1
|
Ng XY, Peh G, Morales-Wong F, Gabriel R, Soong PL, Lin KH, Mehta JS. Towards Clinical Application: Calcium Waves for In Vitro Qualitative Assessment of Propagated Primary Human Corneal Endothelial Cells. Cells 2024; 13:2012. [PMID: 39682760 DOI: 10.3390/cells13232012] [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: 10/25/2024] [Revised: 11/30/2024] [Accepted: 12/04/2024] [Indexed: 12/18/2024] Open
Abstract
Corneal endothelium cells (CECs) regulate corneal hydration between the leaky barrier of the corneal endothelium and the ionic pumps on the surface of CECs. As CECs do not regenerate, loss of CECs leads to poor vision and corneal blindness. Corneal transplant is the only treatment option; however, there is a severe shortage of donor corneas globally. Cell therapy using propagated primary human CECs is an alternative approach to corneal transplantations, and proof of functionality is crucial for validating such CECs. Expression markers like Na-K-ATPase and ZO-1 are typical but not specific to CECs. Assessing the barrier function of the expanded CECs via electrical resistance (i.e., TEER and Ussing's chamber) involves difficult techniques and is thus impractical for clinical application. Calcium has been demonstrated to affect the paracellular permeability of the corneal endothelium. Its absence alters morphology and disrupts apical junctions in bovine CECs, underscoring its importance. Calcium signaling patterns such as calcium waves affect the rate of wound healing in bovine CECs. Therefore, observing calcium waves in expanded CECs could provide valuable insights into their health and functional integrity. Mechanical or chemical stimulations, combined with Ca2+-sensitive fluorescent dyes and time-lapse imaging, can be used to visualize these waves, which could potentially be used to qualify expanded CECs.
Collapse
Affiliation(s)
- Xiao Yu Ng
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore 169856, Singapore
| | - Gary Peh
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore 169856, Singapore
- Eye-Academic Clinical Program (ACP), Duke-National University of Singapore (NUS) Graduate Medical School, Singapore 169857, Singapore
| | - Fernando Morales-Wong
- Department of Ophthalmology, University Hospital and Faculty of Medicine, Autonomous University of Nuevo León (UANL), Monterrey 64460, Mexico
| | - Rami Gabriel
- Department of Ophthalmology, Duke University Health Center, Durham, NC 27705, USA
| | | | - Kun-Han Lin
- Ternion Biosciences, Singapore 574329, Singapore
| | - Jodhbir S Mehta
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore 169856, Singapore
- Eye-Academic Clinical Program (ACP), Duke-National University of Singapore (NUS) Graduate Medical School, Singapore 169857, Singapore
- Corneal and External Diseases Department, Singapore National Eye Centre, Singapore 168751, Singapore
| |
Collapse
|
2
|
Wang J, Platz-Baudin E, Noetzel E, Offenhäusser A, Maybeck V. Expressing Optogenetic Actuators Fused to N-terminal Mucin Motifs Delivers Targets to Specific Subcellular Compartments in Polarized Cells. Adv Biol (Weinh) 2024; 8:e2300428. [PMID: 38015104 DOI: 10.1002/adbi.202300428] [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: 08/15/2023] [Revised: 10/31/2023] [Indexed: 11/29/2023]
Abstract
Optogenetics is a powerful approach in neuroscience research. However, other tissues of the body may benefit from controlled ion currents and neuroscience may benefit from more precise optogenetic expression. The present work constructs three subcellularly-targeted optogenetic actuators based on the channelrhodopsin ChR2-XXL, utilizing 5, 10, or 15 tandem repeats (TR) from mucin as N-terminal targeting motifs and evaluates expression in several polarized and non-polarized cell types. The modified channelrhodopsin maintains its electrophysiological properties, which can be used to produce continuous membrane depolarization, despite the expected size of the repeats. This work then shows that these actuators are subcellularly localized in polarized cells. In polarized epithelial cells, all three actuators localize to just the lateral membrane. The TR-tagged constructs also express subcellularly in cortical neurons, where TR5-ChR2XXL and TR10-ChR2XXL mainly target the somatodendrites. Moreover, the transfection efficiencies are shown to be dependent on cell type and tandem repeat length. Overall, this work verifies that the targeting motifs from epithelial cells can be used to localize optogenetic actuators in both epithelia and neurons, opening epithelia processes to optogenetic manipulation and providing new possibilities to target optogenetic tools.
Collapse
Affiliation(s)
- Jiali Wang
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062, Aachen, Germany
| | - Eric Platz-Baudin
- Institute of Biological Information Processing IBI-2, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Erik Noetzel
- Institute of Biological Information Processing IBI-2, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062, Aachen, Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| |
Collapse
|
3
|
Harraz OF, Delpire E. Recent insights into channelopathies. Physiol Rev 2024; 104:23-31. [PMID: 37561136 DOI: 10.1152/physrev.00022.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/12/2023] [Accepted: 08/05/2023] [Indexed: 08/11/2023] Open
Affiliation(s)
- Osama F Harraz
- Department of Pharmacology, Larner College of Medicine, Vermont Center for Cardiovascular and Brain Health, University of Vermont, Burlington, Vermont, United States
| | - Eric Delpire
- Department of Anesthesiology, Vanderbilt University Medical School, Nashville, Tennessee, United States
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical School, Nashville, Tennessee, United States
| |
Collapse
|
4
|
Chen Y, Yu X, Yan Z, Zhang S, Zhang J, Guo W. Role of epithelial sodium channel-related inflammation in human diseases. Front Immunol 2023; 14:1178410. [PMID: 37559717 PMCID: PMC10407551 DOI: 10.3389/fimmu.2023.1178410] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 06/29/2023] [Indexed: 08/11/2023] Open
Abstract
The epithelial sodium channel (ENaC) is a heterotrimer and is widely distributed throughout the kidneys, blood vessels, lungs, colons, and many other organs. The basic role of the ENaC is to mediate the entry of Na+ into cells; the ENaC also has an important regulatory function in blood pressure, airway surface liquid (ASL), and endothelial cell function. Aldosterone, serum/glucocorticoid kinase 1 (SGK1), shear stress, and posttranslational modifications can regulate the activity of the ENaC; some ion channels also interact with the ENaC. In recent years, it has been found that the ENaC can lead to immune cell activation, endothelial cell dysfunction, aggravated inflammation involved in high salt-induced hypertension, cystic fibrosis, pseudohypoaldosteronism (PHA), and tumors; some inflammatory cytokines have been reported to have a regulatory role on the ENaC. The ENaC hyperfunction mediates the increase of intracellular Na+, and the elevated exchange of Na+ with Ca2+ leads to an intracellular calcium overload, which is an important mechanism for ENaC-related inflammation. Some of the research on the ENaC is controversial or unclear; we therefore reviewed the progress of studies on the role of ENaC-related inflammation in human diseases and their mechanisms.
Collapse
Affiliation(s)
- Yabin Chen
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- National Organ Transplantation (Liver &Kidney Transplantation) Physician Training Centre, Zhengzhou, China
- National Regional Medical Treatment Centre of Henan Organ Transplantation, Zhengzhou, China
| | - Xiao Yu
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- National Organ Transplantation (Liver &Kidney Transplantation) Physician Training Centre, Zhengzhou, China
- National Regional Medical Treatment Centre of Henan Organ Transplantation, Zhengzhou, China
| | - Zhiping Yan
- Henan Organ Transplantation Centre, Zhengzhou, China
- Henan Engineering and Research Center for Diagnosis and Treatment of Hepatobiliary and Pancreatic Surgical Diseases, Zhengzhou, China
| | - Shuijun Zhang
- Henan Research Centre for Organ Transplantation, Zhengzhou, China
| | - Jiacheng Zhang
- Henan Key Laboratory for Digestive Organ Transplantation, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wenzhi Guo
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Open and Key Laboratory for Hepatobiliary and Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, Zhengzhou, China
| |
Collapse
|
5
|
Bioelectric regulation of intestinal stem cells. Trends Cell Biol 2022:S0962-8924(22)00234-3. [PMID: 36396487 PMCID: PMC10183058 DOI: 10.1016/j.tcb.2022.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 11/17/2022]
Abstract
Proper regulation of ion balance across the intestinal epithelium is essential for physiological functions, while ion imbalance causes intestinal disorders with dire health consequences. Ion channels, pumps, and exchangers are vital for regulating ion movements (i.e., bioelectric currents) that control epithelial absorption and secretion. Recent in vivo studies used the Drosophila gut to identify conserved pathways that link regulators of Ca2+, Na+ and Cl- with intestinal stem cell (ISC) proliferation. These studies laid a foundation for using the Drosophila gut to identify conserved proliferative responses triggered by bioelectric regulators. Here, we review these studies, discuss their significance, as well as the advantages of using Drosophila to unravel conserved bioelectrically induced molecular pathways in the intestinal epithelium under physiological, pathophysiological, and regenerative conditions.
Collapse
|
6
|
Pai VP, Cooper BG, Levin M. Screening Biophysical Sensors and Neurite Outgrowth Actuators in Human Induced-Pluripotent-Stem-Cell-Derived Neurons. Cells 2022; 11:cells11162470. [PMID: 36010547 PMCID: PMC9406775 DOI: 10.3390/cells11162470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/26/2022] [Accepted: 08/04/2022] [Indexed: 11/16/2022] Open
Abstract
All living cells maintain a charge distribution across their cell membrane (membrane potential) by carefully controlled ion fluxes. These bioelectric signals regulate cell behavior (such as migration, proliferation, differentiation) as well as higher-level tissue and organ patterning. Thus, voltage gradients represent an important parameter for diagnostics as well as a promising target for therapeutic interventions in birth defects, injury, and cancer. However, despite much progress in cell and molecular biology, little is known about bioelectric states in human stem cells. Here, we present simple methods to simultaneously track ion dynamics, membrane voltage, cell morphology, and cell activity (pH and ROS), using fluorescent reporter dyes in living human neurons derived from induced neural stem cells (hiNSC). We developed and tested functional protocols for manipulating ion fluxes, membrane potential, and cell activity, and tracking neural responses to injury and reinnervation in vitro. Finally, using morphology sensor, we tested and quantified the ability of physiological actuators (neurotransmitters and pH) to manipulate nerve repair and reinnervation. These methods are not specific to a particular cell type and should be broadly applicable to the study of bioelectrical controls across a wide range of combinations of models and endpoints.
Collapse
Affiliation(s)
- Vaibhav P. Pai
- Allen Discovery Center at Tufts University, Medford, MA 02155, USA
| | - Ben G. Cooper
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Michael Levin
- Allen Discovery Center at Tufts University, Medford, MA 02155, USA
- Correspondence:
| |
Collapse
|
7
|
Guo CL. Self-Sustained Regulation or Self-Perpetuating Dysregulation: ROS-dependent HIF-YAP-Notch Signaling as a Double-Edged Sword on Stem Cell Physiology and Tumorigenesis. Front Cell Dev Biol 2022; 10:862791. [PMID: 35774228 PMCID: PMC9237464 DOI: 10.3389/fcell.2022.862791] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 04/29/2022] [Indexed: 12/19/2022] Open
Abstract
Organ development, homeostasis, and repair often rely on bidirectional, self-organized cell-niche interactions, through which cells select cell fate, such as stem cell self-renewal and differentiation. The niche contains multiplexed chemical and mechanical factors. How cells interpret niche structural information such as the 3D topology of organs and integrate with multiplexed mechano-chemical signals is an open and active research field. Among all the niche factors, reactive oxygen species (ROS) have recently gained growing interest. Once considered harmful, ROS are now recognized as an important niche factor in the regulation of tissue mechanics and topology through, for example, the HIF-YAP-Notch signaling pathways. These pathways are not only involved in the regulation of stem cell physiology but also associated with inflammation, neurological disorder, aging, tumorigenesis, and the regulation of the immune checkpoint molecule PD-L1. Positive feedback circuits have been identified in the interplay of ROS and HIF-YAP-Notch signaling, leading to the possibility that under aberrant conditions, self-organized, ROS-dependent physiological regulations can be switched to self-perpetuating dysregulation, making ROS a double-edged sword at the interface of stem cell physiology and tumorigenesis. In this review, we discuss the recent findings on how ROS and tissue mechanics affect YAP-HIF-Notch-PD-L1 signaling, hoping that the knowledge can be used to design strategies for stem cell-based and ROS-targeting therapy and tissue engineering.
Collapse
Affiliation(s)
- Chin-Lin Guo
- Institute of Physics, Academia Sinica, Taipei, Taiwan
| |
Collapse
|
8
|
Xu N, Ayers L, Pastukh V, Alexeyev M, Stevens T, Tambe DT. Impact of Na+ permeation on collective migration of pulmonary arterial endothelial cells. PLoS One 2021; 16:e0250095. [PMID: 33891591 PMCID: PMC8064576 DOI: 10.1371/journal.pone.0250095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/30/2021] [Indexed: 11/19/2022] Open
Abstract
Collective migration of endothelial cells is important for wound healing and angiogenesis. During such migration, each constituent endothelial cell coordinates its magnitude and direction of migration with its neighbors while retaining intercellular adhesion. Ensuring coordination and cohesion involves a variety of intra- and inter-cellular signaling processes. However, the role of permeation of extracellular Na+ in collective cell migration remains unclear. Here, we examined the effect of Na+ permeation in collective migration of pulmonary artery endothelial cell (PAEC) monolayers triggered by either a scratch injury or a barrier removal over 24 hours. In the scratch assay, PAEC monolayers migrated in two approximately linear phases. In the first phase, wound closure started with fast speed which then rapidly reduced within 5 hours after scratching. In the second phase, wound closure maintained at slow and stable speed from 6 to 24 hours. In the absence of extracellular Na+, the wound closure distance was reduced by >50%. Fewer cells at the leading edge protruded prominent lamellipodia. Beside transient gaps, some sustained interendothelial gaps also formed and progressively increased in size over time, and some fused with adjacent gaps. In the absence of both Na+ and scratch injury, PAEC monolayer migrated even more slowly, and interendothelial gaps obviously increased in size towards the end. Pharmacological inhibition of the epithelial Na+ channel (ENaC) using amiloride reduced wound closure distance by 30%. Inhibition of both the ENaC and the Na+/Ca2+ exchanger (NCX) using benzamil further reduced wound closure distance in the second phase and caused accumulation of floating particles in the media. Surprisingly, pharmacological inhibition of the Ca2+ release-activated Ca2+ (CRAC) channel protein 1 (Orai1) using GSK-7975A, the transient receptor potential channel protein 1 and 4 (TRPC1/4) using Pico145, or both Orai1 and TRPC1/4 using combined GSK-7975A and Pico145 treatment did not affect wound closure distance dramatically. Nevertheless, the combined treatment appeared to cause accumulation of floating particles. Note that GSK-7975A also inhibits small inward Ca2+ currents via Orai2 and Orai3 channels, whereas Pico145 also blocks TRPC4, TRPC5, and TRPC1/5 channels. By contrast, gene silence of Orai1 by shRNAs led to a 25% reduction of wound closure in the first 6 hours but had no effect afterwards. However, in the absence of extracellular Na+ or cellular injury, Orai1 did not affect PAEC collective migration. Overall, the data reveal that Na+ permeation into cells contributes to PAEC monolayer collective migration by increasing lamellipodial formation, reducing accumulation of floating particles, and improving intercellular adhesion.
Collapse
Affiliation(s)
- Ningyong Xu
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Linn Ayers
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Viktoriya Pastukh
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Mikhail Alexeyev
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Internal Medicine, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Troy Stevens
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Internal Medicine, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- * E-mail: (DTT); (TS)
| | - Dhananjay T. Tambe
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Pharmacology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Department of Mechanical, Aerospace, and Biomedical Engineering, College of Engineering, University of South Alabama, Mobile, Alabama, United States of America
- * E-mail: (DTT); (TS)
| |
Collapse
|
9
|
Aubin Vega M, Chupin C, Massé C, Dagenais A, Berthiaume Y, Brochiero E. Impact of ENaC downregulation in transgenic mice on the outcomes of acute lung injury induced by bleomycin. Exp Physiol 2021; 106:1110-1119. [PMID: 33502034 DOI: 10.1113/ep089060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/22/2021] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? How does the downregulation of ENaC, the major driving force for alveolar fluid clearance, impact acute lung injury outcomes induced by bleomycin, featuring alveolar damage, as observed during ARDS exudative phase? What is the main finding and its importance? ENaC downregulation in αENaC(-/-)Tg+ mice did not elicit a substantial worsening impact on the main bleomycin outcomes. In ARDS patients, both ENaC alteration and alveolar damage are observed. Thus, novel therapeutic avenues, favouring alveolar integrity restauration, in addition to lung oedema resolution capacity, mainly driven by ENaC, would be essential. ABSTRACT The exudative phase of acute respiratory distress syndrome (ARDS) is characterized by extended alveolar damage, resulting in accumulation of protein-rich inflammatory oedematous fluid in the alveolar space. Na+ reabsorption through ENaC channels is a major driving force for alveolar fluid clearance (AFC) in physiological and pathological conditions. It has previously been shown that partial αENaC impairment in transgenic (αENaC(-/-)Tg+) mice results in reduced AFC in basal conditions and increased wet/dry ratio after thiourea-induced lung oedema, a model in which the integrity of the alveolar epithelium is preserved. The goal of this study was to further investigate the impact of αENaC downregulation in αENaC(-/-)Tg+ mice using an experimental model of acute lung injury induced by bleomycin. A non-significant trend in enhanced weight loss and mortality rates was observed after the bleomycin challenge in αENaC(-/-)Tg+ compared to wild-type (WT) mice. Bronchoalveolar lavage analyses revealed increased TNFα levels and protein concentrations, as indexes of lung inflammation and alveolar damage, in αENaC(-/-)Tg+ mice, compared to WT, at day 3 post-bleomycin, although a statistical difference was no longer measured at day 7. Differential immune cell counts were similar in WT and αENaC(-/-)Tg+ mice challenged with bleomycin. Moreover, lung weight measurements indicated similar oedema levels in WT mice and in transgenic mice with impaired ENaC channels. Altogether, our data indicated that change in ENaC expression does not elicit a significant impact on lung oedema level/resolution in the bleomycin model, featuring alveolar damage.
Collapse
Affiliation(s)
- Mélissa Aubin Vega
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Cécile Chupin
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Chantal Massé
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Institut de recherches cliniques de Montréal (IRCM), Montréal, Québec, Canada
| | - André Dagenais
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Institut de recherches cliniques de Montréal (IRCM), Montréal, Québec, Canada
| | - Yves Berthiaume
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada.,Institut de recherches cliniques de Montréal (IRCM), Montréal, Québec, Canada
| | - Emmanuelle Brochiero
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| |
Collapse
|
10
|
Fucà G, Galli G, Poggi M, Lo Russo G, Proto C, Imbimbo M, Vitali M, Ganzinelli M, Lanti C, Molino G, Stangoni F, Zilembo N, de Braud F, Garassino MC, Signorelli D. Low Baseline Serum Sodium Concentration Is Associated with Poor Clinical Outcomes in Metastatic Non-Small Cell Lung Cancer Patients Treated with Immunotherapy. Target Oncol 2019; 13:795-800. [PMID: 30306460 DOI: 10.1007/s11523-018-0599-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND A consistent percentage of patients with metastatic non-small cell lung cancer (NSCLC) derives no or only marginal benefit from immunotherapy (IO). OBJECTIVE Since serum sodium has been linked to both prognosis in NSCLC and modulation of immune cells activity, we aimed to assess the association between low baseline serum sodium concentration (≤ 135 mEq/L) and clinical outcomes of patients with metastatic NSCLC treated with IO. PATIENTS AND METHODS We included metastatic NSCLC patients treated with checkpoint inhibitors in our department from April 2013 to April 2018 with available baseline serum sodium concentration. Demographics, clinical and pathological characteristics were collected. Survival analyses were performed using the Kaplan-Meier method and the Cox proportional-hazards model. RESULTS Of 197 patients included, 26 (13%) presented low baseline serum sodium concentration. Patients in the low sodium cohort experienced a poorer disease control rate (OR 0.36; 95% CI, 0.15-0.86; Wald test P = .02), median overall survival (OS) (2.8 vs. 11.6 months; HR 3.00; 95% CI, 1.80-4.80; P < .001) and progression-free survival (PFS) (1.8 vs. 3.3 months; HR 2.60; 95% CI, 1.70-3.90; P < .001) compared to patients in the control cohort. At multivariate analyses, low baseline serum sodium concentration was independently associated with disease control and OS, but not with PFS. CONCLUSIONS Our study showed for the first time that low baseline serum sodium concentration is associated with impaired clinical outcomes in patients with metastatic NSCLC treated with IO. The role of serum sodium concentration in this setting warrants further pre-clinical and clinical investigation.
Collapse
Affiliation(s)
- Giovanni Fucà
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy.
| | - Giulia Galli
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Marta Poggi
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Giuseppe Lo Russo
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Claudia Proto
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Martina Imbimbo
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Milena Vitali
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Monica Ganzinelli
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Claudia Lanti
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Giuliano Molino
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Fabiano Stangoni
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Nicoletta Zilembo
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Filippo de Braud
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Marina Chiara Garassino
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| | - Diego Signorelli
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via G. Venezian, 1, 20133, Milan, Italy
| |
Collapse
|
11
|
Weighing the prognostic role of hyponatremia in hospitalized patients with metastatic solid tumors: the HYPNOSIS study. Sci Rep 2019; 9:12993. [PMID: 31506579 PMCID: PMC6736887 DOI: 10.1038/s41598-019-49601-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 07/29/2019] [Indexed: 01/13/2023] Open
Abstract
Previous works linked low sodium concentration with mortality risk in cancer. We aimed at weighing the prognostic impact of hyponatremia in all consecutive patients with metastatic solid tumors admitted in a two-years period at our medical oncology department. Patients were included in two cohorts based on serum sodium concentration on admission. A total of 1025 patients were included, of whom 279 (27.2%) were found to be hyponatremic. The highest prevalence of hyponatremia was observed in biliary tract (51%), prostate (45%) and small-cell lung cancer (38.9%). With a median follow-up of 26.9 months, median OS was 2 months and 13.2 months for the hyponatremia versus control cohort, respectively (HR, 2.65; P < 0.001). In the multivariable model, hyponatremia was independently associated with poorer OS (HR, 1.66; P < 0.001). According to the multivariable model, a nomogram system was developed and validated in an external set of patients. We weighed over time the influence of hyponatremia on survival of patients with metastatic solid tumors and pointed out the possibility to exploit serum sodium assessment to design integrated prognostic tools. Our study also highlights the need for a deeper characterization of the biological role of extracellular sodium levels in tumor development and progression.
Collapse
|
12
|
Dagenais A, Desjardins J, Shabbir W, Roy A, Filion D, Sauvé R, Berthiaume Y. Loss of barrier integrity in alveolar epithelial cells downregulates ENaC expression and activity via Ca 2+ and TRPV4 activation. Pflugers Arch 2018; 470:1615-1631. [PMID: 30088081 DOI: 10.1007/s00424-018-2182-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 06/14/2018] [Accepted: 07/09/2018] [Indexed: 01/08/2023]
Abstract
The epithelial Na channel (ENaC) plays an essential role in lung physiology by modulating the amount of liquid lining the respiratory epithelium. Here, we tested the effect of breaking alveolar epithelial cell barrier integrity on ENaC expression and function. We found that either mechanical wounding by scratching the monolayer or disruption of tight junction with EDTA induced a ~ 50% decrease of α,β and γENaC mRNA expression and an 80% reduction of ENaC short-circuit current (Isc) at 6 h. Scratching the cell monolayer generated a Ca2+ wave that spread from the margin of the scratch to distant cells. Pretreatment with BAPTA-AM, an intracellular Ca2+ chelator, abolished the effect of mechanical wounding and EDTA on αENaC mRNA expression, suggesting that [Ca2+]i is important for this modulation. We tested the hypothesis that a mechanosensitive channel such as TRPV4, a cationic channel known to increase [Ca2+]i, could mediate this effect. Activation of the channel with the TRPV4 specific agonist GSK-1016790A (GSK) decreased αENAC mRNA expression and almost completely abolished ENaC Isc. Pretreatment of alveolar epithelial cells with HC-067047 (HC0), a specific TRPV4 antagonist, reduced the extent of αENAC mRNA downregulation by mechanical wounding and EDTA. Altogether, our results suggest that mechanical stress induced by wounding or TRPV4-mediated loss of tight junction increases [Ca2+]i and elicits a Ca2+ wave that affects ENaC expression and function away from the site of injury. These data are important to better understand how Ca2+ signaling affects lung liquid clearance in injured lungs.
Collapse
Affiliation(s)
- André Dagenais
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada.
- Département de médecine, Université de Montréal, Montreal, Quebec, Canada.
| | - Julie Desjardins
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Waheed Shabbir
- Institute of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Antoine Roy
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Dominic Filion
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Rémy Sauvé
- Département de pharmacologie et physiologie, Université de Montréal, Montreal, Quebec, Canada
| | - Yves Berthiaume
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
- Département de médecine, Université de Montréal, Montreal, Quebec, Canada
| |
Collapse
|
13
|
Jin B, Jin H. Oxymatrine attenuates lipopolysaccharide-induced acute lung injury by activating the epithelial sodium channel and suppressing the JNK signaling pathway. Exp Anim 2018. [PMID: 29526865 PMCID: PMC6083027 DOI: 10.1538/expanim.17-0121] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The epithelial sodium channel (ENaC) and mitogen-activated protein kinase (MAPK) pathway have been reported to be associated with the progression of acute lung injury (ALI). Oxymatrine (OMT) alone or combined with other drugs can ameliorate paraquat- or oleic acid-induced lung injury. However, the effect of OMT on lipopolysaccharide (LPS)-induced ALI remains unknown. The aim of the present study was to evaluate whether OMT can attenuate LPS-induced ALI through regulation of the ENaC and MAPK pathway using an ALI mouse model. Histological assessment of the lung and inflammatory cell counts in bronchoalveolar lavage fluid (BALF) were performed by H&E and Wright-Giemsa staining. The lung wet/dry (W/D) weight ratio and the levels of tumor necrosis factor-α (TNF-α), C-reactive protein (CRP), ENaC subunits, and the MAPK pathway members were determined. Isolated type II rat alveolar epithelial cells were incubated with OMT 30 min before LPS stimulation to investigate the activation of ENaC and the MAPK pathway. The results showed that OMT remarkably alleviated histopathologic changes in lung and pulmonary edema, reduced inflammatory cell counts in BALF, and decreased TNF-α and CRP levels in a dose-dependent manner. OMT significantly increased the three subunits of ENaC proteins in vivo and in vitro, while it decreased p-ERK/ERK, p-p38/p38, and p-JNK/JNK ratios in vivo. However, only the JNK pathway was markedly inhibited in vitro following pretreatment with OMT. Collectively, the results suggested that OMT might alleviate LPS-induced ALI by elevating ENaC proteins and inhibiting the JNK signaling pathway.
Collapse
Affiliation(s)
- Bingji Jin
- Department of Pathogen Biology, China Medical University, 77 Puhe Road, Shenyang, Liaoning 110013, P.R. China.,Department of Cardiothoracic Surgery, The First Affiliated Hospital of Jinzhou Medical University, No. 2, Section 5, Renmin Street, Jinzhou, Liaoning 121001, P.R. China
| | - Hong Jin
- Department of Pathogen Biology, China Medical University, 77 Puhe Road, Shenyang, Liaoning 110013, P.R. China
| |
Collapse
|