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Romero-García PA, Ramirez-Perez S, Miguel-González JJ, Guzmán-Silahua S, Castañeda-Moreno JA, Komninou S, Rodríguez-Lara SQ. Complementary and Alternative Medicine (CAM) Practices: A Narrative Review Elucidating the Impact on Healthcare Systems, Mechanisms and Paediatric Applications. Healthcare (Basel) 2024; 12:1547. [PMID: 39120250 PMCID: PMC11311728 DOI: 10.3390/healthcare12151547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/29/2024] [Accepted: 07/03/2024] [Indexed: 08/10/2024] Open
Abstract
While research on complementary and alternative medicine (CAM) for the general population is expanding, there remains a scarcity of studies investigating the efficacy and utilisation of CAM practices, specifically in the paediatric population. In accordance with the World Health Organization (WHO), the prevalence of the parental utilisation of CAM in their dependents is estimated to reach up to 80%. This literature review identified broad, heterogeneous, and inconclusive evidence regarding CAM's applications and effectiveness, primarily attributed to variance in sociodemographic factors and differences in national healthcare systems. Additionally, the review identified a lack of consensus and polarised positions among mainstream professionals regarding the mechanisms of action, applications, and effectiveness of CAM. This narrative review presents varied results concerning the efficacy of most CAM therapies and their applications; however, some evidence suggests potential benefits for acupuncture, yoga, tai chi, and massage in improving physical and mental health. Moreover, the available evidence indicates that meditation may enhance mental health, while reiki may only influence patients' perceptions of comfort. In light of the intricate and multifaceted nature of herbal medicine, it is imperative to assess its efficacy on a case-by-case basis, taking into account the specific compounds and procedures involved. This comprehensive review serves as a valuable resource for health professionals, offering guidance for personalised healthcare approaches that consider the values and beliefs of patients, thereby facilitating integrated, evidence-based practices aimed at enhancing the quality of healthcare services and patient satisfaction.
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Affiliation(s)
- Patricia Anaid Romero-García
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
| | - Sergio Ramirez-Perez
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
- Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), CUCS, Universidad de Guadalajara, Guadalajara 44100, Jalisco, Mexico
| | - Jorge Javier Miguel-González
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
- Departamento de Investigación, Instituto Cardiovascular de Mínima Invasión (ICMI), Zapopan 45116, Jalisco, Mexico
| | - Sandra Guzmán-Silahua
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
- Unidad de Investigación Epidemiológica y en Servicios de Salud, CMNO OOAD Jalisco Instituto Mexicano del Seguro Social, Guadalajara 44160, Jalisco, Mexico
| | - Javier Adan Castañeda-Moreno
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
| | - Sophia Komninou
- Faculty of Health and Life Science, Swansea University, Swansea SA2 8PP, UK;
| | - Simón Quetzalcoatl Rodríguez-Lara
- School of Medicine, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico; (S.R.-P.); (J.J.M.-G.); (S.G.-S.); (J.A.C.-M.)
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Kim IY, Park CS, Seo KJ, Lee JY, Yune TY. TRPM7 Mediates Neuropathic Pain by Activating mTOR Signaling in Astrocytes after Spinal Cord Injury in Rats. Mol Neurobiol 2024; 61:5265-5281. [PMID: 38180616 DOI: 10.1007/s12035-023-03888-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/14/2023] [Indexed: 01/06/2024]
Abstract
In this study, we investigated whether transient receptor melastatin 7 (TRPM7), known as a non-selective cation channel, inhibits neuropathic pain after spinal cord injury (SCI) and how TRPM7 regulates neuropathic pain. Neuropathic pain was developed 4 weeks after moderate contusive SCI and TRPM7 was markedly upregulated in astrocytes in the lamina I and II of L4-L5 dorsal horn. In addition, both mechanical allodynia and thermal hyperalgesia were significantly alleviated by a TRPM7 inhibitor, carvacrol. In particular, carvacrol treatment inhibited mechanistic target of rapamycin (mTOR) signaling, which was activated in astrocytes. When rats were treated with rapamycin, an inhibitor of mTOR signaling, neuropathic pain was significantly inhibited. Furthermore, blocking TRPM7 and mTOR signaling by carvacrol and rapamycin inhibited astrocyte activation in lamina I and II of dorsal spinal cord and reduced the level of p-JNK and p-c-Jun, which are known to be activated in astrocytes. Finally, inhibiting TRPM7/mTOR signaling also downregulated the production of pain-related factors such as tumor necrosis factor-α, interleukin-6, interleukin-1β, chemokine (C-C motif) ligand (CCL) 2, CCL-3, CCL-4, CCL-20, chemokine C-X-C motif ligand 1, and matrix metalloproteinase 9 which are known to be involved in the induction and/or maintenance of neuropathic pain after SCI. These results suggest an important role of TRPM7-mediated mTOR signaling in astrocyte activation and thereby induction and/or maintenance of neuropathic pain after SCI.
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Affiliation(s)
- In Yi Kim
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Medical Building 10th Floor, Dongdaemun-Gu, Hoegi-Dong 1, Seoul, 02447, Republic of Korea
- Department of Biomedical Science, Kyung Hee University, Seoul, 02447, Republic of Korea
- Biomedical Science Institute, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Chan Sol Park
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Medical Building 10th Floor, Dongdaemun-Gu, Hoegi-Dong 1, Seoul, 02447, Republic of Korea
- Department of Biomedical Science, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Kyung Jin Seo
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Medical Building 10th Floor, Dongdaemun-Gu, Hoegi-Dong 1, Seoul, 02447, Republic of Korea
- Department of Biomedical Science, Kyung Hee University, Seoul, 02447, Republic of Korea
- Biomedical Science Institute, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Jee Youn Lee
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Medical Building 10th Floor, Dongdaemun-Gu, Hoegi-Dong 1, Seoul, 02447, Republic of Korea.
| | - Tae Young Yune
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Medical Building 10th Floor, Dongdaemun-Gu, Hoegi-Dong 1, Seoul, 02447, Republic of Korea.
- Department of Biomedical Science, Kyung Hee University, Seoul, 02447, Republic of Korea.
- Biomedical Science Institute, Kyung Hee University, Seoul, 02447, Republic of Korea.
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea.
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Cui H, Wang Y, Ma J, Zhou L, Li G, Li Y, Sun Y, Shen J, Ma T, Wang Q, Feng X, Dong B, Yang P, Li Y, Ma X. Advances in exosome modulation of ferroptosis for the treatment of orthopedic diseases. Pathol Res Pract 2024; 257:155312. [PMID: 38663177 DOI: 10.1016/j.prp.2024.155312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 04/09/2024] [Accepted: 04/15/2024] [Indexed: 05/12/2024]
Abstract
Current treatments for orthopaedic illnesses frequently result in poor prognosis, treatment failure, numerous relapses, and other unpleasant outcomes that have a significant impact on patients' quality of life. Cell-free therapy has emerged as one of the most promising options in recent decades for improving the status quo. As a result, using exosomes produced from various cells to modulate ferroptosis has been proposed as a therapeutic method for the condition. Exosomes are extracellular vesicles that secrete various bioactive chemicals that influence disease treatment and play a role in the genesis and progression of orthopaedic illnesses. Ferroptosis is a recently defined kind of controlled cell death typified by large iron ion buildup and lipid peroxidation. An increasing number of studies indicate that ferroptosis plays a significant role in orthopaedic illnesses. Exosomes, as intercellular information transfer channels, have been found to play a significant role in the regulation of ferroptosis processes. Furthermore, accumulating research suggests that exosomes can influence the course of many diseases by regulating ferroptosis in injured cells. In order to better understand the processes by which exosomes govern ferroptosis in the therapy of orthopaedic illnesses. This review discusses the biogenesis, secretion, and uptake of exosomes, as well as the mechanisms of ferroptosis and exosomes in the therapy of orthopaedic illnesses. It focuses on recent research advances and exosome mechanisms in regulating iron death for the therapy of orthopaedic illnesses. The present state of review conducted both domestically and internationally is elucidated and anticipated as a viable avenue for future therapy in the field of orthopaedics.
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Affiliation(s)
- Hongwei Cui
- Tianjin Medical University Orthopedic Clinical College, Tianjin 300050, China; Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Yan Wang
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Jianxiong Ma
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China.
| | - Liyun Zhou
- Tianjin Medical University Orthopedic Clinical College, Tianjin 300050, China; Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Guang Li
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Yiyang Li
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Yadi Sun
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Jiahui Shen
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Tiancheng Ma
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Qiyu Wang
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Xiaotian Feng
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Benchao Dong
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Peichuan Yang
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Yan Li
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
| | - Xinlong Ma
- Tianjin Hospital of Tianjin University (Tianjin Hospital), Tianjin 300211, China; Tianjin Orthopedic Institute, Tianjin 300050, China; Tianjin Key Laboratory of Orthopedic Biomechanics and Medical Engineering, Tianjin 300050, China
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Li XC, Chen H, Chen Y, Chu YX, Mi WL, Wang YQ, Mao-Ying QL. Spinal Neuronal miR-124 Inhibits Microglial Activation and Contributes to Preventive Effect of Electroacupuncture on Chemotherapy-Induced Peripheral Neuropathy in Mice. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:410-420. [PMID: 38088802 DOI: 10.4049/jimmunol.2300539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 11/16/2023] [Indexed: 01/18/2024]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a persistent and irreversible side effect of antineoplastic agents. Patients with CIPN usually show chronic pain and sensory deficits with glove-and-stocking distribution. However, whether spinal neuronal microRNA (miR)-124 is involved in cisplatin-induced peripheral neuropathy remains to be studied. In this study, miR-124 was significantly reduced in the spinal dorsal horn in CIPN mice. Overexpression of neuronal miR-124 induced by injecting adeno-associated virus with neuron-specific promoter into the spinal cord of mice prevented the development of mechanical allodynia, sensory deficits, and the loss of intraepidermal nerve fibers induced by cisplatin. Meanwhile, cisplatin-induced M1 microglia activation and the release of proinflammatory cytokines were significantly inhibited by overexpression of neuronal miR-124. Furthermore, electroacupuncture (EA) treatment upregulated miR-124 expression in the spinal dorsal horn of CIPN mice. Interestingly, downregulation of spinal neuronal miR-124 significantly inhibited the regulatory effect of EA on CIPN and microglia activity as well as spinal neuroinflammation induced by cisplatin. These results demonstrate that spinal neuronal miR-124 is involved in the prevention and treatment of EA on cisplatin-induced peripheral neuropathy in mice. Our findings suggest that spinal neuronal miR-124 might be a potential target for EA effect, and we provide, to our knowledge, a new experimental basis for EA prevention of CIPN.
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Affiliation(s)
- Xiao-Chen Li
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Hui Chen
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Yu Chen
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Yu-Xia Chu
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, People's Republic of China
| | - Wen-Li Mi
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, People's Republic of China
| | - Yan-Qing Wang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, People's Republic of China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, People's Republic of China
| | - Qi-Liang Mao-Ying
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture Research, Institutes of Integrative Medicine, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, People's Republic of China
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Wang D, Qian W, Wu D, Wu Y, Lu K, Zou G. METTL3 promotes microglial inflammation via MEF2C in spinal cord injury. Cell Tissue Res 2024; 395:189-197. [PMID: 38180567 DOI: 10.1007/s00441-023-03855-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 12/20/2023] [Indexed: 01/06/2024]
Abstract
Spinal cord injury (SCI) is a significant contributor to disability in contemporary society, resulting in substantial psychological and economic burdens for patients and their family. Microglia-mediated inflammation is an important factor affecting the nerve repair of SCI patients. N6-methyladenosine (m6A) is a prevalent epigenetic modification in mammals, which shows a strong association with inflammation. However, the mechanism of m6A modification regulating microglia-mediated inflammation is still unclear. Here, we observed that METTL3, a m6A methylase, was increased in SCI mice and lipopolysaccharide (LPS)-exposed BV2 cells. Knockdown of METTL3 inhibited the increased expression of iNOS and IL-1β induced by LPS in vitro. Subsequently, MEF2C, myocyte-specific enhancer factor 2C, was decreased in SCI mice and LPS-exposed BV2 cells. Knockdown of MEF2C promoted the expression of iNOS and IL-1β. Sequence analysis showed that there were multiple highly confident m6A modification sites on the MEF2C mRNA. METTL3 antibody could pull down a higher level of MEF2C mRNA than the IgG in RNA binding protein immunoprecipitation assay. Knockdown of METTL3 promoted MEF2C protein expression and MEF2C mRNA expression, accompanied by a reduced m6A modification level on the MEF2C mRNA. Knockdown of MEF2C inhibited the anti-inflammatory effect of METTL3 siRNA. Our results suggest that METTL3 promotes microglia inflammation via regulating MEF2C mRNA m6A modification induced by SCI and LPS treatment.
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Affiliation(s)
- Dongliang Wang
- Department of Spinal Surgery, Yancheng First People's Hospital, Yancheng, 224006, China
| | - Wei Qian
- Department of Infectious Diseases, Yancheng Third People's Hospital, Yancheng, 224051, China
| | - Duanrong Wu
- Department of Orthopedics, Yancheng First People's Hospital, Yancheng, 224006, China
| | - Ya Wu
- Department of Orthopedics, Yancheng First People's Hospital, Yancheng, 224006, China
| | - Kun Lu
- Department of Orthopedics, Yancheng First People's Hospital, Yancheng, 224006, China
| | - Guoyou Zou
- Department of Orthopedics, Yancheng First People's Hospital, Yancheng, 224006, China.
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Ling G, Zhang M, Chen C, Wang Y, Gao Q, Li J, Yuan H, Jin W, Lin W, Yang L. Progress of Ginsenoside Rb1 in neurological disorders. Front Pharmacol 2024; 15:1280792. [PMID: 38327982 PMCID: PMC10847293 DOI: 10.3389/fphar.2024.1280792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 01/11/2024] [Indexed: 02/09/2024] Open
Abstract
Ginseng is frequently used in traditional Chinese medicine to treat neurological disorders. The primary active component of ginseng is ginsenoside, which has been classified into more than 110 types based on their chemical structures. Ginsenoside Rb1 (GsRb1)-a protopanaxadiol saponin and a typical ginseng component-exhibits anti-inflammatory, anti-oxidant, anti-apoptotic, and anti-autophagy properties in the nervous system. Neurological disorders remain a leading cause of death and disability globally. GsRb1 effectively treats neurological disorders. To contribute novel insights to the understanding and treatment of neurological disorders, we present a comprehensive review of the pharmacokinetics, actions, mechanisms, and research development of GsRb1 in neurological disorders.
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Affiliation(s)
- Gongxia Ling
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Min Zhang
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chizhang Chen
- Department of Clinical Medicine, Pingyang County Traditional Chinese Medicine Hospital, Meizhou, Zhejiang, China
| | - Yan Wang
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qiqi Gao
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jianshun Li
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Hao Yuan
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Wenwen Jin
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Wei Lin
- Department of Pediatrics, The Second School of Medicine, Wenzhou Medical University, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lingrong Yang
- Department of Pediatrics, Sichuan Provincial Maternity and Child Health Care Hospital, Chengdu Medical College, Chengdu, Sichuan, China
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Park SY, Jung JH, Kim DS, Lee JK, Song BG, Shin HE, Jung JW, Baek SW, You S, Han I, Han DK. Therapeutic potential of luteolin-loaded poly(lactic-co-glycolic acid)/modified magnesium hydroxide microsphere in functional thermosensitive hydrogel for treating neuropathic pain. J Tissue Eng 2024; 15:20417314231226105. [PMID: 38333057 PMCID: PMC10851718 DOI: 10.1177/20417314231226105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 12/27/2023] [Indexed: 02/10/2024] Open
Abstract
Neuropathic pain (NP) is a debilitating condition stemming from damage to the somatosensory system frequently caused by nerve injuries or lesions. While existing treatments are widely employed, they often lead to side effects and lack specificity. This study aimed to alleviate NP by developing an innovative sustained-release thermosensitive hydrogel system. The system incorporates hyaluronic acid (HA)/Pluronic F127 injectable hydrogel and bupivacaine (Bup, B) in combination with poly(lactic-co-glycolic acid; PLGA)/modified magnesium hydroxide (MH)/luteolin (Lut; PML) microspheres (PML@B/Gel). The PML@B/Gel was designed for localized and prolonged co-delivery of Bup and Lut as an anesthetic and anti-inflammatory agent, respectively. Our studies demonstrated that PML@B/Gel had exceptional biocompatibility, anti-inflammatory, and antioxidant properties. In addition, it exhibited efficient pain relief in in vitro cellular assays. Moreover, this functional hydrogel showed substantial sustained drug release while diminishing microglial activation. Consequently, it effectively mitigated mechanical allodynia and thermal hyperalgesia in in vivo rat models of chronic constriction injury (CCI). Based on our research findings, PML@B/Gel emerges as a promising therapeutic approach for the protracted treatment of NP.
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Affiliation(s)
- So-Yeon Park
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Korea
| | - Joon Hyuk Jung
- Department of Life Science, CHA University School of Medicine, Seongnam-si, Gyeonggi-do, Korea
| | - Da-Seul Kim
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, Brigham and Women’s Hospital, Cambridge, MA, USA
| | - Jun-Kyu Lee
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Byeong Gwan Song
- Department of Life Science, CHA University School of Medicine, Seongnam-si, Gyeonggi-do, Korea
| | - Hae Eun Shin
- Department of Life Science, CHA University School of Medicine, Seongnam-si, Gyeonggi-do, Korea
| | - Ji-Won Jung
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Seung-Woon Baek
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Seungkwon You
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Korea
| | - Inbo Han
- Department of Neurosurgery, CHA University School of Medicine, CHA Bundang Medical Center, Seongnam-si, Gyeonggi-do, Korea
| | - Dong Keun Han
- Department of Biomedical Science, CHA University, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
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Ramos D, Cruz CD. Involvement of microglia in chronic neuropathic pain associated with spinal cord injury - a systematic review. Rev Neurosci 2023; 34:933-950. [PMID: 37490300 DOI: 10.1515/revneuro-2023-0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 06/10/2023] [Indexed: 07/26/2023]
Abstract
In recent decade microglia have been found to have a central role in the development of chronic neuropathic pain after injury to the peripheral nervous system. It is widely accepted that peripheral nerve injury triggers microglial activation in the spinal cord, which contributes to heightened pain sensation and eventually chronic pain states. The contribution of microglia to chronic pain arising after injury to the central nervous system, such as spinal cord injury (SCI), has been less studied, but there is evidence supporting microglial contribution to central neuropathic pain. In this systematic review, we focused on post-SCI microglial activation and how it is linked to emergence and maintenance of chronic neuropathic pain arising after SCI. We found that the number of studies using animal SCI models addressing microglial activity is still small, compared with the ones using peripheral nerve injury models. We have collected 20 studies for full inclusion in this review. Many mechanisms and cellular interactions are yet to be fully understood, although several studies report an increase of density and activity of microglia in the spinal cord, both in the vicinity of the injury and in the spared spinal tissue, as well as in the brain. Changes in microglial activity come with several molecular changes, including expression of receptors and activation of signalling pathways. As with peripheral neuropathic pain, microglia seem to be important players and might become a therapeutic target in the future.
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Affiliation(s)
- David Ramos
- Faculty of Medicine of Porto, University of Porto, Porto, Portugal
- Department of Biomedicine, Experimental Biology Unit, Department of Biomedicine, Faculty of Medicine of Porto, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Célia Duarte Cruz
- Department of Biomedicine, Experimental Biology Unit, Department of Biomedicine, Faculty of Medicine of Porto, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
- Translational Neurourology, IBMC and Instituto de Investigação e Inovação em Saúde-i3S, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
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9
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Lee JY, Park CS, Seo KJ, Kim IY, Han S, Youn I, Yune TY. IL-6/JAK2/STAT3 axis mediates neuropathic pain by regulating astrocyte and microglia activation after spinal cord injury. Exp Neurol 2023; 370:114576. [PMID: 37863306 DOI: 10.1016/j.expneurol.2023.114576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/02/2023] [Accepted: 10/16/2023] [Indexed: 10/22/2023]
Abstract
After spinal cord injury (SCI), the control of activated glial cells such as microglia and astrocytes has emerged as a promising strategy for neuropathic pain management. However, signaling mechanism involved in glial activation in the process of neuropathic pain development and maintenance after SCI is not well elucidated. In this study, we investigated the potential role and mechanism of the JAK2/STAT3 pathway associated with glial cell activation in chronic neuropathic pain development and maintenance after SCI. One month after contusive SCI, the activation of JAK2/STAT3 pathway was markedly upregulated in both microglia and astrocyte in nociceptive processing regions of the lumbar spinal cord. In addition, both mechanical allodynia and thermal hyperalgesia was significantly inhibited by a JAK2 inhibitor, AG490. In particular, AG490 treatment inhibited both microglial and astrocyte activation in the lumbar (L) 4-5 dorsal horn and significantly decreased levels of p-p38MAPK, p-ERK and p-JNK, which are known to be activated in microglia (p-p38MAPK and p-ERK) and astrocyte (p-JNK). Experiments using primary cell cultures also revealed that the JAK2/STAT3 pathway promoted microglia and astrocyte activation after lipopolysaccharide stimulation. Furthermore, JAK2/STAT3 signaling and pain behaviors were significantly attenuated when the rats were treated with anti-IL-6 antibody. Finally, minocycline, a tetracycline antibiotic, inhibited IL-6/JAK2/STAT3 signaling pathway in activated glial cells and restored nociceptive thresholds and the hyperresponsiveness of dorsal neurons. These results suggest an important role of the IL-6/JAK2/STAT3 pathway in the activation of microglia and astrocytes and in the maintenance of chronic below-level pain after SCI.
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Affiliation(s)
- Jee Youn Lee
- Age-Related and Brain Diseases Research Center, School of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea
| | - Chan Sol Park
- Age-Related and Brain Diseases Research Center, School of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea; Department of Biomedical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Kyung Jin Seo
- Age-Related and Brain Diseases Research Center, School of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea; Department of Biomedical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - In Yi Kim
- Age-Related and Brain Diseases Research Center, School of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea; Department of Biomedical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Sungmin Han
- Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Inchan Youn
- Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Tae Young Yune
- Age-Related and Brain Diseases Research Center, School of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea; Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02453, Republic of Korea; Biomedical Science Institute, Kyung Hee University, Seoul 02447, Republic of Korea.
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10
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Santos JM, Wang R, Bhakta V, Driver Z, Vadim Y, Kiritoshi T, Ji G, Neugebauer V, Shen CL. Turmeric Bioactive Compounds Alleviate Spinal Nerve Ligation-Induced Neuropathic Pain by Suppressing Glial Activation and Improving Mitochondrial Function in Spinal Cord and Amygdala. Nutrients 2023; 15:4403. [PMID: 37892476 PMCID: PMC10610406 DOI: 10.3390/nu15204403] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/25/2023] [Accepted: 09/27/2023] [Indexed: 10/29/2023] Open
Abstract
This study examined the effects of turmeric bioactive compounds, curcumin C3 complex® (CUR) and bisdemethoxycurcumin (BDMC), on mechanical hypersensitivity and the gene expression of markers for glial activation, mitochondrial function, and oxidative stress in the spinal cord and amygdala of rats with neuropathic pain (NP). Twenty-four animals were randomly assigned to four groups: sham, spinal nerve ligation (SNL, an NP model), SNL+100 mg CUR/kg BW p.o., and SNL+50 mg BDMC/kg BW p.o. for 4 weeks. Mechanical hypersensitivity was assessed by the von Frey test (VFT) weekly. The lumbosacral section of the spinal cord and the right amygdala (central nucleus) were collected to determine the mRNA expression of genes (IBA-1, CD11b, GFAP, MFN1, DRP1, FIS1, PGC1α, PINK, Complex I, TLR4, and SOD1) utilizing qRT-PCR. Increased mechanical hypersensitivity and increased gene expression of markers for microglial activation (IBA-1 in the amygdala and CD11b in the spinal cord), astrocyte activation (GFAP in the spinal cord), mitochondrial dysfunction (PGC1α in the amygdala), and oxidative stress (TLR4 in the spinal cord and amygdala) were found in untreated SNL rats. Oral administration of CUR and BDMC significantly decreased mechanical hypersensitivity. CUR decreased CD11b and GFAP gene expression in the spinal cord. BDMC decreased IBA-1 in the spinal cord and amygdala as well as CD11b and GFAP in the spinal cord. Both CUR and BDMC reduced PGC1α gene expression in the amygdala, PINK1 gene expression in the spinal cord, and TLR4 in the spinal cord and amygdala, while they increased Complex I and SOD1 gene expression in the spinal cord. CUR and BDMC administration decreased mechanical hypersensitivity in NP by mitigating glial activation, oxidative stress, and mitochondrial dysfunction.
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Affiliation(s)
- Julianna M. Santos
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (J.M.S.); (R.W.)
| | - Rui Wang
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (J.M.S.); (R.W.)
| | - Viren Bhakta
- Department of Biochemistry, Texas Tech University, Lubbock, TX 79409, USA (Z.D.)
| | - Zarek Driver
- Department of Biochemistry, Texas Tech University, Lubbock, TX 79409, USA (Z.D.)
| | - Yakhnitsa Vadim
- Department of Pharmacology and Neurosciences, Texas Tech University Health Science Center, Lubbock, TX 79430, USA; (Y.V.); (T.K.); (G.J.); (V.N.)
| | - Takaki Kiritoshi
- Department of Pharmacology and Neurosciences, Texas Tech University Health Science Center, Lubbock, TX 79430, USA; (Y.V.); (T.K.); (G.J.); (V.N.)
| | - Guangchen Ji
- Department of Pharmacology and Neurosciences, Texas Tech University Health Science Center, Lubbock, TX 79430, USA; (Y.V.); (T.K.); (G.J.); (V.N.)
| | - Volker Neugebauer
- Department of Pharmacology and Neurosciences, Texas Tech University Health Science Center, Lubbock, TX 79430, USA; (Y.V.); (T.K.); (G.J.); (V.N.)
- Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (J.M.S.); (R.W.)
- Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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11
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Wu Q, Zheng Y, Yu J, Ying X, Gu X, Tan Q, Tu W, Lou X, Yang G, Li M, Jiang S. Electroacupuncture alleviates neuropathic pain caused by SNL by promoting M2 microglia polarization through PD-L1. Int Immunopharmacol 2023; 123:110764. [PMID: 37573685 DOI: 10.1016/j.intimp.2023.110764] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/26/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023]
Abstract
As a common clinical disease, neuropathic pain is difficult to be cured with drugs. The occurrence and progression of pain is closely related to the response of spinal microglia. Aspartof the regulation of microglialactivity,PD-L1 playsacriticalrole. Loss of PD-L1 promoted the polarization of M1-like microglia. Increased expression of PD-L1 promoted M2-like polarization. Electroacupuncture has a significant analgesic effect in clinical practice, but its specific mechanism remains to be further explored. In this study, we verified the role of PD-L1 in EA analgesia and the underlying molecular mechanism through spinal nerve ligation (SNL) in rats and lipopolysaccharide (LPS)-treated BV2 microglial cells. Forbehavioralstudiesofrats,mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) were measured, and spinal cord neuros were examined under transmission electron microscopyto determine changes to their myelin structure. The expression levels of PD-L1 and M1/M2-specific markers in rat spinal cord and BV2 microglial cells were measured by enzyme-linked immunosorbent assay, flow cytometry, immunofluorescence staining and Western blot analysis. Our study showed that EA increased the pain threshold, reduced the destruction of myelin structure, promoted the expression of PD-L1 and PD-1, inhibited the MAPK signaling pathway, and promoted the conversion of microglial polarization from the M1 phenotype to the M2 phenotype in SNL rats. PD-L1 knockdown reversed these effects of EA. In addition, PD-L1 knockdown activated the MAPK signaling pathway, promoted microglial polarization to the M1 phenotype, decreased the expression of anti-inflammatory mediators and increased the expression of proinflammatory factors in LPS-stimulated BV2 microglial cells. Our results showed that EA may regulate the excitability of primary afferent neurons through PD-L1 and then inhibit the MAPK signaling pathway to promote the transformation of activated M1 microglia into M2 microglia, reduce inflammatory reactions, and finally achieve analgesic effects. A therapy targeting PD-L1 may be an effective strategy for treating neuropathic pain.
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Affiliation(s)
- Qiaoyun Wu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Yujun Zheng
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Jiaying Yu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Xinwang Ying
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Xiaoxue Gu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Qianqian Tan
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Wenzhan Tu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Xinfa Lou
- Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Guanhu Yang
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China
| | - Ming Li
- School of Basic Medical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Songhe Jiang
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; The Wenzhou Key Laboratory for Rehabilitation Research, The Provincial Key Laboratory for Acupuncture and Rehabilitation in Zhejiang Province, China.
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12
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Lee AG, Kang S, Yoon HJ, Im S, Oh SJ, Pak YK. Polystyrene Microplastics Exacerbate Systemic Inflammation in High-Fat Diet-Induced Obesity. Int J Mol Sci 2023; 24:12421. [PMID: 37569796 PMCID: PMC10419071 DOI: 10.3390/ijms241512421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
Microplastics (MPs) are recognized as environmental pollutants with potential implications for human health. Considering the rapid increase in obesity rates despite stable caloric intake, there is a growing concern about the link between obesity and exposure to environmental pollutants, including MPs. In this study, we conducted a comprehensive investigation utilizing in silico, in vitro, and in vivo approaches to explore the brain distribution and physiological effects of MPs. Molecular docking simulations were performed to assess the binding affinity of three plastic polymers (ethylene, propylene, and styrene) to immune cells (macrophages, CD4+, and CD8+ lymphocytes). The results revealed that styrene exhibited the highest binding affinity for macrophages. Furthermore, in vitro experiments employing fluorescence-labeled PS-MPs (fPS-MPs) of 1 μm at various concentrations demonstrated a dose-dependent binding of fPS-MPs to BV2 murine microglial cells. Subsequent oral administration of fPS-MPs to high-fat diet-induced obese mice led to the co-existence of fPS-MPs with immune cells in the blood, exacerbating impaired glucose metabolism and insulin resistance and promoting systemic inflammation. Additionally, fPS-MPs were detected throughout the brain, with increased activation of microglia in the hypothalamus. These findings suggest that PS-MPs significantly contribute to the exacerbation of systemic inflammation in high-fat diet-induced obesity by activating peripheral and central inflammatory immune cells.
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Affiliation(s)
| | - Sora Kang
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; (S.K.); (H.J.Y.)
| | - Hye Ji Yoon
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; (S.K.); (H.J.Y.)
| | - Suyeol Im
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447,Republic of Korea; (S.I.); (S.J.O.)
| | - Seung Jun Oh
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447,Republic of Korea; (S.I.); (S.J.O.)
| | - Youngmi Kim Pak
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; (S.K.); (H.J.Y.)
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447,Republic of Korea; (S.I.); (S.J.O.)
- Department of Physiology, School of Medicine, Biomedical Science Institute, Kyung Hee University, Seoul 02447, Republic of Korea
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13
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Hu J, Wang X, Jia S, Kong L, Wang Y, Xin X, Hu Y, Chen X. Acupuncture and related therapies for tension-type headache: a systematic review and network meta-analysis. Front Neurol 2023; 14:1194441. [PMID: 37426434 PMCID: PMC10325685 DOI: 10.3389/fneur.2023.1194441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
Background Tension-type headache (TTH) is one of the most common primary headaches. Several studies have confirmed the efficacy of acupuncture therapies for TTH, but it is uncertain which treatment is most effective. Objective This study aimed to compare the effectiveness and safety of different acupuncture therapies for TTH using Bayesian Network Meta-analysis to provide new ideas for treating TTH. Methods Nine databases were searched for randomized controlled trials (RCTs) about different acupuncture therapies for TTH up to December 1, 2022. The outcome indicators analyzed in our study were total effective rate, visual analog scale (VAS), headache frequency, and safety. Pairwise meta-analysis and risk of bias assessment were performed using Review Manager 5.4. Stata 15.0 generated a network evidence plot and detected publication bias. Finally, a Bayesian network meta-analysis of the data was used by RStudio. Results The screening process resulted in 30 RCTs that met the inclusion criteria, including 2,722 patients. Most studies failed to report details of trials and were therefore assessed as unclear risks. Two studies were considered high risk because they did not report on all pre-specified outcome indicators or had incomplete data on outcome indicators. The NMA results showed that for total effective rate, bloodletting therapy had the most considerable SUCRA value (0.93156136), for VAS, head acupuncture combined with Western medicine ranked first (SUCRA = 0.89523571), and acupuncture combined with herbal medicine was the most effective in improving headache frequency (p > 0.05). Conclusion Acupuncture can be used as one of the complementary or alternative therapies for TTH; bloodletting therapy better improves the overall symptoms of TTH, head acupuncture combined with Western medicine is more effective in reducing VAS scores, and acupuncture combined with herbal medicine seems to reduce headache frequency, but the difference is not statistically significant. Overall, acupuncture for TTH is effective with mild side effects, but future high-quality studies are still necessary. Systematic review registration https://www.crd.york.ac.uk/prospero/, PROSPERO [CRD42022368749].
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Affiliation(s)
- Jinglin Hu
- College of Acupuncture and Tuina, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Xichen Wang
- School of Medical Information, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Siqi Jia
- College of Acupuncture and Tuina, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Lingzu Kong
- College of Acupuncture and Tuina, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Yining Wang
- College of Acupuncture and Tuina, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Xiaoqi Xin
- College of Acupuncture and Tuina, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Yinghua Hu
- Teaching and Research Office of Acupuncture and Tuina, Changchun University of Traditional Chinese Medicine, Changchun, Jilin, China
| | - Xinhua Chen
- The Affiliated Hospital of Changchun University of Traditional Chinese Medicine, Changchun, Jilin, China
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14
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Cui Y, Zhou X, Li Q, Wang D, Zhu J, Zeng X, Han Q, Yang R, Xu S, Zhang D, Meng X, Zhang S, Sun Z, Yin H. Efficacy of different acupuncture therapies on postherpetic neuralgia: A Bayesian network meta-analysis. Front Neurosci 2023; 16:1056102. [PMID: 36704010 PMCID: PMC9871906 DOI: 10.3389/fnins.2022.1056102] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/16/2022] [Indexed: 01/11/2023] Open
Abstract
Background Postherpetic neuralgia (PHN) is a common, complex, and refractory type of neuropathic pain. Several systematic reviews support the efficacy of acupuncture and related treatments for PHN. Nevertheless, the efficacy of various acupuncture-related treatments for PHN remains debatable. Objective We aimed to assess the efficacy and safety of acupuncture-related treatments for PHN, identify the most effective acupuncture-related treatments, and expound on the current inadequacies and prospects in the applications of acupuncture-related therapies. Methods We searched PubMed, Cochrane Central Register of Controlled Trials, Embase, Web of Science, Google Scholar, four Chinese databases (China National Knowledge Infrastructure, China Biomedical, Chongqing VIP, and Wan Fang databases), clinical research registration platform (World Health Organization International Clinical Trial Registration platform, China Clinical Trial Registration Center) for relevant studies. We also examined previous meta-analyses; gray literature; and reference lists of the selected studies. We then evaluated the risk of bias in the included studies and performed a Bayesian multiple network meta-analysis. Results We included 29 randomized controlled trials comprising 1,973 patients, of which five studies showed a high risk of bias. The pairwise meta-analysis results revealed that the efficacy of all acupuncture-related treatments for pain relief related to PHN was significantly better than antiepileptics. The network meta-analysis results showed that pricking and cupping plus antiepileptics were the most effective treatment, followed by electroacupuncture (EA) plus antiepileptics for pain relief in patients with PHN. EA plus antiepileptics ranked the best regarding reduced Pittsburgh Sleep Quality Index (PSQI) and Self-Rating Depression Scale (SDS) scores in patients with PHN. No results were found regarding the total response rate or quality of life in this study. Acupuncture-related treatments showed a lower incidence of adverse events than that of antiepileptics. Conclusion Acupuncture-related therapies are potential treatment options for PHN and are safe. Pricking and cupping plus antiepileptics, are the most effective acupuncture-related techniques for pain relief, while EA plus antiepileptics is the best acupuncture-related technique for improving PHN-related insomnia and depression symptoms. However, owing to the limitations of this study, these conclusions should be cautiously interpreted, and future high-quality studies are needed. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021226422, identifier CRD42021226422.
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Affiliation(s)
- Yang Cui
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xinyu Zhou
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Quan Li
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Delong Wang
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Jiamin Zhu
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xiangxin Zeng
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Qichen Han
- The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Rui Yang
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Siyu Xu
- The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Dongxu Zhang
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xiangyue Meng
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Shuo Zhang
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Zhongren Sun
- Heilongjiang University of Chinese Medicine, Harbin, China,The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China,Zhongren Sun,
| | - Hongna Yin
- The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China,*Correspondence: Hongna Yin,
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15
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Li S, Feng X, Bian H. Optogenetics: Emerging strategies for neuropathic pain treatment. Front Neurol 2022; 13:982223. [PMID: 36536805 PMCID: PMC9758006 DOI: 10.3389/fneur.2022.982223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 11/10/2022] [Indexed: 10/13/2023] Open
Abstract
Neuropathic pain (NP) is a chronic health condition that presents a significant burden on patients, society, and even healthcare systems. However, in recent years, an emerging field in the treatment of neuropathic pain - optogenetic technology has dawned, heralding a new era in the field of medicine, and which has brought with it unlimited possibilities for studying the mechanism of NP and the treatment of research. Optogenetics is a new and growing field that uses the combination of light and molecular genetics for the first time ever. This rare combination is used to control the activity of living cells by expressing photosensitive proteins to visualize signaling events and manipulate cell activity. The treatments for NP are limited and have hardly achieved the desirable efficacy. NP differs from other types of pain, such as nociceptive pain, in that the treatments for NP are far more complex and highly challenging for clinical practice. This review presents the background of optogenetics, current applications in various fields, and the findings of optogenetics in NP. It also elaborates on the basic concepts of neuropathy, therapeutic applications, and the potential of optogenetics from the bench to the bedside in the near future.
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Affiliation(s)
- Siyu Li
- Department of Physiology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan, China
| | - Xiaoli Feng
- Department of Physiology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan, China
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Hui Bian
- Department of Physiology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan, China
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16
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Ma X, Chen W, Yang NN, Wang L, Hao XW, Tan CX, Li HP, Liu CZ. Potential mechanisms of acupuncture for neuropathic pain based on somatosensory system. Front Neurosci 2022; 16:940343. [PMID: 36203799 PMCID: PMC9530146 DOI: 10.3389/fnins.2022.940343] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/29/2022] [Indexed: 12/04/2022] Open
Abstract
Neuropathic pain, caused by a lesion or disease of the somatosensory system, is common and distressing. In view of the high human and economic burden, more effective treatment strategies were urgently needed. Acupuncture has been increasingly used as an adjuvant or complementary therapy for neuropathic pain. Although the therapeutic effects of acupuncture have been demonstrated in various high-quality randomized controlled trials, there is significant heterogeneity in the underlying mechanisms. This review aimed to summarize the potential mechanisms of acupuncture on neuropathic pain based on the somatosensory system, and guided for future both foundational and clinical studies. Here, we argued that acupuncture may have the potential to inhibit neuronal activity caused by neuropathic pain, through reducing the activation of pain-related ion channels and suppressing glial cells (including microglia and astrocytes) to release inflammatory cytokines, chemokines, amongst others. Meanwhile, acupuncture as a non-pharmacologic treatment, may have potential to activate descending pain control system via increasing the level of spinal or brain 5-hydroxytryptamine (5-HT), norepinephrine (NE), and opioid peptides. And the types of endogenously opioid peptides was influenced by electroacupuncture-frequency. The cumulative evidence demonstrated that acupuncture provided an alternative or adjunctive therapy for neuropathic pain.
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Affiliation(s)
- Xin Ma
- School of Acupuncture-Moxibustion and Tuina, Shandong University of Traditional Chinese Medicine, Jinan, China
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Wen Chen
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Na-Na Yang
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Lu Wang
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Xiao-Wan Hao
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Chun-Xia Tan
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
| | - Hong-Ping Li
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
- Hong-Ping Li,
| | - Cun-Zhi Liu
- School of Acupuncture-Moxibustion and Tuina, Shandong University of Traditional Chinese Medicine, Jinan, China
- School of Acupuncture-Moxibustion and Tuina, International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, China
- *Correspondence: Cun-Zhi Liu,
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Huang Y, He K, Fang D, Ni F, Qiu B, Liang K, Ma R. A bibliometric of research trends in acupuncture for spinal cord injury: Quantitative and qualitative analyses. Front Neurol 2022; 13:936744. [PMID: 36188361 PMCID: PMC9521612 DOI: 10.3389/fneur.2022.936744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/23/2022] [Indexed: 11/29/2022] Open
Abstract
Introduction Spinal cord injury (SCI) is a severe disease of the central nervous system with a very high disability rate that seriously affects the daily life of patients. Acupuncture is one of the rehabilitation therapies that has shown significant efficacy in treating post-SCI complications such as motor disorders, neuropathic pain, and neurogenic bladder. Current studies have focused on the effectiveness and mechanisms of acupuncture for SCI, but no studies are available to analyze the bibliometrics of publications related to this area. Methods Publications related to acupuncture for SCI were retrieved from the Web of Science Core Collection for quantitative and qualitative analyses. The quantitative analysis was unfolded in the following six main areas: annual publications, countries, institutions, authors, sources, and keywords. The qualitative analysis section screened out publications with high annual citation rates and categorized them according to the study content. Results There were 213 relevant publications, more than half of which were journal articles. The number of publications showed a fluctuating upward trend. China and the United States were hub countries for related publications and had extensive cooperation with other countries. The most relevant author was Yuanshan Zeng from Sun Yat-sen University, China. The efficacy and mechanism of acupuncture for neuropathic pain after SCI was the first research hotspot in this field, and electroacupuncture was the most widely used technique. In the past 5 years, the mechanism of acupuncture to improve the local microenvironment of SCI and promote nerve regeneration had become a new research trend. At the same time, acupuncture had been gradually applied to various complications after SCI and in veterinary medicine. Conclusion The findings suggest that research on acupuncture for SCI is still flourishing, and more research on electroacupuncture for promoting nerve repair and regeneration after SCI will be available in the future.
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Affiliation(s)
- Yi Huang
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
| | - Kelin He
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
- Department of Acupuncture and Moxibustion, The Third Affiliated Hospital of Zhejiang Chinese Medical University (Zhongshan Hospital of Zhejiang Province), Hangzhou, China
| | - Dandan Fang
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
| | - Fengjia Ni
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
| | - Bei Qiu
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
| | - Kang Liang
- Department of Acupuncture and Moxibustion, The Third Affiliated Hospital of Zhejiang Chinese Medical University (Zhongshan Hospital of Zhejiang Province), Hangzhou, China
| | - Ruijie Ma
- Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third School of Clinical Medicine (School of Rehabilitation Medicine), Zhejiang Chinese Medical University, Hangzhou, China
- Department of Acupuncture and Moxibustion, The Third Affiliated Hospital of Zhejiang Chinese Medical University (Zhongshan Hospital of Zhejiang Province), Hangzhou, China
- *Correspondence: Ruijie Ma
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Xu S, Yi Y, Wang Y, Wang P, Zhao Y, Feng W. Dexmedetomidine Alleviates Neuropathic Pain via the TRPC6-p38 MAPK Pathway in the Dorsal Root Ganglia of Rats. J Pain Res 2022; 15:2437-2448. [PMID: 36016537 PMCID: PMC9397435 DOI: 10.2147/jpr.s378893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/15/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose Neuropathic pain is a chronic intractable disease characterized by allodynia and hyperalgesia. Effective treatments are unavailable because of the complicated mechanisms of neuropathic pain. Transient receptor potential canonical 6 (TRPC6) is a nonselective calcium (Ca2+)-channel protein related to hyperalgesia. Dexmedetomidine (Dex) is an alpha-2 (α2) adrenoreceptor agonist that mediates intracellular Ca2+ levels to alleviate pain. However, the relationship between TRPC6 and Dex is currently unclear. We speculated that the α2 receptor agonist would be closely linked to the TRPC6 channel. We aimed to investigate whether Dex relieves neuropathic pain by the TRPC6 pathway in the dorsal root ganglia (DRG). Methods The chronic constriction injury (CCI) model was established in male rats, and we evaluated the mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL). The expression of TRPC6 and Iba-1 in the DRG were analyzed using quantitative real-time polymerase chain reaction, Western blot, and immunofluorescence assay. The levels of inflammatory cytokines were measured using an enzyme-linked immunosorbent assay. Results Compared with the CCI normal saline group, both the MWT and TWL were significantly improved after 7 days of Dex administration. Results demonstrated that TRPC6 expression was increased in the DRG following CCI but was suppressed by Dex. In addition, multiple administrations of Dex inhibited the phosphorylation level of p38 mitogen-activated protein kinase and the upregulation of neuroinflammatory factors. Conclusion The results of this study demonstrated that Dex exhibits anti-nociceptive and anti-inflammatory properties in a neuropathic pain model. Moreover, our findings of the CCI model suggested that Dex has an inhibitory effect on TRPC6 expression in the DRG by decreasing the phosphorylation level of p38 in the DRG.
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Affiliation(s)
- Songchao Xu
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yusheng Yi
- Department of Algology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yanting Wang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Pei Wang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yang Zhao
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Wei Feng
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
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Lee AG, Kang S, Im S, Pak YK. Cinnamic Acid Attenuates Peripheral and Hypothalamic Inflammation in High-Fat Diet-Induced Obese Mice. Pharmaceutics 2022; 14:pharmaceutics14081675. [PMID: 36015301 PMCID: PMC9413375 DOI: 10.3390/pharmaceutics14081675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/02/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
Obesity is closely linked to chronic inflammation in peripheral organs and the hypothalamus. Chronic consumption of a high-fat diet (HFD) induces the differentiation of Ly6chigh monocytes into macrophages in adipose tissue, the liver, and the brain, as well as the secretion of pro-inflammatory cytokines. Although cinnamon improves obesity and related diseases, it is unclear which components of cinnamon can affect macrophages and inflammatory cytokines. We performed in silico analyses using ADME, drug-likeness, and molecular docking simulations to predict the active compounds of cinnamon. Among the 82 active compounds of cinnamon, cinnamic acid (CA) showed the highest score of ADME, blood–brain barrier permeability, drug-likeness, and cytokine binding. We then investigated whether CA modulates obesity-induced metabolic profiles and macrophage-related inflammatory responses in HFD-fed mice. While HFD feeding induced obesity, CA ameliorated obesity and related symptoms, such as epididymal fat gain, insulin resistance, glucose intolerance, and dyslipidemia, without hepatic and renal toxicity. CA also improved HFD-induced tumor necrosis factor-α, fat deposition, and macrophage infiltration in the liver and adipose tissue. CA decreased Ly6chigh monocytes, adipose tissue M1 macrophages, and hypothalamic microglial activation. These results suggest that CA attenuates the peripheral and hypothalamic inflammatory monocytes/macrophage system and treats obesity-related metabolic disorders.
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Affiliation(s)
| | - Sora Kang
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Suyeol Im
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Youngmi Kim Pak
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul 02447, Korea
- Correspondence: ; Tel.: +82-2-961-0908
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20
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Apoptosis and (in) Pain—Potential Clinical Implications. Biomedicines 2022; 10:biomedicines10061255. [PMID: 35740277 PMCID: PMC9219669 DOI: 10.3390/biomedicines10061255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/14/2022] [Accepted: 05/15/2022] [Indexed: 02/06/2023] Open
Abstract
The deregulation of apoptosis is involved in the development of several pathologies, and recent evidence suggests that apoptosis may be involved in chronic pain, namely in neuropathic pain. Neuropathic pain is a chronic pain state caused by primary damage or dysfunction of the nervous system; however, the details of the molecular mechanisms have not yet been fully elucidated. Recently, it was found that nerve endings contain transient receptor potential (TRP) channels that sense and detect signals released by injured tissues and respond to these damage signals. TRP channels are similar to the voltage-gated potassium channels or nucleotide-gated channels that participate in calcium and magnesium homeostasis. TRP channels allowing calcium to penetrate into nerve terminals can activate apoptosis, leading to nerve terminal destruction. Further, some TRPs are activated by acid and reactive oxygen species (ROS). ROS are mainly produced in the mitochondrial respiratory chain, and an increase in ROS production and/or a decrease in the antioxidant network may induce oxidative stress (OS). Depending on the OS levels, they can promote cellular proliferation and/or cell degeneration or death. Previous studies have indicated that proinflammatory cytokines, such as tumor necrosis factor-α (TNF-α), play an important role in the peripheral mediation of neuropathic pain. This article aims to perform a review of the involvement of apoptosis in pain, particularly the role of OS and neuroinflammation, and the clinical relevance of this knowledge. The potential discovery of new biomarkers and therapeutic targets can result in the development of more effective and targeted drugs to treat chronic pain, namely neuropathic pain. Highlights: Oxidative stress and neuroinflammation can activate cell signaling pathways that can lead to nerve terminal destruction by apoptosis. These could constitute potential new pain biomarkers and targets for therapy in neuropathic pain.
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21
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Jiang K, Sun Y, Chen X. Mechanism Underlying Acupuncture Therapy in Spinal Cord Injury: A Narrative Overview of Preclinical Studies. Front Pharmacol 2022; 13:875103. [PMID: 35462893 PMCID: PMC9021644 DOI: 10.3389/fphar.2022.875103] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/14/2022] [Indexed: 12/29/2022] Open
Abstract
Spinal cord injury (SCI) results from various pathogenic factors that destroy the normal structure and function of the spinal cord, subsequently causing sensory, motor, and autonomic nerve dysfunction. SCI is one of the most common causes of disability and death globally. It leads to severe physical and mental injury to patients and causes a substantial economic burden on families and the society. The pathological changes and underlying mechanisms within SCI involve oxidative stress, apoptosis, inflammation, etc. As a traditional therapy, acupuncture has a positive effect promoting the recovery of SCI. Acupuncture-induced neuroprotection includes several mechanisms such as reducing oxidative stress, inhibiting the inflammatory response and neuronal apoptosis, alleviating glial scar formation, promoting neural stem cell differentiation, and improving microcirculation within the injured area. Therefore, the recent studies exploring the mechanism of acupuncture therapy in SCI will help provide a theoretical basis for applying acupuncture and seeking a better treatment target and acupuncture approach for SCI patients.
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Affiliation(s)
- Kunpeng Jiang
- Department of Hand and Foot Surgery, Zhejiang Rongjun Hospital, Jiaxing, China
| | - Yulin Sun
- Department of Neurosurgery, Zhejiang Rongjun Hospital, Jiaxing, China
| | - Xinle Chen
- Department of Neurosurgery, Zhejiang Rongjun Hospital, Jiaxing, China
- *Correspondence: Xinle Chen,
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22
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Yan W, Liu W, Wu J, Wu L, Xuan S, Wang W, Shang A. Neuropeptide Y in the amygdala contributes to neuropathic pain-like behaviors in rats via the neuropeptide Y receptor type 2/mitogen-activated protein kinase axis. Bioengineered 2022; 13:8101-8114. [PMID: 35313782 PMCID: PMC9162000 DOI: 10.1080/21655979.2022.2051783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Neuropeptide Y (NPY) is a highly conserved endogenous peptide in the central and peripheral nervous systems, which has been implicated in nociceptive signaling in neuropathic pain. However, downstream mechanistic actions remain uncharacterized. In this study, we sought to investigate the mechanism of NPY and its receptor NPY2R in the amygdala in rats with neuropathic pain-like behaviors induced by chronic constriction injury (CCI) of the sciatic nerve. The expression of NPY and NPY2R was found to be aberrantly up-regulated in neuropathic pain-related microarray dataset. Further, NPY was found to act on NPY2R in the basolateral amygdala (BLA). As reflected by the decrease in mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) as well as the increase of NPY expression in the amygdala of rats with neuropathic pain-like behaviors, NPY was closely related to the effect of amygdala nerve activity in neuropathic pain. Subsequently, mechanistic investigations indicated that NPY2R activated the MAPK signaling pathway in the amygdala. NPY2R-induced decrease of MWT and TWL were also restored in the presence of MAPK signaling pathway antagonist. Moreover, it was revealed that NPY2R overexpression promoted the viability while inhibiting the apoptosis of microglia. Taken together, NPY in the amygdala interacts with NPY2R to activate the MAPK signaling pathway, thereby promoting the occurrence of neuropathic pain.
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Affiliation(s)
- Wenhui Yan
- Department of Laboratory Medicine Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, Shanghai, P.R. China.,Department of Laboratory Medicine, Tinghu People's Hospital, Yancheng, P.R. China
| | - Wuchao Liu
- Department of Neurorehabilitation, Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, Shanghai, P.R. China
| | - Junlu Wu
- Department of Laboratory Medicine, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, P.R. China
| | - Lipei Wu
- Department of Laboratory Medicine, Dongtai People's Hospital & Dongtai Hospital of Nantong University, Yancheng, P.R. China
| | - Shihai Xuan
- Department of Laboratory Medicine, Dongtai People's Hospital & Dongtai Hospital of Nantong University, Yancheng, P.R. China
| | - Weiwei Wang
- Department of Pathology, Tinghu People's Hospital, Yancheng, P.R. China
| | - Anquan Shang
- Department of Laboratory Medicine, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, P.R. China
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23
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Mesenchymal Stem Cell Derived Exosomes Suppress Neuronal Cell Ferroptosis Via lncGm36569/miR-5627-5p/FSP1 Axis in Acute Spinal Cord Injury. Stem Cell Rev Rep 2022; 18:1127-1142. [DOI: 10.1007/s12015-022-10327-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2022] [Indexed: 02/08/2023]
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24
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Kang S, Piao Y, Kang YC, Lim S, Pak YK. DA-9805 protects dopaminergic neurons from endoplasmic reticulum stress and inflammation. Biomed Pharmacother 2022; 145:112389. [PMID: 34775235 DOI: 10.1016/j.biopha.2021.112389] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/23/2021] [Accepted: 11/02/2021] [Indexed: 01/05/2023] Open
Abstract
Parkinson's disease (PD) is a multifactorial neurodegenerative disease with damages to mitochondria and endoplasmic reticulum (ER), followed by neuroinflammation. We previously reported that a triple herbal extract DA-9805 in experimental PD toxin-models had neuroprotective effects by alleviating mitochondrial damage and oxidative stress. In the present study, we investigated whether DA-9805 could suppress ER stress and neuroinflammation in vitro and/or in vivo. Pre-treatment with DA-9805 (1 μg/ml) attenuated upregulation of glucose-regulated protein 78 (GRP78), C/EBP homologous protein (CHOP) and cleaved caspase-3 in SH-SY5Y neuroblastoma cells treated with thapsigargin (1 µg/ml) or tunicamycin (2 µg/ml). In addition, DA-9805 prevented the production of IL-1β, IL-6, TNF-α and nitric oxide through inhibition of NF-κB activation in BV2 microglial cells stimulated with lipopolysaccharides (LPS). Intraperitoneal injection of LPS (10 mg/kg) into mice can induce acute neuroinflammation and dopaminergic neuronal cell death. Oral administration of DA-9805 (10 or 30 mg/kg/day for 3 days before LPS injection) prevented loss of dopaminergic neurons and activation of microglia and astrocytes in the substantia nigra in LPS-injected mouse models. Taken together, these results indicate that DA-9805 can effectively prevent ER stress and neuroinflammation, suggesting that DA-9805 is a multitargeting and disease-modifying therapeutic candidate for PD.
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Affiliation(s)
- Sora Kang
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Ying Piao
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Young Cheol Kang
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Suyeol Lim
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul, South Korea
| | - Youngmi Kim Pak
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul, South Korea; Department of Physiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea.
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25
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Cui J, Song W, Jin Y, Xu H, Fan K, Lin D, Hao Z, Lin J. Research Progress on the Mechanism of the Acupuncture Regulating Neuro-Endocrine-Immune Network System. Vet Sci 2021; 8:149. [PMID: 34437474 PMCID: PMC8402722 DOI: 10.3390/vetsci8080149] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/16/2021] [Accepted: 07/27/2021] [Indexed: 12/12/2022] Open
Abstract
As one of the conventional treatment methods, acupuncture is an indispensable component of Traditional Chinese Medicine. Currently, acupuncture has been partly accepted throughout the world, but the mechanism of acupuncture is still unclear. Since the theory of the neuro-endocrine-immune network was put forward, new insights have been brought into the understanding of the mechanism of acupuncture. Studies have proven that acupuncture is a mechanical stimulus that can activate local cell functions and neuroreceptors. It also regulates the release of related biomolecules (peptide hormones, lipid hormones, neuromodulators and neurotransmitters, and other small and large biomolecules) in the microenvironment, where they can affect each other and further activate the neuroendocrine-immune network to achieve holistic regulation. Recently, growing efforts have been made in the research on the mechanism of acupuncture. Some researchers have transitioned from studying the mechanism of acupuncture as a single linear pathway to using systems approaches, including metabolomics, genomics, proteomics and biological pathway analysis. This review summarizes the research progress on the neuro-endocrine-immune network related mechanism of acupuncture and discusses its current challenges and future directions.
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Affiliation(s)
- Jingwen Cui
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
- Center of Research and Innovation of Chinese Traditional Veterinary Medicine, Beijing 100193, China
| | - Wanrong Song
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
- Center of Research and Innovation of Chinese Traditional Veterinary Medicine, Beijing 100193, China
| | - Yipeng Jin
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
| | - Huihao Xu
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
| | - Kai Fan
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
| | - Degui Lin
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
| | - Zhihui Hao
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
- Center of Research and Innovation of Chinese Traditional Veterinary Medicine, Beijing 100193, China
| | - Jiahao Lin
- College of Veterinary Medicine, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China; (J.C.); (W.S.); (Y.J.); (H.X.); (K.F.); (D.L.)
- Center of Research and Innovation of Chinese Traditional Veterinary Medicine, Beijing 100193, China
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Needling Interventions for Sciatica: Choosing Methods Based on Neuropathic Pain Mechanisms-A Scoping Review. J Clin Med 2021; 10:jcm10102189. [PMID: 34069357 PMCID: PMC8158699 DOI: 10.3390/jcm10102189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/13/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023] Open
Abstract
Sciatica is a condition often accompanied by neuropathic pain (NP). Acupuncture and dry needling are common treatments for pain, and the current literature supports acupuncture as an effective treatment for sciatica. However, it is unknown if the mechanisms of NP are considered in the delivery of needling interventions for sciatica. Our objective was to assess the efficacy and the effectiveness of needling therapies, to identify common needling practices and to investigate if NP mechanisms are considered in the treatment of sciatica. A scoping review of the literature on needling interventions for sciatica and a review of the literature on mechanisms related to NP and needling interventions were performed. Electronic literature searches were conducted on PubMed, MEDLINE, CINAHL and Cochrane Database of Systematic Reviews from inception to August, 2020 to identify relevant papers. Reference lists of included papers were also manually screened and a related-articles search through PubMed was performed on all included articles. Mapping of the results included description of included studies, summary of results, and identification of gaps in the existing literature. Ten articles were included. All studies used acupuncture for the treatment of sciatica, no studies on dry needling were identified. Current evidence supports the efficacy and effectiveness of acupuncture for sciatica, however, no studies considered underlying NP mechanisms in the acupuncture approach for sciatica and the rationale for using acupuncture was inconsistent among trials. This review reveals that neuropathic pain mechanisms are not routinely considered in needling approaches for patients with sciatica. Studies showed acupuncture to be an effective treatment for sciatic pain, however, further research is warranted to explore if needling interventions for sciatica and NP would be more effective if NP mechanisms are considered.
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Studies of molecular pathways associated with blood neutrophil corticosteroid insensitivity in equine asthma. Vet Immunol Immunopathol 2021; 237:110265. [PMID: 33989854 DOI: 10.1016/j.vetimm.2021.110265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/02/2021] [Accepted: 05/05/2021] [Indexed: 12/25/2022]
Abstract
Severe equine asthma is characterized by airway hyperresponsiveness, neutrophilic inflammation and structural alterations of the lower airways. In asthmatic horses with neutrophilic inflammation, there is insensitivity to corticosteroids characterized by the persistence of neutrophils within the airways with therapy. We hypothesized that hypoxia or oxidative stress in the microenvironment of the lung contributes to this insensitivity of neutrophils to corticosteroids in asthmatic horses. Blood neutrophils isolated from horses with severe asthma (N = 8) and from healthy controls (N = 8) were incubated under different cell culture conditions simulating hypoxia and oxidative stress and, in the presence, or absence of dexamethasone. The pro-inflammatory gene and protein expression of neutrophils were studied. In both groups, pyocyanin-induced oxidative stress increased the mRNA expression of IL-8, IL-1β, and TNF-α. While IL-1β and TNF-α were downregulated by dexamethasone under these conditions, IL-8 was not. Simulated hypoxic conditions did not enhance pro-inflammatory gene expression in neutrophils from either group of horses. In conclusion, oxidative stress but not hypoxia may contribute to corticosteroid insensitivity via a selective gene regulation pathway. Equine neutrophil responses were similar in both heathy and asthmatic horses, indicating that it is not specific to asthmatic inflammation.
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Ge M, Tian H, Mao L, Li D, Lin J, Hu H, Huang S, Zhang C, Mei X. Zinc attenuates ferroptosis and promotes functional recovery in contusion spinal cord injury by activating Nrf2/GPX4 defense pathway. CNS Neurosci Ther 2021; 27:1023-1040. [PMID: 33951302 PMCID: PMC8339532 DOI: 10.1111/cns.13657] [Citation(s) in RCA: 109] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 12/20/2022] Open
Abstract
AIM Spinal cord injury (SCI) involves multiple pathological processes. Ferroptosis has been shown to play a critical role in the injury process. We wanted to explore whether zinc can inhibit ferroptosis, reduce inflammation, and then exert a neuroprotective effect. METHODS The Alice method was used to establish a spinal cord injury model. The Basso Mouse Scale (BMS), Nissl staining, hematoxylin-eosin staining, and immunofluorescence analysis were used to investigate the protective effect of zinc on neurons on spinal cord neurons and the recovery of motor function. The regulation of the nuclear factor E2/heme oxygenase-1 (NRF2/HO-1) pathway was assessed, the levels of essential ferroptosis proteins were measured, and the changes in mitochondria were confirmed by transmission electron microscopy and 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining. In vitro experiments using VSC4.1 (spinal cord anterior horn motor neuroma cell line), 4-hydroxynonenal (4HNE), reactive oxygen species (ROS), superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), lipid peroxides, and finally the levels of inflammatory factors were detected to assess the effect of zinc. RESULTS Zinc reversed behavioral and structural changes after SCI. Zinc increased the expression of NRF2/HO-1, thereby increasing the content of glutathione peroxidase 4 (GPX4), SOD, and GHS and reducing the levels of lipid peroxides, MDA, and ROS. Zinc also rescued injured mitochondria and effectively reduced spinal cord injury and the levels of inflammatory factors, and the NRF2 inhibitor Brusatol reversed the effects of zinc. CONCLUSION Zinc promoted the degradation of oxidative stress products and lipid peroxides through the NRF2/HO-1 and GPX4 signaling pathways to inhibit ferroptosis in neurons.
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Affiliation(s)
- Ming‐hao Ge
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - He Tian
- Department of Histology and EmbryologyJinzhou Medical UniversityJinzhouChina
| | - Liang Mao
- Department of OncologyThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Dao‐yong Li
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Jia‐quan Lin
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Heng‐shuo Hu
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Shuo‐cheng Huang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Chuan‐jie Zhang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Xi‐fan Mei
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
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Fakhri S, Abbaszadeh F, Jorjani M. On the therapeutic targets and pharmacological treatments for pain relief following spinal cord injury: A mechanistic review. Biomed Pharmacother 2021; 139:111563. [PMID: 33873146 DOI: 10.1016/j.biopha.2021.111563] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022] Open
Abstract
Spinal cord injury (SCI) is globally considered as one of the most debilitating disorders, which interferes with daily activities and life of the affected patients. Despite many developments in related recognizing and treating procedures, post-SCI neuropathic pain (NP) is still a clinical challenge for clinicians with no distinct treatments. Accordingly, a comprehensive search was conducted in PubMed, Medline, Scopus, Web of Science, and national database (SID and Irandoc). The relevant articles regarding signaling pathways, therapeutic targets and pharmacotherapy of post-SCI pain were also reviewed. Data were collected with no time limitation until November 2020. The present study provides the findings on molecular mechanisms and therapeutic targets, as well as developing the critical signaling pathways to introduce novel neuroprotective treatments of post-SCI pain. From the pathophysiological mechanistic point of view, post-SCI inflammation activates the innate immune system, in which the immune cells elicit secondary injuries. So, targeting the critical signaling pathways for pain management in the SCI population has significant importance in providing new treatments. Indeed, several receptors, ion channels, excitatory neurotransmitters, enzymes, and key signaling pathways could be used as therapeutic targets, with a pivotal role of n-methyl-D-aspartate, gamma-aminobutyric acid, and inflammatory mediators. The current review focuses on conventional therapies, as well as crucial signaling pathways and promising therapeutic targets for post-SCI pain to provide new insights into the clinical treatment of post-SCI pain. The need to develop innovative delivery systems to treat SCI is also considered.
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Affiliation(s)
- Sajad Fakhri
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Fatemeh Abbaszadeh
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Neuroscience, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Masoumeh Jorjani
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Deng WW, Wu GY, Min LX, Feng Z, Chen H, Tan ML, Sui JF, Liu HL, Hou JM. Optogenetic Neuronal Stimulation Promotes Functional Recovery After Spinal Cord Injury. Front Neurosci 2021; 15:640255. [PMID: 33897353 PMCID: PMC8062867 DOI: 10.3389/fnins.2021.640255] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/15/2021] [Indexed: 01/18/2023] Open
Abstract
Although spinal cord injury (SCI) is the main cause of disability worldwide, there is still no definite and effective treatment method for this condition. Our previous clinical trials confirmed that the increased excitability of the motor cortex was related to the functional prognosis of patients with SCI. However, it remains unclear which cell types in the motor cortex lead to the later functional recovery. Herein, we applied optogenetic technology to selectively activate glutamate neurons in the primary motor cortex and explore whether activation of glutamate neurons in the primary motor cortex can promote functional recovery after SCI in rats and the preliminary neural mechanisms involved. Our results showed that the activation of glutamate neurons in the motor cortex could significantly improve the motor function scores in rats, effectively shorten the incubation period of motor evoked potentials and increase motor potentials’ amplitude. In addition, hematoxylin-eosin staining and nerve fiber staining at the injured site showed that accurate activation of the primary motor cortex could effectively promote tissue recovery and neurofilament growth (GAP-43, NF) at the injured site of the spinal cord, while the content of some growth-related proteins (BDNF, NGF) at the injured site increased. These results suggested that selective activation of glutamate neurons in the primary motor cortex can promote functional recovery after SCI and may be of great significance for understanding the neural cell mechanism underlying functional recovery induced by motor cortex stimulation.
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Affiliation(s)
- Wei-Wei Deng
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Guang-Yan Wu
- Experimental Center of Basic Medicine, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Ling-Xia Min
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Zhou Feng
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Hui Chen
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Ming-Liang Tan
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Jian-Feng Sui
- Experimental Center of Basic Medicine, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Hong-Liang Liu
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
| | - Jing-Ming Hou
- Department of Rehabilitation, Southwest Hospital, Army Medical University, Chongqing, China
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Inhibition of ERK1/2 phosphorylation attenuates spinal cord injury induced astrocyte activation and inflammation through negatively regulating aquaporin-4 in rats. Brain Res Bull 2021; 170:162-173. [PMID: 33592275 DOI: 10.1016/j.brainresbull.2021.02.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 01/31/2021] [Accepted: 02/08/2021] [Indexed: 01/09/2023]
Abstract
The extracellular signal-regulated kinase (ERK) pathway has been reported to play a pivotal role in mediating spinal cord injury (SCI) progression. The present study aimed to investigate the effects of phosphorylated ERK1/2 (p-ERK1/2) inhibition on SCI-induced astrocyte activation and inflammation and its possible mechanism in rats. Here, female Sprague-Dawley rats were randomly assigned to four groups: (1) Sham group, (2) SCI group, (3) TGN-020 group (aquaporin-4, AQP4, blocking agent), (4) PD98059 group (ERK blocking agent). A well SCI model was established by compressing the thoracic vertebra 10 level (weight 35 g, time 5 min) in rats. Western blotting and immunofluorescence staining were used to measure the expression of associated proteins after SCI. HE staining and Nissl staining were performed to detect the morphological changes of spinal cords and the number of surviving neurons following SCI, respectively. The Basso-Beattie-Bresnahan open-field rating scale was used to evaluate functional locomotor recovery following SCI in rats. Our results demonstrated that SCI significantly induced the upregulation of aquaporin-4, p-ERK1/2, glial fibrillary acidic protein, proliferating cell nuclear antigen, and proinflammatory cytokines (tumor necrosis factor-α, interleukin-6 and interleukin-1β). However, treatment with TGN-020 or PD98059 could effectively inhibit astrocyte proliferation and proinflammatory cytokine release, preserve the number of surviving ventral horn neurons, and subsequently improve the locomotor function of rats after SCI. Interestingly, the SCI-induced elevation of AQP4 expression was downregulated by p-ERK1/2 inhibition, suggesting that blocking ERK1/2 phosphorylation could attenuate astrocyte activation and inflammatory processes through negative regulation of AQP4. Therefore, p-ERK1/2 blockade may be employed as a therapeutic target for SCI.
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Lyu Z, Guo Y, Gong Y, Fan W, Dou B, Li N, Wang S, Xu Y, Liu Y, Chen B, Guo Y, Xu Z, Lin X. The Role of Neuroglial Crosstalk and Synaptic Plasticity-Mediated Central Sensitization in Acupuncture Analgesia. Neural Plast 2021; 2021:8881557. [PMID: 33531894 PMCID: PMC7834789 DOI: 10.1155/2021/8881557] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 12/30/2020] [Accepted: 01/07/2021] [Indexed: 02/07/2023] Open
Abstract
Although pain is regarded as a global public health priority, analgesic therapy remains a significant challenge. Pain is a hypersensitivity state caused by peripheral and central sensitization, with the latter considered the culprit for chronic pain. This study summarizes the pathogenesis of central sensitization from the perspective of neuroglial crosstalk and synaptic plasticity and underlines the related analgesic mechanisms of acupuncture. Central sensitization is modulated by the neurotransmitters and neuropeptides involved in the ascending excitatory pathway and the descending pain modulatory system. Acupuncture analgesia is associated with downregulating glutamate in the ascending excitatory pathway and upregulating opioids, 𝛾-aminobutyric acid, norepinephrine, and 5-hydroxytryptamine in the descending pain modulatory system. Furthermore, it is increasingly appreciated that neurotransmitters, cytokines, and chemokines are implicated in neuroglial crosstalk and associated plasticity, thus contributing to central sensitization. Acupuncture produces its analgesic action by inhibiting cytokines, such as interleukin-1β, interleukin-6, and tumor necrosis factor-α, and upregulating interleukin-10, as well as modulating chemokines and their receptors such as CX3CL1/CX3CR1, CXCL12/CXCR4, CCL2/CCR2, and CXCL1/CXCR2. These factors are regulated by acupuncture through the activation of multiple signaling pathways, including mitogen-activated protein kinase signaling (e.g., the p38, extracellular signal-regulated kinases, and c-Jun-N-terminal kinase pathways), which contribute to the activation of nociceptive neurons. However, the responses of chemokines to acupuncture vary among the types of pain models, acupuncture methods, and stimulation parameters. Thus, the exact mechanisms require future clarification. Taken together, inhibition of central sensitization modulated by neuroglial plasticity is central in acupuncture analgesia, providing a novel insight for the clinical application of acupuncture analgesia.
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Affiliation(s)
- Zhongxi Lyu
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Yongming Guo
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Yinan Gong
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Wen Fan
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- Suzuka University of Medical Science, Suzuka 5100293, Japan
| | - Baomin Dou
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Ningcen Li
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Shenjun Wang
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Yuan Xu
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Yangyang Liu
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Bo Chen
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Yi Guo
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
- School of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhifang Xu
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- School of Acupuncture & Moxibustion and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Xiaowei Lin
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
- School of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
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Quan M, Hwang WH, Kim JH, Kim YY. Analysis of pain markers and epidural fibrosis caused by repeated spinal surgery in Sprague-Dawley rats. BMC Musculoskelet Disord 2021; 22:16. [PMID: 33402133 PMCID: PMC7786924 DOI: 10.1186/s12891-020-03920-z] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/26/2020] [Indexed: 11/18/2022] Open
Abstract
Background Epidural fibrosis is one of the aetiologies of pain following a spinal revision surgery. It is reported that the specific members of the mitogen – activated protein kinases (MAPK) family might mediate neuropathic pain. However, roles of epidural fibrosis caused by repeated spinal surgeries and pain-related proteins in causing the post spinal surgery syndrome remain unknown. Using a rat spinal surgery epidural fibrosis and adhesion model, in this study, we evaluated and investigated the relationship between pain markers and epidural fibrosis. Methods Sprague–Dawley rats that underwent the spinal surgery were divided into three groups: group A (single laminectomy), group B (two repeated surgeries) and group C (three repeated surgeries). Dural thickness was measured in each experimental group, and immunohistochemical analysis and western blotting of mitogen-activated protein kinases were performed (ERK, p38 and JNK) using the spine cord. Results Dural thickness was 6.363 ± 1.911 μm in group A, 13.238 ± 2.123 μm in group B and 19.4 ± 2.115 μm in group C, respectively. In the western blotting, phosphorylated ERK expression gradually increased with the number of repeated surgeries, and expression in groups B (1.77-fold) and C (2.42-fold) increased as compared to expression in group A. Phosphorylated p38 showed an increasing trend with the number of repeated surgeries, and groups B (1.17-fold) and C (1.33-fold) expression increased compared with group A. However, phosphorylated JNK expression did not gradually increase with the number of repeated surgeries, and groups B (1.62-fold) and C (1.43-fold) expression increased compared with group A. Excluding phosphorylated JNK, immunohistochemical analysis revealed that phosphorylated ERK and p38 expression gradually increased with the number of repeated surgeries in the spine dorsal horn, as evidenced by western blotting. Conclusions Repeated spinal surgeries may increase dural thickness and expression of phosphorylated ERK and p38 in the spinal dorsal horn, and it suggests that the neuropathic pain is likely induced by epidural fibrosis and that the pain increases with the number of repeated surgeries. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-020-03920-z.
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Affiliation(s)
- Meiling Quan
- Department of Pathophysiology, School of Basic Medical Sciences, Beihua University, Jilin, 132021, China.,Department of Orthopedics, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 64, Daeheung-ro, Jung-gu, Daejeon, 34943, Republic of Korea
| | - Won-Ha Hwang
- Department of Orthopedics, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 64, Daeheung-ro, Jung-gu, Daejeon, 34943, Republic of Korea
| | - Jae-Hoon Kim
- Department of Orthopedics, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 64, Daeheung-ro, Jung-gu, Daejeon, 34943, Republic of Korea
| | - Young-Yul Kim
- Department of Orthopedics, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 64, Daeheung-ro, Jung-gu, Daejeon, 34943, Republic of Korea.
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Cao BQ, Tan F, Zhan J, Lai PH. Mechanism underlying treatment of ischemic stroke using acupuncture: transmission and regulation. Neural Regen Res 2021; 16:944-954. [PMID: 33229734 PMCID: PMC8178780 DOI: 10.4103/1673-5374.297061] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The inflammatory response after cerebral ischemia/reperfusion is an important cause of neurological damage and repair. After cerebral ischemia/reperfusion, microglia are activated, and a large number of circulating inflammatory cells infiltrate the affected area. This leads to the secretion of inflammatory mediators and an inflammatory cascade that eventually causes secondary brain damage, including neuron necrosis, blood-brain barrier destruction, cerebral edema, and an oxidative stress response. Activation of inflammatory signaling pathways plays a key role in the pathological process of ischemic stroke. Increasing evidence suggests that acupuncture can reduce the inflammatory response after cerebral ischemia/reperfusion and promote repair of the injured nervous system. Acupuncture can not only inhibit the activation and infiltration of inflammatory cells, but can also regulate the expression of inflammation-related cytokines, balance the effects of pro-inflammatory and anti-inflammatory factors, and interfere with inflammatory signaling pathways. Therefore, it is important to study the transmission and regulatory mechanism of inflammatory signaling pathways after acupuncture treatment for cerebral ischemia/reperfusion injury to provide a theoretical basis for clinical treatment of this type of injury using acupuncture. Our review summarizes the overall conditions of inflammatory cells, mediators, and pathways after cerebral ischemia/reperfusion, and discusses the possible synergistic intervention of acupuncture in the inflammatory signaling pathway network to provide a foundation to explore the multiple molecular mechanisms by which acupuncture promotes nerve function restoration.
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Affiliation(s)
- Bing-Qian Cao
- Department of Neurology, Foshan Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Foshan, Guangdong Province, China
| | - Feng Tan
- Department of Neurology, Foshan Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Foshan, Guangdong Province, China
| | - Jie Zhan
- Department of Rehabilitation, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong Province, China
| | - Peng-Hui Lai
- Department of Rehabilitation, Nan'ao People's Hospital Dapeng New District, Shenzhen, Guangdong Province, China
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Lee JY, Choi HY, Park CS, Kim DH, Yune TY. Total saponin extract, ginsenoside Rb1, and compound K alleviate peripheral and central neuropathic pain through estrogen receptors on rats. Phytother Res 2020; 35:2119-2132. [PMID: 33205558 DOI: 10.1002/ptr.6960] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/25/2020] [Accepted: 09/19/2020] [Indexed: 01/02/2023]
Abstract
In this study, we investigated whether total saponin extract (TSE), ginsenoside Rb1, and Rb1 metabolite compound K, which are isolated from red ginseng, have antinociceptive effects on peripheral and central neuropathic pain (PNP and CNP, respectively). PNP and CNP were induced by tail nerve injury (TNI) at S1 and by contusive spinal cord injury (SCI) at T9 in male Sprague-Dawley rats, respectively. Two weeks after TNI or 4 weeks after SCI, pain-induced rats were orally administered vehicle, TSE (50 mg/kg), Rb1 (12.5 mg/kg), compound K (7 mg/kg), or gabapentin (GBP, 60 mg/kg), and the antinociceptive effects were examined by von Frey filament, cold/warm water, and hot plate analyses. Allodynia and hyperalgesia were significantly alleviated by TSE, Rb1, and GBP 1 hr after drug administration. The immunohistochemistry and real-time RT-PCR results showed that the activation of microglia/astrocytes and the expression of inflammatory mediators such as Il-1β, Il-6, iNOS, and Cox-2 were also significantly inhibited in L4-L5 spinal cord of CNP-induced rats 1 hr after drug administration. Furthermore, the antinociceptive effects of TSE and Rb1 were reversed by treatment with the estrogen receptor (ER) antagonist ICI182780. In particular, compound K also significantly alleviated both PNP and CNP. Therefore, our results indicate that TSE, Rb1, and compound K have potential antinociceptive effects against neuropathic pain that might be mediated through the ER.
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Affiliation(s)
- Jee Youn Lee
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Seoul, South Korea
| | - Hae Young Choi
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Seoul, South Korea
| | - Chan Sol Park
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Seoul, South Korea
| | - Dong Hyun Kim
- Department of Life and Nanopharmaceutical Sciences and Department of Pharmacy, Kyung Hee University, Seoul, South Korea
| | - Tae Young Yune
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Seoul, South Korea.,Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, South Korea
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Efficacy and Safety of Acupuncture Therapy for Patients with Acute Ankle Sprain: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:9109531. [PMID: 33123213 PMCID: PMC7585670 DOI: 10.1155/2020/9109531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 09/14/2020] [Accepted: 09/26/2020] [Indexed: 12/26/2022]
Abstract
Background The efficacy of acupuncture for acute ankle sprain (AAS) is controversial. This study aimed to critically assess the efficacy and safety of acupuncture for AAS. Methods Parallel-group randomized controlled trials (RCTs) were included regardless of language or publication date. Participants with AAS were included regardless of age, sex, race, nationality, or diagnostic criteria for AAS. Experimental interventions included acupuncture alone or in combination with traditional therapies. Control interventions included no treatment, placebo, or traditional therapies. The primary outcome was the Kofoed ankle score. The secondary outcomes included visual analogue scale, duration of pain, use of painkiller, ankle circumference, effective rate, cure rate, and adverse events. PubMed, Embase, Cochrane Library, Web of Science, China National Knowledge Infrastructure, Wanfang Digital Periodicals, and Chinese Science and Technology Periodicals database were searched to identify potentially eligible studies from inception to September 10, 2020. World Health Organization International Clinical Trials Registry Platform (WHO ICTRP), ClinicalTrials.gov, Chinese Clinical Trial Registry (ChiCTR), and the reference list of eligible RCTs were checked to identify ongoing or unpublished studies. Risk of bias was assessed by the Cochrane Collaboration's tool. Statistical analyses were performed by RevMan 5.3 software. P < 0.05 indicated statistical significance. Results Seventeen eligible studies were included for the statistical analysis. There was no statistically significant difference of Kofoed ankle score between acupuncture and Rest, Ice, Compression, and Elevation (RICE) group (P=0.75). However, acupuncture could significantly relieve pain (P=0.02) and increase cure rate (P=0.004) compared with RICE. Moreover, acupuncture plus RICE could also significantly relieve pain (P < 0.00001) and increase cure rate (P=0.01) compared with RICE alone. Acupuncture combined with massage could significantly relieve pain (P=0.04) compared with massage alone. Acupuncture plus Chinese medicine might be more effective for relieving pain (P < 0.00001), reducing the duration of pain (P < 0.00001), and increasing cure rate (P=0.0002) compared with Chinese medicine alone. Two studies reported no adverse reactions. One study reported that a participant suffered from mild drug-related allergic reaction and was healed without treatment. Conclusions The findings of the present study suggest that acupuncture may be beneficial for AAS. However, more large-scale and well-designed RCTs are warranted.
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Hong X, Jiang F, Li Y, Fang L, Qian Z, Chen H, Kong R. Treatment with 5-methoxytryptophan attenuates microglia-induced neuroinflammation in spinal cord trauma. Int Immunopharmacol 2020; 88:106988. [PMID: 33182019 DOI: 10.1016/j.intimp.2020.106988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 08/21/2020] [Accepted: 09/07/2020] [Indexed: 12/17/2022]
Abstract
Neuroinflammation following spinal cord injury (SCI) leads to extensive secondary damage in neural tissue adjacent to the primary lesion foci. 5-Methoxytryptophan (5MTP) is a metabolite of tryptophan and proven to play a protective role in several inflammation-related diseases. However, the specific efficacy and molecular mechanism of 5MTP in SCI remains unknown. Here, we aimed to investigate the anti-inflammatory role of 5MTP in microglia-induced neuroinflammation and its therapeutic effect in SCI. To assess the effect of 5MTP in neuroinflammation, we used lipopolysaccharide (LPS) to stimulate microglia in vitro and detected the microglial phenotype using immunofluorescence staining, the inflammatory-related pathway using western blotting, and pro-inflammatory cytokines using ELISA and immunofluorescence. To explore the therapeutic effect of 5MTP in SCI, we performed contusion of the spinal cord in mice and measured the levels of neuroinflammation, glial accumulation, histological and functional recovery using ELISA, immunofluorescence staining, immunohistochemical staining, hematoxylin-eosin staining, Nissl staining and the Basso Mouse Scale, respectively. We found that treatment with 5MTP contributed to decreased activation of pro-inflammatory microglia and reduced the generation of inflammatory cytokines, including TNF-α, IL-1β, IL-6 and IL-18, by negative regulation of the p38-MAPK signaling pathway and NLRP3/caspase-1 expression. In vivo, administration of 5MTP showed mitigatory neuroinflammation levels associated with alleviated glial scar in SCI mice; hence, the neurological integrity and the neuronal survival, as well as locomotor function, were improved following 5MTP administration. 5MTP, as a novel anti-neuroinflammatory reagent, can attenuate activated microglia-induced secondary injury following SCI, and therefore, shows promise as a potential compound for application in a clinical trial for SCI therapy.
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Affiliation(s)
- Xin Hong
- Department of Orthopedics, Zhongda Hospital of Southeast University, Nanjing, China
| | - Fan Jiang
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - You Li
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Le Fang
- Department of Critical Care Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zhanyang Qian
- Department of Orthopedics, Zhongda Hospital of Southeast University, Nanjing, China.
| | - Hongtao Chen
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Renyi Kong
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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Yu Z. Neuromechanism of acupuncture regulating gastrointestinal motility. World J Gastroenterol 2020; 26:3182-3200. [PMID: 32684734 PMCID: PMC7336328 DOI: 10.3748/wjg.v26.i23.3182] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 03/29/2020] [Accepted: 05/23/2020] [Indexed: 02/06/2023] Open
Abstract
Acupuncture has been used in China for thousands of years and has become more widely accepted by doctors and patients around the world. A large number of clinical studies and animal experiments have confirmed that acupuncture has a benign adjustment effect on gastrointestinal (GI) movement; however, the mechanism of this effect is unclear, especially in terms of neural mechanisms, and there are still many areas that require further exploration. This article reviews the recent data on the neural mechanism of acupuncture on GI movements. We summarize the neural mechanism of acupuncture on GI movement from four aspects: acupuncture signal transmission, the sympathetic and parasympathetic nervous system, the enteric nervous system, and the central nervous system.
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Affiliation(s)
- Zhi Yu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
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Cheng M, Wu X, Wang F, Tan B, Hu J. Electro-Acupuncture Inhibits p66Shc-Mediated Oxidative Stress to Facilitate Functional Recovery After Spinal Cord Injury. J Mol Neurosci 2020; 70:2031-2040. [PMID: 32488847 DOI: 10.1007/s12031-020-01609-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/19/2020] [Indexed: 01/30/2023]
Abstract
Oxidative stress is the core problem in improving secondary spinal cord injury (SCI). To investigate the effect of electro-acupuncture with different frequencies on neuroinflammation, oxidative stress injury, as well as related signaling pathways, male Sprague-Dawley (SD) rats were induced using operation for model SCI and then treated with electrical stimulation at low frequency (2 mA, 0.2 Hz), medium frequency (2 mA, 50 Hz), and high frequency (2 mA, 100 Hz), respectively. Here, we first demonstrated that the JNK/p66Shc signal pathway promoted ROS generation and inhibited the anti-oxidation effect of FoxO3a to induce oxidative stress damage after SCI and the mechanism of electro-acupuncture in anti-oxidative stress. Electro-acupuncture facilitated functional recovery after SCI and improved the apoptosis of neurons. Furthermore, p38MAPK-mediated microglia activation and inflammatory reaction and JNK/p66Shc-mediated ROS generation and oxidative stress damage were both attenuated by electro-acupuncture. However, the inhibitory effect of electro-acupuncture on p38MAPK was enslaved to the acupuncture frequency, but the ROS generation and phosphorylation of p66Shc were effectively inhibited by electro-acupuncture. Therefore, the activation of JNK/p66Shc promoted the ROS-induced oxidative stress damage after SCI, and inhibiting the phosphorylation of p66Shc-mediated oxidative stress was the key target of electro-acupuncture to facilitate functional recovery SCI, but not p38MAPK.
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Affiliation(s)
- Ming Cheng
- Department of Orthopedics, Sichuan Academy of Medical Sciences and Sichuan People's Hospital, Chengdu, 610072, China
- Department of Orthopedics, JinNiu District People's Hospital of Chengdu, Chengdu, 610036, China
| | - Xiaojing Wu
- Department of Orthopedics, Sichuan Academy of Medical Sciences and Sichuan People's Hospital, Chengdu, 610072, China
| | - Fei Wang
- Department of Orthopedics, Sichuan Academy of Medical Sciences and Sichuan People's Hospital, Chengdu, 610072, China
| | - Bo Tan
- Department of Orthopedics, Sichuan Academy of Medical Sciences and Sichuan People's Hospital, Chengdu, 610072, China
| | - Jiang Hu
- Department of Orthopedics, Sichuan Academy of Medical Sciences and Sichuan People's Hospital, Chengdu, 610072, China.
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The poly-ADP ribose polymerase-1/apoptosis-inducing factor pathway may help mediate the protective effect of electroacupuncture on early brain injury after subarachnoid hemorrhage. Neuroreport 2020; 31:605-612. [PMID: 32301816 DOI: 10.1097/wnr.0000000000001445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Subarachnoid hemorrhage (SAH) is a clinically common, acute, critical cerebrovascular disease associated with high mortality. Here, we investigated the effects of electroacupuncture on early brain injury after SAH. We successfully established a Sprague-Dawley rat model of the SAH model, and randomly divided the rats into four groups: sham-operated group, SAH group, positive control group, and electroacupuncture group. Electroacupuncture effectively decreased the number of transferase UTP nick end labeling-positive cells and extent of DNA fragmentation compared with the control, indicating a decrease in apoptosis. Moreover, electroacupuncture decreased the expression of proteins involved in the poly-ADP ribose polymerase-1/apoptosis-inducing factor (PARP-1/AIF) pathway in vivo, and the difference was statistically significant (P < 0.05). Treatment with electroacupuncture resulted in a significant improvement in neurological function. It inhibited the increase in blood-brain barrier permeability by regulating the protein expression of matrix metalloproteinase-9, occludin, and claudin-5. Additionally, electroacupuncture limited the development of cerebral edema and microglial activation in early brain injury after SAH. In conclusion, electroacupuncture can ameliorate early brain injury after SAH, and this may occur via inhibition of the PARP-1/AIF pathway.
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Chen T, Zhang WW, Chu YX, Wang YQ. Acupuncture for Pain Management: Molecular Mechanisms of Action. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2020; 48:793-811. [DOI: 10.1142/s0192415x20500408] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Acupuncture reduces pain by activating specific areas called acupoints on the patient’s body. When these acupoints are fully activated, sensations of soreness, numbness, fullness, or heaviness called De qi or Te qi are felt by clinicians and patients. There are two kinds of acupuncture, manual acupuncture and electroacupuncture (EA). Compared with non-acupoints, acupoints are easily activated on the basis of their special composition of blood vessels, mast cells, and nerve fibers that mediate the acupuncture signals. In the spinal cord, EA can inhibit glial cell activation by down-regulating the chemokine CX3CL1 and increasing the anti-inflammatory cytokine interleukin-10. This inhibits P38 mitogen-activated protein kinase and extracellular signal-regulated kinase pathways, which are associated with microglial activation of the C-Jun N-terminal kinase signaling pathway and subsequent astrocyte activation. The inactivation of spinal microglia and astrocytes mediates the immediate and long-term analgesic effects of EA, respectively. A variety of pain-related substances released by glial cells such as the proinflammatory cytokines tumor necrosis factor [Formula: see text], interleukin-1[Formula: see text], interleukin-6, and prostaglandins such as prostaglandins E2 can also be reduced. The descending pain modulation system in the brain, including the anterior cingulated cortex, the periaqueductal gray, and the rostral ventromedial medulla, plays an important role in EA analgesia. Multiple transmitters and modulators, including endogenous opioids, cholecystokinin octapeptide, 5-hydroxytryptamine, glutamate, noradrenalin, dopamine, [Formula: see text]-aminobutyric acid, acetylcholine, and orexin A, are involved in acupuncture analgesia. Finally, the “Acupuncture [Formula: see text]” strategy is introduced to help clinicians achieve better analgesic effects, and a newly reported acupuncture method called acupoint catgut embedding, which injects sutures made of absorbable materials at acupoints to achieve long-term effects, is discussed.
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Affiliation(s)
- Teng Chen
- Department of Integrative Medicine and Neurobiology, Institutes of Integrative Medicine School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University Shanghai, P. R. China
| | - Wen Wen Zhang
- Department of Integrative Medicine and Neurobiology, Institutes of Integrative Medicine School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University Shanghai, P. R. China
| | - Yu-Xia Chu
- Department of Integrative Medicine and Neurobiology, Institutes of Integrative Medicine School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University Shanghai, P. R. China
| | - Yan-Qing Wang
- Department of Integrative Medicine and Neurobiology, Institutes of Integrative Medicine School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University Shanghai, P. R. China
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The Anti-Inflammatory and Antioxidant Effects of Sodium Propionate. Int J Mol Sci 2020; 21:ijms21083026. [PMID: 32344758 PMCID: PMC7215993 DOI: 10.3390/ijms21083026] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 01/06/2023] Open
Abstract
The major end-products of dietary fiber fermentation by gut microbiota are the short-chain fatty acids (SCFAs) acetate, propionate, and butyrate, which have been shown to modulate host metabolism via effects on metabolic pathways at different tissue sites. Several studies showed the inhibitory effects of sodium propionate (SP) on nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway. We carried out an in vitro model of inflammation on the J774-A1 cell line, by stimulation with lipopolysaccharide (LPS) and H2O2, followed by the pre-treatment with SP at 0.1, 1 mM and 10 mM. To evaluate the effect on acute inflammation and superoxide anion-induced pain, we performed a model of carrageenan (CAR)-induced rat paw inflammation and intraplantar injection of KO2 where rats received SP orally (10, 30, and 100 mg/kg). SP decreased in concentration-dependent-manner the expression of cicloxigenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) following LPS stimulation. SP was able to enhance anti-oxidant enzyme production such as manganese superoxide dismutase (MnSOD) and heme oxygenase-1 (HO-1) following H2O2 stimulation. In in vivo models, SP (30 and 100 mg/kg) reduced paw inflammation and tissue damage after CAR and KO2 injection. Our results demonstrated the anti-inflammatory and anti-oxidant properties of SP; therefore, we propose that SP may be an effective strategy for the treatment of inflammatory diseases.
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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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Basu P, Basu A. In Vitro and In Vivo Effects of Flavonoids on Peripheral Neuropathic Pain. Molecules 2020; 25:molecules25051171. [PMID: 32150953 PMCID: PMC7179245 DOI: 10.3390/molecules25051171] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/02/2020] [Indexed: 01/04/2023] Open
Abstract
Neuropathic pain is a common symptom and is associated with an impaired quality of life. It is caused by the lesion or disease of the somatosensory system. Neuropathic pain syndromes can be subdivided into two categories: central and peripheral neuropathic pain. The present review highlights the peripheral neuropathic models, including spared nerve injury, spinal nerve ligation, partial sciatic nerve injury, diabetes-induced neuropathy, chemotherapy-induced neuropathy, chronic constriction injury, and related conditions. The drugs which are currently used to attenuate peripheral neuropathy, such as antidepressants, anticonvulsants, baclofen, and clonidine, are associated with adverse side effects. These negative side effects necessitate the investigation of alternative therapeutics for treating neuropathic pain conditions. Flavonoids have been reported to alleviate neuropathic pain in murine models. The present review elucidates that several flavonoids attenuate different peripheral neuropathic pain conditions at behavioral, electrophysiological, biochemical and molecular biological levels in different murine models. Therefore, the flavonoids hold future promise and can be effectively used in treating or mitigating peripheral neuropathic conditions. Thus, future studies should focus on the structure-activity relationships among different categories of flavonoids and develop therapeutic products that enhance their antineuropathic effects.
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Affiliation(s)
- Paramita Basu
- Department of Anesthesiology, Pittsburgh Center for Pain Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA;
| | - Arpita Basu
- Department of Kinesiology and Nutrition Sciences, School of Integrated Health Sciences, University of Nevada, Las Vegas, NV 89154, USA
- Correspondence: ; Tel.: +702-895-4576; Fax: +702-895-1500
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Electroacupuncture Inhibits the Activity of Astrocytes in Spinal Cord in Rats with Visceral Hypersensitivity by Inhibiting P2Y 1 Receptor-Mediated MAPK/ERK Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:4956179. [PMID: 32184891 PMCID: PMC7061128 DOI: 10.1155/2020/4956179] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 11/13/2019] [Accepted: 12/27/2019] [Indexed: 02/07/2023]
Abstract
Background Irritable bowel syndrome (IBS) is a chronic functional bowel disease characterized by abdominal pain and changes in bowel habits in the absence of organic disease. Electroacupuncture (EA) has been shown to alleviate visceral hypersensitivity (VH) in IBS rat models by inhibiting the activation of astrocytes in the spinal cord. However, the underlying molecular mechanisms mediated by P2Y1 receptor of this effect of electroacupuncture remain unclear. Aim To explore whether EA inhibits the activity of astrocytes in the spinal cord dorsal horn of rat with visceral hypersensitivity by inhibiting P2Y1 receptor and its downstream mitogen activated protein kinase/extracellular regulated kinase 1 (MAPK/ERK) pathway. Methods Ten-day-old Sprague-Dawley (SD) male rats were given an intracolonic injection of 0.2 ml of 0.5% acetic acid (AA) to establish a visceral hypersensitivity model. EA was performed at Zusanli (ST 36) and Shangjuxu (ST 37) at 100 Hz for 1.05 s and 2 Hz for 2.85 s alternately, pulse width for 0.1 ms, 1 mA, 30 min/d, once a day, for 1 week. Cytokines IL-6, IL-1β, and TNF-α were analyzed by ELISA. The expressions of the P2Y1 receptor and pERK1/2 were analyzed by Western Blot and real-time PCR in the model and EA treated animals to explore the molecular mechanism of EA in inhibiting the activity of spinal cord dorsal horn (L6-S2 segment) astrocytes in rats with IBS visceral hypersensitivity. Results EA significantly reduced the behavioral abdominal withdrawal reflex score (AWRs) of IBS rats with visceral hypersensitivity induced by AA. For comparison, intrathecal injection of astrocytes activity inhibitor fluorocitrate (FCA) also reduced visceral hypersensitivity in IBS rats. EA at Zusanli and Shangjuxu inhibited the mRNA and protein expression of the glial fibrillary acidic protein (GFAP) and in rat spinal cord and reduced the release of inflammatory cytokines IL-6, IL-1, and TNF-α were analyzed by ELISA. The expressions of the P2Y1 receptor and pERK1/2 were analyzed by Western Blot and real-time PCR in the model and EA treated animals to explore the molecular mechanism of EA in inhibiting the activity of spinal cord dorsal horn (L6-S2 segment) astrocytes in rats with IBS visceral hypersensitivity. β, and TNF-μg, 10 μg, 10 Conclusion EA inhibited astrocyte activity in the spinal cord dorsal horn of rat with IBS visceral hypersensitivity by inhibiting the P2Y1 receptor and its downstream, PKC, and MAPK/ERK1/2 pathways.
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Han N, Yang L, Zhang X, Zhou Y, Chen R, Yu Y, Dong Z, Zhang M. LncRNA MATN1-AS1 prevents glioblastoma cell from proliferation and invasion via RELA regulation and MAPK signaling pathway. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:784. [PMID: 32042800 DOI: 10.21037/atm.2019.11.36] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background Glioblastoma (GBM) is one of the most aggressive and malignant tumor types. Despite treatment advances, GBM pathogenesis still remains largely unknown. MATN1-AS1, an intron-retained long non-coding RNA (lncRNA), has been implicated in GBM development. However, the underlying mechanism has not been identified. This study aimed to examine MATN1-AS1 expression and uncover its role in GBM. Methods LncRNAs with low expression levels were selected by analyzing brain glioma-related genes. The relative mRNA level of MATN1-AS1 was quantified using RT-qPCR in 75 GBM tumors and 10 normal brain tissues. Overall survival was assessed using the Kaplan-Meier method. RT-qPCR and immunoblotting analysis were carried out to assess the levels of MATN1-AS1, RELA, ERK1/2, Bcl-2, Bax, survivin, and MMP-9 in GBM cells. Biological functions of MATN1-AS1 in GBM tumors were measured both in vivo and in vitro. The mechanism of RELA regulation by MATN1-AS1 was detected using RNA pull-down, RNA-binding protein immunoprecipitation, chromatin immunoprecipitation, and the dual luciferase reporter gene assay. Results MATN1-AS1 was the most downregulated lncRNA in GBM and was correlated with a shorter survival time and poorer prognosis of GBM patients. Conversely, RELA was increased in GBM tumor tissues and negatively correlated with MATN1-AS1 expression. MATN1-AS1 over-expression or siRNA-RELA knockdown resulted in downregulation of mRNA and protein levels of RELA, ERK1/2, Bcl-2, survivin, and MMP-9; reduced cell proliferation and invasion; increased Bax mRNA and protein levels; and enhanced cellular apoptosis. MATN1-AS1 bound to E2F6, which negatively targeted RELA. Furthermore, MATN1-AS1 over-expression in GBM cells resulted in significant inhibition of tumor growth in vivo. Conclusions Upregulation of the lncRNA MATN1-AS1 inhibited GBM cell proliferation and invasion through inhibition of RELA via E2F6 and suppression of the MAPK signaling pathway. MATN1-AS1 might be an underlying therapeutic target for GBM.
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Affiliation(s)
- Na Han
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Li Yang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiaoxi Zhang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yangmei Zhou
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Rui Chen
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yang Yu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhen Dong
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Mengxian Zhang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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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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Effect of mito-TEMPO, a mitochondria-targeted antioxidant, in rats with neuropathic pain. Neuroreport 2019; 29:1275-1281. [PMID: 30052549 DOI: 10.1097/wnr.0000000000001105] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The therapeutic effects of mitochondria-targeted antioxidants have been demonstrated in many pathological conditions, but their effect on neuropathic pain remains unclear. The objective was to study the therapeutic effects and mechanisms of mito-TEMPO (MT), as a nitroxide conjugated with a triphenylphosphonium moiety, on neuropathic pain in rats. Rats were randomly assigned to sham control (sham), chronic constrictive injury (CCI) or MT treatment groups (sham+MT and CCI+MT). All animals received CCI of the left sciatic nerve except those in the sham group. Overall, 0.7 mg/kg of MT was intraperitoneally injected once daily for 14 consecutive days starting from day 7 after surgery. Mechanical paw withdrawal threshold and thermal paw withdrawal latency were detected to assess pain behavior. Malondialdehyde and reduced glutathione content and total superoxide dismutase activity of serum and spinal cord tissues were estimated to assess oxidative stress levels. Mitochondrial morphology and dynamin-related proteins were used to evaluate mitochondrial function, such as fusion [Mitofusin (Mfn) and optic atrophy 1 gene protein (OPA1)] and fission [dynamin-related protein (DRP1) and Fis1]. Paw withdrawal threshold and thermal paw withdrawal latency were significantly increased in the CCI+MT group compared with the CCI group. The malondialdehyde content was decreased whereas glutathione content and superoxide dismutase activity were increased in the serum of CCI+MT rats. Furthermore, MT substantially attenuated the elevated number and decreased size of mitochondria induced by CCI. Finally, MT significantly increased expressions of Mfn1 and OPA1 and significantly decreased expression of DRP1 and Fis1. The mitochondria-targeted antioxidant MT relieved neuropathic pain induced by CCI by protecting mitochondria against oxidative stress injury.
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Alvarado-Sanchez BG, Salgado-Ceballos H, Torres-Castillo S, Rodriguez-Silverio J, Lopez-Hernandez ME, Quiroz-Gonzalez S, Sanchez-Torres S, Mondragón-Lozano R, Fabela-Sanchez O. Electroacupuncture and Curcumin Promote Oxidative Balance and Motor Function Recovery in Rats Following Traumatic Spinal Cord Injury. Neurochem Res 2019; 44:498-506. [PMID: 30603981 DOI: 10.1007/s11064-018-02704-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 11/23/2018] [Accepted: 12/18/2018] [Indexed: 12/31/2022]
Abstract
Spinal cord injury (SCI) is a condition that puts the patient's life at risk in the acute phase and, during the chronic stage, results in permanent deficits in motor, sensory and autonomic functions. Isolated therapeutic strategies have not shown an effect on this condition. Therefore, this study aimed to evaluate the effects of electroacupuncture (EA) and curcumin, alone or combined, on the oxidative balance, motor function recovery and amount of preserved tissue following a traumatic SCI. Long-Evans rats were divided into five groups: SHAM, SCI, SCI + EA, SCI + Curcumin, and SCI + EA + Curcumin. Nitric oxide was significantly decreased in the Curcumin group; the EA, Curcumin and SCI + EA + Curcumin groups had significantly decreased hydroxyl radical and lipid peroxidation levels. Motor function recovery and the amount of preserved spinal cord tissue were significantly greater in the EA, Curcumin and EA + Curcumin groups. The results show that EA and Curcumin treatment alone or in combination decreased oxidative stress, improved functional motor recovery and increased the amount of preserved spinal cord tissue following a traumatic injury.
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Affiliation(s)
| | - Hermelinda Salgado-Ceballos
- Unidad de Investigación Médica en Enfermedades Neurológicas, Centro Médico Nacional Siglo XXI, IMSS, C.P. 06720, México City, Mexico
- Proyecto Camina A. C., C.P. 14050, México City, Mexico
| | - Sergio Torres-Castillo
- Universidad Estatal del Valle de Ecatepec, C.P. 55210, Ecatepec de Morelos, Estado De México, Mexico.
- Proyecto Camina A. C., C.P. 14050, México City, Mexico.
| | - Juan Rodriguez-Silverio
- Escuela Superior de Medicina, Instituto Politécnico Nacional, C.P. 11340, México City, Mexico
| | - Monica E Lopez-Hernandez
- Universidad Estatal del Valle de Ecatepec, C.P. 55210, Ecatepec de Morelos, Estado De México, Mexico
| | - Salvador Quiroz-Gonzalez
- Universidad Estatal del Valle de Ecatepec, C.P. 55210, Ecatepec de Morelos, Estado De México, Mexico
| | | | - Rodrigo Mondragón-Lozano
- Unidad de Investigación Médica en Enfermedades Neurológicas, Centro Médico Nacional Siglo XXI, IMSS, C.P. 06720, México City, Mexico
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Yao X, Zhang Y, Hao J, Duan HQ, Zhao CX, Sun C, Li B, Fan BY, Wang X, Li WX, Fu XH, Hu Y, Liu C, Kong XH, Feng SQ. Deferoxamine promotes recovery of traumatic spinal cord injury by inhibiting ferroptosis. Neural Regen Res 2019; 14:532-541. [PMID: 30539824 PMCID: PMC6334606 DOI: 10.4103/1673-5374.245480] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Ferroptosis is an iron-dependent novel cell death pathway. Deferoxamine, a ferroptosis inhibitor, has been reported to promote spinal cord injury repair. It has yet to be clarified whether ferroptosis inhibition represents the mechanism of action of Deferoxamine on spinal cord injury recovery. A rat model of Deferoxamine at thoracic 10 segment was established using a modified Allen's method. Ninety 8-week-old female Wistar rats were used. Rats in the Deferoxamine group were intraperitoneally injected with 100 mg/kg Deferoxamine 30 minutes before injury. Simultaneously, the Sham and Deferoxamine groups served as controls. Drug administration was conducted for 7 consecutive days. The results were as follows: (1) Electron microscopy revealed shrunken mitochondria in the spinal cord injury group. (2) The Basso, Beattie and Bresnahan locomotor rating score showed that recovery of the hindlimb was remarkably better in the Deferoxamine group than in the spinal cord injury group. (3) The iron concentration was lower in the Deferoxamine group than in the spinal cord injury group after injury. (4) Western blot assay revealed that, compared with the spinal cord injury group, GPX4, xCT, and glutathione expression was markedly increased in the Deferoxamine group. (5) Real-time polymerase chain reaction revealed that, compared with the Deferoxamine group, mRNA levels of ferroptosis-related genes Acyl-CoA synthetase family member 2 (ACSF2) and iron-responsive element-binding protein 2 (IREB2) were up-regulated in the Deferoxamine group. (6) Deferoxamine increased survival of neurons and inhibited gliosis. These findings confirm that Deferoxamine can repair spinal cord injury by inhibiting ferroptosis. Targeting ferroptosis is therefore a promising therapeutic approach for spinal cord injury.
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Affiliation(s)
- Xue Yao
- Department of Orthopedics, Tianjin Medical University General Hospital; State Key Laboratory of Medicinal Chemical Biology, Nankai University; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Yan Zhang
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Jian Hao
- Department of Orthopedics, Tianjin Medical University General Hospital; Department of Orthopedics, Nankai Hospital, Tianjin, China
| | - Hui-Quan Duan
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Chen-Xi Zhao
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Chao Sun
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Bo Li
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Bao-You Fan
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Xu Wang
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Wen-Xiang Li
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Xuan-Hao Fu
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin, China
| | - Yong Hu
- Department of Orthopedic and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China
| | - Chang Liu
- School of Medicine, Nankai University, Tianjin, China
| | | | - Shi-Qing Feng
- Department of Orthopedics, Tianjin Medical University General Hospital; International Science and Technology Cooperation Base of Spinal Cord Injury; Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China
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