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Tytti K, Sanna K, Carla G, Jonatan P, Kaisa R, Sari T. Mechanosensitive TRPV4 channel guides maturation and organization of the bilayered mammary epithelium. Sci Rep 2024; 14:6774. [PMID: 38514727 PMCID: PMC10957991 DOI: 10.1038/s41598-024-57346-x] [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: 07/03/2023] [Accepted: 03/18/2024] [Indexed: 03/23/2024] Open
Abstract
Biophysical cues from the cell microenvironment are detected by mechanosensitive components at the cell surface. Such machineries convert physical information into biochemical signaling cascades within cells, subsequently leading to various cellular responses in a stimulus-dependent manner. At the surface of extracellular environment and cell cytoplasm exist several ion channel families that are activated by mechanical signals to direct intracellular events. One of such channel is formed by transient receptor potential cation channel subfamily V member, TRPV4 that is known to act as a mechanosensor in wide variaty of tissues and control ion-influx in a spatio-temporal way. Here we report that TRPV4 is prominently expressed in the stem/progenitor cell populations of the mammary epithelium and seems important for the lineage-specific differentiation, consequently affecting mechanical features of the mature mammary epithelium. This was evident by the lack of several markers for mature myoepithelial and luminal epithelial cells in TRPV4-depleted cell lines. Interestingly, TRPV4 expression is controlled in a tension-dependent manner and it also impacts differentation process dependently on the stiffness of the microenvironment. Furthermore, such cells in a 3D compartment were disabled to maintain normal mammosphere structures and displayed abnormal lumen formation, size of the structures and disrupted cellular junctions. Mechanosensitive TRPV4 channel therefore act as critical player in the homeostasis of normal mammary epithelium through sensing the physical environment and guiding accordingly differentiation and structural organization of the bilayered mammary epithelium.
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Affiliation(s)
- Kärki Tytti
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | - Koskimäki Sanna
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Guenther Carla
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Pirhonen Jonatan
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Rajakylä Kaisa
- School of Social Services and Health Care, Tampere University of Applied Sciences, Tampere, Finland
| | - Tojkander Sari
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
- Tampere Institute for Advanced Study, Tampere University, Tampere, Finland.
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Sumioka T, Iwanishi H, Yasuda S, Ichikawa K, Miyazima M, Kokado M, Okada Y, Saika S. Loss of TRPV4 Cation Channel Inhibition of Macrophage Infiltration and Neovascularization in a Mouse Cornea. J Transl Med 2023; 103:100061. [PMID: 36801638 DOI: 10.1016/j.labinv.2022.100061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
Corneal injury-associated inflammation could induce inward-growing neovascularization from the periphery of the tissue. Such neovascularization could cause stromal opacification and curvature disturbance, and both potentially impair visual function. In this study, we determined the effects of the loss of transient receptor potential vanilloid 4 (TRPV4) expression on the development of neovascularization in the corneal stroma in mice by producing a cauterization injury in the central area of the cornea. New vessels were immunohistochemically labeled with anti-TRPV4 antibodies. TRPV4 gene knockout suppressed the growth of such CD31-labeled neovascularization in association with the suppression of infiltration of macrophages and tissue messenger RNA expression of the vascular endothelial cell growth factor A level. Treatment of cultured vascular endothelial cells with supplementation of HC-067047 (0.1 μM, 1 μM, or 10 μM), a TRPV4 antagonist, attenuated the formation of a tube-like structure with sulforaphane (15 μM, for positive control) that modeled the new vessel formation. Therefore, the TRPV4 signal is involved in injury-induced macrophagic inflammation and neovascularization activity by vascular endothelial cells in a mouse corneal stroma. TRPV4 could be a therapeutic target to prevent unfavorable postinjury neovascularization in the cornea.
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Affiliation(s)
- Takayoshi Sumioka
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan.
| | - Hiroki Iwanishi
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
| | - Shingo Yasuda
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan; School of Optometry, Indiana University, Bloomington, Indiana
| | - Kana Ichikawa
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
| | - Masayasu Miyazima
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
| | - Masahide Kokado
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
| | - Yuka Okada
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
| | - Shizuya Saika
- Department of Ophthalmology, Wakayama Medical University, Kimiidera, Wakayama, Japan
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Spekker E, Körtési T, Vécsei L. TRP Channels: Recent Development in Translational Research and Potential Therapeutic Targets in Migraine. Int J Mol Sci 2022; 24:ijms24010700. [PMID: 36614146 PMCID: PMC9820749 DOI: 10.3390/ijms24010700] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/22/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023] Open
Abstract
Migraine is a chronic neurological disorder that affects approximately 12% of the population. The cause of migraine headaches is not yet known, however, when the trigeminal system is activated, neuropeptides such as calcitonin gene-related peptide (CGRP) and substance P (SP) are released, which cause neurogenic inflammation and sensitization. Advances in the understanding of migraine pathophysiology have identified new potential pharmacological targets. In recent years, transient receptor potential (TRP) channels have been the focus of attention in the pathophysiology of various pain disorders, including primary headaches. Genetic and pharmacological data suggest the role of TRP channels in pain sensation and the activation and sensitization of dural afferents. In addition, TRP channels are widely expressed in the trigeminal system and brain regions which are associated with the pathophysiology of migraine and furthermore, co-localize several neuropeptides that are implicated in the development of migraine attacks. Moreover, there are several migraine trigger agents known to activate TRP channels. Based on these, TRP channels have an essential role in migraine pain and associated symptoms, such as hyperalgesia and allodynia. In this review, we discuss the role of the certain TRP channels in migraine pathophysiology and their therapeutic applicability.
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Affiliation(s)
- Eleonóra Spekker
- ELKH-SZTE Neuroscience Research Group, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
| | - Tamás Körtési
- ELKH-SZTE Neuroscience Research Group, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
- Faculty of Health Sciences and Social Studies, University of Szeged, Temesvári krt. 31, H-6726 Szeged, Hungary
| | - László Vécsei
- ELKH-SZTE Neuroscience Research Group, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
- Department of Neurology, Faculty of Medicine, Albert Szent-Györgyi Clinical Center, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
- Correspondence: ; Tel.: +36-62-545351; Fax: +36-62-545597
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Müller I, Alt P, Rajan S, Schaller L, Geiger F, Dietrich A. Transient Receptor Potential (TRP) Channels in Airway Toxicity and Disease: An Update. Cells 2022; 11:2907. [PMID: 36139480 PMCID: PMC9497104 DOI: 10.3390/cells11182907] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/09/2022] [Accepted: 09/15/2022] [Indexed: 11/17/2022] Open
Abstract
Our respiratory system is exposed to toxicants and pathogens from both sides: the airways and the vasculature. While tracheal, bronchial and alveolar epithelial cells form a natural barrier in the airways, endothelial cells protect the lung from perfused toxic compounds, particulate matter and invading microorganism in the vascular system. Damages induce inflammation by our immune response and wound healing by (myo)fibroblast proliferation. Members of the transient receptor potential (TRP) superfamily of ion channel are expressed in many cells of the respiratory tract and serve multiple functions in physiology and pathophysiology. TRP expression patterns in non-neuronal cells with a focus on TRPA1, TRPC6, TRPM2, TRPM5, TRPM7, TRPV2, TRPV4 and TRPV6 channels are presented, and their roles in barrier function, immune regulation and phagocytosis are summarized. Moreover, TRP channels as future pharmacological targets in chronic obstructive pulmonary disease (COPD), asthma, cystic and pulmonary fibrosis as well as lung edema are discussed.
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Affiliation(s)
| | | | | | | | | | - Alexander Dietrich
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), LMU-Munich, Nussbaumstr. 26, 80336 Munich, Germany
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Transient Receptor Potential Channels: Important Players in Ocular Pain and Dry Eye Disease. Pharmaceutics 2022; 14:pharmaceutics14091859. [PMID: 36145607 PMCID: PMC9506338 DOI: 10.3390/pharmaceutics14091859] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/26/2022] [Accepted: 08/26/2022] [Indexed: 11/20/2022] Open
Abstract
Dry eye disease (DED) is a multifactorial disorder in which the eyes respond to minor stimuli with abnormal sensations, such as dryness, blurring, foreign body sensation, discomfort, irritation, and pain. Corneal pain, as one of DED’s main symptoms, has gained recognition due to its increasing prevalence, morbidity, and the resulting social burden. The cornea is the most innervated tissue in the body, and the maintenance of corneal integrity relies on a rich density of nociceptors, such as polymodal nociceptor neurons, cold thermoreceptor neurons, and mechano-nociceptor neurons. Their sensory responses to different stimulating forces are linked to the specific expression of transient receptor potential (TRP) channels. TRP channels are a group of unique ion channels that play important roles as cellular sensors for various stimuli. These channels are nonselective cation channels with variable Ca2+ selectivity. TRP homologs are a superfamily of 28 different members that are subdivided into 7 different subfamilies based on differences in sequence homology. Many of these subtypes are expressed in the eye on both neuronal and non-neuronal cells, where they affect various stress-induced regulatory responses essential for normal vision maintenance. This article reviews the current knowledge about the expression, function, and regulation of TRPs in ocular surface tissues. We also describe their implication in DED and ocular pain. These findings contribute to evidence suggesting that drug-targeting TRP channels may be of therapeutic benefit in the clinical setting of ocular pain.
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Donau J, Luo H, Virta I, Skupin A, Pushina M, Loeffler J, Haertel FV, Das A, Kurth T, Gerlach M, Lindemann D, Reinach PS, Mergler S, Valtink M. TRPV4 Stimulation Level Regulates Ca2+-Dependent Control of Human Corneal Endothelial Cell Viability and Survival. MEMBRANES 2022; 12:membranes12030281. [PMID: 35323756 PMCID: PMC8952823 DOI: 10.3390/membranes12030281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/18/2022] [Accepted: 02/24/2022] [Indexed: 02/04/2023]
Abstract
The functional contribution of transient receptor potential vanilloid 4 (TRPV4) expression in maintaining human corneal endothelial cells (HCEC) homeostasis is unclear. Accordingly, we determined the effects of TRPV4 gene and protein overexpression on responses modulating the viability and survival of HCEC. Q-PCR, Western blot, FACS analyses and fluorescence single-cell calcium imaging confirmed TRPV4 gene and protein overexpression in lentivirally transduced 12V4 cells derived from their parent HCEC-12 line. Although TRPV4 overexpression did not alter the baseline transendothelial electrical resistance (TEER), its cellular capacitance (Ccl) was larger than that in its parent. Scanning electron microscopy revealed that only the 12V4 cells developed densely packed villus-like protrusions. Stimulation of TRPV4 activity with GSK1016790A (GSK101, 10 µmol/L) induced larger Ca2+ transients in the 12V4 cells than those in the parental HCEC-12. One to ten nmol/L GSK101 decreased 12V4 viability, increased cell death rates and reduced the TEER, whereas 1 µmol/L GSK101 was required to induce similar effects in the HCEC-12. However, the TRPV4 channel blocker RN1734 (1 to 30 µmol/L) failed to alter HCEC-12 and 12V4 morphology, cell viability and metabolic activity. Taken together, TRPV4 overexpression altered both the HCEC morphology and markedly lowered the GSK101 dosages required to stimulate its channel activity.
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Affiliation(s)
- Jennifer Donau
- Institute of Anatomy, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany; (J.D.); (A.S.); (M.P.); (J.L.)
- Institute of Medical Microbiology and Virology, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Huan Luo
- Klinik für Augenheilkunde, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany; (H.L.); (I.V.)
| | - Iiris Virta
- Klinik für Augenheilkunde, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany; (H.L.); (I.V.)
| | - Annett Skupin
- Institute of Anatomy, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany; (J.D.); (A.S.); (M.P.); (J.L.)
- Institute of Medical Microbiology and Virology, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Margarita Pushina
- Institute of Anatomy, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany; (J.D.); (A.S.); (M.P.); (J.L.)
| | - Jana Loeffler
- Institute of Anatomy, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany; (J.D.); (A.S.); (M.P.); (J.L.)
| | - Frauke V. Haertel
- Institute of Physiology, Faculty of Medicine, University Giessen, 35392 Giessen, Germany;
- Institute of Physiology, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Anupam Das
- Institute of Physiology, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Thomas Kurth
- Center for Molecular and Cellular Bioengineering (CMCB), Technology Platform, TU Dresden, 01307 Dresden, Germany;
| | - Michael Gerlach
- Core Facility Cellular Imaging, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Dirk Lindemann
- Institute of Medical Microbiology and Virology, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany;
| | - Peter S. Reinach
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou 325027, China;
| | - Stefan Mergler
- Klinik für Augenheilkunde, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany; (H.L.); (I.V.)
- Correspondence: (S.M.); (M.V.)
| | - Monika Valtink
- Institute of Anatomy, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany; (J.D.); (A.S.); (M.P.); (J.L.)
- Equality and Diversity Unit, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany
- Correspondence: (S.M.); (M.V.)
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The amino-terminal domain of TRPV4 channel is involved in its trafficking to the nucleus. Biochem Biophys Res Commun 2022; 592:13-17. [PMID: 35007845 DOI: 10.1016/j.bbrc.2022.01.001] [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: 11/10/2021] [Accepted: 01/02/2022] [Indexed: 11/24/2022]
Abstract
Transient Receptor Potential Vanilloid 4 (TRPV4) ion channel is a sensor for multiple physical and chemical stimuli of ubiquitous expression that participates in various functions either in differentiated tissues or during differentiation. We recently demonstrated the nuclear localization of the full-length TRPV4 in the renal epithelial cells MDCK and its interaction with the transcriptional regulator β-catenin. Here, we describe the presence of a functional nuclear localization signals (NLS) in the N-terminal domain of TRPV4. Simultaneous substitution R404Q, K405Q, and K407Q, produces a channel that fail to reach the nucleus, while K177Q, K178Q, and R179Q mutant channel reaches the nucleus but does not arrive to the plasma membrane (PM). Similar result was observed with the S824D phosphomimetic mutant and the K407E mutation associated with skeletal dysplasia. Structural analysis of these mutants showed important remodeling in their C-terminal domains. Our observations suggest that nucleus-PM trafficking of TRPV4 is important for its cellular functions and may help to explain some deleterious effect of mutations causing TRPV4 channelopathies.
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Manneck D, Braun H, Schrapers KT, Stumpff F. TRPV3 and TRPV4 as candidate proteins for intestinal ammonium absorption. Acta Physiol (Oxf) 2021; 233:e13694. [PMID: 34031986 DOI: 10.1111/apha.13694] [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: 01/22/2021] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 02/07/2023]
Abstract
AIM Absorption of ammonia from the gut has consequences that range from encephalitis in hepatic disease to global climate change induced by nitrogenous excretions from livestock. Since patch clamp data show that certain members of the transient receptor potential (TRP) family are permeable to NH4 + , participation in ammonium efflux was investigated. METHODS Digesta, mucosa and muscular samples from stomach, duodenum, jejunum, ileum, caecum and colon of pigs were analysed via colourimetry, qPCR, Western blot, immunohistochemistry and Ussing chambers. RESULTS qPCR data show high duodenal expression of TRPV6. TRPM6 was highest in jejunum and colon, with expression of TRPM7 ubiquitous. TRPM8 and TRPV1 were below detection. TRPV2 was highest in the jejunum but almost non-detectable in the colon. TRPV4 was ubiquitously expressed by mucosal and muscular layers. TRPV3 mRNA was only found in the mucosa of the caecum and colon, organs in which NH4 + was highest (>7 mmol·L-1 ). Immunohistochemically, an apical expression of TRPV3 and TRPV4 could be detected in all tissues, with effects of 2-APB and GSK106790A supporting functional expression. In symmetrical NaCl Ringer, removal of mucosal Ca2+ and Mg2+ increased colonic short circuit current (Isc ) and conductance (Gt ) by 0.18 ± 0.06 µeq·cm-2 ·h-1 and 4.70 ± 0.85 mS·cm-2 (P < .05, N/n = 4/17). Application of mucosal NH4 Cl led to dose-dependent and divalent-sensitive increases in Gt and Isc , with effects highest in the caecum and colon. CONCLUSION We propose that TRP channels contribute to the intestinal transport of ammonium, with TRPV3 and TRPV4 promising candidate proteins. Pharmacological regulation may be possible.
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Affiliation(s)
- David Manneck
- Institute of Veterinary Physiology Freie Universität Berlin Berlin Germany
| | | | | | - Friederike Stumpff
- Institute of Veterinary Physiology Freie Universität Berlin Berlin Germany
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Kärki T, Tojkander S. TRPV Protein Family-From Mechanosensing to Cancer Invasion. Biomolecules 2021; 11:1019. [PMID: 34356643 PMCID: PMC8301805 DOI: 10.3390/biom11071019] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/30/2021] [Accepted: 07/09/2021] [Indexed: 02/08/2023] Open
Abstract
Biophysical cues from the cellular microenvironment are detected by mechanosensitive machineries that translate physical signals into biochemical signaling cascades. At the crossroads of extracellular space and cell interior are located several ion channel families, including TRP family proteins, that are triggered by mechanical stimuli and drive intracellular signaling pathways through spatio-temporally controlled Ca2+-influx. Mechanosensitive Ca2+-channels, therefore, act as critical components in the rapid transmission of physical signals into biologically compatible information to impact crucial processes during development, morphogenesis and regeneration. Given the mechanosensitive nature of many of the TRP family channels, they must also respond to the biophysical changes along the development of several pathophysiological conditions and have also been linked to cancer progression. In this review, we will focus on the TRPV, vanilloid family of TRP proteins, and their connection to cancer progression through their mechanosensitive nature.
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Affiliation(s)
- Tytti Kärki
- Department of Applied Physics, School of Science, Aalto University, 00076 Espoo, Finland;
| | - Sari Tojkander
- Department of Veterinary Biosciences, Section of Pathology, University of Helsinki, 00014 Helsinki, Finland
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Azimi I, Robitaille M, Armitage K, So CL, Milevskiy MJG, Northwood K, Lim HF, Thompson EW, Roberts-Thomson SJ, Monteith GR. Activation of the Ion Channel TRPV4 Induces Epithelial to Mesenchymal Transition in Breast Cancer Cells. Int J Mol Sci 2020; 21:ijms21249417. [PMID: 33322037 PMCID: PMC7764818 DOI: 10.3390/ijms21249417] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/03/2020] [Accepted: 12/08/2020] [Indexed: 12/16/2022] Open
Abstract
Epithelial to mesenchymal transition (EMT) in cancer is important in therapeutic resistance and invasiveness. Calcium signaling is key to the induction of EMT in breast cancer cells. Although inhibition of specific calcium-permeable ion channels regulates the induction of a sub-set of EMT markers in breast cancer cells, it is still unclear if activation of a specific calcium channel can be a driver for the induction of EMT events. In this study, we exploited the availability of a selective pharmacological activator of the calcium-permeable ion channel TRPV4 to assess the direct role of calcium influx in EMT marker induction. Gene association studies revealed a link between TRPV4 and gene-ontologies associated with EMT and poorer relapse-free survival in lymph node-positive basal breast cancers. TRPV4 was an important component of the calcium influx phase induced in MDA-MB-468 breast cancer cells by the EMT inducer epidermal growth factor (EGF). Pharmacological activation of TRPV4 then drove the induction of a variety of EMT markers in breast cancer cells. These studies demonstrate that calcium influx through specific pathways appears to be sufficient to trigger EMT events.
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Affiliation(s)
- Iman Azimi
- School of Pharmacy and Pharmacology, College of Health and Medicine, University of Tasmania, Hobart, TAS 7005, Australia;
| | - Mélanie Robitaille
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
| | - Kaela Armitage
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
| | - Choon Leng So
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
| | - Michael J. G. Milevskiy
- ACRF Cancer Biology and Stem Cells Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia;
| | - Korinne Northwood
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4067, Australia;
- UQ Centre for Clinical Research, The University of Queensland, Herston, QLD 4029, Australia
| | - Huai Fang Lim
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
| | - Erik W. Thompson
- Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Brisbane, QLD 4102, Australia;
- Translational Research Institute, The University of Queensland, Brisbane, QLD 4102, Australia
- Department of Surgery, St. Vincent’s Hospital, University of Melbourne, Melbourne, VIC 3065, Australia
| | - Sarah J. Roberts-Thomson
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
| | - Gregory R. Monteith
- School of Pharmacy, The University of Queensland, Brisbane, QLD 4102, Australia; (M.R.); (K.A.); (C.L.S.); (H.F.L.); (S.J.R.-T.)
- Mater Research Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD 4102, Australia
- Correspondence: ; Tel.: +61-7-334-61855
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Sun L, Yao K, Zhang H, Chen W. Activation of the ATP-P2X pathway by TRPV4 in acute ocular hypertension. Int J Ophthalmol 2020; 13:1697-1704. [PMID: 33214998 DOI: 10.18240/ijo.2020.11.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 08/06/2020] [Indexed: 11/23/2022] Open
Abstract
AIM To measure the expression of transient receptor potential cation channel subfamily V member 4 (TRPV4) in the rat cornea and determine whether it is related to adenosine triphosphate (ATP) generation in a rat model of acute ocular hypertension (AOH). METHODS Immunofluorescence staining of TRPV4, P2X2 receptor, P2X3 receptor, and β3-tubulin in rat corneal longitudinal sections and paved was performed to clearly display histological structures. Rat models of AOH and agonist/antagonist-treated groups were established and corneal ATP was measured using an ATP assay. The independent t-test and simple linear correlation model were adopted for statistical analyses. RESULTS Immunofluorescence staining of rat cornea sections revealed that epithelial and endothelial membranes showed strong immunoreactivity for TRPV4 and P2X2 receptor and coexpression with β3-tubulin in the rat corneal epithelial layer. Corneal ATP was significantly higher in the AOH rat model than in the control (P<0.05) and apparently lower after pretreatment by applying eyedrops of TRPV4 antagonist RN1734 with 30-40 mm Hg intraocular pressure (IOP; P<0.05). A simple linear regression model showed a positive correlation between rat corneal ATP and IOP values (R 2=0.996, P=0.0134) from the normal IOP (113 mm Hg) to 40 mm Hg. At 10-40min after anterior chamber injection of GSK1016790A (0.01 mL, 50 nmol/L in 0.9% NaCl), corneal ATP was significantly higher than in the control group (P<0.05), which peaked at 10min. The ATP concentration of the normal epithelium was higher than that of the endothelium in the AOH rat model and after anterior chamber injection of GSK1016790A (P<0.05). CONCLUSION The ATP concentration in the AOH rat cornea is increased by TRPV4 activation.
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Affiliation(s)
- Li Sun
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei Province, China
| | - Ke Yao
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei Province, China
| | - Hong Zhang
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei Province, China
| | - Wei Chen
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei Province, China
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Ortiz-Melo MT, Garcia-Murillo MJ, Salazar-Rojas VM, Campos JE, Castro-Muñozledo F. Transcriptional profiles along cell programming into corneal epithelial differentiation. Exp Eye Res 2020; 202:108302. [PMID: 33098888 DOI: 10.1016/j.exer.2020.108302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/23/2020] [Accepted: 10/12/2020] [Indexed: 12/15/2022]
Abstract
Using the rabbit corneal epithelial cell line RCE1(5T5) as a model, we analyzed three differentiation stages, distinguished on basis to the growth state of cultured cells and after studying the expression of transcription factors such as Oct4, Pax6 and ΔNp63α, selected differentiation markers, and signaling or epigenetic markers such as Notch receptors and Prdm3. Namely, proliferative non-differentiated cells, committed cells, and cells that constitute a stratified epithelium with a limbal epithelial-like structure. RNAseq based transcriptome analysis showed that 4891 genes were differentially expressed among these stages displaying distinctive gene signatures: proliferative cells had 1278 genes as gene signature, and seem to be early epithelial progenitors with an Oct4+, KLF4+, Myc+, ΔNp63α+, ABCG2+, Vimentin+, Zeb1+, VANGL1+, Krt3-, Krt12- phenotype. Committed cells had a gene signature with 417 genes and displayed markers indicative of the beginning of corneal differentiation, and genes characteristic of proliferative cells; we found the possible participation of Six3 and Six4 transcription factors along this stage. The third stage matches with a stratified corneal epithelium (gene signature comprising 979 genes) and is typified by an increase in the expression of WNT10A and NOTCH 2 and 3 signaling and Cux1 transcription factor, besides Pax6, KLF4 or Sox9. The differentiated cells express about 50% of the genes that belong to the Epidermal Differentiation Complex (EDC). Analysis of the differences between corneal epithelium and epidermis could be crucial to understand the regulatory mechanisms that lead to the expression of the differentiated phenotype.
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Affiliation(s)
- María Teresa Ortiz-Melo
- Department of Cell Biology, Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740. México City, 07000, Mexico; Unidad de Biotecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Ap. Postal 314, 54000, Tlalnepantla, Edo. de México, Mexico; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México. Unidad de Posgrado, Edificio A, 1° Piso, Circuito de Posgrados, Ciudad Universitaria, Coyoacán, C.P. 04510, Ciudad de México, Mexico
| | - Maria Jimena Garcia-Murillo
- Department of Cell Biology, Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740. México City, 07000, Mexico
| | - Víctor Manuel Salazar-Rojas
- Unidad de Biotecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Ap. Postal 314, 54000, Tlalnepantla, Edo. de México, Mexico
| | - Jorge E Campos
- Unidad de Biotecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Ap. Postal 314, 54000, Tlalnepantla, Edo. de México, Mexico
| | - Federico Castro-Muñozledo
- Department of Cell Biology, Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740. México City, 07000, Mexico.
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Weber J, Rajan S, Schremmer C, Chao YK, Krasteva-Christ G, Kannler M, Yildirim AÖ, Brosien M, Schredelseker J, Weissmann N, Grimm C, Gudermann T, Dietrich A. TRPV4 channels are essential for alveolar epithelial barrier function as protection from lung edema. JCI Insight 2020; 5:134464. [PMID: 32931478 PMCID: PMC7605532 DOI: 10.1172/jci.insight.134464] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 09/09/2020] [Indexed: 12/25/2022] Open
Abstract
Ischemia/reperfusion-induced edema (IRE), one of the most significant causes of mortality after lung transplantation, can be mimicked ex vivo in isolated perfused mouse lungs (IPL). Transient receptor potential vanilloid 4 (TRPV4) is a nonselective cation channel studied in endothelium; however, its role in the lung epithelium remains elusive. Here, we show enhanced IRE in TRPV4-deficient (TRPV4–/–) IPL compared with that of WT controls, indicating a protective role of TRPV4 in maintenance of the alveolar epithelial barrier. By immunohistochemistry, mRNA profiling, and electrophysiological characterization, we detected TRPV4 in bronchial epithelium, alveolar epithelial type I (ATI), and alveolar epithelial type II (ATII) cells. Genetic ablation of TRPV4 resulted in reduced expression of the water-conducting aquaporin-5 (AQP-5) channel in ATI cells. Migration of TRPV4–/– ATI cells was reduced, and cell barrier function was impaired. Analysis of isolated primary TRPV4–/– ATII cells revealed a reduced expression of surfactant protein C, and the TRPV4 activator GSK1016790A induced increases in current densities only in WT ATII cells. Moreover, TRPV4–/– lungs of adult mice developed significantly larger mean chord lengths and altered lung function compared with WT lungs. Therefore, our data illustrate essential functions of TRPV4 channels in alveolar epithelial cells and in protection from edema formation. TRPV4, a non-selective cation channel, is essential for alveolar epithelial function and protects from ischemia-reperfusion-induced lung edema.
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Affiliation(s)
- Jonas Weber
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Suhasini Rajan
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Christian Schremmer
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Yu-Kai Chao
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Gabriela Krasteva-Christ
- Institute of Anatomy and Cell Biology, School of Medicine, Saarland University, Homburg, Germany
| | - Martina Kannler
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Ali Önder Yildirim
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, a member of the DZL, Helmholtz Center Munich, German Research Center for Environmental Health, Munich, Germany
| | - Monika Brosien
- Justus Liebig University Giessen, Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, a member of the DZL, Giessen, Germany
| | - Johann Schredelseker
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Norbert Weissmann
- Justus Liebig University Giessen, Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, a member of the DZL, Giessen, Germany
| | - Christian Grimm
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
| | - Alexander Dietrich
- Walther Straub Institute of Pharmacology and Toxicology, a member of the German Center for Lung Research (DZL), Ludwig Maximilian University of Munich, Munich Germany
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14
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Espadas-Álvarez H, Martínez-Rendón J, Larre I, Matamoros-Volante A, Romero-García T, Rosenbaum T, Rueda A, García-Villegas R. TRPV4 activity regulates nuclear Ca 2+ and transcriptional functions of β-catenin in a renal epithelial cell model. J Cell Physiol 2020; 236:3599-3614. [PMID: 33044004 DOI: 10.1002/jcp.30096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 11/11/2022]
Abstract
TRPV4 is a nonselective cationic channel responsive to several physical and chemical stimuli. Defects in TRPV4 channel function result in human diseases, such as skeletal dysplasias, arthropathies, and peripheral neuropathies. Nonetheless, little is known about the role of TRPV4 in other cellular functions, such as nuclear Ca2+ homeostasis or Ca2+ -regulated transcription. Here, we confirmed the presence of the full-length TRPV4 channel in the nuclei of nonpolarized Madin-Darby canine kidney cells. Confocal Ca2+ imaging showed that activation of the channel increases cytoplasmic and nuclear Ca2+ leading to translocation of TRPV4 out of the nucleus together with β-catenin, a transcriptional regulator in the Wnt signaling pathway fundamental in embryogenesis, organogenesis, and cellular homeostasis. TRPV4 inhibits β-catenin transcriptional activity through a direct interaction dependent upon channel activity. This interaction also occurs in undifferentiated osteoblastoma and neuroblastoma cell models. Our results suggest a mechanism in which TRPV4 may regulate differentiation in several cellular contexts.
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Affiliation(s)
- Heidi Espadas-Álvarez
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
| | - Jacqueline Martínez-Rendón
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
| | - Isabel Larre
- Marshall Institute for Interdisciplinary Research and Department of Clinical and Translational Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | | | - Tatiana Romero-García
- Departamento de Bioquímica, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
| | - Tamara Rosenbaum
- Departamento de Neurociencia Cognitiva, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Angélica Rueda
- Departamento de Bioquímica, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
| | - Refugio García-Villegas
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, México
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Guarino BD, Paruchuri S, Thodeti CK. The role of TRPV4 channels in ocular function and pathologies. Exp Eye Res 2020; 201:108257. [PMID: 32979394 DOI: 10.1016/j.exer.2020.108257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 12/15/2022]
Abstract
Transient potential receptor vanilloid 4 (TRPV4) is an ion channel responsible for sensing osmotic and mechanical signals, which in turn regulates calcium signaling across cell membranes. TRPV4 is widely expressed throughout the body, and plays an important role in normal physiological function, as well as different pathologies, however, its role in the eye is not well known. In the eye, TRPV4 is expressed in various tissues, such as the retina, corneal epithelium, ciliary body, and the lens. In this review, we provide an overview on TRPV4 structure, activation, mutations, and summarize the current knowledge of TRPV4 function and signaling mechanisms in various locations throughout the eye, as well as its role in ocular diseases, such as glaucoma and diabetic retinopathy. Based on the available data, we highlight the therapeutic potential of TRPV4 as well as the shortcomings of current research. Finally, we provide future perspectives on the implications of targeting TRPV4 to treat various ocular pathologies.
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Affiliation(s)
- Brianna D Guarino
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | | | - Charles K Thodeti
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH, 44272, USA.
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16
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Lapajne L, Lakk M, Yarishkin O, Gubeljak L, Hawlina M, Križaj D. Polymodal Sensory Transduction in Mouse Corneal Epithelial Cells. Invest Ophthalmol Vis Sci 2020; 61:2. [PMID: 32271891 PMCID: PMC7401707 DOI: 10.1167/iovs.61.4.2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Purpose Contact lenses, osmotic stressors, and chemical burns may trigger severe discomfort and vision loss by damaging the cornea, but the signaling mechanisms used by corneal epithelial cells (CECs) to sense extrinsic stressors are not well understood. We therefore investigated the mechanisms of swelling, temperature, strain, and chemical transduction in mouse CECs. Methods Intracellular calcium imaging in conjunction with electrophysiology, pharmacology, transcript analysis, immunohistochemistry, and bioluminescence assays of adenosine triphosphate (ATP) release were used to track mechanotransduction in dissociated CECs and epithelial sheets isolated from the mouse cornea. Results The transient receptor potential vanilloid (TRPV) transcriptome in the mouse corneal epithelium is dominated by Trpv4, followed by Trpv2, Trpv3, and low levels of Trpv1 mRNAs. TRPV4 protein was localized to basal and intermediate epithelial strata, keratocytes, and the endothelium in contrast to the cognate TRPV1, which was confined to intraepithelial afferents and a sparse subset of CECs. The TRPV4 agonist GSK1016790A induced cation influx and calcium elevations, which were abolished by the selective blocker HC067047. Hypotonic solutions, membrane strain, and moderate heat elevated [Ca2+]CEC with swelling- and temperature-, but not strain-evoked signals, sensitive to HC067047. GSK1016790A and swelling evoked calcium-dependent ATP release, which was suppressed by HC067027 and the hemichannel blocker probenecid. Conclusions These results demonstrate that cation influx via TRPV4 transduces osmotic and thermal but not strain inputs to CECs and promotes hemichannel-dependent ATP release. The TRPV4-hemichannel-ATP signaling axis might modulate corneal pain induced by excessive mechanical, osmotic, and chemical stimulation.
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17
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Liu N, Yan F, Ma Q, Zhao J. Modulation of TRPV4 and BKCa for treatment of brain diseases. Bioorg Med Chem 2020; 28:115609. [PMID: 32690264 DOI: 10.1016/j.bmc.2020.115609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 12/22/2022]
Abstract
As a member of transient receptor potential family, the transient receptor potential vanilloid 4 (TRPV4) is a kind of nonselective calcium-permeable cation channel, which belongs to non-voltage gated Ca2+ channel. Large-conductance Ca2+-activated K+ channel (BKCa) represents a unique superfamily of Ca2+-activated K+ channel (KCa) that is both voltage and intracellular Ca2+ dependent. Not surprisingly, aberrant function of either TRPV4 or BKCa in neurons has been associated with brain disorders, such as Alzheimer's disease, cerebral ischemia, brain tumor, epilepsy, as well as headache. In these diseases, vascular dysfunction is a common characteristic. Notably, endothelial and smooth muscle TRPV4 can mediate BKCa to regulate cerebral blood flow and pressure. Therefore, in this review, we not only discuss the diverse functions of TRPV4 and BKCa in neurons to integrate relative signaling pathways in the context of cerebral physiological and pathological situations respectively, but also reveal the relationship between TRPV4 and BKCa in regulation of cerebral vascular tone as an etiologic factor. Based on these analyses, this review demonstrates the effective mechanisms of compounds targeting these two channels, which may be potential therapeutic strategies for diseases in the brain.
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Affiliation(s)
- Na Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China; Department of Anesthesiology, The Affiliated Hospital of Kunming University of Science and Technology, Kunming 650032, PR China
| | - Fang Yan
- Medical School, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Qingjie Ma
- Department of Anesthesiology, The Affiliated Hospital of Kunming University of Science and Technology, Kunming 650032, PR China
| | - Jianhua Zhao
- Department of Neurosurgery, The Affiliated Hospital of Kunming University of Science and Technology, Kunming 650032, PR China.
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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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Huang YY, Li J, Zhang HR, Bai SW, Yang HY, Shen B, Du J, Xia XM. The effect of transient receptor potential vanilloid 4 on the intestinal epithelial barrier and human colonic cells was affected by tyrosine-phosphorylated claudin-7. Biomed Pharmacother 2019; 122:109697. [PMID: 31918271 DOI: 10.1016/j.biopha.2019.109697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/22/2019] [Accepted: 11/22/2019] [Indexed: 02/07/2023] Open
Abstract
TRPV4 is a type of nonselective cation channel, and activation of TRPV4 in the gastrointestinal tract causes experimental colitis in mice. A previous study found that tyrosine-phosphorylated claudin-7 is increased in experimental colitis. The relationship between tyrosine-phosphorylated claudin-7 and TRPV4 remains undefined. In the present study, we developed a claudin-7 mutant by replacing tyrosine with glutamic acid at position 210, named cld7-Y210E colonic cells. We found that activation of TRPV4 by GSK1016790A increased the permeability of control colonic cell monolayers, which was decreased by the TRPV4 antagonist HC067047. In monolayers of cld7-Y210E colonic cells, no differences in permeability were found between GSK1016790A and HC067047 treatments. GSK1016790A increased the aggregation of claudin-7 at the cell membrane in control colonic cells, and the effect was diminished by HC067047. In cld7-Y210E colonic cells, neither GSK1016790A nor HC067047 apparently changed the aggregation of claudin-7. Neither GSK1016790A nor HC067047 altered the TRPV4 protein level in vector colonic cells. In cld7-wild colonic cells, GSK1016790A did not alter the TRPV4 protein level, while HC067047 increased the TRPV4 protein level. The TRPV4 protein level was increased in cld7-Y210E colonic cells, decreased by GSK1016790A and further decreased by HC067047. Calcium influx was not significantly changed in the control colonic cells treated with GSK1016790A. However, GSK1016790A significantly increased calcium influx in cld7-Y210E colonic cells. We concluded that tyrosine-phosphorylated claudin-7 affects the TRPV4-modulated intestinal epithelial barrier, TRPV4-mediated calcium influx, and the protein expression of TRPV4 in human colonic cells. We suggest that tyrosine-phosphorylated claudin-7 affects the TRPV4-modulated intestinal epithelial barrier, which might be related to TRPV4 expression and TRPV4-mediated calcium influx.
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Affiliation(s)
- Yuan-Yuan Huang
- Department of Internal Medicine, Yangpu Hospital, Tongji University, Shanghai 200090, China
| | - Jing Li
- Department of Gastroenterology and Hepatology, Danyang People's Hospital, Danyang, 212300, Jiangsu, China
| | - He-Rui Zhang
- Department of Gastroenterology and Hepatology, the Fourth Affiliated Hospital of Anhui Medical University, Hefei, 230001, Anhui, China
| | - Su-Wen Bai
- Department of Physiology, School of Basic Medicine, Anhui Medical University, Hefei 230032, Anhui, China
| | - Hui-Yun Yang
- Department of Gastroenterology, the Anhui Provincial Children's Hospital, Hefei 230051, Anhui, China
| | - Bing Shen
- Department of Physiology, School of Basic Medicine, Anhui Medical University, Hefei 230032, Anhui, China
| | - Juan Du
- Department of Physiology, School of Basic Medicine, Anhui Medical University, Hefei 230032, Anhui, China.
| | - Xian-Ming Xia
- Department of Gastroenterology and Hepatology, the Fourth Affiliated Hospital of Anhui Medical University, Hefei, 230001, Anhui, China.
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Mukaiyama M, Yamasaki Y, Usui T, Nagumo Y. Transient receptor potential V4 channel stimulation induces reversible epithelial cell permeability in
MDCK
cell monolayers. FEBS Lett 2019; 593:2250-2260. [DOI: 10.1002/1873-3468.13490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/03/2019] [Accepted: 06/03/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Minagi Mukaiyama
- Graduate School of Life and Environmental Sciences University of Tsukuba Japan
| | - Yohei Yamasaki
- Graduate School of Life and Environmental Sciences University of Tsukuba Japan
| | - Takeo Usui
- Faculty of Life and Environmental Sciences University of Tsukuba Japan
- Microbiology Research Center for Sustainability (MiCS) University of Tsukuba Japan
| | - Yoko Nagumo
- Faculty of Life and Environmental Sciences University of Tsukuba Japan
- Alliance for Research on the Mediterranean and North Africa (ARENA) University of Tsukuba Japan
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Modulators of Transient Receptor Potential (TRP) Channels as Therapeutic Options in Lung Disease. Pharmaceuticals (Basel) 2019; 12:ph12010023. [PMID: 30717260 PMCID: PMC6469169 DOI: 10.3390/ph12010023] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/25/2022] Open
Abstract
The lungs are essential for gas exchange and serve as the gateways of our body to the external environment. They are easily accessible for drugs from both sides, the airways and the vasculature. Recent literature provides evidence for a role of Transient Receptor Potential (TRP) channels as chemosensors and essential members of signal transduction cascades in stress-induced cellular responses. This review will focus on TRP channels (TRPA1, TRPC6, TRPV1, and TRPV4), predominantly expressed in non-neuronal lung tissues and their involvement in pathways associated with diseases like asthma, cystic fibrosis, chronic obstructive pulmonary disease (COPD), lung fibrosis, and edema formation. Recently identified specific modulators of these channels and their potential as new therapeutic options as well as strategies for a causal treatment based on the mechanistic understanding of molecular events will also be evaluated.
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Gulias-Cañizo R, Lagunes-Guillén A, González-Robles A, Sánchez-Guzmán E, Castro-Muñozledo F. (-)-Epigallocatechin-3-gallate, reduces corneal damage secondary from experimental grade II alkali burns in mice. Burns 2018; 45:398-412. [PMID: 30600126 DOI: 10.1016/j.burns.2018.08.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/02/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Since recent reports have shown that (-)-Epigallocatechin-3-gallate (EGCG) could be used for treating proliferative and inflammatory disorders, we explored its use for the management of corneal chemical burns. MATERIALS AND METHODS Initially, EGCG was assayed on the rabbit corneal epithelial cell line RCE1(5T5) to establish the best testing conditions, and to avoid unwanted outcomes in the experimental animals. Then, we studied its effects on cell proliferation, cell cycle progression and cell differentiation. Afterwards, we instilled EGCG in experimental grade II corneal alkali burns in mice, three times a day up to 21days, and evaluated by slit lamp examination and histological sections of corneal epithelial, corneal endothelial and stromal edema, as well as the presence of inflammatory cells and neovascularization. RESULTS EGCG reduced cell growth and led to a decline in the proportion of proliferative cells in a concentration dependent manner. At 10μM, EGCG promoted cell differentiation, an effect not related with apoptosis or cytotoxicity. When 10μM EGCG was instilled in corneal alkali burns in mice three times a day up to 21days, EGCG significantly reduced corneal opacity and neovascularization. The improved clinical appearance of the cornea was associated to a controlled epithelial growth; epithelial morphology was similar to that observed in normal epithelium and contrasted with the hyperproliferative, desquamating epithelium observed in control burn wounds. EGCG reduced corneal, stromal and endothelial edema, and wound inflammation. CONCLUSION This work constitutes the first evidence for the use of EGCG in the acute phase of a corneal alkali burn, representing a possible novel alternative to improve patient outcomes as an add-on therapy.
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Affiliation(s)
- Rosario Gulias-Cañizo
- Hospital "Luis Sánchez Bulnes" de la Asociación para Evitar la Ceguera en, México City, México; Departamento de Biología Celular, CINVESTAV-IPN. Apdo. Postal 14-740, México D.F. 07000, México
| | - Anell Lagunes-Guillén
- Departamento de Infectómica y Patogénesis Molecular, CINVESTAV-IPN. Apdo. Postal 14-740, México D.F. 07000, México
| | - Arturo González-Robles
- Departamento de Infectómica y Patogénesis Molecular, CINVESTAV-IPN. Apdo. Postal 14-740, México D.F. 07000, México
| | - Erika Sánchez-Guzmán
- Departamento de Biología Celular, CINVESTAV-IPN. Apdo. Postal 14-740, México D.F. 07000, México
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Kobayashi K, Tsugami Y, Matsunaga K, Suzuki T, Nishimura T. Moderate High Temperature Condition Induces the Lactation Capacity of Mammary Epithelial Cells Through Control of STAT3 and STAT5 Signaling. J Mammary Gland Biol Neoplasia 2018; 23:75-88. [PMID: 29633073 DOI: 10.1007/s10911-018-9393-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/22/2018] [Indexed: 12/14/2022] Open
Abstract
In lactating mammary glands, alveolar mammary epithelial cells (MECs) synthesize and secrete milk components. MECs also form less permeable tight junctions (TJs) to prevent the leakage of milk components. During lactation, MECs are exposed to temperature changes by metabolic heat production and air ambient temperature. In this study, we investigated whether temperature changes influence milk production ability and TJ barriers in MECs by using two lactating culture models. The results showed that 39 °C treatment activated milk production and enhanced the formation of less-permeable TJs. In contrast, 41 °C treatment caused adverse effects on the TJ barrier and cell viability, although the milk production ability of MECs was temporarily up-regulated. MECs cultured at 37 °C showed relatively low milk production ability and high proliferation activity. Furthermore, we investigated three kinds of transcription factors relating to lactogenesis, signal transducer and activator of transcription 5 (STAT5), STAT3 and glucocorticoid receptor (GR). STAT5 signaling was activated at 39 and 41 °C by an increase in total STAT5. However, long-term treatment led to a decrease in total STAT5. STAT3 signaling was inactivated by high temperature treatment through a decrease in total STAT3 and inhibited phosphorylation of STAT3. GR signaling was continuously activated regardless of temperature. These results indicate that a moderate high temperature condition at 39 °C induces a high lactation capacity of MECs through control of STAT5 and STAT3 signaling. In contrast, long-term exposure at 41 °C leads to a decline in milk production capacity by inactivation of STAT5 and a decrease in the total number of MECs.
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Affiliation(s)
- Ken Kobayashi
- Laboratory of Cell and Tissue Biology, Research Faculty of Agriculture, Hokkaido University, North 9, West 9, Sapporo, 060-8589, Japan.
| | - Yusaku Tsugami
- Laboratory of Cell and Tissue Biology, Research Faculty of Agriculture, Hokkaido University, North 9, West 9, Sapporo, 060-8589, Japan
| | - Kota Matsunaga
- Laboratory of Cell and Tissue Biology, Research Faculty of Agriculture, Hokkaido University, North 9, West 9, Sapporo, 060-8589, Japan
| | - Takahiro Suzuki
- Laboratory of Cell and Tissue Biology, Research Faculty of Agriculture, Hokkaido University, North 9, West 9, Sapporo, 060-8589, Japan
| | - Takahiro Nishimura
- Laboratory of Cell and Tissue Biology, Research Faculty of Agriculture, Hokkaido University, North 9, West 9, Sapporo, 060-8589, Japan
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Wen L, Wen YC, Ke GJ, Sun SQ, Dong K, Wang L, Liao RF. TRPV4 regulates migration and tube formation of human retinal capillary endothelial cells. BMC Ophthalmol 2018; 18:38. [PMID: 29433476 PMCID: PMC5809855 DOI: 10.1186/s12886-018-0697-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 01/29/2018] [Indexed: 02/03/2023] Open
Abstract
Background Ca2+ entry plays an important role in modulating endothelial cell migration and tube formation. Transient receptor potential cation channel subfamily V member 4 (TRPV4) is a Ca2+-permeable channel that is widely expressed in endothelial cells. It has been reported that TRPV4 is expressed in HRCECs and regulates Ca2+ entry. However, the function of TRPV4 in human retinal capillary endothelial cells (HRCECs) remains unknown. Methods In this study we used western blot and immunostaining assay to verify TRPV4 expression in HRCECs. And then we pretreated HRCECs with HC067047 and transfected with specific shRNA of TRPV4. The functional presence of TrpV4 was determined by using fluorescence, migration and tube formation assay in TrpV4 knockdown cells or control cells. Results Using western blot and immunostaining, we confirmed TRPV4 expression in HRCECs. Moreover, inhibition of TRPV4 using the specific inhibitor HC067047 and the knockdown of TRPV4 with shRNA significantly suppressed tube formation and migration by HRCECs. Conclusions TRPV4 is essential for HRCEC migration and tube formation, and maybe a potential therapeutic target for retinal vascular diseases. Electronic supplementary material The online version of this article (10.1186/s12886-018-0697-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lei Wen
- Department of Ophthalmology, The First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui, 230022, China.,Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Yue-Chun Wen
- Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Gen-Jie Ke
- Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Si-Qin Sun
- Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Kai Dong
- Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Lin Wang
- Department of Ophthalmology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Rong-Feng Liao
- Department of Ophthalmology, The First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui, 230022, China.
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