1
|
Mitrokhin V, Bilichenko A, Kazanski V, Schobik R, Shileiko S, Revkova V, Kalsin V, Kamkina O, Kamkin A, Mladenov M. Transcriptomic profile of the mechanosensitive ion channelome in human cardiac fibroblasts. Exp Biol Med (Maywood) 2023; 248:2341-2350. [PMID: 38158807 PMCID: PMC10903254 DOI: 10.1177/15353702231218488] [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: 04/13/2023] [Accepted: 09/27/2023] [Indexed: 01/03/2024] Open
Abstract
Human cardiac fibroblasts (HCFs) have mRNA transcripts that encode different mechanosensitive ion channels and channel regulatory proteins whose functions are not known yet. The primary goal of this work was to define the mechanosensitive ion channelome of HCFs. The most common type of cationic channel is the transient receptor potential (TRP) family, which is followed by the TWIK-related K+ channel (TREK), transmembrane protein 63 (TMEM63), and PIEZO channel (PIEZO) families. In the sodium-dependent NON-voltage-gated channel (SCNN) subfamily, only SCNN1D was shown to be highly expressed. Particular members of the acid-sensing ion channel (ASIC) (ASIC1 and ASIC3) subfamilies were also significantly expressed. The transcripts per kilobase million (TPMs) for Piezo 2 were almost 100 times less abundant than those for Piezo 1. The tandem of P domains in a weak inward rectifying K+ channel (TWIK)-2 channel, TWIK-related acid-sensitive K+ channel (TASK)-5, TASK-1, and the TWIK-related K1 (TREK-1) channel were the four most prevalent types in the K2P subfamily. The highest expression in the TRPP subfamily was found for PKD2 and PKD1, while in the TRPM subfamily, it was found for TRPM4, TRPM7, and TRPM3. TRPV2, TRPV4, TRPV3, and TRPV6 (all members of the TRPV subfamily) were also substantially expressed. A strong expression of the TRPC1, TRPC4, TRPC6, and TRPC2 channels and all members of the TRPML subfamily (MCOLN1, MCOLN2, and MCOLN3) was also shown. In terms of the transmembrane protein 16 (TMEM16) family, the HCFs demonstrated significant expression of the TMEM16H, TMEM16F, TMEM16J, TMEM16A, and TMEM16G channels. TMC3 is the most expressed channel in HCFs of all known members of the transmembrane channel-like protein (TMC) family. This analysis of the mechanosensitive ionic channel transcriptome in HCFs: (1) agrees with previously documented findings that all currently identified mechanosensitive channels play a significant and well recognized physiological function in elucidating the mechanosensitive characteristics of HCFs; (2) supports earlier preliminary reports that point to the most common expression of the TRP mechanosensitive family in HCFs; and (3) points to other new mechanosensitive channels (TRPC1, TRPC2, TWIK-2, TMEM16A, ASIC1, and ASIC3).
Collapse
Affiliation(s)
- Vadim Mitrokhin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Andrei Bilichenko
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Viktor Kazanski
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Roman Schobik
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Stanislav Shileiko
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Veronika Revkova
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Vladimir Kalsin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Olga Kamkina
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Andre Kamkin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Mitko Mladenov
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
- Institute of Biology, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia
| |
Collapse
|
2
|
Rucher G, Prigent K, Simard C, Frelin AM, Coquemont-Guyot M, Elie N, Delcroix N, Perzo N, Guinamard R, Berger L, Manrique A. Targeted Radiation Exposure Induces Accelerated Aortic Valve Remodeling in ApoE -/- Mice. J Clin Med 2023; 12:5854. [PMID: 37762794 PMCID: PMC10531867 DOI: 10.3390/jcm12185854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/25/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Thoracic radiation therapy may result in accelerated atherosclerosis and in late aortic valve stenosis (AS). In this study, we assessed the feasibility of inducing radiation-induced AS using a targeted aortic valve irradiation (10 or 20 Grays) in two groups of C57Bl6/J (WT) and ApoE-/- mice compared to a control (no irradiation). Peak aortic jet velocity was evaluated by echocardiography to characterize AS. T2*-weighted magnetic resonance imaging after injection of MPIO-αVCAM-1 was used to examine aortic inflammation resulting from irradiation. A T2* signal void on valve leaflets and aortic sinus was considered positive. Valve remodeling and mineralization were assessed using von Kossa staining. Finally, the impact of radiation on cell viability and cycle from aortic human valvular interstitial cells (hVICs) was also assessed. The targeted aortic valve irradiation in ApoE-/- mice resulted in an AS characterized by an increase in peak aortic jet velocity associated with valve leaflet and aortic sinus remodeling, including mineralization process, at the 3-month follow-up. There was a linear correlation between histological findings and peak aortic jet velocity (r = 0.57, p < 0.01). In addition, irradiation was associated with aortic root inflammation, evidenced by molecular MR imaging (p < 0.01). No significant effect of radiation exposure was detected on WT animals. Radiation exposure did not affect hVICs viability and cell cycle. We conclude that targeted radiation exposure of the aortic valve in mice results in ApoE-/-, but not in WT, mice in an aortic valve remodeling mimicking the human lesions. This preclinical model could be a useful tool for future assessment of therapeutic interventions.
Collapse
Affiliation(s)
- Guillaume Rucher
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
| | - Kevin Prigent
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
- Department of Nuclear Medicine, CHU de Caen, 14000 Caen, France
| | - Christophe Simard
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
| | - Anne-Marie Frelin
- Grand Accélérateur National d’Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, 14000 Caen, France
| | - Maëlle Coquemont-Guyot
- Normandie Univ, UNICAEN, SF 4207, PLATON Services Unit, Virtual’His, 14000 Caen, France (N.E.)
| | - Nicolas Elie
- Normandie Univ, UNICAEN, SF 4207, PLATON Services Unit, Virtual’His, 14000 Caen, France (N.E.)
| | - Nicolas Delcroix
- CNRS, UMS-3048, GIP Cyceron, Campus Jules Horowitz, 14000 Caen, France
| | - Nicolas Perzo
- Normandie Univ, UNIROUEN, INSERM U1096 EnVI, 76000 Rouen, France;
| | - Romain Guinamard
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
| | - Ludovic Berger
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
- Department of Vascular Surgery, Normandie Univ, UNICAEN, UR 4650 PSIR, CHU de Caen, 14000 Caen, France
| | - Alain Manrique
- Normandie Univ, UNICAEN, UR 4650 PSIR, GIP Cyceron, 14000 Caen, France (K.P.); (C.S.); (R.G.); (L.B.)
- Department of Nuclear Medicine, CHU de Caen, 14000 Caen, France
| | | |
Collapse
|
3
|
Hu Y, Cang J, Hiraishi K, Fujita T, Inoue R. The Role of TRPM4 in Cardiac Electrophysiology and Arrhythmogenesis. Int J Mol Sci 2023; 24:11798. [PMID: 37511555 PMCID: PMC10380800 DOI: 10.3390/ijms241411798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
The transient receptor potential melastatin 4 (TRPM4) channel is a non-selective cation channel that activates in response to increased intracellular Ca2+ levels but does not allow Ca2+ to pass through directly. It plays a crucial role in regulating diverse cellular functions associated with intracellular Ca2+ homeostasis/dynamics. TRPM4 is widely expressed in the heart and is involved in various physiological and pathological processes therein. Specifically, it has a significant impact on the electrical activity of cardiomyocytes by depolarizing the membrane, presumably via Na+ loading. The TRPM4 channel likely contributes to the development of cardiac arrhythmias associated with specific genetic backgrounds and cardiac remodeling. This short review aims to overview what is known so far about the TRPM4 channel in cardiac electrophysiology and arrhythmogenesis, highlighting its potential as a novel therapeutic target to effectively prevent and treat cardiac arrhythmias.
Collapse
Affiliation(s)
- Yaopeng Hu
- Department of Physiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Jiehui Cang
- Department of Physiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Keizo Hiraishi
- Department of Physiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Takayuki Fujita
- Department of Physiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Ryuji Inoue
- Department of Physiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| |
Collapse
|
4
|
Boukenna M, Rougier JS, Aghagolzadeh P, Pradervand S, Guichard S, Hämmerli AF, Pedrazzini T, Abriel H. Multiomics uncover the proinflammatory role of Trpm4 deletion after myocardial infarction in mice. Am J Physiol Heart Circ Physiol 2023; 324:H504-H518. [PMID: 36800508 DOI: 10.1152/ajpheart.00671.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/10/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Upon myocardial infarction (MI), ischemia-induced cell death triggers an inflammatory response responsible for removing necrotic material and inducing tissue repair. TRPM4 is a Ca2+-activated ion channel permeable to monovalent cations. Although its role in cardiomyocyte-driven hypertrophy and arrhythmia post-MI has been established, no study has yet investigated its role in the inflammatory process orchestrated by endothelial cells, immune cells, and fibroblasts. This study aims to assess the role of TRPM4 in 1) survival and cardiac function, 2) inflammation, and 3) healing post-MI. We performed ligation of the left coronary artery or sham intervention on 154 Trpm4 WT or KO mice under isoflurane anesthesia. Survival and echocardiographic functions were monitored up to 5 wk. We collected serum during the acute post-MI phase to analyze proteomes and performed single-cell RNA sequencing on nonmyocytic cells of hearts after 24 and 72 h. Lastly, we assessed chronic fibrosis and angiogenesis. We observed no significant differences in survival or cardiac function, even though our proteomics data showed significantly decreased tissue injury markers (i.e., creatine kinase M and VE-cadherin) in KO serum after 12 h. On the other hand, inflammation, characterized by serum amyloid P component in the serum, higher number of recruited granulocytes, inflammatory monocytes, and macrophages, as well as expression of proinflammatory genes, was significantly higher in KO. This correlated with increased chronic cardiac fibrosis and angiogenesis. Since inflammation and fibrosis are closely linked to adverse remodeling, future therapeutic attempts at inhibiting TRPM4 will need to assess these parameters carefully before proceeding with translational studies.NEW & NOTEWORTHY Deletion of Trpm4 increases markers of cardiac and systemic inflammation within the first 24 h after MI, while inducing an earlier fibrotic transition at 72 h and more overall chronic fibrosis and angiogenesis at 5 wk. The descriptive, robust, and methodologically broad approach of this study sheds light on an important caveat that will need to be taken into account in all future therapeutic attempts to inhibit TRPM4 post-MI.
Collapse
Affiliation(s)
- Mey Boukenna
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research TransCure, University of Bern, Bern, Switzerland
- Department of Cardiology, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Jean-Sébastien Rougier
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research TransCure, University of Bern, Bern, Switzerland
| | - Parisa Aghagolzadeh
- Experimental Cardiology Unit, Department of Cardiovascular Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Sylvain Pradervand
- Centre d'Oncologie de Précision, Département d'Oncologie, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Sabrina Guichard
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research TransCure, University of Bern, Bern, Switzerland
| | - Anne-Flore Hämmerli
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research TransCure, University of Bern, Bern, Switzerland
| | - Thierry Pedrazzini
- Experimental Cardiology Unit, Department of Cardiovascular Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Hugues Abriel
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research TransCure, University of Bern, Bern, Switzerland
| |
Collapse
|
5
|
Simard C, Aize M, Chaigne S, Mpweme Bangando H, Guinamard R. Ion Channels in the Development and Remodeling of the Aortic Valve. Int J Mol Sci 2023; 24:5860. [PMID: 36982932 PMCID: PMC10055105 DOI: 10.3390/ijms24065860] [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: 03/07/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/30/2023] Open
Abstract
The role of ion channels is extensively described in the context of the electrical activity of excitable cells and in excitation-contraction coupling. They are, through this phenomenon, a key element for cardiac activity and its dysfunction. They also participate in cardiac morphological remodeling, in particular in situations of hypertrophy. Alongside this, a new field of exploration concerns the role of ion channels in valve development and remodeling. Cardiac valves are important components in the coordinated functioning of the heart by ensuring unidirectional circulation essential to the good efficiency of the cardiac pump. In this review, we will focus on the ion channels involved in both the development and/or the pathological remodeling of the aortic valve. Regarding valve development, mutations in genes encoding for several ion channels have been observed in patients suffering from malformation, including the bicuspid aortic valve. Ion channels were also reported to be involved in the morphological remodeling of the valve, characterized by the development of fibrosis and calcification of the leaflets leading to aortic stenosis. The final stage of aortic stenosis requires, until now, the replacement of the valve. Thus, understanding the role of ion channels in the progression of aortic stenosis is an essential step in designing new therapeutic approaches in order to avoid valve replacement.
Collapse
Affiliation(s)
- Christophe Simard
- UR 4650, Physiopathologie et Stratégies d’Imagerie du Remodelage Cardiovasculaire, GIP Cyceron, Unicaen, 14000 Caen, France
| | - Margaux Aize
- UR 4650, Physiopathologie et Stratégies d’Imagerie du Remodelage Cardiovasculaire, GIP Cyceron, Unicaen, 14000 Caen, France
| | - Sébastien Chaigne
- IHU LIRYC Electrophysiology and Heart Modeling Institute, Foundation Bordeaux, 33600 Pessac, France
- Electrophysiology and Ablation Unit, Bordeaux University Hospital, 33600 Pessac, France
| | - Harlyne Mpweme Bangando
- UR 4650, Physiopathologie et Stratégies d’Imagerie du Remodelage Cardiovasculaire, GIP Cyceron, Unicaen, 14000 Caen, France
| | - Romain Guinamard
- UR 4650, Physiopathologie et Stratégies d’Imagerie du Remodelage Cardiovasculaire, GIP Cyceron, Unicaen, 14000 Caen, France
| |
Collapse
|
6
|
Xing C, Bao L, Li W, Fan H. Progress on role of ion channels of cardiac fibroblasts in fibrosis. Front Physiol 2023; 14:1138306. [PMID: 36969589 PMCID: PMC10033868 DOI: 10.3389/fphys.2023.1138306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/27/2023] [Indexed: 03/29/2023] Open
Abstract
Cardiac fibrosis is defined as excessive deposition of extracellular matrix (ECM) in pathological conditions. Cardiac fibroblasts (CFs) activated by injury or inflammation differentiate into myofibroblasts (MFs) with secretory and contractile functions. In the fibrotic heart, MFs produce ECM which is composed mainly of collagen and is initially involved in maintaining tissue integrity. However, persistent fibrosis disrupts the coordination of excitatory contractile coupling, leading to systolic and diastolic dysfunction, and ultimately heart failure. Numerous studies have demonstrated that both voltage- and non-voltage-gated ion channels alter intracellular ion levels and cellular activity, contributing to myofibroblast proliferation, contraction, and secretory function. However, an effective treatment strategy for myocardial fibrosis has not been established. Therefore, this review describes the progress made in research related to transient receptor potential (TRP) channels, Piezo1, Ca2+ release-activated Ca2+ (CRAC) channels, voltage-gated Ca2+ channels (VGCCs), sodium channels, and potassium channels in myocardial fibroblasts with the aim of providing new ideas for treating myocardial fibrosis.
Collapse
|
7
|
TRPM4 Participates in Irradiation-Induced Aortic Valve Remodeling in Mice. Cancers (Basel) 2022; 14:cancers14184477. [PMID: 36139640 PMCID: PMC9497207 DOI: 10.3390/cancers14184477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/09/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Despite its benefit in cancer treatment, thoracic irradiation can induce aortic valve stenosis with fibrosis and calcification. The TRPM4 cation channel is known to participate in cellular remodeling including the transition of cardiac fibroblasts to myofibroblasts, similar to that observed during aortic valve stenosis. This study evaluates if TRPM4 is involved in irradiation-induced aortic valve damage. The aortic valve of mice was targeted by irradiation. Cardiac echography 5 months after treatment revealed an increase in aortic jet velocity, indicating stenosis. This was not observed in non-treated animals. Histological analysis revealed an increase in valvular cusp surface associated with fibrosis which was not observed in non-treated animals. The experiments were reproduced on mice after Trpm4 gene disruption. In these animals, irradiation did not induce valvular remodeling. It indicates that TRPM4 influences irradiation-induced aortic valve damage and thus could be a target to prevent such side effects of irradiation. Abstract Thoracic radiotherapy can lead to cardiac remodeling including valvular stenosis due to fibrosis and calcification. The monovalent non-selective cation channel TRPM4 is known to be involved in calcium handling and to participate in fibroblast transition to myofibroblasts, a phenomenon observed during aortic valve stenosis. The goal of this study was to evaluate if TRPM4 is involved in irradiation-induced aortic valve damage. Four-month-old Trpm4+/+ and Trpm4−/− mice received 10 Gy irradiation at the aortic valve. Cardiac parameters were evaluated by echography until 5 months post-irradiation, then hearts were collected for morphological and histological assessments. At the onset of the protocol, Trpm4+/+ and Trpm4−/− mice exhibited similar maximal aortic valve jet velocity and mean pressure gradient. Five months after irradiation, Trpm4+/+ mice exhibited a significant increase in those parameters, compared to the untreated animals while no variation was detected in Trpm4−/− mice. Morphological analysis revealed that irradiated Trpm4+/+ mice exhibited a 53% significant increase in the aortic valve cusp surface while no significant variation was observed in Trpm4−/− animals. Collagen staining revealed aortic valve fibrosis in irradiated Trpm4+/+ mice but not in irradiated Trpm4−/− animals. It indicates that TRPM4 influences irradiation-induced valvular remodeling.
Collapse
|
8
|
Malysz J, Maxwell SE, Petkov GV. Differential effects of TRPM4 channel inhibitors on Guinea pig urinary bladder smooth muscle excitability and contractility: Novel 4-chloro-2-[2-(2-chloro-phenoxy)-acetylamino]-benzoic acid (CBA) versus classical 9-phenanthrol. Pharmacol Res Perspect 2022; 10:e00982. [PMID: 35822549 PMCID: PMC9277609 DOI: 10.1002/prp2.982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 11/06/2022] Open
Abstract
Non-selective cation channels in urinary bladder smooth muscle (UBSM) are thought to mediate increases in cellular excitability and contractility. For transient receptor potential melastatin type-4 (TRPM4) channels, the evidence primarily relies on the inhibitor 9-phenanthrol, which exhibits pharmacological limitations. Recently, 4-chloro-2-[2-(2-chloro-phenoxy)-acetylamino]-benzoic acid (CBA) has been discovered as a novel TRPM4 channel blocker. We examined how, in comparison to 9-phenanthrol, CBA affects the excitability of freshly isolated guinea pig UBSM cells and the contractility of UBSM strips. Additionally, non-selective TRPM4 channel inhibitor flufenamic acid (FFA) and potentiator BTP2 (also known as YM-58483) were studied in UBSM cells. Unlike robust inhibition for 9-phenanthrol already known, CBA (up to 100 μM) displayed either no or a very weak reduction (<20%) in spontaneous phasic, 20 mM KCl-induced, and electrical field stimulated contractions. For 300 μM CBA, reductions were higher except for an increase in the frequency of KCl-induced contractions. In UBSM cells, examined under amphotericin B-perforated patch-clamp, CBA (30 μM) did not affect the membrane potential (I = 0) or voltage step-induced whole-cell cation currents, sensitive to 9-phenanthrol. The currents were not inhibited by FFA (100 μM), increased by BTP2 (10 μM), nor enhanced under a strongly depolarizing holding voltage of -16 or + 6 mV (vs. -74 mV). None of the three compounds affected the cell capacitance, unlike 9-phenanthrol. In summary, the novel inhibitor CBA and nonselective FFA did not mimic the inhibitory properties of 9-phenanthrol on UBSM function. These results suggest that TRPM4 channels, although expressed in UBSM, play a distinct role rather than direct regulation of excitability and contractility.
Collapse
Affiliation(s)
- John Malysz
- Department of Pharmaceutical Sciences, College of PharmacyUniversity of Tennessee Health Science CenterMemphisTennesseeUSA
- Present address:
Department of Physiology and Cell BiologyUniversity of NevadaRenoNevadaUSA
| | - Sarah E. Maxwell
- Department of Pharmaceutical Sciences, College of PharmacyUniversity of Tennessee Health Science CenterMemphisTennesseeUSA
| | - Georgi V. Petkov
- Department of Pharmaceutical Sciences, College of PharmacyUniversity of Tennessee Health Science CenterMemphisTennesseeUSA
| |
Collapse
|
9
|
Pharmacological Modulation and (Patho)Physiological Roles of TRPM4 Channel-Part 2: TRPM4 in Health and Disease. Pharmaceuticals (Basel) 2021; 15:ph15010040. [PMID: 35056097 PMCID: PMC8779181 DOI: 10.3390/ph15010040] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 02/06/2023] Open
Abstract
Transient receptor potential melastatin 4 (TRPM4) is a unique member of the TRPM protein family and, similarly to TRPM5, is Ca2+ sensitive and permeable for monovalent but not divalent cations. It is widely expressed in many organs and is involved in several functions; it regulates membrane potential and Ca2+ homeostasis in both excitable and non-excitable cells. This part of the review discusses the currently available knowledge about the physiological and pathophysiological roles of TRPM4 in various tissues. These include the physiological functions of TRPM4 in the cells of the Langerhans islets of the pancreas, in various immune functions, in the regulation of vascular tone, in respiratory and other neuronal activities, in chemosensation, and in renal and cardiac physiology. TRPM4 contributes to pathological conditions such as overactive bladder, endothelial dysfunction, various types of malignant diseases and central nervous system conditions including stroke and injuries as well as in cardiac conditions such as arrhythmias, hypertrophy, and ischemia-reperfusion injuries. TRPM4 claims more and more attention and is likely to be the topic of research in the future.
Collapse
|
10
|
Jia T, Wang X, Tang Y, Yu W, Li C, Cui S, Zhu J, Meng W, Wang C, Wang Q. Sacubitril Ameliorates Cardiac Fibrosis Through Inhibiting TRPM7 Channel. Front Cell Dev Biol 2021; 9:760035. [PMID: 34778271 PMCID: PMC8586221 DOI: 10.3389/fcell.2021.760035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/11/2021] [Indexed: 12/11/2022] Open
Abstract
Heart failure caused by cardiac fibrosis has become a major challenge of public health worldwide. Cardiomyocyte programmed cell death (PCD) and activation of fibroblasts are crucial pathological features, both of which are associated with aberrant Ca2+ influx. Transient receptor potential cation channel subfamily M member 7 (TRPM7), the major Ca2+ permeable channel, plays a regulatory role in cardiac fibrosis. In this study, we sought to explore the mechanistic details for sacubitril, a component of sacubitril/valsartan, in treating cardiac fibrosis. We demonstrated that sacubitril/valsartan could effectively ameliorate cardiac dysfunction and reduce cardiac fibrosis induced by isoprotereno (ISO) in vivo. We further investigated the anti-fibrotic effect of sacubitril in fibroblasts. LBQ657, the metabolite of sacubitril, could significantly attenuate transforming growth factor-β 1 (TGF-β1) induced cardiac fibrosis by blocking TRPM7 channel, rather than suppressing its protein expression. In addition, LBQ657 reduced hypoxia-induced cardiomyocyte PCD via suppression of Ca2+ influx regulated by TRPM7. These findings suggested that sacubitril ameliorated cardiac fibrosis by acting on both fibroblasts and cardiomyocytes through inhibiting TRPM7 channel.
Collapse
Affiliation(s)
- Tian Jia
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Xiaozhi Wang
- Department of Cardiology, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Yiqun Tang
- Department of Clinical Pharmacy, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Wenying Yu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, China
| | - Chenhui Li
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Shufang Cui
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Juanjuan Zhu
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Wei Meng
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Chen Wang
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Quanyi Wang
- State Key Laboratory of Natural Medicines, Department of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| |
Collapse
|
11
|
Simard C, Ferchaud V, Sallé L, Milliez P, Manrique A, Alexandre J, Guinamard R. TRPM4 Participates in Aldosterone-Salt-Induced Electrical Atrial Remodeling in Mice. Cells 2021; 10:636. [PMID: 33809210 PMCID: PMC7998432 DOI: 10.3390/cells10030636] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/05/2021] [Accepted: 03/10/2021] [Indexed: 12/20/2022] Open
Abstract
Aldosterone plays a major role in atrial structural and electrical remodeling, in particular through Ca2+-transient perturbations and shortening of the action potential. The Ca2+-activated non-selective cation channel Transient Receptor Potential Melastatin 4 (TRPM4) participates in atrial action potential. The aim of our study was to elucidate the interactions between aldosterone and TRPM4 in atrial remodeling and arrhythmias susceptibility. Hyperaldosteronemia, combined with a high salt diet, was induced in mice by subcutaneously implanted osmotic pumps during 4 weeks, delivering aldosterone or physiological serum for control animals. The experiments were conducted in wild type animals (Trpm4+/+) as well as Trpm4 knock-out animals (Trpm4-/-). The atrial diameter measured by echocardiography was higher in Trpm4-/- compared to Trpm4+/+ animals, and hyperaldosteronemia-salt produced a dilatation in both groups. Action potentials duration and triggered arrhythmias were measured using intracellular microelectrodes on the isolated left atrium. Hyperaldosteronemia-salt prolong action potential in Trpm4-/- mice but had no effect on Trpm4+/+ mice. In the control group (no aldosterone-salt treatment), no triggered arrythmias were recorded in Trpm4+/+ mice, but a high level was detected in Trpm4-/- mice. Hyperaldosteronemia-salt enhanced the occurrence of arrhythmias (early as well as delayed-afterdepolarization) in Trpm4+/+ mice but decreased it in Trpm4-/- animals. Atrial connexin43 immunolabelling indicated their disorganization at the intercalated disks and a redistribution at the lateral side induced by hyperaldosteronemia-salt but also by Trpm4 disruption. In addition, hyperaldosteronemia-salt produced pronounced atrial endothelial thickening in both groups. Altogether, our results indicated that hyperaldosteronemia-salt and TRPM4 participate in atrial electrical and structural remodeling. It appears that TRPM4 is involved in aldosterone-induced atrial action potential shortening. In addition, TRPM4 may promote aldosterone-induced atrial arrhythmias, however, the underlying mechanisms remain to be explored.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Romain Guinamard
- EA 4650, Signalisation, Electrophysiologie et Imagerie des Lésions d’Ischémie-Reperfusion Myocardique, GIP Cyceron, Université de Caen Normandie, CHU de Caen, 14032 Caen, France; (C.S.); (V.F.); (L.S.); (P.M.); (A.M.); (J.A.)
| |
Collapse
|
12
|
Feng J, Zong P, Yan J, Yue Z, Li X, Smith C, Ai X, Yue L. Upregulation of transient receptor potential melastatin 4 (TRPM4) in ventricular fibroblasts from heart failure patients. Pflugers Arch 2021; 473:521-531. [PMID: 33594499 PMCID: PMC8857941 DOI: 10.1007/s00424-021-02525-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/19/2022]
Abstract
The transient receptor potential melastatin 4 (TRPM4) is a Ca2+-activated nonselective monovalent cation channel belonging to the TRP channel superfamily. TRPM4 is widely expressed in various tissues and most abundantly expressed in the heart. TRPM4 plays a critical role in cardiac conduction. Patients carrying a gain-of-function or loss-of-function mutation of TRPM4 display impaired cardiac conduction. Knockout or over-expression of TRPM4 in mice recapitulates conduction defects in patients. Moreover, recent studies have indicated that TRPM4 plays a role in hypertrophy and heart failure. Whereas the role of TRPM4 mediated by cardiac myocytes has been well investigated, little is known about TRPM4 and its role in cardiac fibroblasts. Here we show that in human left ventricular fibroblasts, TRPM4 exhibits typical Ca2+-activation characteristics, linear current-voltage (I-V) relation, and monovalent permeability. TRPM4 currents recorded in fibroblasts from heart failure patients (HF) are more than 2-fold bigger than those from control individuals (CTL). The enhanced functional TRPM4 in HF is not resulted from changed channel properties, as TRPM4 currents from both HF and CTL fibroblasts demonstrate similar sensitivity to intracellular calcium activation and extracellular 9-phenanthrol (9-phen) blockade. Consistent with enhanced TRPM4 activity, the protein level of TRPM4 is about 2-fold higher in HF than that of CTL hearts. Moreover, TRPM4 current in CTL fibroblasts is increased after 24 hours of TGFβ1 treatment, implying that TRPM4 in vivo may be upregulated by fibrogenesis promotor TGFβ1. The upregulated TRPM4 in HF fibroblasts suggests that TRPM4 may play a role in cardiac fibrogenesis under various pathological conditions.
Collapse
Affiliation(s)
- Jianlin Feng
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA
| | - Pengyu Zong
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA
| | - Jiajie Yan
- Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Zhichao Yue
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA
| | - Xin Li
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA
| | - Chevaughn Smith
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA
| | - Xun Ai
- Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Lixia Yue
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT, 06030, USA.
| |
Collapse
|