PRF) efficacy in the treatment of neuropathic pain. In order to determine whether high-voltage PRF and epidural adhesiolysis (PRF-EA) showed better results than epidural adhesiolysis alone (EA), a randomized, double-blind, comparative-effectiveness study was conducted in patients with chronic lumbosacral radiating pain and neuropathic features. MATERIALS AND METHODS A total of 41 patients were randomly allocated to 2 groups. Twenty-one patients were randomized to receive 2 cycles of 240 seconds high-voltage PRF followed by the injection of local anesthetics, hyaluronidase, and betamethasone, whereas 20 patients underwent sham stimulation followed by adhesiolysis. The treatment was delivered at the affected lumbosacral roots and patients, treating physicians and assessors were blinded to intervention. RESULTS A significant reduction of radiating pain was observed in mean Numeric Rating Scale score at follow-up. A change of -3.43 versus -1.75 (P=0.031) after 1 month and -3.34 versus -0.80 (P=0.005) after 6 months was reported in patients undergoing PRF-EA in comparison with EA, respectively. After 1 month, 57% of patients in the PRF-EA group experienced a pain reduction of ≥50% versus only 25% of patients allocated to EA (P=0.037). Improvement decreased to 48% in the PRF-EA group whereas only 10% of EA reported significant pain relief after 6 months (P=0.008). DISCUSSION High-voltage PRF of dorsal root ganglion delivered through multifunctional electrode provided significant pain relief and may be considered a valuable treatment in chronic lumbosacral radicular pain with neuropathic features.
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Affiliation(s)
- Simone Vigneri
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), University of Palermo, Palermo
| | | | - Marco La Grua
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
| | - Matteo Zanella
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
| | - Giuliano Lo Bianco
- I.R.C.C.S. Centro Regionale Oncologico, Pain Medicine Unit, Rionero in Vulture, Italy
| | - Valentina Paci
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
| | | | - Chiara Sciacca
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
| | - Laura Ravaioli
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
| | - Gilberto Pari
- Santa Maria Maddalena Hospital, Pain Medicine Unit, Occhiobello
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140
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Oh SH, Lee HY, Ki YJ, Kim SH, Lim KJ, Jung KT. Gabexate mesilate ameliorates the neuropathic pain in a rat model by inhibition of proinflammatory cytokines and nitric oxide pathway via suppression of nuclear factor-κB. Korean J Pain 2020; 33:30-39. [PMID: 31888315 PMCID: PMC6944363 DOI: 10.3344/kjp.2020.33.1.30] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 11/02/2019] [Accepted: 11/03/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND This study examined the effects of gabexate mesilate on spinal nerve ligation (SNL)-induced neuropathic pain. To confirm the involvement of gabexate mesilate on neuroinflammation, we focused on the activation of nuclear factor-κB (NF-κB) and consequent the expression of proinflammatory cytokines and inducible nitric oxide synthase (iNOS). METHODS Male Sprague-Dawley rats were used for the study. After randomization into three groups: the sham-operation group, vehicle-treated group (administered normal saline as a control), and the gabexate group (administered gabexate mesilate 20 mg/kg), SNL was performed. At the 3rd day, mechanical allodynia was confirmed using von Frey filaments, and drugs were administered intraperitoneally daily according to the group. The paw withdrawal threshold (PWT) was examined on the 3rd, 7th, and 14th day. The expressions of p65 subunit of NF-κB, interleukin (IL)-1, IL-6, tumor necrosis factor-α, and iNOS were evaluated on the 7th and 14th day following SNL. RESULTS The PWT was significantly higher in the gabexate group compared with the vehicle-treated group (P < 0.05). The expressions of p65, proinflammatory cytokines, and iNOS significantly decreased in the gabexate group compared with the vehicle-treated group (P < 0.05) on the 7th day. On the 14th day, the expressions of p65 and iNOS showed lower levels, but those of the proinflammatory cytokines showed no significant differences. CONCLUSIONS Gabexate mesilate increased PWT after SNL and attenuate the progress of mechanical allodynia. These results seem to be involved with the anti-inflammatory effect of gabexate mesilate via inhibition of NF-κB, proinflammatory cytokines, and nitric oxide.
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Affiliation(s)
- Seon Hee Oh
- School of Medicine, Chosun University, Gwangju,
Korea
| | - Hyun Young Lee
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju,
Korea
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju,
Korea
| | - Young Joon Ki
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju,
Korea
| | - Sang Hun Kim
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju,
Korea
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju,
Korea
| | - Kyung Joon Lim
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju,
Korea
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju,
Korea
| | - Ki Tae Jung
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwangju,
Korea
- Department of Anesthesiology and Pain Medicine, School of Medicine, Chosun University, Gwangju,
Korea
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141
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Holmes S, Barakat N, Bhasin M, Lopez N, Lebel A, Zurakowski D, Thomas B, Bhasin S, Silva K, Borra R, Burstein R, Simons L, Borsook D. Biological and behavioral markers of pain following nerve injury in humans. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2020; 7:100038. [PMID: 31890990 PMCID: PMC6926375 DOI: 10.1016/j.ynpai.2019.100038] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/12/2019] [Accepted: 11/19/2019] [Indexed: 12/18/2022]
Abstract
The evolution of peripheral and central changes following a peripheral nerve injury imply the onset of afferent signals that affect the brain. Changes to inflammatory processes may contribute to peripheral and central alterations such as altered psychological state and are not well characterized in humans. We focused on four elements that change peripheral and central nervous systems following ankle injury in 24 adolescent patients and 12 age-sex matched controls. Findings include (a) Changes in tibial, fibular, and sciatic nerve divisions consistent with neurodegeneration; (b) Changes within the primary motor and somatosensory areas as well as higher order brain regions implicated in pain processing; (c) Increased expression of fear of pain and pain reporting; and (d) Significant changes in cytokine profiles relating to neuroinflammatory signaling pathways. Findings address how changes resulting from peripheral nerve injury may develop into chronic neuropathic pain through changes in the peripheral and central nervous system.
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Affiliation(s)
- S.A. Holmes
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
- Department of Anesthesia, Harvard Medical School, Boston, MA 02115, United States
| | - N. Barakat
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
- Department of Anesthesia, Harvard Medical School, Boston, MA 02115, United States
| | - M. Bhasin
- Bioinformatic and Systems Biology Center, Beth Israel Deaconess Medical Center, United States
- Department of Medicine, Harvard Medical School, United States
| | - N.I. Lopez
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
| | - A. Lebel
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
- Department of Anesthesia, Harvard Medical School, Boston, MA 02115, United States
| | - D. Zurakowski
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
| | - B. Thomas
- Bioinformatic and Systems Biology Center, Beth Israel Deaconess Medical Center, United States
- Department of Medicine, Harvard Medical School, United States
| | - S. Bhasin
- Bioinformatic and Systems Biology Center, Beth Israel Deaconess Medical Center, United States
- Department of Medicine, Harvard Medical School, United States
| | - K.E. Silva
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
| | - R. Borra
- Department of Radiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, Netherlands
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, Netherlands
| | - R. Burstein
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, United States
| | - L.E. Simons
- Department of Anesthesiology, Perioperative & Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, United States
| | - D. Borsook
- Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children’s Hospital, Boston, MA 02215, United States
- Department of Anesthesia, Harvard Medical School, Boston, MA 02115, United States
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Antinociceptive, antiedematous, and antiallodynic activity of 1H-pyrrolo[3,4-c]pyridine-1,3(2H)-dione derivatives in experimental models of pain. Naunyn Schmiedebergs Arch Pharmacol 2019; 393:813-827. [PMID: 31858155 DOI: 10.1007/s00210-019-01783-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 11/28/2019] [Indexed: 12/25/2022]
Abstract
The aim of the presented study was to examine the potential antinociceptive, antiedematous (anti-inflammatory), and antiallodynic activities of two 1H-pyrrolo[3,4-c]pyridine-1,3(2H)-dione derivatives (DSZ 1 and DSZ 3) in various experimental models of pain. For this purpose, the hot plate test, the capsaicin test, the formalin test, the carrageenan model, and oxaliplatin-induced allodynia tests were performed. In the hot plate test, only DSZ 1 in the highest dose (20 mg/kg) was active but its effects appear to be due to sedatation rather than antinociceptiveness. In capsaicin-induced neurogenic pain model, both compounds displayed a significant antinociceptive activity. In the formalin test, DSZ 1 and DSZ 3 (5-20 mg/kg) revealed antinociceptive activity in both phases but it was more pronounced in the second phase of the test. In this test, pretreatment with caffeine, DPCPX reversed the antinociceptive effect of DSZ 3. On the other hand, pretreatment with L-NAME diminished the antinociceptive effect of DSZ 1. Pretreatment with naloxone did not affect antinociceptive activity of both compounds. Similar to ketoprofen, DSZ 1 and DSZ 3 showed antiedematous (antiinflammatory) and antihyperalgesic activity, and similar to lidocaine local anesthetic activity. Furthermore, both compounds (5 and 10 mg/kg) reduced tactile allodynia in acute and chronic phases of neuropathic pain. In the in vitro studies, DSZ 1 and DSZ 3 reduced the COX-2 level in LPS-activated RAW 264.7 cells, which suggests their anti-inflammatory activity. In conclusion, both DSZ 1 and DSZ 3 displayed broad spectrum of activity in several pain models, including neurogenic, tonic, inflammatory, and chemotherapy-induced peripheral neuropathic pain.
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143
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Sant’Anna MB, Lopes FSR, Kimura LF, Giardini AC, Sant’Anna OA, Picolo G. Crotoxin Conjugated to SBA-15 Nanostructured Mesoporous Silica Induces Long-Last Analgesic Effect in the Neuropathic Pain Model in Mice. Toxins (Basel) 2019; 11:E679. [PMID: 31757011 PMCID: PMC6949982 DOI: 10.3390/toxins11120679] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/13/2019] [Accepted: 11/18/2019] [Indexed: 12/29/2022] Open
Abstract
Neuropathic pain is a disease caused by structural and functional plasticity in central and peripheral sensory pathways that produce alterations in nociceptive processing. Currently, pharmacological treatment for this condition remains a challenge. Crotoxin (CTX), the main neurotoxin of Crotalus durissus terrificus rattlesnake venom, has well described prolonged anti-inflammatory and antinociceptive activities. In spite of its potential benefits, the toxicity of CTX remains a limiting factor for its use. SBA-15 is an inert nanostructured mesoporous silica that, when used as a vehicle, may reduce toxicity and potentiate the activity of different compounds. Based on this, we propose to conjugate crotoxin with SBA-15 (CTX:SBA-15) in order to investigate if when adsorbed to silica, CTX would have its toxicity reduced and its analgesic effect enhanced in neuropathic pain induced by the partial sciatic nerve ligation (PSNL) model. SBA-15 enabled an increase of 35% of CTX dosage. Treatment with CTX:SBA-15 induced a long-lasting reduction of mechanical hypernociception, without modifying the previously known pathways involved in antinociception. Moreover, CTX:SBA-15 reduced IL-6 and increased IL-10 levels in the spinal cord. Surprisingly, the antinociceptive effect of CTX:SBA-15 was also observed after oral administration. These data indicate the potential use of the CTX:SBA-15 complex for neuropathic pain control and corroborates the protective potential of SBA-15.
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Affiliation(s)
- Morena Brazil Sant’Anna
- Special Laboratory of Pain and Signalling, Butantan Institute, São Paulo 05503-900, Brazil; (M.B.S.); (F.S.R.L.); (L.F.K.); (A.C.G.)
| | - Flavia Souza Ribeiro Lopes
- Special Laboratory of Pain and Signalling, Butantan Institute, São Paulo 05503-900, Brazil; (M.B.S.); (F.S.R.L.); (L.F.K.); (A.C.G.)
| | - Louise Faggionato Kimura
- Special Laboratory of Pain and Signalling, Butantan Institute, São Paulo 05503-900, Brazil; (M.B.S.); (F.S.R.L.); (L.F.K.); (A.C.G.)
| | - Aline Carolina Giardini
- Special Laboratory of Pain and Signalling, Butantan Institute, São Paulo 05503-900, Brazil; (M.B.S.); (F.S.R.L.); (L.F.K.); (A.C.G.)
| | | | - Gisele Picolo
- Special Laboratory of Pain and Signalling, Butantan Institute, São Paulo 05503-900, Brazil; (M.B.S.); (F.S.R.L.); (L.F.K.); (A.C.G.)
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Abduljabbar T, Vohra F, Ullah A, Alhamoudi N, Khan J, Javed F. Relationship between self‐rated pain and peri‐implant clinical, radiographic and whole salivary inflammatory markers among patients with and without peri‐implantitis. Clin Implant Dent Relat Res 2019; 21:1218-1224. [DOI: 10.1111/cid.12866] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/16/2019] [Accepted: 10/21/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Tariq Abduljabbar
- Department of Prosthetic Dental SciencesCollege of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Fahim Vohra
- Department of Prosthetic Dental SciencesCollege of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Anhar Ullah
- Department of Cardiac SciencesKing Fahad Cardiac Center, College of Medicine, King Saud University Riyadh Saudi Arabia
| | - Nawaf Alhamoudi
- Department of Periodontics and Community DentistryKing Saud University Riyadh Saudi Arabia
| | - Junad Khan
- Orofacial Pain and TMJ DisordersEastman Institute for Oral Health, University of Rochester New York New York
| | - Fawad Javed
- Department of OrthodonticsEastman Institute for Oral Health, University of Rochester New York New York
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Xun S, Zheng R. Retracted
: Dexmedetomidine alleviates neuropathic pain by regulating JAK/STAT pathway in rats. J Cell Biochem 2019; 121:2277-2283. [DOI: 10.1002/jcb.29450] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 10/10/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Shining Xun
- First Department of Anesthesiology and Surgery Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine Xianyang Shaanxi China
| | - Rongzhi Zheng
- First Department of Anesthesiology and Surgery Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine Xianyang Shaanxi China
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146
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Xia YY, Xue M, Wang Y, Huang ZH, Huang C. Electroacupuncture Alleviates Spared Nerve Injury-Induced Neuropathic Pain And Modulates HMGB1/NF-κB Signaling Pathway In The Spinal Cord. J Pain Res 2019; 12:2851-2863. [PMID: 31695479 PMCID: PMC6805246 DOI: 10.2147/jpr.s220201] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 09/12/2019] [Indexed: 01/03/2023] Open
Abstract
Background Neuropathic pain with complications greatly affects patients worldwide. High mobility group box 1 (HMGB1) has been shown to contribute to the pathogenesis of neuropathic pain; thus, suppression of HMGB1 may provide a novel therapeutic option for neuropathic pain. Electroacupuncture (EA) has been indicated to be effective in attenuating neuropathic pain, but the underlying mechanism remains to be fully clarified. We aim to explore whether 2Hz EA stimulation regulates the spinal HMGB1/NF-κB signaling in neuropathic pain induced by spared nerve injury (SNI). Materials and methods Paw withdrawal threshold and CatWalk gait analysis were used to assess the effect of 2Hz EA on pain-related behaviors in SNI rats. Administration of 2Hz EA to SNI rats once every other day lasting for 21 days. Expression of spinal protein molecules were detected using Western blot and immunofluorescence staining. Results It was found that SNI significantly induced mechanical hypersensitivity and decrease of gait parameters, and subsequently increased the levels of HMGB1, TLR4, MyD88, and NF-κB p65 protein expression. 2Hz EA stimulation led to remarkable attenuation of mechanical hypersensitivity, upregulation of spinal HMGB1, TLR4, MyD88, and NF-κB p65 protein expressions induced by SNI, and significant improvement in gait parameters. Furthermore, immunofluorescence staining also confirmed that 2Hz EA obviously suppressed the co-expression of microglia activation marker CD11b and TLR4 or MyD88, as well as the activation of NF-κB p65 in SNI rats. Conclusion This study suggested that blockade of HMGB1/NF-κB signaling in the spinal cord may be a promising therapeutic approach for 2Hz EA management of SNI-induced neuropathic pain.
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Affiliation(s)
- Yang-Yang Xia
- Department of Physiology, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Meng Xue
- Department of Physiology, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Ying Wang
- Department of Physiology, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Zhi-Hua Huang
- Department of Physiology, Gannan Medical University, Ganzhou 341000, People's Republic of China.,Pain Medicine Research Institute, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Cheng Huang
- Department of Physiology, Gannan Medical University, Ganzhou 341000, People's Republic of China.,Pain Medicine Research Institute, Gannan Medical University, Ganzhou 341000, People's Republic of China
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147
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Huang L, Wang L. Upregulation of miR-183 represses neuropathic pain through inhibiton of MAP3K4 in CCI rat models. J Cell Physiol 2019; 235:3815-3822. [PMID: 31602666 DOI: 10.1002/jcp.29276] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 09/27/2019] [Indexed: 12/17/2022]
Abstract
Many studies have verified that microRNAs contribute a lot to neuropathic pain progression. Furthermore, nerve-related inflammatory cytokines play vital roles in neuropathic pain progression. miR-183 has been identified to have a common relationship with multiple pathological diseases. However, the potential effects of miR-183 in the process of neuropathic pain remain undetermined. Therefore, we performed the current study with the purpose of finding the functions of miR-183 in neuropathic pain progression using a chronic sciatic nerve injury (CCI) rat model. We demonstrated that miR-183 expression levels were evidently reduced in CCI rats in contrast with the control group. Overexpression of miR-183 produced significant relief of mechanical hyperalgesia, as well as thermal hyperalgesia in CCI rats. Furthermore, neuropathic pain-correlated inflammatory cytokine expression levels containing interleukin-6 (IL-6) and interleukin-1β (IL-1β), cyclooxygenase-2 (COX-2) were obviously inhibited by upregulation of miR-183. Meanwhile, dual-luciferase reporter assays showed MAP3K4 was a direct downstream gene of miR-183. The expression levels of MAP3K4 were modulated by the increased miR-183 negatively, which lead to the downregulation of IL-6, IL-1β, and COX-2, and then reduced neuropathic pain progression, respectively. Overall, our study pointed out that miR-183 was a part of the negative regulator which could relieve neuropathic pain by targeting MAP3K4. Thus it may provide a new clinical treatment for neuropathic pain patients clinical therapy.
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Affiliation(s)
- Lili Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Li Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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148
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Lee JY, Choi HY, Park CS, Jang C, Lee KT, Lee JY, Youn I, Yune TY. Inhibition of COX-2 alleviates lumbar spinal stenosis-induced chronic mechanical allodynia in rats. Int Immunopharmacol 2019; 75:105738. [DOI: 10.1016/j.intimp.2019.105738] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 01/30/2023]
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149
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You H, Zhang L, Chen Z, Liu W, Wang H, He H. MiR‐20b‐5p relieves neuropathic pain by targeting Akt3 in a chronic constriction injury rat model. Synapse 2019; 73:e22125. [PMID: 31381191 DOI: 10.1002/syn.22125] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Haiping You
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
| | - Lihong Zhang
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
| | - Zhiyuan Chen
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
| | - Weifeng Liu
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
| | - Honggeng Wang
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
| | - Hefan He
- Department of Anesthesiology The Second Affiliated Hospital of Fujian Medical University Quanzhou China
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150
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Gopalsamy B, Sambasevam Y, Zulazmi NA, Chia JSM, Omar Farouk AA, Sulaiman MR, Tengku Mohamad TAS, Perimal EK. Experimental Characterization of the Chronic Constriction Injury-Induced Neuropathic Pain Model in Mice. Neurochem Res 2019; 44:2123-2138. [DOI: 10.1007/s11064-019-02850-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 07/03/2019] [Accepted: 07/29/2019] [Indexed: 02/03/2023]
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