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Zhao F, Yang T, Zhou L, Li R, Liu J, Zhao J, Jia R. Sig1R activates extracellular matrix-induced bladder cancer cell proliferation and angiogenesis by combing β-integrin. Aging (Albany NY) 2023; 15:204721. [PMID: 37199665 DOI: 10.18632/aging.204721] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 04/15/2023] [Indexed: 05/19/2023]
Abstract
The extracellular matrix (ECM) regulates many biological functions involved in tumorigenesis and tumor development; however, the underlying mechanism remains unknown. Sigma 1 receptor (Sig1R), a stress-activated chaperone, regulates the crosstalk between the ECM and tumor cells and is related to the malignant characteristics of several tumors. However, the link between Sig1R overexpression and ECM during malignancy has not been established in bladder cancer (BC). Here, we analyzed the interaction of Sig1R and β-integrin in BC cells and its role in ECM-mediated cell proliferation and angiogenesis. We found that Sig1R forms a complex with β-integrin to promote ECM-mediated BC cell proliferation and angiogenesis, which enhances the aggressiveness of the tumor cells. This leads to poor survival. Our research revealed that Sig1R mediates the cross-talk between BC cells and their ECM microenvironment, thereby driving the progression of BC. Promisingly, targeting an ion channel function through Sig1R inhibition may serve as a potential approach for BC treatment.
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Affiliation(s)
- Feng Zhao
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Tianli Yang
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Liuhua Zhou
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Rongfei Li
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Jingyu Liu
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Jun Zhao
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Ruipeng Jia
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
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Yokoyama R, Kojima H, Takai R, Ohta T, Maeda H, Miyashita K, Mutoh M, Terasaki M. Effects of CLIC4 on Fucoxanthinol-Induced Apoptosis in Human Colorectal Cancer Cells. Nutr Cancer 2020; 73:889-898. [PMID: 33703973 DOI: 10.1080/01635581.2020.1779760] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Fucoxanthin is a marine xanthophyll found in edible brown algae, and a metabolite, fucoxanthinol (FxOH), possesses a potent apoptosis inducing effect in many cancer cells. Chloride intracellular channel 4 (CLIC4) is a member of the CLIC family that plays an important role in cancer development and apoptosis. However, the role of CLIC4 in FxOH-induced apoptosis is not well understood. In this study, we investigated whether CLIC4 affects the apoptotic properties of FxOH in human colorectal cancer (CRC) cells under FxOH treatment. Treating human CRC DLD-1 cells with 5.0 μmol/L FxOH significantly induced apoptosis. FxOH downregulated CLIC4, integrin β1, NHERF2 and pSmad2 (Ser465/467) by 0.6-, 0.7-, 0.7-, and 0.5-fold, respectively, compared with control cells without alteration of Rab35 expression. No colocalizing change was observed in CLIC4-related proteins in either control or FxOH-treated cells. CLIC4 knockdown suppressed cell growth and apoptosis. Interestingly, apoptosis induction by FxOH almost disappeared with CLIC4 knockdown. Our findings suggested that CLIC4 could be involved in FxOH-induced apoptosis in human CRC.
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Affiliation(s)
- Reo Yokoyama
- School of Pharmaceutical Sciences, Health Science University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Hiroyuki Kojima
- School of Pharmaceutical Sciences, Health Science University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Rie Takai
- Research Institute of Health Sciences, Health Science University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Tohru Ohta
- Research Institute of Health Sciences, Health Science University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori, Japan
| | - Kazuo Miyashita
- Laboratory of Biofunctional Material Chemistry, Division of Marine Bioscience, Graduate School of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido, Japan
| | - Michihiro Mutoh
- Epidemiology and Preventions Group, Center for Public Health Sciences, National Cancer Center, Chuo-ku, Tokyo, Japan
| | - Masaru Terasaki
- School of Pharmaceutical Sciences, Health Science University of Hokkaido, Ishikari-Tobetsu, Japan.,Cancer Prevention Laboratories, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
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Zhang X, Wang Z, Li W, Huang R, Zheng D, Bi G. MicroRNA-217-5p ameliorates endothelial cell apoptosis induced by ox-LDL by targeting CLIC4. Nutr Metab Cardiovasc Dis 2020; 30:523-533. [PMID: 31744714 DOI: 10.1016/j.numecd.2019.09.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 09/24/2019] [Accepted: 09/24/2019] [Indexed: 01/29/2023]
Abstract
BACKGROUND AND AIMS Endothelial cell apoptosis plays an essential role in the pathogenesis of atherosclerosis. MicroRNAs and chloride intracellular channels (CLICs) have been verified to participate in the endothelial cell apoptosis process, however, the underlying molecular mechanisms are still unclear. The main aim of this study was to investigate the biological effects of microRNA-217-5p (miR-217-5p) and CLIC4 on endothelial cell apoptosis in atherosclerosis. METHODS AND RESULTS An atherosclerotic mouse model (n = 18) was constructed by feeding apolipo protein E knockout ApoE(-/-) mice with high-fat diet for 12 weeks. An atherosclerotic cell model was established by treating human aortic endothelial cells with oxidized low-density lipoprotein (ox-LDL; 50 μg/mL) for 24 h. Quantitative real-time polymerase chain reaction and immunofluorescent staining confirmed the downregulation of miR-217-5p and upregulation of CLIC4 in atherosclerotic endothelial cells. Combined with western blot, flow cytometry assay and Hoechst staining, we demonstrated that miR-217-5p upregulation or CLIC4 knockdown regulated the apoptosis-related genes, ameliorated mitochondrial membrane permeability and therefore inhibited the apoptosis of aortic endothelial cells induced by ox-LDL. We further confirmed that miR-217-5p inhibited apoptosis of endothelial cells through targeting CLIC4 using luciferase report assay and rescue experiments. CONCLUSION We revealed for the first time that miR-217-5p inhibited apoptosis of endothelial cells in atherosclerosis and identified CLIC4 as a novel target of miR-217-5p. Our work provides a potential therapeutic approach for the treatment of atherosclerosis.
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Affiliation(s)
- Xiaotian Zhang
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China
| | - Zhimin Wang
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China
| | - Weishuai Li
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China
| | - Rui Huang
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China
| | - Dongming Zheng
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China
| | - Guorong Bi
- Department of Neurology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, People's Republic of China.
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Gururaja Rao S, Patel NJ, Singh H. Intracellular Chloride Channels: Novel Biomarkers in Diseases. Front Physiol 2020; 11:96. [PMID: 32116799 PMCID: PMC7034325 DOI: 10.3389/fphys.2020.00096] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 01/27/2020] [Indexed: 12/27/2022] Open
Abstract
Ion channels are integral membrane proteins present on the plasma membrane as well as intracellular membranes. In the human genome, there are more than 400 known genes encoding ion channel proteins. Ion channels are known to regulate several cellular, organellar, and physiological processes. Any mutation or disruption in their function can result in pathological disorders, both common or rare. Ion channels present on the plasma membrane are widely acknowledged for their role in various biological processes, but in recent years, several studies have pointed out the importance of ion channels located in intracellular organelles. However, ion channels located in intracellular organelles are not well-understood in the context of physiological conditions, such as the generation of cellular excitability and ionic homeostasis. Due to the lack of information regarding their molecular identity and technical limitations of studying them, intracellular organelle ion channels have thus far been overlooked as potential therapeutic targets. In this review, we focus on a novel class of intracellular organelle ion channels, Chloride Intracellular Ion Channels (CLICs), mainly documented for their role in cardiovascular, neurophysiology, and tumor biology. CLICs have a single transmembrane domain, and in cells, they exist in cytosolic as well as membranous forms. They are predominantly present in intracellular organelles and have recently been shown to be localized to cardiomyocyte mitochondria as well as exosomes. In fact, a member of this family, CLIC5, is the first mitochondrial chloride channel to be identified on the molecular level in the inner mitochondrial membrane, while another member, CLIC4, is located predominantly in the outer mitochondrial membrane. In this review, we discuss this unique class of intracellular chloride channels, their role in pathologies, such as cardiovascular, cancer, and neurodegenerative diseases, and the recent developments concerning their usage as theraputic targets.
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Affiliation(s)
- Shubha Gururaja Rao
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Neel J Patel
- Department of Cardiology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Harpreet Singh
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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Li B, Zhao Y, Song M, Cui H, Feng X, Yang T, Fan HG. Role of c-Myc/chloride intracellular channel 4 pathway in lipopolysaccharide-induced neurodegenerative diseases. Toxicology 2019; 429:152312. [PMID: 31693917 DOI: 10.1016/j.tox.2019.152312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 09/21/2019] [Accepted: 10/16/2019] [Indexed: 12/21/2022]
Abstract
LPS-induced neuronal apoptosis leads to neurodegenerative diseases (NDs). However, the mechanisms underlying NDs pathogenesis remains unclear. The apoptotic response to activation of the c-Myc/chloride intracellular channel (CLIC4) pathway is directed through a mitochondrial pathway. In this study, we aimed to explore the c-Myc/CLIC4 pathway in the progression of NDs induced by lipopolysaccharide (LPS). In an in vivo experiment, the results of HE staining, transmission electron microscopic, immunofluorescence microscopy of cleaved caspase-3 and Bax and the increasing expression of apoptotic pathway related proteins in mitochondria showed that LPS (10 mg/kg) administration damaged mitochondrial and induced hippocampal neuron apoptosis. The Western blot and RT-PCR indicated that LPS induced the activation of c-Myc/CLIC4 pathway. Furthermore, in an in vitro experiment, PC12 cells were exposed to LPS to induce cell injuries to mimic the model of NDs. To further confirm the role of the c-Myc/CLIC4 pathway in LPS-induced neuronal apoptosis, the gene knockout of c-Myc and CLIC4 were performed by CRISPR/Cas9. The results of the flow cytometry assay and Annexin V-FITC/PI showed that knocking out c-Myc and CLIC4 significantly reduced cell apoptosis. The results of Western blot and dual immunofluorescence with Cyt c and TOM20 showed that knocking out c-Myc and CLIC4 significantly reduced the expression of mitochondrial apoptosis-related proteins. Our data confirmed that LPS-induced apoptosis is regulated by the activation of c-Myc/CLIC4 pathway. These results support further research mechanisms underlying neurodegenerative diseases and can provide effective pharmacodynamic targets for the clinical development of therapeutic drugs for neurodegenerative diseases.
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Affiliation(s)
- Bei Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - Yuan Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - ManYu Song
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - HaiLin Cui
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - XiuJing Feng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - TianYuan Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China
| | - Hong-Gang Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, PR China.
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