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Rahman MM, Jo YY, Kim YH, Park CK. Current insights and therapeutic strategies for targeting TRPV1 in neuropathic pain management. Life Sci 2024; 355:122954. [PMID: 39128820 DOI: 10.1016/j.lfs.2024.122954] [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: 04/24/2024] [Revised: 07/01/2024] [Accepted: 08/05/2024] [Indexed: 08/13/2024]
Abstract
Neuropathic pain, a common symptom of several disorders, exerts a substantial socioeconomic burden worldwide. Transient receptor potential vanilloid 1 (TRPV1), a non-selective cation channel predominantly ex-pressed in nociceptive neurons, plays a pivotal role in nociception, by detecting various endogenous and exogenous stimuli, including heat, pro-inflammatory mediators, and physical stressors. Dysregulation of TRPV1 signaling further contributes to the pathophysiology of neuropathic pain. Therefore, targeting TRPV1 is a promising strategy for developing novel analgesics with improved efficacy and safety profiles. Several pharmacological approaches to modulate TRPV1 activity, including agonists, antagonists, and biological TRPV1 RNA interference (RNAi, small interfering RNA [siRNA]) have been explored. Despite preclinical success, the clinical translation of TRPV1-targeted therapies has encountered challenges, including hyperthermia, hypothermia, pungency, and desensitization. Nevertheless, ongoing research efforts aim to refine TRPV1-targeted interventions through structural modifications, development of selective modulators, and discovery of natural, peptide-based drug candidates. Herein, we provide guidance for researchers and clinicians involved in the development of new interventions specifically targeting TRPV1 by reviewing the existing literature and highlighting current research activities. This study further discusses potential future research endeavors for enhancing the efficacy, safety, and tolerability of TRPV1 candidates, and thereby facilitates the translation of these discoveries into effective clinical interventions to alleviate neuropathic pain disorders.
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Affiliation(s)
- Md Mahbubur Rahman
- Gachon Pain Center and Department of Physiology, Gachon University College of Medicine, Incheon 21999, Republic of Korea
| | - Youn-Yi Jo
- Department of Anesthesiology and Pain Medicine, Gachon University, Gil Medical Center, Incheon 21565, Republic of Korea
| | - Yong Ho Kim
- Gachon Pain Center and Department of Physiology, Gachon University College of Medicine, Incheon 21999, Republic of Korea.
| | - Chul-Kyu Park
- Gachon Pain Center and Department of Physiology, Gachon University College of Medicine, Incheon 21999, Republic of Korea.
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2
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Xu Z, Lee MC, Sheehan K, Fujii K, Rabl K, Rader G, Varney S, Sharma M, Eilers H, Kober K, Miaskowski C, Levine JD, Schumacher MA. Chemotherapy for pain: reversing inflammatory and neuropathic pain with the anticancer agent mithramycin A. Pain 2024; 165:54-74. [PMID: 37366593 PMCID: PMC10723648 DOI: 10.1097/j.pain.0000000000002972] [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: 12/20/2021] [Revised: 02/08/2023] [Accepted: 04/25/2023] [Indexed: 06/28/2023]
Abstract
ABSTRACT The persistence of inflammatory and neuropathic pain is poorly understood. We investigated a novel therapeutic paradigm by targeting gene networks that sustain or reverse persistent pain states. Our prior observations found that Sp1-like transcription factors drive the expression of TRPV1, a pain receptor, that is blocked in vitro by mithramycin A (MTM), an inhibitor of Sp1-like factors. Here, we investigate the ability of MTM to reverse in vivo models of inflammatory and chemotherapy-induced peripheral neuropathy (CIPN) pain and explore MTM's underlying mechanisms. Mithramycin reversed inflammatory heat hyperalgesia induced by complete Freund adjuvant and cisplatin-induced heat and mechanical hypersensitivity. In addition, MTM reversed both short-term and long-term (1 month) oxaliplatin-induced mechanical and cold hypersensitivity, without the rescue of intraepidermal nerve fiber loss. Mithramycin reversed oxaliplatin-induced cold hypersensitivity and oxaliplatin-induced TRPM8 overexpression in dorsal root ganglion (DRG). Evidence across multiple transcriptomic profiling approaches suggest that MTM reverses inflammatory and neuropathic pain through broad transcriptional and alternative splicing regulatory actions. Mithramycin-dependent changes in gene expression following oxaliplatin treatment were largely opposite to and rarely overlapped with changes in gene expression induced by oxaliplatin alone. Notably, RNAseq analysis revealed MTM rescue of oxaliplatin-induced dysregulation of mitochondrial electron transport chain genes that correlated with in vivo reversal of excess reactive oxygen species in DRG neurons. This finding suggests that the mechanism(s) driving persistent pain states such as CIPN are not fixed but are sustained by ongoing modifiable transcription-dependent processes.
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Affiliation(s)
- Zheyun Xu
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Man-Cheung Lee
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Kayla Sheehan
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Keisuke Fujii
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
- Department of Anesthesiology, Wakayama Medical University, Wakayama, Japan
| | - Katalin Rabl
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Gabriella Rader
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Scarlett Varney
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Manohar Sharma
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Helge Eilers
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
| | - Kord Kober
- Department of Physiological Nursing, School of Nursing, University of California, San Francisco, CA, United States
| | - Christine Miaskowski
- Department of Physiological Nursing, School of Nursing, University of California, San Francisco, CA, United States
| | - Jon D. Levine
- Division of Neuroscience, Departments of Medicine and Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, CA, United States
| | - Mark A. Schumacher
- Department of Anesthesia and Perioperative Care and the UCSF Pain and Addiction Research Center, University of California, San Francisco, San Francisco, CA, United States
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Li T, Chung MK. Striving toward hyperthermia-free analgesia: lessons from loss-of-function mutations of human TRPV1. J Clin Invest 2023; 133:167338. [PMID: 36719371 PMCID: PMC9888373 DOI: 10.1172/jci167338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Transient receptor potential vanilloid 1 (TRPV1), a receptor for capsaicin and noxious heat, has been one of the most compelling targets for analgesics. However, systemic inhibition of TRPV1 is an impractical approach as a pain killer, since systemic antagonism induces hyperthermia. Two articles in this issue of the JCI report phenotypes from separate, rare missense mutations of human TRPV1. He, Zambelli, and colleagues investigated TRPV1K710N, which showed reduced functionality, while Katz, Zaguri, and co-authors reported on TRPV1N331K, which led to a complete functional knockout. The findings provide insights that will improve our understanding of the endogenous functions of TRPV1 in humans and may facilitate a rational TRPV1-targeting approach to achieve hyperthermia-free analgesia.
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Allison RL, Burand A, Torres DN, Brandow AM, Stucky CL, Ebert AD. Sickle cell disease patient plasma sensitizes iPSC-derived sensory neurons from sickle cell disease patients. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.10.523446. [PMID: 36711992 PMCID: PMC9882050 DOI: 10.1101/2023.01.10.523446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Individuals living with sickle cell disease (SCD) experience severe recurrent acute and chronic pain. In order to develop novel therapies, it is necessary to better understand the neurobiological mechanisms underlying SCD pain. There are many barriers to gaining mechanistic insight into pathogenic SCD pain processes, such as differential gene expression and function of sensory neurons between humans and mice with SCD, as well as the limited availability of patient samples. These can be overcome by utilizing SCD patient-derived induced pluripotent stem cells (iPSCs) differentiated into sensory neurons (SCD iSNs). Here, we characterize the key gene expression and function of SCD iSNs to establish a model for higher-throughput investigation of intrinsic and extrinsic factors that may contribute to increased SCD patient pain. Importantly, identified roles for C-C Motif Chemokine Ligand 2 (CCL2) and endothelin 1 (ET1) in SCD pain can be recapitulated in SCD iSNs. Further, we find that plasma taken from SCD patients during acute pain increases SCD iSN calcium response to the nociceptive stimulus capsaicin compared to those treated with paired SCD patient plasma at baseline or healthy control plasma samples. Together, these data provide the framework necessary to utilize iSNs as a powerful tool to investigate the neurobiology of SCD and identify potential intrinsic mechanisms of SCD pain which may extend beyond a blood-based pathology.
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Affiliation(s)
- Reilly L. Allison
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI
| | - Anthony Burand
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI
| | - Damaris Nieves Torres
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI
| | - Amanda M. Brandow
- Department of Pediatrics, Section of Hematology/Oncology/Bone Marrow Transplantation, Medical College of Wisconsin, Milwaukee, WI
| | - Cheryl L. Stucky
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI
| | - Allison D. Ebert
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI
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5
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Dong L, Zhou Q, Liang Q, Qiao Z, Liu Y, Shao L, Wang K. Identification of a Partial and Selective TRPV1 Agonist CPIPC for Alleviation of Inflammatory Pain. Molecules 2022; 27:molecules27175428. [PMID: 36080196 PMCID: PMC9457966 DOI: 10.3390/molecules27175428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Transient receptor potential vanilloid 1 (TRPV1) is a non-selective cation channel, predominantly expressed in a subset of peripheral sensory neurons for pain signaling. Topical application of agonist capsaicin for desensitizing TRPV1 currents has been approved for relief of chronic pain. However, the potent TRPV1 capsaicin is not ingestible and even topical capsaicin causes common side effects such as skin irritation, swelling, erythema and pruritus, suggesting that a mild TRPV1 agonist might be helpful for reducing side effects while reliving pain. In this study, we reported on a partial and selective TRPV1 agonist 4-(5-chloropyridin-2-yl)-N-(1H-indazol-6-yl)piperazine-1-carboxamide named CPIPC that was modified based on targeting the residue Arg557, important for conversion between the channel antagonism and agonism. Whole-cell patch clamp recordings indicated a concentration-dependent activation of TRPV1 currents by CPIPC with an EC50 of 1.56 ± 0.13 μM. The maximum efficacy of CPIPC (30 μM) was about 60% of saturated capsaicin (10 μM). Repetitive additions of CPIPC caused TRPV1 current desensitization in both TRPV1-expressing HEK293 cells and dorsal root ganglion (DRG) sensory neurons. Oral administration of CPIPC dose-dependently alleviated inflammatory pain in mice. Further site-directed mutagenesis combined with molecular docking revealed that residue Arg557 is critical for TRPV1 activation by CPIPC. Taken together, we identified a novel partial and selective TRPV1 agonist CPIPC that exhibits antinociceptive activity in mice.
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Affiliation(s)
- Liying Dong
- Departments of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao 266073, China
| | - Qiqi Zhou
- Department of Pharmacology, Qilu Medical University, Zibo 255300, China
| | - Qianqian Liang
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, No. 826 Zhangheng Road, Shanghai 201203, China
| | - Zhen Qiao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, No. 826 Zhangheng Road, Shanghai 201203, China
| | - Yani Liu
- Departments of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao 266073, China
- Institute of Innovative Drug Discovery, Qingdao University Medical College, 38 Dengzhou Road, Qingdao 266021, China
- Correspondence: (Y.L.); (L.S.); (K.W.)
| | - Liming Shao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, No. 826 Zhangheng Road, Shanghai 201203, China
- Correspondence: (Y.L.); (L.S.); (K.W.)
| | - Kewei Wang
- Departments of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao 266073, China
- Institute of Innovative Drug Discovery, Qingdao University Medical College, 38 Dengzhou Road, Qingdao 266021, China
- Correspondence: (Y.L.); (L.S.); (K.W.)
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6
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Liang Q, Qiao Z, Zhou Q, Xue D, Wang K, Shao L. Discovery of Potent and Selective Transient Receptor Potential Vanilloid 1 (TRPV1) Agonists with Analgesic Effects In Vivo Based on the Functional Conversion Induced by Altering the Orientation of the Indazole Core. J Med Chem 2022; 65:11658-11678. [PMID: 36008373 DOI: 10.1021/acs.jmedchem.2c00469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Transient receptor potential vanilloid 1 (TRPV1) is a promising target for developing antinociceptive agents. Here, we report the synthesis of N-indazole-4-aryl piperazine carboxamide analogues as TRPV1 modulators. The structure-activity relationship (SAR) reveals that substituting indazole at the 5-/6-position leads to TRPV1 agonism, whereas the 4- and 7-positions of indazole obtain mild antagonism and loss of activity, respectively. The whole-cell clamp patch assay shows that 28 is a potent and selective TRPV1 agonist and it relieves inflammatory and thermal pain by desensitizing the native TRPV1 current in the dorsal root ganglion (DRG) in mice. Additionally, site-directed mutagenesis combined with molecular docking shows an important hydrogen interaction between Arg557 and the indazole of 28. Taken together, our findings provide insight into TRPV1 agonism-antagonism conversion based on the interaction between indazole and Arg557, which provides a strategy to obtain new TRPV1 agonists by structural modification of antagonists. Compound 28 may be used as a lead compound for further optimization.
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Affiliation(s)
- Qianqian Liang
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Zhen Qiao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Qiqi Zhou
- Department of Pharmacology, Qilu Medical University, Zibo, Shandong 255300, China
| | - Dengqi Xue
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.,State Key Laboratory of Medical Neurobiology, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
| | - KeWei Wang
- Departments of Pharmacology, School of Pharmacy, Qingdao University Medical College, #1 Ningde Road, Qingdao 266073, China.,Institute of Innovative Drug Discovery, Qingdao University, 38 Dengzhou Road, Qingdao 266021, China
| | - Liming Shao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.,State Key Laboratory of Medical Neurobiology, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
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7
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Pétigny C, Dumont AA, Giguère H, Collette A, Holleran BJ, Iftinca M, Altier C, Besserer-Offroy É, Auger-Messier M, Leduc R. Monitoring TRPC7 Conformational Changes by BRET Following GPCR Activation. Int J Mol Sci 2022; 23:2502. [PMID: 35269644 PMCID: PMC8910688 DOI: 10.3390/ijms23052502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 02/06/2023] Open
Abstract
Transient receptor potential canonical (TRPC) channels are membrane proteins involved in regulating Ca2+ homeostasis, and whose functions are modulated by G protein-coupled receptors (GPCR). In this study, we developed bioluminescent resonance energy transfer (BRET) biosensors to better study channel conformational changes following receptor activation. For this study, two intramolecular biosensors, GFP10-TRPC7-RLucII and RLucII-TRPC7-GFP10, were constructed and were assessed following the activation of various GPCRs. We first transiently expressed receptors and the biosensors in HEK293 cells, and BRET levels were measured following agonist stimulation of GPCRs. The activation of GPCRs that engage Gαq led to a Gαq-dependent BRET response of the functional TRPC7 biosensor. Focusing on the Angiotensin II type-1 receptor (AT1R), GFP10-TRPC7-RLucII was tested in rat neonatal cardiac fibroblasts, expressing endogenous AT1R and TRPC7. We detected similar BRET responses in these cells, thus validating the use of the biosensor in physiological conditions. Taken together, our results suggest that activation of Gαq-coupled receptors induce conformational changes in a novel and functional TRPC7 BRET biosensor.
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Affiliation(s)
- Cécile Pétigny
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (C.P.); (A.C.); (B.J.H.)
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Audrey-Ann Dumont
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- Department of Medicine, Division of Cardiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Hugo Giguère
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- Department of Medicine, Division of Cardiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Audrey Collette
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (C.P.); (A.C.); (B.J.H.)
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Brian J. Holleran
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (C.P.); (A.C.); (B.J.H.)
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Mircea Iftinca
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB T2N 1N4, Canada; (M.I.); (C.A.)
| | - Christophe Altier
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB T2N 1N4, Canada; (M.I.); (C.A.)
| | - Élie Besserer-Offroy
- Department of Molecular and Medical Pharmacology, Ahmanson Translational Theranostics Division, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA 90095, USA;
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA 90095, USA
- California NanoSystems Institute, Los Angeles, CA 90095, USA
| | - Mannix Auger-Messier
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- Department of Medicine, Division of Cardiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Richard Leduc
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (C.P.); (A.C.); (B.J.H.)
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.-A.D.); (H.G.); (M.A.-M.)
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
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Wistrom E, Chase R, Smith PR, Campbell ZT. A compendium of validated pain genes. WIREs Mech Dis 2022; 14:e1570. [PMID: 35760453 PMCID: PMC9787016 DOI: 10.1002/wsbm.1570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/28/2022] [Accepted: 06/06/2022] [Indexed: 12/30/2022]
Abstract
The development of novel pain therapeutics hinges on the identification and rigorous validation of potential targets. Model organisms provide a means to test the involvement of specific genes and regulatory elements in pain. Here we provide a list of genes linked to pain-associated behaviors. We capitalize on results spanning over three decades to identify a set of 242 genes. They support a remarkable diversity of functions spanning action potential propagation, immune response, GPCR signaling, enzymatic catalysis, nucleic acid regulation, and intercellular signaling. Making use of existing tissue and single-cell high-throughput RNA sequencing datasets, we examine their patterns of expression. For each gene class, we discuss archetypal members, with an emphasis on opportunities for additional experimentation. Finally, we discuss how powerful and increasingly ubiquitous forward genetic screening approaches could be used to improve our ability to identify pain genes. This article is categorized under: Neurological Diseases > Genetics/Genomics/Epigenetics Neurological Diseases > Molecular and Cellular Physiology.
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Affiliation(s)
- Eric Wistrom
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Rebecca Chase
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Patrick R. Smith
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Zachary T. Campbell
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA,Center for Advanced Pain StudiesUniversity of Texas at DallasRichardsonTexasUSA
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9
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Li H, Bai F, Cong C, Chen B, Xie W, Li S, Liu Q, Chen C, Wu Y. Effects of ligustrazine on the expression of neurotransmitters in the trigeminal ganglion of a rat migraine model. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1318. [PMID: 34532455 PMCID: PMC8422085 DOI: 10.21037/atm-21-3423] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/12/2021] [Indexed: 11/06/2022]
Abstract
Background Migraine is one of the most common neurological diseases which has been treated by active substances from traditional Chinese medicine (TCM), such as ligustrazine, an extract of the Chinese herb Chuanxiong. However, the pathogenesis of migraine and the curative mechanisms of ligustrazine have remained unclear. The genes P2X3, TRPV1, ERK, and c-fos have been implicated to play a role. In this work, we attempted to elucidate the analgesic mechanism of ligustrazine using a classic migraine-representative rat model. Methods The migraine rat model was established by administration of nitroglycerin (NTG). Ligustrazine treatment was administered by intravenous injection. The animal's behavior was continuously recorded, and then trigeminal ganglions (TGs) were isolated. Total RNA was extracted from cells and total protein was extracted from TG. Quantitative real-time polymerase chain reaction (qRT-PCR) and western blot analyses were used to detect the levels of P2X3, TRPV1, c-Fos, and ERK in TG. Results Ligustrazine could reduce the neurological activities of NTG-induced migraine rats. The rats TG nerve showed varying degrees of expression of P2X3, TRPV1, c-Fos and ERK expression element. Ligustrazine could inhibit over-expression of P2X3, TRPV1, c-fos, and ERK in the TG nerve of NTG-induced migraine rats. Conclusions Our results demonstrated that ligustrazine had potent activity against NTG-induced migraine rats through inhibition of the c-fos/ERK signaling pathway. This work may provide a comprehensive basis for a better understanding of the pathogenesis of migraine and the curative mechanisms of ligustrazine.
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Affiliation(s)
- Hui Li
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Fanghui Bai
- Henan Provincial Key Laboratory of Stroke Prevention and Treatment, Nanyang Central Hospital, Nanyang, China
| | - Cong Cong
- Department of Cardiology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Baotian Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Wei Xie
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Shasha Li
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Qiang Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Chaojun Chen
- Department of Neurology, Guangzhou Hospital of Integrated Traditional and West Medicine, Guangzhou, China
| | - Yanhua Wu
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
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10
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Shang X, Zhang L, Jin R, Yang H, Tao H. Estrogen Regulation of the Expression of Pain Factor NGF in Rat Chondrocytes. J Pain Res 2021; 14:931-940. [PMID: 33859494 PMCID: PMC8043850 DOI: 10.2147/jpr.s297442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/11/2021] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE Pain is the main symptom of osteoarthritis (OA). Nerve growth factor (NGF) plays a crucial role in the generation of OA pain. And estrogen-alone used resulted in a sustained joint pain reduction in postmenopausal women. So we aim to find whether estrogen alters chondrocytes' NGF level, affecting OA pain. METHODS Primary chondrocytes and cartilage explants isolated from Sprague Dawley rat knees were cultured with physiological concentrations of estrogen (17β-Estradiol ≥ 98%, E2), Estrogen Receptor α (ERα) inhibitor and stimulants. Then, chondrocytes NGF mRNA expression and protein release were analyzed by a quantitative real-time polymerase chain reaction (qPCR) and enzyme-linked immunosorbent assay (ELISA) respectively. Additionally, cultures were pre-incubated with MEK-ERK inhibitor to identify the signaling pathway that estrogen alters NGF mRNA and protein levels. RESULTS We found that chondrocytes NGF expression and release were decreased by E2. E2 also reduced chondrocytes IL-1β-stimulated or TGF-β1-stimulated NGF expression. Phosphorylated extracellular signal-regulated kinasep1/2 (p-ERK1/2) signals were detected stronger than the control group by Western Blotting (WB). When we cultured chondrocytes with PD98059 (MEK-ERK inhibitor, PD), NGF mRNA expression was added to 1.41Ct (2.07±0.1 fold). CONCLUSION We showed that E2 reduces chondrocytes NGF expression significantly, even after stimulation by TGF-β1 or IL-1β. MEK-ERK signaling is involved in this process.
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Affiliation(s)
- Xiushuai Shang
- Department of Orthopedics Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Liaoran Zhang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Rilong Jin
- Department of Orthopedics Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Hu Yang
- Department of Orthopedics Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Hairong Tao
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
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11
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Abstract
The transient receptor potential vanilloid-1 (TRPV1) is a non-specific cation channel known for its sensitivity to pungent vanilloid compound (i.e. capsaicin) and noxious stimuli, including heat, low pH or inflammatory mediators. TRPV1 is found in the somatosensory system, particularly primary afferent neurons that respond to damaging or potentially damaging stimuli (nociceptors). Stimulation of TRPV1 evokes a burning sensation, reflecting a central role of the channel in pain. Pharmacological and genetic studies have validated TRPV1 as a therapeutic target in several preclinical models of chronic pain, including cancer, neuropathic, postoperative and musculoskeletal pain. While antagonists of TRPV1 were found to be a valuable addition to the pain therapeutic toolbox, their clinical use has been limited by detrimental side effects, such as hyperthermia. In contrast, capsaicin induces a prolonged defunctionalisation of nociceptors and thus opened the door to the development of a new class of therapeutics with long-lasting pain-relieving effects. Here we review the list of TRPV1 agonists undergoing clinical trials for chronic pain management, and discuss new indications, formulations or combination therapies being explored for capsaicin. While the analgesic pharmacopeia for chronic pain patients is ancient and poorly effective, modern TRPV1-targeted drugs could rapidly become available as the next generation of analgesics for a broad spectrum of pain conditions.
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Affiliation(s)
- Mircea Iftinca
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, Alberta, T2N 4N1, Canada
| | - Manon Defaye
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, Alberta, T2N 4N1, Canada
| | - Christophe Altier
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, Alberta, T2N 4N1, Canada.
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12
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Schecterson LC, Pazevic AA, Yang R, Matulef K, Gordon SE. TRPV1, TRPA1, and TRPM8 are expressed in axon terminals in the cornea: TRPV1 axons contain CGRP and secretogranin II; TRPA1 axons contain secretogranin 3. Mol Vis 2020; 26:576-587. [PMID: 32863706 PMCID: PMC7438417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 08/11/2020] [Indexed: 11/08/2022] Open
Abstract
Purpose The cornea is highly enriched in sensory neurons expressing the thermal TRP channels TRPV1, TRPA1, and TRPM8, and is an accessible tissue for study and experimental manipulation. The aim of this work was to provide a concise characterization of the expression patterns of various TRP channels and vesicular proteins in the mammalian cornea. Methods Immunohistochemistry (IHC) was performed using wholemount and cryostat tissue preparations of mouse and monkey corneas. The expression patterns of TRPV1 and TRPA1 were determined using specific antisera, and further colocalization was performed with antibodies directed against calcitonin-related gene protein (CGRP), neurofilament protein NF200, and the secretogranins ScgII and SCG3. The expression of TRPM8 was determined using corneas from mice expressing EGFP under the direction of a TRPM8 promoter (TRPM8EGFP mice). Laser scanning confocal microscopy and image analysis were performed. Results In the mouse cornea, TRPV1 and TRPM8 were expressed in distinct populations of small diameter C fibers extending to the corneal surface and ending either as simple or ramifying terminals, or in the case of TRPM8, as complex terminals. TRPA1 was expressed in large-diameter NF200-positive Aδ axons. TRPV1 and TRPA1 appeared to localize to separate intracellular vesicular structures and were primarily found in axons containing components of large dense vesicles with TRPV1 colocalizing with CGRP and ScgII, and TRPA1 colocalizing with SCG3. Monkey corneas showed similar colocalization of CGRP and TRPV1 on small-diameter axons extending to the epithelial surface. Conclusions The mouse cornea is abundant in sensory neurons expressing TRPV1, TRPM8, and TRPA1, and provides an accessible tissue source for implementing a live tissue preparation useful for further exploration of the molecular mechanisms of hyperalgesia. This study showed that surprisingly, these TRP channels localize to separate neurons in the mouse cornea and likely have unique physiological functions. The similar TRPV1 expression pattern we observed in the mouse and monkey corneas suggests that mice provide a reasonable initial model for understanding the role of these ion channels in higher mammalian corneal physiology.
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13
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Schecterson LC, Pazevic AA, Yang R, Matulef K, Gordon SE. TRPV1, TRPA1, and TRPM8 are expressed in axon terminals in the cornea: TRPV1 axons contain CGRP and secretogranin II; TRPA1 axons contain secretogranin 3. Mol Vis 2020; 26:392-404. [PMID: 38860239 PMCID: PMC11163611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 08/11/2020] [Indexed: 06/12/2024] Open
Abstract
Purpose The cornea is highly enriched in sensory neurons expressing the thermal TRP channels TRPV1, TRPA1, and TRPM8, and is an accessible tissue for study and experimental manipulation. The aim of this work was to provide a concise characterization of the expression patterns of various TRP channels and vesicular proteins in the mammalian cornea. Methods Immunohistochemistry (IHC) was performed using wholemount and cryostat tissue preparations of mouse and monkey corneas. The expression patterns of TRPV1 and TRPA1 were determined using specific antisera, and further colocalization was performed with antibodies directed against calcitonin-related gene protein (CGRP), neurofilament protein NF200, and the secretogranins ScgII and SCG3. The expression of TRPM8 was determined using corneas from mice expressing EGFP under the direction of a TRPM8 promoter (TRPM8EGFP mice). Laser scanning confocal microscopy and image analysis were performed. Results In the mouse cornea, TRPV1 and TRPM8 were expressed in distinct populations of small diameter C fibers extending to the corneal surface and ending either as simple or ramifying terminals, or in the case of TRPM8, as complex terminals. TRPA1 was expressed in large-diameter NF200-positive Aδ axons. TRPV1 and TRPA1 appeared to localize to separate intracellular vesicular structures and were primarily found in axons containing components of large dense vesicles with TRPV1 colocalizing with CGRP and ScgII, and TRPA1 colocalizing with SCG3. Monkey corneas showed similar colocalization of CGRP and TRPV1 on small-diameter axons extending to the epithelial surface. Conclusions The mouse cornea is abundant in sensory neurons expressing TRPV1, TRPM8, and TRPA1, and provides an accessible tissue source for implementing a live tissue preparation useful for further exploration of the molecular mechanisms of hyperalgesia. This study showed that surprisingly, these TRP channels localize to separate neurons in the mouse cornea and likely have unique physiological functions. The similar TRPV1 expression pattern we observed in the mouse and monkey corneas suggests that mice provide a reasonable initial model for understanding the role of these ion channels in higher mammalian corneal physiology.
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Affiliation(s)
- Leslayann C Schecterson
- Department of Physiology & Biophysics, University of Washington School of Medicine, Seattle, WA
| | - Alexander A Pazevic
- Department of Physiology & Biophysics, University of Washington School of Medicine, Seattle, WA
| | - Ruian Yang
- Department of Physiology & Biophysics, University of Washington School of Medicine, Seattle, WA
| | - Kimberly Matulef
- Department of Physiology & Biophysics, University of Washington School of Medicine, Seattle, WA
| | - Sharona E Gordon
- Department of Physiology & Biophysics, University of Washington School of Medicine, Seattle, WA
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14
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TRPV1, Targeted by miR-338-3p, Induces Neuropathic Pain by Interacting with NECAB2. J Mol Neurosci 2020; 71:55-65. [PMID: 32557241 DOI: 10.1007/s12031-020-01626-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 06/08/2020] [Indexed: 01/13/2023]
Abstract
A variety of studies have proposed that transient receptor potential vanilloid 1 (TRPV1) is involved in the progression of multiple diseases, including neuropathic pain. Although increased expression of TRPV1 in chronic constriction injury was described earlier, the underlying regulatory mechanisms of TRPV1 in neuropathic pain remain largely unknown. In our study, we constructed a chronic constriction injury (CCI) rat model to deeply analyze the mechanisms underlying TRPV1. RT-qPCR-indicated TRPV1 mRNA and protein expression were extremely upregulated in CCI rat dorsal spinal cord tissues. Then, TRPV1 was corroborated to interact with N-terminal EF-hand Ca2+-binding protein 2 (NECAB2). The mRNA and protein levels of NECAB2 were increased in CCI tissues. Moreover, TRPV1 and NECAB2 together regulated nociceptive procession-associated protein metabotropic glutamate receptor 5 (mGluR5), phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK1/2), and Ca2+ in isolated microglia of CCI rats. Moreover, TRPV1 upregulation apparently increased mechanical allodynia and thermal hyperalgesia as well as the expression of inflammation-associated genes (COX-2, TNF-α, and IL-6). In addition, downregulation of NECAB2 significantly decreased mechanical allodynia and thermal hyperalgesia as well as the expression of COX-2, TNF-α, and IL-6. Furthermore, TRPV1 was confirmed to be a downstream target of miR-338-3p. TRPV1 overexpression abolished the inhibitory effect by miR-338-3p elevation on neuropathic pain development. In summary, this study proved TRPV1, targeted by miR-338-3p, induced neuropathic pain by interacting with NECAB2, which provides a potential therapeutic target for neuropathic pain treatment.
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15
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Yin N, Gao Q, Tao W, Chen J, Bi J, Ding F, Wang Z. Paeoniflorin relieves LPS-induced inflammatory pain in mice by inhibiting NLRP3 inflammasome activation via transient receptor potential vanilloid 1. J Leukoc Biol 2020; 108:229-241. [PMID: 32083340 DOI: 10.1002/jlb.3ma0220-355r] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 02/03/2020] [Accepted: 02/10/2020] [Indexed: 12/13/2022] Open
Abstract
LPS has been widely used to induce inflammatory pain, attributing to production of inflammatory cytokines and sensitization of nociceptors. Paeoniflorin (PF) possesses anti-nociceptive property, but its effect on LPS-induced inflammatory pain has not been investigated. In this study, we aimed to investigate the analgesic effect of PF on an inflammatory pain mouse model and explore the underlying mechanisms. LPS-induced inflammatory pain model was established in C57BL/6J mice after PF treatment. Then, thermal hyperalgesia, neutrophil infiltration, inflammatory cytokine production, intracellular Ca2+ levels, PKC activity, transient receptor potential vanilloid 1 (TRPV-1) expression, NF-κB transcription, and NLPR3 inflammasome activation were assessed by thermal withdrawal latency, histopathology, ELISA, intracellular Ca2+ concentration, immunohistochemistry, and Western blot, separately. PF significantly relieved inflammatory pain and paw edema in mice with LPS-induced inflammatory pain. Additionally, PF inhibited neutrophil infiltration, inflammatory cytokine production (IL-1β, TNF-α, and IL-6), intracellular Ca2+ levels, and PKC activity as well as suppressed TRPV-1 expression, NF-κB transcription, and NLPR3 inflammasome activation in the footpad tissue samples. Importantly, capsaicin (TRPV-1 agonists) obviously reversed the pain-relieving effect of PF, suggesting the involvement of TRPV-1 in the analgesic activity of PF. Our results indicated PF ameliorated LPS-induced inflammation and pain in mice by inhibiting TRPV-1-mediated NLRP3 inflammasome activation. These findings suggest that PF can be as a potential pharmacological agent for inflammatory pain and thus deserves more attention and further investigation.
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Affiliation(s)
- Nina Yin
- Department of Anatomy, School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Qinghua Gao
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Wenting Tao
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Jiaojiao Chen
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Jing Bi
- Department of Pathogen Biology, School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Fengmin Ding
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Zhigang Wang
- Department of Pathogen Biology, School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
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16
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Yoo MH, Rhee Y, Jung J, Lee S, Moon J, Mo J, Chung P. TRPV1 regulates inflammatory process in the tongue of surgically induced xerostomia mouse. Head Neck 2019; 42:198-209. [DOI: 10.1002/hed.25980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 08/20/2019] [Accepted: 09/25/2019] [Indexed: 11/05/2022] Open
Affiliation(s)
- Min H. Yoo
- Department of Innovative Toxicology ResearchKorea Institute of Toxicology Daejeon Republic of Korea
| | - Yun‐Hee Rhee
- Laser Translational Clinical Trial CenterDankook University Hospital Cheonan Republic of Korea
- Beckman Laser Institute Korea, Dankook University Cheonan Republic of Korea
| | - JaeYun Jung
- Beckman Laser Institute Korea, Dankook University Cheonan Republic of Korea
- Department of OtorhinolaryngologyCollege of Medicine, Dankook University Cheonan Republic of Korea
| | - Sang‐Joon Lee
- Department of OtorhinolaryngologyCollege of Medicine, Dankook University Cheonan Republic of Korea
| | - Jung‐Hwan Moon
- Laser Translational Clinical Trial CenterDankook University Hospital Cheonan Republic of Korea
- Beckman Laser Institute Korea, Dankook University Cheonan Republic of Korea
- Department of OtorhinolaryngologyCollege of Medicine, Dankook University Cheonan Republic of Korea
| | - Ji‐Hun Mo
- Laser Translational Clinical Trial CenterDankook University Hospital Cheonan Republic of Korea
- Beckman Laser Institute Korea, Dankook University Cheonan Republic of Korea
- Department of OtorhinolaryngologyCollege of Medicine, Dankook University Cheonan Republic of Korea
| | - Phil‐Sang Chung
- Laser Translational Clinical Trial CenterDankook University Hospital Cheonan Republic of Korea
- Beckman Laser Institute Korea, Dankook University Cheonan Republic of Korea
- Department of OtorhinolaryngologyCollege of Medicine, Dankook University Cheonan Republic of Korea
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17
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Tsujimura T, Ueha R, Yoshihara M, Takei E, Nagoya K, Shiraishi N, Magara J, Inoue M. Involvement of the epithelial sodium channel in initiation of mechanically evoked swallows in anaesthetized rats. J Physiol 2019; 597:2949-2963. [PMID: 31032906 DOI: 10.1113/jp277895] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 04/25/2019] [Indexed: 12/17/2022] Open
Abstract
KEY POINTS Afferents carried by the superior laryngeal nerve play a primary role in the initiation of laryngeal mechanically evoked swallows in anaesthetized rats. Amiloride and its analogues inhibit swallowing evoked by mechanical stimulation, but not swallowing evoked by chemical and electrical stimulation. The epithelial sodium channel is probably involved in the initiation of laryngeal mechanically evoked swallows. ABSTRACT The swallowing reflex plays a critical role in airway protection. Because impaired laryngeal mechanosensation is associated with food bolus aspiration, it is important to know how the laryngeal sensory system regulates swallowing initiation. This study was performed to clarify the neuronal mechanism of mechanically evoked swallows. Urethane-anaesthetized Sprague-Dawley male rats were used. A swallow was identified by activation of the suprahyoid and thyrohyoid muscles on electromyography. The swallowing threshold was measured by von Frey filament and electrical stimulation of the larynx. The number of swallows induced by upper airway distension and capsaicin application (0.03 nmol, 3 μl) to the vocal folds was counted. The effects of topical application (0.3-30 nmol, 3 μl) of the epithelial sodium channel (ENaC) blocker amiloride and its analogues (benzamil and dimethylamiloride), acid-sensing ion channel (ASIC) inhibitors (mambalgine-1 and diminazene) and gadolinium to the laryngeal mucosa on swallowing initiation were evaluated. A nerve transection study indicated that afferents carried by the superior laryngeal nerve play a primary role in the initiation of laryngeal mechanically evoked swallows. The mechanical threshold of swallowing was increased in a dose-dependent manner by amiloride and its analogues and gadolinium, but not by ASIC inhibitors. The number of swallows by upper airway distension was significantly decreased by benzamil application. However, the initiation of swallows evoked by capsaicin and electrical stimulation was not affected by benzamil application. We speculate that the ENaC is involved in the initiation of laryngeal mechanically evoked swallows.
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Affiliation(s)
- Takanori Tsujimura
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Rumi Ueha
- Department of Otolaryngology, University of Tokyo, Tokyo, 113-8655, Japan
| | - Midori Yoshihara
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Eri Takei
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Kouta Nagoya
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Naru Shiraishi
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Jin Magara
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Makoto Inoue
- Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
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Upadhyay E, Mohammad AlMass AA, Dasgupta N, Rahman S, Kim J, Datta M. Assessment of Occupational Health Hazards Due to Particulate Matter Originated from Spices. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16091519. [PMID: 31035724 PMCID: PMC6538991 DOI: 10.3390/ijerph16091519] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/18/2019] [Accepted: 04/23/2019] [Indexed: 11/16/2022]
Abstract
Spices have been known for their various health activities; however, they also possess the allergic potential for the respiratory system and the skin as they are fine particulate matter. Persons involved in spice agriculture and food industries are at greater risk since they are exposed to a considerable amount of combustible dust, which may be the cause of fire and explosion and adversely affect the health. These workers may experience allergy, long-term and short-term respiratory issues including occupational asthma, dermatitis, etc. Some spices induce T cell-based inflammatory reaction upon contact recognition of the antigen. Antigen Presenting Cells (APC) on binding to the causative metabolite results in activation of macrophages by allergen cytokine interleukin (IL)-12 and tumor necrosis factor-beta (TNF). Cross-reactivity for protein allergens is another factor which seems to be a significant trigger for the stimulation of allergic reactions. Thus, it was imperative to perform a systematic review along with bioinformatics based representation of some evident allergens has been done to identify the overall conservation of epitopes. In the present manuscript, we have covered a multifold approach, i.e., to categorize the spice particles based on a clear understanding about nature, origin, mechanisms; to assess metabolic reactions of the particles after exposure as well as knowledge on the conditions of exposure along with associated potential health effects. Another aim of this study is to provide some suggestions to prevent and to control the exposure up to some extent.
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Affiliation(s)
- Era Upadhyay
- Amity institute of Biotechnology, Amity University Rajasthan, Jaipur, Rajasthan 302 002, India.
| | - Afnan Ahmad Mohammad AlMass
- Emergency Medicine Department, King Saud University Medical City, King Saud University, Riyadh 11321, Saudi Arabia.
| | - Nandita Dasgupta
- Department of Biotechnology, Institute of Engineering and Technology, Dr. APJ Abdul Kalam Technical University, Lucknow, Uttar Pradesh 226031, India.
| | - Safikur Rahman
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, 712-749, Korea.
| | - Jihoe Kim
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, 712-749, Korea.
| | - Manali Datta
- Amity institute of Biotechnology, Amity University Rajasthan, Jaipur, Rajasthan 302 002, India.
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Basso L, Aboushousha R, Fan CY, Iftinca M, Melo H, Flynn R, Agosti F, Hollenberg MD, Thompson R, Bourinet E, Trang T, Altier C. TRPV1 promotes opioid analgesia during inflammation. Sci Signal 2019; 12:12/575/eaav0711. [PMID: 30940767 DOI: 10.1126/scisignal.aav0711] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pain and inflammation are inherently linked responses to injury, infection, or chronic diseases. Given that acute inflammation in humans or mice enhances the analgesic properties of opioids, there is much interest in determining the inflammatory transducers that prime opioid receptor signaling in primary afferent nociceptors. Here, we found that activation of the transient receptor potential vanilloid type 1 (TRPV1) channel stimulated a mitogen-activated protein kinase (MAPK) signaling pathway that was accompanied by the shuttling of the scaffold protein β-arrestin2 to the nucleus. The nuclear translocation of β-arrestin2 in turn prevented its recruitment to the μ-opioid receptor (MOR), the subsequent internalization of agonist-bound MOR, and the suppression of MOR activity that occurs upon receptor desensitization. Using the complete Freund's adjuvant (CFA) inflammatory pain model to examine the role of TRPV1 in regulating endogenous opioid analgesia in mice, we found that naloxone methiodide (Nal-M), a peripherally restricted, nonselective, and competitive opioid receptor antagonist, slowed the recovery from CFA-induced hypersensitivity in wild-type, but not TRPV1-deficient, mice. Furthermore, we showed that inflammation prolonged morphine-induced antinociception in a mouse model of opioid receptor desensitization, a process that depended on TRPV1. Together, our data reveal a TRPV1-mediated signaling pathway that serves as an endogenous pain-resolution mechanism by promoting the nuclear translocation of β-arrestin2 to minimize MOR desensitization. This previously uncharacterized mechanism may underlie the peripheral opioid control of inflammatory pain. Dysregulation of the TRPV1-β-arrestin2 axis may thus contribute to the transition from acute to chronic pain.
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Affiliation(s)
- Lilian Basso
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Reem Aboushousha
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Churmy Yong Fan
- Hotchkiss Brain Institute, Cumming School of Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Mircea Iftinca
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Helvira Melo
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Robyn Flynn
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Francina Agosti
- Institute for Functional Genomics, CNRS UMR5203, INSERM U1191, University of Montpellier, LABEX ICST, Montpellier, France
| | - Morley D Hollenberg
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Roger Thompson
- Hotchkiss Brain Institute, Cumming School of Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Emmanuel Bourinet
- Institute for Functional Genomics, CNRS UMR5203, INSERM U1191, University of Montpellier, LABEX ICST, Montpellier, France
| | - Tuan Trang
- Hotchkiss Brain Institute, Cumming School of Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada
| | - Christophe Altier
- Department of Physiology and Pharmacology, Inflammation Research Network-Snyder Institute for Chronic Diseases and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N4N1, Canada.
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Lee YY, Saba E, Irfan M, Kim M, Chan JYL, Jeon BS, Choi SK, Rhee MH. The anti-inflammatory and anti-nociceptive effects of Korean black ginseng. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 54:169-181. [PMID: 30668366 DOI: 10.1016/j.phymed.2018.09.186] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/25/2018] [Accepted: 09/17/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Different processing conditions alter the ginseng bioactive compounds, promoting or reducing its anti-inflammatory effects. We compared black ginseng (BG) - that have been steamed 5 times - with red ginseng (RG). HYPOTHESIS/ PURPOSE To compare the anti-inflammatory activities and the anti-nociceptive properties of RG and BG. METHODS Nitric Oxide (NO) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) assay, quantitative Reverse Transcriptase-Polymerase Chain Reaction (qRT-PCR), western blot, xylene-induced ear edema, carrageenan-induced paw edema RESULTS: The ginsenoside contents were confirmed using high-performance liquid chromatography (HPLC) and has been altered through increased processing. The highest concentration of these extracts inhibited NO production to near-basal levels in lipopolysaccharide (LPS)-stimulated RAW 264.7 without exhibiting cytotoxicity. Pro-inflammatory cytokine expression at the mRNA level was investigated using qRT-PCR. Comparatively, BG exhibited better inhibition of pro-inflammatory mediators, iNOS and COX-2 and pro-inflammatory cytokines, IL-1β, IL-6 and TNF-α. Protein expression was determined using western blot analysis and BG exhibited stronger inhibition. Xylene-induced ear edema model in mice and carrageenan-induced paw edema in rats were carried out and tested with the effects of ginseng as well as dexamethasone and indomethacin - commonly used drugs. BG is a more potent anti-inflammatory agent, possesses anti-nociceptive properties, and has a strong potency comparable to the NSAIDs. CONCLUSION BG has more potent anti-inflammatory and anti-nociceptive effects due to the change in ginsenoside component with increased processing.
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Key Words
- Abbreviations: TLR, Toll-like receptor
- Anti-inflammation
- Anti-nociceptive
- Black ginseng
- COX-2, Cyclooxygenase-2
- Carrageenan-induced paw edema
- ERK, extracellular-signal-regulated kinases
- FBS, Fetal bovine serum
- I(max), Maximal inhibition
- IKK, inhibitor of kappa B kinase
- IL, Interleukin
- IκB/α, inhibitor kappa B-alpha
- JNK, c-Jun N-terminal kinases
- LPS, Lipopolysaccharides
- MAPK, mitogen-activated protein kinases
- NF-κB, Nuclear factor Kappa-B
- NO, Nitric oxide
- Panax ginseng
- TLR, Toll-like receptors
- TNF-α, Tumor necrotic factor alpha
- TRPV-1, transient receptor potential vanilloid 1
- Xylene-induced ear edema
- iNOS, inducible NO synthase
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Affiliation(s)
- Yuan Yee Lee
- Laboratory of Cell Signaling and Physiology, Department of Veterinary Medicine, Kyungpook National University, Daegu 41566, South Korea
| | - Evelyn Saba
- Laboratory of Cell Signaling and Physiology, Department of Veterinary Medicine, Kyungpook National University, Daegu 41566, South Korea
| | - Muhammad Irfan
- Laboratory of Cell Signaling and Physiology, Department of Veterinary Medicine, Kyungpook National University, Daegu 41566, South Korea
| | - Minki Kim
- Laboratory of Cell Signaling and Physiology, Department of Veterinary Medicine, Kyungpook National University, Daegu 41566, South Korea
| | - Jireh Yi-Le Chan
- Department of Finance, Universiti Tunku Abdul Rahman, Kampar 31900, Malaysia
| | - Byeong Seon Jeon
- Research Institute, Daedong Korea Ginseng Co., Geumsan-gun, Chungnam, South Korea
| | - Sung Keun Choi
- Research Institute, Daedong Korea Ginseng Co., Geumsan-gun, Chungnam, South Korea
| | - Man Hee Rhee
- Laboratory of Cell Signaling and Physiology, Department of Veterinary Medicine, Kyungpook National University, Daegu 41566, South Korea.; Cardiovascular Research Institute, Kyungpook National University, South Korea..
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21
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Xiang H, Liu Z, Wang F, Xu H, Roberts C, Fischer G, Stucky C, Caron D, Pan B, Hogan Q, Yu H. Primary sensory neuron-specific interference of TRPV1 signaling by AAV-encoded TRPV1 peptide aptamer attenuates neuropathic pain. Mol Pain 2018; 13:1744806917717040. [PMID: 28604222 PMCID: PMC5486490 DOI: 10.1177/1744806917717040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background TRPV1 (transient receptor potential vanilloid subfamily member 1) is a pain signaling channel highly expressed in primary sensory neurons. Attempts for analgesia by systemic TRPV1 blockade produce undesirable side effects, such as hyperthermia and impaired heat pain sensation. One approach for TRPV1 analgesia is to target TRPV1 along the peripheral sensory pathway. Results For functional blockade of TRPV1 signaling, we constructed an adeno-associated virus (AAV) vector expressing a recombinant TRPV1 interfering peptide aptamer, derived from a 38mer tetrameric assembly domain (TAD), encompassing residues 735 to 772 of rat TRPV1, fused to the C-terminus of enhanced green fluorescent protein (EGFP). AAV-targeted sensory neurons expressing EGFP-TAD after vector injection into the dorsal root ganglia (DRG) revealed decreased inward calcium current and diminished intracellular calcium accumulation in response to capsaicin, compared to neurons of naïve or expressing EGFP alone. To examine the potential for treating neuropathic pain, AAV-EGFP-TAD was injected into fourth and fifth lumbar (L) DRGs of rats subjected to neuropathic pain by tibial nerve injury (TNI). Results showed that AAV-directed selective expression of EGFP-TAD in L4/L5 DRG neuron somata, and their peripheral and central axonal projections can limit TNI-induced neuropathic pain behavior, including hypersensitivity to heat and, to a less extent, mechanical stimulation. Conclusion Selective inhibition of TRPV1 activity in primary sensory neurons by DRG delivery of AAV-encoded analgesic interfering peptide aptamers is efficacious in attenuation of neuropathic pain. With further improvements of vector constructs and in vivo application, this approach might have the potential to develop as an alternative gene therapy strategy to treat chronic pain, especially heat hypersensitivity, without complications due to systemic TRPV1 blockade.
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Affiliation(s)
- Hongfei Xiang
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Zhen Liu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Fei Wang
- Medical Experiment Center, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, P.R. China 712046
| | - Hao Xu
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, P. R. China 266000
| | - Christopher Roberts
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Gregory Fischer
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Cheryl Stucky
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Dean Caron
- Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295
| | - Bin Pan
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Quinn Hogan
- 5Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295
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22
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Granulocyte-colony-stimulating factor (G-CSF) signaling in spinal microglia drives visceral sensitization following colitis. Proc Natl Acad Sci U S A 2017; 114:11235-11240. [PMID: 28973941 DOI: 10.1073/pnas.1706053114] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Pain is a main symptom of inflammatory diseases and often persists beyond clinical remission. Although we have a good understanding of the mechanisms of sensitization at the periphery during inflammation, little is known about the mediators that drive central sensitization. Recent reports have identified hematopoietic colony-stimulating factors as important regulators of tumor- and nerve injury-associated pain. Using a mouse model of colitis, we identify the proinflammatory cytokine granulocyte-colony-stimulating factor (G-CSF or Csf-3) as a key mediator of visceral sensitization. We report that G-CSF is specifically up-regulated in the thoracolumbar spinal cord of colitis-affected mice. Our results show that resident spinal microglia express the G-CSF receptor and that G-CSF signaling mediates microglial activation following colitis. Furthermore, healthy mice subjected to intrathecal injection of G-CSF exhibit pronounced visceral hypersensitivity, an effect that is abolished by microglial depletion. Mechanistically, we demonstrate that G-CSF injection increases Cathepsin S activity in spinal cord tissues. When cocultured with microglia BV-2 cells exposed to G-CSF, dorsal root ganglion (DRG) nociceptors become hyperexcitable. Blocking CX3CR1 or nitric oxide production during G-CSF treatment reduces excitability and G-CSF-induced visceral pain in vivo. Finally, administration of G-CSF-neutralizing antibody can prevent the establishment of persistent visceral pain postcolitis. Overall, our work uncovers a DRG neuron-microglia interaction that responds to G-CSF by engaging Cathepsin S-CX3CR1-inducible NOS signaling. This interaction represents a central step in visceral sensitization following colonic inflammation, thereby identifying spinal G-CSF as a target for treating chronic abdominal pain.
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23
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Shang X, Wang Z, Tao H. Mechanism and therapeutic effectiveness of nerve growth factor in osteoarthritis pain. Ther Clin Risk Manag 2017; 13:951-956. [PMID: 28814877 PMCID: PMC5546917 DOI: 10.2147/tcrm.s139814] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Osteoarthritis (OA) is the most common form of articular joint arthritis and a cause of significant morbidity. In this review, we present the role of nerve growth factor (NGF) in pain generation, relationship between NGF and OA pain, and pathogenic factors (interleukin-1β, transforming growth factor-β1, mechanical loading, and adipokines) involved in OA development. Since NGF blocking is an efficient way to inhibit OA-associated pain, we summarize four categories of drugs that target NGF/tropomyosin receptor kinase A (TrkA) signaling. In addition, we discuss the future of NGF/TrkA antagonists and underline their potential for use in OA pain relief. A better understanding of the causes and treatment of OA will facilitate the development of more effective methods of OA pain management.
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Affiliation(s)
- Xiushuai Shang
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Zhaofei Wang
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Hairong Tao
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
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24
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Ruigrok HJ, Shahid G, Goudeau B, Poulletier de Gannes F, Poque-Haro E, Hurtier A, Lagroye I, Vacher P, Arbault S, Sojic N, Veyret B, Percherancier Y. Full-Spectral Multiplexing of Bioluminescence Resonance Energy Transfer in Three TRPV Channels. Biophys J 2017; 112:87-98. [PMID: 28076819 DOI: 10.1016/j.bpj.2016.11.3197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 11/17/2016] [Accepted: 11/21/2016] [Indexed: 12/31/2022] Open
Abstract
Multiplexed bioluminescence resonance energy transfer (BRET) assays were developed to monitor the activation of several functional transient receptor potential (TRP) channels in live cells and in real time. We probed both TRPV1 intramolecular rearrangements and its interaction with Calmodulin (CaM) under activation by chemical agonists and temperature. Our BRET study also confirmed that: (1) capsaicin and heat promoted distinct transitions, independently coupled to channel gating, and that (2) TRPV1 and Ca2+-bound CaM but not Ca2+-free CaM were preassociated in resting live cells, while capsaicin activation induced both the formation of more TRPV1/CaM complexes and conformational changes. The BRET assay, based on the interaction with Calmodulin, was successfully extended to TRPV3 and TRPV4 channels. We therefore developed a full-spectral three-color BRET assay for analyzing the specific activation of each of the three TRPV channels in a single sample. Such key improvement in BRET measurement paves the way for the simultaneous monitoring of independent biological pathways in live cells.
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Affiliation(s)
- Hermanus Johannes Ruigrok
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Guillaume Shahid
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Bertrand Goudeau
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Florence Poulletier de Gannes
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Emmanuelle Poque-Haro
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Annabelle Hurtier
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Isabelle Lagroye
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France; Paris Sciences et Lettres Research University, Paris, France
| | - Pierre Vacher
- Université de Bordeaux, Talence, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1218, Institut Bergonié, Bordeaux, France
| | - Stéphane Arbault
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Neso Sojic
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Bernard Veyret
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Yann Percherancier
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France.
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25
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Song S, Ayon RJ, Yamamura A, Yamamura H, Dash S, Babicheva A, Tang H, Sun X, Cordery AG, Khalpey Z, Black SM, Desai AA, Rischard F, McDermott KM, Garcia JGN, Makino A, Yuan JXJ. Capsaicin-induced Ca 2+ signaling is enhanced via upregulated TRPV1 channels in pulmonary artery smooth muscle cells from patients with idiopathic PAH. Am J Physiol Lung Cell Mol Physiol 2016; 312:L309-L325. [PMID: 27979859 DOI: 10.1152/ajplung.00357.2016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 12/14/2016] [Accepted: 12/14/2016] [Indexed: 12/24/2022] Open
Abstract
Capsaicin is an active component of chili pepper and a pain relief drug. Capsaicin can activate transient receptor potential vanilloid 1 (TRPV1) channels to increase cytosolic Ca2+ concentration ([Ca2+]cyt). A rise in [Ca2+]cyt in pulmonary artery smooth muscle cells (PASMCs) is an important stimulus for pulmonary vasoconstriction and vascular remodeling. In this study, we observed that a capsaicin-induced increase in [Ca2+]cyt was significantly enhanced in PASMCs from patients with idiopathic pulmonary arterial hypertension (IPAH) compared with normal PASMCs from healthy donors. In addition, the protein expression level of TRPV1 in IPAH PASMCs was greater than in normal PASMCs. Increasing the temperature from 23 to 43°C, or decreasing the extracellular pH value from 7.4 to 5.9 enhanced capsaicin-induced increases in [Ca2+]cyt; the acidity (pH 5.9)- and heat (43°C)-mediated enhancement of capsaicin-induced [Ca2+]cyt increases were greater in IPAH PASMCs than in normal PASMCs. Decreasing the extracellular osmotic pressure from 310 to 200 mOsmol/l also increased [Ca2+]cyt, and the hypo-osmolarity-induced rise in [Ca2+]cyt was greater in IPAH PASMCs than in healthy PASMCs. Inhibition of TRPV1 (with 5'-IRTX or capsazepine) or knockdown of TRPV1 (with short hairpin RNA) attenuated capsaicin-, acidity-, and osmotic stretch-mediated [Ca2+]cyt increases in IPAH PASMCs. Capsaicin induced phosphorylation of CREB by raising [Ca2+]cyt, and capsaicin-induced CREB phosphorylation were significantly enhanced in IPAH PASMCs compared with normal PASMCs. Pharmacological inhibition and knockdown of TRPV1 attenuated IPAH PASMC proliferation. Taken together, the capsaicin-mediated [Ca2+]cyt increase due to upregulated TRPV1 may be a critical pathogenic mechanism that contributes to augmented Ca2+ influx and excessive PASMC proliferation in patients with IPAH.
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Affiliation(s)
- Shanshan Song
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Ramon J Ayon
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Aya Yamamura
- Kinjo Gakuin University School of Pharmacy, Nagoya, Japan; and
| | - Hisao Yamamura
- Nagoya City University Graduate School of Pharmaceutical Sciences, Nagoya, Japan
| | - Swetaleena Dash
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Aleksandra Babicheva
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Haiyang Tang
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Xutong Sun
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Arlette G Cordery
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Zain Khalpey
- Department of Surgery, The University of Arizona College of Medicine, Tucson, Arizona
| | - Stephen M Black
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Physiology, The University of Arizona College of Medicine, Tucson, Arizona
| | - Ankit A Desai
- Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Franz Rischard
- Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Kimberly M McDermott
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Joe G N Garcia
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona
| | - Ayako Makino
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Physiology, The University of Arizona College of Medicine, Tucson, Arizona
| | - Jason X-J Yuan
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, Arizona; .,Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona.,Department of Physiology, The University of Arizona College of Medicine, Tucson, Arizona
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26
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Iftinca M, Flynn R, Basso L, Melo H, Aboushousha R, Taylor L, Altier C. The stress protein heat shock cognate 70 (Hsc70) inhibits the Transient Receptor Potential Vanilloid type 1 (TRPV1) channel. Mol Pain 2016; 12:12/0/1744806916663945. [PMID: 27558883 PMCID: PMC5006304 DOI: 10.1177/1744806916663945] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 07/11/2016] [Indexed: 01/02/2023] Open
Abstract
Background Specialized cellular defense mechanisms prevent damage from chemical, biological, and physical hazards. The heat shock proteins have been recognized as key chaperones that maintain cell survival against a variety of exogenous and endogenous stress signals including noxious temperature. However, the role of heat shock proteins in nociception remains poorly understood. We carried out an expression analysis of the constitutively expressed 70 kDa heat-shock cognate protein, a member of the stress-induced HSP70 family in lumbar dorsal root ganglia from a mouse model of Complete Freund’s Adjuvant-induced chronic inflammatory pain. We used immunolabeling of dorsal root ganglion neurons, behavioral analysis and patch clamp electrophysiology in both dorsal root ganglion neurons and HEK cells transfected with Hsc70 and Transient Receptor Potential Channels to examine their functional interaction in heat shock stress condition. Results We report an increase in protein levels of Hsc70 in mouse dorsal root ganglia, 3 days post Complete Freund’s Adjuvant injection in the hind paw. Immunostaining of Hsc70 was observed in most of the dorsal root ganglion neurons, including the small size nociceptors immunoreactive to the TRPV1 channel. Standard whole-cell patch-clamp technique was used to record Transient Receptor Potential Vanilloid type 1 current after exposure to heat shock. We found that capsaicin-evoked currents are inhibited by heat shock in dorsal root ganglion neurons and transfected HEK cells expressing Hsc70 and TRPV1. Blocking Hsc70 with matrine or spergualin compounds prevented heat shock-induced inhibition of the channel. We also found that, in contrast to TRPV1, both the cold sensor channels TRPA1 and TRPM8 were unresponsive to heat shock stress. Finally, we show that inhibition of TRPV1 depends on the ATPase activity of Hsc70 and involves the rho-associated protein kinase. Conclusions Our work identified Hsc70 and its ATPase activity as a central cofactor of TRPV1 channel function and points to the role of this stress protein in pain associated with neurodegenerative and/or metabolic disorders, including aging.
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Affiliation(s)
- Mircea Iftinca
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Robyn Flynn
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Lilian Basso
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Helvira Melo
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Reem Aboushousha
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Lauren Taylor
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
| | - Christophe Altier
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Canada
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27
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Park S, Zhang X, Lee NR, Jin HS. TRPV1 Gene Polymorphisms Are Associated with Type 2 Diabetes by Their Interaction with Fat Consumption in the Korean Genome Epidemiology Study. JOURNAL OF NUTRIGENETICS AND NUTRIGENOMICS 2016; 9:47-61. [DOI: 10.1159/000446499] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 04/25/2016] [Indexed: 11/19/2022]
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28
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Ogawa N, Kurokawa T, Mori Y. Sensing of redox status by TRP channels. Cell Calcium 2016; 60:115-22. [PMID: 26969190 DOI: 10.1016/j.ceca.2016.02.009] [Citation(s) in RCA: 315] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 11/17/2022]
Abstract
Cellular redox status is maintained by the balance between series of antioxidant systems and production of reactive oxygen/nitrogenous species. Cells utilize this redox balance to mediate diverse physiological functions. Transient receptor potential (TRP) channels are non-selective cation channels that act as biosensors for environmental and noxious stimuli, such as capsaicin and allicin, as well as changes in temperature and conditions inside the cell. TRP channels also have an emerging role as essential players in detecting cellular redox status to regulate cellular signals mediating physiological phenomena. Reactive species activate TRP channels either directly through oxidative amino acid modifications or indirectly through second messengers. For instance, TRPA1, TRPV1 and TRPC5 channels are directly activated by oxidizing agents through cysteine modification; whereas, TRPM2 channel is indirectly activated by production of ADP-ribose. One intriguing property of several TRP channels is susceptibility to both oxidizing and reducing stimuli, suggesting TRP channels could potentially act as a bidirectional sensor for detecting deviations in redox status. In this review, we discuss the unique chemical physiologies of redox sensitive TRP channels and their physiological significance in Ca(2+) signaling.
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Affiliation(s)
- Nozomi Ogawa
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Tatsuki Kurokawa
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Yasuo Mori
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan; Laboratory of Environmental Systems Biology, Department of Technology and Ecology, Hall of Global Environmental Studies, Kyoto University, Kyoto 615-8510, Japan.
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29
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Ogawa N, Kurokawa T, Fujiwara K, Polat OK, Badr H, Takahashi N, Mori Y. Functional and Structural Divergence in Human TRPV1 Channel Subunits by Oxidative Cysteine Modification. J Biol Chem 2016; 291:4197-210. [PMID: 26702055 PMCID: PMC4759194 DOI: 10.1074/jbc.m115.700278] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/17/2015] [Indexed: 11/06/2022] Open
Abstract
Transient receptor potential vanilloid 1 (TRPV1) channel is a tetrameric protein that acts as a sensor for noxious stimuli such as heat and for diverse inflammatory mediators such as oxidative stress to mediate nociception in a subset of sensory neurons. In TRPV1 oxidation sensing, cysteine (Cys) oxidation has been considered as the principle mechanism; however, its biochemical basis remains elusive. Here, we characterize the oxidative status of Cys residues in differential redox environments and propose a model of TRPV1 activation by oxidation. Through employing a combination of non-reducing SDS-PAGE, electrophysiology, and mass spectrometry we have identified the formation of subunit dimers carrying a stable intersubunit disulfide bond between Cys-258 and Cys-742 of human TRPV1 (hTRPV1). C258S and C742S hTRPV1 mutants have a decreased protein half-life, reflecting the role of the intersubunit disulfide bond in supporting channel stability. Interestingly, the C258S hTRPV1 mutant shows an abolished response to oxidants. Mass spectrometric analysis of Cys residues of hTRPV1 treated with hydrogen peroxide shows that Cys-258 is highly sensitive to oxidation. Our results suggest that Cys-258 residues are heterogeneously modified in the hTRPV1 tetrameric complex and comprise Cys-258 with free thiol for oxidation sensing and Cys-258, which is involved in the disulfide bond for assisting subunit dimerization. Thus, the hTRPV1 channel has a heterogeneous subunit composition in terms of both redox status and function.
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Affiliation(s)
- Nozomi Ogawa
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Tatsuki Kurokawa
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Kenji Fujiwara
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Onur Kerem Polat
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Heba Badr
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Nobuaki Takahashi
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, and
| | - Yasuo Mori
- From the Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan, Department of Technology and Ecology, Hall of Global Environmental Studies, Kyoto University, Kyoto 615-8510, Japan
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Lapointe TK, Basso L, Iftinca MC, Flynn R, Chapman K, Dietrich G, Vergnolle N, Altier C. TRPV1 sensitization mediates postinflammatory visceral pain following acute colitis. Am J Physiol Gastrointest Liver Physiol 2015; 309:G87-99. [PMID: 26021808 DOI: 10.1152/ajpgi.00421.2014] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 05/20/2015] [Indexed: 01/31/2023]
Abstract
Quiescent phases of inflammatory bowel disease (IBD) are often accompanied by chronic abdominal pain. Although the transient receptor potential vanilloid 1 (TRPV1) ion channel has been postulated as an important mediator of visceral hypersensitivity, its functional role in postinflammatory pain remains elusive. This study aimed at establishing the role of TRPV1 in the peripheral sensitization underlying chronic visceral pain in the context of colitis. Wild-type and TRPV1-deficient mice were separated into three groups (control, acute colitis, and recovery), and experimental colitis was induced by oral administration of dextran sulfate sodium (DSS). Recovery mice showed increased chemically and mechanically evoked visceral hypersensitivity 5 wk post-DSS discontinuation, at which point inflammation had completely resolved. Significant changes in nonevoked pain-related behaviors could also be observed in these animals, indicative of persistent discomfort. These behavioral changes correlated with elevated colonic levels of substance P (SP) and TRPV1 in recovery mice, thus leading to the hypothesis that SP could sensitize TRPV1 function. In vitro experiments revealed that prolonged exposure to SP could indeed sensitize capsaicin-evoked currents in both cultured neurons and TRPV1-transfected human embryonic kidney (HEK) cells, a mechanism that involved TRPV1 ubiquitination and subsequent accumulation at the plasma membrane. Importantly, although TRPV1-deficient animals experienced similar disease severity and pain as wild-type mice in the acute phase of colitis, TRPV1 deletion prevented the development of postinflammatory visceral hypersensitivity and pain-associated behaviors. Collectively, our results suggest that chronic exposure of colon-innervating primary afferents to SP could sensitize TRPV1 and thus participate in the establishment of persistent abdominal pain following acute inflammation.
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Affiliation(s)
- Tamia K Lapointe
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada
| | - Lilian Basso
- Institut National de la Santé et de la Recherche Medicale (INSERM), Toulouse, France; Le Centre National de la Recherche Scientifique (CNRS), Toulouse, France; and Université de Toulouse III Paul Sabatier, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France
| | - Mircea C Iftinca
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada
| | - Robyn Flynn
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada
| | - Kevin Chapman
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada
| | - Gilles Dietrich
- Institut National de la Santé et de la Recherche Medicale (INSERM), Toulouse, France; Le Centre National de la Recherche Scientifique (CNRS), Toulouse, France; and Université de Toulouse III Paul Sabatier, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France
| | - Nathalie Vergnolle
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada; Institut National de la Santé et de la Recherche Medicale (INSERM), Toulouse, France; Le Centre National de la Recherche Scientifique (CNRS), Toulouse, France; and Université de Toulouse III Paul Sabatier, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France
| | - Christophe Altier
- Department of Physiology and Pharmacology, Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada;
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