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Sakellakis M, Yoon SM, Reet J, Chalkias A. Novel insights into voltage-gated ion channels: Translational breakthroughs in medical oncology. Channels (Austin) 2024; 18:2297605. [PMID: 38154047 PMCID: PMC10761148 DOI: 10.1080/19336950.2023.2297605] [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: 10/10/2023] [Accepted: 12/05/2023] [Indexed: 12/30/2023] Open
Abstract
Preclinical evidence suggests that voltage gradients can act as a kind of top-down master regulator during embryogenesis and orchestrate downstream molecular-genetic pathways during organ regeneration or repair. Moreover, electrical stimulation shifts response to injury toward regeneration instead of healing or scarring. Cancer and embryogenesis not only share common phenotypical features but also commonly upregulated molecular pathways. Voltage-gated ion channel activity is directly or indirectly linked to the pathogenesis of cancer hallmarks, while experimental and clinical studies suggest that their modulation, e.g., by anesthetic agents, may exert antitumor effects. A large recent clinical trial served as a proof-of-principle for the benefit of preoperative use of topical sodium channel blockade as a potential anticancer strategy against early human breast cancers. Regardless of whether ion channel aberrations are primary or secondary cancer drivers, understanding the functional consequences of these events may guide us toward the development of novel therapeutic approaches.
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Affiliation(s)
- Minas Sakellakis
- Department of Medicine, Jacobi North Central Bronx Hospital, Bronx, USA
| | - Sung Mi Yoon
- Department of Medicine, Jacobi North Central Bronx Hospital, Bronx, USA
| | - Jashan Reet
- Department of Medicine, Jacobi North Central Bronx Hospital, Bronx, USA
| | - Athanasios Chalkias
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
- Outcomes Research Consortium, Cleveland, OH, USA
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Tran MT, Ho CNQ, Hoang SN, Doan CC, Nguyen MT, Van HD, Ly CN, Le CPM, Hoang HNQ, Nguyen HTM, Truong HT, To QM, Nguyen TTT, Le LT. Morphological Changes of 3T3 Cells under Simulated Microgravity. Cells 2024; 13:344. [PMID: 38391957 PMCID: PMC10887114 DOI: 10.3390/cells13040344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/10/2024] [Accepted: 02/12/2024] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND Cells are sensitive to changes in gravity, especially the cytoskeletal structures that determine cell morphology. The aim of this study was to assess the effects of simulated microgravity (SMG) on 3T3 cell morphology, as demonstrated by a characterization of the morphology of cells and nuclei, alterations of microfilaments and microtubules, and changes in cycle progression. METHODS 3T3 cells underwent induced SMG for 72 h with Gravite®, while the control group was under 1G. Fluorescent staining was applied to estimate the morphology of cells and nuclei and the cytoskeleton distribution of 3T3 cells. Cell cycle progression was assessed by using the cell cycle app of the Cytell microscope, and Western blot was conducted to determine the expression of the major structural proteins and main cell cycle regulators. RESULTS The results show that SMG led to decreased nuclear intensity, nuclear area, and nuclear shape and increased cell diameter in 3T3 cells. The 3T3 cells in the SMG group appeared to have a flat form and diminished microvillus formation, while cells in the control group displayed an apical shape and abundant microvilli. The 3T3 cells under SMG exhibited microtubule distribution surrounding the nucleus, compared to the perinuclear accumulation in control cells. Irregular forms of the contractile ring and polar spindle were observed in 3T3 cells under SMG. The changes in cytoskeleton structure were caused by alterations in the expression of major cytoskeletal proteins, including β-actin and α-tubulin 3. Moreover, SMG induced 3T3 cells into the arrest phase by reducing main cell cycle related genes, which also affected the formation of cytoskeleton structures such as microfilaments and microtubules. CONCLUSIONS These results reveal that SMG generated morphological changes in 3T3 cells by remodeling the cytoskeleton structure and downregulating major structural proteins and cell cycle regulators.
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Affiliation(s)
- Minh Thi Tran
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City 70000, Vietnam;
| | - Chi Nguyen Quynh Ho
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Department, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City 100000, Vietnam
| | - Son Nghia Hoang
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Department, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City 100000, Vietnam
| | - Chung Chinh Doan
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Department, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City 100000, Vietnam
| | - Minh Thai Nguyen
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
| | - Huy Duc Van
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
| | - Cang Ngoc Ly
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
| | - Cuong Phan Minh Le
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
| | - Huy Nghia Quang Hoang
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Department, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City 100000, Vietnam
| | - Han Thai Minh Nguyen
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Innovation Center, University of New Hampshire, Manchester, NH 03101, USA
| | - Han Thi Truong
- Department of Biophysics, Sungkyunkwan University, Suwon 16419, Republic of Korea;
| | - Quan Minh To
- Faculty of Biology and Biotechnology, University of Science, Ho Chi Minh City 70000, Vietnam;
| | - Tram Thi Thuy Nguyen
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Faculty of General Biomedical, University of Physical Education and Sport, Ho Chi Minh City 70000, Vietnam
| | - Long Thanh Le
- Animal Biotechnology Department, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam; (C.N.Q.H.); (S.N.H.); (C.C.D.); (M.T.N.); (H.D.V.); (C.N.L.); (C.P.M.L.); (H.N.Q.H.); (H.T.M.N.); (T.T.T.N.)
- Biotechnology Department, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City 100000, Vietnam
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Dupuy M, Gueguinou M, Potier-Cartereau M, Lézot F, Papin M, Chantôme A, Rédini F, Vandier C, Verrecchia F. SK Ca- and Kv1-type potassium channels and cancer: Promising therapeutic targets? Biochem Pharmacol 2023; 216:115774. [PMID: 37678626 DOI: 10.1016/j.bcp.2023.115774] [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: 06/28/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/09/2023]
Abstract
Ion channels are transmembrane structures that allow the passage of ions across cell membranes such as the plasma membrane or the membranes of various organelles like the nucleus, endoplasmic reticulum, Golgi apparatus or mitochondria. Aberrant expression of various ion channels has been demonstrated in several tumor cells, leading to the promotion of key functions in tumor development, such as cell proliferation, resistance to apoptosis, angiogenesis, invasion and metastasis. The link between ion channels and these key biological functions that promote tumor development has led to the classification of cancers as oncochannelopathies. Among all ion channels, the most varied and numerous, forming the largest family, are the potassium channels, with over 70 genes encoding them in humans. In this context, this review will provide a non-exhaustive overview of the role of plasma membrane potassium channels in cancer, describing 1) the nomenclature and structure of potassium channels, 2) the role of these channels in the control of biological functions that promotes tumor development such as proliferation, migration and cell death, and 3) the role of two particular classes of potassium channels, the SKCa- and Kv1- type potassium channels in cancer progression.
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Affiliation(s)
- Maryne Dupuy
- Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, F-44000 Nantes, France.
| | | | | | - Frédéric Lézot
- Sorbonne University, INSERM UMR933, Hôpital Trousseau (AP-HP), Paris F-75012, France
| | - Marion Papin
- N2C UMR 1069, University of Tours, INSERM, Tours, France
| | | | - Françoise Rédini
- Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, F-44000 Nantes, France
| | | | - Franck Verrecchia
- Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, F-44000 Nantes, France.
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Randhawa K, Jahani-Asl A. CLIC1 regulation of cancer stem cells in glioblastoma. CURRENT TOPICS IN MEMBRANES 2023; 92:99-123. [PMID: 38007271 DOI: 10.1016/bs.ctm.2023.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2023]
Abstract
Chloride intracellular channel 1 (CLIC1) has emerged as a therapeutic target in various cancers. CLIC1 promotes cell cycle progression and cancer stem cell (CSC) self-renewal. Furthermore, CLIC1 is shown to play diverse roles in proliferation, cell volume regulation, tumour invasion, migration, and angiogenesis. In glioblastoma (GB), CLIC1 facilitates the G1/S phase transition and tightly regulates glioma stem-like cells (GSCs), a rare population of self-renewing CSCs with central roles in tumour resistance to therapy and tumour recurrence. CLIC1 is found as either a monomeric soluble protein or as a non-covalent dimeric protein that can form an ion channel. The ratio of dimeric to monomeric protein is altered in GSCs and depends on the cell redox state. Elucidating the mechanisms underlying the alterations in CLIC1 expression and structural transitions will further our understanding of its role in GSC biology. This review will highlight the role of CLIC1 in GSCs and its significance in facilitating different hallmarks of cancer.
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Affiliation(s)
- Kamaldeep Randhawa
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada; Brain and Mind Research Institute, University of Ottawa, Ottawa, ON, Canada
| | - Arezu Jahani-Asl
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada; Brain and Mind Research Institute, University of Ottawa, Ottawa, ON, Canada; Regenerative Medicine Program and Cancer Therapeutics Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.
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5
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Ion Channels in Gliomas-From Molecular Basis to Treatment. Int J Mol Sci 2023; 24:ijms24032530. [PMID: 36768856 PMCID: PMC9916861 DOI: 10.3390/ijms24032530] [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: 11/30/2022] [Revised: 01/11/2023] [Accepted: 01/17/2023] [Indexed: 01/31/2023] Open
Abstract
Ion channels provide the basis for the nervous system's intrinsic electrical activity. Neuronal excitability is a characteristic property of neurons and is critical for all functions of the nervous system. Glia cells fulfill essential supportive roles, but unlike neurons, they also retain the ability to divide. This can lead to uncontrolled growth and the formation of gliomas. Ion channels are involved in the unique biology of gliomas pertaining to peritumoral pathology and seizures, diffuse invasion, and treatment resistance. The emerging picture shows ion channels in the brain at the crossroads of neurophysiology and fundamental pathophysiological processes of specific cancer behaviors as reflected by uncontrolled proliferation, infiltration, resistance to apoptosis, metabolism, and angiogenesis. Ion channels are highly druggable, making them an enticing therapeutic target. Targeting ion channels in difficult-to-treat brain tumors such as gliomas requires an understanding of their extremely heterogenous tumor microenvironment and highly diverse molecular profiles, both representing major causes of recurrence and treatment resistance. In this review, we survey the current knowledge on ion channels with oncogenic behavior within the heterogeneous group of gliomas, review ion channel gene expression as genomic biomarkers for glioma prognosis and provide an update on therapeutic perspectives for repurposed and novel ion channel inhibitors and electrotherapy.
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Oh S, Lee C, Yang W, Li A, Mukherjee A, Basan M, Ran C, Yin W, Tabin CJ, Fu D, Xie XS, Kirschner MW. Protein and lipid mass concentration measurement in tissues by stimulated Raman scattering microscopy. Proc Natl Acad Sci U S A 2022; 119:e2117938119. [PMID: 35452314 PMCID: PMC9169924 DOI: 10.1073/pnas.2117938119] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/21/2022] [Indexed: 01/10/2023] Open
Abstract
Cell mass and chemical composition are important aggregate cellular properties that are especially relevant to physiological processes, such as growth control and tissue homeostasis. Despite their importance, it has been difficult to measure these features quantitatively at the individual cell level in intact tissue. Here, we introduce normalized Raman imaging (NoRI), a stimulated Raman scattering (SRS) microscopy method that provides the local concentrations of protein, lipid, and water from live or fixed tissue samples with high spatial resolution. Using NoRI, we demonstrate that protein, lipid, and water concentrations at the single cell are maintained in a tight range in cells under the same physiological conditions and are altered in different physiological states, such as cell cycle stages, attachment to substrates of different stiffness, or by entering senescence. In animal tissues, protein and lipid concentration varies with cell types, yet an unexpected cell-to-cell heterogeneity was found in cerebellar Purkinje cells. The protein and lipid concentration profile provides means to quantitatively compare disease-related pathology, as demonstrated using models of Alzheimer’s disease. This demonstration shows that NoRI is a broadly applicable technique for probing the biological regulation of protein mass, lipid mass, and water mass for studies of cellular and tissue growth, homeostasis, and disease.
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Affiliation(s)
- Seungeun Oh
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - ChangHee Lee
- Department of Genetics, Harvard Medical School, Boston, MA 02115
| | - Wenlong Yang
- Center for Advanced Imaging, Harvard University, Cambridge, MA 20138
| | - Ang Li
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Avik Mukherjee
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Markus Basan
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Chongzhao Ran
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129
| | - Wei Yin
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129
| | | | - Dan Fu
- Department of Chemistry, University of Washington, Seattle, WA 98195
| | - X. Sunney Xie
- Biomedical Pioneering Innovation Center, Peking University, Beijing 100871; China
| | - Marc W. Kirschner
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
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George LF, Bates EA. Mechanisms Underlying Influence of Bioelectricity in Development. Front Cell Dev Biol 2022; 10:772230. [PMID: 35237593 PMCID: PMC8883286 DOI: 10.3389/fcell.2022.772230] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/07/2022] [Indexed: 12/25/2022] Open
Abstract
To execute the intricate process of development, cells coordinate across tissues and organs to determine where each cell divides and differentiates. This coordination requires complex communication between cells. Growing evidence suggests that bioelectrical signals controlled via ion channels contribute to cell communication during development. Ion channels collectively regulate the transmembrane potential of cells, and their function plays a conserved role in the development of organisms from flies to humans. Spontaneous calcium oscillations can be found in nearly every cell type and tissue, and disruption of these oscillations leads to defects in development. However, the mechanism by which bioelectricity regulates development is still unclear. Ion channels play essential roles in the processes of cell death, proliferation, migration, and in each of the major canonical developmental signaling pathways. Previous reviews focus on evidence for one potential mechanism by which bioelectricity affects morphogenesis, but there is evidence that supports multiple different mechanisms which are not mutually exclusive. Evidence supports bioelectricity contributing to development through multiple different mechanisms. Here, we review evidence for the importance of bioelectricity in morphogenesis and provide a comprehensive review of the evidence for several potential mechanisms by which ion channels may act in developmental processes.
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Affiliation(s)
- Laura Faith George
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, United States
| | - Emily Anne Bates
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, United States
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Simulated Microgravity Induces the Proliferative Inhibition and Morphological Changes in Porcine Granulosa Cells. Curr Issues Mol Biol 2021; 43:2210-2219. [PMID: 34940129 PMCID: PMC8929043 DOI: 10.3390/cimb43030155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 11/16/2022] Open
Abstract
Astronauts are always faced with serious health problems during prolonged spaceflights. Previous studies have shown that weightlessness significantly affects the physiological function of female astronauts, including a change in reproductive hormones and ovarian cells, such as granulosa and theca cells. However, the effects of microgravity on these cells have not been well characterized, especially in granulosa cells. This study aimed to investigate the effects of simulated microgravity (SMG) on the proliferation and morphology of porcine granulosa cells (pGCs). pGC proliferation from the SMG group was inhibited, demonstrated by the reduced O.D. value and cell density in the WST-1 assay and cell number counting. SMG-induced pGCs exhibited an increased ratio of cells in the G0/G1 phase and a decreased ratio of cells in the S and G2/M phase. Western blot analysis indicated a down-regulation of cyclin D1, cyclin-dependent kinase 4 (cdk4), and cyclin-dependent kinase 6 (cdk6), leading to the prevention of the G1-S transition and inducing the arrest phase. pGCs under the SMG condition showed an increase in nuclear area. This caused a reduction in nuclear shape value in pGCs under the SMG condition. SMG-induced pGCs exhibited different morphologies, including fibroblast-like shape, rhomboid shape, and pebble-like shape. These results revealed that SMG inhibited proliferation and induced morphological changes in pGCs.
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Shen KF, Yang XL, Liu GL, Zhu G, Wang ZK, Shi XJ, Wang TT, Wu ZF, Lv SQ, Liu SY, Yang H, Zhang CQ. The role of voltage-gated chloride channels in the epileptogenesis of temporal lobe epilepsy. EBioMedicine 2021; 70:103537. [PMID: 34391093 PMCID: PMC8365373 DOI: 10.1016/j.ebiom.2021.103537] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/18/2021] [Accepted: 07/29/2021] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Temporal lobe epilepsy (TLE) is the most common intractable epilepsy in adults, and elucidation of the underlying pathological mechanisms is needed. Voltage-gated chloride channels (ClC) play diverse physiological roles in neurons. However, less is known regarding their functions in the epilepogenesis of TLE. METHODS ClC-mediated current and the spontaneous inhibitory synaptic currents (sIPSC) in hippocampal neurons of epileptic lesions were investigated by electrophysiological recording. The EEG data were analyzed by Z-scored wavelet and Fourier transformations. The expression of ClC-3, a member of ClC gene family, was detected by immunostaining and western blot. FINDINGS ClC-mediated current was increased in the hippocampal neurons of chronic TLE mice. Application of chloride channel blockers, NPPB (5-Nitro-2- [3-phenylpropylamino] benzoic acid) and DIDS (4,4'-Diisothiocyanato-2,2'-stilbenedisulfonic acid disodium salt) reduced ClC-mediated current and increased inhibitory synaptic transmission in TLE mice. NPPB and DIDS reduced the seizure frequency and the average absolute power of ictal high-frequency oscillations (HFOs, 80-500 Hz) in TLE mice. In addition, both drugs induced outwardly rectified currents, which might be tonic inhibitory currents in the hippocampal neurons of TLE patients. Furthermore, the expression of ClC-3 was increased in the hippocampus of TLE mice and patients and positively correlated with both the absolute power and number of ictal HFOs per seizure in the sclerotic hippocampus. INTERPRETATION These data suggest that ClC participate in the epilepogenetic process of TLE and the inhibition of ClC may have anti-epileptic effect. FUNDING This work was supported by National Natural Science Foundation of China (No. 81601143, No. 81771217).
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Affiliation(s)
- Kai-Feng Shen
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Xiao-Lin Yang
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Guo-Long Liu
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Gang Zhu
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Zhong-Ke Wang
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Xian-Jun Shi
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Ting-Ting Wang
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Zhi-Feng Wu
- Department of Pediatrics, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Sheng-Qing Lv
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Shi-Yong Liu
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Hui Yang
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China
| | - Chun-Qing Zhang
- Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 2-V Xinqiao Street, Chongqing 400037, China.
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Gubič Š, Hendrickx LA, Toplak Ž, Sterle M, Peigneur S, Tomašič T, Pardo LA, Tytgat J, Zega A, Mašič LP. Discovery of K V 1.3 ion channel inhibitors: Medicinal chemistry approaches and challenges. Med Res Rev 2021; 41:2423-2473. [PMID: 33932253 PMCID: PMC8252768 DOI: 10.1002/med.21800] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/03/2021] [Accepted: 03/19/2021] [Indexed: 12/12/2022]
Abstract
The KV 1.3 voltage-gated potassium ion channel is involved in many physiological processes both at the plasma membrane and in the mitochondria, chiefly in the immune and nervous systems. Therapeutic targeting KV 1.3 with specific peptides and small molecule inhibitors shows great potential for treating cancers and autoimmune diseases, such as multiple sclerosis, type I diabetes mellitus, psoriasis, contact dermatitis, rheumatoid arthritis, and myasthenia gravis. However, no KV 1.3-targeted compounds have been approved for therapeutic use to date. This review focuses on the presentation of approaches for discovering new KV 1.3 peptide and small-molecule inhibitors, and strategies to improve the selectivity of active compounds toward KV 1.3. Selectivity of dalatazide (ShK-186), a synthetic derivate of the sea anemone toxin ShK, was achieved by chemical modification and has successfully reached clinical trials as a potential therapeutic for treating autoimmune diseases. Other peptides and small-molecule inhibitors are critically evaluated for their lead-like characteristics and potential for progression into clinical development. Some small-molecule inhibitors with well-defined structure-activity relationships have been optimized for selective delivery to mitochondria, and these offer therapeutic potential for the treatment of cancers. This overview of KV 1.3 inhibitors and methodologies is designed to provide a good starting point for drug discovery to identify novel effective KV 1.3 modulators against this target in the future.
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Affiliation(s)
- Špela Gubič
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Louise A. Hendrickx
- Toxicology and PharmacologyUniversity of Leuven, Campus GasthuisbergLeuvenBelgium
| | - Žan Toplak
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Maša Sterle
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | - Steve Peigneur
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
| | | | - Luis A. Pardo
- AG OncophysiologyMax‐Planck Institute for Experimental MedicineGöttingenGermany
| | - Jan Tytgat
- Toxicology and PharmacologyUniversity of Leuven, Campus GasthuisbergLeuvenBelgium
| | - Anamarija Zega
- Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia
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Toplak Ž, Hendrickx LA, Abdelaziz R, Shi X, Peigneur S, Tomašič T, Tytgat J, Peterlin-Mašič L, Pardo LA. Overcoming challenges of HERG potassium channel liability through rational design: Eag1 inhibitors for cancer treatment. Med Res Rev 2021; 42:183-226. [PMID: 33945158 DOI: 10.1002/med.21808] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/18/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
Two decades of research have proven the relevance of ion channel expression for tumor progression in virtually every indication, and it has become clear that inhibition of specific ion channels will eventually become part of the oncology therapeutic arsenal. However, ion channels play relevant roles in all aspects of physiology, and specificity for the tumor tissue remains a challenge to avoid undesired effects. Eag1 (KV 10.1) is a voltage-gated potassium channel whose expression is very restricted in healthy tissues outside of the brain, while it is overexpressed in 70% of human tumors. Inhibition of Eag1 reduces tumor growth, but the search for potent inhibitors for tumor therapy suffers from the structural similarities with the cardiac HERG channel, a major off-target. Existing inhibitors show low specificity between the two channels, and screenings for Eag1 binders are prone to enrichment in compounds that also bind HERG. Rational drug design requires knowledge of the structure of the target and the understanding of structure-function relationships. Recent studies have shown subtle structural differences between Eag1 and HERG channels with profound functional impact. Thus, although both targets' structure is likely too similar to identify leads that exclusively bind to one of the channels, the structural information combined with the new knowledge of the functional relevance of particular residues or areas suggests the possibility of selective targeting of Eag1 in cancer therapies. Further development of selective Eag1 inhibitors can lead to first-in-class compounds for the treatment of different cancers.
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Affiliation(s)
- Žan Toplak
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Louise A Hendrickx
- Department of Toxicology and Pharmacology, University of Leuven, Leuven, Belgium
| | - Reham Abdelaziz
- AG Oncophysiology, Max-Planck Institute for Experimental Medicine, Göttingen, Germany
| | - Xiaoyi Shi
- AG Oncophysiology, Max-Planck Institute for Experimental Medicine, Göttingen, Germany
| | - Steve Peigneur
- Department of Toxicology and Pharmacology, University of Leuven, Leuven, Belgium
| | - Tihomir Tomašič
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Jan Tytgat
- Department of Toxicology and Pharmacology, University of Leuven, Leuven, Belgium
| | | | - Luis A Pardo
- AG Oncophysiology, Max-Planck Institute for Experimental Medicine, Göttingen, Germany
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12
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Subban P, Kutsher Y, Evenor D, Belausov E, Zemach H, Faigenboim A, Bocobza S, Timko MP, Reuveni M. Shoot Regeneration Is Not a Single Cell Event. PLANTS 2020; 10:plants10010058. [PMID: 33383798 PMCID: PMC7823732 DOI: 10.3390/plants10010058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/20/2020] [Accepted: 12/24/2020] [Indexed: 11/24/2022]
Abstract
Shoot regeneration is a key tool of modern plant biotechnology. While many researchers use this process empirically, very little is known about the early molecular genetic factors and signaling events that lead to shoot regeneration. Using tobacco as a model system, we found that the inductive events required for shoot regeneration occur in the first 4–5 days following incubation on regeneration medium. Leaf segments placed on regeneration medium did not produce shoots if removed from the medium before four days indicating this time frame is crucial for the induction of shoot regeneration. Leaf segments placed on regeneration medium for longer than five days maintain the capacity to produce shoots when removed from the regeneration medium. Analysis of gene expression during the early days of incubation on regeneration medium revealed many changes occurring with no single expression pattern evident among major gene families previously implicated in developmental processes. For example, expression of Knotted gene family members increased during the induction period, whereas transcription factors from the Wuschel gene family were unaltered during shoot induction. Expression levels of genes involved in cell cycle regulation increased steadily on regeneration medium while expression of NAC genes varied. No obvious possible candidate genes or developmental processes could be identified as a target for the early events (first few days) in the induction of shoot regeneration. On the other hand, observations during the early stages of regeneration pointed out that regeneration does not occur from a single cell but a group of cells. We observed that while cell division starts just as leaf segments are placed on regeneration medium, only a group of cells could become shoot primordia. Still, these primordia are not identifiable during the first days.
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Affiliation(s)
- Patharajan Subban
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Yaarit Kutsher
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Dalia Evenor
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Eduard Belausov
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Hanita Zemach
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Adi Faigenboim
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Samuel Bocobza
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
| | - Michael P. Timko
- Department of Biology, University of Virginia, Charlottesville, VA 22904, USA;
| | - Moshe Reuveni
- Institute of Plant Sciences, ARO Volcani Center, P.O. Box 15159, Rishon LeZion 7528809, Israel; (P.S.); (Y.K.); (D.E.); (E.B.); (H.Z.); (A.F.); (S.B.)
- Correspondence:
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13
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Francisco MA, Wanggou S, Fan JJ, Dong W, Chen X, Momin A, Abeysundara N, Min HK, Chan J, McAdam R, Sia M, Pusong RJ, Liu S, Patel N, Ramaswamy V, Kijima N, Wang LY, Song Y, Kafri R, Taylor MD, Li X, Huang X. Chloride intracellular channel 1 cooperates with potassium channel EAG2 to promote medulloblastoma growth. J Exp Med 2020; 217:133839. [PMID: 32097463 PMCID: PMC7201926 DOI: 10.1084/jem.20190971] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 11/27/2019] [Accepted: 01/16/2020] [Indexed: 01/13/2023] Open
Abstract
Ion channels represent a large class of drug targets, but their role in brain cancer is underexplored. Here, we identify that chloride intracellular channel 1 (CLIC1) is overexpressed in human central nervous system malignancies, including medulloblastoma, a common pediatric brain cancer. While global knockout does not overtly affect mouse development, genetic deletion of CLIC1 suppresses medulloblastoma growth in xenograft and genetically engineered mouse models. Mechanistically, CLIC1 enriches to the plasma membrane during mitosis and cooperates with potassium channel EAG2 at lipid rafts to regulate cell volume homeostasis. CLIC1 deficiency is associated with elevation of cell/nuclear volume ratio, uncoupling between RNA biosynthesis and cell size increase, and activation of the p38 MAPK pathway that suppresses proliferation. Concurrent knockdown of CLIC1/EAG2 and their evolutionarily conserved channels synergistically suppressed the growth of human medulloblastoma cells and Drosophila melanogaster brain tumors, respectively. These findings establish CLIC1 as a molecular dependency in rapidly dividing medulloblastoma cells, provide insights into the mechanism by which CLIC1 regulates tumorigenesis, and reveal that targeting CLIC1 and its functionally cooperative potassium channel is a disease-intervention strategy.
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Affiliation(s)
- Michelle A Francisco
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Siyi Wanggou
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jerry J Fan
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Weifan Dong
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Xin Chen
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ali Momin
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Namal Abeysundara
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Hyun-Kee Min
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Jade Chan
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Rochelle McAdam
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Marian Sia
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ronwell J Pusong
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Shixuan Liu
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Nish Patel
- Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Vijay Ramaswamy
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Noriyuki Kijima
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Lu-Yang Wang
- Program in Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Yuanquan Song
- The Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children's Hospital of Philadelphia, Philadelphia, PA.,Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
| | - Ran Kafri
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Michael D Taylor
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Surgery, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Xuejun Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xi Huang
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
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14
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Griffin M, Khan R, Basu S, Smith S. Ion Channels as Therapeutic Targets in High Grade Gliomas. Cancers (Basel) 2020; 12:cancers12103068. [PMID: 33096667 PMCID: PMC7589494 DOI: 10.3390/cancers12103068] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Glioblastoma multiforme is an aggressive grade IV lethal brain tumour with a median survival of 14 months. Despite surgery to remove the tumour, and subsequent concurrent chemotherapy and radiotherapy, there is little in terms of effective treatment options. Because of this, exploring new treatment avenues is vital. Brain tumours are intrinsically electrically active; expressing unique patterns of ion channels, and this is a characteristic we can exploit. Ion channels are specialised proteins in the cell’s membrane that allow for the passage of positive and negatively charged ions in and out of the cell, controlling membrane potential. Membrane potential is a crucial biophysical signal in normal and cancerous cells. Research has identified that specific classes of ion channels not only move the cell through its cell cycle, thus encouraging growth and proliferation, but may also be essential in the development of brain tumours. Inhibition of sodium, potassium, calcium, and chloride channels has been shown to reduce the capacity of glioblastoma cells to grow and invade. Therefore, we propose that targeting ion channels and repurposing commercially available ion channel inhibitors may hold the key to new therapeutic avenues in high grade gliomas. Abstract Glioblastoma multiforme (GBM) is a lethal brain cancer with an average survival of 14–15 months even with exhaustive treatment. High grade gliomas (HGG) represent the leading cause of CNS cancer-related death in children and adults due to the aggressive nature of the tumour and limited treatment options. The scarcity of treatment available for GBM has opened the field to new modalities such as electrotherapy. Previous studies have identified the clinical benefit of electrotherapy in combination with chemotherapeutics, however the mechanistic action is unclear. Increasing evidence indicates that not only are ion channels key in regulating electrical signaling and membrane potential of excitable cells, they perform a crucial role in the development and neoplastic progression of brain tumours. Unlike other tissue types, neural tissue is intrinsically electrically active and reliant on ion channels and their function. Ion channels are essential in cell cycle control, invasion and migration of cancer cells and therefore present as valuable therapeutic targets. This review aims to discuss the role that ion channels hold in gliomagenesis and whether we can target and exploit these channels to provide new therapeutic targets and whether ion channels hold the mechanistic key to the newfound success of electrotherapies.
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Affiliation(s)
- Michaela Griffin
- Children’s Brain Tumour Research Centre, Biodiscovery Institute, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Raheela Khan
- Division of Medical Sciences and Graduate Entry Medicine, Royal Derby Hospital, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Surajit Basu
- Department of Neurosurgery, Queen’s Medical Centre, Nottingham University Hospitals, Nottingham NG7 2RD, UK;
| | - Stuart Smith
- Children’s Brain Tumour Research Centre, Biodiscovery Institute, University of Nottingham, Nottingham NG7 2RD, UK;
- Correspondence:
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15
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Catacuzzeno L, Sforna L, Esposito V, Limatola C, Franciolini F. Ion Channels in Glioma Malignancy. Rev Physiol Biochem Pharmacol 2020; 181:223-267. [DOI: 10.1007/112_2020_44] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Quynh Chi HN, Nghia Son H, Chinh Chung D, Huan LD, Hong Diem T, Long LT. Simulated microgravity reduces proliferation and reorganizes the cytoskeleton of human umbilical cord mesenchymal stem cells. Physiol Res 2020; 69:897-906. [PMID: 32901501 DOI: 10.33549/physiolres.934472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The cytoskeleton plays a key role in cellular proliferation, cell-shape maintenance and internal cellular organization. Cells are highly sensitive to changes in microgravity, which can induce alterations in the distribution of the cytoskeletal and cell proliferation. This study aimed to assess the effects of simulated microgravity (SMG) on the proliferation and expression of major cell cycle-related regulators and cytoskeletal proteins in human umbilical cord mesenchymal stem cells (hucMSCs). A WST-1 assay showed that the proliferation of SMG-exposed hucMSCs was lower than a control group. Furthermore, flow cytometry analysis demonstrated that the percentage of SMG-exposed hucMSCs in the G0/G1 phase was higher than the control group. A western blot analysis revealed there was a downregulation of cyclin A1 and A2 expression in SMG-exposed hucMSCs as well. The expression of cyclin-dependent kinase 4 (cdk4) and 6 (cdk6) were also observed to be reduced in the SMG-exposed hucMSCs. The total nuclear intensity of SMG-exposed hucMSCs was also lower than the control group. However, there were no differences in the nuclear area or nuclear-shape value of hucMSCs from the SMG and control groups. A western blot and quantitative RT-PCR analysis showed that SMG-exposed hucMSCs experienced a downregulation of bata-actin and alpha-tubulin compared to the control group. SMG generated the reorganization of microtubules and microfilaments in hucMSCs. Our study supports the idea that the downregulation of major cell cycle-related proteins and cytoskeletal proteins results in the remodeling of the cytoskeleton and the proliferation of hucMSCs.
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Affiliation(s)
- H N Quynh Chi
- Animal Biotechnology Department, Institute of Tropical Biology, Ho Chi Minh City, Vietnam.
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17
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Rosendo-Pineda MJ, Moreno CM, Vaca L. Role of ion channels during cell division. Cell Calcium 2020; 91:102258. [PMID: 32736154 DOI: 10.1016/j.ceca.2020.102258] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023]
Abstract
Ion channels are transmembrane proteins whose canonical function is the transport of ions across the plasma membrane to regulate cell membrane potential and play an essential role in neural communication, nerve conduction, and muscle contraction. However, over the last few years, non-canonical functions have been identified for many channels, having active roles in phagocytosis, invasiveness, proliferation, among others. The participation of some channels in cell proliferation has raised the question of whether they may play an active role in mitosis. There are several reports showing the participation of channels during interphase, however, the direct participation of ion channels in mitosis has received less attention. In this article, we summarize the current evidence on the participation of ion channels in mitosis. We also summarize some tools that would allow the study of ion channels and cell cycle regulatory molecules in individual cells during mitosis.
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Affiliation(s)
| | - Claudia M Moreno
- Department of Physiology and Biophysics, University of Washington School of Medicine, Seattle, WA, 98195, USA
| | - Luis Vaca
- Instituto de Fisiología Celular. Universidad Nacional Autónoma de México. Ciudad Universitaria, Coyoacán, DF, 04510, Mexico; Department of Physiology and Biophysics, University of Washington School of Medicine, Seattle, WA, 98195, USA.
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18
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Cucchiara F, Pasqualetti F, Giorgi FS, Danesi R, Bocci G. Epileptogenesis and oncogenesis: An antineoplastic role for antiepileptic drugs in brain tumours? Pharmacol Res 2020; 156:104786. [PMID: 32278037 DOI: 10.1016/j.phrs.2020.104786] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/24/2020] [Accepted: 03/24/2020] [Indexed: 02/07/2023]
Abstract
The first description of epileptic seizures due to brain tumours occurred in 19th century. Nevertheless, after over one hundred years, scientific literature is still lacking on how epilepsy and its treatment can affect tumour burden, progression and clinical outcomes. In patients with brain tumours, epilepsy dramatically impacts their quality of life (QoL). Even antiepileptic therapy seems to affect tumor lesion development. Numerous studies suggest that certain actors involved in epileptogenesis (inflammatory changes, glutamate and its ionotropic and metabotropic receptors, GABA-A and its GABA-AR receptor, as well as certain ligand- and voltage-gated ion channel) may also contribute to tumorigenesis. Although some antiepileptic drugs (AEDs) are known operating on such mechanisms underlying epilepsy and tumor development, few preclinical and clinical studies have tried to investigate them as targets of pharmacological tools acting to control both phenomena. The primary aim of this review is to summarize known determinants and pathophysiological mechanisms of seizures, as well as of cell growth and spread, in patients with brain tumors. Therefore, a special focus will be provided on the anticancer effects of commonly prescribed AEDs (including levetiracetam, valproic acid, oxcarbazepine and others), with an overview of both preclinical and clinical data. Potential clinical applications of this finding are discussed.
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Affiliation(s)
- Federico Cucchiara
- Dipartimento di Medicina Clinica e Sperimentale, Università di Pisa, Pisa, Italy; Scuola di Specializzazione in Farmacologia e Tossicologia Clinica, Università di Pisa, Pisa, Italy
| | - Francesco Pasqualetti
- U.O. Radioterapia, Azienda Ospedaliera Universitaria Pisana, Università di Pisa, Italy
| | - Filippo Sean Giorgi
- U.O. Neurologia, Azienda Ospedaliera Universitaria Pisana, Università di Pisa, Pisa, Italy; Dipartimento di Ricerca Traslazionale e delle Nuove Tecnologie in Medicina e Chirurgia, Università di Pisa, Pisa, Italy
| | - Romano Danesi
- Dipartimento di Medicina Clinica e Sperimentale, Università di Pisa, Pisa, Italy; Scuola di Specializzazione in Farmacologia e Tossicologia Clinica, Università di Pisa, Pisa, Italy
| | - Guido Bocci
- Dipartimento di Medicina Clinica e Sperimentale, Università di Pisa, Pisa, Italy; Scuola di Specializzazione in Farmacologia e Tossicologia Clinica, Università di Pisa, Pisa, Italy.
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19
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Sandoz PA, Tremblay C, van der Goot FG, Frechin M. Image-based analysis of living mammalian cells using label-free 3D refractive index maps reveals new organelle dynamics and dry mass flux. PLoS Biol 2019; 17:e3000553. [PMID: 31856161 PMCID: PMC6922317 DOI: 10.1371/journal.pbio.3000553] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 11/15/2019] [Indexed: 12/22/2022] Open
Abstract
Holo-tomographic microscopy (HTM) is a label-free microscopy method reporting the fine changes of a cell's refractive indices (RIs) in three dimensions at high spatial and temporal resolution. By combining HTM with epifluorescence, we demonstrate that mammalian cellular organelles such as lipid droplets (LDs) and mitochondria show specific RI 3D patterns. To go further, we developed a computer-vision strategy using FIJI, CellProfiler3 (CP3), and custom code that allows us to use the fine images obtained by HTM in quantitative approaches. We could observe the shape and dry mass dynamics of LDs, endocytic structures, and entire cells' division that have so far, to the best of our knowledge, been out of reach. We finally took advantage of the capacity of HTM to capture the motion of many organelles at the same time to report a multiorganelle spinning phenomenon and study its dynamic properties using pattern matching and homography analysis. This work demonstrates that HTM gives access to an uncharted field of biological dynamics and describes a unique set of simple computer-vision strategies that can be broadly used to quantify HTM images.
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Affiliation(s)
- Patrick A. Sandoz
- Global Health Institute, Life Sciences Faculty, EPFL, Lausanne, Switzerland
| | - Christopher Tremblay
- Global Health Institute, Life Sciences Faculty, EPFL, Lausanne, Switzerland
- Nanolive SA, EPFL Innovation Park, Ecublens, Switzerland
| | - F. Gisou van der Goot
- Global Health Institute, Life Sciences Faculty, EPFL, Lausanne, Switzerland
- * E-mail: (GvdG); (MF)
| | - Mathieu Frechin
- Nanolive SA, EPFL Innovation Park, Ecublens, Switzerland
- * E-mail: (GvdG); (MF)
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20
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The Volume-Regulated Anion Channel LRRC8/VRAC Is Dispensable for Cell Proliferation and Migration. Int J Mol Sci 2019; 20:ijms20112663. [PMID: 31151189 PMCID: PMC6600467 DOI: 10.3390/ijms20112663] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/20/2019] [Accepted: 05/29/2019] [Indexed: 02/06/2023] Open
Abstract
Cells possess the capability to adjust their volume for various physiological processes, presumably including cell proliferation and migration. The volume-regulated anion channel (VRAC), formed by LRRC8 heteromers, is critically involved in regulatory volume decrease of vertebrate cells. The VRAC has also been proposed to play a role in cell cycle progression and cellular motility. Indeed, recent reports corroborated this notion, with potentially important implications for the VRAC in cancer progression. In the present study, we examined the role of VRAC during cell proliferation and migration in several cell types, including C2C12 myoblasts, human colon cancer HCT116 cells, and U251 and U87 glioblastoma cells. Surprisingly, neither pharmacological inhibition of VRAC with 4-[(2-Butyl-6,7-dichloro-2-cyclopentyl-2,3-dihydro-1-oxo-1H-inden-5-yl)oxy]butanoic acid (DCPIB), carbenoxolone or 5-nitro-2-(3-phenylpropyl-amino)benzoic acid (NPPB), nor siRNA-mediated knockdown or gene knockout of the essential VRAC subunit LRRC8A affected cell growth and motility in any of the investigated cell lines. Additionally, we found no effect of the VRAC inhibition using siRNA treatment or DCPIB on PI3K/Akt signaling in glioblastoma cells. In summary, our work suggests that VRAC is dispensable for cell proliferation or migration.
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21
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Prevarskaya N, Skryma R, Shuba Y. Ion Channels in Cancer: Are Cancer Hallmarks Oncochannelopathies? Physiol Rev 2018; 98:559-621. [PMID: 29412049 DOI: 10.1152/physrev.00044.2016] [Citation(s) in RCA: 277] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Genomic instability is a primary cause and fundamental feature of human cancer. However, all cancer cell genotypes generally translate into several common pathophysiological features, often referred to as cancer hallmarks. Although nowadays the catalog of cancer hallmarks is quite broad, the most common and obvious of them are 1) uncontrolled proliferation, 2) resistance to programmed cell death (apoptosis), 3) tissue invasion and metastasis, and 4) sustained angiogenesis. Among the genes affected by cancer, those encoding ion channels are present. Membrane proteins responsible for signaling within cell and among cells, for coupling of extracellular events with intracellular responses, and for maintaining intracellular ionic homeostasis ion channels contribute to various extents to pathophysiological features of each cancer hallmark. Moreover, tight association of these hallmarks with ion channel dysfunction gives a good reason to classify them as special type of channelopathies, namely oncochannelopathies. Although the relation of cancer hallmarks to ion channel dysfunction differs from classical definition of channelopathies, as disease states causally linked with inherited mutations of ion channel genes that alter channel's biophysical properties, in a broader context of the disease state, to which pathogenesis ion channels essentially contribute, such classification seems absolutely appropriate. In this review the authors provide arguments to substantiate such point of view.
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Affiliation(s)
- Natalia Prevarskaya
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
| | - Roman Skryma
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
| | - Yaroslav Shuba
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
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Sevcik C. Caveat on the Boltzmann distribution function use in biology. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2017; 127:33-42. [PMID: 28412397 DOI: 10.1016/j.pbiomolbio.2017.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 03/28/2017] [Accepted: 04/04/2017] [Indexed: 01/05/2023]
Abstract
Sigmoid semilogarithmic functions with shape of Boltzmann equations, have become extremely popular to describe diverse biological situations. Part of the popularity is due to the easy availability of software which fits Boltzmann functions to data, without much knowledge of the fitting procedure or the statistical properties of the parameters derived from the procedure. The purpose of this paper is to explore the plasticity of the Boltzmann function to fit data, some aspects of the optimization procedure to fit the function to data and how to use this plastic function to differentiate the effect of treatment on data and to attest the statistical significance of treatment effect on the data.
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Affiliation(s)
- Carlos Sevcik
- Laboratory on Cellular Neuropharmacology, Centro de Biofísica y Bioquímica, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas, Venezuela.
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23
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Yeh YT, Harouaka RA, Zheng SY. Evaluating a novel dimensional reduction approach for mechanical fractionation of cells using a tandem flexible micro spring array (tFMSA). LAB ON A CHIP 2017; 17:691-701. [PMID: 28144670 DOI: 10.1039/c6lc01527a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present a novel methodology to establish experimental models for the rational design of cell fractionation based on physical properties of cells. Label-free microfluidic separation of cells based on size is a widely employed technique. However, close observation reveals that cell capture results cannot be explained by cell sizes alone. This is particularly apparent with viable cell fractionation, where cells retain their native deformability. We have developed a principal size cutoff (PSC) model based on the analysis of size distribution and size-based filtration efficiency for cell populations. The goal of this analysis is to use an unbiased approach to achieve dimensional reduction of deformability and other mechanical properties that affect cell capture. The PSC model provides a single calibrated principal size component that may be compared directly to device gap width, which is the critical dimension for cell filtration. The PSC model was evaluated experimentally using a tandem flexible micro spring array (tFMSA) device made of parylene filtration elements applied within micro-molded polydimethylsiloxane (PDMS) chambers. In the tFMSA device, a mixture of cells is sequentially passed through individual filters with decreasing gap widths to allow size-based selection. We applied this method to demonstrate viable separation of subgroups of cells with different mechanical properties from complex mixtures, including fractionation according to cancer cell type, cell cycle stage, cell viability status, and leukocyte nuclear phenotype. The PSC methodology and tFMSA device can advance a better understanding of complex factors affecting mechanical cell fractionation and provide a miniature platform for obtaining rationally designed cell fractions for biomedical applications.
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Affiliation(s)
- Yin-Ting Yeh
- Department of Biomedical Engineering, Materials Research Institute and Huck Life Science Institute, The Pennsylvania State University, N-238 Millennium Science Complex, University Park, PA 16802, USA.
| | - Ramdane A Harouaka
- Department of Biomedical Engineering, Materials Research Institute and Huck Life Science Institute, The Pennsylvania State University, N-238 Millennium Science Complex, University Park, PA 16802, USA.
| | - Si-Yang Zheng
- Department of Biomedical Engineering, Materials Research Institute and Huck Life Science Institute, The Pennsylvania State University, N-238 Millennium Science Complex, University Park, PA 16802, USA. and Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA and Penn State Hershey Cancer Institute, Hershey, PA 17033, USA
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Tuszynski JA, Wenger C, Friesen DE, Preto J. An Overview of Sub-Cellular Mechanisms Involved in the Action of TTFields. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:E1128. [PMID: 27845746 PMCID: PMC5129338 DOI: 10.3390/ijerph13111128] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 10/23/2016] [Accepted: 11/07/2016] [Indexed: 12/13/2022]
Abstract
Long-standing research on electric and electromagnetic field interactions with biological cells and their subcellular structures has mainly focused on the low- and high-frequency regimes. Biological effects at intermediate frequencies between 100 and 300 kHz have been recently discovered and applied to cancer cells as a therapeutic modality called Tumor Treating Fields (TTFields). TTFields are clinically applied to disrupt cell division, primarily for the treatment of glioblastoma multiforme (GBM). In this review, we provide an assessment of possible physical interactions between 100 kHz range alternating electric fields and biological cells in general and their nano-scale subcellular structures in particular. This is intended to mechanistically elucidate the observed strong disruptive effects in cancer cells. Computational models of isolated cells subject to TTFields predict that for intermediate frequencies the intracellular electric field strength significantly increases and that peak dielectrophoretic forces develop in dividing cells. These findings are in agreement with in vitro observations of TTFields' disruptive effects on cellular function. We conclude that the most likely candidates to provide a quantitative explanation of these effects are ionic condensation waves around microtubules as well as dielectrophoretic effects on the dipole moments of microtubules. A less likely possibility is the involvement of actin filaments or ion channels.
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Affiliation(s)
- Jack A Tuszynski
- Department of Oncology, University of Alberta, Edmonton, AB T6G 1Z2, Canada.
- Department of Physics, University of Alberta, Edmonton, AB T6G 2E1, Canada.
| | - Cornelia Wenger
- The Institute of Biophysics and Biomedical Engineering, Faculdade de Ciências, Universidade de Lisboa, Lisboa 1749-016, Portugal.
| | - Douglas E Friesen
- Department of Oncology, University of Alberta, Edmonton, AB T6G 1Z2, Canada.
| | - Jordane Preto
- Department of Oncology, University of Alberta, Edmonton, AB T6G 1Z2, Canada.
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26
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Wenger C, Giladi M, Bomzon Z, Salvador R, Basser PJ, Miranda PC. Modeling Tumor Treating Fields (TTFields) application in single cells during metaphase and telophase. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:6892-5. [PMID: 26737877 DOI: 10.1109/embc.2015.7319977] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Effects of electric fields on biological cells have been extensively studied but primarily in the low and high frequency regimes. Low frequency AC fields have been investigated for applications to nerve and muscle stimulation or to examine possible environmental effects of 60 Hz excitation. High frequency fields have been studied to understand tissue heating and tumor ablation. Biological effects at intermediate frequencies (in the 100-500 kHz regime) have only recently been discovered and are now being used clinically to disrupt cell division, primarily for the treatment of recurrent glioblastoma multiforme. In this study, we develop a computational framework to investigate the mechanisms of action of these Tumor Treating Fields (TTFields) and to understand in vitro findings observed in cell culture. Using Finite Element Method models of isolated cells we show that the intermediate frequency range is unique because it constitutes a transition region in which the intracellular electric field, shielded at low frequencies, increases significantly. We also show that the threshold at which this increase occurs depends on the dielectric properties of the cell membrane. Furthermore, our models of different stages of the cell cycle and of the morphological changes associated with cytokinesis show that peak dielectrophoretic forces develop within dividing cells exposed to TTFields. These findings are in agreement with in vitro observations, and enhance our understanding of how TTFields disrupt cellular function.
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27
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Fykerud TA, Knudsen LM, Totland MZ, Sørensen V, Dahal-Koirala S, Lothe RA, Brech A, Leithe E. Mitotic cells form actin-based bridges with adjacent cells to provide intercellular communication during rounding. Cell Cycle 2016; 15:2943-2957. [PMID: 27625181 PMCID: PMC5105929 DOI: 10.1080/15384101.2016.1231280] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
In order to achieve accurate chromosome segregation, eukaryotic cells undergo a dramatic change in morphology to obtain a spherical shape during mitosis. Interphase cells communicate directly with each other by exchanging ions and small molecules via gap junctions, which have important roles in controlling cell growth and differentiation. As cells round up during mitosis, the gap junctional communication between mitotic cells and adjacent interphase cells ceases. Whether mitotic cells use alternative mechanisms for mediating direct cell-cell communication during rounding is currently unknown. Here, we have studied the mechanisms involved in the remodeling of gap junctions during mitosis. We further demonstrate that mitotic cells are able to form actin-based plasma membrane bridges with adjacent cells during rounding. These structures, termed “mitotic nanotubes,” were found to be involved in mediating the transport of cytoplasm, including Rab11-positive vesicles, between mitotic cells and adjacent cells. Moreover, a subpool of the gap-junction channel protein connexin43 localized in these intercellular bridges during mitosis. Collectively, the data provide new insights into the mechanisms involved in the remodeling of gap junctions during mitosis and identify actin-based plasma membrane bridges as a novel means of communication between mitotic cells and adjacent cells during rounding.
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Affiliation(s)
- Tone A Fykerud
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway.,d K.G. Jebsen Colorectal Cancer Research Center, Oslo University Hospital , Oslo , Norway
| | - Lars M Knudsen
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway.,d K.G. Jebsen Colorectal Cancer Research Center, Oslo University Hospital , Oslo , Norway
| | - Max Z Totland
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway.,d K.G. Jebsen Colorectal Cancer Research Center, Oslo University Hospital , Oslo , Norway
| | - Vigdis Sørensen
- b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,e Department of Molecular Cell Biology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,f Department of Core Facilities , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway
| | - Shiva Dahal-Koirala
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway
| | - Ragnhild A Lothe
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway.,d K.G. Jebsen Colorectal Cancer Research Center, Oslo University Hospital , Oslo , Norway
| | - Andreas Brech
- b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,c Institute for Biosciences, University of Oslo , Oslo , Norway.,e Department of Molecular Cell Biology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,f Department of Core Facilities , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway
| | - Edward Leithe
- a Department of Molecular Oncology , Institute for Cancer Research, Oslo University Hospital , Oslo , Norway.,b Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo , Oslo , Norway.,d K.G. Jebsen Colorectal Cancer Research Center, Oslo University Hospital , Oslo , Norway
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28
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Aguet F, Upadhyayula S, Gaudin R, Chou YY, Cocucci E, He K, Chen BC, Mosaliganti K, Pasham M, Skillern W, Legant WR, Liu TL, Findlay G, Marino E, Danuser G, Megason S, Betzig E, Kirchhausen T. Membrane dynamics of dividing cells imaged by lattice light-sheet microscopy. Mol Biol Cell 2016; 27:3418-3435. [PMID: 27535432 PMCID: PMC5221578 DOI: 10.1091/mbc.e16-03-0164] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 08/03/2016] [Indexed: 12/02/2022] Open
Abstract
Lattice light-sheet microscopy is used to examine two problems in membrane dynamics—molecular events in clathrin-coated pit formation and changes in cell shape during cell division. This methodology sets a new standard for imaging membrane dynamics in single cells and multicellular assemblies. Membrane remodeling is an essential part of transferring components to and from the cell surface and membrane-bound organelles and for changes in cell shape, which are particularly critical during cell division. Earlier analyses, based on classical optical live-cell imaging and mostly restricted by technical necessity to the attached bottom surface, showed persistent formation of endocytic clathrin pits and vesicles during mitosis. Taking advantage of the resolution, speed, and noninvasive illumination of the newly developed lattice light-sheet fluorescence microscope, we reexamined their assembly dynamics over the entire cell surface and found that clathrin pits form at a lower rate during late mitosis. Full-cell imaging measurements of cell surface area and volume throughout the cell cycle of single cells in culture and in zebrafish embryos showed that the total surface increased rapidly during the transition from telophase to cytokinesis, whereas cell volume increased slightly in metaphase and was relatively constant during cytokinesis. These applications demonstrate the advantage of lattice light-sheet microscopy and enable a new standard for imaging membrane dynamics in single cells and multicellular assemblies.
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Affiliation(s)
- François Aguet
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115
| | - Srigokul Upadhyayula
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Raphaël Gaudin
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Yi-Ying Chou
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Emanuele Cocucci
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Kangmin He
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Bi-Chang Chen
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147
| | | | - Mithun Pasham
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Wesley Skillern
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Wesley R Legant
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147
| | - Tsung-Li Liu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147
| | - Greg Findlay
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Eric Marino
- Department of Cell Biology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
| | - Gaudenz Danuser
- Lyda Hill Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX 75390
| | - Sean Megason
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Eric Betzig
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147
| | - Tom Kirchhausen
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115 .,Departments of Cell Biology and Pediatrics, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115
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29
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Cong D, Zhu W, Kuo JS, Hu S, Sun D. Ion transporters in brain tumors. Curr Med Chem 2016; 22:1171-81. [PMID: 25620102 DOI: 10.2174/0929867322666150114151946] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 01/05/2015] [Accepted: 01/08/2015] [Indexed: 11/22/2022]
Abstract
Ion transporters are important in regulation of ionic homeostasis, cell volume, and cellular signal transduction under physiological conditions. They have recently emerged as important players in cancer progression. In this review, we discussed two important ion transporter proteins, sodium-potassium-chloride cotransporter isoform 1 (NKCC-1) and sodium-hydrogen exchanger isoform 1 (NHE-1) in Glioblastoma multiforme (GBM) and other malignant tumors. NKCC-1 is a Na(+)- dependent Cl(-) transporter that mediates the movement of Na(+), K(+), and Cl(-) ions across the plasma membrane and maintains cell volume and intracellular K(+) and Cl(-) homeostasis. NHE-1 is a ubiquitously expressed cell membrane protein which regulates intracellular pH (pH(i)) and extracellular pH (pH(e)) homeostasis and cell volume. Here, we summarized recent pre-clinical experimental studies on NKCC-1 and NHE-1 in GBM and other malignant tumors, such as breast cancer, hepatocellular carcinoma, and lung cancer cells. These studies illustrated that pharmacological inhibition or down-regulation of these ion transporter proteins reduces proliferation, increases apoptosis, and suppresses migration and invasion of cancer cells. These new findings reveal the potentials of these ion transporters as new targets for cancer diagnosis and/or treatment.
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Affiliation(s)
| | | | | | | | - Dandan Sun
- Department of Neurology, University of Pittsburgh Medical School, S-598 South Biomedical Science Tower (BST), 3500 Terrace St., Pittsburgh, PA 15213, USA.
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30
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Son S, Kang JH, Oh S, Kirschner MW, Mitchison TJ, Manalis S. Resonant microchannel volume and mass measurements show that suspended cells swell during mitosis. J Cell Biol 2016; 211:757-63. [PMID: 26598613 PMCID: PMC4657169 DOI: 10.1083/jcb.201505058] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Suspended cells transiently increase their volume during mitosis because of ion exchange through the plasma membrane. Osmotic regulation of intracellular water during mitosis is poorly understood because methods for monitoring relevant cellular physical properties with sufficient precision have been limited. Here we use a suspended microchannel resonator to monitor the volume and density of single cells in suspension with a precision of 1% and 0.03%, respectively. We find that for transformed murine lymphocytic leukemia and mouse pro–B cell lymphoid cell lines, mitotic cells reversibly increase their volume by more than 10% and decrease their density by 0.4% over a 20-min period. This response is correlated with the mitotic cell cycle but is not coupled to nuclear osmolytes released by nuclear envelope breakdown, chromatin condensation, or cytokinesis and does not result from endocytosis of the surrounding fluid. Inhibiting Na-H exchange eliminates the response. Although mitotic rounding of adherent cells is necessary for proper cell division, our observations that suspended cells undergo reversible swelling during mitosis suggest that regulation of intracellular water may be a more general component of mitosis than previously appreciated.
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Affiliation(s)
- Sungmin Son
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02142 Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Joon Ho Kang
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02142 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Seungeun Oh
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Marc W Kirschner
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - T J Mitchison
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Scott Manalis
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02142 Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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31
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Zlotek-Zlotkiewicz E, Monnier S, Cappello G, Le Berre M, Piel M. Optical volume and mass measurements show that mammalian cells swell during mitosis. J Cell Biol 2016; 211:765-74. [PMID: 26598614 PMCID: PMC4657168 DOI: 10.1083/jcb.201505056] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The extent, mechanism, and function of cell volume changes during specific cellular events, such as cell migration and cell division, have been poorly studied, mostly because of a lack of adequate techniques. Here we unambiguously report that a large range of mammalian cell types display a significant increase in volume during mitosis (up to 30%). We further show that this increase in volume is tightly linked to the mitotic state of the cell and not to its spread or rounded shape and is independent of the presence of an intact actomyosin cortex. Importantly, this volume increase is not accompanied by an increase in dry mass and thus corresponds to a decrease in cell density. This mitotic swelling might have important consequences for mitotic progression: it might contribute to produce strong pushing forces, allowing mitotic cells to round up; it might also, by lowering cytoplasmic density, contribute to the large change of physicochemical properties observed in mitotic cells.
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Affiliation(s)
| | - Sylvain Monnier
- UMR 144, Institut Curie, Centre de Recherche, 75005 Paris, France UMR 168, Institut Curie, Centre de Recherche, 75005 Paris, France
| | | | - Mael Le Berre
- UMR 144, Institut Curie, Centre de Recherche, 75005 Paris, France
| | - Matthieu Piel
- UMR 144, Institut Curie, Centre de Recherche, 75005 Paris, France
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32
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Fernández-Valle Á, Rodrigo JP, García-Pedrero JM, Rodríguez-Santamarta T, Allonca E, Lequerica-Fernández P, de Vicente JC. Expression of the voltage-gated potassium channel Kv3.4 in oral leucoplakias and oral squamous cell carcinomas. Histopathology 2016; 69:91-8. [DOI: 10.1111/his.12917] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 12/05/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Álvaro Fernández-Valle
- Department of Oral and Maxillofacial Surgery; Hospital Universitario Central de Asturias (HUCA); Oviedo Asturias Spain
| | - Juan Pablo Rodrigo
- Department of Otolaryngology; Hospital Universitario Central de Asturias (HUCA); Oviedo Asturias Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA); University of Oviedo; Oviedo Asturias Spain
| | - Juana M García-Pedrero
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA); University of Oviedo; Oviedo Asturias Spain
| | - Tania Rodríguez-Santamarta
- Department of Oral and Maxillofacial Surgery; Hospital Universitario Central de Asturias (HUCA); Oviedo Asturias Spain
| | - Eva Allonca
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA); University of Oviedo; Oviedo Asturias Spain
| | | | - Juan Carlos de Vicente
- Department of Oral and Maxillofacial Surgery; Hospital Universitario Central de Asturias (HUCA); Oviedo Asturias Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA); University of Oviedo; Oviedo Asturias Spain
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33
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Leclerc C, Haeich J, Aulestia FJ, Kilhoffer MC, Miller AL, Néant I, Webb SE, Schaeffer E, Junier MP, Chneiweiss H, Moreau M. Calcium signaling orchestrates glioblastoma development: Facts and conjunctures. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1863:1447-59. [PMID: 26826650 DOI: 10.1016/j.bbamcr.2016.01.018] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/18/2016] [Accepted: 01/22/2016] [Indexed: 01/06/2023]
Abstract
While it is a relatively rare disease, glioblastoma multiform (GBM) is one of the more deadly adult cancers. Following current interventions, the tumor is never eliminated whatever the treatment performed; whether it is radiotherapy, chemotherapy, or surgery. One hypothesis to explain this poor outcome is the "cancer stem cell" hypothesis. This concept proposes that a minority of cells within the tumor mass share many of the properties of adult neural stem cells and it is these that are responsible for the growth of the tumor and its resistance to existing therapies. Accumulating evidence suggests that Ca(2+) might also be an important positive regulator of tumorigenesis in GBM, in processes involving quiescence, maintenance, proliferation, or migration. Glioblastoma tumors are generally thought to develop by co-opting pathways that are involved in the formation of an organ. We propose that the cells initiating the tumor, and subsequently the cells of the tumor mass, must hijack the different checkpoints that evolution has selected in order to prevent the pathological development of an organ. In this article, two main points are discussed. (i) The first is the establishment of a so-called "cellular society," which is required to create a favorable microenvironment. (ii) The second is that GBM can be considered to be an organism, which fights to survive and develop. Since GBM evolves in a limited space, its only chance of development is to overcome the evolutionary checkpoints. For example, the deregulation of the normal Ca(2+) signaling elements contributes to the progression of the disease. Thus, by manipulating the Ca(2+) signaling, the GBM cells might not be killed, but might be reprogrammed toward a new fate that is either easy to cure or that has no aberrant functioning. This article is part of a Special Issue entitled: Calcium and Cell Fate. Guest Editors: Jacques Haiech, Claus Heizmann, Joachim Krebs, Thierry Capiod and Olivier Mignen.
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Affiliation(s)
- Catherine Leclerc
- Centre de Biologie du Développement, Université Toulouse 3, 118 route de Narbonne, F31062 Toulouse, Cedex 04, France; CNRS UMR5547, Toulouse F31062, France.
| | - Jacques Haeich
- Laboratoire d'Innovation Thérapeutique, Laboratoire d'Excellence Médalis, UMR 7200 Université de Strasbourg / CNRS, 67412 Illkirch, France
| | - Francisco J Aulestia
- Centre de Biologie du Développement, Université Toulouse 3, 118 route de Narbonne, F31062 Toulouse, Cedex 04, France
| | - Marie-Claude Kilhoffer
- Laboratoire d'Innovation Thérapeutique, Laboratoire d'Excellence Médalis, UMR 7200 Université de Strasbourg / CNRS, 67412 Illkirch, France
| | - Andrew L Miller
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PR China
| | - Isabelle Néant
- Centre de Biologie du Développement, Université Toulouse 3, 118 route de Narbonne, F31062 Toulouse, Cedex 04, France; CNRS UMR5547, Toulouse F31062, France
| | - Sarah E Webb
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PR China
| | - Etienne Schaeffer
- IREBS UMR7242 ESBS, Pôle API, Parc d'Innovation d'Illkirch, 67412 Illkirch cedex, France
| | - Marie-Pierre Junier
- Sorbonne Universités, UPMC Univ Paris 06, Centre National de la Recherche Scientifique (CNRS), UMR8246, Institut National de la Santé et de la Recherche Medicale (INSERM), U1130, Institut de Biologie Paris Seine (IBPS), Neuroscience Paris Seine (NPS), Team Glial Plasticity, 7/9 Quai St Bernard, Paris, France
| | - Hervé Chneiweiss
- Sorbonne Universités, UPMC Univ Paris 06, Centre National de la Recherche Scientifique (CNRS), UMR8246, Institut National de la Santé et de la Recherche Medicale (INSERM), U1130, Institut de Biologie Paris Seine (IBPS), Neuroscience Paris Seine (NPS), Team Glial Plasticity, 7/9 Quai St Bernard, Paris, France
| | - Marc Moreau
- Centre de Biologie du Développement, Université Toulouse 3, 118 route de Narbonne, F31062 Toulouse, Cedex 04, France; CNRS UMR5547, Toulouse F31062, France
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Pedersen SF, Okada Y, Nilius B. Biophysics and Physiology of the Volume-Regulated Anion Channel (VRAC)/Volume-Sensitive Outwardly Rectifying Anion Channel (VSOR). Pflugers Arch 2016; 468:371-83. [DOI: 10.1007/s00424-015-1781-6] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 12/19/2015] [Accepted: 12/21/2015] [Indexed: 01/25/2023]
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Hoffmann EK, Sørensen BH, Sauter DPR, Lambert IH. Role of volume-regulated and calcium-activated anion channels in cell volume homeostasis, cancer and drug resistance. Channels (Austin) 2015; 9:380-96. [PMID: 26569161 DOI: 10.1080/19336950.2015.1089007] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Volume-regulated channels for anions (VRAC) / organic osmolytes (VSOAC) play essential roles in cell volume regulation and other cellular functions, e.g. proliferation, cell migration and apoptosis. LRRC8A, which belongs to the leucine rich-repeat containing protein family, was recently shown to be an essential component of both VRAC and VSOAC. Reduced VRAC and VSOAC activities are seen in drug resistant cancer cells. ANO1 is a calcium-activated chloride channel expressed on the plasma membrane of e.g., secretory epithelia. ANO1 is amplified and highly expressed in a large number of carcinomas. The gene, encoding for ANO1, maps to a region on chromosome 11 (11q13) that is frequently amplified in cancer cells. Knockdown of ANO1 impairs cell proliferation and cell migration in several cancer cells. Below we summarize the basic biophysical properties of VRAC, VSOAC and ANO1 and their most important cellular functions as well as their role in cancer and drug resistance.
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Affiliation(s)
- Else K Hoffmann
- a Department of Biology ; Section for Cell Biology and Physiology; University of Copenhagen ; Copenhagen , Denmark
| | - Belinda H Sørensen
- a Department of Biology ; Section for Cell Biology and Physiology; University of Copenhagen ; Copenhagen , Denmark
| | - Daniel P R Sauter
- a Department of Biology ; Section for Cell Biology and Physiology; University of Copenhagen ; Copenhagen , Denmark
| | - Ian H Lambert
- a Department of Biology ; Section for Cell Biology and Physiology; University of Copenhagen ; Copenhagen , Denmark
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36
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EAG2 potassium channel with evolutionarily conserved function as a brain tumor target. Nat Neurosci 2015; 18:1236-46. [PMID: 26258683 DOI: 10.1038/nn.4088] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 07/15/2015] [Indexed: 12/15/2022]
Abstract
Over 20% of the drugs for treating human diseases target ion channels, but no cancer drug approved by the US Food and Drug Administration (FDA) is intended to target an ion channel. We found that the EAG2 (Ether-a-go-go 2) potassium channel has an evolutionarily conserved function for promoting brain tumor growth and metastasis, delineate downstream pathways, and uncover a mechanism for different potassium channels to functionally cooperate and regulate mitotic cell volume and tumor progression. EAG2 potassium channel was enriched at the trailing edge of migrating medulloblastoma (MB) cells to regulate local cell volume dynamics, thereby facilitating cell motility. We identified the FDA-approved antipsychotic drug thioridazine as an EAG2 channel blocker that reduces xenografted MB growth and metastasis, and present a case report of repurposing thioridazine for treating a human patient. Our findings illustrate the potential of targeting ion channels in cancer treatment.
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Evidence for P-Glycoprotein Involvement in Cell Volume Regulation Using Coulter Sizing in Flow Cytometry. Int J Mol Sci 2015; 16:14318-37. [PMID: 26114386 PMCID: PMC4519844 DOI: 10.3390/ijms160714318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/06/2015] [Accepted: 05/14/2015] [Indexed: 12/13/2022] Open
Abstract
The regulation of cell volume is an essential function that is coupled to a variety of physiological processes such as receptor recycling, excitability and contraction, cell proliferation, migration, and programmed cell death. Under stress, cells undergo emergency swelling and respond to such a phenomenon with a regulatory volume decrease (RVD) where they release cellular ions, and other osmolytes as well as a concomitant loss of water. The link between P-glycoprotein, a transmembrane transporter, and cell volume regulation is controversial, and changes in cells volume are measured using microscopy or electrophysiology. For instance, by using the patch-clamp method, our team demonstrated that chloride currents activated in the RVD were more intense and rapid in a breast cancer cell line overexpressing the P-glycoprotein (P-gp). The Cell Lab Quanta SC is a flow cytometry system that simultaneously measures electronic volume, side scatter and three fluorescent colors; altogether this provides unsurpassed population resolution and accurate cell counting. Therefore, here we propose a novel method to follow cellular volume. By using the Coulter-type channel of the cytometer Cell Lab Quanta SC MPL (multi-platform loading), we demonstrated a role for the P-gp during different osmotic treatments, but also a differential activity of the P-gp through the cell cycle. Altogether, our data strongly suggests a role of P-gp in cell volume regulation.
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38
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Rao VR, Perez-Neut M, Kaja S, Gentile S. Voltage-gated ion channels in cancer cell proliferation. Cancers (Basel) 2015; 7:849-75. [PMID: 26010603 PMCID: PMC4491688 DOI: 10.3390/cancers7020813] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 05/12/2015] [Indexed: 12/22/2022] Open
Abstract
Changes of the electrical charges across the surface cell membrane are absolutely necessary to maintain cellular homeostasis in physiological as well as in pathological conditions. The opening of ion channels alter the charge distribution across the surface membrane as they allow the diffusion of ions such as K+, Ca++, Cl.
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Affiliation(s)
- Vidhya R Rao
- Department of Molecular Pharmacology and Therapeutics, Loyola University Chicago 2160 S. 1s tAve, Maywood, IL 60153, USA.
| | - Mathew Perez-Neut
- Department of Molecular Pharmacology and Therapeutics, Loyola University Chicago 2160 S. 1s tAve, Maywood, IL 60153, USA.
| | - Simon Kaja
- Department of Ophthalmology and Vision Research Center, School of Medicine, University of Missouri-Kansas City, 2411 Holmes St., Kansas City, MO 64108, USA.
| | - Saverio Gentile
- Department of Molecular Pharmacology and Therapeutics, Loyola University Chicago 2160 S. 1s tAve, Maywood, IL 60153, USA.
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Pedersen SF, Klausen TK, Nilius B. The identification of a volume-regulated anion channel: an amazing Odyssey. Acta Physiol (Oxf) 2015; 213:868-81. [PMID: 25565132 DOI: 10.1111/apha.12450] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 12/05/2014] [Accepted: 01/05/2015] [Indexed: 01/03/2023]
Abstract
The volume-regulated anion channel (VRAC) plays a pivotal role in cell volume regulation in essentially all cell types studied. Additionally, VRAC appears to contribute importantly to a wide range of other cellular functions and pathological events, including cell motility, cell proliferation, apoptosis and excitotoxic glutamate release in stroke. Although biophysically, pharmacologically and functionally thoroughly described, VRAC has until very recently remained a genetic orphan. The search for the molecular identity of VRAC has been long and has yielded multiple potential candidates, all of which eventually turned out to have properties not fully compatible with those of VRAC. Recently, two groups have independently identified the protein leucine-rich repeats containing 8A (LRRC8A), belonging to family of proteins (LRRC8A-E) distantly related to pannexins, as the likely pore-forming subunit of VRAC. In this brief review, we summarize the history of the discovery of VRAC, outline its basic biophysical and pharmacological properties, link these to several cellular functions in which VRAC appears to play important roles, and sketch the amazing search for the molecular identity of this channel. Finally, we describe properties of the LRRC8 proteins, highlight some features of the LRRC8A knockout mouse and discuss the impact of the discovery of LRRC8 as VRAC on future research.
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Affiliation(s)
- S. F. Pedersen
- Section for Cell and Developmental Biology; Department of Biology; Faculty of Science; University of Copenhagen; Copenhagen Denmark
| | - T. K. Klausen
- Section for Cell and Developmental Biology; Department of Biology; Faculty of Science; University of Copenhagen; Copenhagen Denmark
| | - B. Nilius
- Laboratory of Ion Channel Research; Department of Cellular and Molecular Medicine; KU Leuven, Campus Gasthuisberg; Leuven Belgium
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40
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Hong S, Bi M, Wang L, Kang Z, Ling L, Zhao C. CLC-3 channels in cancer (review). Oncol Rep 2014; 33:507-14. [PMID: 25421907 DOI: 10.3892/or.2014.3615] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 10/30/2014] [Indexed: 11/06/2022] Open
Abstract
Ion channels are involved in regulating cell proliferation and apoptosis (programed cell death). Since increased cellular proliferation and inhibition of apoptosis are characteristic features of tumorigenesis, targeting ion channels is a promising strategy for treating cancer. CLC-3 is a member of the voltage-gated chloride channel superfamily and is expressed in many cancer cells. In the plasma membrane, CLC-3 functions as a chloride channel and is associated with cell proliferation and apoptosis. CLC-3 is also located in intracellular compartments, contributing to their acidity, which increases sequestration of drugs and leads to chemotherapy drug resistance. In this review, we summarize the recent findings concerning the involvement of CLC-3 in cancer and explore its potential in cancer therapy.
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Affiliation(s)
- Sen Hong
- Department of Physiology, The Basic Medical College, Jilin University, Changchun 130021, P.R. China
| | - Miaomiao Bi
- Department of Ophthalmology, The China‑Japan Union Hospital of Jilin University, Jilin University, Changchun 130033, P.R. China
| | - Lei Wang
- Department of Colon and Anal Surgery, The First Hospital of Jilin University, Jilin University, Changchun 130021, P.R. China
| | - Zhenhua Kang
- Department of Colon and Anal Surgery, The First Hospital of Jilin University, Jilin University, Changchun 130021, P.R. China
| | - Limian Ling
- Department of Colon and Anal Surgery, The First Hospital of Jilin University, Jilin University, Changchun 130021, P.R. China
| | - Chunyan Zhao
- Department of Physiology, The Basic Medical College, Jilin University, Changchun 130021, P.R. China
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41
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Abstract
Potassium channels are pore-forming transmembrane proteins that regulate a multitude of biological processes by controlling potassium flow across cell membranes. Aberrant potassium channel functions contribute to diseases such as epilepsy, cardiac arrhythmia, and neuromuscular symptoms collectively known as channelopathies. Increasing evidence suggests that cancer constitutes another category of channelopathies associated with dysregulated channel expression. Indeed, potassium channel–modulating agents have demonstrated antitumor efficacy. Potassium channels regulate cancer cell behaviors such as proliferation and migration through both canonical ion permeation–dependent and noncanonical ion permeation–independent functions. Given their cell surface localization and well-known pharmacology, pharmacological strategies to target potassium channel could prove to be promising cancer therapeutics.
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Affiliation(s)
- Xi Huang
- Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158
| | - Lily Yeh Jan
- Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158Howard Hughes Medical Institute, Department of Physiology, and Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158
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42
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Akita T, Okada Y. Characteristics and roles of the volume-sensitive outwardly rectifying (VSOR) anion channel in the central nervous system. Neuroscience 2014; 275:211-31. [DOI: 10.1016/j.neuroscience.2014.06.015] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/06/2014] [Accepted: 06/07/2014] [Indexed: 01/05/2023]
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43
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Hoffmann EK, Holm NB, Lambert IH. Functions of volume-sensitive and calcium-activated chloride channels. IUBMB Life 2014; 66:257-67. [PMID: 24771413 DOI: 10.1002/iub.1266] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 03/31/2014] [Accepted: 03/31/2014] [Indexed: 01/23/2023]
Abstract
The review describes molecular and functional properties of the volume regulated anion channel and Ca(2+)-dependent Cl(-) channels belonging to the anoctamin family with emphasis on physiological importance of these channels in regulation of cell volume, cell migration, cell proliferation, and programmed cell death. Finally, we discuss the role of Cl(-) channels in various diseases.
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Affiliation(s)
- Else Kay Hoffmann
- Department of Biology, University of Copenhagen, 13 Universitetsparken, Copenhagen Ø, Denmark
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Kaur S, Fielding AB, Gassner G, Carter NJ, Royle SJ. An unmet actin requirement explains the mitotic inhibition of clathrin-mediated endocytosis. eLife 2014; 3:e00829. [PMID: 24550251 PMCID: PMC3924242 DOI: 10.7554/elife.00829] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Clathrin-mediated endocytosis (CME) is the major internalisation route for many different receptor types in mammalian cells. CME is shut down during early mitosis, but the mechanism of this inhibition is unclear. In this study, we show that the mitotic shutdown is due to an unmet requirement for actin in CME. In mitotic cells, membrane tension is increased and this invokes a requirement for the actin cytoskeleton to assist the CME machinery to overcome the increased load. However, the actin cytoskeleton is engaged in the formation of a rigid cortex in mitotic cells and is therefore unavailable for deployment. We demonstrate that CME can be ‘restarted’ in mitotic cells despite high membrane tension, by allowing actin to engage in endocytosis. Mitotic phosphorylation of endocytic proteins is maintained in mitotic cells with restored CME, indicating that direct phosphorylation of the CME machinery does not account for shutdown. DOI:http://dx.doi.org/10.7554/eLife.00829.001 The plasma membrane that surrounds a cell acts as a protective barrier that regulates what can enter or exit the cell. However, large molecules and other ‘cargo’ can get into a cell in a variety of ways. One of these routes—known as clathrin-mediated endocytosis—involves a receptor on the outside of the membrane grabbing hold of the cargo while a protein called clathrin forms a ‘pit’ beneath the receptor. This pit becomes deeper and deeper until the cargo is completely surrounded by clathrin-lined membrane and is brought inside the cell. This process has been studied over the past 50 years, and it is known that clathrin-mediated endocytosis is turned off when a cell begins to divide to produce new cells, and then turned back on when cell division has come to an end. However, there are competing theories as to exactly why this process stops when cell division starts. Now, Kaur et al. have investigated these theories by looking at the role that another protein, called actin, plays in turning off clathrin-mediated endocytosis. Actin is a molecule that forms a sort of scaffolding within the cell (called the cytoskeleton), and it also guides the movement of molecules and larger structures within the cell. Further, when the cell membrane is being stretched, the actin cytoskeleton can assist the clathrin-mediated endocytosis machinery to pull cargo into the cell. So why doesn’t actin help with endocytosis during cell division? The answer, Kaur et al. suggest, is that all the actin in the cell is needed by the cytoskeleton during cell division, so there is no actin available to perform other tasks such as clathrin-mediated endocytosis. Further experiments demonstrated that this form of endocytosis can be ‘restarted’ in dividing cells by treating the cells in a way that frees up some additional actin. The work of Kaur et al. also ruled out the theory that chemical changes to the endocytosis machinery disabled it during cell division. These findings have implications for the delivery of drugs, via endocytosis, to the rapidly dividing cells that are involved in diseases such as cancer. DOI:http://dx.doi.org/10.7554/eLife.00829.002
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Affiliation(s)
- Satdip Kaur
- Division of Biomedical Cell Biology, Warwick Medical School, University of Warwick, Coventry, United Kingdom
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45
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Lang F, Stournaras C. Ion channels in cancer: future perspectives and clinical potential. Philos Trans R Soc Lond B Biol Sci 2014; 369:20130108. [PMID: 24493756 DOI: 10.1098/rstb.2013.0108] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Ion transport across the cell membrane mediated by channels and carriers participate in the regulation of tumour cell survival, death and motility. Moreover, the altered regulation of channels and carriers is part of neoplastic transformation. Experimental modification of channel and transporter activity impacts tumour cell survival, proliferation, malignant progression, invasive behaviour or therapy resistance of tumour cells. A wide variety of distinct Ca(2+) permeable channels, K(+) channels, Na(+) channels and anion channels have been implicated in tumour growth and metastasis. Further experimental information is, however, needed to define the specific role of individual channel isoforms critically important for malignancy. Compelling experimental evidence supports the assumption that the pharmacological inhibition of ion channels or their regulators may be attractive targets to counteract tumour growth, prevent metastasis and overcome therapy resistance of tumour cells. This short review discusses the role of Ca(2+) permeable channels, K(+) channels, Na(+) channels and anion channels in tumour growth and metastasis and the therapeutic potential of respective inhibitors.
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Affiliation(s)
- Florian Lang
- Department of Physiology, University of Tuebingen, , Gmelinstrasse 5, Tübingen 72076, Germany
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46
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Turner KL, Sontheimer H. Cl- and K+ channels and their role in primary brain tumour biology. Philos Trans R Soc Lond B Biol Sci 2014; 369:20130095. [PMID: 24493743 DOI: 10.1098/rstb.2013.0095] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Profound cell volume changes occur in primary brain tumours as they proliferate, invade surrounding tissue or undergo apoptosis. These volume changes are regulated by the flux of Cl(-) and K(+) ions and concomitant movement of water across the membrane, making ion channels pivotal to tumour biology. We discuss which specific Cl(-) and K(+) channels are involved in defined aspects of glioma biology and how these channels are regulated. Cl(-) is accumulated to unusually high concentrations in gliomas by the activity of the NKCC1 transporter and serves as an osmolyte and energetic driving force for volume changes. Cell volume condensation is required as cells enter M phase of the cell cycle and this pre-mitotic condensation is caused by channel-mediated ion efflux. Similarly, Cl(-) and K(+) channels dynamically regulate volume in invading glioma cells allowing them to adjust to small extracellular brain spaces. Finally, cell condensation is a hallmark of apoptosis and requires the concerted activation of Cl(-) and Ca(2+)-activated K(+) channels. Given the frequency of mutation and high importance of ion channels in tumour biology, the opportunity exists to target them for treatment.
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Affiliation(s)
- Kathryn L Turner
- Department of Neurobiology and Center for Glial Biology in Medicine, University of Alabama at Birmingham, , 1719 6th Avenue South, CIRC 410, Birmingham, AL 35294, USA
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47
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Size homeostasis in adherent cells studied by synthetic phase microscopy. Proc Natl Acad Sci U S A 2013; 110:16687-92. [PMID: 24065823 DOI: 10.1073/pnas.1315290110] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The coupling of the rate of cell growth to the rate of cell division determines cell size, a defining characteristic that is central to cell function and, ultimately, to tissue architecture. The physiology of size homeostasis has fascinated generations of biologists, but the mechanism, challenged by experimental limitations, remains largely unknown. In this paper, we propose a unique optical method that can measure the dry mass of thick live cells as accurately as that for thin cells with high computational efficiency. With this technique, we quantify, with unprecedented accuracy, the asymmetry of division in lymphoblasts and epithelial cells. We can then use the Collins-Richmond model of conservation to compute the relationship between growth rate and cell mass. In attached epithelial cells, we find that due to the asymmetry in cell division and size-dependent growth rate, there is active regulation of cell size. Thus, like nonadherent cells, size homeostasis requires feedback control.
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48
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Pedersen SF, Hoffmann EK, Novak I. Cell volume regulation in epithelial physiology and cancer. Front Physiol 2013; 4:233. [PMID: 24009588 PMCID: PMC3757443 DOI: 10.3389/fphys.2013.00233] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Accepted: 08/09/2013] [Indexed: 12/21/2022] Open
Abstract
The physiological function of epithelia is transport of ions, nutrients, and fluid either in secretory or absorptive direction. All of these processes are closely related to cell volume changes, which are thus an integrated part of epithelial function. Transepithelial transport and cell volume regulation both rely on the spatially and temporally coordinated function of ion channels and transporters. In healthy epithelia, specific ion channels/transporters localize to the luminal and basolateral membranes, contributing to functional epithelial polarity. In pathophysiological processes such as cancer, transepithelial and cell volume regulatory ion transport are dys-regulated. Furthermore, epithelial architecture and coordinated ion transport function are lost, cell survival/death balance is altered, and new interactions with the stroma arise, all contributing to drug resistance. Since altered expression of ion transporters and channels is now recognized as one of the hallmarks of cancer, it is timely to consider this especially for epithelia. Epithelial cells are highly proliferative and epithelial cancers, carcinomas, account for about 90% of all cancers. In this review we will focus on ion transporters and channels with key physiological functions in epithelia and known roles in the development of cancer in these tissues. Their roles in cell survival, cell cycle progression, and development of drug resistance in epithelial cancers will be discussed.
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Affiliation(s)
- Stine F Pedersen
- Department of Biology, University of Copenhagen Copenhagen, Denmark
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49
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Ouadid-Ahidouch H, Ahidouch A. K(+) channels and cell cycle progression in tumor cells. Front Physiol 2013; 4:220. [PMID: 23970866 PMCID: PMC3747328 DOI: 10.3389/fphys.2013.00220] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 07/31/2013] [Indexed: 11/24/2022] Open
Abstract
K+ ions play a major role in many cellular processes. The deregulation of K+ signaling is associated with a variety of diseases such as hypertension, atherosclerosis, or diabetes. K+ ions are important for setting the membrane potential, the driving force for Ca2+ influx, and regulate volume of growing cells. Moreover, it is increasingly recognized that K+ channels control cell proliferation through a novel signaling mechanisms triggered and modulated independently of ion fluxes. In cancer, aberrant expression, regulation and/or sublocalization of K+ channels can alter the downstream signals that converge on the cell cycle machinery. Various K+ channels are involved in cell cycle progression and are needed only at particular stages of the cell cycle. Consistent with this idea, the expression of Eag1 and HERG channels fluctuate along the cell cycle. Despite of acquired knowledge, our understanding of K+ channels functioning in cancer cells requires further studies. These include identifying the molecular mechanisms controlling the cell cycle machinery. By understanding how K+ channels regulate cell cycle progression in cancer cells, we will gain insights into how cancer cells subvert the need for K+ signal and its downstream targets to proliferate.
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Affiliation(s)
- Halima Ouadid-Ahidouch
- Laboratory of Cellular and Molecular Physiology EA4667, SFR CAP-SANTE FED 4231, UFR Sciences, University of Picardie Jules Verne Amiens, France
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50
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Jiang H, Sun S. Cellular pressure and volume regulation and implications for cell mechanics. Biophys J 2013; 105:609-19. [PMID: 23931309 PMCID: PMC3736675 DOI: 10.1016/j.bpj.2013.06.021] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/04/2013] [Accepted: 06/12/2013] [Indexed: 11/20/2022] Open
Abstract
In eukaryotic cells, small changes in cell volume can serve as important signals for cell proliferation, death, and migration. Volume and shape regulation also directly impacts the mechanics of cells and tissues. Here, we develop a mathematical model of cellular volume and pressure regulation, incorporating essential elements such as water permeation, mechanosensitive channels, active ion pumps, and active stresses in the cortex. The model can fully explain recent experimental data, and it predicts cellular volume and pressure for several models of cell cortical mechanics. Moreover, we show that when cells are subjected to an externally applied load, such as in an atomic force microscopy indentation experiment, active regulation of volume and pressure leads to a complex cellular response. Instead of the passive mechanics of the cortex, the observed cell stiffness depends on several factors working together. This provides a mathematical explanation of rate-dependent response of cells under force.
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Affiliation(s)
- Hongyuan Jiang
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Sean X. Sun
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland
- Department of Biomedical Engineering and Johns Hopkins Physical Oncology Center, Johns Hopkins University, Baltimore, Maryland
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