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Fan J, Guo C, Liao D, Ke H, Lei J, Xie W, Tang Y, Tominaga M, Huang Z, Lei X. Structural Pharmacology of TRPV4 Antagonists. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401583. [PMID: 38659239 PMCID: PMC11220649 DOI: 10.1002/advs.202401583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/21/2024] [Indexed: 04/26/2024]
Abstract
The nonselective calcium-permeable Transient Receptor Potential Cation Channel Subfamily V Member4 (TRPV4) channel regulates various physiological activities. Dysfunction of TRPV4 is linked to many severe diseases, including edema, pain, gastrointestinal disorders, lung diseases, and inherited neurodegeneration. Emerging TRPV4 antagonists show potential clinical benefits. However, the molecular mechanisms of TRPV4 antagonism remain poorly understood. Here, cryo-electron microscopy (cryo-EM) structures of human TRPV4 are presented in-complex with two potent antagonists, revealing the detailed binding pockets and regulatory mechanisms of TRPV4 gating. Both antagonists bind to the voltage-sensing-like domain (VSLD) and stabilize the channel in closed states. These two antagonists induce TRPV4 to undergo an apparent fourfold to twofold symmetry transition. Moreover, it is demonstrated that one of the antagonists binds to the VSLD extended pocket, which differs from the canonical VSLD pocket. Complemented with functional and molecular dynamics simulation results, this study provides crucial mechanistic insights into TRPV4 regulation by small-molecule antagonists, which may facilitate future drug discovery targeting TRPV4.
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Affiliation(s)
- Junping Fan
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking‐Tsinghua Center for Life SciencesPeking UniversityBeijing100871China
| | - Chang Guo
- State Key Laboratory of Natural and Biomimetic DrugsDepartment of Molecular and Cellular PharmacologySchool of Pharmaceutical SciencesPeking University Health Science CenterBeijing100191China
| | | | - Han Ke
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking‐Tsinghua Center for Life SciencesPeking UniversityBeijing100871China
| | - Jing Lei
- Division of Cell SignalingNational Institute for Physiological SciencesThermal Biology GroupExploratory Research Center on Life and Living SystemsNational Institutes of Natural SciencesOkazaki444‐8787Japan
| | - Wenjun Xie
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking‐Tsinghua Center for Life SciencesPeking UniversityBeijing100871China
| | - Yuliang Tang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking‐Tsinghua Center for Life SciencesPeking UniversityBeijing100871China
| | - Makoto Tominaga
- Division of Cell SignalingNational Institute for Physiological SciencesThermal Biology GroupExploratory Research Center on Life and Living SystemsNational Institutes of Natural SciencesOkazaki444‐8787Japan
- Nagoya Advanced Research and Developmet CenterNagoya City UniversityNagoya467‐8601Japan
| | - Zhuo Huang
- State Key Laboratory of Natural and Biomimetic DrugsDepartment of Molecular and Cellular PharmacologySchool of Pharmaceutical SciencesPeking University Health Science CenterBeijing100191China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking‐Tsinghua Center for Life SciencesPeking UniversityBeijing100871China
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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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DuToit J, Brothers P, Stephens M, Keane K, de Jesus FN, Roizes S, von der Weid PY. Flow-dependent regulation of rat mesenteric lymphatic vessel contractile response requires activation of endothelial TRPV4 channels. Microcirculation 2024; 31:e12839. [PMID: 38044795 DOI: 10.1111/micc.12839] [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: 07/20/2023] [Revised: 11/06/2023] [Accepted: 11/22/2023] [Indexed: 12/05/2023]
Abstract
OBJECTIVES The objective of our study is to evaluate the involvement of the transient receptor potential vanilloid 4 (TRPV4) in the alteration of lymphatic pumping in response to flow and determine the signaling pathways involved. METHODS We used immunofluorescence imaging and western blotting to assess TRPV4 expression in rat mesenteric lymphatic vessels. We examined inhibition of TRPV4 with HC067047, nitric oxide synthase (NOS) with L-NNA and cyclooxygenases (COXs) with indomethacin on the contractile response of pressurized lymphatic vessels to flow changes induced by a stepwise increase in pressure gradients, and the functionality of endothelial TRPV4 channels by measuring the intracellular Ca2+ response of primary lymphatic endothelial cell cultures to the selective agonist GSK1016790A. RESULTS TRPV4 protein was expressed in both the endothelial and the smooth muscle layer of rat mesenteric lymphatics with high endothelial expression around the valve sites. When maintained under constant transmural pressure, most lymphatic vessels displayed a decrease in contraction frequency under conditions of flow and this effect was ablated through inhibition of NOS, COX or TRPV4. CONCLUSIONS Our findings demonstrate a critical role for TRPV4 in the decrease in contraction frequency induced in lymphatic vessels by increases in flow rate via the production and action of nitric oxide and dilatory prostanoids.
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Affiliation(s)
- Jacques DuToit
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Peter Brothers
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Matthew Stephens
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Keith Keane
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Flavia Neto de Jesus
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Simon Roizes
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Pierre-Yves von der Weid
- Inflammation Research Network, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Dewaker V, Sharma AR, Debnath U, Park ST, Kim HS. Insights from molecular dynamics simulations of TRPV1 channel modulators in pain. Drug Discov Today 2023; 28:103798. [PMID: 37838068 DOI: 10.1016/j.drudis.2023.103798] [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: 07/28/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 10/16/2023]
Abstract
TRPV1 is a nonselective cation channel vital for detecting noxious stimuli (heat, acid, capsaicin). Its role in pain makes it a potential drug target for chronic pain management, migraines, and related disorders. This review updates molecular dynamics (MD) simulation studies on the TRPV1 channel, focusing on its gating mechanism, ligand-binding sites, and implications for drug design. The article also explores challenges in developing modulators, SAR optimization, and clinical trial studies. Efforts have been undertaken to concisely present MD simulation findings, with a focus on their relevance to drug discovery.
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Affiliation(s)
- Varun Dewaker
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Ashish R Sharma
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Utsab Debnath
- School of Health Sciences & Technology, UPES, Dehradun, Uttarakhand 248007, India
| | - Sung Taek Park
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea; Department of Obstetrics and Gynecology, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 07441, Republic of Korea; EIONCELL Inc., Chuncheon 24252, Republic of Korea
| | - Hyeong Su Kim
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea; Division of Hemato-Oncology, Department of Internal Medicine, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 07441, Republic of Korea; EIONCELL Inc., Chuncheon 24252, Republic of Korea.
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Falsetta ML, Maddipati KR, Honn KV. Inflammation, lipids, and pain in vulvar disease. Pharmacol Ther 2023; 248:108467. [PMID: 37285943 PMCID: PMC10527276 DOI: 10.1016/j.pharmthera.2023.108467] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/09/2023]
Abstract
Localized provoked vulvodynia (LPV) affects ∼14 million people in the US (9% of women), destroying lives and relationships. LPV is characterized by chronic pain (>3 months) upon touch to the vulvar vestibule, which surrounds the vaginal opening. Many patients go months or years without a diagnosis. Once diagnosed, the treatments available only manage the symptoms of disease and do not correct the underlying problem. We have focused on elucidating the underlying mechanisms of chronic vulvar pain to speed diagnosis and improve intervention and management. We determined the inflammatory response to microorganisms, even members of the resident microflora, sets off a chain of events that culminates in chronic pain. This agrees with findings from several other groups, which show inflammation is altered in the painful vestibule. The vestibule of patients is acutely sensitive to inflammatory stimuli to the point of being deleterious. Rather than protect against vaginal infection, it causes heightened inflammation that does not resolve, which coincides with alterations in lipid metabolism that favor production of proinflammatory lipids and not pro-resolving lipids. Lipid dysbiosis in turn triggers pain signaling through the transient receptor potential vanilloid subtype 4 receptor (TRPV4). Treatment with specialized pro-resolving mediators (SPMs) that foster resolution reduces inflammation in fibroblasts and mice and vulvar sensitivity in mice. SPMs, specifically maresin 1, act on more than one part of the vulvodynia mechanism by limiting inflammation and acutely inhibiting TRPV4 signaling. Therefore, SPMs or other agents that target inflammation and/or TRPV4 signaling could prove effective as new vulvodynia therapies.
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Affiliation(s)
- Megan L Falsetta
- University of Rochester, OB/GYN Research Division, Rochester, NY, United States of America; University of Rochester, Pharmacology and Physiology Department, Rochester, NY, United States of America.
| | - Krishna Rao Maddipati
- Wayne State University, Pathology Department, Detroit, MI, United States of America; Wayne State University, Lipidomics Core Facility and Bioactive Lipids Research Program, Detroit, MI, United States of America
| | - Kenneth V Honn
- Wayne State University, Pathology Department, Detroit, MI, United States of America; Wayne State University, Lipidomics Core Facility and Bioactive Lipids Research Program, Detroit, MI, United States of America
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Blazer-Yost BL. Consideration of Kinase Inhibitors for the Treatment of Hydrocephalus. Int J Mol Sci 2023; 24:ijms24076673. [PMID: 37047646 PMCID: PMC10094860 DOI: 10.3390/ijms24076673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/07/2023] Open
Abstract
Hydrocephalus is a devastating condition characterized by excess cerebrospinal fluid (CSF) in the brain. Currently, the only effective treatment is surgical intervention, usually involving shunt placement, a procedure prone to malfunction, blockage, and infection that requires additional, often repetitive, surgeries. There are no long-term pharmaceutical treatments for hydrocephalus. To initiate an intelligent drug design, it is necessary to understand the biochemical changes underlying the pathology of this chronic condition. One potential commonality in the various forms of hydrocephalus is an imbalance in fluid–electrolyte homeostasis. The choroid plexus, a complex tissue found in the brain ventricles, is one of the most secretory tissues in the body, producing approximately 500 mL of CSF per day in an adult human. In this manuscript, two key transport proteins of the choroid plexus epithelial cells, transient receptor potential vanilloid 4 and sodium, potassium, 2 chloride co-transporter 1, will be considered. Both appear to play key roles in CSF production, and their inhibition or genetic manipulation has been shown to affect CSF volume. As with most transporters, these proteins are regulated by kinases. Therefore, specific kinase inhibitors are also potential targets for the development of pharmaceuticals to treat hydrocephalus.
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Affiliation(s)
- Bonnie L. Blazer-Yost
- Biology Department, Indiana University—Purdue University, 723 West Michigan Street, Indianapolis, IN 46202, USA
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7
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Ritzmann D, Jahn M, Heck S, Jung C, Cesetti T, Couturier N, Rudolf R, Reuscher N, Buerger C, Rauh O, Fauth T. The Ca 2+ channel TRPV4 is dispensable for Ca 2+ influx and cell volume regulation during hypotonic stress response in human keratinocyte cell lines. Cell Calcium 2023; 111:102715. [PMID: 36933289 DOI: 10.1016/j.ceca.2023.102715] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/02/2023] [Accepted: 03/09/2023] [Indexed: 03/13/2023]
Abstract
Cell swelling as a result of hypotonic stress is counteracted in mammalian cells by a process called regulatory volume decrease (RVD). We have recently discovered that RVD of human keratinocytes requires the LRRC8 volume-regulated anion channel (VRAC) and that Ca2+ exerts a modulatory function on RVD. However, the ion channel that is responsible for Ca2+ influx remains unknown. We investigated in this study whether the Ca2+-permeable TRPV4 ion channel, which functions as cell volume sensor in many cell types, may be involved in cell volume regulation during hypotonic stress response of human keratinocytes. We interfered with TRPV4 function in two human keratinocyte cell lines (HaCaT and NHEK-E6/E7) by using two TRPV4-specific inhibitors (RN1734 and GSK2193874), and by creating a CRISPR/Cas9-mediated genetic TRPV4-/- knockout in HaCaT cells. We employed electrophysiological patch clamp analysis, fluorescence-based Ca2+ imaging and cell volume measurements to determine the functional importance of TRPV4. We could show that both hypotonic stress and direct activation of TRPV4 by the specific agonist GSK1016790A triggered intracellular Ca2+ response. Strikingly, the Ca2+ increase upon hypotonic stress was neither affected by genetic knockout of TRPV4 in HaCaT cells nor by pharmacological inhibition of TRPV4 in both keratinocyte cell lines. Accordingly, hypotonicity-induced cell swelling, downstream activation of VRAC currents as well as subsequent RVD were unaffected both in TRPV4 inhibitor-treated keratinocytes and in HaCaT-TRPV4-/- cells. In summary, our study shows that keratinocytes do not require TRPV4 for coping with hypotonic stress, which implies the involvement of other, yet unidentified Ca2+ channels.
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Affiliation(s)
| | - Magdalena Jahn
- BRAIN Biotech AG, Zwingenberg, Germany; Department of Dermatology, Venerology and Allergology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | | | - Cristina Jung
- Membrane Biophysics, Department of Biology, TU Darmstadt, Darmstadt, Germany
| | - Tiziana Cesetti
- Institute of Molecular and Cell Biology, Hochschule Mannheim, Mannheim, Germany; Center for Mass Spectrometry and Optical Spectroscopy, Hochschule Mannheim, Mannheim, Germany
| | - Nathalie Couturier
- Institute of Molecular and Cell Biology, Hochschule Mannheim, Mannheim, Germany; Center for Mass Spectrometry and Optical Spectroscopy, Hochschule Mannheim, Mannheim, Germany
| | - Rüdiger Rudolf
- Institute of Molecular and Cell Biology, Hochschule Mannheim, Mannheim, Germany; Center for Mass Spectrometry and Optical Spectroscopy, Hochschule Mannheim, Mannheim, Germany
| | - Naemi Reuscher
- Department of Dermatology, Venerology and Allergology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Claudia Buerger
- Department of Dermatology, Venerology and Allergology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Oliver Rauh
- Membrane Biophysics, Department of Biology, TU Darmstadt, Darmstadt, Germany
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Hu Y, Li K, Swahn H, Ordoukhanian P, Head SR, Natarajan P, Woods AK, Joseph SB, Johnson KA, Lotz MK. Transcriptomic analyses of joint tissues during osteoarthritis development in a rat model reveal dysregulated mechanotransduction and extracellular matrix pathways. Osteoarthritis Cartilage 2023; 31:199-212. [PMID: 36354073 PMCID: PMC9892293 DOI: 10.1016/j.joca.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 09/20/2022] [Accepted: 10/03/2022] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Transcriptomic changes in joint tissues during the development of osteoarthritis (OA) are of interest for the discovery of biomarkers and mechanisms of disease. The objective of this study was to use the rat medial meniscus transection (MMT) model to discover stage and tissue-specific transcriptomic changes. DESIGN Sham or MMT surgeries were performed in mature rats. Cartilage, menisci and synovium were scored for histopathological changes at 2, 4 and 6 weeks post-surgery and processed for RNA-sequencing. Differentially expressed genes (DEG) were used to identify pathways and mechanisms. Published transcriptomic datasets from animal models and human OA were used to confirm and extend present findings. RESULTS The total number of DEGs was already high at 2 weeks (723 in meniscus), followed by cartilage (259) and synovium (42) and declined to varying degrees in meniscus and synovium but increased in cartilage at 6 weeks. The most upregulated genes included tenascins. The 'response to mechanical stimulus' and extracellular matrix-related pathways were enriched in both cartilage and meniscus. Pathways that were enriched in synovium at 4 weeks indicate processes related to synovial hyperplasia and fibrosis. Synovium also showed upregulation of IL-11 and several MMPs. The mechanical stimulus pathway included upregulation of the mechanoreceptors PIEZO1, PIEZO2 and TRPV4 and nerve growth factor. Analysis of data from prior RNA-sequencing studies of animal models and human OA support these findings. CONCLUSION These results indicate several shared pathways that are affected during OA in cartilage and meniscus and support the role of mechanotransduction and other pathways in OA pathogenesis.
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Affiliation(s)
- Y Hu
- Department of Molecular Medicine, Scripps Research, La Jolla, CA, 92037, USA; Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - K Li
- Department of Molecular Medicine, Scripps Research, La Jolla, CA, 92037, USA
| | - H Swahn
- Department of Molecular Medicine, Scripps Research, La Jolla, CA, 92037, USA
| | - P Ordoukhanian
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, CA, 92037, USA
| | - S R Head
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, CA, 92037, USA
| | - P Natarajan
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, CA, 92037, USA
| | - A K Woods
- Calibr, a Division of Scripps Research, La Jolla, CA, 92037, USA
| | - S B Joseph
- Calibr, a Division of Scripps Research, La Jolla, CA, 92037, USA
| | - K A Johnson
- Calibr, a Division of Scripps Research, La Jolla, CA, 92037, USA
| | - M K Lotz
- Department of Molecular Medicine, Scripps Research, La Jolla, CA, 92037, USA.
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Mihara H, Uchida K, Watanabe Y, Nanjo S, Sakumura M, Motoo I, Ando T, Minemura M, Muhammad JS, Yamamoto H, Itoh F, Yasuda I. Colonic TRPV4 overexpression is related to constipation severity. BMC Gastroenterol 2023; 23:13. [PMID: 36639736 PMCID: PMC9838009 DOI: 10.1186/s12876-023-02647-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 01/10/2023] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Chronic constipation is prevalent and involves both colon sensitivity and various changes in intestinal bacteria, particularly mucosa-associated microflora. Here we examined regulatory mechanisms of TRPV4 expression by co-culturing colon epithelial cell lines with intestinal bacteria and their derivatives. We also investigated TRPV4 expression in colon epithelium from patients with constipation. METHODS Colon epithelial cell lines were co-cultured with various enterobacteria (bacterial components and supernatant), folate, LPS, or short chain fatty acids. TRPV4 expression levels and promoter DNA methylation were assessed using pyrosequencing, and microarray network analysis. For human samples, correlation coefficients were calculated and multiple regression analyses were used to examine the association between clinical background, rectal TRPV4 expression level and mucosa-associated microbiota. RESULTS Co-culture of CCD841 cells with P. acnes, C. perfringens, or S. aureus transiently decreased TRPV4 expression but did not induce methylation. Co-culture with clinical isolates and standard strains of K. oxytoca, E. faecalis, or E. coli increased TRPV4 expression in CCD841 cells, and TRPV4 and TNF-alpha expression were increased by E. coli culture supernatants but not bacterial components. Although folate, LPS, IL-6, TNF-alpha, or SCFAs alone did not alter TRPV4 expression, TRPV4 expression following exposure to E. coli culture supernatants was inhibited by butyrate or TNF-alphaR1 inhibitor and increased by p38 inhibitor. Microarray network analysis showed activation of TNF-alpha, cytokines, and NOD signaling. TRPV4 expression was higher in constipated patients from the terminal ileum to the colorectum, and multiple regression analyses showed that low stool frequency, frequency of defecation aids, and duration were associated with TRPV4 expression. Meanwhile, incomplete defecation, time required to defecate, and number of defecation failures per 24 h were associated with increased E. faecalis frequency. CONCLUSIONS Colon epithelium cells had increased TRPV4 expression upon co-culture with K. oxytoca, E. faecalis, or E. coli supernatants, as well as TNFα-stimulated TNFαR1 expression via a pathway other than p38. Butyrate treatment suppressed this increase. Epithelial TRPV4 expression was increased in constipated patients, suggesting that TRPV4 together with increased frequency of E. faecalis may be involved in the pathogenesis of various constipation symptoms.
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Affiliation(s)
- Hiroshi Mihara
- grid.267346.20000 0001 2171 836XCenter for Medical Education and Career Development, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan ,grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Kunitoshi Uchida
- grid.418046.f0000 0000 9611 5902Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan
| | - Yoshiyuki Watanabe
- Department of Internal Medicine, Kawasaki Rinko General Hospital, Kawasaki, Japan ,grid.412764.20000 0004 0372 3116Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Sohachi Nanjo
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Miho Sakumura
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Iori Motoo
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Takayuki Ando
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Masami Minemura
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Jibran Sualeh Muhammad
- grid.412789.10000 0004 4686 5317Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Hiroyuki Yamamoto
- grid.26999.3d0000 0001 2151 536XDepartment of Bioinformatics, St. Marianna University Graduate School of Medicine, Kawasaki, Japan
| | - Fumio Itoh
- grid.412764.20000 0004 0372 3116Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Ichiro Yasuda
- grid.267346.20000 0001 2171 836XDepartment of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
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10
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Study on the role of calcium channel protein TRPV4 in the inflammatory pathway of type 2 diabetic adipose tissue based on gene databases. Biochem Biophys Res Commun 2023; 639:161-168. [PMID: 36495765 DOI: 10.1016/j.bbrc.2022.11.078] [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: 11/07/2022] [Revised: 11/15/2022] [Accepted: 11/25/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Chronic inflammation of adipose tissue may be one of the key factors contributing to the development of insulin resistance in T2DM adipose tissue. Transient receptor potential vanilloid type 4 (TRPV4) can be involved in a variety of cellular inflammatory responses. In this study, we evaluated the role of TRPV4 channelin in the T2DM adipose tissue inflammatory pathway. METHODS Based on the gene expression profiling data of the public database, bioinformatics methods were used to screen the target gene population of the TRPV4 channel protein involved in the regulation of T2DM fat cells. A mature adipocyte model was constructed to verify the expression level of target genes and to evaluate the regulatory effect of TRPV4 channel inhibition on target genes of inflammation-related pathways. RESULTS In shTRPV4 adipocytes, 144 genes with downregulation expression were screened, a PPI network was constructed and a core module containing 15 genes was screened out, and the core genes were mainly enriched in the Toll-like receptor signaling pathway through enrichment analysis. Constructing a mature adipocyte model found that the TRPV4 inhibitor HC067047 inhibited the effect of upregulation of the expression level of the relevant gene in the signaling pathway. CONCLUSIONS Our findings suggest that the expression of highly expressed pro-inflammatory cytokines and chemokines in T2DM adipose tissue decreases after inhibiting the expression of TRPV4 in adipocytes, suggesting that TRPV4 may become a potential drug target for the treatment of T2DM.
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11
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Physiological Cooperation between Aquaporin 5 and TRPV4. Int J Mol Sci 2022; 23:ijms231911634. [PMID: 36232935 PMCID: PMC9570067 DOI: 10.3390/ijms231911634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/15/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
Aquaporins—among them, AQP5—are responsible for transporting water across biological membranes, which is an important process in all living organisms. The transient receptor potential channel 4 (TRPV4) is a cation channel that is mostly calcium-permeable and can also be activated by osmotic stimuli. It plays a role in a number of different functions in the body, e.g., the development of bones and cartilage, and it is involved in the body’s osmoregulation, the generation of certain types of sensation (pain), and apoptosis. Our earlier studies on the uterus and the literature data aroused our interest in the physiological role of the cooperation of AQP5 and TRPV4. In this review, we focus on the co-expression and cooperation of AQP5 and TRPV4 in the lung, salivary glands, uterus, adipose tissues, and lens. Understanding the cooperation between AQP5 and TRPV4 may contribute to the development of new drug candidates and the therapy of several disorders (e.g., preterm birth, cataract, ischemia/reperfusion-induced edema, exercise- or cold-induced asthma).
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12
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Lansdell TA, Chambers LC, Dorrance AM. Endothelial Cells and the Cerebral Circulation. Compr Physiol 2022; 12:3449-3508. [PMID: 35766836 DOI: 10.1002/cphy.c210015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Endothelial cells form the innermost layer of all blood vessels and are the only vascular component that remains throughout all vascular segments. The cerebral vasculature has several unique properties not found in the peripheral circulation; this requires that the cerebral endothelium be considered as a unique entity. Cerebral endothelial cells perform several functions vital for brain health. The cerebral vasculature is responsible for protecting the brain from external threats carried in the blood. The endothelial cells are central to this requirement as they form the basis of the blood-brain barrier. The endothelium also regulates fibrinolysis, thrombosis, platelet activation, vascular permeability, metabolism, catabolism, inflammation, and white cell trafficking. Endothelial cells regulate the changes in vascular structure caused by angiogenesis and artery remodeling. Further, the endothelium contributes to vascular tone, allowing proper perfusion of the brain which has high energy demands and no energy stores. In this article, we discuss the basic anatomy and physiology of the cerebral endothelium. Where appropriate, we discuss the detrimental effects of high blood pressure on the cerebral endothelium and the contribution of cerebrovascular disease endothelial dysfunction and dementia. © 2022 American Physiological Society. Compr Physiol 12:3449-3508, 2022.
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Affiliation(s)
- Theresa A Lansdell
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
| | - Laura C Chambers
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
| | - Anne M Dorrance
- Department of Pharmacology and Toxicology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, 48824, USA
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13
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Ślęczkowska M, Almomani R, Marchi M, de Greef BTA, Sopacua M, Hoeijmakers JGJ, Lindsey P, Salvi E, Bönhof GJ, Ziegler D, Malik RA, Waxman SG, Lauria G, Faber CG, Smeets HJM, Gerrits MM. Peripheral Ion Channel Gene Screening in Painful- and Painless-Diabetic Neuropathy. Int J Mol Sci 2022; 23:ijms23137190. [PMID: 35806193 PMCID: PMC9266298 DOI: 10.3390/ijms23137190] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 02/01/2023] Open
Abstract
Neuropathic pain is common in diabetic peripheral neuropathy (DN), probably caused by pathogenic ion channel gene variants. Therefore, we performed molecular inversion probes-next generation sequencing of 5 transient receptor potential cation channels, 8 potassium channels and 2 calcium-activated chloride channel genes in 222 painful- and 304 painless-DN patients. Twelve painful-DN (5.4%) patients showed potentially pathogenic variants (five nonsense/frameshift, seven missense, one out-of-frame deletion) in ANO3 (n = 3), HCN1 (n = 1), KCNK18 (n = 2), TRPA1 (n = 3), TRPM8 (n = 3) and TRPV4 (n = 1) and fourteen painless-DN patients (4.6%-three nonsense/frameshift, nine missense, one out-of-frame deletion) in ANO1 (n = 1), KCNK18 (n = 3), KCNQ3 (n = 1), TRPA1 (n = 2), TRPM8 (n = 1), TRPV1 (n = 3) and TRPV4 (n = 3). Missense variants were present in both conditions, presumably with loss- or gain-of-functions. KCNK18 nonsense/frameshift variants were found in painless/painful-DN, making a causal role in pain less likely. Surprisingly, premature stop-codons with likely nonsense-mediated RNA-decay were more frequent in painful-DN. Although limited in number, painful-DN patients with ion channel gene variants reported higher maximal pain during the night and day. Moreover, painful-DN patients with TRP variants had abnormal thermal thresholds and more severe pain during the night and day. Our results suggest a role of ion channel gene variants in neuropathic pain, but functional validation is required.
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Affiliation(s)
- Milena Ślęczkowska
- Department of Toxicogenomics, Maastricht University, 6229 ER Maastricht, The Netherlands; (R.A.); (P.L.); (H.J.M.S.)
- School of Mental Health and Neuroscience, Maastricht University, 6229 ER Maastricht, The Netherlands
- Correspondence:
| | - Rowida Almomani
- Department of Toxicogenomics, Maastricht University, 6229 ER Maastricht, The Netherlands; (R.A.); (P.L.); (H.J.M.S.)
- Department of Neurology, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands; (B.T.A.d.G.); (M.S.); (J.G.J.H.); (C.G.F.)
- Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Margherita Marchi
- Neuroalgology Unit, IRCCS Foundation “Carlo Besta” Neurological Institute, 20133 Milan, Italy; (M.M.); (E.S.); (G.L.)
| | - Bianca T. A. de Greef
- Department of Neurology, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands; (B.T.A.d.G.); (M.S.); (J.G.J.H.); (C.G.F.)
| | - Maurice Sopacua
- Department of Neurology, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands; (B.T.A.d.G.); (M.S.); (J.G.J.H.); (C.G.F.)
| | - Janneke G. J. Hoeijmakers
- Department of Neurology, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands; (B.T.A.d.G.); (M.S.); (J.G.J.H.); (C.G.F.)
| | - Patrick Lindsey
- Department of Toxicogenomics, Maastricht University, 6229 ER Maastricht, The Netherlands; (R.A.); (P.L.); (H.J.M.S.)
| | - Erika Salvi
- Neuroalgology Unit, IRCCS Foundation “Carlo Besta” Neurological Institute, 20133 Milan, Italy; (M.M.); (E.S.); (G.L.)
| | - Gidon J. Bönhof
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany; (G.J.B.); (D.Z.)
- Department of Endocrinology and Diabetology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Dan Ziegler
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany; (G.J.B.); (D.Z.)
| | - Rayaz A. Malik
- Division of Cardiovascular Sciences, University of Manchester, Manchester M13 9PL, UK;
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha P.O. Box 24144, Qatar
| | - Stephen G. Waxman
- Department of Neurology and Center for Neuroscience and Regeneration Research, Yale University School of Medicine, New Haven, CT 06510, USA;
- Center for Neuroscience and Regeneration Research, Veterans Affairs Medical Center, West Haven, CT 06516, USA
| | - Giuseppe Lauria
- Neuroalgology Unit, IRCCS Foundation “Carlo Besta” Neurological Institute, 20133 Milan, Italy; (M.M.); (E.S.); (G.L.)
| | - Catharina G. Faber
- Department of Neurology, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands; (B.T.A.d.G.); (M.S.); (J.G.J.H.); (C.G.F.)
| | - Hubert J. M. Smeets
- Department of Toxicogenomics, Maastricht University, 6229 ER Maastricht, The Netherlands; (R.A.); (P.L.); (H.J.M.S.)
- School of Mental Health and Neuroscience, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Monique M. Gerrits
- Department of Clinical Genetics, Maastricht University Medical Centre, 6229 HX Maastricht, The Netherlands;
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14
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Aisenberg WH, McCray BA, Sullivan JM, Diehl E, DeVine LR, Alevy J, Bagnell AM, Carr P, Donohue JK, Goretzki B, Cole RN, Hellmich UA, Sumner CJ. Multiubiquitination of TRPV4 reduces channel activity independent of surface localization. J Biol Chem 2022; 298:101826. [PMID: 35300980 PMCID: PMC9010760 DOI: 10.1016/j.jbc.2022.101826] [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: 08/25/2021] [Revised: 02/19/2022] [Accepted: 02/21/2022] [Indexed: 02/06/2023] Open
Abstract
Ubiquitin (Ub)-mediated regulation of plasmalemmal ion channel activity canonically occurs via stimulation of endocytosis. Whether ubiquitination can modulate channel activity by alternative mechanisms remains unknown. Here, we show that the transient receptor potential vanilloid 4 (TRPV4) cation channel is multiubiquitinated within its cytosolic N-terminal and C-terminal intrinsically disordered regions (IDRs). Mutagenizing select lysine residues to block ubiquitination of the N-terminal but not C-terminal IDR resulted in a marked elevation of TRPV4-mediated intracellular calcium influx, without increasing cell surface expression levels. Conversely, enhancing TRPV4 ubiquitination via expression of an E3 Ub ligase reduced TRPV4 channel activity but did not decrease plasma membrane abundance. These results demonstrate Ub-dependent regulation of TRPV4 channel function independent of effects on plasma membrane localization. Consistent with ubiquitination playing a key negative modulatory role of the channel, gain-of-function neuropathy-causing mutations in the TRPV4 gene led to reduced channel ubiquitination in both cellular and Drosophila models of TRPV4 neuropathy, whereas increasing mutant TRPV4 ubiquitination partially suppressed channel overactivity. Together, these data reveal a novel mechanism via which ubiquitination of an intracellular flexible IDR domain modulates ion channel function independently of endocytic trafficking and identify a contributory role for this pathway in the dysregulation of TRPV4 channel activity by neuropathy-causing mutations.
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Affiliation(s)
- William H Aisenberg
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Brett A McCray
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy M Sullivan
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Erika Diehl
- Department of Chemistry, Biochemistry Section, Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - Lauren R DeVine
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jonathan Alevy
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anna M Bagnell
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Patrice Carr
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jack K Donohue
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Benedikt Goretzki
- Institute of Organic Chemistry and Macromolecular Chemistry, Cluster of Excellence 'Balance of the Microverse', Friedrich-Schiller-Universität, Jena, Germany; Center for Biomolecular Magnetic Resonance (BMRZ), Goethe-Universität, Frankfurt am Main, Germany
| | - Robert N Cole
- Institute of Organic Chemistry and Macromolecular Chemistry, Cluster of Excellence 'Balance of the Microverse', Friedrich-Schiller-Universität, Jena, Germany
| | - Ute A Hellmich
- Institute of Organic Chemistry and Macromolecular Chemistry, Cluster of Excellence 'Balance of the Microverse', Friedrich-Schiller-Universität, Jena, Germany; Center for Biomolecular Magnetic Resonance (BMRZ), Goethe-Universität, Frankfurt am Main, Germany
| | - Charlotte J Sumner
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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15
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Zhang M, Wu X, Du G, Chen W, Zhang Q. Substrate stiffness-dependent regulatory volume decrease and calcium signaling in chondrocytes. Acta Biochim Biophys Sin (Shanghai) 2021; 54:113-125. [PMID: 35130619 PMCID: PMC9909316 DOI: 10.3724/abbs.2021008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The pericellular matrix stiffness is strongly associated with its biochemical and structural changes during the aging and osteoarthritis progress of articular cartilage. However, how substrate stiffness modulates the chondrocyte regulatory volume decrease (RVD) and calcium signaling in chondrocytes remains unknown. This study aims to investigate the effects of substrate stiffness on the chondrocyte RVD and calcium signaling by recapitulating the physiologically relevant substrate stiffness. Our results showed that substrate stiffness induces completely different dynamical deformations between the cell swelling and recovering progresses. Chondrocytes swell faster on the soft substrate but recovers slower than the stiff substrate during the RVD response induced by the hypo-osmotic challenge. We found that stiff substrate enhances the cytosolic Ca oscillation of chondrocytes in the iso-osmotic medium. Furthermore, chondrocytes exhibit a distinctive cytosolic Ca oscillation during the RVD response. Soft substrate significantly improves the Ca oscillation in the cell swelling process whereas stiff substrate enhances the cytosolic Ca oscillation in the cell recovering process. Our work also suggests that the TRPV4 channel is involved in the chondrocyte sensing substrate stiffness by mediating Ca signaling in a stiffness-dependent manner. This helps to understand a previously unidentified relationship between substrate stiffness and RVD response under the hypo-osmotic challenge. A better understanding of substrate stiffness regulating chondrocyte volume and calcium signaling will aid the development of novel cell-instructive biomaterial to restore cellular functions.
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Affiliation(s)
- Min Zhang
- 1.College of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan030024China
| | - Xiaoan Wu
- 2.Department of Physiology and BiophysicsMiller School of MedicineUniversity of MiamiMiamiFL33136USA
| | - Genlai Du
- 3.Department of Cell Biology and Medical GeneticsSchool of Basic Medical ScienceShanxi Medical UniversityTaiyuan030001China
| | - Weiyi Chen
- 1.College of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan030024China,Correspondence address: +86-13700500252; E-mail: (Q.Z.) / Tel: +86-13015477101; E-mail: (W.C.)@tyut.edu.cn
| | - Quanyou Zhang
- 1.College of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan030024China,4.Department of Orthopaedicsthe Second Hospital of Shanxi Medical UniversityShanxi Key Laboratory of Bone and Soft Tissue Injury RepairShanxi Medical UniversityTaiyuan030001China,Correspondence address: +86-13700500252; E-mail: (Q.Z.) / Tel: +86-13015477101; E-mail: (W.C.)@tyut.edu.cn
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16
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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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17
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Uchida T, Shimizu S, Yamagishi R, Tokuoka SM, Kita Y, Sakata R, Honjo M, Aihara M. TRPV4 is activated by mechanical stimulation to induce prostaglandins release in trabecular meshwork, lowering intraocular pressure. PLoS One 2021; 16:e0258911. [PMID: 34673834 PMCID: PMC8530296 DOI: 10.1371/journal.pone.0258911] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 10/07/2021] [Indexed: 11/25/2022] Open
Abstract
Trabecular meshwork constitutes the conventional outflow pathway and controls intraocular pressure by regulating aqueous outflow. Mechanical stimulation has been studied as one of the triggers to regulate aqueous outflow in trabecular meshwork, but it is not well understood. We investigated that how transient receptor potential cation channel subfamily V member 4 (TRPV4) functions in human trabecular meshwork cells (HTMC) and affects intraocular pressure (IOP). HTMC were treated with TRPV4 siRNA, followed by incubation for 24 hours. We confirmed the suppression of TRPV4 mRNA expression and the reduction of Ca2+ influx by the TRPV4 agonist GSK1016790A in TRPV4 siRNA-treated HTMC. TRPV4 siRNA-treated HTMC exhibited a significant reduction in Ca2+ influx and production of arachidonic acid and prostaglandin (PG) E2 induced by mechanical stretch, and direct activation of TRPV4 by GSK1016790A increased production of arachidonic acid, PGE2, and PGD2 and inhibited gel contraction. Furthermore, TRPV4-deficient mice had higher IOP than wild-type mice, and GSK1016790A administration lowered IOP. These results suggest that TRPV4 mediates the cellular response induced by trabecular meshwork stretch, leading to IOP reduction through the production of prostaglandins and inhibition of cell contraction. Targeting TRPV4 may have therapeutic benefits that lead to lowering IOP in glaucoma patients.
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Affiliation(s)
- Takatoshi Uchida
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
- Senju Laboratory of Ocular Science, Senju Pharmaceutical Co., Ltd., Kobe, Japan
| | - Shota Shimizu
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
- Senju Laboratory of Ocular Science, Senju Pharmaceutical Co., Ltd., Kobe, Japan
| | - Reiko Yamagishi
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - Suzumi M. Tokuoka
- Department of Lipidomics, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - Yoshihiro Kita
- Department of Lipidomics, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
- Life Science Core Facility, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - Rei Sakata
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - Megumi Honjo
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - Makoto Aihara
- Department of Ophthalmology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
- * E-mail:
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18
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Lan Z, Chen L, Feng J, Xie Z, Liu Z, Wang F, Liu P, Yue X, Du L, Zhao Y, Yang P, Luo J, Zhu Z, Hu X, Cao L, Lu P, Sah R, Lavine K, Kim B, Hu H. Mechanosensitive TRPV4 is required for crystal-induced inflammation. Ann Rheum Dis 2021; 80:1604-1614. [PMID: 34663597 DOI: 10.1136/annrheumdis-2021-220295] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 09/13/2021] [Indexed: 12/12/2022]
Abstract
Crystal structures activate innate immune cells, especially macrophages and initiate inflammatory responses. We aimed to understand the role of the mechanosensitive TRPV4 channel in crystal-induced inflammation. Real-time RT-PCR, RNAscope in situ hybridisation, and Trpv4eGFP mice were used to examine TRPV4 expression and whole-cell patch-clamp recording and live-cell Ca2+ imaging were used to study TRPV4 function in mouse synovial macrophages and human peripheral blood mononuclear cells (PBMCs). Both genetic deletion and pharmacological inhibition approaches were used to investigate the role of TRPV4 in NLRP3 inflammasome activation induced by diverse crystals in vitro and in mouse models of crystal-induced pain and inflammation in vivo. TRPV4 was functionally expressed by synovial macrophages and human PBMCs and TRPV4 expression was upregulated by stimulation with monosodium urate (MSU) crystals and in human PBMCs from patients with acute gout flares. MSU crystal-induced gouty arthritis were significantly reduced by either genetic ablation or pharmacological inhibition of TRPV4 function. Mechanistically, TRPV4 mediated the activation of NLRP3 inflammasome by diverse crystalline materials but not non-crystalline NLRP3 inflammasome activators, driving the production of inflammatory cytokine interleukin-1β which elicited TRPV4-dependent inflammatory responses in vivo. Moreover, chemical ablation of the TRPV1-expressing nociceptors significantly attenuated the MSU crystal-induced gouty arthritis. In conclusion, TRPV4 is a common mediator of inflammatory responses induced by diverse crystals through NLRP3 inflammasome activation in macrophages. TRPV4-expressing resident macrophages are critically involved in MSU crystal-induced gouty arthritis. A neuroimmune interaction between the TRPV1-expressing nociceptors and the TRPV4-expressing synovial macrophages contributes to the generation of acute gout flares.
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Affiliation(s)
- Zhou Lan
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, People's Republic of China
| | - Lvyi Chen
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA .,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, Hubei, People's Republic of China
| | - Jing Feng
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Zili Xie
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Zhiyong Liu
- Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Fang Wang
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,Division of Dermatology, Department of Medicine, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Peng Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, Hubei, People's Republic of China
| | - Xueping Yue
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Lixia Du
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Yonghui Zhao
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Pu Yang
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Jialie Luo
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Zhe Zhu
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA
| | - Xueming Hu
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Liang Cao
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Ping Lu
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Rajan Sah
- Department of Internal Medicine, Cardiovascular Division, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Kory Lavine
- Department of Internal Medicine, Cardiovascular Division, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Brian Kim
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA.,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,Division of Dermatology, Department of Medicine, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,Department of Pathology and Immunology, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
| | - Hongzhen Hu
- Department of Anesthesiology, Washington University School of Medicine in St Louis, St. Louis, Missouri, USA .,Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.,Division of Dermatology, Department of Medicine, Washington University School of Medicine in St Louis, St Louis, Missouri, USA
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19
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Toft-Bertelsen TL, MacAulay N. TRPing on Cell Swelling - TRPV4 Senses It. Front Immunol 2021; 12:730982. [PMID: 34616399 PMCID: PMC8488219 DOI: 10.3389/fimmu.2021.730982] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 08/30/2021] [Indexed: 11/29/2022] Open
Abstract
The transient receptor potential vanilloid 4 channel (TRPV4) is a non-selective cation channel that is widely expressed and activated by a range of stimuli. Amongst these stimuli, changes in cell volume feature as a prominent regulator of TRPV4 activity with cell swelling leading to channel activation. In experimental settings based on abrupt introduction of large osmotic gradients, TRPV4 activation requires co-expression of an aquaporin (AQP) to facilitate such cell swelling. However, TRPV4 readily responds to cell volume increase irrespectively of the molecular mechanism underlying the cell swelling and can, as such, be considered a sensor of increased cell volume. In this review, we will discuss the proposed events underlying the molecular coupling from cell swelling to channel activation and present the evidence of direct versus indirect swelling-activation of TRPV4. With this summary of the current knowledge of TRPV4 and its ability to sense cell volume changes, we hope to stimulate further experimental efforts in this area of research to clarify TRPV4’s role in physiology and pathophysiology.
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Affiliation(s)
| | - Nanna MacAulay
- Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
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20
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Ågren L, Elfsmark L, Akfur C, Jonasson S. High concentrations of ammonia induced cytotoxicity and bronchoconstriction in a precision-cut lung slices rat model. Toxicol Lett 2021; 349:51-60. [PMID: 34118312 DOI: 10.1016/j.toxlet.2021.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/26/2021] [Accepted: 06/07/2021] [Indexed: 12/13/2022]
Abstract
Exposure to high concentrations of ammonia (NH3) can cause life-threatening lung damages. The objective of this study was to establish a translational in vitro model for NH3-induced lung injury. Precision-cut lung slices (PCLS) from rats were exposed to NH3 and toxicological responses and cell viability were quantified by analysis of LDH, WST-1, inflammatory mediators (IL-1β, IL-6, CINC-1, MMP-9, RAGE and IL-18), and by microscopic evaluation of bronchoconstriction induced by electric-field-stimulation (EFS) or methacholine (MCh). Different treatment strategies were assessed to prevent or reverse the damages caused by NH3 using anti-inflammatory, anti-oxidant or neurologically active drugs. Exposure to NH3 caused a concentration-dependent increase in cytotoxicity (LDH/WST-1) and IL-1β release in PCLS medium. None of the treatments reduced cytotoxicity. Deposition of NH3 (24-59 mM) on untreated PCLS elicited an immediate concentration-dependent bronchoconstriction. Unlike MCh, the EFS method did not constrict the airways in PCLS at 5 h after NH3-exposure (47-59 mM). Atropine and TRP-channel antagonists blocked EFS-induced bronchoconstriction but these inhibitors could not block the immediate NH3-induced bronchoconstriction. In conclusion, NH3 exposure caused cytotoxic effects and lung damages in a concentration-dependent manner and this PCLS method offers a way to identify and test new concepts of medical treatments and biomarkers that may be of prognostic value.
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Affiliation(s)
- Lina Ågren
- Swedish Defence Research Agency, CBRN Defence and Security, Umeå, Sweden
| | - Linda Elfsmark
- Swedish Defence Research Agency, CBRN Defence and Security, Umeå, Sweden
| | - Christine Akfur
- Swedish Defence Research Agency, CBRN Defence and Security, Umeå, Sweden
| | - Sofia Jonasson
- Swedish Defence Research Agency, CBRN Defence and Security, Umeå, Sweden.
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21
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Ahmed A, Naidu A. Towards better understanding of giant cell granulomas of the oral cavity. J Clin Pathol 2021; 74:483-490. [PMID: 33858937 DOI: 10.1136/jclinpath-2020-206858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 12/08/2020] [Accepted: 12/22/2020] [Indexed: 12/20/2022]
Abstract
Giant cell granulomas are enigmatic lesions of the oral cavity characterised by a peculiar combined proliferation of mononuclear and multinucleated giant cells in a mesenchymal stromal background. Central and peripheral giant cell granulomas may have similar pathogenesis and histology but differ in their location and biological behaviour. It is important to differentiate them from other giant cell lesions that can occur in the oral cavity, such as giant cell tumour of the bone, aneurysmal bone cyst, brown tumour of hyperparathyroidism, and giant cell lesions of Ramon syndrome, Noonan syndrome, neurofibromatosis and Jaffe-Campanacci syndrome. A recent insight into their molecular genetics and pathogenesis, with identification of KRAS, FGFR1 and TRPV4 mutations, allows for better diagnostic differentiation and opens the door to the use of pathway inhibitors in the treatment of recurrent or dysmorphic lesions. In this review, we provide an updated summary of the clinical and pathological features of oral cavity giant cell granulomas that help with their precise diagnosis and management.
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Affiliation(s)
- Atif Ahmed
- Pathology and Laboratory Medicine, University of Missouri Kansas City, Kansas City, Missouri, USA .,Children's Mercy Hospital, Kansas City, Missouri, USA
| | - Aparna Naidu
- Oral Pathology, University of Missouri Kansas City, Kansas City, Missouri, USA
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22
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Abstract
Introduction: Transient receptor potential vanilloid 4 (TRPV4) is an ion channel that is widely expressed and is activated by numerous chemical, osmotic and mechanical stimuli. By modulating Ca2+ entry, TRPV4 regulates cellular signaling associated with a variety of (patho)physiological processes and is a target of interest for treatment of human diseases including heart failure, respiratory diseases, gastrointestinal disorders, dermatological conditions, pain and cancer, among others.Areas covered: This article reviews small molecule TRPV4 antagonists and new therapeutic use claims disclosed in the patent literature from 2015 to 2020, including applications covering the first potent and selective TRPV4 clinical candidate and other advanced chemotypes.Expert opinion: TRPV4 has proven to be a tractable target and significant progress in discovery of TRPV4 antagonists has been realized in recent years. Several unique chemical templates with drug-like properties inhibit the channel and show efficacy in models that suggest their potential for treatment of a variety of diseases. While compelling clinical efficacy has not yet been seen in the limited early studies conducted with GSK2798745, evaluation of TRPV4 antagonists in larger trials across several indications is warranted given the availability of high-quality candidates and the promise of therapeutic benefit based on pre-clinical evidence.
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Affiliation(s)
- Brian G Lawhorn
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, GlaxoSmithKline, Collegeville, Pennsylvania, United States
| | - Edward J Brnardic
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, GlaxoSmithKline, Collegeville, Pennsylvania, United States
| | - David J Behm
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, GlaxoSmithKline, Collegeville, Pennsylvania, United States
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23
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Abstract
The transient receptor potential (TRP) channel superfamily is comprised of a large group of cation-permeable channels, which display an extraordinary diversity of roles in sensory signaling and are involved in plethora of animal behaviors. These channels are activated through a wide variety of mechanisms and participate in virtually every sensory modality. Modulating TRP channel activity provides an important way to regulate membrane excitability and intracellular calcium levels. This is reflected by the fact that small molecule compounds modulating different TRPs have all entered clinical trials for a variety of diseases. The role of TRPs will be further elucidated in complex diseases of the nervous, intestinal, renal, urogenital, respiratory, and cardiovascular systems in diverse therapeutic areas including pain and itch, headache, pulmonary function, oncology, neurology, visceral organs, and genetic diseases. This review focuses on recent developments in the TRP ion channel-related area and highlights evidence supporting TRP channels as promising targets for new analgesic drugs for therapeutic intervention. This review presents a variety of: (1) phylogeny aspects of TRP channels; (2) some structural and functional characteristics of TRPs; (3) a general view and short characteristics of main seven subfamilies of TRP channels; (4) the evidence for consider TRP channels as therapeutic and analgesic targets; and finally (5) further perspectives of TRP channels research.
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24
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Abstract
Emerging evidence shows that the transient receptor potential vanilloid 4 (TRPV4) channel is involved in fibrosis in many organs. However, its role in diabetic cardiac fibrosis remains unclear. Our aim was to evaluate the expression level of TRPV4 in the diabetic heart and clarify its role in diabetes-induced cardiac fibrosis. A diabetic animal model was induced by a single intraperitoneal injection of streptozotocin into Sprague-Dawley rats. We also investigated cardiac fibroblasts isolated from neonatal Sprague-Dawley rats. TRPV4 expression was significantly upregulated in both diabetic myocardium and cardiac fibroblasts cultured in high-glucose medium. Masson's trichrome staining revealed that the TRPV4 antagonist HC067047 attenuated the diabetes-induced cardiac fibrosis. Furthermore, HC067047 reduced collagen Ι synthesis and suppressed the transforming growth factor beta 1 (TGF-β1) level as well as the phosphorylation of Smad3 in the diabetic heart. In addition, the TRPV4 antagonist inhibited the proliferation of cardiac fibroblasts, collagen Ι synthesis, and activation of the TGF-β1/Smad3 signaling pathway induced by high-glucose culture medium. Our findings demonstrate that the upregulation of TRPV4 expression mediates diabetic cardiac fibrosis via activation of the TGF-β1/Smad3 signaling pathway.
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25
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Lazarowski ER, Boucher RC. Purinergic receptors in airway hydration. Biochem Pharmacol 2021; 187:114387. [PMID: 33358825 DOI: 10.1016/j.bcp.2020.114387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 02/08/2023]
Abstract
Airway epithelial purinergic receptors control key components of the mucociliary clearance (MCC), the dominant component of pulmonary host defense. In healthy airways, the periciliary liquid (PCL) is optimally hydrated, thus acting as an efficient lubricant layer over which the mucus layer moves by ciliary force. When the hydration of the airway surface decreases, the mucus becomes hyperconcentrated, the PCL collapses, and the "thickened" mucus layer adheres to cell surfaces, causing plaque/plug formation. Mucus accumulation is a major contributing factor to the progression of chronic obstructive lung diseases such as cystic fibrosis (CF) and chronic bronchitis (CB). Mucus hydration is regulated by finely tuned mechanisms of luminal Cl- secretion and Na+ absorption with concomitant osmotically driven water flow. These activities are regulated by airway surface liquid (ASL) concentrations of adenosine and ATP, acting on airway epithelial A2B and P2Y2 receptors, respectively. The goal of this article is to provide an overview of our understanding of the role of purinergic receptors in the regulation of airway epithelial ion/fluid transport and the mechanisms of nucleotide release and metabolic activities that contribute to airway surface hydration in healthy and chronically obstructed airways.
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Affiliation(s)
- Eduardo R Lazarowski
- Marsico Lung Institute/Cystic Fibrosis Center, School of Medicine, University of North Carolina, Chapel Hill, NC, United States.
| | - Richard C Boucher
- Marsico Lung Institute/Cystic Fibrosis Center, School of Medicine, University of North Carolina, Chapel Hill, NC, United States
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26
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Przybyła GW, Szychowski KA, Gmiński J. Paracetamol - An old drug with new mechanisms of action. Clin Exp Pharmacol Physiol 2021; 48:3-19. [PMID: 32767405 DOI: 10.1111/1440-1681.13392] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/09/2020] [Accepted: 08/02/2020] [Indexed: 12/26/2022]
Abstract
Paracetamol (acetaminophen) is the most commonly used over-the-counter (OTC) drug in the world. Despite its popularity and use for many years, the safety of its application and its mechanism of action are still unclear. Currently, it is believed that paracetamol is a multidirectional drug and at least several metabolic pathways are involved in its analgesic and antipyretic action. The mechanism of paracetamol action consists in inhibition of cyclooxygenases (COX-1, COX-2, and COX-3) and involvement in the endocannabinoid system and serotonergic pathways. Additionally, paracetamol influences transient receptor potential (TRP) channels and voltage-gated Kv7 potassium channels and inhibits T-type Cav3.2 calcium channels. It also exerts an impact on L-arginine in the nitric oxide (NO) synthesis pathway. However, not all of these effects have been clearly confirmed. Therefore, the aim of our paper was to summarize the current state of knowledge of the mechanism of paracetamol action with special attention to its safety concerns.
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Affiliation(s)
| | - Konrad A Szychowski
- Department of Lifestyle Disorders and Regenerative Medicine, University of Information Technology and Management in Rzeszow, Rzeszow, Poland
| | - Jan Gmiński
- Department of Lifestyle Disorders and Regenerative Medicine, University of Information Technology and Management in Rzeszow, Rzeszow, Poland
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27
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Liao J, Wu Q, Qian C, Zhao N, Zhao Z, Lu K, Zhang S, Dong Q, Chen L, Li Q, Du Y. TRPV4 blockade suppresses atrial fibrillation in sterile pericarditis rats. JCI Insight 2020; 5:137528. [PMID: 33119551 PMCID: PMC7714415 DOI: 10.1172/jci.insight.137528] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 10/22/2020] [Indexed: 12/15/2022] Open
Abstract
Atrial fibrillation (AF) commonly occurs after surgery and is associated with atrial remodeling. TRPV4 is functionally expressed in the heart, and its activation affects cardiac structure and functions. We hypothesized that TRPV4 blockade alleviates atrial remodeling and reduces AF induction in sterile pericarditis (SP) rats. TRPV4 antagonist GSK2193874 or vehicle was orally administered 1 day before pericardiotomy. AF susceptibility and atrial function were assessed using in vivo electrophysiology, ex vivo optical mapping, patch clamp, and molecular biology on day 3 after surgery. TRPV4 expression increased in the atria of SP rats and patients with AF. GSK2193874 significantly reduced AF vulnerability in vivo and the frequency of atrial ectopy and AF with a reentrant pattern ex vivo. Mechanistically, GSK2193874 reversed the abnormal action potential duration (APD) prolongation in atrial myocytes through the regulation of voltage-gated K+ currents (IK); reduced the activation of atrial fibroblasts by inhibiting P38, AKT, and STAT3 pathways; and alleviated the infiltration of immune cells. Our results reveal that TRPV4 blockade prevented abnormal changes in atrial myocyte electrophysiology and ameliorated atrial fibrosis and inflammation in SP rats; therefore, it might be a promising strategy to treat AF, particularly postoperative AF. TRPV4 blockade prevents abnormal changes in atrial myocyte electrophysiology and ameliorated atrial fibrosis in rats and might be a promising strategy to treat atrial fibrillation.
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Affiliation(s)
- Jie Liao
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiongfeng Wu
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Cheng Qian
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ning Zhao
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhaoyang Zhao
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kai Lu
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shaoshao Zhang
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Dong
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lei Chen
- Department of Physiology, Nanjing Medical University, Nanjing, China
| | - Qince Li
- Harbin Institute of Technology, Nangang District, Harbin, China
| | - Yimei Du
- Department of Cardiology.,Research Center of Ion Channelopathy.,Institute of Cardiology, and.,Key Lab for Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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28
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Fernández-Carvajal A, González-Muñiz R, Fernández-Ballester G, Ferrer-Montiel A. Investigational drugs in early phase clinical trials targeting thermotransient receptor potential (thermoTRP) channels. Expert Opin Investig Drugs 2020; 29:1209-1222. [PMID: 32941080 DOI: 10.1080/13543784.2020.1825680] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Thermo transient receptor potential (thermoTRP) channels are some of the most intensely pursued therapeutic targets of the past decade. They are considered promising targets of numerous diseases including chronic pain and cancer. Modulators of these proteins, in particular TRPV1-4, TRPM8 and TRPA1, have reached clinical development, but none has been approved for clinical practice yet. AREAS COVERED The therapeutic potential of targeting thermoTRP channels is discussed. The discussion is centered on our experience and on available data found in SciFinder, PubMed, and ClinicalTrials.gov database from the past decade. This review focuses on the therapeutic progress concerning this family of channels, including strategies to improve their therapeutic index for overcoming adverse effects. EXPERT OPINION Although thermoTRPs are pivotal drug targets, translation to the clinic has faced two key problems, (i) unforeseen side effects in Phase I trials and, (ii) poor clinical efficacy in Phase II trials. Thus, there is a need for (i) an enhanced understanding of the physiological role of these channels in tissues and organs and (ii) the development of human-based pre-clinical models with higher clinical translation. Furthermore, progress in nanotechnology-based delivery strategies will positively impact thermoTRP human pharmacology.
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Affiliation(s)
- Asia Fernández-Carvajal
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
| | | | - Gregorio Fernández-Ballester
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
| | - Antonio Ferrer-Montiel
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
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29
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Hochstetler AE, Smith HM, Preston DC, Reed MM, Territo PR, Shim JW, Fulkerson D, Blazer-Yost BL. TRPV4 antagonists ameliorate ventriculomegaly in a rat model of hydrocephalus. JCI Insight 2020; 5:137646. [PMID: 32938829 PMCID: PMC7526552 DOI: 10.1172/jci.insight.137646] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 08/19/2020] [Indexed: 11/27/2022] Open
Abstract
Hydrocephalus is a serious condition that impacts patients of all ages. The standards of care are surgical options to divert, or inhibit production of, cerebrospinal fluid; to date, there are no effective pharmaceutical treatments, to our knowledge. The causes vary widely, but one commonality of this condition is aberrations in salt and fluid balance. We have used a genetic model of hydrocephalus to show that ventriculomegaly can be alleviated by inhibition of the transient receptor potential vanilloid 4, a channel that is activated by changes in osmotic balance, temperature, pressure and inflammatory mediators. The TRPV4 antagonists do not appear to have adverse effects on the overall health of the WT or hydrocephalic animals. Two distinct TRPV4 antagonists ameliorate ventriculomegaly in a genetic rat model of severe postnatal hydrocephalus, with no apparent adverse effects on animals.
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Affiliation(s)
| | - Hillary M Smith
- Department of Biology, Indiana University, Purdue University, Indianapolis, Indiana, USA
| | - Daniel C Preston
- Department of Biology, Indiana University, Purdue University, Indianapolis, Indiana, USA
| | - Makenna M Reed
- Department of Biology, Indiana University, Purdue University, Indianapolis, Indiana, USA
| | - Paul R Territo
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Joon W Shim
- Department of Biology, Indiana University, Purdue University, Indianapolis, Indiana, USA
| | | | - Bonnie L Blazer-Yost
- Department of Biology, Indiana University, Purdue University, Indianapolis, Indiana, USA
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30
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Dupont C, Novak K, Denman K, Myers JH, Sullivan JM, Walker PV, Brown NL, Ladle DR, Bogdanik L, Lutz CM, A Voss A, Sumner CJ, Rich MM. TRPV4 Antagonism Prevents Mechanically Induced Myotonia. Ann Neurol 2020; 88:297-308. [PMID: 32418267 PMCID: PMC7657963 DOI: 10.1002/ana.25780] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 04/27/2020] [Accepted: 05/07/2020] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Myotonia is caused by involuntary firing of skeletal muscle action potentials and causes debilitating stiffness. Current treatments are insufficiently efficacious and associated with side effects. Myotonia can be triggered by voluntary movement (electrically induced myotonia) or percussion (mechanically induced myotonia). Whether distinct molecular mechanisms underlie these triggers is unknown. Our goal was to identify ion channels involved in mechanically induced myotonia and to evaluate block of the channels involved as a novel approach to therapy. METHODS We developed a novel system to enable study of mechanically induced myotonia using both genetic and pharmacologic mouse models of myotonia congenita. We extended ex vivo studies of excitability to in vivo studies of muscle stiffness. RESULTS As previous work suggests activation of transient receptor potential vanilloid 4 (TRPV4) channels by mechanical stimuli in muscle, we examined the role of this cation channel. Mechanically induced myotonia was markedly suppressed in TRPV4-null muscles and in muscles treated with TRPV4 small molecule antagonists. The suppression of mechanically induced myotonia occurred without altering intrinsic muscle excitability, such that myotonia triggered by firing of action potentials (electrically induced myotonia) was unaffected. When injected intraperitoneally, TRPV4 antagonists lessened the severity of myotonia in vivo by approximately 80%. INTERPRETATION These data demonstrate that there are distinct molecular mechanisms triggering electrically induced and mechanically induced myotonia. Our data indicates that activation of TRPV4 during muscle contraction plays an important role in triggering myotonia in vivo. Elimination of mechanically induced myotonia by TRPV4 inhibition offers a new approach to treating myotonia. ANN NEUROL 2020;88:297-308.
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Affiliation(s)
- Chris Dupont
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - Kevin Novak
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - Kirsten Denman
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - Jessica H Myers
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - Jeremy M Sullivan
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Phillip V Walker
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - Nicklaus L Brown
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | - David R Ladle
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
| | | | | | - Andrew A Voss
- Department of Biology, Wright State University, Dayton, OH, USA
| | - Charlotte J Sumner
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mark M Rich
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, OH, USA
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31
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TRPV4 Increases the Expression of Tight Junction Protein-Encoding Genes via XBP1 in Mammary Epithelial Cells. Animals (Basel) 2020; 10:ani10071174. [PMID: 32664312 PMCID: PMC7401603 DOI: 10.3390/ani10071174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 12/23/2022] Open
Abstract
Simple Summary Mammary glands are exocrine tissue, capable of secreting adequate amounts of milk protein during lactation. Each mammary gland is occupied by numerous alveoli. Each alveolus is composed of a single layer of mammary epithelial cells, adipose tissue, and ducts. Recent studies indicate that mild heat treatment of mammary epithelial cells at 39 °C has activated milk production. These results suggest that temperature may influence the physiological functions of mammary epithelial cells. In this study, we found that the temperature-sensitive transient receptor potential vanilloid 4 (TRPV4) was involved in the increase of β-casein and TJ protein-encoding gene expression in response to mild heat treatment. On the other hand, severe heat treatment (41 °C) reduced the cell viability. Moreover, the Trpv4 mRNA level was significantly increased at Day 15 of gestation when the mammary alveoli are formed. TRPV4 is activated not only by temperature but also by mechanical forces that guide mammary epithelial development in the normal mammary gland. Our data suggest that TRPV4 has a possible function in mammary gland development. Abstract Mild heat stress (39 °C–40 °C) can positively regulate cell proliferation and differentiation. Indeed, mild heat treatment at 39 °C enhances the less-permeable tight junctions (TJs) formation and milk production in mammary epithelial cells. However, the molecular mechanisms of this response have not yet been delineated. In this study, the involvement of temperature-sensitive transient receptor potential vanilloid 4 (TRPV4) in the increase of β-casein and TJ protein-encoding gene expression in response to mild heat treatment (39 °C) has been explored using HCll mouse mammary epithelial cells. Severe heat treatment (41 °C) induced the transcriptional level of Chop (C/EBP homologous protein; proapoptotic marker) and reduced the cell viability. It is speculated that the difference in unfolded protein response (UPR) gene expression upon stimulation at 39 °C vs. 41 °C controls cell survival vs. cell death. The accumulation of Trpv4 mRNA was significantly higher in 39 °C heat treatment cells. The β-casein, Zo-1 (zona occludens-1), Ocln (occludin), and Cldn3 (claudin 3) transcript levels were significantly increased in response to the addition of a selective TRPV4 channel agonist (GSK1016790A) at 37 °C. TRPV4 stimulation with GSK1016790A also increased the X-box-binding protein 1 splicing form (Xbp1s) at the transcript level. The increase in the mRNA levels of β-casein, Zo-1, Ocln, and Cldn3 in response to 39 °C heat treatment was suppressed by XBP1 knockdown. Moreover, the transcript level of Trpv4 was significantly increased at Day 15 of gestation, and its expression declined after 1 day of lactation. TRPV4 is activated not only by temperature but also by mechanical forces, such as cell stretching and shear stress, which guide mammary epithelial development in a normal mammary gland. These findings provide new insights of the possible function of TRPV4 in mammary gland development.
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Hu W, Ding Y, Li Q, shi R, He Y. Transient receptor potential vanilloid 4 channels as therapeutic targets in diabetes and diabetes-related complications. J Diabetes Investig 2020; 11:757-769. [PMID: 32129549 PMCID: PMC7378409 DOI: 10.1111/jdi.13244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/21/2020] [Accepted: 02/27/2020] [Indexed: 12/12/2022] Open
Abstract
With an estimated 425 million diabetes patients worldwide in 2019, type 2 diabetes has reached a pandemic proportion and represents a major unmet medical need. A key determinant of the development and progression of type 2 diabetes is pancreatic -cell dysfunction, including the loss of cell mass, the impairment of insulin biosynthesis and inadequate exocytosis. Recent studies have shown that transient receptor potential vanilloid 4 (TRPV4), a Ca2+ -permeable non-selective cation channel, is involved in -cell replication, insulin production and secretion. TRPV4 agonists have insulinotropic activity in pancreatic -cell lines, but the prolonged activation of TRPV4 leads to -cell dysfunction and death. In addition, TRPV4 is involved in a wide variety of pathophysiological activities, and has been reported to play an important role in diabetes-related complications, such as obesity, cardiovascular diseases, diabetic retinopathy, nephropathy and neuropathy. In a rodent type 2 diabetes model, Trpv4 agonists promote vasodilation and improve cardiovascular function, whereas Trpv4 antagonists reduce high-fat diet-induced obesity, insulin resistance, diabetic nephropathy, retinopathy and neuropathy. These findings raise interest in using TRPV4 as a therapeutic target for type 2 diabetes. In this review, we intend to summarize the latest findings regarding the role of TRPV4 in diabetes as well as diabetes-related conditions, and to evaluate its potential as a therapeutic target for diabetes and diabetes-related diseases.
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Affiliation(s)
- Wei Hu
- Department of Epidemiology and Medical StatisticsInstitute of Medical Systems BiologyGuangdong Medical UniversityDongguanChina
| | - Yuanlin Ding
- Department of Epidemiology and Medical StatisticsInstitute of Medical Systems BiologyGuangdong Medical UniversityDongguanChina
| | - Qingqing Li
- Department of Epidemiology and Medical StatisticsInstitute of Medical Systems BiologyGuangdong Medical UniversityDongguanChina
| | - Rou shi
- Department of Epidemiology and Medical StatisticsInstitute of Medical Systems BiologyGuangdong Medical UniversityDongguanChina
| | - Yuqing He
- Department of Epidemiology and Medical StatisticsInstitute of Medical Systems BiologyGuangdong Medical UniversityDongguanChina
- Liaobu HospitalGuangdong Medical UniversityDongguanChina
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Lawhorn BG, Brnardic EJ, Behm DJ. Recent advances in TRPV4 agonists and antagonists. Bioorg Med Chem Lett 2020; 30:127022. [PMID: 32063431 DOI: 10.1016/j.bmcl.2020.127022] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 02/05/2020] [Indexed: 01/03/2023]
Abstract
TRPV4 is a ubiquitously expressed, non-selective cation channel activated by a range of stimuli including hypotonicity, temperature, pH, stretch and endogenous ligands. Agents that modulate TRPV4 are sought as potential therapeutics for the treatment of many diseases including osteoarthritis, respiratory illnesses, gastrointestinal disorders, pain and congestive heart failure. In recent years, significant advances in TRPV4 drug discovery have been realized as at least seven novel TRPV4 agonist or antagonist templates were reported and the first selective TRPV4 antagonist was evaluated in early clinical trials.
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Affiliation(s)
- Brian G Lawhorn
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, Research, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, PA 19426, United States.
| | - Edward J Brnardic
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, Research, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, PA 19426, United States
| | - David J Behm
- Medicinal Chemistry, Medicine Design, and Early Development Leaders, Research, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, PA 19426, United States
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Nakagawa F, Higashi S, Ando E, Ohsumi T, Watanabe S, Takeuchi H. Modification of TRPV4 activity by acetaminophen. Heliyon 2020; 6:e03301. [PMID: 32051870 PMCID: PMC7002858 DOI: 10.1016/j.heliyon.2020.e03301] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 12/15/2019] [Accepted: 01/22/2020] [Indexed: 11/25/2022] Open
Abstract
N-Acetyl-p-aminophenol (APAP/acetaminophen) is a widely used analgesic/antipyretic with weaker inhibitory effects on cyclooxygenase compared to those of non-steroidal anti-inflammatory drugs. The effect of APAP is mediated by its metabolites, N-arachidonoyl-phenolamine and N-acetyl-p-benzoquinone imine, which activate transient receptor potential (TRP) channels, including TRP vanilloid 1 (TRPV1) and TRP ankyrin 1 (TRPA1) or cannabinoid receptor type 1. However, the exact molecular mechanism underlying the cellular actions of APAP remains unclear. Recently, we observed that APAP promotes cell migration through TRPV4; in this study, we examined the effect of APAP on Ca2+-channel activity of TRPV4. In the rat cell line PC12 expressing TRPV4, GSK1016790A (GSK), a TRPV4 agonist, stimulated an increase in [Ca2+]i; these effects were abrogated by HC-067047 treatment. This GSK-induced Ca2+ entry through TRPV4 was inhibited by APAP in a dose-dependent manner, whereas APAP alone did not affect [Ca2+]i. The specificity of the effect of APAP on TRPV4 was further confirmed using HeLa cells, which lack endogenous TRPV4 but stably express exogenous TRPV4 (HeLa-mTRPV4). GSK-induced [Ca2+]i elevation was only observed in HeLa-mTRPV4 cells compared to that in the control HeLa cells, indicating the specific action of GSK on TRPV4. APAP dose-dependently suppressed this GSK-induced Ca2+ entry in HeLa-mTRPV4. However, it is unlikely that the metabolites of APAP were involved in these effects as the reaction in this study was rapid. The results suggest that APAP suppresses the newly identified target TRPV4 without being metabolized and exerts antipyretic/analgesic and/or other effects on TRPV4-related phenomena in the body. The effect of APAP on TRPV4 was opposite to that on TRPV1 or TRPA1, as the latter is activated by APAP.
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Affiliation(s)
- Fumio Nakagawa
- Division of Dental Anesthesiology, Department of Control of Physical Functions, Kyushu Dental University, Kitakyushu, 803-8580, Japan
- Division of Applied Pharmacology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, 803-8580, Japan
| | - Sen Higashi
- Division of Applied Pharmacology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, 803-8580, Japan
| | - Eika Ando
- Division of Dental Anesthesiology, Department of Control of Physical Functions, Kyushu Dental University, Kitakyushu, 803-8580, Japan
| | - Tomoko Ohsumi
- Division of Applied Pharmacology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, 803-8580, Japan
| | - Seiji Watanabe
- Division of Dental Anesthesiology, Department of Control of Physical Functions, Kyushu Dental University, Kitakyushu, 803-8580, Japan
| | - Hiroshi Takeuchi
- Division of Applied Pharmacology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, 803-8580, Japan
- Corresponding author.
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Chen YL, Sonkusare SK. Endothelial TRPV4 channels and vasodilator reactivity. CURRENT TOPICS IN MEMBRANES 2020; 85:89-117. [PMID: 32402646 PMCID: PMC9748413 DOI: 10.1016/bs.ctm.2020.01.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Transient receptor potential vanilloid 4 (TRPV4) ion channels on the endothelial cell membrane are widely regarded as a crucial Ca2+ influx pathway that promotes endothelium-dependent vasodilation. The downstream vasodilatory targets of endothelial TRPV4 channels vary among different vascular beds, potentially contributing to endothelial cell heterogeneity. Although numerous studies have examined the role of endothelial TRPV4 channels using specific pharmacological tools over the past decade, their physiological significance remains unclear, mainly due to a lack of endothelium-specific knockouts. Moreover, the loss of endothelium-dependent vasodilation is a significant contributor to vascular dysfunction in cardiovascular disease. The activity of endothelial TRPV4 channels is impaired in cardiovascular disease; therefore, strategies targeting the mechanisms that reduce endothelial TRPV4 channel activity may restore vascular function and provide therapeutic benefit. In this chapter, we discuss endothelial TRPV4 channel-dependent signaling mechanisms, the heterogeneity in endogenous activators and targets of endothelial TRPV4 channels, and the role of endothelial TRPV4 channels in the pathogenesis of cardiovascular diseases. We also discuss potentially interesting future research directions that may provide novel insights into the physiological and pathological roles of endothelial TRPV4 channels.
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Affiliation(s)
- Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, United States
| | - Swapnil K. Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, United States,Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, United States,Corresponding author:
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Hu F, Zhao Y, Hui Z, Xing F, Yang J, Lee I, Zhang X, Pan L, Xu J. Regulation of intracellular Ca2+/CaMKII signaling by TRPV4 membrane translocation during osteoblastic differentiation. BIOPHYSICS REPORTS 2019. [DOI: 10.1007/s41048-019-00100-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AbstractBone constantly remodels between resorption by osteoclasts and formation by osteoblasts; therefore the functions of osteoblasts are pivotal for maintaining homeostasis of bone mass. Transient receptor potential vanilloid 4 (TRPV4), a type of mechanosensitive channel, has been reported to be a key regulator in bone remodeling. However, the relationship between TRPV4 and osteoblast function remains largely elusive. Only little is known about the spatial distribution change of TRPV4 during osteoblastic differentiation and related signal events. Based on three-dimensional super-resolution microscopy, our results clearly showed a different distribution of TRPV4 in undifferentiated and differentiated osteoblasts, which reflected the plasma membrane translocation of TRPV4 along with prolonged differentiation. GSK1016790A (GSK101), the most potent agonist of TRPV4, triggered rapid calcium entry and calmodulin-dependent protein kinase II (CaMKII) phosphorylation via TRPV4 activation in a differentiation-dependent manner, indicating that the abundance of TRPV4 at the cell surface resulting from differentiation may be related to the modulation of Ca2+ response and CaMKII activity. These data provide compelling evidences for the plasma membrane translocation of TRPV4 during osteoblastic differentiation as well as demonstrate the regulation of downstream Ca2+/CaMKII signaling.
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Martínez-Juárez A, Moreno-Mendoza N. Mechanisms related to sexual determination by temperature in reptiles. J Therm Biol 2019; 85:102400. [PMID: 31657741 DOI: 10.1016/j.jtherbio.2019.102400] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 08/12/2019] [Accepted: 08/21/2019] [Indexed: 01/08/2023]
Abstract
A number of strategies have emerged that appear to relate to the evolution of mechanisms for sexual determination in vertebrates, among which are genetic sex determination caused by sex chromosomes and environmental sex determination, where environmental factors influence the phenotype of the sex of an individual. Within the reptile group, some orders such as: Chelonia, Crocodylia, Squamata and Rhynchocephalia, manifest one of the most intriguing and exciting environmental sexual determination mechanisms that exists, comprising temperature-dependent sex determination (TSD), where the temperature of incubation that the embryo experiences during its development is fundamental to establishing the sex of the individual. This makes them an excellent model for the study of sexual determination at the molecular, cellular and physiological level, as well as in terms of their implications at an evolutionary and ecological level. There are different hypotheses concerning how this process is triggered and this review aims to describe any new contributions to particular TSD hypotheses, analyzing them from the "eco-evo-devo" perspective.
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Affiliation(s)
- Adriana Martínez-Juárez
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado Postal 70228 México, D.F. 04510, Mexico
| | - Norma Moreno-Mendoza
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado Postal 70228 México, D.F. 04510, Mexico.
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The selective TRPV4 channel antagonist HC-067047 attenuates mechanical allodynia in diabetic mice. Eur J Pharmacol 2019; 856:172408. [DOI: 10.1016/j.ejphar.2019.172408] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 12/15/2022]
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Blockade of Transient Receptor Potential Vanilloid 4 Enhances Antioxidation after Myocardial Ischemia/Reperfusion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7283683. [PMID: 31308876 PMCID: PMC6604422 DOI: 10.1155/2019/7283683] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/07/2019] [Accepted: 05/16/2019] [Indexed: 02/06/2023]
Abstract
Antioxidative stress provides a cardioprotective effect during myocardial ischemia/reperfusion (I/R). Previous research has demonstrated that the blockade of transient receptor potential vanilloid 4 (TRPV4) attenuates myocardial I/R injury. However, the underlying mechanism remains unclear. The current study is aimed at investigating the antioxidative activity of TRPV4 inhibition and elucidating the underlying mechanisms in vitro and ex vivo. We found that the inhibiting TRPV4 by the selective TRPV4 blocker HC-067047 or specific TRPV4-siRNA significantly reduces reactive oxygen species (ROS) and methane dicarboxylic aldehyde (MDA) levels in H9C2 cells exposed to hypoxia/reoxygenation (H/R). Meanwhile, the activity of antioxidative enzymes, particularly superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), is enhanced. Furthermore, after H/R, HC-067047 treatment increases the expression of P-Akt and the translocation of nuclear factor E2-related factor 2 (Nrf2) and related antioxidant response element (ARE) mainly including SOD, GSH-Px, and catalase (CAT). LY294002, an Akt inhibitor, suppresses HC-067047 and specific TRPV4-siRNA-induced Nrf2 expression and its nuclear accumulation. Nrf2 siRNA attenuates HC-067047 and specific TRPV4-siRNA-induced ARE expression. In addition, treatment with LY294002 or Nrf2 siRNA significantly attenuates the antioxidant and anti-injury effects of HC-067047 in vitro. Finally, in experiments on isolated rat hearts, we confirmed the antioxidative stress roles of TRPV4 inhibition during myocardial I/R and the application of exogenous H2O2. In conclusion, the inhibition of TRPV4 exerts cardioprotective effects through enhancing antioxidative enzyme activity and expressions via the Akt/Nrf2/ARE pathway.
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TRP Channels as Lower Urinary Tract Sensory Targets. Med Sci (Basel) 2019; 7:medsci7050067. [PMID: 31121962 PMCID: PMC6572419 DOI: 10.3390/medsci7050067] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/19/2019] [Accepted: 05/20/2019] [Indexed: 12/13/2022] Open
Abstract
Several members of the transient receptor potential (TRP) superfamily, including TRPV1, TRPV2, TRPV4, TRM4, TRPM8 and TRPA1, are expressed in the lower urinary tract (LUT), not only in neuronal fibers innervating the bladder and urethra, but also in the urothelial and muscular layers of the bladder and urethral walls. In the LUT, TRP channels are mainly involved in nociception and mechanosensory transduction. Animal studies have suggested the therapeutic potential of several TRP channels for the treatment of both bladder over- and underactivity and bladder pain disorders,; however translation of this finding to clinical application has been slow and the involvement of these channels in normal human bladder function, and in various pathologic states have not been established. The development of selective TRP channel agonists and antagonists is ongoing and the use of such agents can be expected to offer new and important information concerning both normal physiological functions and possible therapeutic applications.
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Kelly GT, Faraj R, Zhang Y, Maltepe E, Fineman JR, Black SM, Wang T. Pulmonary Endothelial Mechanical Sensing and Signaling, a Story of Focal Adhesions and Integrins in Ventilator Induced Lung Injury. Front Physiol 2019; 10:511. [PMID: 31105595 PMCID: PMC6498899 DOI: 10.3389/fphys.2019.00511] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 04/11/2019] [Indexed: 12/17/2022] Open
Abstract
Patients with critical illness such as acute lung injury often undergo mechanical ventilation in the intensive care unit. Though lifesaving in many instances, mechanical ventilation often results in ventilator induced lung injury (VILI), characterized by overdistension of lung tissue leading to release of edemagenic agents, which further damage the lung and contribute to the mortality and progression of pulmonary inflammation. The endothelium is particularly sensitive, as VILI associated mechanical stress results in endothelial cytoskeletal rearrangement, stress fiber formation, and integrity loss. At the heart of these changes are integrin tethered focal adhesions (FAs) which participate in mechanosensing, structure, and signaling. Here, we present the known roles of FA proteins including c-Src, talin, FAK, paxillin, vinculin, and integrins in the sensing and response to cyclic stretch and VILI associated stress. Attention is given to how stretch is propagated from the extracellular matrix through integrins to talin and other FA proteins, as well as signaling cascades that include FA proteins, leading to stress fiber formation and other cellular responses. This unifying picture of FAs aids our understanding in an effort to prevent and treat VILI.
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Affiliation(s)
- Gabriel T Kelly
- Department of Internal Medicine, College of Medicine Phoenix, The University of Arizona, Phoenix, AZ, United States
| | - Reem Faraj
- Department of Internal Medicine, College of Medicine Phoenix, The University of Arizona, Phoenix, AZ, United States
| | - Yao Zhang
- Department of Internal Medicine, College of Medicine Phoenix, The University of Arizona, Phoenix, AZ, United States
| | - Emin Maltepe
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
| | - Jeffrey R Fineman
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
| | - Stephen M Black
- Department of Medicine, College of Medicine, The University of Arizona, Tucson, AZ, United States
| | - Ting Wang
- Department of Internal Medicine, College of Medicine Phoenix, The University of Arizona, Phoenix, AZ, United States
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Agonist-evoked endothelial Ca 2+ signalling microdomains. Curr Opin Pharmacol 2019; 45:8-15. [PMID: 30986569 DOI: 10.1016/j.coph.2019.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/03/2019] [Accepted: 03/15/2019] [Indexed: 01/14/2023]
Abstract
Localized, oscillating Ca2+ signals have been identified in discrete microdomains of vascular endothelial cells. At myoendothelial contacts (between endothelial and smooth muscle cells), both endothelial Ca2+ pulsars (IP3-mediated release of intracellular Ca2+) and Ca2+ sparklets (extracellular Ca2+ entry via TRP channels) contribute to endothelium-dependent hyperpolarization of smooth muscle, vasodilation, and feedback control of vasoconstriction. Ca2+ sparklets occurring at close-contact domains between endothelial cells are possibly involved in conducted hyperpolarization and spreading vasodilation in arterial networks. This review summarizes these Ca2+ signalling phenomena, examines the proposed mechanisms leading to their generation by G-protein-coupled receptor agonists, and explores the proposed physiological roles of these localized and specialized Ca2+ signals.
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Baratchi S, Keov P, Darby WG, Lai A, Khoshmanesh K, Thurgood P, Vahidi P, Ejendal K, McIntyre P. The TRPV4 Agonist GSK1016790A Regulates the Membrane Expression of TRPV4 Channels. Front Pharmacol 2019; 10:6. [PMID: 30728775 PMCID: PMC6351496 DOI: 10.3389/fphar.2019.00006] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/04/2019] [Indexed: 02/05/2023] Open
Abstract
TRPV4 is a non-selective cation channel that tunes the function of different tissues including the vascular endothelium, lung, chondrocytes, and neurons. GSK1016790A is the selective and potent agonist of TRPV4 and a pharmacological tool that is used to study the TRPV4 physiological function in vitro and in vivo. It remains unknown how the sensitivity of TRPV4 to this agonist is regulated. The spatial and temporal dynamics of receptors are the major determinants of cellular responses to stimuli. Membrane translocation has been shown to control the response of several members of the transient receptor potential (TRP) family of ion channels to different stimuli. Here, we show that TRPV4 stimulation with GSK1016790A caused an increase in [Ca2+]i that is stable for a few minutes. Single molecule analysis of TRPV4 channels showed that the density of TRPV4 at the plasma membrane is controlled through two modes of membrane trafficking, complete, and partial vesicular fusion. Further, we show that the density of TRPV4 at the plasma membrane decreased within 20 min, as they translocate to the recycling endosomes and that the surface density is dependent on the release of calcium from the intracellular stores and is controlled via a PI3K, PKC, and RhoA signaling pathway.
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Affiliation(s)
- Sara Baratchi
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | - Peter Keov
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia.,Molecular Pharmacology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St Vincent's Clinical School, University of New South Wales, Darlinghurst, NSW, Australia
| | - William G Darby
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | - Austin Lai
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | | | - Peter Thurgood
- School of Engineering, RMIT University, Melbourne, VIC, Australia
| | - Parisa Vahidi
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | - Karin Ejendal
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States
| | - Peter McIntyre
- School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
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Mihara H, Uchida K, Koizumi S, Moriyama Y. Involvement of VNUT-exocytosis in transient receptor potential vanilloid 4-dependent ATP release from gastrointestinal epithelium. PLoS One 2018; 13:e0206276. [PMID: 30365528 PMCID: PMC6203352 DOI: 10.1371/journal.pone.0206276] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 10/10/2018] [Indexed: 01/25/2023] Open
Abstract
Adenosine triphosphate (ATP) modulates mechanosensitive vagal afferent nerves in the gastrointestinal tract. ATP is stored in secretory vesicles via the ATP transporter VNUT. Recently, the bisphosphate clodronate was reported to inhibit VNUT and was suggested to be a safe potent therapeutic option for chronic pain. Transient receptor potential vanilloid 4 (TRPV4) is activated by mechanical stimuli and some epoxyeicosatrienoic acids and becomes sensitized under inflammatory conditions. We have previously reported that TRPV4 and VNUT are expressed in mouse esophageal keratinocytes and that TRPV4 activation induces ATP release in gastric epithelial cells. Here we show the expression of TRPV4 and VNUT in normal human gastrointestinal cell derived cell lines (GES-1 and CCD 841) and in tissues from normal and VNUT-KO mice. TRPV4 agonists (GSK101 or 8,9-EET) induced an increase in cytosolic Ca2+ and/or current responses in mouse primary colonic epithelial cells and CCD 841 cells, but not in cells isolated from TRPV4-KO mice. TRPV4 agonists (GSK101 or 5.6-EET) also induced ATP release in GES-1 and CCD 841 cells, which could be blocked by the VNUT inhibitor, clodronate. Thus, VNUT inhibition with clodronate could represent a novel therapeutic option for visceral pain.
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Affiliation(s)
- Hiroshi Mihara
- Center for Medical Education and Career Development, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
- Department of Gastroenterology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
- * E-mail:
| | - Kunitoshi Uchida
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan
| | - Schuichi Koizumi
- Department of Neuropharmacology, University of Yamanashi, Yamanashi, Japan
| | - Yoshinori Moriyama
- Department of Membrane Biochemistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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Pivonkova H, Hermanova Z, Kirdajova D, Awadova T, Malinsky J, Valihrach L, Zucha D, Kubista M, Galisova A, Jirak D, Anderova M. The Contribution of TRPV4 Channels to Astrocyte Volume Regulation and Brain Edema Formation. Neuroscience 2018; 394:127-143. [PMID: 30367945 DOI: 10.1016/j.neuroscience.2018.10.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 10/12/2018] [Accepted: 10/15/2018] [Indexed: 12/01/2022]
Abstract
Transient receptor potential vanilloid type 4 (TRPV4) channels are involved in astrocyte volume regulation; however, only limited data exist about its mechanism in astrocytes in situ. We performed middle cerebral artery occlusion in adult mice, where we found twice larger edema 1 day after the insult in trpv4-/- mice compared to the controls, which was quantified using magnetic resonance imaging. This result suggests disrupted volume regulation in the brain cells in trpv4-/- mice leading to increased edema formation. The aim of our study was to elucidate whether TRPV4 channel-based volume regulation occurs in astrocytes in situ and whether the disrupted volume regulation in trpv4-/- mice might lead to higher edema formation after brain ischemia. For our experiments, we used trpv4-/- mice crossed with transgenic mice expressing enhanced green fluorescent protein (EGFP) under the control of the glial fibrillary acidic protein promoter, which leads to astrocyte visualization by EGFP expression. For quantification of astrocyte volume changes, we used two-dimensional (2D) and three-dimensional (3D) morphometrical approaches and a quantification algorithm based on fluorescence intensity changes during volume alterations induced by hypotonicity or by oxygen-glucose deprivation. In contrast to in vitro experiments, we found little evidence of the contribution of TRPV4 channels to volume regulation in astrocytes in situ in adult mice. Moreover, we only found a rare expression of TRPV4 channels in adult mouse astrocytes. Our data suggest that TRPV4 channels are not involved in astrocyte volume regulation in situ; however, they play a protective role during the ischemia-induced brain edema formation.
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Affiliation(s)
- Helena Pivonkova
- Department of Cellular Neurophysiology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Zuzana Hermanova
- Department of Cellular Neurophysiology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Denisa Kirdajova
- Department of Cellular Neurophysiology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Thuraya Awadova
- Department of Microscopy, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Malinsky
- Department of Microscopy, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Lukas Valihrach
- Laboratory of Gene Expression, Institute of Biotechnology, Czech Academy of Sciences, Prague, Czech Republic
| | - Daniel Zucha
- Laboratory of Gene Expression, Institute of Biotechnology, Czech Academy of Sciences, Prague, Czech Republic
| | - Mikael Kubista
- Laboratory of Gene Expression, Institute of Biotechnology, Czech Academy of Sciences, Prague, Czech Republic; TATAA Biocenter AB, Gothenburg 411 03, Sweden
| | - Andrea Galisova
- Department of Radiodiagnostic and Interventional Radiology, Institute of Clinical and Experimental Medicine, Prague, Czech Republic
| | - Daniel Jirak
- Department of Radiodiagnostic and Interventional Radiology, Institute of Clinical and Experimental Medicine, Prague, Czech Republic; Institute of Biophysics and Informatics, 1st Medicine Faculty, Charles University, Prague, Czech Republic
| | - Miroslava Anderova
- Department of Cellular Neurophysiology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic; Department of Neuroscience, 2nd Medical Faculty, Charles University, Prague, Czech Republic.
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Wang T, Azeddine B, Mah W, Harvey EJ, Rosenblatt D, Séguin C. Osteonecrosis of the femoral head: genetic basis. INTERNATIONAL ORTHOPAEDICS 2018; 43:519-530. [PMID: 30328481 DOI: 10.1007/s00264-018-4172-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 09/18/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE Genetic factors and hereditary forms of osteonecrosis of the femoral head (ONFH) have been elucidated through genetic association studies. The significance of these cases is that they suggest an alternative hypothesis to the development of the disease. This review presents a summary of single nucleotide polymorphisms (SNPs) and other genetic mutation variations found in association with ONFH, including our recent identification of a novel mutation in the transient receptor potential vanilloid 4 (TRPV4) gene in association with inherited ONFH. The purpose of this review is to consolidate and categorize genetic linkages according to physiological pathways. METHODS A systematic review of literature from PubMed and Google Scholar was undertaken with a focus on genetic linkages and hereditary case studies of the disease. Recent genetic analysis studies published after 2007 were the focus of genetic linkages in non-hereditary cases. RESULTS The summary of these genetic findings identifies biological processes believed to be involved in the development of ONFH, which include circulation, steroid metabolism, immunity, and the regulation of bone formation. CONCLUSION Taken together, these associations may lead to new pathways of bone repair and remodeling while opening new avenues for therapeutic targets. Knowledge of genetic variations could help identify individuals considered to be at higher risk of developing ONFH and prevent the multiple hit effect.
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Affiliation(s)
- Tracy Wang
- Vascular Biology Research lab, Research Institute (RI) McGill University Health Centre, C9 Montreal General Hospital, 1650 Cedar Avenue, Montreal, QC, H3G 1A4, Canada.
| | - Bouziane Azeddine
- Vascular Biology Research lab, Research Institute (RI) McGill University Health Centre, C9 Montreal General Hospital, 1650 Cedar Avenue, Montreal, QC, H3G 1A4, Canada
| | - Wayne Mah
- Vascular Biology Research lab, Research Institute (RI) McGill University Health Centre, C9 Montreal General Hospital, 1650 Cedar Avenue, Montreal, QC, H3G 1A4, Canada
| | - Edward J Harvey
- Department Surgery, Division Orthopaedic Surgery, McGill University Health Centre, B5 Montreal General Hospital, 1650 Cedar Avenue, Montreal, QC, H3G 1A4, Canada
| | - David Rosenblatt
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Chantal Séguin
- Vascular Biology Research lab, Research Institute (RI) McGill University Health Centre, C9 Montreal General Hospital, 1650 Cedar Avenue, Montreal, QC, H3G 1A4, Canada. .,Department of Medicine, Division of Hematology and Oncology, McGill University Health Centre, Montreal, Quebec, H4A 3J1, Canada. .,Glen Site, Cedars Cancer Centre, McGill University Health Centre, 1001 Décarie Blvd., room D02.7519, Montreal, Quebec, H4A 3J1, Canada.
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Preston D, Simpson S, Halm D, Hochstetler A, Schwerk C, Schroten H, Blazer-Yost BL. Activation of TRPV4 stimulates transepithelial ion flux in a porcine choroid plexus cell line. Am J Physiol Cell Physiol 2018; 315:C357-C366. [PMID: 29791207 DOI: 10.1152/ajpcell.00312.2017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The choroid plexus (CP) epithelium plays a major role in the production of cerebrospinal fluid (CSF). A polarized cell line, the porcine CP-Riems (PCP-R) line, which exhibits many of the characteristics of the native epithelium, was used to study the effect of activation of the transient receptor potential vanilloid 4 (TRPV4) cation channel found in the PCP-R cells as well as in the native epithelium. Ussing-style electrophysiological experiments showed that activation of TRPV4 with a specific agonist, GSK1016790A, resulted in an immediate increase in both transepithelial ion flux and conductance. These changes were inhibited by either of two distinct antagonists, HC067047 or RN1734. The change in conductance was reversible and did not involve disruption of epithelial junctional complexes. Activation of TRPV4 results in Ca2+ influx, therefore, we examined whether the electrophysiological changes were the result of secondary activation of Ca2+-sensitive channels. PCP-R cells contain two Ca2+-activated K+ channels, the small conductance 2 (SK2) and the intermediate conductance (IK) channels. Based on inhibitor studies, the former is not involved in the TRPV4-mediated electrophysiological changes whereas one of the three isoforms of the IK channel (KCNN4c) may play a role in the apical secretion of K+. Blocking the activity of this IK isoform with TRAM34 inhibited the TRPV4-mediated change in net transepithelial ion flux and the increased conductance. These studies implicate TRPV4 as a hub protein in the control of CSF production through stimulation by multiple effectors resulting in transepithelial ion and subsequent water movement.
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Affiliation(s)
- Daniel Preston
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana
| | - Stefanie Simpson
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana
| | - Dan Halm
- Department of Neuroscience, Cell Biology, and Physiology, Wright State University , Dayton, Ohio
| | - Alexandra Hochstetler
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana
| | - Christian Schwerk
- Mannheim Medical Faculty, University of Heidelberg, Children's Hospital , Mannheim , Germany
| | - Horst Schroten
- Mannheim Medical Faculty, University of Heidelberg, Children's Hospital , Mannheim , Germany
| | - Bonnie L Blazer-Yost
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana
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Martínez-Juárez A, López-Luna MA, Porras-Gómez TJ, Moreno-Mendoza N. Expression of theSox9,Foxl2,Vasa, andTRPV4genes in the ovaries and testes of the Morelet's crocodile,Crocodylus moreletii. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2018; 330:148-164. [DOI: 10.1002/jez.b.22799] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 02/12/2018] [Accepted: 03/09/2018] [Indexed: 01/20/2023]
Affiliation(s)
- Adriana Martínez-Juárez
- Departamento de Biología Celular y Fisiología; Instituto de Investigaciones Biomédicas; UNAM; Mexico Mexico
| | - Marco A. López-Luna
- División Académica de Ciencias Biológicas; Universidad Juárez Autónoma de Tabasco; Villahermosa Tabasco; Mexico Mexico
| | - Tania J. Porras-Gómez
- Departamento de Biología Celular y Fisiología; Instituto de Investigaciones Biomédicas; UNAM; Mexico Mexico
| | - Norma Moreno-Mendoza
- Departamento de Biología Celular y Fisiología; Instituto de Investigaciones Biomédicas; UNAM; Mexico Mexico
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Behringer EJ. Calcium and electrical signaling in arterial endothelial tubes: New insights into cellular physiology and cardiovascular function. Microcirculation 2018; 24. [PMID: 27801542 DOI: 10.1111/micc.12328] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/25/2016] [Indexed: 12/23/2022]
Abstract
The integral role of the endothelium during the coordination of blood flow throughout vascular resistance networks has been recognized for several decades now. Early examination of the distinct anatomy and physiology of the endothelium as a signaling conduit along the vascular wall has prompted development and application of an intact endothelial "tube" study model isolated from rodent skeletal muscle resistance arteries. Vasodilatory signals such as increased endothelial cell (EC) Ca2+ ([Ca2+ ]i ) and hyperpolarization take place in single ECs while shared between electrically coupled ECs through gap junctions up to distances of millimeters (≥2 mm). The small- and intermediate-conductance Ca2+ activated K+ (SKCa /IKCa or KCa 2.3/KCa 3.1) channels function at the interface of Ca2+ signaling and hyperpolarization; a bidirectional relationship whereby increases in [Ca2+ ]i activate SKCa /IKCa channels to produce hyperpolarization and vice versa. Further, the spatial domain of hyperpolarization among electrically coupled ECs can be finely tuned via incremental modulation of SKCa /IKCa channels to balance the strength of local and conducted electrical signals underlying vasomotor activity. Multifunctional properties of the voltage-insensitive SKCa /IKCa channels of resistance artery endothelium may be employed for therapy during the aging process and development of vascular disease.
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Affiliation(s)
- Erik J Behringer
- Department of Basic Sciences, Loma Linda University, Loma Linda, CA, USA
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Servin-Vences MR, Richardson J, Lewin GR, Poole K. Mechanoelectrical transduction in chondrocytes. Clin Exp Pharmacol Physiol 2018; 45:481-488. [PMID: 29359488 DOI: 10.1111/1440-1681.12917] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 12/20/2017] [Accepted: 01/09/2018] [Indexed: 11/29/2022]
Abstract
Cartilage tissue lines the joints of mammals, helping to lubricate joint movement and distribute mechanical loads. This tissue is comprised of isolated cells known as chondrocytes which are embedded in an extracellular matrix. Chondrocytes produce and maintain the cartilage by sensing and responding to changing mechanical loads. Mechanosensitive ion channels have been implicated in chondrocyte mechanotransduction and recent studies have shown that both PIEZO1 and TRPV4 can be activated by mechanical stimuli in these cells. The 2 channels mediate separate but overlapping mechanoelectrical transduction pathways, PIEZO1 in response to stretch and substrate deflections and TRPV4 in response to substrate deflections alone. These distinct pathways of mechanoelectrical transduction suggest a mechanism by which chondrocytes can distinguish between different stimuli that arise in their complex mechanical environment.
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Affiliation(s)
| | - Jessica Richardson
- School of Medical Sciences, EMBL Australia node for Single Molecule Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Gary R Lewin
- Max Delbruck Center for Molecular Medicine, Department Neuroscience, Berlin-Buch, Germany
| | - Kate Poole
- School of Medical Sciences, EMBL Australia node for Single Molecule Sciences, University of New South Wales, Sydney, NSW, Australia
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