51
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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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52
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Anderson KJ, Cormier RT, Scott PM. Role of ion channels in gastrointestinal cancer. World J Gastroenterol 2019; 25:5732-5772. [PMID: 31636470 PMCID: PMC6801186 DOI: 10.3748/wjg.v25.i38.5732] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/26/2019] [Accepted: 09/27/2019] [Indexed: 02/06/2023] Open
Abstract
In their seminal papers Hanahan and Weinberg described oncogenic processes a normal cell undergoes to be transformed into a cancer cell. The functions of ion channels in the gastrointestinal (GI) tract influence a variety of cellular processes, many of which overlap with these hallmarks of cancer. In this review we focus on the roles of the calcium (Ca2+), sodium (Na+), potassium (K+), chloride (Cl-) and zinc (Zn2+) transporters in GI cancer, with a special emphasis on the roles of the KCNQ1 K+ channel and CFTR Cl- channel in colorectal cancer (CRC). Ca2+ is a ubiquitous second messenger, serving as a signaling molecule for a variety of cellular processes such as control of the cell cycle, apoptosis, and migration. Various members of the TRP superfamily, including TRPM8, TRPM7, TRPM6 and TRPM2, have been implicated in GI cancers, especially through overexpression in pancreatic adenocarcinomas and down-regulation in colon cancer. Voltage-gated sodium channels (VGSCs) are classically associated with the initiation and conduction of action potentials in electrically excitable cells such as neurons and muscle cells. The VGSC NaV1.5 is abundantly expressed in human colorectal CRC cell lines as well as being highly expressed in primary CRC samples. Studies have demonstrated that conductance through NaV1.5 contributes significantly to CRC cell invasiveness and cancer progression. Zn2+ transporters of the ZIP/SLC39A and ZnT/SLC30A families are dysregulated in all major GI organ cancers, in particular, ZIP4 up-regulation in pancreatic cancer (PC). More than 70 K+ channel genes, clustered in four families, are found expressed in the GI tract, where they regulate a range of cellular processes, including gastrin secretion in the stomach and anion secretion and fluid balance in the intestinal tract. Several distinct types of K+ channels are found dysregulated in the GI tract. Notable are hERG1 upregulation in PC, gastric cancer (GC) and CRC, leading to enhanced cancer angiogenesis and invasion, and KCNQ1 down-regulation in CRC, where KCNQ1 expression is associated with enhanced disease-free survival in stage II, III, and IV disease. Cl- channels are critical for a range of cellular and tissue processes in the GI tract, especially fluid balance in the colon. Most notable is CFTR, whose deficiency leads to mucus blockage, microbial dysbiosis and inflammation in the intestinal tract. CFTR is a tumor suppressor in several GI cancers. Cystic fibrosis patients are at a significant risk for CRC and low levels of CFTR expression are associated with poor overall disease-free survival in sporadic CRC. Two other classes of chloride channels that are dysregulated in GI cancers are the chloride intracellular channels (CLIC1, 3 & 4) and the chloride channel accessory proteins (CLCA1,2,4). CLIC1 & 4 are upregulated in PC, GC, gallbladder cancer, and CRC, while the CLCA proteins have been reported to be down-regulated in CRC. In summary, it is clear, from the diverse influences of ion channels, that their aberrant expression and/or activity can contribute to malignant transformation and tumor progression. Further, because ion channels are often localized to the plasma membrane and subject to multiple layers of regulation, they represent promising clinical targets for therapeutic intervention including the repurposing of current drugs.
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Affiliation(s)
- Kyle J Anderson
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, United States
| | - Robert T Cormier
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, United States
| | - Patricia M Scott
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, United States
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Redox TRPs in diabetes and diabetic complications: Mechanisms and pharmacological modulation. Pharmacol Res 2019; 146:104271. [PMID: 31096011 DOI: 10.1016/j.phrs.2019.104271] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/04/2019] [Accepted: 05/08/2019] [Indexed: 12/12/2022]
Abstract
Transient receptor potential (TRP) channels have shown to be involved in a wide variety of physiological functions and pathophysiological conditions. Modulation of TRP channels reported to play a major role in number of disorders starting from central nervous system related disorders to cardiovascular, inflammatory, cancer, gastrointestinal and metabolic diseases. Recently, a subset of TRP ion channels called redox TRPs gained importance on account of their ability to sense the cellular redox environment and respond accordingly to such redox stimuli. Diabetes, the silent epidemic of the world is increasing at an alarming rate in spite of novel therapeutic interventions. Moreover, diabetes and its associated complications are reported to arise due to a change in oxidative status of cell induced by hyperglycemia. Such a change in cellular oxidative status can modulate the activities of various redox TRP channels (TRPA1, TRPC5, TRPMs and TRPV1). Targeting redox TRPs have potential in diabetes and diabetic complications like neuropathy, cardiomyopathy, retinopathy, cystopathy, and encephalopathy. Thus in this review, we have discussed the activities of different redox sensing TRPs in diabetes and diabetic complications and how they can be modulated pharmacologically, so as to consider them a potential novel therapeutic target in treating diabetes and its comorbidity.
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54
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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: 94] [Impact Index Per Article: 18.8] [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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55
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Liu X, Gan L, Zhang J. miR-543 inhibites cervical cancer growth and metastasis by targeting TRPM7. Chem Biol Interact 2019; 302:83-92. [PMID: 30710498 DOI: 10.1016/j.cbi.2019.01.036] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/15/2018] [Accepted: 01/29/2019] [Indexed: 10/27/2022]
Abstract
Dysregulation of miR-543 has been implicated to play crucial roles in various human cancers. However, the function of miR-543 involved in cervical cancer (CC) progress remains largely unknown. Thus, this study aimed to explore the potential role of miR-543 and the underlying mechanisms in human CC. In this study, we found that miR-543 was significantly downregulated in 69 CC tissue samples and cell lines when compared to adjacent normal tissues and cell line. Decreased miR-543 was closely correlated with poor clinicopathological parameters including larger tumor size, late FIGO stage and lymph node metastasis. Overexpression of miR-543 in CC cell lines remarkably inhibited cell proliferation, invasion and migration, caused cell cycle arrest, promoted apoptosis in vitro, and suppressed tumor growth in vivo, whereas miR-543 inhibitor showed the opposite effect. Dual-luciferase assay validated that 3'-untranslated region (UTR) of transient receptor potential melastatin 7 (TRPM7) was a direct binding site of miR-543. Rescue experiments showed that restoration of TRPM7 expression partially reversed the miR-543-mediated inhibition of proliferation and invasion in CC cells. Further studies confirmed that P13K/AKT and p38/MAPK signaling was involved in miR-543/TRPM7 axis mediated CC progression. Thus, these findings demonstrated the tumor suppressor role of miR-543 on CC progression, which might serve as a potential biomarker for CC diagnosis and therapy.
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Affiliation(s)
- Xiaoying Liu
- Department of Gynecology, Shaanxi Provincial People's Hospital, 710068, Shaanxi, China.
| | - Lu Gan
- Department of Gynecology, Shaanxi Provincial People's Hospital, 710068, Shaanxi, China
| | - Jing Zhang
- Department of Gynecology, Shaanxi Provincial People's Hospital, 710068, Shaanxi, China
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56
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Thuringer D, Chanteloup G, Winckler P, Garrido C. The vesicular transfer of CLIC1 from glioblastoma to microvascular endothelial cells requires TRPM7. Oncotarget 2018; 9:33302-33311. [PMID: 30279961 PMCID: PMC6161795 DOI: 10.18632/oncotarget.26048] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 08/16/2018] [Indexed: 01/01/2023] Open
Abstract
Chloride intracellular channel 1 (CLIC1) is highly expressed and secreted by human glioblastoma cells and cell lines such as U87, initiating cell migration and tumor growth. Here, we examined whether CLIC1 could be transferred to human primary microvascular endothelial cells (HMEC). We previously reported that the oncogenic microRNA, miR-5096, increased the release of extracellular vesicles (EVs) by which it increased its own transfer from U87 to surrounding cells. Thus, we also examined its effect on the CLIC1 transfer. In homotypic cultures, miR-5096 did not increase the expression of CLIC1 in U87 nor in HMEC. However, the endothelial CLIC1 level increased after exposure to EVs released by U87, and even more by miR-5096-loaded U87. The EVs-transferred CLIC1 was active in HMEC, promoting endothelial sprouting in matrigel. Cell exposure to EVs induced cytosolic Ca2+ spikes which were dependent on the transient receptor potential melastatin member 7 (TRPM7). TRPM7 silencing prevented Ca2+ spikes and the subsequent CLIC1 delivery into HMEC. Our data suggest that the vesicular transfer of CLIC1 between cells requires TRMP7 expression in recipient endothelial cells. How the vesicular transfer of CLIC1 is modulated in cancer therapy is a future challenge.
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Affiliation(s)
- Dominique Thuringer
- INSERM U1231, Laboratory of Excellence Ligue Nationale contre le Cancer, 21000 Dijon, France.,Université de Bourgogne Franche Comté, 21000 Dijon, France
| | - Gaetan Chanteloup
- INSERM U1231, Laboratory of Excellence Ligue Nationale contre le Cancer, 21000 Dijon, France.,Université de Bourgogne Franche Comté, 21000 Dijon, France
| | - Pascale Winckler
- AgroSup Dijon, PAM UMR, DImaCell Imaging Facility, Université de Bourgogne Franche Comté, 21000 Dijon, France
| | - Carmen Garrido
- INSERM U1231, Laboratory of Excellence Ligue Nationale contre le Cancer, 21000 Dijon, France.,Université de Bourgogne Franche Comté, 21000 Dijon, France.,Centre Georges François Leclerc (CGFL), 21000 Dijon, France
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Zhao Z, Zhang M, Duan X, Chen Y, Li E, Luo L, Wu W, Peng Z, Qiu H, Zeng G. TRPM7 Regulates AKT/FOXO1–Dependent Tumor Growth and Is an Independent Prognostic Indicator in Renal Cell Carcinoma. Mol Cancer Res 2018; 16:1013-1023. [PMID: 29545479 DOI: 10.1158/1541-7786.mcr-17-0767] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/15/2018] [Accepted: 03/06/2018] [Indexed: 11/16/2022]
Affiliation(s)
- Zhijian Zhao
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China.
| | - Mengping Zhang
- Department of Oncology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaolu Duan
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Yiwen Chen
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Ermao Li
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Lianmin Luo
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Wenqi Wu
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Zhenwei Peng
- Department of Oncology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
| | - Huijuan Qiu
- Department of VIP, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.
| | - Guohua Zeng
- Department of Urology, The First Affiliated Hospital of Guangzhou Medical University, and Guangdong Key Laboratory of Urology, Guangzhou, China.
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58
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Transient Receptor Potential (TRP) Channels in Drug Discovery: Old Concepts & New Thoughts. Pharmaceuticals (Basel) 2017; 10:ph10030064. [PMID: 28684697 PMCID: PMC5620608 DOI: 10.3390/ph10030064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 06/26/2017] [Accepted: 06/26/2017] [Indexed: 01/04/2023] Open
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