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Wang J, Liu X, Gou J, Deng J, Li M, Zhu Y, Wu Z. Role of neuropeptides in orofacial pain: A literature review. J Oral Rehabil 2024; 51:898-908. [PMID: 38213060 DOI: 10.1111/joor.13656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 11/19/2023] [Accepted: 01/05/2024] [Indexed: 01/13/2024]
Abstract
BACKGROUND Neuropeptides play a critical role in regulating pain and inflammation. Despite accumulating evidence has further uncovered the novel functions and mechanisms of different neuropeptides in orofacial pain sensation and transmission, there is deficient systematic description of neuropeptides' pain modulation in the orofacial region, especially in the trigeminal system. OBJECTIVES The present review aims to summarise several key neuropeptides and gain a better understanding of their major regulatory roles in orofacial inflammation and pain. METHODS We review and summarise current studies related to calcitonin gene-related peptide (CGRP), substance P (SP), opioid peptide (OP), galanin (GAL) and other neuropeptides' functions and mechanisms as well as promising targets for orofacial pain control. RESULTS A number of neuropeptides are clearly expressed in the trigeminal sensory system and have critical functions in the transduction and pathogenesis of orofacial pain. The functions, possible cellular and molecular mechanisms have been introduced and discussed. Neuropeptides and their agonists or antagonists which are widely studied to be potential treatment options of orofacial pain has been evaluated. CONCLUSIONS Various neuropeptides play important but distinct (pro-nociceptive or analgesic) roles in orofacial pain with different mechanisms. In summary, CGRP, SP, NPY, NKA, HK-1, VIP mainly play proinflammatory and pro-nociceptive effects while OP, GAL, OXT, OrxA mainly have inhibitory effects on orofacial pain.
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Affiliation(s)
- Jian Wang
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Xiangtao Liu
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Junzhuo Gou
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Jing Deng
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Mujia Li
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Yafen Zhu
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Zhifang Wu
- Department of Pediatric Dentistry, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
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Lopes RV, Baggio DF, Ferraz CR, Bertozzi MM, Saraiva-Santos T, Verri Junior WA, Chichorro JG. Maresin-2 inhibits inflammatory and neuropathic trigeminal pain and reduces neuronal activation in the trigeminal ganglion. CURRENT RESEARCH IN NEUROBIOLOGY 2023; 4:100093. [PMID: 37397816 PMCID: PMC10313899 DOI: 10.1016/j.crneur.2023.100093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/23/2023] [Accepted: 05/30/2023] [Indexed: 07/04/2023] Open
Abstract
Pain is a common symptom associated with disorders involving the orofacial structures. Most acute orofacial painful conditions are easily recognized, but the pharmacological treatment may be limited by the adverse events of current available drugs and/or patients' characteristics. In addition, chronic orofacial pain conditions represent clinical challenges both, in terms of diagnostic and treatment. There is growing evidence that specialized pro-resolution lipid mediators (SPMs) present potent analgesic effects, in addition to their well characterized role in the resolution of inflammation. Maresins (MaR-1 and MaR-2) were the last described members of this family, and MaR-2 analgesic action has not yet been reported. Herein the effect of MaR-2 in different orofacial pain models was investigated. MaR-2 (1 or 10 ng) was always delivered via medullary subarachnoid injection, which corresponds to the intrathecal treatment. A single injection of MaR-2 caused a significant reduction of phases I and II of the orofacial formalin test in rats. Repeated injections of MaR-2 prevented the development of facial heat and mechanical hyperalgesia in a model of post-operative pain in rats. In a model of trigeminal neuropathic pain (CCI-ION), repeated MaR-2 injections reversed facial heat and mechanical hyperalgesia in rats and mice. CCI-ION increased c-Fos positive neurons and CGRP+ activated (nuclear pNFkB) neurons in the trigeminal ganglion (TG), which were restored to sham levels by MaR-2 repeated treatment. In conclusion, MaR-2 showed potent and long-lasting analgesic effects in inflammatory and neuropathic pain of orofacial origin and the inhibition of CGRP-positive neurons in the TG may account for MaR-2 action.
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Affiliation(s)
- Raphael Vieira Lopes
- Department of Pharmacology, Biological Sciences Sector, Federal University of Parana, Curitiba, Parana, Brazil
| | - Darciane Favero Baggio
- Department of Pharmacology, Biological Sciences Sector, Federal University of Parana, Curitiba, Parana, Brazil
| | - Camila Rodrigues Ferraz
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, PR, Brazil
| | - Mariana Marques Bertozzi
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, PR, Brazil
| | - Telma Saraiva-Santos
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, PR, Brazil
| | - Waldiceu Aparecido Verri Junior
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, PR, Brazil
| | - Juliana Geremias Chichorro
- Department of Pharmacology, Biological Sciences Sector, Federal University of Parana, Curitiba, Parana, Brazil
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Yoshikawa C, Maegawa H, Usami N, Hanamoto H, Kudo C, Niwa H. Antagonist of transient receptor potential melastatin 2 suppresses mechanical hypersensitivity and activation of microglia induced by infraorbital nerve ligation in male rats. Biochem Biophys Res Commun 2023; 671:67-74. [PMID: 37295356 DOI: 10.1016/j.bbrc.2023.06.009] [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: 05/27/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
Activation of microglia is known to be involved in neuropathic pain. However, the pathway that regulates the microglial activation is not completely understood. Transient receptor potential (TRP) melastatin 2 (TRPM2), which is part of the TRP superfamily, is reportedly expressed on microglia and is suggested to be involved in neuropathic pain. To explore the effect of a TRPM2 antagonist on orofacial neuropathic pain and the relationship between TRPM2 and the activation of microglia, experiments were conducted using male rats that underwent infraorbital nerve (ION) ligation as orofacial neuropathic pain models. TRPM2 expression was detected on microglia in the trigeminal spinal subnucleus caudalis (Vc). The immunoreactivity of TRPM2 in the Vc increased after ION ligation. Mechanical threshold for head-withdrawal response was measured using von Frey filament, and it decreased after ION ligation. When the TRPM2 antagonist was administered to the ION-ligated rats, the low mechanical threshold for head-withdrawal response increased, and the number of phosphorylated extracellular signal-regulated kinase (pERK)-immunoreactive cells in the Vc decreased. The number of CD68-immunoreactive cells in the Vc also decreased after the administration of the TRPM2 antagonist in the ION-ligated rats. These findings suggest that TRPM2 antagonist administration suppresses hypersensitivity to mechanical stimulation induced by ION ligation and microglial activation, and TRPM2 is also involved in microglial activation in orofacial neuropathic pain.
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Affiliation(s)
- Chiaki Yoshikawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hiroharu Maegawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Nayuka Usami
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hiroshi Hanamoto
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Chiho Kudo
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hitoshi Niwa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
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Cerebroventricular administration of anti-calcitonin gene-related peptide antibody reduces the increase of dopamine D2 receptor observed in the trigeminal spinal subnucleus caudalis following infraorbital nerve ligation. Biochem Biophys Res Commun 2022; 614:78-84. [DOI: 10.1016/j.bbrc.2022.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 04/26/2022] [Accepted: 05/04/2022] [Indexed: 11/19/2022]
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KC E, Islam J, Kim S, Kim HK, Park YS. Pain Relief in a Trigeminal Neuralgia Model via Optogenetic Inhibition on Trigeminal Ganglion Itself With Flexible Optic Fiber Cannula. Front Cell Neurosci 2022; 16:880369. [PMID: 35573830 PMCID: PMC9096083 DOI: 10.3389/fncel.2022.880369] [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: 02/21/2022] [Accepted: 03/22/2022] [Indexed: 11/29/2022] Open
Abstract
The trigeminal ganglion (TG) is the primary site of aberration in trigeminal neuralgia (TN), and hence a crucial site where afferent input can be modulated. Here, we postulated that inhibiting TG via optogenetics using flexible optic cannula would diminish brainstem trigeminal nucleus caudalis (TNC) neuronal activity and pain behavior in TN rat model. Infraorbital nerve constriction was employed to induce TN in female Sprague-Dawley rats, while naive and sham rats served as controls. TG-directed microinjections of AAV virus containing either the optogenetic or null vector were delivered to rats in each group. In vivo electrophysiological responses were obtained from the ventral posteromedial nucleus (VPm) of the thalamus with simultaneous TG optogenetic stimulation using flexible optic cannula as well the effects on behavioral responses were investigated. Recordings in TN rats revealed a decrease in burst firing activity during yellow laser driven inhibition on TG, as well as considerably improved behavioral responses. In contrast, we noticed persistent hypersensitivity and increased tonic firing with blue laser stimulation which indicates that TG inhibition can synchronize trigeminal pain signal transmission in a TN animal model. The potential of an optogenetic approach in TG itself with flexible optic fiber to directly disrupt the trigeminal pain circuitry delivers fundamental underpinnings toward its prospective as a trigeminal neuralgia management.
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Affiliation(s)
- Elina KC
- Department of Medical Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Jaisan Islam
- Department of Medical Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Soochong Kim
- Department of Veterinary Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, South Korea
| | - Hyong Kyu Kim
- Department of Medicine and Microbiology, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Young Seok Park
- Department of Medical Neuroscience, College of Medicine, Chungbuk National University, Cheongju, South Korea
- Department of Neurosurgery, Chungbuk National University Hospital, Cheongju, South Korea
- *Correspondence: Young Seok Park, ;
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