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Luo Z, Zhang X, Fleig A, Romo D, Hull KG, Horgen FD, Sun HS, Feng ZP. TRPM7 in neurodevelopment and therapeutic prospects for neurodegenerative disease. Cell Calcium 2024; 120:102886. [PMID: 38631163 DOI: 10.1016/j.ceca.2024.102886] [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: 12/17/2023] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024]
Abstract
Neurodevelopment, a complex and highly regulated process, plays a foundational role in shaping the structure and function of the nervous system. The transient receptor potential melastatin 7 (TRPM7), a divalent cation channel with an α-kinase domain, mediates a wide range of cellular functions, including proliferation, migration, cell adhesion, and survival, all of which are essential processes in neurodevelopment. The global knockout of either TRPM7 or TRPM7-kinase is embryonically lethal, highlighting the crucial role of TRPM7 in development in vivo. Subsequent research further revealed that TRPM7 is indeed involved in various key processes throughout neurodevelopment, from maintaining pluripotency during embryogenesis to regulating gastrulation, neural tube closure, axonal outgrowth, synaptic density, and learning and memory. Moreover, a discrepancy in TRPM7 expression and/or function has been associated with neuropathological conditions, including ischemic stroke, Alzheimer's disease, and Parkinson's disease. Understanding the mechanisms of proper neurodevelopment may provide us with the knowledge required to develop therapeutic interventions that can overcome the challenges of regeneration in CNS injuries and neurodegenerative diseases. Considering that ion channels are the third-largest class targeted for drug development, TRPM7's dual roles in development and degeneration emphasize its therapeutic potential. This review provides a comprehensive overview of the current literature on TRPM7 in various aspects of neurodevelopment. It also discusses the links between neurodevelopment and neurodegeneration, and highlights TRPM7 as a potential therapeutic target for neurodegenerative disorders, with a focus on repair and regeneration.
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Affiliation(s)
- Zhengwei Luo
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada; Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Xinyang Zhang
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada; Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center and John A. Burns School of Medicine and Cancer Center at the University of Hawaii, Honolulu, HI, 96720, USA
| | - Daniel Romo
- Department of Chemistry & Biochemistry, Baylor University, Waco, TX 76798-7348, USA; The CPRIT Synthesis and Drug-Lead Discovery Laboratory, Baylor University, Waco, TX 76798, USA
| | - Kenneth G Hull
- Department of Chemistry & Biochemistry, Baylor University, Waco, TX 76798-7348, USA
| | - F David Horgen
- Department of Natural Sciences, Hawaii Pacific University, Kaneohe, HI, 96744, USA
| | - Hong-Shuo Sun
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada; Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada; Department of Pharmacology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada; Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, M5S 3M2, Canada.
| | - Zhong-Ping Feng
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada.
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Chubanov V, Köttgen M, Touyz RM, Gudermann T. TRPM channels in health and disease. Nat Rev Nephrol 2024; 20:175-187. [PMID: 37853091 DOI: 10.1038/s41581-023-00777-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2023] [Indexed: 10/20/2023]
Abstract
Different cell channels and transporters tightly regulate cytoplasmic levels and the intraorganelle distribution of cations. Perturbations in these processes lead to human diseases that are frequently associated with kidney impairment. The family of melastatin-related transient receptor potential (TRPM) channels, which has eight members in mammals (TRPM1-TRPM8), includes ion channels that are highly permeable to divalent cations, such as Ca2+, Mg2+ and Zn2+ (TRPM1, TRPM3, TRPM6 and TRPM7), non-selective cation channels (TRPM2 and TRPM8) and monovalent cation-selective channels (TRPM4 and TRPM5). Three family members contain an enzymatic protein moiety: TRPM6 and TRPM7 are fused to α-kinase domains, whereas TRPM2 is linked to an ADP-ribose-binding NUDT9 homology domain. TRPM channels also function as crucial cellular sensors involved in many physiological processes, including mineral homeostasis, blood pressure, cardiac rhythm and immunity, as well as photoreception, taste reception and thermoreception. TRPM channels are abundantly expressed in the kidney. Mutations in TRPM genes cause several inherited human diseases, and preclinical studies in animal models of human disease have highlighted TRPM channels as promising new therapeutic targets. Here, we provide an overview of this rapidly evolving research area and delineate the emerging role of TRPM channels in kidney pathophysiology.
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Affiliation(s)
- Vladimir Chubanov
- Walther-Straub Institute of Pharmacology and Toxicology, LMU Munich, Munich, Germany.
| | - Michael Köttgen
- Renal Division, Department of Medicine, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- CIBSS - Centre for Integrative Biological Signalling Studies, Freiburg, Germany
| | - Rhian M Touyz
- Research Institute of McGill University Health Centre, McGill University, Montreal, Quebec, Canada
| | - Thomas Gudermann
- Walther-Straub Institute of Pharmacology and Toxicology, LMU Munich, Munich, Germany.
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Stefanache A, Lungu II, Butnariu IA, Calin G, Gutu C, Marcu C, Grierosu C, Bogdan Goroftei ER, Duceac LD, Dabija MG, Popa F, Damir D. Understanding How Minerals Contribute to Optimal Immune Function. J Immunol Res 2023; 2023:3355733. [PMID: 37946846 PMCID: PMC10632063 DOI: 10.1155/2023/3355733] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/16/2023] [Accepted: 09/09/2023] [Indexed: 11/12/2023] Open
Abstract
Sufficient mineral supply is vital not only for the innate immune system but also for the components of the adaptive immune defense, which encompass defense mechanisms against pathogens and the delicate balance of pro- and anti-inflammatory regulation in the long term. Generally, a well-balanced diet is capable of providing the necessary minerals to support the immune system. Nevertheless, specific vulnerable populations should be cautious about obtaining adequate amounts of minerals such as magnesium, zinc, copper, iron, and selenium. Inadequate levels of these minerals can temporarily impair immune competence and disrupt the long-term regulation of systemic inflammation. Therefore, comprehending the mechanisms and sources of these minerals is crucial. In exceptional circumstances, mineral deficiencies may necessitate supplementation; however, excessive intake of supplements can have adverse effects on the immune system and should be avoided. Consequently, any supplementation should be approved by medical professionals and administered in recommended doses. This review emphasizes the crucial significance of minerals in promoting optimal functioning of the immune system. It investigates the indispensable minerals required for immune system function and the regulation of inflammation. Moreover, it delves into the significance of maintaining an optimized intake of minerals from a nutritional standpoint.
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Affiliation(s)
- Alina Stefanache
- “Grigore T. Popa” University of Medicine and Pharmacy, Iasi 700115, Romania
| | - Ionut-Iulian Lungu
- “Grigore T. Popa” University of Medicine and Pharmacy, Iasi 700115, Romania
| | | | - Gabriela Calin
- Faculty of Dental Medicine, “Apollonia” University of Iasi, 11 Pacurari Street, Iasi 700511, Romania
| | - Cristian Gutu
- Faculty of Medicine and Pharmacy, University Dunarea de Jos, 47 Domneasca Street, Galati 800008, Romania
| | - Constantin Marcu
- Faculty of Medicine and Pharmacy, University Dunarea de Jos, 47 Domneasca Street, Galati 800008, Romania
| | - Carmen Grierosu
- Faculty of Dental Medicine, “Apollonia” University of Iasi, 11 Pacurari Street, Iasi 700511, Romania
| | | | - Letitia-Doina Duceac
- Faculty of Medicine and Pharmacy, University Dunarea de Jos, 47 Domneasca Street, Galati 800008, Romania
| | | | - Florina Popa
- Faculty of Medicine and Pharmacy, University Dunarea de Jos, 47 Domneasca Street, Galati 800008, Romania
| | - Daniela Damir
- “Grigore T. Popa” University of Medicine and Pharmacy, Iasi 700115, Romania
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Okada Y, Numata T, Sabirov RZ, Kashio M, Merzlyak PG, Sato-Numata K. Cell death induction and protection by activation of ubiquitously expressed anion/cation channels. Part 3: the roles and properties of TRPM2 and TRPM7. Front Cell Dev Biol 2023; 11:1246955. [PMID: 37842082 PMCID: PMC10576435 DOI: 10.3389/fcell.2023.1246955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
Cell volume regulation (CVR) is a prerequisite for animal cells to survive and fulfill their functions. CVR dysfunction is essentially involved in the induction of cell death. In fact, sustained normotonic cell swelling and shrinkage are associated with necrosis and apoptosis, and thus called the necrotic volume increase (NVI) and the apoptotic volume decrease (AVD), respectively. Since a number of ubiquitously expressed ion channels are involved in the CVR processes, these volume-regulatory ion channels are also implicated in the NVI and AVD events. In Part 1 and Part 2 of this series of review articles, we described the roles of swelling-activated anion channels called VSOR or VRAC and acid-activated anion channels called ASOR or PAC in CVR and cell death processes. Here, Part 3 focuses on therein roles of Ca2+-permeable non-selective TRPM2 and TRPM7 cation channels activated by stress. First, we summarize their phenotypic properties and molecular structure. Second, we describe their roles in CVR. Since cell death induction is tightly coupled to dysfunction of CVR, third, we focus on their participation in the induction of or protection against cell death under oxidative, acidotoxic, excitotoxic, and ischemic conditions. In this regard, we pay attention to the sensitivity of TRPM2 and TRPM7 to a variety of stress as well as to their capability to physicall and functionally interact with other volume-related channels and membrane enzymes. Also, we summarize a large number of reports hitherto published in which TRPM2 and TRPM7 channels are shown to be involved in cell death associated with a variety of diseases or disorders, in some cases as double-edged swords. Lastly, we attempt to describe how TRPM2 and TRPM7 are organized in the ionic mechanisms leading to cell death induction and protection.
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Affiliation(s)
- Yasunobu Okada
- National Institute for Physiological Sciences (NIPS), Okazaki, Japan
- Department of Integrative Physiology, Graduate School of Medicine, AkitaUniversity, Akita, Japan
- Department of Physiology, School of Medicine, Aichi Medical Uniersity, Nagakute, Japan
- Department of Physiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Cardiovascular Research Institute, Yokohama City University, Yokohama, Japan
| | - Tomohiro Numata
- Department of Integrative Physiology, Graduate School of Medicine, AkitaUniversity, Akita, Japan
| | - Ravshan Z. Sabirov
- Institute of Biophysics and Biochemistry, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Makiko Kashio
- National Institute for Physiological Sciences (NIPS), Okazaki, Japan
- Department of Physiology, School of Medicine, Aichi Medical Uniersity, Nagakute, Japan
| | - Peter G. Merzlyak
- Institute of Biophysics and Biochemistry, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Kaori Sato-Numata
- Department of Integrative Physiology, Graduate School of Medicine, AkitaUniversity, Akita, Japan
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Hoeger B, Nadolni W, Hampe S, Hoelting K, Fraticelli M, Zaborsky N, Madlmayr A, Sperrer V, Fraticelli L, Addington L, Steinritz D, Chubanov V, Geisberger R, Greil R, Breit A, Boekhoff I, Gudermann T, Zierler S. Inactivation of TRPM7 Kinase Targets AKT Signaling and Cyclooxygenase-2 Expression in Human CML Cells. FUNCTION 2023; 4:zqad053. [PMID: 37786778 PMCID: PMC10541797 DOI: 10.1093/function/zqad053] [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: 07/12/2023] [Revised: 09/01/2023] [Accepted: 09/11/2023] [Indexed: 10/04/2023] Open
Abstract
Cyclooxygenase-2 (COX-2) is a key regulator of inflammation. High constitutive COX-2 expression enhances survival and proliferation of cancer cells, and adversely impacts antitumor immunity. The expression of COX-2 is modulated by various signaling pathways. Recently, we identified the melastatin-like transient-receptor-potential-7 (TRPM7) channel-kinase as modulator of immune homeostasis. TRPM7 protein is essential for leukocyte proliferation and differentiation, and upregulated in several cancers. It comprises of a cation channel and an atypical α-kinase, linked to inflammatory cell signals and associated with hallmarks of tumor progression. A role in leukemia has not been established, and signaling pathways are yet to be deciphered. We show that inhibiting TRPM7 channel-kinase in chronic myeloid leukemia (CML) cells results in reduced constitutive COX-2 expression. By utilizing a CML-derived cell line, HAP1, harboring CRISPR/Cas9-mediated TRPM7 knockout, or a point mutation inactivating TRPM7 kinase, we could link this to reduced activation of AKT serine/threonine kinase and mothers against decapentaplegic homolog 2 (SMAD2). We identified AKT as a direct in vitro substrate of TRPM7 kinase. Pharmacologic blockade of TRPM7 in wildtype HAP1 cells confirmed the effect on COX-2 via altered AKT signaling. Addition of an AKT activator on TRPM7 kinase-dead cells reconstituted the wildtype phenotype. Inhibition of TRPM7 resulted in reduced phosphorylation of AKT and diminished COX-2 expression in peripheral blood mononuclear cells derived from CML patients, and reduced proliferation in patient-derived CD34+ cells. These results highlight a role of TRPM7 kinase in AKT-driven COX-2 expression and suggest a beneficial potential of TRPM7 blockade in COX-2-related inflammation and malignancy.
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Affiliation(s)
- Birgit Hoeger
- Institute of Pharmacology, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz and Krankenhausstr. 5, 4020 Linz, Austria
| | - Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Sarah Hampe
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Kilian Hoelting
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Marco Fraticelli
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Nadja Zaborsky
- Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Oncologic Center, Paracelsus Medical University, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute–Laboratory for Immunological and Molecular Cancer Research (SCRI–LIMCR), Müllner Hauptstr. 48, 5020 Salzburg, Austria
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Anna Madlmayr
- Institute of Pharmacology, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz and Krankenhausstr. 5, 4020 Linz, Austria
| | - Viktoria Sperrer
- Institute of Pharmacology, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz and Krankenhausstr. 5, 4020 Linz, Austria
| | - Laura Fraticelli
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Lynda Addington
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Dirk Steinritz
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Vladimir Chubanov
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Roland Geisberger
- Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Oncologic Center, Paracelsus Medical University, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute–Laboratory for Immunological and Molecular Cancer Research (SCRI–LIMCR), Müllner Hauptstr. 48, 5020 Salzburg, Austria
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Richard Greil
- Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Oncologic Center, Paracelsus Medical University, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute–Laboratory for Immunological and Molecular Cancer Research (SCRI–LIMCR), Müllner Hauptstr. 48, 5020 Salzburg, Austria
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Andreas Breit
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Ingrid Boekhoff
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
| | - Susanna Zierler
- Institute of Pharmacology, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz and Krankenhausstr. 5, 4020 Linz, Austria
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Goethestr. 33, 80336 Munich, Germany
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Ciaglia T, Vestuto V, Bertamino A, González-Muñiz R, Gómez-Monterrey I. On the modulation of TRPM channels: Current perspectives and anticancer therapeutic implications. Front Oncol 2023; 12:1065935. [PMID: 36844925 PMCID: PMC9948629 DOI: 10.3389/fonc.2022.1065935] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 12/15/2022] [Indexed: 02/11/2023] Open
Abstract
The transient melastatin receptor potential (TRPM) ion channel subfamily functions as cellular sensors and transducers of critical biological signal pathways by regulating ion homeostasis. Some members of TRPM have been cloned from cancerous tissues, and their abnormal expressions in various solid malignancies have been correlated with cancer cell growth, survival, or death. Recent evidence also highlights the mechanisms underlying the role of TRPMs in tumor epithelial-mesenchymal transition (EMT), autophagy, and cancer metabolic reprogramming. These implications support TRPM channels as potential molecular targets and their modulation as an innovative therapeutic approach against cancer. Here, we discuss the general characteristics of the different TRPMs, focusing on current knowledge about the connection between TRPM channels and critical features of cancer. We also cover TRPM modulators used as pharmaceutical tools in biological trials and an indication of the only clinical trial with a TRPM modulator about cancer. To conclude, the authors describe the prospects for TRPM channels in oncology.
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Affiliation(s)
- Tania Ciaglia
- Dipartimento di Farmacia (DIFARMA), Università degli Studi di Salerno, Fisciano, Italy
| | - Vincenzo Vestuto
- Dipartimento di Farmacia (DIFARMA), Università degli Studi di Salerno, Fisciano, Italy
| | - Alessia Bertamino
- Dipartimento di Farmacia (DIFARMA), Università degli Studi di Salerno, Fisciano, Italy
| | - Rosario González-Muñiz
- Departamento de Biomiméticos, Instituto de Química Médica, Madrid, Spain,*Correspondence: Isabel Gómez-Monterrey, ; Rosario González-Muñiz,
| | - Isabel Gómez-Monterrey
- Dipartimento di Farmacia, Università degli Studi di Napoli “Federico II”, Naples, Italy,*Correspondence: Isabel Gómez-Monterrey, ; Rosario González-Muñiz,
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7
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Liu Q, Li S, Qiu Y, Zhang J, Rios FJ, Zou Z, Touyz RM. Cardiovascular toxicity of tyrosine kinase inhibitors during cancer treatment: Potential involvement of TRPM7. Front Cardiovasc Med 2023; 10:1002438. [PMID: 36818331 PMCID: PMC9936099 DOI: 10.3389/fcvm.2023.1002438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 01/18/2023] [Indexed: 02/05/2023] Open
Abstract
Receptor tyrosine kinases (RTKs) are a class of membrane spanning cell-surface receptors that transmit extracellular signals through the membrane to trigger diverse intracellular signaling through tyrosine kinases (TKs), and play important role in cancer development. Therapeutic approaches targeting RTKs such as vascular endothelial growth factor receptor (VEGFR), epidermal growth factor receptor (EGFR), and platelet-derived growth factor receptor (PDGFR), and TKs, such as c-Src, ABL, JAK, are widely used to treat human cancers. Despite favorable benefits in cancer treatment that prolong survival, these tyrosine kinase inhibitors (TKIs) and monoclonal antibodies targeting RTKs are also accompanied by adverse effects, including cardiovascular toxicity. Mechanisms underlying TKI-induced cardiovascular toxicity remain unclear. The transient receptor potential melastatin-subfamily member 7 (TRPM7) is a ubiquitously expressed chanzyme consisting of a membrane-based ion channel and intracellular α-kinase. TRPM7 is a cation channel that regulates transmembrane Mg2+ and Ca2+ and is involved in a variety of (patho)physiological processes in the cardiovascular system, contributing to hypertension, cardiac fibrosis, inflammation, and atrial arrhythmias. Of importance, we and others demonstrated significant cross-talk between TRPM7, RTKs, and TK signaling in different cell types including vascular smooth muscle cells (VSMCs), which might be a link between TKIs and their cardiovascular effects. In this review, we summarize the implications of RTK inhibitors (RTKIs) and TKIs in cardiovascular toxicities during anti-cancer treatment, with a focus on the potential role of TRPM7/Mg2+ as a mediator of RTKI/TKI-induced cardiovascular toxicity. We also describe the important role of TRPM7 in cancer development and cardiovascular diseases, and the interaction between TRPM7 and RTKs, providing insights for possible mechanisms underlying cardiovascular disease in cancer patients treated with RTKI/TKIs.
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Affiliation(s)
- Qing Liu
- Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China,Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Suyao Li
- Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yuran Qiu
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jiayu Zhang
- Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Francisco J. Rios
- Research Institute of McGill University Health Centre, McGill University, Montreal, QC, Canada
| | - Zhiguo Zou
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,Zhiguo Zou ✉
| | - Rhian M. Touyz
- Research Institute of McGill University Health Centre, McGill University, Montreal, QC, Canada,*Correspondence: Rhian M. Touyz ✉
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Liu H, Dilger JP, Lin J. A pan-cancer-bioinformatic-based literature review of TRPM7 in cancers. Pharmacol Ther 2022; 240:108302. [PMID: 36332746 DOI: 10.1016/j.pharmthera.2022.108302] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022]
Abstract
TRPM7, a divalent cation-selective channel with kinase domains, has been widely reported to potentially affect cancers. In this study, we conducted multiple bioinformatic analyses based on open databases and reviewed articles that provided evidence for the effects of TRPM7 on cancers. The purposes of this paper are 1) to provide a pan-cancer overview of TRPM7 in cancers; 2) to summarize evidence of TRPM7 effects on cancers; 3) to identify potential future studies of TRPM7 in cancer. Bioinformatics analysis revealed that no cancer-related TRPM7 mutation was found. TRPM7 is aberrantly expressed in most cancer types but the cancer-noncancer expression pattern varies across cancer types. TRPM7 was not associated with survival, TMB, or cancer stemness in most cancer types. TRPM7 affected drug sensitivity and tumor immunity in some cancer types. The in vitro evidence, preclinical in vivo evidence, and clinical evidence for TRPM7 effects on cancers as well as TRPM7 kinase substrate and TRPM7-targeting drugs associated with cancers were summarized to facilitate comparison. We matched the bioinformatics evidence to literature evidence, thereby unveiling potential avenues for future investigation of TRPM7 in cancers. We believe that this paper will help orient research toward important and relevant aspects of the role of TRPM7 in cancers.
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Affiliation(s)
- Hengrui Liu
- Department of Anesthesiology, Health Science Center, Stony Brook University, Stony Brook, NY 11794, USA
| | - James P Dilger
- Department of Anesthesiology, Health Science Center, Stony Brook University, Stony Brook, NY 11794, USA
| | - Jun Lin
- Department of Anesthesiology, Health Science Center, Stony Brook University, Stony Brook, NY 11794, USA.
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Dewdney B, Ursich L, Fletcher EV, Johns TG. Anoctamins and Calcium Signalling: An Obstacle to EGFR Targeted Therapy in Glioblastoma? Cancers (Basel) 2022; 14:cancers14235932. [PMID: 36497413 PMCID: PMC9740065 DOI: 10.3390/cancers14235932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
Glioblastoma is the most common form of high-grade glioma in adults and has a poor survival rate with very limited treatment options. There have been no significant advancements in glioblastoma treatment in over 30 years. Epidermal growth factor receptor is upregulated in most glioblastoma tumours and, therefore, has been a drug target in recent targeted therapy clinical trials. However, while many inhibitors and antibodies for epidermal growth factor receptor have demonstrated promising anti-tumour effects in preclinical models, they have failed to improve outcomes for glioblastoma patients in clinical trials. This is likely due to the highly plastic nature of glioblastoma tumours, which results in therapeutic resistance. Ion channels are instrumental in the development of many cancers and may regulate cellular plasticity in glioblastoma. This review will explore the potential involvement of a class of calcium-activated chloride channels called anoctamins in brain cancer. We will also discuss the integrated role of calcium channels and anoctamins in regulating calcium-mediated signalling pathways, such as epidermal growth factor signalling, to promote brain cancer cell growth and migration.
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Affiliation(s)
- Brittany Dewdney
- Cancer Centre, Telethon Kids Institute, Perth, WA 6009, Australia
- Centre for Child Health Research, University of Western Australia, Perth, WA 6009, Australia
- Correspondence: ; Tel.: +61-8-6319-1023
| | - Lauren Ursich
- Cancer Centre, Telethon Kids Institute, Perth, WA 6009, Australia
- School of Biomedical Sciences, University of Western Australia, Perth, WA 6009, Australia
| | - Emily V. Fletcher
- Cancer Centre, Telethon Kids Institute, Perth, WA 6009, Australia
- Centre for Child Health Research, University of Western Australia, Perth, WA 6009, Australia
| | - Terrance G. Johns
- Cancer Centre, Telethon Kids Institute, Perth, WA 6009, Australia
- Centre for Child Health Research, University of Western Australia, Perth, WA 6009, Australia
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10
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Kazandzhieva K, Mammadova-Bach E, Dietrich A, Gudermann T, Braun A. TRP channel function in platelets and megakaryocytes: basic mechanisms and pathophysiological impact. Pharmacol Ther 2022; 237:108164. [PMID: 35247518 DOI: 10.1016/j.pharmthera.2022.108164] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/29/2022] [Accepted: 02/28/2022] [Indexed: 12/30/2022]
Abstract
Transient receptor potential (TRP) proteins form a superfamily of cation channels that are expressed in a wide range of tissues and cell types. During the last years, great progress has been made in understanding the molecular complexity and the functions of TRP channels in diverse cellular processes, including cell proliferation, migration, adhesion and activation. The diversity of functions depends on multiple regulatory mechanisms by which TRP channels regulate Ca2+ entry mechanisms and intracellular Ca2+ dynamics, either through membrane depolarization involving cation influx or store- and receptor-operated mechanisms. Abnormal function or expression of TRP channels results in vascular pathologies, including hypertension, ischemic stroke and inflammatory disorders through effects on vascular cells, including the components of blood vessels and platelets. Moreover, some TRP family members also regulate megakaryopoiesis and platelet production, indicating a complex role of TRP channels in pathophysiological conditions. In this review, we describe potential roles of TRP channels in megakaryocytes and platelets, as well as their contribution to diseases such as thrombocytopenia, thrombosis and stroke. We also critically discuss the potential of TRP channels as possible targets for disease prevention and treatment.
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Affiliation(s)
- Kalina Kazandzhieva
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Elmina Mammadova-Bach
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany; Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Alexander Dietrich
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany; German Center for Lung Research (DZL), Munich, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany; German Center for Lung Research (DZL), Munich, Germany.
| | - Attila Braun
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.
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11
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Souza Bomfim GH, Niemeyer BA, Lacruz RS, Lis A. On the Connections between TRPM Channels and SOCE. Cells 2022; 11:1190. [PMID: 35406753 PMCID: PMC8997886 DOI: 10.3390/cells11071190] [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: 01/31/2022] [Revised: 03/23/2022] [Accepted: 03/30/2022] [Indexed: 12/02/2022] Open
Abstract
Plasma membrane protein channels provide a passageway for ions to access the intracellular milieu. Rapid entry of calcium ions into cells is controlled mostly by ion channels, while Ca2+-ATPases and Ca2+ exchangers ensure that cytosolic Ca2+ levels ([Ca2+]cyt) are maintained at low (~100 nM) concentrations. Some channels, such as the Ca2+-release-activated Ca2+ (CRAC) channels and voltage-dependent Ca2+ channels (CACNAs), are highly Ca2+-selective, while others, including the Transient Receptor Potential Melastatin (TRPM) family, have broader selectivity and are mostly permeable to monovalent and divalent cations. Activation of CRAC channels involves the coupling between ORAI1-3 channels with the endoplasmic reticulum (ER) located Ca2+ store sensor, Stromal Interaction Molecules 1-2 (STIM1/2), a pathway also termed store-operated Ca2+ entry (SOCE). The TRPM family is formed by 8 members (TRPM1-8) permeable to Mg2+, Ca2+, Zn2+ and Na+ cations, and is activated by multiple stimuli. Recent studies indicated that SOCE and TRPM structure-function are interlinked in some instances, although the molecular details of this interaction are only emerging. Here we review the role of TRPM and SOCE in Ca2+ handling and highlight the available evidence for this interaction.
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Affiliation(s)
- Guilherme H. Souza Bomfim
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, NY 10010, USA;
| | - Barbara A. Niemeyer
- Department of Molecular Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, 66421 Homburg, Germany;
| | - Rodrigo S. Lacruz
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, NY 10010, USA;
| | - Annette Lis
- Department of Biophysics, Center for Integrative Physiology and Molecular Medicine, School of Medicine, Saarland University, 66421 Homburg, Germany
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12
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Weyh C, Krüger K, Peeling P, Castell L. The Role of Minerals in the Optimal Functioning of the Immune System. Nutrients 2022; 14:nu14030644. [PMID: 35277003 PMCID: PMC8840645 DOI: 10.3390/nu14030644] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 01/28/2022] [Accepted: 02/01/2022] [Indexed: 02/04/2023] Open
Abstract
Minerals fulfil a wide variety of functions in the optimal functioning of the immune system. This review reports on the minerals that are essential for the immune system’s function and inflammation regulation. We also discuss nutritional aspects of optimized mineral supply. The supply of minerals is important for the optimal function of the innate immune system as well as for components of adaptive immune defense; this involves defense mechanisms against pathogens in addition to the long-term balance of pro- and anti-inflammatory regulation. Generally, a balanced diet is sufficient to supply the required balance of minerals to help support the immune system. Although a mineral deficiency is rare, there are nevertheless at-risk groups who should pay attention to ensure they are receiving a sufficient supply of minerals such as magnesium, zinc, copper, iron, and selenium. A deficiency in any of these minerals could temporarily reduce immune competence, or even disrupt systemic inflammation regulation in the long term. Therefore, knowledge of the mechanisms and supply of these minerals is important. In exceptional cases, a deficiency should be compensated by supplementation; however, supplement over-consumption may be negative to the immune system, and should be avoided. Accordingly, any supplementation should be medically clarified and should only be administered in prescribed concentrations.
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Affiliation(s)
- Christopher Weyh
- Department of Exercise Physiology and Sports Therapy, Institute of Sports Science, University of Giessen, 35394 Giessen, Germany;
| | - Karsten Krüger
- Department of Exercise Physiology and Sports Therapy, Institute of Sports Science, University of Giessen, 35394 Giessen, Germany;
- Correspondence:
| | - Peter Peeling
- School of Human Sciences (Sport and Exercise Science), University of Western Australia, Crawley, WA 6009, Australia;
- Western Australian Institute of Sport, Mt Claremont, WA 6010, Australia
| | - Lindy Castell
- Green Templeton College, University of Oxford, Oxford OX2 6HG, UK;
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13
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Ji D, Fleig A, Horgen FD, Feng ZP, Sun HS. Modulators of TRPM7 and its potential as a drug target for brain tumours. Cell Calcium 2021; 101:102521. [PMID: 34953296 DOI: 10.1016/j.ceca.2021.102521] [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: 09/29/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 12/14/2022]
Abstract
TRPM7 is a non-selective divalent cation channel with an alpha-kinase domain. Corresponding with its broad expression, TRPM7 has a role in a wide range of cell functions, including proliferation, migration, and survival. Growing evidence shows that TRPM7 is also aberrantly expressed in various cancers, including brain cancers. Because ion channels have widespread tissue distribution and result in extensive physiological consequences when dysfunctional, these proteins can be compelling drug targets. In fact, ion channels comprise the third-largest drug target type, following enzymes and receptors. Literature has shown that suppression of TRPM7 results in inhibition of migration, invasion, and proliferation in several human brain tumours. Therefore, TRPM7 presents a potential target for therapeutic brain tumour interventions. This article reviews current literature on TRPM7 as a potential drug target in the context of brain tumours and provides an overview of various selective and non-selective modulators of the channel relevant to pharmacology, oncology, and ion channel function.
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Affiliation(s)
- Delphine Ji
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8
| | - Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center and John A. Burns School of Medicine and Cancer Center at the University of Hawaii, Honolulu, Hawaii 96813, USA
| | - F David Horgen
- Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii 96744, USA
| | - Zhong-Ping Feng
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8.
| | - Hong-Shuo Sun
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8; Department of Pharmacology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8; Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2.
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14
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Wu D, Saleem M, He T, He G. The Mechanism of Metal Homeostasis in Plants: A New View on the Synergistic Regulation Pathway of Membrane Proteins, Lipids and Metal Ions. MEMBRANES 2021; 11:membranes11120984. [PMID: 34940485 PMCID: PMC8706360 DOI: 10.3390/membranes11120984] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/04/2021] [Accepted: 12/11/2021] [Indexed: 12/15/2022]
Abstract
Heavy metal stress (HMS) is one of the most destructive abiotic stresses which seriously affects the growth and development of plants. Recent studies have shown significant progress in understanding the molecular mechanisms underlying plant tolerance to HMS. In general, three core signals are involved in plants' responses to HMS; these are mitogen-activated protein kinase (MAPK), calcium, and hormonal (abscisic acid) signals. In addition to these signal components, other regulatory factors, such as microRNAs and membrane proteins, also play an important role in regulating HMS responses in plants. Membrane proteins interact with the highly complex and heterogeneous lipids in the plant cell environment. The function of membrane proteins is affected by the interactions between lipids and lipid-membrane proteins. Our review findings also indicate the possibility of membrane protein-lipid-metal ion interactions in regulating metal homeostasis in plant cells. In this review, we investigated the role of membrane proteins with specific substrate recognition in regulating cell metal homeostasis. The understanding of the possible interaction networks and upstream and downstream pathways is developed. In addition, possible interactions between membrane proteins, metal ions, and lipids are discussed to provide new ideas for studying metal homeostasis in plant cells.
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Affiliation(s)
- Danxia Wu
- College of Agricultural, Guizhou University, Guiyang 550025, China;
| | - Muhammad Saleem
- Department of Biological Sciences, Alabama State University, Montgomery, AL 36104, USA;
| | - Tengbing He
- College of Agricultural, Guizhou University, Guiyang 550025, China;
- Institute of New Rural Development, West Campus, Guizhou University, Guiyang 550025, China
- Correspondence: (T.H.); (G.H.)
| | - Guandi He
- College of Agricultural, Guizhou University, Guiyang 550025, China;
- Correspondence: (T.H.); (G.H.)
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15
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Characterization of IL-2 Stimulation and TRPM7 Pharmacomodulation in NK Cell Cytotoxicity and Channel Co-Localization with PIP 2 in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Patients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182211879. [PMID: 34831634 PMCID: PMC8618557 DOI: 10.3390/ijerph182211879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/30/2021] [Accepted: 11/08/2021] [Indexed: 12/01/2022]
Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex multisystemic disorder responsible for significant disability. Although a unifying etiology for ME/CFS is uncertain, impaired natural killer (NK) cell cytotoxicity represents a consistent and measurable feature of this disorder. Research utilizing patient-derived NK cells has implicated dysregulated calcium (Ca2+) signaling, dysfunction of the phosphatidylinositol-4,5-bisphosphate (PIP2)-dependent cation channel, transient receptor potential melastatin (TRPM) 3, as well as altered surface expression patterns of TRPM3 and TRPM2 in the pathophysiology of ME/CFS. TRPM7 is a related channel that is modulated by PIP2 and participates in Ca2+ signaling. Though TRPM7 is expressed on NK cells, the role of TRPM7 with IL-2 and intracellular signaling mechanisms in the NK cells of ME/CFS patients is unknown. This study examined the effect of IL-2 stimulation and TRPM7 pharmacomodulation on NK cell cytotoxicity using flow cytometric assays as well as co-localization of TRPM7 with PIP2 and cortical actin using confocal microscopy in 17 ME/CFS patients and 17 age- and sex-matched healthy controls. The outcomes of this investigation are preliminary and indicate that crosstalk between IL-2 and TRMP7 exists. A larger sample size to confirm these findings and characterization of TRPM7 in ME/CFS using other experimental modalities are warranted.
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16
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Du Preez S, Cabanas H, Staines D, Marshall-Gradisnik S. Potential Implications of Mammalian Transient Receptor Potential Melastatin 7 in the Pathophysiology of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:10708. [PMID: 34682454 PMCID: PMC8535478 DOI: 10.3390/ijerph182010708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 11/25/2022]
Abstract
The transient receptor potential (TRP) superfamily of ion channels is involved in the molecular mechanisms that mediate neuroimmune interactions and activities. Recent advancements in neuroimmunology have identified a role for TRP cation channels in several neuroimmune disorders including amyotropic lateral sclerosis, multiple sclerosis, and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). ME/CFS is a debilitating disorder with an obscure aetiology, hence considerable examination of its pathobiology is warranted. Dysregulation of TRP melastatin (TRPM) subfamily members and calcium signalling processes are implicated in the neurological, immunological, cardiovascular, and metabolic impairments inherent in ME/CFS. In this review, we present TRPM7 as a potential candidate in the pathomechanism of ME/CFS, as TRPM7 is increasingly recognized as a key mediator of physiological and pathophysiological mechanisms affecting neurological, immunological, cardiovascular, and metabolic processes. A focused examination of the biochemistry of TRPM7, the role of this protein in the aforementioned systems, and the potential of TRPM7 as a molecular mechanism in the pathophysiology of ME/CFS will be discussed in this review. TRPM7 is a compelling candidate to examine in the pathobiology of ME/CFS as TRPM7 fulfils several key roles in multiple organ systems, and there is a paucity of literature reporting on its role in ME/CFS.
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Affiliation(s)
- Stanley Du Preez
- National Centre for Neuroimmunology and Emerging Diseases, Menzies Health Institute, Griffith University, Gold Coast 4215, Australia; (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Menzies Health Institute Queensland, Griffith University, Gold Coast 4215, Australia;
- School of Pharmacy and Medical Sciences, Griffith University, Gold Coast 4215, Australia
- School of Medicine and Dentistry, Griffith University, Gold Coast 4215, Australia
| | - Helene Cabanas
- Consortium Health International for Myalgic Encephalomyelitis, Menzies Health Institute Queensland, Griffith University, Gold Coast 4215, Australia;
- Institut de Recherche Saint Louis, Université de Paris, INSERM U944 and CNRS UMR 7212, Hôpital Saint Louis, APHP, 75010 Paris, France
| | - Donald Staines
- National Centre for Neuroimmunology and Emerging Diseases, Menzies Health Institute, Griffith University, Gold Coast 4215, Australia; (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Menzies Health Institute Queensland, Griffith University, Gold Coast 4215, Australia;
| | - Sonya Marshall-Gradisnik
- National Centre for Neuroimmunology and Emerging Diseases, Menzies Health Institute, Griffith University, Gold Coast 4215, Australia; (D.S.); (S.M.-G.)
- Consortium Health International for Myalgic Encephalomyelitis, Menzies Health Institute Queensland, Griffith University, Gold Coast 4215, Australia;
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17
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Liang HY, Chen Y, Wei X, Ma GG, Ding J, Lu C, Zhou RP, Hu W. Immunomodulatory functions of TRPM7 and its implications in autoimmune diseases. Immunology 2021; 165:3-21. [PMID: 34558663 DOI: 10.1111/imm.13420] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 08/17/2021] [Accepted: 09/14/2021] [Indexed: 12/18/2022] Open
Abstract
An autoimmune disease is an inappropriate response to one's tissues due to a break in immune tolerance and exposure to self-antigens. It often leads to structural and functional damage to organs and systemic disorders. To date, there are no effective interventions to prevent the progression of autoimmune diseases. Hence, there is an urgent need for new treatment targets. TRPM7 is an enzyme-coupled, transient receptor ion channel of the subfamily M that plays a vital role in pathologic and physiologic conditions. While TRPM7 is constitutively activated under certain conditions, it can regulate cell migration, polarization, proliferation and cytokine secretion. However, a growing body of evidence highlights the critical role of TRPM7 in autoimmune diseases, including rheumatoid arthritis, multiple sclerosis and diabetes. Herein, we present (a) a review of the channel kinase properties of TRPM7 and its pharmacological properties, (b) discuss the role of TRPM7 in immune cells (neutrophils, macrophages, lymphocytes and mast cells) and its upstream immunoreactive substances, and (c) highlight TRPM7 as a potential therapeutic target for autoimmune diseases.
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Affiliation(s)
- Hong-Yu Liang
- The Second School of Clinical Medicine, Anhui Medical University, Hefei, China
| | - Yong Chen
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Xin Wei
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Gang-Gang Ma
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Jie Ding
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Chao Lu
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Ren-Peng Zhou
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Wei Hu
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
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18
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Meng S, Alanazi R, Ji D, Bandura J, Luo ZW, Fleig A, Feng ZP, Sun HS. Role of TRPM7 kinase in cancer. Cell Calcium 2021; 96:102400. [PMID: 33784560 DOI: 10.1016/j.ceca.2021.102400] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 01/09/2023]
Abstract
Cancer is the second leading cause of death worldwide and accounted for an estimated 9.6 million deaths, or 1 in 6 deaths, in 2018. Despite recent advances in cancer prevention, diagnosis, and treatment strategies, the burden of this disease continues to grow with each year, with dire physical, emotional, and economic consequences for all levels of society. Classic characteristics of cancer include rapid, uncontrolled cell proliferation and spread of cancerous cells to other parts of the body, a process known as metastasis. Transient receptor potential melastatin 7 (TRPM7), a Ca2+- and Mg2+-permeable nonselective divalent cation channel defined by the atypical presence of an α-kinase within its C-terminal domain, has been implicated, due to its modulation of Ca2+ and Mg2+ influx, in a wide variety of physiological and pathological processes, including cancer. TRPM7 is overexpressed in several cancer types and has been shown to variably increase cellular proliferation, migration, and invasion of tumour cells. However, the relative contribution of TRPM7 kinase domain activity to cancer as opposed to ion flux through its channel pore remains an area of active discovery. In this review, we describe the specific role of the TRPM7 kinase domain in cancer processes as well as mechanisms of regulation and inhibition of the kinase domain.
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Affiliation(s)
- Selena Meng
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Rahmah Alanazi
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Delphine Ji
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Julia Bandura
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Zheng-Wei Luo
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center and John A. Burns School of Medicine and Cancer Center at the University of Hawaii, Honolulu, HI, 96720, USA
| | - Zhong-Ping Feng
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada.
| | - Hong-Shuo Sun
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Pharmacology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Leslie Dan Faculty of Pharmacy, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada.
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19
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Beesetty P, Rockwood J, Kaitsuka T, Zhelay T, Hourani S, Matsushita M, Kozak JA. Phagocytic activity of splenic macrophages is enhanced and accompanied by cytosolic alkalinization in TRPM7 kinase-dead mice. FEBS J 2021; 288:3585-3601. [PMID: 33354894 DOI: 10.1111/febs.15683] [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: 06/01/2020] [Revised: 10/29/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022]
Abstract
Transient receptor potential melastatin 7 (TRPM7) is a unique protein functioning as a cation channel as well as a serine/threonine kinase and is highly expressed in immune cells such as lymphocytes and macrophages. TRPM7 kinase-dead (KD) mouse model has been used to investigate the role of this protein in immune cells; these animals display moderate splenomegaly and ectopic hemopoiesis. The basal TRPM7 current magnitudes in peritoneal macrophages isolated from KD mice were higher; however, the maximum currents, achieved after cytoplasmic Mg2+ washout, were not different. In the present study, we investigated the consequences of TRPM7 kinase inactivation in splenic and peritoneal macrophages. We measured the basal phagocytic activity of splenic macrophages using fluorescent latex beads, pHrodo zymosan bioparticles, and opsonized red blood cells. KD macrophages phagocytized more efficiently and had slightly higher baseline calcium levels compared to WT cells. We found no obvious differences in store-operated Ca2+ entry between WT and KD macrophages. By contrast, the resting cytosolic pH in KD macrophages was significantly more alkaline than in WT. Pharmacological blockade of sodium hydrogen exchanger 1 (NHE1) reversed the cytosolic alkalinization and reduced phagocytosis in KD macrophages. Basal TRPM7 channel activity in KD macrophages was also reduced after NHE1 blockade. Cytosolic Mg2+ sensitivity of TRPM7 channels measured in peritoneal macrophages was similar in WT and KD mice. The higher basal TRPM7 channel activity in KD macrophages is likely due to alkalinization. Our results identify a novel role for TRPM7 kinase as a suppressor of basal phagocytosis and a regulator of cellular pH.
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Affiliation(s)
- Pavani Beesetty
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Jananie Rockwood
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Japan
| | - Tetyana Zhelay
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Siham Hourani
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Masayuki Matsushita
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - J Ashot Kozak
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
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20
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Hu F, Li M, Han F, Zhang Q, Zeng Y, Zhang W, Cheng X. Role of TRPM7 in cardiac fibrosis: A potential therapeutic target (Review). Exp Ther Med 2020; 21:173. [PMID: 33456540 PMCID: PMC7792474 DOI: 10.3892/etm.2020.9604] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 12/04/2020] [Indexed: 02/06/2023] Open
Abstract
Cardiac fibrosis is a hallmark of cardiac remodeling associated with nearly all forms of heart disease. Clinically, no effective therapeutic drugs aim to inhibit cardiac fibrosis, owing to the complex etiological heterogeneity and pathogenesis of this disease. A two-in-one protein structure, a ubiquitous expression profile and unique biophysical characteristics enable the involvement of transient receptor potential melastatin-subfamily member 7 (TRPM7) in the pathogenesis and development of fibrosis-related cardiac diseases, such as heart failure (HF), cardiomyopathies, arrhythmia and hyperaldosteronism. In response to a variety of stimuli, multiple bioactive molecules can activate TRPM7 and related signaling pathways, leading to fibroblast proliferation, differentiation and extracellular matrix production in cardiac fibroblasts. TRPM7-mediated Ca2+ signaling and TGF-β1 signaling pathways are critical for the formation of fibrosis. Accumulating evidence has demonstrated that TRPM7 is a potential pharmacological target for halting the development of fibrotic cardiac diseases. Reliable drug-like molecules for further development of high-affinity in vivo drugs targeting TRPM7 are urgently needed. The present review discusses the widespread and significant role of TRPM7 in cardiac fibrosis and focuses on its potential as a therapeutic target for alleviating heart fibrogenesis.
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Affiliation(s)
- Feng Hu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Meiyong Li
- Department of Laboratory Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Fengyu Han
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qing Zhang
- Department of Cardiology, The Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Yuhao Zeng
- Department of Medical Education, The Second Clinical Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Weifang Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xiaoshu Cheng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China.,Center for Prevention and Treatment of Cardiovascular Diseases, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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21
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Wong R, Gong H, Alanazi R, Bondoc A, Luck A, Sabha N, Horgen FD, Fleig A, Rutka JT, Feng ZP, Sun HS. Inhibition of TRPM7 with waixenicin A reduces glioblastoma cellular functions. Cell Calcium 2020; 92:102307. [PMID: 33080445 DOI: 10.1016/j.ceca.2020.102307] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/27/2020] [Accepted: 10/04/2020] [Indexed: 12/28/2022]
Abstract
Glioblastoma (GBM) is the most common malignant primary brain tumour originating in the CNS. Median patient survival is <15 months with standard treatment which consists of surgery alongside radiation therapy and temozolomide chemotherapy. However, because of the aggressive nature of GBM, and the significant toxicity of these adjuvant therapies, long-term therapeutic effects are unsatisfactory. Thus, there is urgency to identify new drug targets for GBM. Recent evidence shows that the transient receptor potential melastatin 7 (TRPM7) cation channel is aberrantly upregulated in GBM and its inhibition leads to reduction of GBM cellular functions. This suggests that TRPM7 may be a potential drug target for GBM treatment. In this study, we assessed the effects of the specific TRPM7 antagonist waixenicin A on human GBM cell lines U87 or U251 both in vitro and in vivo. First, we demonstrated in vitro that application of waixenicin A reduced TRPM7 protein expression and inhibited the TRPM7-like currents in GBM cells. We also observed reduction of GBM cell viability, migration, and invasion. Using an intracranial xenograft GBM mouse model, we showed that with treatment of waixenicin A, there was increased cleaved caspase 3 activity, alongside reduction in Ki-67, cofilin, and Akt activity in vivo. Together, these data demonstrate higher GBM cell apoptosis, and lower proliferation, migration, invasion and survivability following treatment with waixenicin A.
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Affiliation(s)
- Raymond Wong
- Departments of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Haifan Gong
- Departments of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Rahmah Alanazi
- Departments of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Andrew Bondoc
- Departments of Cell Biology SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Amanda Luck
- Departments of Cell Biology SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Nesrin Sabha
- Departments of Genetics and Genome Biology, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - F David Horgen
- Department of Natural Sciences, Hawaii Pacific University, Kaneohe, Hawaii, 96744, USA
| | - Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center and John A. Burns School of Medicine at the University of Hawaii, Honolulu, Hawaii, 96720, USA
| | - James T Rutka
- Departments of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada.
| | - Zhong-Ping Feng
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada.
| | - Hong-Shuo Sun
- Departments of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada; Department of Pharmacology, Faculty of Medicine, University of Toronto, Toronto, Canada; Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Canada.
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22
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Mapping TRPM7 Function by NS8593. Int J Mol Sci 2020; 21:ijms21197017. [PMID: 32977698 PMCID: PMC7582524 DOI: 10.3390/ijms21197017] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/16/2020] [Accepted: 09/21/2020] [Indexed: 02/06/2023] Open
Abstract
The transient receptor potential cation channel, subfamily M, member 7 (TRPM7) is a ubiquitously expressed membrane protein, which forms a channel linked to a cytosolic protein kinase. Genetic inactivation of TRPM7 in animal models uncovered the critical role of TRPM7 in early embryonic development, immune responses, and the organismal balance of Zn2+, Mg2+, and Ca2+. TRPM7 emerged as a new therapeutic target because malfunctions of TRPM7 have been associated with anoxic neuronal death, tissue fibrosis, tumour progression, and giant platelet disorder. Recently, several laboratories have identified pharmacological compounds allowing to modulate either channel or kinase activity of TRPM7. Among other small molecules, NS8593 has been defined as a potent negative gating regulator of the TRPM7 channel. Consequently, several groups applied NS8593 to investigate cellular pathways regulated by TRPM7. Here, we summarize the progress in this research area. In particular, two notable milestones have been reached in the assessment of TRPM7 druggability. Firstly, several laboratories demonstrated that NS8593 treatment reliably mirrors prominent phenotypes of cells manipulated by genetic inactivation of TRPM7. Secondly, it has been shown that NS8593 allows us to probe the therapeutic potential of TRPM7 in animal models of human diseases. Collectively, these studies employing NS8593 may serve as a blueprint for the preclinical assessment of TRPM7-targeting drugs.
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23
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Xing J, Wang M, Hong J, Gao Y, Liu Y, Gu H, Dong J, Li L. TRPM7 channel inhibition exacerbates pulmonary arterial hypertension through MEK/ERK pathway. Aging (Albany NY) 2020; 11:4050-4065. [PMID: 31219801 PMCID: PMC6629001 DOI: 10.18632/aging.102036] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/13/2019] [Indexed: 12/14/2022]
Abstract
Cellular senescence is an important mechanism of autonomous tumor suppression, while its consequence such as the senescence-associated secretory phenotype (SASP) may drive tumorigenesis and age-related diseases. Therefore, controlling the cell fate optimally when encountering senescence stress is helpful for anti-cancer or anti-aging treatments. To identify genes essential for senescence establishment or maintenance, we carried out a CRISPR-based screen with a deliberately designed single-guide RNA (sgRNA) library. The library comprised of about 12,000 kinds of sgRNAs targeting 1378 senescence-associated genes selected by integrating the information of literature mining, protein-protein interaction network, and differential gene expression. We successfully detected a dozen gene deficiencies potentially causing senescence bypass, and their phenotypes were further validated with a high true positive rate. RNA-seq analysis showed distinct transcriptome patterns of these bypass cells. Interestingly, in the bypass cells, the expression of SASP genes was maintained or elevated with CHEK2, HAS1, or MDK deficiency; but neutralized with MTOR, CRISPLD2, or MORF4L1 deficiency. Pathways of some age-related neurodegenerative disorders were also downregulated with MTOR, CRISPLD2, or MORF4L1 deficiency. The results demonstrated that disturbing these genes could lead to distinct cell fates as a consequence of senescence bypass, suggesting that they may play essential roles in cellular senescence.
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Affiliation(s)
- Junhui Xing
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Mengyu Wang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jin Hong
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yueqiao Gao
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yuzhou Liu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Heping Gu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianzeng Dong
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ling Li
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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24
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Hong F, Wu S, Zhang C, Li L, Chen J, Fu Y, Wang J. TRPM7 Upregulate the Activity of SMAD1 through PLC Signaling Way to Promote Osteogenesis of hBMSCs. BIOMED RESEARCH INTERNATIONAL 2020; 2020:9458983. [PMID: 32596398 PMCID: PMC7294393 DOI: 10.1155/2020/9458983] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/18/2020] [Accepted: 04/17/2020] [Indexed: 12/14/2022]
Abstract
TRPM7 is a member of the transient receptor potential cation channel (TRP channel) subfamily M and possesses both an ion channel domain and a functional serine/threonine α-kinase domain. It has been proven to play an essential role in the osteogenic differentiation of human bone marrow-derived mesenchymal stem cells (hBMSCs). However, the signaling pathway and molecular mechanism for TRPM7 in regulating osteogenic differentiation remain largely unknown. In this study, the potential role and mechanism of TRPM7 in the osteogenic differentiation of hBMSCs were investigated. The results showed that the expression of TRPM7 mRNA and protein increased, as did the osteogenic induction time. Upregulation or inhibition of TRPM7 could promote or inhibit the osteogenic differentiation of hBMSCs for 14 days. It was also found that the upregulation or inhibition of TRPM7 promoted or inhibited the activity of PLC and SMAD1, respectively, during osteogenic differentiation. PLC could promote osteogenic differentiation by upregulating the activity of SMAD1. However, inhibition of PLC alone could reduce the activity of SMAD1 but not inhibit completely the activation of SMAD1. Therefore, we inferred that it is an important signaling pathway for TRPM7 to upregulate the activity of SMAD1 through PLC and thereby promote the osteogenic differentiation of hBMSCs, but it is not a singular pathway. TRPM7 may also regulate the activation of SMAD1 through other ways, except for PLC, during osteogenic differentiation of hBMSCs.
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Affiliation(s)
- Fanfan Hong
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shali Wu
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Cui Zhang
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Liang Li
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jianling Chen
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yong Fu
- Department of ENT, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang, China
| | - Jinfu Wang
- Institute of Cell and Development Biology, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Department of ENT, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang, China
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25
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Mahtani T, Treanor B. Beyond the CRAC: Diversification of ion signaling in B cells. Immunol Rev 2020; 291:104-122. [PMID: 31402507 PMCID: PMC6851625 DOI: 10.1111/imr.12770] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 04/30/2019] [Indexed: 12/22/2022]
Abstract
Although calcium signaling and the important role of calcium release–activated calcium channels is well recognized in the context of immune cell signaling, there is a vast diversity of ion channels and transporters that regulate the entry of ions beyond calcium, including magnesium, zinc, potassium, sodium, and chloride. These ions play a critical role in numerous metabolic and cellular processes. The importance of ions in human health and disease is illustrated by the identification of primary immunodeficiencies in patients with mutations in genes encoding ion channels and transporters, as well as the immunological defects observed in individuals with nutritional ion deficiencies. Despite progress in identifying the important role of ions in immune cell development and activation, we are still in the early stages of exploring the diversity of ion channels and transporters and mechanistically understanding the role of these ions in immune cell biology. Here, we review the biology of ion signaling in B cells and the identification of critical ion channels and transporters in B‐cell development, activation, and differentiation into effector cells. Elucidating the role of ion channels and transporters in immune cell signaling is critical for expanding the repertoire of potential therapeutics for the treatment of immune disorders. Moreover, increased understanding of the role of ions in immune cell function will enhance our understanding of the potentially serious consequences of ion deficiencies in human health and disease.
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Affiliation(s)
- Trisha Mahtani
- Department of Cell & Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Bebhinn Treanor
- Department of Cell & Systems Biology, University of Toronto, Toronto, Ontario, Canada.,Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario, Canada
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26
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Inhibition of TRPM7 blocks MRTF/SRF-dependent transcriptional and tumorigenic activity. Oncogene 2019; 39:2328-2344. [PMID: 31844251 DOI: 10.1038/s41388-019-1140-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 11/24/2019] [Accepted: 11/29/2019] [Indexed: 12/13/2022]
Abstract
Myocardin-related transcription factors A and B (MRTFs) are coactivators of Serum Response Factor (SRF) that mediates the expression of genes involved in cell proliferation, migration and differentiation. There is mounting evidence that MRTFs and SRF represent promising targets for hepatocellular carcinoma (HCC) growth. Since MRTF-A nuclear localization is a prerequisite for its transcriptional activity and oncogenic properties, we searched for pharmacologically active compounds able to redistribute MRTF-A to the cytoplasm. We identified NS8593, a negative gating modulator of the transient receptor potential cation channel TRPM7, as a novel inhibitor of MRTF-A nuclear localization and transcriptional activity. Using a pharmacological approach and targeted genome editing, we investigated the functional contribution of TRPM7, a unique ion channel containing a serine-threonine kinase domain, to MRTF transcriptional and tumorigenic activity. We found that TRPM7 function regulates RhoA activity and subsequently actin polymerization, MRTF-A-Filamin A complex formation and MRTF-A/SRF target gene expression. Mechanistically, TRPM7 signaling relies on TRPM7 channel-mediated Mg2+ influx and phosphorylation of RhoA by TRPM7 kinase. Pharmacological blockade of TRPM7 results in oncogene-induced senescence of hepatocellular carcinoma (HCC) cells in vitro and in vivo in HCC xenografts. Hence, inhibition of the TRPM7/MRTF axis emerges as a promising strategy to curb HCC growth.
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27
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A Monoallelic Two-Hit Mechanism in PLCD1 Explains the Genetic Pathogenesis of Hereditary Trichilemmal Cyst Formation. J Invest Dermatol 2019; 139:2154-2163.e5. [PMID: 31082376 DOI: 10.1016/j.jid.2019.04.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/25/2019] [Accepted: 04/04/2019] [Indexed: 01/25/2023]
Abstract
Trichilemmal cysts are common hair follicle-derived intradermal cysts. The trait shows an autosomal dominant mode of transmission with incomplete penetrance. Here, we describe the pathogenetic mechanism for the development of hereditary trichilemmal cysts. By whole-exome sequencing of DNA from the blood samples of 5 affected individuals and subsequent Sanger sequencing of a family cohort including 35 affected individuals, this study identified a combination of the Phospholipase C Delta 1 germline variants c.903A>G, p.(Pro301Pro) and c.1379C>T, p.(Ser460Leu) as a high-risk factor for trichilemmal cyst development. Allele-specific PCRs and cloning experiments showed that these two variants are present on the same allele. The analysis of tissue from several cysts revealed that an additional somatic Phospholipase C Delta 1 mutation on the same allele is required for cyst formation. In two different functional in vitro assays, this study showed that the protein function of the cyst-specific 1-phosphatidylinositol 4, 5-bisphosphate phosphodiesterase delta-1 protein variant is modified. This pathologic mechanism defines a monoallelic model of the two-hit mechanism proposed for tumor development and other hereditary cyst diseases.
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28
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Zou ZG, Rios FJ, Montezano AC, Touyz RM. TRPM7, Magnesium, and Signaling. Int J Mol Sci 2019; 20:E1877. [PMID: 30995736 PMCID: PMC6515203 DOI: 10.3390/ijms20081877] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/12/2019] [Accepted: 04/12/2019] [Indexed: 12/17/2022] Open
Abstract
The transient receptor potential melastatin-subfamily member 7 (TRPM7) is a ubiquitously expressed chanzyme that possesses an ion channel permeable to the divalent cations Mg2+, Ca2+, and Zn2+, and an α-kinase that phosphorylates downstream substrates. TRPM7 and its homologue TRPM6 have been implicated in a variety of cellular functions and is critically associated with intracellular signaling, including receptor tyrosine kinase (RTK)-mediated pathways. Emerging evidence indicates that growth factors, such as EGF and VEGF, signal through their RTKs, which regulate activity of TRPM6 and TRPM7. TRPM6 is primarily an epithelial-associated channel, while TRPM7 is more ubiquitous. In this review we focus on TRPM7 and its association with growth factors, RTKs, and downstream kinase signaling. We also highlight how interplay between TRPM7, Mg2+ and signaling kinases influences cell function in physiological and pathological conditions, such as cancer and preeclampsia.
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Affiliation(s)
- Zhi-Guo Zou
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, Glasgow G12 8TA, UK.
| | - Francisco J Rios
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, Glasgow G12 8TA, UK.
| | - Augusto C Montezano
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, Glasgow G12 8TA, UK.
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Centre, University of Glasgow, Glasgow G12 8TA, UK.
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29
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Nadolni W, Zierler S. The Channel-Kinase TRPM7 as Novel Regulator of Immune System Homeostasis. Cells 2018; 7:cells7080109. [PMID: 30126133 PMCID: PMC6115979 DOI: 10.3390/cells7080109] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/13/2018] [Accepted: 08/13/2018] [Indexed: 12/16/2022] Open
Abstract
The enzyme-coupled transient receptor potential channel subfamily M member 7, TRPM7, has been associated with immunity and immune cell signalling. Here, we review the role of this remarkable signalling protein in lymphocyte proliferation, differentiation, activation and survival. We also discuss its role in mast cell, neutrophil and macrophage function and highlight the potential of TRPM7 to regulate immune system homeostasis. Further, we shed light on how the cellular signalling cascades involving TRPM7 channel and/or kinase activity culminate in pathologies as diverse as allergic hypersensitivity, arterial thrombosis and graft versus host disease (GVHD), stressing the need for TRPM7 specific pharmacological modulators.
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Affiliation(s)
- Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Goethestr. 33, 80336 Munich, Germany.
| | - Susanna Zierler
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Goethestr. 33, 80336 Munich, Germany.
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30
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Suzuki S, Lis A, Schmitz C, Penner R, Fleig A. The TRPM7 kinase limits receptor-induced calcium release by regulating heterotrimeric G-proteins. Cell Mol Life Sci 2018; 75:3069-3078. [PMID: 29500477 PMCID: PMC6033657 DOI: 10.1007/s00018-018-2786-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 02/06/2018] [Accepted: 02/26/2018] [Indexed: 12/17/2022]
Abstract
The melastatin-related transient receptor potential member 7 (TRPM7) is a unique fusion protein with both ion channel function and enzymatic α-kinase activity. TRPM7 is essential for cellular systemic magnesium homeostasis and early embryogenesis; it promotes calcium transport during global brain ischemia and emerges as a key player in cancer growth. TRPM7 channels are negatively regulated through G-protein-coupled receptor-stimulation, either by reducing cellular cyclic adenosine monophosphate (cAMP) or depleting phosphatidylinositol bisphosphate (PIP2) levels in the plasma membrane. We here identify that heterologous overexpression of human TRPM7-K1648R mutant will lead to disruption of protease or purinergic receptor-induced calcium release. The disruption occurs at the level of Gq, which requires intact TRPM7 kinase phosphorylation activity for orderly downstream signal transduction to activate phospholipase (PLC)β and cause calcium release. We propose that this mechanism may support limiting GPCR-mediated calcium signaling in times of insufficient cellular ATP supply.
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Affiliation(s)
- Sayuri Suzuki
- Center for Biomedical Research, The Queen's Medical Center, 1301 Punchbowl St., Honolulu, HI, 96813, USA
- John A. Burns School of Medicine, University of Hawaii Cancer Center, University of Hawaii, 651 Ilalo St, Honolulu, HI, 96813, USA
| | - Annette Lis
- Center for Biomedical Research, The Queen's Medical Center, 1301 Punchbowl St., Honolulu, HI, 96813, USA
- Biophysics, Center for Integrative Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, 66421, Homburg/Saar, Germany
| | - Carsten Schmitz
- Integrated Department of Immunology, National Jewish Health, University of Colorado Denver, Denver, CO, 80206, USA
| | - Reinhold Penner
- Center for Biomedical Research, The Queen's Medical Center, 1301 Punchbowl St., Honolulu, HI, 96813, USA
- John A. Burns School of Medicine, University of Hawaii Cancer Center, University of Hawaii, 651 Ilalo St, Honolulu, HI, 96813, USA
| | - Andrea Fleig
- Center for Biomedical Research, The Queen's Medical Center, 1301 Punchbowl St., Honolulu, HI, 96813, USA.
- John A. Burns School of Medicine, University of Hawaii Cancer Center, University of Hawaii, 651 Ilalo St, Honolulu, HI, 96813, USA.
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31
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Ramirez GA, Coletto LA, Sciorati C, Bozzolo EP, Manunta P, Rovere-Querini P, Manfredi AA. Ion Channels and Transporters in Inflammation: Special Focus on TRP Channels and TRPC6. Cells 2018; 7:E70. [PMID: 29973568 PMCID: PMC6070975 DOI: 10.3390/cells7070070] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 06/27/2018] [Accepted: 06/29/2018] [Indexed: 12/14/2022] Open
Abstract
Allergy and autoimmune diseases are characterised by a multifactorial pathogenic background. Several genes involved in the control of innate and adaptive immunity have been associated with diseases and variably combine with each other as well as with environmental factors and epigenetic processes to shape the characteristics of individual manifestations. Systemic or local perturbations in salt/water balance and in ion exchanges between the intra- and extracellular spaces or among tissues play a role. In this field, usually referred to as elementary immunology, novel evidence has been recently acquired on the role of members of the transient potential receptor (TRP) channel family in several cellular mechanisms of potential significance for the pathophysiology of the immune response. TRP canonical channel 6 (TRPC6) is emerging as a functional element for the control of calcium currents in immune-committed cells and target tissues. In fact, TRPC6 influences leukocytes’ tasks such as transendothelial migration, chemotaxis, phagocytosis and cytokine release. TRPC6 also modulates the sensitivity of immune cells to apoptosis and influences tissue susceptibility to ischemia-reperfusion injury and excitotoxicity. Here, we provide a view of the interactions between ion exchanges and inflammation with a focus on the pathogenesis of immune-mediated diseases and potential future therapeutic implications.
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Affiliation(s)
- Giuseppe A Ramirez
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
- Division of Immunology, Transplantation and Infectious Immunity, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Lavinia A Coletto
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
- Division of Immunology, Transplantation and Infectious Immunity, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Clara Sciorati
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Division of Immunology, Transplantation and Infectious Immunity, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Enrica P Bozzolo
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Paolo Manunta
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Nephrology, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Patrizia Rovere-Querini
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
- Division of Immunology, Transplantation and Infectious Immunity, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Angelo A Manfredi
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
- Unit of Immunology, Rheumatology, Allergy and Rare Diseases, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
- Division of Immunology, Transplantation and Infectious Immunity, IRCCS Ospedale San Raffaele, 20132 Milan, Italy.
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32
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Severely low serum magnesium is associated with increased risks of positive anti-thyroglobulin antibody and hypothyroidism: A cross-sectional study. Sci Rep 2018; 8:9904. [PMID: 29967483 PMCID: PMC6028657 DOI: 10.1038/s41598-018-28362-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/21/2018] [Indexed: 12/12/2022] Open
Abstract
Trace elements, such as iodine and selenium, are closely related to autoimmune thyroiditis and thyroid function. Low serum magnesium is associated with several chronic diseases; however, its associations with autoimmune thyroiditis and thyroid function are unclear. We investigated the relationships between low serum magnesium, autoimmune thyroiditis, and thyroid function in 1,257 Chinese participants. Demographic data were collected via questionnaires, and levels of serum thyroid stimulating hormone, anti-thyroid peroxidase antibody, anti-thyroglobulin antibody (TGAb), free thyroxine, serum magnesium, serum iodine, and urinary iodine concentration were measured. Participants were divided into serum magnesium level quartiles (≤0.55, 0.551-0.85, 0.851-1.15, and >1.15 mmol/L). The median serum magnesium level was 0.89 (0.73-1.06) mmol/L; levels ≤0.55 mmol/L were considered severely low (5.9% of participants). The risks of TGAb positivity and Hashimoto thyroiditis (HT) diagnosed using ultrasonography in the lowest quartile group were higher than those in the adequate magnesium group (0.851-1.15 mmol/L) (p < 0.01, odds ratios [ORs] = 2.748-3.236). The risks of total and subclinical-only hypothyroidism in the lowest quartile group were higher than those in the adequate magnesium group (0.851-1.15 mmol/L) (p < 0.01, ORs = 4.482-4.971). Severely low serum magnesium levels are associated with an increased rate of TGAb positivity, HT, and hypothyroidism.
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Krishnamoorthy M, Wasim L, Buhari FHM, Zhao T, Mahtani T, Ho J, Kang S, Deason-Towne F, Perraud AL, Schmitz C, Treanor B. The channel-kinase TRPM7 regulates antigen gathering and internalization in B cells. Sci Signal 2018; 11:11/533/eaah6692. [PMID: 29871912 DOI: 10.1126/scisignal.aah6692] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Members of the transient receptor potential (TRP) family of ion channels are cellular sensors involved in numerous physiological and pathological processes. We identified the TRP subfamily M member 7 (TRPM7) channel-kinase as a previously uncharacterized regulator of B cell activation. We showed that TRPM7 played a critical role in the early events of B cell activation through both its ion channel and kinase functions. DT40 B cells deficient in TRPM7 or expressing a kinase-deficient mutant of TRPM7 showed defective gathering of antigen and prolonged B cell receptor (BCR) signaling. We showed that lipid metabolism was altered in TRPM7-deficient cells and in cells expressing a kinase-deficient mutant of TRPM7 and suggest that PLC-γ2 may be a target of the kinase activity of TRPM7. Primary B cells that expressed less TRPM7 or were treated with a pharmacological inhibitor of TRPM7 also displayed defective antigen gathering and increased BCR signaling. Finally, we demonstrated that blocking TRPM7 function compromised antigen internalization and presentation to T cells. These data suggest that TRPM7 controls an essential process required for B cell affinity maturation and the production of high-affinity antibodies.
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Affiliation(s)
- Mithunah Krishnamoorthy
- Department of Cell and Systems Biology, University of Toronto, 24 Harbord Street, Toronto, Ontario M5S 3G5, Canada
| | - Laabiah Wasim
- Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada
| | - Fathima Hifza Mohamed Buhari
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Tiantian Zhao
- Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada
| | - Trisha Mahtani
- Department of Cell and Systems Biology, University of Toronto, 24 Harbord Street, Toronto, Ontario M5S 3G5, Canada
| | - Josephine Ho
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Sohee Kang
- Department of Computer and Mathematical Sciences, University of Toronto Scarborough, Toronto, Ontario M1C 1A4, Canada
| | - Francina Deason-Towne
- Department of Immunology and Microbiology, University of Colorado, Denver, CO 80206, USA
| | - Anne-Laure Perraud
- Department of Immunology and Microbiology, University of Colorado, Denver, CO 80206, USA
| | - Carsten Schmitz
- Department of Immunology and Microbiology, University of Colorado, Denver, CO 80206, USA.,Department of Biomedical Research, National Jewish Health, Denver, CO 80206, USA
| | - Bebhinn Treanor
- Department of Cell and Systems Biology, University of Toronto, 24 Harbord Street, Toronto, Ontario M5S 3G5, Canada. .,Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada.,Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
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Cai N, Lou L, Al-Saadi N, Tetteh S, Runnels LW. The kinase activity of the channel-kinase protein TRPM7 regulates stability and localization of the TRPM7 channel in polarized epithelial cells. J Biol Chem 2018; 293:11491-11504. [PMID: 29866880 DOI: 10.1074/jbc.ra118.001925] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 05/25/2018] [Indexed: 12/13/2022] Open
Abstract
The channel-kinase transient receptor potential melastatin 7 (TRPM7) is a bifunctional protein with ion channel and kinase domains. The kinase activity of TRPM7 has been linked to the regulation of a broad range of cellular activities, but little is understood as to how the channel itself is regulated by its own kinase activity. Here, using several mammalian cell lines expressing WT TRPM7 or kinase-inactive variants, we discovered that compared with the cells expressing WT TRPM7, cells in which TRPM7's kinase activity was inactivated had faster degradation, elevated ubiquitination, and increased intracellular retention of the channel. Mutational analysis of TRPM7 autophosphorylation sites further revealed a role for Ser-1360 of TRPM7 as a key residue mediating both TRPM7 stability and intracellular trafficking. Additional trafficking roles were uncovered for Ser-1403 and Ser-1567, whose phosphorylation by TRPM7's kinase activity mediated the interaction of the channel with the signaling protein 14-3-3θ. In summary, our results point to a critical role for TRPM7's kinase activity in regulating proteasome-mediated turnover of the TRPM7 channel and controlling its cellular localization in polarized epithelial cells. Overall, these findings improve our understanding of the significance of TRPM7's kinase activity for functional regulation of its channel activity.
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Affiliation(s)
- Na Cai
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey 08854
| | - Liping Lou
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey 08854
| | - Namariq Al-Saadi
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey 08854; University of Misan, Amarah 62001, Iraq
| | - Sandra Tetteh
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey 08854
| | - Loren W Runnels
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey 08854.
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36
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Inactivation of TRPM7 kinase in mice results in enlarged spleens, reduced T-cell proliferation and diminished store-operated calcium entry. Sci Rep 2018; 8:3023. [PMID: 29445164 PMCID: PMC5813043 DOI: 10.1038/s41598-018-21004-w] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 01/29/2018] [Indexed: 12/20/2022] Open
Abstract
T lymphocytes enlarge (blast) and proliferate in response to antigens in a multistep program that involves obligatory cytosolic calcium elevations. Store-operated calcium entry (SOCE) pathway is the primary source of Ca2+ in these cells. Here, we describe a novel modulator of blastogenesis, proliferation and SOCE: the TRPM7 channel kinase. TRPM7 kinase-dead (KD) K1646R knock-in mice exhibited splenomegaly and impaired blastogenic responses elicited by PMA/ionomycin or anti-CD3/CD28 antibodies. Splenic T-cell proliferation in vitro was weaker in the mutant compared to wildtype littermates. TRPM7 current magnitudes in WT and KD mouse T cells were, however, similar. We tested the dependence of T-cell proliferation on external Ca2+ and Mg2+ concentrations. At a fixed [Mg2+o] of ~0.4 mM, Ca2+o stimulated proliferation with a steep concentration dependence and vice versa, at a fixed [Ca2+o] of ~0.4 mM, Mg2+o positively regulated proliferation but with a shallower dependence. Proliferation was significantly lower in KD mouse than in wildtype at all Ca2+ and Mg2+ concentrations. Ca2+ elevations elicited by anti-CD3 antibody were diminished in KD mutant T cells and SOCE measured in activated KD splenocytes was reduced. These results demonstrate that a functional TRPM7 kinase supports robust SOCE, blastogenesis and proliferation, whereas its inactivation suppresses these cellular events.
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37
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Gotru SK, Chen W, Kraft P, Becker IC, Wolf K, Stritt S, Zierler S, Hermanns HM, Rao D, Perraud AL, Schmitz C, Zahedi RP, Noy PJ, Tomlinson MG, Dandekar T, Matsushita M, Chubanov V, Gudermann T, Stoll G, Nieswandt B, Braun A. TRPM7 Kinase Controls Calcium Responses in Arterial Thrombosis and Stroke in Mice. Arterioscler Thromb Vasc Biol 2018; 38:344-352. [DOI: 10.1161/atvbaha.117.310391] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/30/2017] [Indexed: 11/16/2022]
Affiliation(s)
- Sanjeev K. Gotru
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Wenchun Chen
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Peter Kraft
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Isabelle C. Becker
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Karen Wolf
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Simon Stritt
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Susanna Zierler
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Heike M. Hermanns
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Deviyani Rao
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Anne-Laure Perraud
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Carsten Schmitz
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - René P. Zahedi
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Peter J. Noy
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Michael G. Tomlinson
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Thomas Dandekar
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Masayuki Matsushita
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Vladimir Chubanov
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Thomas Gudermann
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Guido Stoll
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Bernhard Nieswandt
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
| | - Attila Braun
- From the Institute of Experimental Biomedicine, University Hospital of Würzburg (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), Rudolf Virchow Center (S.K.G., W.C., I.C.B., K.W., S.S., B.N., A.B.), and Institute of Clinical Epidemiology and Biometry, Comprehensive Heart Failure Center (P.K.), University of Würzburg, Germany; Department of Hepatology (H.M.H.) and Department of Neurology (P.K., G.S.), University Hospital of Würzburg, Germany; Walther-Straub-Institute for Pharmacology and Toxicology,
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Romagnani A, Vettore V, Rezzonico-Jost T, Hampe S, Rottoli E, Nadolni W, Perotti M, Meier MA, Hermanns C, Geiger S, Wennemuth G, Recordati C, Matsushita M, Muehlich S, Proietti M, Chubanov V, Gudermann T, Grassi F, Zierler S. TRPM7 kinase activity is essential for T cell colonization and alloreactivity in the gut. Nat Commun 2017; 8:1917. [PMID: 29203869 PMCID: PMC5714948 DOI: 10.1038/s41467-017-01960-z] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 10/29/2017] [Indexed: 02/08/2023] Open
Abstract
The melastatin-like transient-receptor-potential-7 protein (TRPM7), harbouring a cation channel and a serine/threonine kinase, has been implicated in thymopoiesis and cytokine expression. Here we show, by analysing TRPM7 kinase-dead mutant (Trpm7 R/R ) mice, that the enzymatic activity of the receptor is not essential for thymopoiesis, but is required for CD103 transcription and gut-homing of intra-epithelial lymphocytes. Defective T cell gut colonization reduces MHCII expression in intestinal epithelial cells. Mechanistically, TRPM7 kinase activity controls TGF-β-induced CD103 expression and pro-inflammatory T helper 17, but not regulatory T, cell differentiation by modulating SMAD2. Notably, we find that the TRPM7 kinase activity promotes gut colonization by alloreactive T cells in acute graft-versus-host disease. Thus, our results unravel a function of TRPM7 kinase in T cell activity and suggest a therapeutic potential of kinase inhibitors in averting acute graft-versus-host disease.
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Affiliation(s)
- Andrea Romagnani
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, c/o Theodor Kocher Institute, Freiestrasse 1, P.O. Box 938, CH-3000, Bern 9, Switzerland
| | - Valentina Vettore
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Tanja Rezzonico-Jost
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland
| | - Sarah Hampe
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Elsa Rottoli
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), Università degli Studi di Milano, Via G.B. Viotti 3/5, 20133, Milan, Italy
| | - Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Michela Perotti
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland
| | - Melanie A Meier
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Constanze Hermanns
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Sheila Geiger
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Gunther Wennemuth
- Institute for Anatomy, Universitätsklinikum Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | | | - Masayuki Matsushita
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Okinawa, 903-0215, Japan
| | - Susanne Muehlich
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Michele Proietti
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland.,Center for Chronic Immunodeficiency, Universitätsklinikum Freiburg, Breisacher Street 115, 79106, Freiburg, Germany
| | - Vladimir Chubanov
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Fabio Grassi
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland. .,Department of Medical Biotechnology and Translational Medicine (BIOMETRA), Università degli Studi di Milano, Via G.B. Viotti 3/5, 20133, Milan, Italy. .,Istituto Nazionale Genetica Molecolare "Romeo ed Enrica Invernizzi", Via Francesco Sforza, 35-20122, Milan, Italy.
| | - Susanna Zierler
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany.
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39
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Assessment of TRPM7 functions by drug-like small molecules. Cell Calcium 2017; 67:166-173. [DOI: 10.1016/j.ceca.2017.03.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 12/28/2022]
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40
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Wong R, Turlova E, Feng ZP, Rutka JT, Sun HS. Activation of TRPM7 by naltriben enhances migration and invasion of glioblastoma cells. Oncotarget 2017; 8:11239-11248. [PMID: 28061441 PMCID: PMC5355261 DOI: 10.18632/oncotarget.14496] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 12/26/2016] [Indexed: 01/09/2023] Open
Abstract
Glioblastoma (GBM), the most common and aggressive brain tumor in the central nervous system, remains a lethal diagnosis with a median survival of < 15 months. Aberrant expression of the TRPM7 channel has been linked to GBM functions. In this study, using the human GBM cell line U87, we evaluated the TRPM7 activator naltriben on GBM viability, migration, and invasiveness. First, using the whole-cell patch-clamp technique, we showed that naltriben enhanced the endogenous TRPM7-like current in U87 cells. In addition, with Fura-2 Ca2+ imaging, we observed robust Ca2+ influx following naltriben application. Naltriben significantly enhanced U87 cell migration and invasion (assessed with scratch wound assays, Matrigel invasion experiments, and MMP-2 protein expression), but not viability and proliferation (evaluated with MTT assays). Using Western immunoblots, we also detected the protein levels of p-Akt/t-Akt, and p-ERK1|2/t-ERK1|2. We found that naltriben enhanced the MAPK/ERK signaling pathway, but not the PI3k/Akt pathway. Therefore, potentiated TRPM7 activity contributes to the devastating migratory and invasive characteristics of GBM.
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Affiliation(s)
- Raymond Wong
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Ekaterina Turlova
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Zhong-Ping Feng
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - James T Rutka
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Hong-Shuo Sun
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Canada.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada.,Department of Pharmacology, Faculty of Medicine, University of Toronto, Toronto, Canada.,Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Canada
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41
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Zierler S, Hampe S, Nadolni W. TRPM channels as potential therapeutic targets against pro-inflammatory diseases. Cell Calcium 2017; 67:105-115. [PMID: 28549569 DOI: 10.1016/j.ceca.2017.05.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 05/02/2017] [Indexed: 02/08/2023]
Abstract
The immune system protects our body against foreign pathogens. However, if it overshoots or turns against itself, pro-inflammatory diseases, such as rheumatoid arthritis, inflammatory bowel disease, or diabetes develop. Ions, the most basic signaling molecules, shape intracellular signaling cascades resulting in immune cell activation and subsequent immune responses. Mutations in ion channels required for calcium signaling result in human immunodeficiencies and highlight those ion channels as valued targets for therapies against pro-inflammatory diseases. Signaling pathways regulated by melastatin-like transient receptor potential (TRPM) cation channels also play crucial roles in calcium signaling and leukocyte physiology, affecting phagocytosis, degranulation, chemokine and cytokine expression, chemotaxis and invasion, as well as lymphocyte development and proliferation. Therefore, this review discusses their regulation, possible interactions and whether they can be exploited as targets for therapeutic approaches to pro-inflammatory diseases.
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Affiliation(s)
- Susanna Zierler
- Walther Straub Institute of Pharmacology and Toxicology, LMU Munich, Germany.
| | - Sarah Hampe
- Walther Straub Institute of Pharmacology and Toxicology, LMU Munich, Germany
| | - Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, LMU Munich, Germany
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42
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Faouzi M, Kilch T, Horgen FD, Fleig A, Penner R. The TRPM7 channel kinase regulates store-operated calcium entry. J Physiol 2017; 595:3165-3180. [PMID: 28130783 DOI: 10.1113/jp274006] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 01/20/2017] [Indexed: 12/11/2022] Open
Abstract
KEY POINTS Pharmacological and molecular inhibition of transient receptor potential melastatin 7 (TRPM7) reduces store-operated calcium entry (SOCE). Overexpression of TRPM7 in TRPM7-/- cells restores SOCE. TRPM7 is not a store-operated calcium channel. TRPM7 kinase rather than channel modulates SOCE. TRPM7 channel activity contributes to the maintenance of store Ca2+ levels at rest. ABSTRACT The transient receptor potential melastatin 7 (TRPM7) is a protein that combines an ion channel with an intrinsic kinase domain, enabling it to modulate cellular functions either by conducting ions through the pore or by phosphorylating downstream proteins via its kinase domain. In the present study, we report store-operated calcium entry (SOCE) as a novel target of TRPM7 kinase activity. TRPM7-deficient chicken DT40 B lymphocytes exhibit a strongly impaired SOCE compared to wild-type cells as a result of reduced calcium release activated calcium currents, and independently of potassium channel regulation, membrane potential changes or changes in cell-cycle distribution. Pharmacological blockade of TRPM7 with NS8593 or waixenicin A in wild-type B lymphocytes results in a significant decrease in SOCE, confirming that TRPM7 activity is acutely linked to SOCE, without TRPM7 representing a store-operated channel itself. Using kinase-deficient mutants, we find that TRPM7 regulates SOCE through its kinase domain. Furthermore, Ca2+ influx through TRPM7 is essential for the maintenance of endoplasmic reticulum Ca2+ concentration in resting cells, and for the refilling of Ca2+ stores after a Ca2+ signalling event. We conclude that the channel kinase TRPM7 and SOCE are synergistic mechanisms regulating intracellular Ca2+ homeostasis.
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Affiliation(s)
- Malika Faouzi
- Centre for Biomedical Research, The Queen's Medical Centre, University of Hawaii Cancer Centre and John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Tatiana Kilch
- Centre for Biomedical Research, The Queen's Medical Centre, University of Hawaii Cancer Centre and John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - F David Horgen
- Laboratory of Marine Biological Chemistry, Department of Natural Sciences, Hawaii Pacific University, Kaneohe, HI, USA
| | - Andrea Fleig
- Centre for Biomedical Research, The Queen's Medical Centre, University of Hawaii Cancer Centre and John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Reinhold Penner
- Centre for Biomedical Research, The Queen's Medical Centre, University of Hawaii Cancer Centre and John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
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43
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Mass Spectrometric Analysis of TRPM6 and TRPM7 Phosphorylation Reveals Regulatory Mechanisms of the Channel-Kinases. Sci Rep 2017; 7:42739. [PMID: 28220887 PMCID: PMC5318989 DOI: 10.1038/srep42739] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/12/2017] [Indexed: 01/23/2023] Open
Abstract
TRPM7 and TRPM6 were the first identified bifunctional channels to contain their own kinase domains, but how these channel-kinases are regulated is poorly understood. Previous studies identified numerous phosphorylation sites on TRPM7, but very little is known about TRPM6 phosphorylation or sites on TRPM7 transphosphorylated by TRPM6. Our mass spectrometric analysis of homomeric and heteromeric TRPM7 and TRPM6 channels identified phosphorylation sites on both proteins, as well as several prominent sites on TRPM7 that are commonly modified through autophosphorylation and transphosphorylation by TRPM6. We conducted a series of amino acid substitution analyses and identified S1777, in TRPM7’s catalytic domain, and S1565, in TRPM7’s exchange domain that mediates kinase dimerization, as potential regulatory sites. The phosphomimetic S1777D substitution disrupted catalytic activity, most likely by causing an electrostatic perturbation at the active site. The S1565D phosphomimetic substitution also inactivated the kinase but did so without interfering with kinase dimerization. Molecular modeling indicates that phosphorylation of S1565 is predicted to structurally affect TRPM7’s functionally conserved N/D loop, which is thought to influence the access of substrate to the active site pocket. We propose that phosphorylation of S1565 within the exchange domain functions as a regulatory switch to control TRPM7 catalytic activity.
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44
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The different expression of TRPM7 and MagT1 impacts on the proliferation of colon carcinoma cells sensitive or resistant to doxorubicin. Sci Rep 2017; 7:40538. [PMID: 28094304 PMCID: PMC5240092 DOI: 10.1038/srep40538] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 12/07/2016] [Indexed: 01/16/2023] Open
Abstract
The processes leading to anticancer drug resistance are not completely unraveled. To get insights into the underlying mechanisms, we compared colon carcinoma cells sensitive to doxorubicin with their resistant counterpart. We found that resistant cells are growth retarded, and show staminal and ultrastructural features profoundly different from sensitive cells. The resistant phenotype is accompanied by the upregulation of the magnesium transporter MagT1 and the downregulation of the ion channel kinase TRPM7. We demonstrate that the different amounts of TRPM7 and MagT1 account for the different proliferation rate of sensitive and resistant colon carcinoma cells. It remains to be verified whether they are also involved in the control of other “staminal” traits.
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45
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Chen WL, Barszczyk A, Turlova E, Deurloo M, Liu B, Yang BB, Rutka JT, Feng ZP, Sun HS. Inhibition of TRPM7 by carvacrol suppresses glioblastoma cell proliferation, migration and invasion. Oncotarget 2016; 6:16321-40. [PMID: 25965832 PMCID: PMC4599272 DOI: 10.18632/oncotarget.3872] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/02/2015] [Indexed: 01/27/2023] Open
Abstract
Glioblastomas are progressive brain tumors with devastating proliferative and invasive characteristics. Ion channels are the second largest target class for drug development. In this study, we investigated the effects of the TRPM7 inhibitor carvacrol on the viability, resistance to apoptosis, migration, and invasiveness of the human U87 glioblastoma cell line. The expression levels of TRPM7 mRNA and protein in U87 cells were detected by RT-PCR, western blotting and immunofluorescence. TRPM7 currents were recorded using whole-cell patch-clamp techniques. An MTT assay was used to assess cell viability and proliferation. Wound healing and transwell experiments were used to evaluate cell migration and invasion. Protein levels of p-Akt/t-Akt, p-ERK1/2/t-ERK1/2, cleaved caspase-3, MMP-2 and phosphorylated cofilin were also detected. TRPM7 mRNA and protein expression in U87 cells is higher than in normal human astrocytes. Whole-cell patch-clamp recording showed that carvacrol blocks recombinant TRPM7 current in HEK293 cells and endogenous TRPM7-like current in U87 cells. Carvacrol treatment reduced the viability, migration and invasion of U87 cells. Carvacrol also decreased MMP-2 protein expression and promoted the phosphorylation of cofilin. Furthermore, carvacrol inhibited the Ras/MEK/MAPK and PI3K/Akt signaling pathways. Therefore, carvacrol may have therapeutic potential for the treatment of glioblastomas through its inhibition of TRPM7 channels.
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Affiliation(s)
- Wen-Liang Chen
- Department of Surgery, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Andrew Barszczyk
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Ekaterina Turlova
- Department of Surgery, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Marielle Deurloo
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Baosong Liu
- Department of Surgery, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Burton B Yang
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - James T Rutka
- Department of Surgery, University of Toronto, Toronto, Canada
| | - Zhong-Ping Feng
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Hong-Shuo Sun
- Department of Surgery, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada.,Department of Pharmacology, University of Toronto, Toronto, Canada.,Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Canada
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46
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Lin J, Zhou S, Zhao T, Ju T, Zhang L. TRPM7 channel regulates ox-LDL-induced proliferation and migration of vascular smooth muscle cells via MEK-ERK pathways. FEBS Lett 2016; 590:520-32. [PMID: 26900082 DOI: 10.1002/1873-3468.12088] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 01/20/2016] [Accepted: 01/25/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Jinghan Lin
- Department of Neurology; The First Affiliated Hospital of Harbin Medical University; China
| | - Shanshan Zhou
- Department of Neurology; The First Affiliated Hospital of Harbin Medical University; China
| | - Tingting Zhao
- Department of Neurology; The First Affiliated Hospital of Harbin Medical University; China
| | - Ting Ju
- Department of Neurology; The First Affiliated Hospital of Harbin Medical University; China
| | - Liming Zhang
- Department of Neurology; The First Affiliated Hospital of Harbin Medical University; China
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47
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Zierler S, Sumoza-Toledo A, Suzuki S, Dúill FÓ, Ryazanova LV, Penner R, Ryazanov AG, Fleig A. TRPM7 kinase activity regulates murine mast cell degranulation. J Physiol 2016; 594:2957-70. [PMID: 26660477 DOI: 10.1113/jp271564] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/10/2015] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS The Mg(2+) and Ca(2+) conducting transient receptor potential melastatin 7 (TRPM7) channel-enzyme (chanzyme) has been implicated in immune cell function. Mice heterozygous for a TRPM7 kinase deletion are hyperallergic, while mice with a single point mutation at amino acid 1648, silencing kinase activity, are not. As mast cell mediators trigger allergic reactions, we here determine the function of TRPM7 in mast cell degranulation and histamine release. Our data establish that TRPM7 kinase activity regulates mast cell degranulation and release of histamine independently of TRPM7 channel function. Our findings suggest a regulatory role of TRPM7 kinase activity on intracellular Ca(2+) and extracellular Mg(2+) sensitivity of mast cell degranulation. ABSTRACT Transient receptor potential melastatin 7 (TRPM7) is a divalent ion channel with a C-terminally located α-kinase. Mice heterozygous for a TRPM7 kinase deletion (TRPM7(+/∆K) ) are hypomagnesaemic and hyperallergic. In contrast, mice carrying a single point mutation at amino acid 1648, which silences TRPM7 kinase activity (TRPM7(KR) ), are not hyperallergic and are resistant to systemic magnesium (Mg(2+) ) deprivation. Since allergic reactions are triggered by mast cell-mediated histamine release, we investigated the function of TRPM7 on mast cell degranulation and histamine release using wild-type (TRPM7(+/+) ), TRPM7(+/∆K) and TRPM7(KR) mice. We found that degranulation and histamine release proceeded independently of TRPM7 channel function. Furthermore, extracellular Mg(2+) assured unperturbed IgE-DNP-dependent exocytosis, independently of TRPM7. However, impairment of TRPM7 kinase function suppressed IgE-DNP-dependent exocytosis, slowed the cellular degranulation rate, and diminished the sensitivity to intracellular calcium (Ca(2+) ) in G protein-induced exocytosis. In addition, G protein-coupled receptor (GPCR) stimulation revealed strong suppression of histamine release, whereas removal of extracellular Mg(2+) caused the phenotype to revert. We conclude that the TRPM7 kinase activity regulates murine mast cell degranulation by changing its sensitivity to intracellular Ca(2+) and affecting granular mobility and/or histamine contents.
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Affiliation(s)
- Susanna Zierler
- Center for Biomedical Research, The Queen's Medical Center and University of Hawaii John A. Burns School of Medicine and Cancer Center, Honolulu, HI, 96813, USA.,Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität München, 80336, Munich, Germany
| | - Adriana Sumoza-Toledo
- Center for Biomedical Research, The Queen's Medical Center and University of Hawaii John A. Burns School of Medicine and Cancer Center, Honolulu, HI, 96813, USA.,Instituto de Investigaciones Médico-Biológicas, Universidad Veracruzana, Colonia Centro CP 91700, Veracruz, Mexico
| | - Sayuri Suzuki
- Center for Biomedical Research, The Queen's Medical Center and University of Hawaii John A. Burns School of Medicine and Cancer Center, Honolulu, HI, 96813, USA
| | - Fionán Ó Dúill
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität München, 80336, Munich, Germany
| | - Lillia V Ryazanova
- Department of Pharmacology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ, 08854, USA
| | - Reinhold Penner
- Center for Biomedical Research, The Queen's Medical Center and University of Hawaii John A. Burns School of Medicine and Cancer Center, Honolulu, HI, 96813, USA
| | - Alexey G Ryazanov
- Department of Pharmacology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ, 08854, USA
| | - Andrea Fleig
- Center for Biomedical Research, The Queen's Medical Center and University of Hawaii John A. Burns School of Medicine and Cancer Center, Honolulu, HI, 96813, USA
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48
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Schäfer S, Ferioli S, Hofmann T, Zierler S, Gudermann T, Chubanov V. Mibefradil represents a new class of benzimidazole TRPM7 channel agonists. Pflugers Arch 2015; 468:623-34. [PMID: 26669310 DOI: 10.1007/s00424-015-1772-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/02/2015] [Accepted: 12/04/2015] [Indexed: 01/16/2023]
Abstract
Transient receptor potential cation channel, subfamily M, member 7 (TRPM7) is a bi-functional protein comprising an ion channel moiety covalently linked to a protein kinase domain. Currently, the prevailing view is that a decrease in the cytosolic Mg(2+) concentration leads to activation of divalent cation-selective TRPM7 currents. TRPM7 plays a role in immune responses, hypotension, tissue fibrosis, and tumor progression and, therefore, represents a new promising therapeutic target. Because of the dearth of pharmacological tools, our mechanistic understanding of the role of TRPM7 in physiology and pathophysiology still lags behind. Therefore, we have recently carried out a high throughput screen for small-molecule activators of TRPM7. We have characterized the phenanthrene naltriben as a first stimulatory agonist of the TRPM7 channel. Surprisingly, the effect of naltriben on TRPM7 was found to be unaffected by the physiological levels of cytosolic Mg(2+). Here, we demonstrate that mibefradil and NNC 50-0396, two benzimidazole relatives of the TRPM7 inhibitor NS8593, are positive modulators of TRPM7. Using Ca(2+) imaging and the patch-clamp technique, we show that mibefradil activates TRPM7-mediated Ca(2+) entry and whole-cell currents. The response to mibefradil was fast, reversible, and reproducible. In contrast to naltriben, mibefradil efficiently activates TRPM7 currents only at physiological intracellular Mg(2+) concentrations, and its stimulatory effect was fully abrogated by high internal Mg(2+) levels. Consequently, a TRPM7 variant harboring a gain-of-function mutation was insensitive to further mibefradil activation. Finally, we observed that the effect of mibefradil was selective for TRPM7 when various TRP channels were tested. Taken together, mibefradil acts as a Mg(2+)-regulated agonist of the TRPM7 channel and, hence, uncovers a new class of TRPM7 agonists.
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Affiliation(s)
- Sebastian Schäfer
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Silvia Ferioli
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Hofmann
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Susanna Zierler
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
- Comprehensive Pneumology Center Munich (CPC-M), German Center for Lung Research, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Munich Heart Alliance, Munich, Germany
| | - Vladimir Chubanov
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany.
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49
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Abstract
Calcium (Ca2+) and magnesium (Mg2+) ions have been shown to play an important role in regulating various neuronal functions. In the present review we focus on the emerging role of transient potential melastatin-7 (TRPM7) channel in not only regulating Ca2+ and Mg2+ homeostasis necessary for biological functions, but also how alterations in TRPM7 function/expression could induce neurodegeneration. Although eight TRPM channels have been identified, the channel properties, mode of activation, and physiological responses of various TRPM channels are quite distinct. Among the known 8 TRPM channels only TRPM6 and TRPM7 channels are highly permeable to both Ca2+ and Mg2+; however here we will only focus on TRPM7 as unlike TRPM6, TRPM7 channels are abundantly expressed in neuronal cells. Importantly, the discrepancy in TRPM7 channel function and expression leads to various neuronal diseases such as Alzheimer disease (AD) and Parkinson disease (PD). Further, it is emerging as a key factor in anoxic neuronal death and in other neurodegenerative disorders. Thus, by understanding the precise involvement of the TRPM7 channels in different neurodegenerative diseases and by understanding the factors that regulate TRPM7 channels, we could uncover new strategies in the future that could evolve as new drug therapeutic targets for effective treatment of these neurodegenerative diseases.
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Affiliation(s)
- Yuyang Sun
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Pramod Sukumaran
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Anne Schaar
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Brij B Singh
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
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50
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Regulatory role of guanine nucleotide exchange factor (GEF) Dock180 phosphorylation on Tyr/Ser in mediation of gastric mucosal Rac1 activation in response to Helicobacter pylori and ghrelin. Inflammopharmacology 2015; 23:111-8. [PMID: 25957600 DOI: 10.1007/s10787-015-0235-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 04/28/2015] [Indexed: 01/26/2023]
Abstract
A small GTPase, Rac1, is recognized as an important modulator of the inflammatory responses to bacterial lipopolysaccharide (LPS) by affecting the processes of phospholipase C activation. The activation of Rac1 involves the exchange of GDP for GTP and is catalyzed by the guanine nucleotide exchange factors (GEFs). Here, we report on the gastric mucosal GEF, Dock180, activation in response to H. pylori PS, and the hormone, ghrelin. We show that stimulation of gastric mucosal cells with the LPS leads to up-regulation in Dock180 phosphorylation on Tyr and Ser that is accompanied by a massive rise in Rac1-GTP level, while the effect of ghrelin, manifested by a drop in Dock180 phosphorylation on Ser, is associated with a decrease in Rac1-GTP formation. Furthermore, we demonstrate that phosphorylation on Tyr remains under the control of the Src family protein tyrosine kinases (SFK-PTKs), and is accompanied by Dock180 membrane translocation, while phosphorylation of the membrane-localized Dock180 on Ser represents the stimulatory contribution of protein kinase Cδ (PKCδ) to Dock180 activation. Moreover, we reveal that the interaction between Dock180 and PKCδ is dependent on Dock180 Tyr phosphorylation as well as the activity of PKCδ. Thus, our findings point to the involvement of PKCδ in the LPS-induced up-regulation of Dock180 activation, and suggest the modulatory mechanism of ghrelin influence on the gastric mucosal inflammatory responses to H. pylori.
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