1
|
Tian X, Wang WT, Zhang MM, Yang QQ, Xu YL, Wu JB, Xie XX, Wang JY, Wang JY. Red nucleus mGluR1 and mGluR5 facilitate the development of neuropathic pain through stimulating the expressions of TNF-α and IL-1β. Neurochem Int 2024; 178:105786. [PMID: 38843952 DOI: 10.1016/j.neuint.2024.105786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 05/17/2024] [Accepted: 06/01/2024] [Indexed: 06/10/2024]
Abstract
Our previous study has identified that glutamate in the red nucleus (RN) facilitates the development of neuropathic pain through metabotropic glutamate receptors (mGluR). Here, we further explored the actions and possible molecular mechanisms of red nucleus mGluR Ⅰ (mGluR1 and mGluR5) in the development of neuropathic pain induced by spared nerve injury (SNI). Our data indicated that both mGluR1 and mGluR5 were constitutively expressed in the RN of normal rats. Two weeks after SNI, the expressions of mGluR1 and mGluR5 were significantly boosted in the RN contralateral to the nerve injury. Administration of mGluR1 antagonist LY367385 or mGluR5 antagonist MTEP to the RN contralateral to the nerve injury at 2 weeks post-SNI significantly ameliorated SNI-induced neuropathic pain. However, unilateral administration of mGluRⅠ agonist DHPG to the RN of normal rats provoked a significant mechanical allodynia, this effect could be blocked by LY367385 or MTEP. Further studies indicated that the expressions of TNF-α and IL-1β in the RN were also elevated at 2 weeks post-SNI. Administration of mGluR1 antagonist LY367385 or mGluR5 antagonist MTEP to the RN at 2 weeks post-SNI significantly inhibited the elevations of TNF-α and IL-1β. However, administration of mGluR Ⅰ agonist DHPG to the RN of normal rats significantly enhanced the expressions of TNF-α and IL-1β, these effects were blocked by LY367385 or MTEP. These results suggest that activation of red nucleus mGluR1 and mGluR5 facilitate the development of neuropathic pain by stimulating the expressions of TNF-α and IL-1β. mGluR Ⅰ maybe potential targets for drug development and clinical treatment of neuropathic pain.
Collapse
Affiliation(s)
- Xue Tian
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China; Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China; Shaanxi Blood Center, Xi'an, 710061, Shaanxi, China
| | - Wen-Tao Wang
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Miao-Miao Zhang
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Qing-Qing Yang
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China; Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Ya-Li Xu
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Ji-Bo Wu
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Xin-Xin Xie
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China
| | - Jun-Yang Wang
- Department of Pathogenic Biology and Immunology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, China.
| | - Jing-Yuan Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
| |
Collapse
|
2
|
Duan D, Wang L, Feng Y, Hu D, Cui D. Picroside Ⅱ attenuates neuropathic pain by regulating inflammation and spinal excitatory synaptic transmission. Can J Physiol Pharmacol 2024; 102:281-292. [PMID: 37976472 DOI: 10.1139/cjpp-2023-0171] [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] [Indexed: 11/19/2023]
Abstract
Nerve injury induced microglia activation, which released inflammatory mediators and developed neuropathic pain. Picroside Ⅱ (PⅡ) attenuated neuropathic pain by inhibiting the neuroinflammation of the spinal dorsal horn; however, how it engaged in the cross talk between microglia and neurons remained ambiguous. This study aimed to investigate PⅡ in the modulation of spinal synaptic transmission mechanisms on pain hypersensitivity in neuropathic rats. We investigated the analgesia of PⅡ in mechanical and thermal hyperalgesia using the spinal nerve ligation (SNL)-induced neuropathic pain model and formalin-induced tonic pain model, respectively. RNA sequencing and network pharmacology were employed to screen core targets and signaling pathways. Immunofluorescence staining and qPCR were performed to explore the expression level of microglia and inflammatory mediator mRNA. The whole-cell patch-clamp recordings were utilized to record miniature excitatory postsynaptic currents in excitatory synaptic transmission. Our results demonstrated that the analgesic of PⅡ was significant in both pain models, and the underlying mechanism may involve inflammatory signaling pathways. PⅡ reversed the SNL-induced overexpression of microglia and inflammatory factors. Moreover, PⅡ dose dependently inhibited excessive glutamate transmission. Thus, this study suggested that PⅡ attenuated neuropathic pain by inhibiting excitatory glutamate transmission of spinal synapses, induced by an inflammatory response on microglia.
Collapse
Affiliation(s)
- Dongxia Duan
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai 201108, China
| | - Lian Wang
- School of Medicine, Tongji University, Shanghai 200092, China
- Department of Gynecology and Obstetrics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Yueyang Feng
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Daiyu Hu
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Donghong Cui
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai 201108, China
| |
Collapse
|
3
|
Zhu C, Lan X, Wei Z, Yu J, Zhang J. Allosteric modulation of G protein-coupled receptors as a novel therapeutic strategy in neuropathic pain. Acta Pharm Sin B 2024; 14:67-86. [PMID: 38239234 PMCID: PMC10792987 DOI: 10.1016/j.apsb.2023.07.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/09/2023] [Accepted: 07/12/2023] [Indexed: 01/22/2024] Open
Abstract
Neuropathic pain is a debilitating pathological condition that presents significant therapeutic challenges in clinical practice. Unfortunately, current pharmacological treatments for neuropathic pain lack clinical efficacy and often lead to harmful adverse reactions. As G protein-coupled receptors (GPCRs) are widely distributed throughout the body, including the pain transmission pathway and descending inhibition pathway, the development of novel neuropathic pain treatments based on GPCRs allosteric modulation theory is gaining momentum. Extensive research has shown that allosteric modulators targeting GPCRs on the pain pathway can effectively alleviate symptoms of neuropathic pain while reducing or eliminating adverse effects. This review aims to provide a comprehensive summary of the progress made in GPCRs allosteric modulators in the treatment of neuropathic pain, and discuss the potential benefits and adverse factors of this treatment. We will also concentrate on the development of biased agonists of GPCRs, and based on important examples of biased agonist development in recent years, we will describe universal strategies for designing structure-based biased agonists. It is foreseeable that, with the continuous improvement of GPCRs allosteric modulation and biased agonist theory, effective GPCRs allosteric drugs will eventually be available for the treatment of neuropathic pain with acceptable safety.
Collapse
Affiliation(s)
- Chunhao Zhu
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- School of Basic Medical Science, Ningxia Medical University, Yinchuan 750004, China
| | - Xiaobing Lan
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Zhiqiang Wei
- Medicinal Chemistry and Bioinformatics Center, Ocean University of China, Qingdao 266100, China
| | - Jianqiang Yu
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Jian Zhang
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- Medicinal Chemistry and Bioinformatics Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210023, China
| |
Collapse
|
4
|
Liu S, Yang S, Zhu X, Li X, Zhang X, Zhou X, Cheng H, Huo FQ, Mao Q, Liang L. Spinal apolipoprotein E is involved in inflammatory pain via regulating lipid metabolism and glial activation in the spinal dorsal horn. Biol Direct 2023; 18:85. [PMID: 38071369 PMCID: PMC10710718 DOI: 10.1186/s13062-023-00444-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
INTRODUCTION Inflammation and nerve injury promote astrocyte activation, which regulates the development and resolution of pain, in the spinal dorsal horn. APOE regulates lipid metabolism and is predominantly expressed in the astrocytes. However, the effect of astrocytic APOE and lipid metabolism on spinal cellular function is unclear. This study aimed to investigate the effect of spinal Apoe on spinal cellular functions using the complete Freund's adjuvant (CFA)-induced inflammatory pain mouse model. METHODS After intraplantar injection of CFA, we assessed pain behaviors in C57BL6 and Apoe knockout (Apoe-/-) mice using von Frey and Hargreaves' tests and analyzed dorsal horn samples (L4-5) using western blotting, immunofluorescence, quantitative real-time polymerase chain reaction, and RNA sequencing. RESULTS The Apoe levels were markedly upregulated at 2 h and on days 1 and 3 post-CFA treatment. Apoe was exclusively expressed in the astrocytes. Apoe-/- mice exhibited decreased pain on day 1, but not at 2 h, post-CFA treatment. Apoe-/- mice also showed decreased spinal neuron excitability and paw edema on day 1 post-CFA treatment. Global transcriptomic analysis of the dorsal horn on day 1 post-CFA treatment revealed that the differentially expressed mRNAs in Apoe-/- mice were associated with lipid metabolism and the immune system. Astrocyte activation was impaired in Apoe-/- mice on day 1 post-CFA treatment. The intrathecal injection of Apoe antisense oligonucleotide mitigated CFA-induced pain hypersensitivity. CONCLUSIONS Apoe deficiency altered lipid metabolism in astrocytes, exerting regulatory effects on immune response, astrocyte activation, and neuronal activity and consequently disrupting the maintenance of inflammatory pain after peripheral inflammation. Targeting APOE is a potential anti-nociception and anti-inflammatory strategy.
Collapse
Affiliation(s)
- Siyi Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Shuting Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Xuan Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, People's Republic of China
| | - Xiang Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Xi Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Xiaoqiong Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Hong Cheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
| | - Fu-Quan Huo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, People's Republic of China
| | - Qingxiang Mao
- Department of Anesthesiology, Daping Hospital, Army Medical University, Chongqing, People's Republic of China.
| | - Lingli Liang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.
- Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, People's Republic of China.
| |
Collapse
|
5
|
Ramirez-Garcia PD, Veldhuis NA, Bunnett NW, Davis TP. Targeting endosomal receptors, a new direction for polymers in nanomedicine. J Mater Chem B 2023; 11:5390-5399. [PMID: 37219363 PMCID: PMC10641892 DOI: 10.1039/d3tb00156c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this perspective, we outline a new opportunity for exploiting nanoparticle delivery of antagonists to target G-protein coupled receptors localized in intracellular compartments. We discuss the specific example of antagonizing endosomal receptors involved in pain to develop long-lasting analgesics but also outline the broader application potential of this delivery approach. We discuss the materials used to target endosomal receptors and indicate the design requirements for future successful applications.
Collapse
Affiliation(s)
- Paulina D Ramirez-Garcia
- Dentistry Translational Research Center, New York University College of Dentistry, New York, 10010, USA.
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, NY 10010, USA
| | - Nicholas A Veldhuis
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
| | - Nigel W Bunnett
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, NY 10010, USA
- Department of Neuroscience and Physiology, Neuroscience Institute, New York University Langone School of Medicine, New York, NY 10010, USA
| | - Thomas P Davis
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| |
Collapse
|
6
|
César MMJ, Alberto BCM, Gilberto SB, Patricia ST, Gloria VRA, Tommaso I. Persistent peripheral inflammation and pain induces immediate early gene activation in supraspinal nuclei in rats. Behav Brain Res 2023; 446:114395. [PMID: 36925049 DOI: 10.1016/j.bbr.2023.114395] [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: 10/17/2022] [Revised: 03/02/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
Pain is a public health concern worldwide and can present simultaneously with anxiety and depression. c-Fos is a marker used to identify activated cells in response to various stimuli. Specifically, it can be used as a brain marker of pain. We examined whether peripheral inflammation produces mechanical allodynia, anxiety- and depression-related behaviors in male rats (Rattus norvegicus, Wistar strain) and if these behaviors can have an impact on c-Fos expression in the supraspinal nuclei involved in pain control. We assessed mechanical thresholds by von Frey monofilaments, depression-like behaviors in the forced swimming test (FST) and anxiety-related behaviors in the open field test (OFT) after the administration of the inflamogen Complete Freund´s Adjuvant (CFA) in rats. We found that CFA increased paw diameter is all rats, however, CFA treatment resulted in a subgroup of rats developing allodynia [CFA- mechanical allodynia (CFA-MA)] and a subgroup of rats not developing allodynia [CFA-no mechanical allodynia (CFA-NMA)]. At the peak of tactile allodynia and inflammation, results were coupled with an increase in c-Fos expression in several supraspinal brain nuclei, i.e. basolateral amygdala, periaqueductal gray matter and rostroventromedial medulla in CFA-MA rats. Moreover, we found a correlation between c-Fos levels and mechanical thresholds. No modification in c-Fos expression was observed in CFA-NMA rats. CFA did not modulate behaviors in the OFT or FST. In summary, we show that mechanical allodynia but not peripheral inflammation activates c-Fos in several supraspinal nuclei, which sheds new light on brain regions involved in the control of pain following peripheral injury and decouples this effect from mere peripheral inflammation. This model may be used to study resistance to pain development in future studies.
Collapse
Affiliation(s)
- Morales-Medina Julio César
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico.
| | | | - Serrano-Bello Gilberto
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Sánchez-Teoyotl Patricia
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico; Maestría en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Vásquez-Ramírez Ana Gloria
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico; Facultad de Ciencias de la Salud, Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Iannitti Tommaso
- University of Ferrara, Department of Medical Sciences, Section of Experimental Medicine, Via Fossato di Montara, 70, 44121 Ferrara, Italy
| |
Collapse
|
7
|
Li YK, Zhang YY, Lin J, Liu YJ, Li YL, Feng YH, Zhao JS, Zhou C, Liu F, Shen JF. Metabotropic glutamate receptor 5-mediated inhibition of inward-rectifying K + channel 4.1 contributes to orofacial ectopic mechanical allodynia following inferior alveolar nerve transection in male mice. J Neurosci Res 2023; 101:1170-1187. [PMID: 36807930 DOI: 10.1002/jnr.25181] [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: 07/20/2022] [Revised: 01/20/2023] [Accepted: 01/31/2023] [Indexed: 02/20/2023]
Abstract
Inward-rectifying K+ channel 4.1 (Kir4.1), which regulates the electrophysiological properties of neurons and glia by affecting K+ homeostasis, plays a critical role in neuropathic pain. Metabotropic glutamate receptor 5 (mGluR5) regulates the expression of Kir4.1 in retinal Müller cells. However, the role of Kir4.1 and its expressional regulatory mechanisms underlying orofacial ectopic allodynia remain unclear. This study aimed to investigate the biological roles of Kir4.1 and mGluR5 in the trigeminal ganglion (TG) in orofacial ectopic mechanical allodynia and the role of mGluR5 in Kir4.1 regulation. An animal model of nerve injury was established via inferior alveolar nerve transection (IANX) in male C57BL/6J mice. Behavioral tests indicated that mechanical allodynia in the ipsilateral whisker pad lasted at least 14 days after IANX surgery and was alleviated by the overexpression of Kir4.1 in the TG, as well as intraganglionic injection of an mGluR5 antagonist (MPEP hydrochloride) or a protein kinase C (PKC) inhibitor (chelerythrine chloride); Conditional knockdown of the Kir4.1 gene downregulated mechanical thresholds in the whisker pad. Double immunostaining revealed that Kir4.1 and mGluR5 were co-expressed in satellite glial cells in the TG. IANX downregulated Kir4.1 and upregulated mGluR5 and phosphorylated PKC (p-PKC) in the TG; Inhibition of mGluR5 reversed the changes in Kir4.1 and p-PKC that were induced by IANX; Inhibition of PKC activation reversed the downregulation of Kir4.1 expression caused by IANX (p < .05). In conclusion, activation of mGluR5 in the TG after IANX contributed to orofacial ectopic mechanical allodynia by suppressing Kir4.1 via the PKC signaling pathway.
Collapse
Affiliation(s)
- Yi-Ke Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yan-Yan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiu Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ya-Jing Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yue-Ling Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yu-Heng Feng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jia-Shuo Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Cheng Zhou
- Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital of Sichuan University, Chengdu, China
| | - Fei Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jie-Fei Shen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, National Center of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| |
Collapse
|
8
|
Silamparasan D, Chang IF, Jinn TL. Calcium-dependent protein kinase CDPK16 phosphorylates serine-856 of glutamate receptor-like GLR3.6 protein leading to salt-responsive root growth in Arabidopsis . FRONTIERS IN PLANT SCIENCE 2023; 14:1093472. [PMID: 36818849 PMCID: PMC9935832 DOI: 10.3389/fpls.2023.1093472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Calcium-permeable channels in the plasma membrane play vital roles in plant growth, development, and response to environmental stimuli. Arabidopsis possesses 20 glutamate receptor-like proteins that share similarities with animal ionotropic glutamate receptors and mediate Ca2+ influx in plants. Calcium-dependent protein kinases (CDPKs) phosphorylate serine (Ser)-860 of glutamate receptor-like (GLR)3.7 protein, which interacts with 14-3-3ω and plays an essential role in salt and abscisic acid response in Arabidopsis by modulating Ca2+ signaling. However, the significance of CDPK- mediated phosphorylation status of Ser residues of GLR3.6 with regard to the functioning of GLR3.6 remains to be elucidated. In this study, we performed an in vitro kinase assay using CDPK16 and peptides containing the 14-3-3ω interacting domain of GLR3.6. We showed that Ser861/862 of GLR3.6 are required for the interaction with 14-3-3ω and that Ser856 of GLR3.6 is specifically phosphorylated by CDPK16 but not by CDPK3 and CDPK34. In addition, the expression of GLR3.6 was quickly downregulated by salt stress, and plants of glr3.6 mutants and GLR3.6-overexpression lines presented shorter and longer root lengths, respectively, under normal growth conditions than Col. Overexpression of the GLR3.6-Ser856 to Ala mutation resulted in a less sensitive phenotype in response to salt stress similar to glr3.6. Our results indicated that the Ser861/862 residues of GLR3.6 are required for interaction with 14-3-3ω. Additionally, the phosphorylation status of Ser856 residue of GLR3.6, which is mediated specifically by CDPK16, regulates root growth in normal and salt stress and conditions.
Collapse
Affiliation(s)
| | - Ing-Feng Chang
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
- Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Tsung-Luo Jinn
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
- Department of Life Science, National Taiwan University, Taipei, Taiwan
| |
Collapse
|
9
|
Ness TJ, DeWitte C, Randich A. The Double Insult of Neonatal Cystitis Plus Adult Somatic Inflammation Results in Corticotropin Releasing Factor Type II Receptor-Dependent Bladder Hypersensitivity in Female Rats. THE JOURNAL OF PAIN 2022; 23:2167-2178. [PMID: 36089237 PMCID: PMC9729390 DOI: 10.1016/j.jpain.2022.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 01/04/2023]
Abstract
The spinal mechanisms of visceral hypersensitivity are poorly understood, particularly when there is an interaction with somatic systems. Recently we demonstrated that rats which were pretreated with neonatal bladder inflammation (NBI) and subsequently pretreated as adults with bladder re-inflammation had augmented reflex and neuronal responses to urinary bladder distension via a corticotropin-releasing factor receptor type II (CRFR2) mechanism. Another insult producing similar augmented responses is somatic inflammation induced by Complete Freund's Adjuvant (CFA) in the hindlimb. Using neurochemical measures and both reflex and neuronal responses to urinary bladder distension as endpoints, the present study probed the role of CRFR2-related mechanisms in bladder hyperalgesia secondary to NBI and CFA-induced hindlimb inflammation. ELISA measures of the lumbosacral spinal cord demonstrated increased CRFR2 protein following pretreatment with NBI+CFA. Intrathecal CRFR2 antagonists blocked the augmentation of visceromotor responses to distension following pretreatment with both NBI+CFA. Lumbosacral dorsal horn neuronal responses to bladder distension in rats pretreated with NBI+CFA were attenuated by the spinal topical administration of a CRFR2 antagonist. These findings are the first demonstration of a somatovisceral interaction working via CRFR2 receptors and support the therapeutic value of these agents in the treatment of painful bladder disorders, particularly when triggered by somatic events. (Word Count 199). PERSPECTIVE: Bladder hypersensitivity occurs following neonatal cystitis and an adult insult such as somatic inflammation. This paper demonstrates that CRFR2-related mechanisms are associated with this hypersensitivity. This supports the therapeutic value of these agents in the treatment of painful bladder disorders, particularly when triggered by somatic events.
Collapse
Affiliation(s)
- Timothy J Ness
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
| | - Cary DeWitte
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Alan Randich
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| |
Collapse
|
10
|
Mazzitelli M, Presto P, Antenucci N, Meltan S, Neugebauer V. Recent Advances in the Modulation of Pain by the Metabotropic Glutamate Receptors. Cells 2022; 11:2608. [PMID: 36010684 PMCID: PMC9406805 DOI: 10.3390/cells11162608] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 01/22/2023] Open
Abstract
Metabotropic glutamate receptors (mGluR or mGlu) are G-protein coupled receptors activated by the binding of glutamate, the main classical neurotransmitter of the nervous system. Eight different mGluR subtypes (mGluR1-8) have been cloned and are classified in three groups based on their molecular, pharmacological and signaling properties. mGluRs mediate several physiological functions such as neuronal excitability and synaptic plasticity, but they have also been implicated in numerous pathological conditions including pain. The availability of new and more selective allosteric modulators together with the canonical orthosteric ligands and transgenic technologies has led to significant advances in our knowledge about the role of the specific mGluR subtypes in the pathophysiological mechanisms of various diseases. Although development of successful compounds acting on mGluRs for clinical use has been scarce, the subtype-specific-pharmacological manipulation might be a compelling approach for the treatment of several disorders in humans, including pain; this review aims to summarize and update on preclinical evidence for the roles of different mGluRs in the pain system and discusses knowledge gaps regarding mGluR-related sex differences and neuroimmune signaling in pain.
Collapse
Affiliation(s)
- Mariacristina Mazzitelli
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Peyton Presto
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Nico Antenucci
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Shakira Meltan
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Volker Neugebauer
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- 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
| |
Collapse
|
11
|
Li Y, Kang J, Xu Y, Li N, Jiao Y, Wang C, Wang C, Wang G, Yu Y, Yuan J, Zhang L. Artesunate Alleviates Paclitaxel-Induced Neuropathic Pain in Mice by Decreasing Metabotropic Glutamate Receptor 5 Activity and Neuroinflammation in Primary Sensory Neurons. Front Mol Neurosci 2022; 15:902572. [PMID: 35694442 PMCID: PMC9184756 DOI: 10.3389/fnmol.2022.902572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/09/2022] [Indexed: 11/22/2022] Open
Abstract
Experimental studies on the pathogenetic process of paclitaxel-induced neuropathic pain (PINP) have been initially carried out, but PINP still has no effective therapy. Recently reported studies have highlighted the involvement of glutamate receptors and neuroinflammation in peripheral and central nociceptive transmission in PINP. Artesunate is a first-line antimalarial drug with established efficacy in alleviating pain in a variety of pathologies. The current work assessed whether artesunate inhibits PINP by modulating metabotropic glutamate receptor 5 (mGluR5) and neuroinflammation in mice. The anti-hyperalgesic effect of artesunate was verified by assessing mechanical frequency and thermal latency in the paw withdrawal test as well as spontaneous pain. The expression levels of mGluR5, pain-related receptors and neuroinflammatory markers in dorsal root ganglion (DRG) were examined. In addition, treatment with CHPG and 2-methyl-6-(phenyl ethynyl) pyridine (MPEP) (mGluR5 agonist and antagonist, respectively) was performed to determine mGluR5’s role in the anti-hyperalgesic properties of artesunate. We demonstrated artesunate prevented PINP in a dose-dependent manner, while exerting a clear anti-hyperalgesic effect on already existing PINP. Artesunate normalized paclitaxel-related expression changes in DRG mGluR5, NR1, and GluA2, as well as six paclitaxel related neuroinflammation markers. Intrathecal application of MPEP treated PINP by reversing NR1 and GluA2 expression changes but had no effects on chemokines and inflammatory factors. Furthermore, artesunate treatment reversed acute pain following CHPG application. In conclusion, this study revealed that artesunate alleviates paclitaxel-induced hyperalgesia and spontaneous pain by decreasing DRG mGluR5 expression and neuroinflammation in the mouse model of PINP.
Collapse
Affiliation(s)
- Yize Li
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jiamin Kang
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Ying Xu
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Nan Li
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yang Jiao
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Chenxu Wang
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Chunyan Wang
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Guolin Wang
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yonghao Yu
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jingjing Yuan
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Jingjing Yuan,
| | - Linlin Zhang
- Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China
- Linlin Zhang,
| |
Collapse
|
12
|
Xia J, Dou Y, Mei Y, Munoz FM, Gao R, Gao X, Li D, Osei-Owusu P, Schiffenhaus J, Bekker A, Tao YX, Hu H. Orai1 is a crucial downstream partner of group I metabotropic glutamate receptor signaling in dorsal horn neurons. Pain 2022; 163:652-664. [PMID: 34252911 PMCID: PMC8741882 DOI: 10.1097/j.pain.0000000000002396] [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: 01/11/2021] [Accepted: 06/18/2021] [Indexed: 11/25/2022]
Abstract
ABSTRACT Group I metabotropic glutamate receptors (group I mGluRs) have been implicated in several central nervous system diseases including chronic pain. It is known that activation of group I mGluRs results in the production of inositol triphosphate (IP3) and diacylglycerol that leads to activation of extracellular signal-regulated kinases (ERKs) and an increase in neuronal excitability, but how group I mGluRs mediate this process remains unclear. We previously reported that Orai1 is responsible for store-operated calcium entry and plays a key role in central sensitization. However, how Orai1 is activated under physiological conditions is unknown. Here, we tested the hypothesis that group I mGluRs recruit Orai1 as part of its downstream signaling pathway in dorsal horn neurons. We demonstrate that neurotransmitter glutamate induces STIM1 puncta formation, which is not mediated by N-Methyl-D-aspartate (NMDA) or α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors. Glutamate-induced Ca2+ entry in the presence of NMDA or AMPA receptor antagonists is eliminated in Orai1-deficient neurons. Dihydroxyphenylglycine (DHPG) (an agonist of group I mGluRs)-induced Ca2+ entry is abolished by Orai1 deficiency, but not affected by knocking down of transient receptor potential cation channel 1 (TRPC1) or TRPC3. Dihydroxyphenylglycine-induced activation of ERKs and modulation of neuronal excitability are abolished in cultured Orai1-deficient neurons. Moreover, DHPG-induced nociceptive behavior is markedly reduced in Orai1-deficient mice. Our findings reveal previously unknown functional coupling between Orai1 and group I mGluRs and shed light on the mechanism underlying group I mGluRs-mediated neuronal plasticity.
Collapse
Affiliation(s)
- Jingsheng Xia
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - Yannong Dou
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - Yixiao Mei
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Frances M. Munoz
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - Ruby Gao
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - Xinghua Gao
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - Daling Li
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Patrick Osei-Owusu
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| | - James Schiffenhaus
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Alex Bekker
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Yuan-Xiang Tao
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Huijuan Hu
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ 07103
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA 19102
| |
Collapse
|
13
|
Sijben HJ, Superti-Furga G, IJzerman AP, Heitman LH. Targeting solute carriers to modulate receptor–ligand interactions. Trends Pharmacol Sci 2022; 43:358-361. [DOI: 10.1016/j.tips.2022.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/03/2022] [Accepted: 02/07/2022] [Indexed: 10/19/2022]
|
14
|
Zhang L, Zhao Y, Gao T, Zhang H, Li J, Wang G, Wang C, Li Y. Artesunate Reduces Remifentanil-induced Hyperalgesia and Peroxiredoxin-3 Hyperacetylation via Modulating Spinal Metabotropic Glutamate Receptor 5 in Rats. Neuroscience 2022; 487:88-98. [PMID: 35026318 DOI: 10.1016/j.neuroscience.2022.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 12/11/2022]
Abstract
The experimental investigations on the pathogenesis of remifentanil-induced hyperalgesia (RIH) have been primarily conducted, but the effective treatment of RIH remains unclear. Recent reports highlight the necessity of ionotropic glutamate receptors in oxidative damage in spinal nociceptive transduction. Artesunate, the 1st-line anti-malaria drug, has been identified to be valid in removing superoxide in several pathological conditions. This study evaluated whether artesunate inhibits RIH via regulating metabotropic glutamate receptor 5 (mGluR5) and mitochondrial antioxidant enzyme peroxiredoxin-3 in rats. Artesunate was injected intrathecally 10 min before intravenous infusion of remifentanil (1 μg·kg-1·min-1 for 60 min) in rats. The antinociception of artesunate was verified by assessment of paw withdrawal mechanical threshold and paw withdrawal thermal latency. Spinal mGluR5 expression and peroxiredoxin-3 hyperacetylation were examined. Also, both the mGluR5 agonist DHPG and antagonist MPEP were utilized to explore the involvement of mGluR5 in the anti-hyperalgesic property of artesunate. Here, we found that artesunate (10 μg and 100 μg but not 1 μg) prevented RIH in a dose-dependent manner. Artesunate reduced remifentanil-related spinal over-expression of mGluR5 gene and protein, and hyperacetylation of peroxiredoxin-3. Intrathecal application of MPEP (10 nmol and 100 nmol but not 1 nmol) inhibited behavioral RIH and peroxiredoxin-3 acetylation. Moreover, hyperalgesia and peroxiredoxin-3 hyperacetylation were attenuated after the combination of artesunate (1 μg) and MPEP (1 nmol). Additionally, artesunate treatment reversed acute pain and peroxiredoxin-3 hyperacetylation following spinal exposure to DHPG. In conclusion, intrathecal injection of artesunate impairs RIH by down-regulating spinal mGluR5 expression and peroxiredoxin-3 hyperacetylation-mediated oxidative stress in rats.
Collapse
Affiliation(s)
- Linlin Zhang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Yuying Zhao
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Tianyu Gao
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Haoyue Zhang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Jing Li
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Guolin Wang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Chunyan Wang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Yize Li
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China.
| |
Collapse
|
15
|
Chen H, Yu J, Hang L, Li S, Lu W, Xu Z. Evidence of the Involvement of Spinal EZH2 in the Development of Bone Cancer Pain in Rats. J Pain Res 2021; 14:3593-3600. [PMID: 34849017 PMCID: PMC8627314 DOI: 10.2147/jpr.s331114] [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: 07/26/2021] [Accepted: 11/11/2021] [Indexed: 11/26/2022] Open
Abstract
Introduction Bone cancer pain (BCP) seriously affects the quality of life of patients with advanced cancer, but effective treatment methods are lacking. This study mainly investigates the role of EZH2 in a well-established BCP model induced by Walker 256 breast cancer cells in rats. Methods Female Sprague–Dawley rats of the same age weighing approximately 160 g were selected for the experiment. The BCP model was established by injecting inactivated Walker 256 breast cancer cells into the tibia. von Frey filaments were used to measure the paw withdrawal threshold, and bone destruction in the rat was observed using x-ray. The spinal EZH2 and H3K27Tm levels were measured using Western blotting and RT–qPCR analysis. Intrathecal injection of an EZH2 inhibitor was performed to examine the role of EZH2 in trigeminal BCP. Results Experimental results showed that injecting Walker 256 breast cancer cells into the tibia induced bone cancer pain. Spinal EZH2 and H3K27Tm levels were significantly increased over time in BCP rats. An intrathecal injection of 3-deazaneplanocin A (DZNep), a selective EZH2 inhibitor, downregulated the expression of EZH2 and attenuate the BCP-induced mechanical allodynia state. Conclusion Intrathecal injection of DZNep relieve bone cancer pain in rats. EZH2 expressed in spinal cord tissue may be involved in the process of bone cancer pain in rats.
Collapse
Affiliation(s)
- Haoming Chen
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| | - Jianmang Yu
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| | - Lihua Hang
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| | - Shuai Li
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| | - Weikang Lu
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| | - Zhenkai Xu
- Department of Anesthesiology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu, 215300, People's Republic of China
| |
Collapse
|
16
|
Cytohesin-2 mediates group I metabotropic glutamate receptor-dependent mechanical allodynia through the activation of ADP ribosylation factor 6 in the spinal cord. Neurobiol Dis 2021; 159:105466. [PMID: 34390832 DOI: 10.1016/j.nbd.2021.105466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 07/20/2021] [Accepted: 08/02/2021] [Indexed: 01/15/2023] Open
Abstract
Group I metabotropic glutamate receptors (mGluRs), mGluR1 and mGluR5, in the spinal cord are implicated in nociceptive transmission and plasticity through G protein-mediated second messenger cascades leading to the activation of various protein kinases such as extracellular signal-regulated kinase (ERK). In this study, we demonstrated that cytohesin-2, a guanine nucleotide exchange factor for ADP ribosylation factors (Arfs), is abundantly expressed in subsets of excitatory interneurons and projection neurons in the superficial dorsal horn. Cytohesin-2 is enriched in the perisynapse on the postsynaptic membrane of dorsal horn neurons and forms a protein complex with mGluR5 in the spinal cord. Central nervous system-specific cytohesin-2 conditional knockout mice exhibited reduced mechanical allodynia in inflammatory and neuropathic pain models. Pharmacological blockade of cytohesin catalytic activity with SecinH3 similarly reduced mechanical allodynia and inhibited the spinal activation of Arf6, but not Arf1, in both pain models. Furthermore, cytohesin-2 conditional knockout mice exhibited reduced mechanical allodynia and ERK1/2 activation following the pharmacological activation of spinal mGluR1/5 with 3,5-dihydroxylphenylglycine (DHPG). The present study suggests that cytothesin-2 is functionally associated with mGluR5 during the development of mechanical allodynia through the activation of Arf6 in spinal dorsal horn neurons.
Collapse
|
17
|
Gonçalves-Monteiro S, Ribeiro-Oliveira R, Vieira-Rocha MS, Vojtek M, Sousa JB, Diniz C. Insights into Nuclear G-Protein-Coupled Receptors as Therapeutic Targets in Non-Communicable Diseases. Pharmaceuticals (Basel) 2021; 14:439. [PMID: 34066915 PMCID: PMC8148550 DOI: 10.3390/ph14050439] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 12/14/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) comprise a large protein superfamily divided into six classes, rhodopsin-like (A), secretin receptor family (B), metabotropic glutamate (C), fungal mating pheromone receptors (D), cyclic AMP receptors (E) and frizzled (F). Until recently, GPCRs signaling was thought to emanate exclusively from the plasma membrane as a response to extracellular stimuli but several studies have challenged this view demonstrating that GPCRs can be present in intracellular localizations, including in the nuclei. A renewed interest in GPCR receptors' superfamily emerged and intensive research occurred over recent decades, particularly regarding class A GPCRs, but some class B and C have also been explored. Nuclear GPCRs proved to be functional and capable of triggering identical and/or distinct signaling pathways associated with their counterparts on the cell surface bringing new insights into the relevance of nuclear GPCRs and highlighting the nucleus as an autonomous signaling organelle (triggered by GPCRs). Nuclear GPCRs are involved in physiological (namely cell proliferation, transcription, angiogenesis and survival) and disease processes (cancer, cardiovascular diseases, etc.). In this review we summarize emerging evidence on nuclear GPCRs expression/function (with some nuclear GPCRs evidencing atypical/disruptive signaling pathways) in non-communicable disease, thus, bringing nuclear GPCRs as targets to the forefront of debate.
Collapse
Affiliation(s)
- Salomé Gonçalves-Monteiro
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Rita Ribeiro-Oliveira
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Maria Sofia Vieira-Rocha
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Martin Vojtek
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Joana B. Sousa
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Carmen Diniz
- Laboratory of Pharmacology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; (S.G.-M.); (R.R.-O.); (M.S.V.-R.); (M.V.)
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| |
Collapse
|
18
|
Jiang ZJ, Li QY, Zhang YY, Zeng MX, Hu H, Zhang FM, Bi LB, Gu JH, Liu XJ. Deletion of MyD88 adaptor in nociceptor alleviates low-dose formalin-induced acute pain and persistent pain in mice. Neuroreport 2021; 32:378-385. [PMID: 33661805 DOI: 10.1097/wnr.0000000000001608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The myeloid differentiation factor 88 (MyD88) adaptor mediates signaling by Toll-like receptors and some interleukins (ILs) in neural and non-neuronal cells. Recently, MyD88 protein was found to express in primary sensory neurons and be involved in the maintenance of persistent pain induced by complete Freund's adjuvant, chronic constriction injury and chemotherapy treatment in rodents. However, whether MyD88 in nociceptive neurons contributes to persistent pain induced by intraplantar injection of formalin remains elusive. Here, using conditional knockout (CKO) mice, we found that selective deletion of Myd88 in Nav1.8-expressing primary nociceptive neurons led to reduced pain response in the recovery phase of 1% formalin-induced mechanical pain and impaired the persistent thermal pain. Moreover, CKO mice exhibited reduced phase II pain response in 1%, but not 5%, formalin-induced acute inflammatory pain. Finally, nociceptor MyD88 deletion resulted in less neuronal c-Fos activation in spinal dorsal horns following 1% formalin stimulation. These data suggest that MyD88 in nociceptive neurons is not only involved in persistent mechanical pain but also promotes the transition from acute inflammatory pain to persistent thermal hyperalgesia induced by low-dose formalin stimulation.
Collapse
Affiliation(s)
- Zuo-Jie Jiang
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Qing-Yi Li
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Ying-Ying Zhang
- Department of Anesthesiology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing
| | - Mei-Xing Zeng
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Han Hu
- Institute of Apicultural Research/Key Laboratory of Pollinating Insect Biology, Ministry of Agriculture, Chinese Academy of Agricultural Sciences, No. 1 Beigou Xiangshan, Beijing, China
| | - Feng-Ming Zhang
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Ling-Bo Bi
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Jia-Hui Gu
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| | - Xing-Jun Liu
- Pain and Related Disease Research Laboratory, Shantou University Medical College, Shantou, Guangdong Province
| |
Collapse
|
19
|
Increased immediate early gene activation in the basolateral amygdala following persistent peripheral inflammation. Neuroreport 2020; 31:724-729. [DOI: 10.1097/wnr.0000000000001480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
20
|
Xu L, Jiang H, Feng Y, Cao P, Ke J, Long X. Peripheral and central substance P expression in rat CFA-induced TMJ synovitis pain. Mol Pain 2020; 15:1744806919866340. [PMID: 31322474 PMCID: PMC6685108 DOI: 10.1177/1744806919866340] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Synovitis contributes to temporomandibular joint (TMJ) pain, nevertheless, the detailed nociceptive mechanism remains unclear. In this study, a rat model of TMJ synovitis was induced by intra-articular injection with complete Freund’s adjuvant (CFA). After CFA-induced synovitis, pain behaviors were observed. Then, TMJ, trigeminal ganglion, and trigeminal nucleus caudalis (TNC) tissues were collected, and immunohistochemistry was used to detect the expression of substance P (SP) and protein gene product 9.5 (PGP9.5) in the synovium tissue. Furthermore, the gene expression level of SP and PGP9.5 in synovium was detected by reverse transcription-polymerase chain reaction (RT-PCR). Afterwards, the expression of SP in the trigeminal ganglion and TNC and c-fos in the TNC was detected by immunohistochemistry. Compared with the control group, the expression of SP and PGP9.5 nerve fibers density and gene levels of them in the synovium tissue were significantly increased in CFA-induced TMJ synovitis rats. Similarly, SP expression in the trigeminal ganglion and TNC, and c-fos expression in the TNC were also obviously increased in CFA-induced TMJ synovitis rats. Collectively, CFA-induced rat TMJ synovitis resulted in obvious pain. This nociceptive reaction could be attributed to the augmented quantity of SP and PGP9.5 positive-stained nerve fibers distributed in the inflammatory synovium as well as enhanced SP expression in the trigeminal ganglion and TNC tissue. c-fos expression in the rat TNC illustrates CFA-induced TMJ synovitis can evoke the acute pain.
Collapse
Affiliation(s)
- Liqin Xu
- 1 State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Henghua Jiang
- 1 State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yaping Feng
- 1 State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Pinyin Cao
- 1 State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jin Ke
- 1 State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xing Long
- 2 Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| |
Collapse
|
21
|
Luo L, Huang M, Zhang Y, Wang W, Ma X, Shi H, Worley PF, Kim DK, Fedorovich SV, Jiang W, Xu T. Disabling phosphorylation at the homer ligand of the metabotropic glutamate receptor 5 alleviates complete Freund's adjuvant-induced inflammatory pain. Neuropharmacology 2020; 170:108046. [DOI: 10.1016/j.neuropharm.2020.108046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 02/23/2020] [Accepted: 03/06/2020] [Indexed: 10/24/2022]
|
22
|
Retamal JS, Ramírez-García PD, Shenoy PA, Poole DP, Veldhuis NA. Internalized GPCRs as Potential Therapeutic Targets for the Management of Pain. Front Mol Neurosci 2019; 12:273. [PMID: 31798411 PMCID: PMC6874167 DOI: 10.3389/fnmol.2019.00273] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 10/28/2019] [Indexed: 01/14/2023] Open
Abstract
Peripheral and central neurons in the pain pathway are well equipped to detect and respond to extracellular stimuli such as pro-inflammatory mediators and neurotransmitters through the cell surface expression of receptors that can mediate rapid intracellular signaling. Following injury or infection, activation of cell surface G protein-coupled receptors (GPCRs) initiates cell signaling processes that lead to the generation of action potentials in neurons or inflammatory responses such as cytokine secretion by immune cells. However, it is now appreciated that cell surface events alone may not be sufficient for all receptors to generate their complete signaling repertoire. Following an initial wave of signaling at the cell surface, active GPCRs can engage with endocytic proteins such as the adaptor protein β-arrestin (βArr) to promote clathrin-mediated internalization. Classically, βArr-mediated internalization of GPCRs was hypothesized to terminate signaling, yet for multiple GPCRs known to contribute to pain, it has been demonstrated that endocytosis can also promote a unique "second wave" of signaling from intracellular membranes, including those of endosomes and the Golgi, that is spatiotemporally distinct from initial cell-surface events. In the context of pain, understanding the cellular and molecular mechanisms that drive spatiotemporal signaling of GPCRs is invaluable for understanding how pain occurs and persists, and how current analgesics achieve efficacy or promote side-effects. This review article discusses the importance of receptor localization for signaling outcomes of pro- and anti-nociceptive GPCRs, and new analgesic opportunities emerging through the development of "location-biased" ligands that favor binding with intracellular GPCR populations.
Collapse
Affiliation(s)
- Jeffri S Retamal
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.,Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Parkville, VIC, Australia
| | - Paulina D Ramírez-García
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.,Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Parkville, VIC, Australia
| | - Priyank A Shenoy
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.,Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Parkville, VIC, Australia
| | - Daniel P Poole
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.,Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Parkville, VIC, Australia.,Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, VIC, Australia
| | - Nicholas A Veldhuis
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.,Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Parkville, VIC, Australia
| |
Collapse
|
23
|
Lai CC, Hsu JW, Cheng YS, Lin HH. Involvement of metabotropic glutamate receptor 5 in ethanol regulation of NMDA receptor activity in rat substantia gelatinosa neurons. Life Sci 2019; 233:116729. [PMID: 31386876 DOI: 10.1016/j.lfs.2019.116729] [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: 05/07/2019] [Revised: 06/28/2019] [Accepted: 08/02/2019] [Indexed: 11/17/2022]
Abstract
AIMS Glutamatergic receptors are important targets of ethanol. Intake of ethanol may produce analgesic effects. The present study examined the effects of ethanol on the activity of ionotropic glutamate receptors in spinal cord substantia gelatinosa (SG) neurons, critical neurons involved in nociceptive transmission. MAIN METHODS Whole-cell recordings were made from SG neurons of the lumbar spinal cord slices from 15 to 20-day-old rats. Ethanol and glutamate receptor agonists or antagonists were applied by superfusion. KEY FINDING Ethanol (50 and 100 mM) applied by superfusion for 5 min dose-dependently decreased the amplitude of evoked excitatory postsynaptic potential in SG neurons. Superfusion of ethanol (100 mM) for 15 min consistently inhibited NMDA- or AMPA-induced depolarizations in SG neurons. Ethanol (100 mM) also inhibited the depolarizations induced by glutamate. However, ethanol inhibition of glutamate-induced responses significantly decreased at 10-15 min following continuous superfusion, suggesting the development of acute tolerance to the inhibition during prolonged exposure. Application of MPEP hydrochloride (an antagonist of metabotropic glutamate receptor [mGluR] 5) or GF109203X (a protein kinase C [PKC] inhibitor), together with ethanol significantly blocked the tolerance. The inhibition by ethanol of the NMDA-induced, but not AMPA-induced, depolarizations significantly decreased at 15 min during continuous superfusion while ACPD (a mGluR agonist) was co-applied with ethanol. SIGNIFICANCE The results suggest that (1) ethanol exposure may inhibit ionotropic glutamate receptor-mediated neurotransmission; (2) regulation of NMDA receptor function by mGluR5/PKC pathways may be involved in the development of the tolerance to ethanol inhibition of glutamate-induced responses during prolonged exposure in SG neurons.
Collapse
Affiliation(s)
- Chih-Chia Lai
- Department of Pharmacology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970; Master and Ph.D. Programs in Pharmacology and Toxicology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Jhih-Wei Hsu
- Master Program in Medical Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Yi-Shan Cheng
- Master and Ph.D. Programs in Pharmacology and Toxicology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Hsun-Hsun Lin
- Master Program in Medical Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970; Department of Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970.
| |
Collapse
|
24
|
Okubo M, Yamanaka H, Kobayashi K, Noguchi K. Differential expression of mGluRs in rat spinal dorsal horns and their modulatory effects on nocifensive behaviors. Mol Pain 2019; 15:1744806919875026. [PMID: 31432760 PMCID: PMC6751533 DOI: 10.1177/1744806919875026] [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: 11/16/2022] Open
Abstract
Glutamate is a neurotransmitter present in most excitatory synapses in the nervous system. It also plays a key role in the spinal cord’s physiological excitatory circuit and is involved in pathological neurotransmissions such as those observed in inflammatory and neuropathic pain conditions. The actions of glutamate are mediated by different types of ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs). Although expressions of iGluRs are well studied, those of mGluRs are not fully elucidated in the spinal cord. In this study, we examined the expressions of mGluRs (mGluR1-8) and investigated which mGluR subtypes can modulate pain transmission in the dorsal horn of the spinal cord using an inflammatory pain model. Reverse transcription-polymerase chain reaction revealed that mGluR mRNAs, except for mGluR2 and 6, were detected in the spinal cord. Double labeling analysis, in situ hybridization histochemistry with immunohistochemistry, was used to examine the distribution of each mGluR in neurons or glial cells in the lamina I–II of the spinal dorsal horn. mGluR1, 5, and 7 were generally, and 4 and 8 were frequently, expressed in neurons. mGluR3 was expressed not only in neurons but also in oligodendrocytes. We next examined the distribution of mGluR4 and 8 were expressed in excitatory or inhibitory neurons. Both mGluR4 and 8 were preferentially expressed in inhibitory neurons rather than in excitatory neurons. Furthermore, intrathecal delivery of CPPG((RS)-α-cyclopropyl-4-phosphonophenylglycine), an antagonist for mGluR 4 and 8, attenuated nocifensive behaviors and the increase in fos-positive-excitatory neurons of the dorsal horn induced by intraplantar injection of formalin. These findings suggest that mGluR4 and 8, which are preferentially expressed in inhibitory neurons, may play roles in the modulation of pain transmission in the spinal dorsal horn.
Collapse
Affiliation(s)
- Masamichi Okubo
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Hiroki Yamanaka
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Kimiko Kobayashi
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Koichi Noguchi
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| |
Collapse
|
25
|
Erdinc M, Uyar E, Kelle I, Akkoc H. Anti-nociceptive effects of low dose ketamine in mice may be mediated by the serotonergic systems. PSYCHIAT CLIN PSYCH 2019. [DOI: 10.1080/24750573.2019.1605665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Meral Erdinc
- Department of Medical Pharmacology, Dicle University, Diyarbakir, Turkey
| | - Emre Uyar
- Department of Medical Pharmacology, Dicle University, Diyarbakir, Turkey
| | - Ilker Kelle
- Department of Medical Pharmacology, Dicle University, Diyarbakir, Turkey
| | - Hasan Akkoc
- Department of Medical Pharmacology, Dicle University, Diyarbakir, Turkey
| |
Collapse
|
26
|
Nucleoligands-repurposing G Protein-coupled Receptor Ligands to Modulate Nuclear-localized G Protein-coupled Receptors in the Cardiovascular System. J Cardiovasc Pharmacol 2019; 71:193-204. [PMID: 28858907 DOI: 10.1097/fjc.0000000000000535] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
There is significant evidence that internal pools of G protein-coupled receptors (GPCRs) exist and may be affected by both endogenous signaling molecules and hydrophobic pharmaceutical ligands, once assumed to only affect cell surface versions of these receptors. Here, we discuss evidence that the biology of nuclear GPCRs in particular is complex, rich, and highly interactive with GPCR signaling from the cell surface. Caging existing GPCR ligands may be an excellent means of further stratifying the phenotypic effects of known pharmacophores such as β-adrenergic, angiotensin II, and type B endothelin receptor ligands in the cardiovascular system. We describe some synthetic strategies we have used to design ligands to go from in cellulo to in vivo experiments. We also consider how surface and intracellular GPCR signaling might be integrated and ways to dissect this. If they could be selectively targeted, nuclear GPCRs and their associated nucleoligands would represent a completely novel area for exploration by Pharma.
Collapse
|
27
|
Pereira V, Goudet C. Emerging Trends in Pain Modulation by Metabotropic Glutamate Receptors. Front Mol Neurosci 2019; 11:464. [PMID: 30662395 PMCID: PMC6328474 DOI: 10.3389/fnmol.2018.00464] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 11/30/2018] [Indexed: 12/20/2022] Open
Abstract
Pain is an essential protective mechanism meant to prevent tissue damages in organisms. On the other hand, chronic or persistent pain caused, for example, by inflammation or nerve injury is long lasting and responsible for long-term disability in patients. Therefore, chronic pain and its management represents a major public health problem. Hence, it is critical to better understand chronic pain molecular mechanisms to develop innovative and efficient drugs. Over the past decades, accumulating evidence has demonstrated a pivotal role of glutamate in pain sensation and transmission, supporting glutamate receptors as promising potential targets for pain relieving drug development. Glutamate is the most abundant excitatory neurotransmitter in the brain. Once released into the synapse, glutamate acts through ionotropic glutamate receptors (iGluRs), which are ligand-gated ion channels triggering fast excitatory neurotransmission, and metabotropic glutamate receptors (mGluRs), which are G protein-coupled receptors modulating synaptic transmission. Eight mGluRs subtypes have been identified and are divided into three classes based on their sequence similarities and their pharmacological and biochemical properties. Of note, all mGluR subtypes (except mGlu6 receptor) are expressed within the nociceptive pathways where they modulate pain transmission. This review will address the role of mGluRs in acute and persistent pain processing and emerging pharmacotherapies for pain management.
Collapse
Affiliation(s)
- Vanessa Pereira
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, France
| | - Cyril Goudet
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, France
| |
Collapse
|
28
|
Liu C, Zhang Y, Liu Q, Jiang L, Li M, Wang S, Long T, He W, Kong X, Qin G, Chen L, Zhang Y, Zhou J. P2X4-receptor participates in EAAT3 regulation via BDNF-TrkB signaling in a model of trigeminal allodynia. Mol Pain 2018; 14:1744806918795930. [PMID: 30146940 PMCID: PMC6111400 DOI: 10.1177/1744806918795930] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Objective Previous studies of neuropathic pain have suggested that the P2X4
purinoceptor (P2X4R) in spinal microglia is essential for
maintaining allodynia following nerve injury. However, little is
known about its role in inflammatory soup-induced trigeminal
allodynia, which closely mimics chronic migraine status. Here,
we determined the contributions of P2X4R and related signaling
pathways in an inflammatory soup-induced trigeminal allodynia
model. Methods P2X4R gene and protein levels in the trigeminal nucleus caudalis
were analyzed following repeated dural inflammatory soup
infusions. p38, brain-derived neurotrophic factor, excitatory
amino acid transporter 3, c-Fos, and calcitonin gene-related
peptide protein levels in the trigeminal nucleus caudalis, as
well as trigeminal sensitivity, were assessed among the
different groups. Immunofluorescence staining was used to detect
protein localization and expression in the trigeminal nucleus
caudalis. Results Repeated inflammatory dural stimulation induced trigeminal
hyperalgesia and the upregulation of P2X4R. Immunofluorescence
revealed that P2X4R was expressed in trigeminal nucleus caudalis
microglial cells. Blockage of P2X4R produced an anti-nociceptive
effect, which was associated with an inhibition of inflammatory
soup-induced increases in p38, brain-derived neurotrophic
factor, excitatory amino acid transporter 3, c-Fos, and
calcitonin gene-related peptide protein levels. The tyrosine
receptor kinase B antagonist ANA-12 reversed trigeminal
allodynia and the upregulation of excitatory amino acid
transporter 3, c-Fos, and calcitonin gene-related peptide,
whereas the agonist 7,8-dihydroxyflavone exacerbated these
effects. Double immunostaining indicated that p38 and
brain-derived neurotrophic factor were mainly expressed in
microglial cells, whereas excitatory amino acid transporter 3
was primarily expressed in trigeminal nucleus caudalis
neurons. Conclusions These data indicate that microglial P2X4R is involved in the
regulation of excitatory amino acid transporter 3 via
brain-derived neurotrophic factor-tyrosine receptor kinase B
signaling following repeated inflammatory dural stimulation.
Microglial P2X4R activation and microglia–neuron interactions in
the trigeminal nucleus caudalis may play a role in the
pathogenesis of migraine chronicity, and the modulation of P2X4R
activation might be a potential therapeutic strategy.
Collapse
Affiliation(s)
- Chaoyang Liu
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yixin Zhang
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Qing Liu
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Li Jiang
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Maolin Li
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Sha Wang
- 2 Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Ting Long
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Wei He
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Xueying Kong
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Guangcheng Qin
- 2 Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Lixue Chen
- 2 Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yuhong Zhang
- 3 The Clinical Molecular Diagnostics Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Jiying Zhou
- 1 Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| |
Collapse
|
29
|
Knezevic NN, Yekkirala A, Yaksh TL. Basic/Translational Development of Forthcoming Opioid- and Nonopioid-Targeted Pain Therapeutics. Anesth Analg 2017; 125:1714-1732. [PMID: 29049116 PMCID: PMC5679134 DOI: 10.1213/ane.0000000000002442] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Opioids represent an efficacious therapeutic modality for some, but not all pain states. Singular reliance on opioid therapy for pain management has limitations, and abuse potential has deleterious consequences for patient and society. Our understanding of pain biology has yielded insights and opportunities for alternatives to conventional opioid agonists. The aim is to have efficacious therapies, with acceptable side effect profiles and minimal abuse potential, which is to say an absence of reinforcing activity in the absence of a pain state. The present work provides a nonexclusive overview of current drug targets and potential future directions of research and development. We discuss channel activators and blockers, including sodium channel blockers, potassium channel activators, and calcium channel blockers; glutamate receptor-targeted agents, including N-methyl-D-aspartate, α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid, and metabotropic receptors. Furthermore, we discuss therapeutics targeted at γ-aminobutyric acid, α2-adrenergic, and opioid receptors. We also considered antagonists of angiotensin 2 and Toll receptors and agonists/antagonists of adenosine, purine receptors, and cannabinoids. Novel targets considered are those focusing on lipid mediators and anti-inflammatory cytokines. Of interest is development of novel targeting strategies, which produce long-term alterations in pain signaling, including viral transfection and toxins. We consider issues in the development of druggable molecules, including preclinical screening. While there are examples of successful translation, mechanistically promising preclinical candidates may unexpectedly fail during clinical trials because the preclinical models may not recapitulate the particular human pain condition being addressed. Molecular target characterization can diminish the disconnect between preclinical and humans' targets, which should assist in developing nonaddictive analgesics.
Collapse
Affiliation(s)
- Nebojsa Nick Knezevic
- From the *Department of Anesthesiology, Advocate Illinois Masonic Medical Center Chicago, Illinois; Departments of †Anesthesiology and ‡Surgery, University of Illinois, Chicago, Illinois; §Department of Neurobiology, Harvard Medical School, and Boston Children's Hospital, Boston, Massachusetts; ‖Blue Therapeutics, Harvard Innovation Launch Lab, Allston, Massachusetts; and Departments of ¶Anesthesiology and #Pharmacology, University of California, San Diego, La Jolla, California
| | | | | |
Collapse
|
30
|
Lin Y, Liu L, Jiang H, Zhou J, Tang Y. Inhibition of interleukin-6 function attenuates the central sensitization and pain behavior induced by osteoarthritis. Eur J Pharmacol 2017; 811:260-267. [PMID: 28663035 DOI: 10.1016/j.ejphar.2017.06.032] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/22/2017] [Accepted: 06/26/2017] [Indexed: 02/06/2023]
Abstract
Chronic pain is the most prominent and disabling symptom in the patients with osteoarthritis (OA), and the underlying mechanism largely remains unclear. Interleukin-6 (IL-6), a proinflammatory cytokine, is critically involved in the development and maintenance of central sensitization in several rodent models of chronic pain. The present study aims to elucidate the IL-6 mediated neurological adaptation in dorsal horn in the rat with monosodium iodoacetate (MIA) - induced OA. Significant upregulation of IL-6 expression was detected in the dorsal horn in the modeled rats. Blockade of IL-6 function by tocilizumab markedly suppressed the activation of astrocytes and microglia in the ipsilateral dorsal horn, reduced c-Fos immunoreactivity in dorsal horn neurons, and attenuated the upregulation of glutamate receptor subunits GluR1 and NR2B in dorsal horn in the rats with MIA-induced OA. It was further reported that administration of tocilizumab significantly improved the performance in weight-bearing test and mitigated the mechanical allodynia in the modeled rats. These data illustrated spinal IL-6 mediated mechanism underlying the chronic pain, and proposed the potential therapeutic effect of tocilizumab on the chronic pain in the setting of OA.
Collapse
Affiliation(s)
- Yuangui Lin
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Lian Liu
- Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Sichuan University, Chengdu, Sichuan, China
| | - Haixia Jiang
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China; Department of Anesthesiology and Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jieshu Zhou
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Yuying Tang
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China.
| |
Collapse
|
31
|
Lin SF, Wang B, Zhang FM, Fei YH, Gu JH, Li J, Bi LB, Liu XJ. T-type calcium channels, but not Cav3.2, in the peripheral sensory afferents are involved in acute itch in mice. Biochem Biophys Res Commun 2017; 487:801-806. [DOI: 10.1016/j.bbrc.2017.04.127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 04/23/2017] [Indexed: 12/31/2022]
|
32
|
It's what's on the inside that counts: evidence for intracellular G-protein–coupled receptor signaling in inflammatory pain. Pain 2017; 158:541-542. [DOI: 10.1097/j.pain.0000000000000843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|