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He J, Zuo J, Fan X, Li Z. Electro-acupuncture modulated miR-214 expression to prevent chondrocyte apoptosis and reduce pain by targeting BAX and TRPV4 in osteoarthritis rats. Braz J Med Biol Res 2024; 57:e13238. [PMID: 38808885 PMCID: PMC11136484 DOI: 10.1590/1414-431x2024e13238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 04/15/2024] [Indexed: 05/30/2024] Open
Abstract
Osteoarthritis (OA) is a highly prevalent joint disorder characterized by progressive degeneration of articular cartilage, subchondral bone remodeling, osteophyte formation, synovial inflammation, and meniscal damage. Although the etiology of OA is multifactorial, pro-inflammatory processes appear to play a key role in disease pathogenesis. Previous studies indicate that electroacupuncture (EA) exerts chondroprotective, anti-inflammatory, and analgesic effects in preclinical models of OA, but the mechanisms underlying these potential therapeutic benefits remain incompletely defined. This study aimed to investigate the effects of EA on OA development in a rat model, as well as to explore associated molecular mechanisms modulated by EA treatment. Forty rats were divided into OA, EA, antagomiR-214, and control groups. Following intra-articular injection of monosodium iodoacetate to induce OA, EA and antagomiR-214 groups received daily EA stimulation at acupoints around the knee joint for 21 days. Functional pain behaviors and chondrocyte apoptosis were assessed as outcome measures. The expression of microRNA-214 (miR-214) and its downstream targets involved in apoptosis and nociception, BAX and TRPV4, were examined. Results demonstrated that EA treatment upregulated miR-214 expression in OA knee cartilage. By suppressing pro-apoptotic BAX and pro-nociceptive TRPV4, this EA-induced miR-214 upregulation ameliorated articular pain and prevented chondrocyte apoptosis. These findings suggested that miR-214 plays a key role mediating EA's therapeutic effects in OA pathophysiology, and represents a promising OA treatment target for modulation by acupuncture.
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Affiliation(s)
- Jia He
- Department of Traditional Chinese Medical Orthopedics, Xi'an Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jia Zuo
- Department of Acupuncture, Shaanxi Provincial Hospital of Chinese Medicine, Xi'an, Shaanxi, China
| | - Xiaochen Fan
- Department of Traditional Chinese Medical Orthopedics, Xi'an Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Zhe Li
- Department of Traditional Chinese Medical Orthopedics, Xi'an Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Bekauri T, Fischer S, Honn KV, Maddipati KR, Love T, Little C, Wood RW, Bonham AD, Linder MA, Yule DI, Emanuelle C, Falsetta ML. Inflammation, lipid dysregulation, and transient receptor potential cation channel subfamily V member 4 signaling perpetuate chronic vulvar pain. Pain 2024; 165:820-837. [PMID: 37889581 PMCID: PMC10949218 DOI: 10.1097/j.pain.0000000000003088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/19/2023] [Accepted: 08/23/2023] [Indexed: 10/29/2023]
Abstract
ABSTRACT Localized provoked vulvodynia is characterized by chronic vulvar pain that disrupts every aspect of the patient's life. Pain is localized to the vulvar vestibule, a specialized ring of tissue immediately surrounding the vaginal opening involved in immune defense. In this article, we show inflammation is the critical first step necessary for the generation of pain signals in the vulva. Inflammatory stimuli alone or combined with the transient receptor potential cation channel subfamily V member 4 (TRPV4) agonist 4α-phorbol 12,13-didecanoate stimulate calcium flux into vulvar fibroblast cells. Activity is blocked by the TRPV4 antagonist HC067047, denoting specificity to TRPV4. Using lipidomics, we found pro-resolving lipids in the vulvar vestibule were dysregulated, characterized by a reduction in pro-resolving mediators and heightened production of inflammatory mediators. We demonstrate specialized pro-resolving mediators represent a potential new therapy for vulvar pain, acting on 2 key parts of the disease mechanism by limiting inflammation and acutely inhibiting TRPV4 signaling.
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Affiliation(s)
- Tamari Bekauri
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
| | - Sarah Fischer
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
| | - Kenneth V. Honn
- Pathology Department, Wayne State University, Detroit, MI, United States
- Lipidomics Core Facility and Bioactive Lipids Research Program, Wayne State University, Detroit, MI, United States
| | - Krishna Rao Maddipati
- Pathology Department, Wayne State University, Detroit, MI, United States
- Lipidomics Core Facility and Bioactive Lipids Research Program, Wayne State University, Detroit, MI, United States
| | - Tanzy Love
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, United States
| | - Chantelle Little
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
| | - Ronald W. Wood
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
| | - Adrienne D. Bonham
- OB/GYN Department, Oregon Health Sciences University, Portland, OR, United States
| | - Mitchell A. Linder
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
| | - David I. Yule
- Pharmacology and Physiology Department, University of Rochester, Rochester, NY, United States
| | - Chrysilla Emanuelle
- Pharmacology and Physiology Department, University of Rochester, Rochester, NY, United States
| | - Megan L. Falsetta
- OB/GYN Research Division, University of Rochester, Rochester, NY, United States
- Pharmacology and Physiology Department, University of Rochester, Rochester, NY, United States
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Fialho MFP, Brum ES, Becker G, Oliveira SM. TRPV4 Activation and its Intracellular Modulation Mediated by Kinin Receptors Contribute to Painful Symptoms Induced by Anastrozole. Mol Neurobiol 2024; 61:1627-1642. [PMID: 37740866 DOI: 10.1007/s12035-023-03654-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/12/2023] [Indexed: 09/25/2023]
Abstract
Anastrozole, an aromatase inhibitor, induces painful musculoskeletal symptoms, which affect patients' quality of life and lead to therapy discontinuation. Efforts have been made to understand the mechanisms involved in these painful symptoms to manage them better. In this context, we explored the role of the Transient Receptor Potential Vanilloid 4 (TRPV4), a potential transducer of several nociceptive mechanisms, in anastrozole-induced musculoskeletal pain in mice. Besides, we evaluated the possible sensibilization of TRPV4 by signalling pathways downstream, PLC, PKC and PKCε from kinin B2 (B2R) and B1 (B1R) receptors activation in anastrozole-induced pain. Anastrozole caused mechanical allodynia and muscle strength loss in mice. HC067047, TRPV4 antagonist, reduced the anastrozole-induced mechanical allodynia and muscle strength loss. In animals previously treated with anastrozole, the local administration of sub-nociceptive doses of the TRPV4 (4α-PDD or hypotonic solution), B2R (Bradykinin) or B1R (DABk) agonists enhanced the anastrozole-induced pain behaviours. The sensitizing effects induced by local injection of the TRPV4, B2R and B1R agonists in animals previously treated with anastrozole were reduced by pre-treatment with TRPV4 antagonist. Furthermore, inhibition of PLC, PKC or PKCε attenuated the mechanical allodynia and muscle strength loss induced by TRPV4, B2R and B1R agonists. The generation of painful conditions caused by anastrozole depends on direct TRPV4 activation or indirect, e.g., PLC, PKC and PKCε pathways downstream from B2R and B1R activation. Thus, the TRPV4 channels act as sensors of extracellular and intracellular changes, making them potential therapeutic targets for alleviating pain related to aromatase inhibitors use, such as anastrozole.
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Affiliation(s)
- Maria Fernanda Pessano Fialho
- Graduate Program in Biological Sciences: Toxicological Biochemistry, Centre of Natural and Exact Sciences, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Evelyne Silva Brum
- Graduate Program in Biological Sciences: Toxicological Biochemistry, Centre of Natural and Exact Sciences, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Gabriela Becker
- Graduate Program in Biological Sciences: Toxicological Biochemistry, Centre of Natural and Exact Sciences, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Sara Marchesan Oliveira
- Graduate Program in Biological Sciences: Toxicological Biochemistry, Centre of Natural and Exact Sciences, Federal University of Santa Maria, Santa Maria, RS, Brazil.
- Department of Biochemistry and Molecular Biology, Centre of Natural and Exact Sciences, Federal University of Santa Maria, Camobi, Santa Maria, RS, 97105-900, Brazil.
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Fukazawa A, Hori A, Hotta N, Katanosaka K, Estrada JA, Ishizawa R, Kim HK, Iwamoto GA, Smith SA, Vongpatanasin W, Mizuno M. Antagonism of TRPV4 channels partially reduces mechanotransduction in rat skeletal muscle afferents. J Physiol 2023; 601:1407-1424. [PMID: 36869605 PMCID: PMC10106437 DOI: 10.1113/jp284026] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 03/02/2023] [Indexed: 03/05/2023] Open
Abstract
Mechanical distortion of working skeletal muscle induces sympathoexcitation via thin fibre afferents, a reflex response known as the skeletal muscle mechanoreflex. However, to date, the receptor ion channels responsible for mechanotransduction in skeletal muscle remain largely undetermined. Transient receptor potential vanilloid 4 (TRPV4) is known to sense mechanical stimuli such as shear stress or osmotic pressure in various organs. It is hypothesized that TRPV4 in thin-fibre primary afferents innervating skeletal muscle is involved in mechanotransduction. Fluorescence immunostaining revealed that 20.1 ± 10.1% of TRPV4 positive neurons were small dorsal root ganglion (DRG) neurons that were DiI-labelled, and among them 9.5 ± 6.1% of TRPV4 co-localized with the C-fibre marker peripherin. In vitro whole-cell patch clamp recordings from cultured rat DRG neurons demonstrated that mechanically activated current amplitude was significantly attenuated after the application of the TRPV4 antagonist HC067047 compared to control (P = 0.004). Such reductions were also observed in single-fibre recordings from a muscle-nerve ex vivo preparation where HC067047 significantly decreased afferent discharge to mechanical stimulation (P = 0.007). Likewise, in an in vivo decerebrate rat preparation, the renal sympathetic nerve activity (RSNA) and mean arterial pressure (MAP) responses to passive stretch of hindlimb muscle were significantly reduced by intra-arterial injection of HC067047 (ΔRSNA: P = 0.019, ΔMAP: P = 0.002). The findings suggest that TRPV4 plays an important role in mechanotransduction contributing to the cardiovascular responses evoked by the skeletal muscle mechanoreflex during exercise. KEY POINTS: Although a mechanical stimulus to skeletal muscle reflexively activates the sympathetic nervous system, the receptors responsible for mechanotransduction in skeletal muscle thin fibre afferents have not been fully identified. Evidence suggests that TRPV4 is a mechanosensitive channel that plays an important role in mechanotransduction within various organs. Immunocytochemical staining demonstrates that TRPV4 is expressed in group IV skeletal muscle afferents. In addition, we show that the TRPV4 antagonist HC067047 decreases the responsiveness of thin fibre afferents to mechanical stimulation at the muscle tissue level as well as at the level of dorsal root ganglion neurons. Moreover, we demonstrate that intra-arterial HC067047 injection attenuates the sympathetic and pressor responses to passive muscle stretch in decerebrate rats. These data suggest that antagonism of TRPV4 attenuates mechanotransduction in skeletal muscle afferents. The present study demonstrates a probable physiological role for TRPV4 in the regulation of mechanical sensation in somatosensory thin fibre muscle afferents.
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Affiliation(s)
- Ayumi Fukazawa
- Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Amane Hori
- Graduate School of Life and Health Sciences, Chubu University, Kasugai 487-850, Japan
- Japan Society for the Promotion of Science, Tokyo 102-8472, Japan
| | - Norio Hotta
- Graduate School of Life and Health Sciences, Chubu University, Kasugai 487-850, Japan
- College of Life and Health Sciences, Chubu University, Kasugai 487-850, Japan
| | - Kimiaki Katanosaka
- Graduate School of Life and Health Sciences, Chubu University, Kasugai 487-850, Japan
- College of Life and Health Sciences, Chubu University, Kasugai 487-850, Japan
| | - Juan A. Estrada
- Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Rie Ishizawa
- Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Han-Kyul Kim
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Gary A. Iwamoto
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Scott A. Smith
- Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Wanpen Vongpatanasin
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Masaki Mizuno
- Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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Guarise C, Tessari M, Pavan M, Pluda S, Lucia AD, Barbera C, Galesso D. Hydrophobic derivatives of sulfated hyaluronic acid as drug delivery systems for multi-target intra-articular treatment of post-traumatic osteoarthritis. J Pharm Sci 2022; 111:2505-2513. [DOI: 10.1016/j.xphs.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 04/06/2022] [Accepted: 04/06/2022] [Indexed: 11/29/2022]
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The Emerging Pro-Algesic Profile of Transient Receptor Potential Vanilloid Type 4. Rev Physiol Biochem Pharmacol 2022; 186:57-93. [PMID: 36378366 DOI: 10.1007/112_2022_75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transient receptor potential vanilloid type 4 (TRPV4) channels are Ca2+-permeable non-selective cation channels which mediate a wide range of physiological functions and are activated and modulated by a diverse array of stimuli. One of this ion channel's least discussed functions is in relation to the generation and maintenance of certain pain sensations. However, in the two decades which have elapsed since the identification of this ion channel, considerable data has emerged concerning its function in mediating pain sensations. TRPV4 is a mediator of mechanical hyperalgesia in the various contexts in which a mechanical stimulus, comprising trauma (at the macro-level) or discrete extracellular pressure or stress (at the micro-level), results in pain. TRPV4 is also recognised as constituting an essential component in mediating inflammatory pain. It also plays a role in relation to many forms of neuropathic-type pain, where it functions in mediating mechanical allodynia and hyperalgesia.Here, we review the role of TRPV4 in mediating pain sensations.
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Zhang K, Wang L, Liu Z, Geng B, Teng Y, Liu X, Yi Q, Yu D, Chen X, Zhao D, Xia Y. Mechanosensory and mechanotransductive processes mediated by ion channels in articular chondrocytes: Potential therapeutic targets for osteoarthritis. Channels (Austin) 2021; 15:339-359. [PMID: 33775217 PMCID: PMC8018402 DOI: 10.1080/19336950.2021.1903184] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 02/06/2023] Open
Abstract
Articular cartilage consists of an extracellular matrix including many proteins as well as embedded chondrocytes. Articular cartilage formation and function are influenced by mechanical forces. Hind limb unloading or simulated microgravity causes articular cartilage loss, suggesting the importance of the healthy mechanical environment in articular cartilage homeostasis and implying a significant role of appropriate mechanical stimulation in articular cartilage degeneration. Mechanosensitive ion channels participate in regulating the metabolism of articular chondrocytes, including matrix protein production and extracellular matrix synthesis. Mechanical stimuli, including fluid shear stress, stretch, compression and cell swelling and decreased mechanical conditions (such as simulated microgravity) can alter the membrane potential and regulate the metabolism of articular chondrocytes via transmembrane ion channel-induced ionic fluxes. This process includes Ca2+ influx and the resulting mobilization of Ca2+ that is due to massive released Ca2+ from stores, intracellular cation efflux and extracellular cation influx. This review brings together published information on mechanosensitive ion channels, such as stretch-activated channels (SACs), voltage-gated Ca2+ channels (VGCCs), large conductance Ca2+-activated K+ channels (BKCa channels), Ca2+-activated K+ channels (SKCa channels), voltage-activated H+ channels (VAHCs), acid sensing ion channels (ASICs), transient receptor potential (TRP) family channels, and piezo1/2 channels. Data based on epithelial sodium channels (ENaCs), purinergic receptors and N-methyl-d-aspartate (NMDA) receptors are also included. These channels mediate mechanoelectrical physiological processes essential for converting physical force signals into biological signals. The primary channel-mediated effects and signaling pathways regulated by these mechanosensitive ion channels can influence the progression of osteoarthritis during the mechanosensory and mechanoadaptive process of articular chondrocytes.
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Affiliation(s)
- Kun Zhang
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Lifu Wang
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Zhongcheng Liu
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Bin Geng
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Yuanjun Teng
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Xuening Liu
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Qiong Yi
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Dechen Yu
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Xiangyi Chen
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Dacheng Zhao
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
| | - Yayi Xia
- Department of Orthopedics, Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou Gansu, China
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Janczi T, Meier F, Fehrl Y, Kinne RW, Böhm B, Burkhardt H. A Novel Pro-Inflammatory Mechanosensing Pathway Orchestrated by the Disintegrin Metalloproteinase ADAM15 in Synovial Fibroblasts. Cells 2021; 10:cells10102705. [PMID: 34685689 PMCID: PMC8534551 DOI: 10.3390/cells10102705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022] Open
Abstract
Mechanotransduction is elicited in cells upon the perception of physical forces transmitted via the extracellular matrix in their surroundings and results in signaling events that impact cellular functions. This physiological process is a prerequisite for maintaining the integrity of diarthrodial joints, while excessive loading is a factor promoting the inflammatory mechanisms of joint destruction. Here, we describe a mechanotransduction pathway in synovial fibroblasts (SF) derived from the synovial membrane of inflamed joints. The functionality of this pathway is completely lost in the absence of the disintegrin metalloproteinase ADAM15 strongly upregulated in SF. The mechanosignaling events involve the Ca2+-dependent activation of c-Jun-N-terminal kinases, the subsequent downregulation of long noncoding RNA HOTAIR, and upregulation of the metabolic energy sensor sirtuin-1. This afferent loop of the pathway is facilitated by ADAM15 via promoting the cell membrane density of the constitutively cycling mechanosensitive transient receptor potential vanilloid 4 calcium channels. In addition, ADAM15 reinforces the Src-mediated activation of pannexin-1 channels required for the enhanced release of ATP, a mediator of purinergic inflammation, which is increasingly produced upon sirtuin-1 induction.
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Affiliation(s)
- Tomasz Janczi
- Division of Rheumatology, University Hospital Frankfurt, Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany; (T.J.); (F.M.); (Y.F.)
| | - Florian Meier
- Division of Rheumatology, University Hospital Frankfurt, Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany; (T.J.); (F.M.); (Y.F.)
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, 60590 Frankfurt am Main, Germany
| | - Yuliya Fehrl
- Division of Rheumatology, University Hospital Frankfurt, Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany; (T.J.); (F.M.); (Y.F.)
| | - Raimund W. Kinne
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, 07607 Eisenberg, Germany;
| | - Beate Böhm
- Division of Rheumatology, University Hospital Frankfurt, Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany; (T.J.); (F.M.); (Y.F.)
- Correspondence: (B.B.); (H.B.)
| | - Harald Burkhardt
- Division of Rheumatology, University Hospital Frankfurt, Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany; (T.J.); (F.M.); (Y.F.)
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, 60590 Frankfurt am Main, Germany
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60590 Frankfurt am Main, Germany
- Correspondence: (B.B.); (H.B.)
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Singh R, Adhya P, Sharma SS. Redox-sensitive TRP channels: a promising pharmacological target in chemotherapy-induced peripheral neuropathy. Expert Opin Ther Targets 2021; 25:529-545. [PMID: 34289785 DOI: 10.1080/14728222.2021.1956464] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Chemotherapy-induced peripheral neuropathy (CIPN) and its related pain is a major side effect of certain chemotherapeutic agents used in cancer treatment. Available analgesics are mostly symptomatic, and on prolonged treatment, patients become refractive to them. Hence, the development of improved therapeutics that act on novel therapeutic targets is necessary. Potential targets include the redox-sensitive TRP channels [e.g. TRPA1, TRPC5, TRPC6, TRPM2, TRPM8, TRPV1, TRPV2, and TRPV4] which are activated under oxidative stress associated with CIPN. AREAS COVERED We have examined numerous neuropathy-inducing cancer chemotherapeutics and their pathophysiological mechanisms. Oxidative stress and its downstream targets, the redox-sensitive TRP channels, together with their potential pharmacological modulators, are discussed. Finally, we reflect upon the barriers to getting new therapeutic approaches into the clinic. The literature search was conducted in PubMed upto and including April 2021. EXPERT OPINION Redox-sensitive TRP channels are a promising target in CIPN. Pharmacological modulators of these channels have reduced pain in preclinical models and in clinical studies. Clinical scrutiny suggests that TRPA1, TRPM8, and TRPV1 are the most promising targets because of their pain-relieving potential. In addition to the analgesic effect, TRPV1 agonist-Capsaicin possesses a disease-modifying effect in CIPN through its restorative property in damaged sensory nerves.
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Affiliation(s)
- Ramandeep Singh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
| | - Pratik Adhya
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
| | - Shyam Sunder Sharma
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Mohali, Punjab, India
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Werland F, de Col R, Hirth M, Turnquist B, Schmelz M, Obreja O. Mechanical sensitization, increased axonal excitability, and spontaneous activity in C-nociceptors after ultraviolet B irradiation in pig skin. Pain 2021; 162:2002-2013. [PMID: 33449511 DOI: 10.1097/j.pain.0000000000002197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/30/2020] [Indexed: 11/26/2022]
Abstract
ABSTRACT Ultraviolet B (UVB) irradiation induces hyperalgesia in human and animal pain models. We investigated mechanical sensitization, increase in axonal excitability, and spontaneous activity in different C-nociceptor classes after UVB in pig skin. We focused on units with receptive fields covering both irradiated and nonirradiated skin allowing intraindividual comparisons. Thirty-five pigs were irradiated in a chessboard pattern, and extracellular single-fibre recordings were obtained 10 to 28 hours later (152 fibers). Units from the contralateral hind limb served as a control (n = 112). Irradiated and nonirradiated parts of the same innervation territory were compared in 36 neurons; low threshold C-touch fibers (n = 10) and sympathetic efferents (n = 2) were unchanged, but lower mechanical thresholds and higher discharge frequency at threshold were found in mechanosensitive nociceptors (n = 12). Half of them could be activated with nonnoxious brush stimuli in the sunburn. Four of 12 mechanoinsensitive nociceptors were found sensitized to mechanical stimulation in the irradiated part of the receptive field. Activity-dependent slowing of conduction was reduced in the irradiated and in the nonirradiated skin as compared with the control leg, whereas increased ability to follow high stimulation frequencies was restricted to the sunburn (108.5 ± 37 Hz UVB vs 6.3 ± 1 Hz control). Spontaneous activity was more frequent in the sunburn (72/152 vs 31/112). Mechanical sensitization of primary nociceptors and higher maximum after frequency are suggested to contribute to primary hyperalgesia, whereas the spontaneous activity of silent nociceptors might offer a mechanistic link contributing to ongoing pain and facilitated induction of spinal sensitization.
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Affiliation(s)
- Fiona Werland
- Department of Experimental Pain Research, MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Roberto de Col
- Department of Experimental Pain Research, MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Michael Hirth
- Department of Experimental Pain Research, MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Brian Turnquist
- Department of Mathematics and Computer Science, Bethel University, Saint Paul, MI, United States . Dr. Obreja is now with the Klinik für Rheumatologie und Schmerzmedizin, Bethesda Spital Basel, Basel, Switzerland
| | - Martin Schmelz
- Department of Experimental Pain Research, MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Otilia Obreja
- Department of Experimental Pain Research, MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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11
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Abstract
Mechanosensing is a key feature through which organisms can receive inputs from the environment and convert them into specific functional and behavioral outputs. Mechanosensation occurs in many cells and tissues, regulating a plethora of molecular processes based on the distribution of forces and stresses both at the cell membrane and at the intracellular organelles levels, through complex interactions between cells’ microstructures, cytoskeleton, and extracellular matrix. Although several primary and secondary mechanisms have been shown to contribute to mechanosensation, a fundamental pathway in simple organisms and mammals involves the presence of specialized sensory neurons and the presence of different types of mechanosensitive ion channels on the neuronal cell membrane. In this contribution, we present a review of the main ion channels which have been proven to be significantly involved in mechanotransduction in neurons. Further, we discuss recent studies focused on the biological mechanisms and modeling of mechanosensitive ion channels’ gating, and on mechanotransduction modeling at different scales and levels of details.
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12
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Oxytocin-Dependent Regulation of TRPs Expression in Trigeminal Ganglion Neurons Attenuates Orofacial Neuropathic Pain Following Infraorbital Nerve Injury in Rats. Int J Mol Sci 2020; 21:ijms21239173. [PMID: 33271955 PMCID: PMC7731199 DOI: 10.3390/ijms21239173] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 11/28/2020] [Accepted: 11/28/2020] [Indexed: 12/12/2022] Open
Abstract
We evaluated the mechanisms underlying the oxytocin (OXT)-induced analgesic effect on orofacial neuropathic pain following infraorbital nerve injury (IONI). IONI was established through tight ligation of one-third of the infraorbital nerve thickness. Subsequently, the head withdrawal threshold for mechanical stimulation (MHWT) of the whisker pad skin was measured using a von Frey filament. Trigeminal ganglion (TG) neurons innervating the whisker pad skin were identified using a retrograde labeling technique. OXT receptor-immunoreactive (IR), transient receptor potential vanilloid 1 (TRPV1)-IR, and TRPV4-IR TG neurons innervating the whisker pad skin were examined on post-IONI day 5. The MHWT remarkably decreased from post-IONI day 1 onward. OXT application to the nerve-injured site attenuated the decrease in MHWT from day 5 onward. TRPV1 or TRPV4 antagonism significantly suppressed the decrement of MHWT following IONI. OXT receptors were expressed in the uninjured and Fluoro-Gold (FG)-labeled TG neurons. Furthermore, there was an increase in the number of FG-labeled TRPV1-IR and TRPV4-IR TG neurons, which was inhibited by administering OXT. This inhibition was suppressed by co-administration with an OXT receptor antagonist. These findings suggest that OXT application inhibits the increase in TRPV1-IR and TRPV4-IR TG neurons innervating the whisker pad skin, which attenuates post-IONI orofacial mechanical allodynia.
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Eitner A, Richter F, Schaible HG. Physiologie der Schmerzentstehung in der Peripherie. AKTUEL RHEUMATOL 2020. [DOI: 10.1055/a-1203-1192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
ZusammenfassungDieser Beitrag gibt einen Überblick über den Kenntnisstand zu den
Mechanismen der Schmerzentstehung im Gelenk. Er fokussiert sich auf den Vorgang
der Nozizeption in nozizeptiven Nervenfasern des Gelenks und stellt dar, wie
Krankheitsprozesse im Gelenk auf Nozizeptoren wirken. Während
Nozizeptoren im normalen Gelenk eine hohe Erregungsschwelle besitzen und nur
durch hochintensive Reize aktiviert werden, kommt es bei Gelenkerkrankungen
häufig zu einer Sensibilisierung dieser Nervenfasern, sodass sie bereits
auf leichte Reize (Bewegungen, Palpation) ansprechen und nach zentraler
Verarbeitung Schmerzempfindungen auslösen. Eine Sensibilisierung wird
meistens durch Entzündungsmediatoren ausgelöst, für die
die Nozizeptoren Rezeptoren besitzen. Werden Nervenfasern im Erkrankungsprozess
geschädigt, können neuropathische Schmerzmechanismen
hinzukommen. Chronische Gelenkerkrankungen sind durch entzündliche und
destruktive Prozesse charakterisiert. Sowohl bei primären Arthritiden
als auch bei Arthrosen sind entzündliche Prozesse für die
Sensibilisierung der Nozizeptoren verantwortlich. Dafür werden neben den
Prostaglandinen auch proinflammatorische Zytokine und der Nervenwachstumsfaktor
(NGF) verantwortlich gemacht, für die viele Nozizeptoren Rezeptoren
exprimieren. Demgemäß sind diese Moleküle auch Target
innovativer Schmerztherapien, z. B. die Gabe von Antikörpern
gegen NGF bei Arthrose. Besonders für die Neutralisation von TNF ist ein
direkt schmerzlindernder Effekt nachgewiesen, der aus der Unterbrechung von
nozizeptiven Vorgängen am Nozizeptor resultiert. Der direkte
pronozizeptive Effekt der Zytokine und Bindungsstellen für Fc-Fragmente
von Antikörpern an Nozizeptoren zeigen, dass Immunmechanismen auch
für die Schmerzentstehung große Bedeutung haben. Auch
destruktive Gelenkprozesse können Schmerzen verursachen. So kann bereits
die Osteoklastenaktivität im präklinischen Stadium einer
Arthritis Schmerzen verursachen, und nach Ausbruch der Arthritis tragen
Destruktionsprozesse zu Schmerzen bei. Inwieweit die Hemmung der
Osteoklastenaktivität Gelenkschmerzen lindert, wird derzeit erforscht.
Auch weitere neue Ansätze, peripher wirksame Opioide, Cannabinoide und
Ionenkanalblocker werden dargestellt. Schließlich geht der Beitrag auf
generelle/systemische Faktoren ein, die Krankheitsprozesse im Gelenk und
die Schmerzentstehung beeinflussen. Hier wird in erster Linie die Bedeutung des
Diabetes mellitus angesprochen. Diese Stoffwechselerkrankung stellt einen
Risikofaktor für die Entwicklung von Arthrosen dar, und sie
trägt zur Schmerzintensivierung bei. Dabei können
verstärkte Entzündungsprozesse und auch neuropathische
Schmerzkomponenten beteiligt sein.
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Affiliation(s)
- Annett Eitner
- Klinik für Unfall-, Hand-, Wiederherstellungschirurgie,
Universitätsklinikum Jena, Jena
| | - Frank Richter
- Institut für Physiologie 1, Universitätsklinikum Jena,
Jena
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Roh J, Hwang SM, Lee SH, Lee K, Kim YH, Park CK. Functional Expression of Piezo1 in Dorsal Root Ganglion (DRG) Neurons. Int J Mol Sci 2020; 21:ijms21113834. [PMID: 32481599 PMCID: PMC7313462 DOI: 10.3390/ijms21113834] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/25/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022] Open
Abstract
Piezo channels are mechanosensitive ion channels. Piezo1 is primarily expressed in nonsensory tissues, whereas Piezo2 is predominantly found in sensory tissues, including dorsal root ganglion (DRG) neurons. However, a recent study demonstrated the intracellular calcium response to Yoda1, a selective Piezo1 agonist, in trigeminal ganglion (TG) neurons. Herein, we investigate the expression of Piezo1 mRNA and protein in mouse and human DRG neurons and the activation of Piezo1 via calcium influx by Yoda1. Yoda1 induces inward currents mainly in small- (< 25 μm) and medium-sized (25-35 μm) mouse DRG neurons. The Yoda1-induced Ca2+ response is inhibited by cationic channel blocker, ruthenium red and cationic mechanosensitive channel blocker, GsMTx4. To confirm the specific inhibition of Piezo1, we performed an adeno-associated virus serotype 2/5 (AAV2/5)-mediated delivery of short hairpin RNA (shRNA) into mouse DRG neurons. AAV2/5 transfection downregulates piezo1 mRNA expression and reduces Ca2+ response by Yoda1. Piezo1 also shows physiological functions with transient receptor potential vanilloid 1 (TRPV1) in the same DRG neurons and is regulated by the activation of TRPV1 in mouse DRG sensory neurons. Overall, we found that Piezo1 has physiological functions in DRG neurons and that TRPV1 activation inhibits an inward current induced by Yoda1.
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Affiliation(s)
- Jueun Roh
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Sung-Min Hwang
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Sun-Ho Lee
- Department of Neurosurgery, Spine tumor center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 06351, Korea;
| | - Kihwan Lee
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Yong Ho Kim
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
- Correspondence: (Y.H.K.); (C.-K.P.); Tel.: +82-32-899-6691 (Y.H.K.); +82-32-899-6692 (C.-K.P.)
| | - Chul-Kyu Park
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
- Correspondence: (Y.H.K.); (C.-K.P.); Tel.: +82-32-899-6691 (Y.H.K.); +82-32-899-6692 (C.-K.P.)
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Increase in IGF-1 Expression in the Injured Infraorbital Nerve and Possible Implications for Orofacial Neuropathic Pain. Int J Mol Sci 2019; 20:ijms20246360. [PMID: 31861182 PMCID: PMC6940743 DOI: 10.3390/ijms20246360] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 12/18/2022] Open
Abstract
Insulin-like growth factor-1 (IGF-1) is upregulated in the injured peripheral nerve bundle and controls nociceptive neuronal excitability associated with peripheral nerve injury. Here, we examined the involvement of IGF-1 signaling in orofacial neuropathic pain following infraorbital nerve injury (IONI) in rats. IONI promoted macrophage accumulation in the injured ION, as well as in the ipsilateral trigeminal ganglion (TG), and induced mechanical allodynia of the whisker pad skin together with the enhancement of neuronal activities in the subnucleus caudalis of the spinal trigeminal nucleus and in the upper cervical spinal cord. The levels of IGF-1 released by infiltrating macrophages into the injured ION and the TG were significantly increased. The IONI-induced the number of transient receptor potential vanilloid (TRPV) subfamily type 4 (TRPV4) upregulation in TRPV subfamily type 2 (TRPV2)-positive small-sized, and medium-sized TG neurons were inhibited by peripheral TRPV2 antagonism. Furthermore, the IONI-induced mechanical allodynia was suppressed by TRPV4 antagonism in the whisker pad skin. These results suggest that IGF-1 released by macrophages accumulating in the injured ION binds to TRPV2, which increases TRPV4 expression in TG neurons innervating the whisker pad skin, ultimately resulting in mechanical allodynia of the whisker pad skin.
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