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Kurlekar S, Lima JDCC, Li R, Lombardi O, Masson N, Barros AB, Pontecorvi V, Mole DR, Pugh CW, Adam J, Ratcliffe PJ. Oncogenic Cell Tagging and Single-Cell Transcriptomics Reveal Cell Type-Specific and Time-Resolved Responses to Vhl Inactivation in the Kidney. Cancer Res 2024; 84:1799-1816. [PMID: 38502859 PMCID: PMC11148546 DOI: 10.1158/0008-5472.can-23-3248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/16/2024] [Accepted: 03/13/2024] [Indexed: 03/21/2024]
Abstract
Defining the initial events in oncogenesis and the cellular responses they entrain, even in advance of morphologic abnormality, is a fundamental challenge in understanding cancer initiation. As a paradigm to address this, we longitudinally studied the changes induced by loss of the tumor suppressor gene von Hippel Lindau (VHL), which ultimately drives clear cell renal cell carcinoma. Vhl inactivation was directly coupled to expression of a tdTomato reporter within a single allele, allowing accurate visualization of affected cells in their native context and retrieval from the kidney for single-cell RNA sequencing. This strategy uncovered cell type-specific responses to Vhl inactivation, defined a proximal tubular cell class with oncogenic potential, and revealed longer term adaptive changes in the renal epithelium and the interstitium. Oncogenic cell tagging also revealed markedly heterogeneous cellular effects including time-limited proliferation and elimination of specific cell types. Overall, this study reports an experimental strategy for understanding oncogenic processes in which cells bearing genetic alterations can be generated in their native context, marked, and analyzed over time. The observed effects of loss of Vhl in kidney cells provide insights into VHL tumor suppressor action and development of renal cell carcinoma. SIGNIFICANCE Single-cell analysis of heterogeneous and dynamic responses to Vhl inactivation in the kidney suggests that early events shape the cell type specificity of oncogenesis, providing a focus for mechanistic understanding and therapeutic targeting.
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Affiliation(s)
- Samvid Kurlekar
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Joanna D C C Lima
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ran Li
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Olivia Lombardi
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Norma Masson
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ayslan B Barros
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Virginia Pontecorvi
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - David R Mole
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Christopher W Pugh
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Julie Adam
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Peter J Ratcliffe
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- The Francis Crick Institute, 1 Midland Road, London, United Kingdom
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2
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Slawski J, Jaśkiewicz M, Barton A, Kozioł S, Collawn JF, Bartoszewski R. Regulation of the HIF switch in human endothelial and cancer cells. Eur J Cell Biol 2024; 103:151386. [PMID: 38262137 DOI: 10.1016/j.ejcb.2024.151386] [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: 10/25/2023] [Revised: 01/17/2024] [Accepted: 01/17/2024] [Indexed: 01/25/2024] Open
Abstract
Hypoxia-inducible factors (HIFs) are transcription factors that reprogram the transcriptome for cells to survive hypoxic insults and oxidative stress. They are important during embryonic development and reprogram the cells to utilize glycolysis when the oxygen levels are extremely low. This metabolic change facilitates normal cell survival as well as cancer cell survival. The key feature in survival is the transition between acute hypoxia and chronic hypoxia, and this is regulated by the transition between HIF-1 expression and HIF-2/HIF-3 expression. This transition is observed in many human cancers and endothelial cells and referred to as the HIF Switch. Here we discuss the mechanisms involved in the HIF Switch in human endothelial and cancer cells which include mRNA and protein levels of the alpha chains of the HIFs. A major continuing effort in this field is directed towards determining the differences between normal and tumor cell utilization of this important pathway, and how this could lead to potential therapeutic approaches.
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Affiliation(s)
- Jakub Slawski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Maciej Jaśkiewicz
- International Research Agenda 3P, Medicine Laboratory, Medical University of Gdansk, Gdansk, Poland
| | - Anna Barton
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Sylwia Kozioł
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - James F Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Rafał Bartoszewski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland.
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3
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Myronenko O, Foris V, Crnkovic S, Olschewski A, Rocha S, Nicolls MR, Olschewski H. Endotyping COPD: hypoxia-inducible factor-2 as a molecular "switch" between the vascular and airway phenotypes? Eur Respir Rev 2023; 32:220173. [PMID: 36631133 PMCID: PMC9879331 DOI: 10.1183/16000617.0173-2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/08/2022] [Indexed: 01/13/2023] Open
Abstract
COPD is a heterogeneous disease with multiple clinical phenotypes. COPD endotypes can be determined by different expressions of hypoxia-inducible factors (HIFs), which, in combination with individual susceptibility and environmental factors, may cause predominant airway or vascular changes in the lung. The pulmonary vascular phenotype is relatively rare among COPD patients and characterised by out-of-proportion pulmonary hypertension (PH) and low diffusing capacity of the lung for carbon monoxide, but only mild-to-moderate airway obstruction. Its histologic feature, severe remodelling of the small pulmonary arteries, can be mediated by HIF-2 overexpression in experimental PH models. HIF-2 is not only involved in the vascular remodelling but also in the parenchyma destruction. Endothelial cells from human emphysema lungs express reduced HIF-2α levels, and the deletion of pulmonary endothelial Hif-2α leads to emphysema in mice. This means that both upregulation and downregulation of HIF-2 have adverse effects and that HIF-2 may represent a molecular "switch" between the development of the vascular and airway phenotypes in COPD. The mechanisms of HIF-2 dysregulation in the lung are only partly understood. HIF-2 levels may be controlled by NAD(P)H oxidases via iron- and redox-dependent mechanisms. A better understanding of these mechanisms may lead to the development of new therapeutic targets.
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Affiliation(s)
- Oleh Myronenko
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Vasile Foris
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Slaven Crnkovic
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Division of Physiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Andrea Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Department of Anaesthesiology and Intensive Care Medicine, Medical University of Graz, Graz, Austria
| | - Sonia Rocha
- Department of Molecular Physiology and Cell Signalling, Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Mark R Nicolls
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Stanford University, Stanford, CA, USA
| | - Horst Olschewski
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
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4
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Wong SL, Kardia E, Vijayan A, Umashankar B, Pandzic E, Zhong L, Jaffe A, Waters SA. Molecular and Functional Characteristics of Airway Epithelium under Chronic Hypoxia. Int J Mol Sci 2023; 24:ijms24076475. [PMID: 37047450 PMCID: PMC10095024 DOI: 10.3390/ijms24076475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/20/2023] [Accepted: 03/24/2023] [Indexed: 04/14/2023] Open
Abstract
Localized and chronic hypoxia of airway mucosa is a common feature of progressive respiratory diseases, including cystic fibrosis (CF). However, the impact of prolonged hypoxia on airway stem cell function and differentiated epithelium is not well elucidated. Acute hypoxia alters the transcription and translation of many genes, including the CF transmembrane conductance regulator (CFTR). CFTR-targeted therapies (modulators) have not been investigated in vitro under chronic hypoxic conditions found in CF airways in vivo. Nasal epithelial cells (hNECs) derived from eight CF and three non-CF participants were expanded and differentiated at the air-liquid interface (26-30 days) at ambient and 2% oxygen tension (hypoxia). Morphology, global proteomics (LC-MS/MS) and function (barrier integrity, cilia motility and ion transport) of basal stem cells and differentiated cultures were assessed. hNECs expanded at chronic hypoxia, demonstrating epithelial cobblestone morphology and a similar proliferation rate to hNECs expanded at normoxia. Hypoxia-inducible proteins and pathways in stem cells and differentiated cultures were identified. Despite the stem cells' plasticity and adaptation to chronic hypoxia, the differentiated epithelium was significantly thinner with reduced barrier integrity. Stem cell lineage commitment shifted to a more secretory epithelial phenotype. Motile cilia abundance, length, beat frequency and coordination were significantly negatively modulated. Chronic hypoxia reduces the activity of epithelial sodium and CFTR ion channels. CFTR modulator drug response was diminished. Our findings shed light on the molecular pathophysiology of hypoxia and its implications in CF. Targeting hypoxia can be a strategy to augment mucosal function and may provide a means to enhance the efficacy of CFTR modulators.
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Affiliation(s)
- Sharon L Wong
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Egi Kardia
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Abhishek Vijayan
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - Bala Umashankar
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Elvis Pandzic
- Katharina Gaus Light Microscopy Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Ling Zhong
- Bioanalytical Mass Spectrometry Facility, University of New South Wales, Sydney, NSW 2052, Australia
| | - Adam Jaffe
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2052, Australia
| | - Shafagh A Waters
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Molecular and Integrative Cystic Fibrosis Research Centre (miCF_RC), University of New South Wales, Sydney, NSW 2052, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW 2052, Australia
- Department of Respiratory Medicine, Sydney Children's Hospital, Sydney, NSW 2052, Australia
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5
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Berggren-Nylund R, Ryde M, Löfdahl A, Ibáñez-Fonseca A, Kåredal M, Westergren-Thorsson G, Tufvesson E, Larsson-Callerfelt AK. Effects of hypoxia on bronchial and alveolar epithelial cells linked to pathogenesis in chronic lung disorders. Front Physiol 2023; 14:1094245. [PMID: 36994416 PMCID: PMC10040785 DOI: 10.3389/fphys.2023.1094245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 03/02/2023] [Indexed: 03/15/2023] Open
Abstract
Introduction: Chronic lung disorders involve pathological alterations in the lung tissue with hypoxia as a consequence. Hypoxia may influence the release of inflammatory mediators and growth factors including vascular endothelial growth factor (VEGF) and prostaglandin (PG)E2. The aim of this work was to investigate how hypoxia affects human lung epithelial cells in combination with profibrotic stimuli and its correlation to pathogenesis.Methods: Human bronchial (BEAS-2B) and alveolar (hAELVi) epithelial cells were exposed to either hypoxia (1% O2) or normoxia (21% O2) during 24 h, with or without transforming growth factor (TGF)-β1. mRNA expression of genes and proteins related to disease pathology were analysed with qPCR, ELISA or immunocytochemistry. Alterations in cell viability and metabolic activity were determined.Results: In BEAS-2B and hAELVi, hypoxia significantly dowregulated genes related to fibrosis, mitochondrial stress, oxidative stress, apoptosis and inflammation whereas VEGF receptor 2 increased. Hypoxia increased the expression of Tenascin-C, whereas both hypoxia and TGF-β1 stimuli increased the release of VEGF, IL-6, IL-8 and MCP-1 in BEAS-2B. In hAELVi, hypoxia reduced the release of fibroblast growth factor, epidermal growth factor, PGE2, IL-6 and IL-8, whereas TGF-β1 stimulus significantly increased the release of PGE2 and IL-6. TGF-β1 stimulated BEAS-2B cells showed a decreased release of VEGF-A and IL-8, while TGF-β1 stimulated hAELVi cells showed a decreased release of PGE2 and IL-8 during hypoxia compared to normoxia. Metabolic activity was significantly increased by hypoxia in both epithelial cell types.Discussion: In conclusion, our data indicate that bronchial and alveolar epithelial cells respond differently to hypoxia and profibrotic stimuli. The bronchial epithelium appears more responsive to changes in oxygen levels and remodelling processes compared to the alveoli, suggesting that hypoxia may be a driver of pathogenesis in chronic lung disorders.
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Affiliation(s)
| | - Martin Ryde
- Respiratory Medicine, Allergology and Palliative Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Anna Löfdahl
- Lung Biology, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Arturo Ibáñez-Fonseca
- Lung Biology, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Monica Kåredal
- Division of Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | | | - Ellen Tufvesson
- Respiratory Medicine, Allergology and Palliative Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Anna-Karin Larsson-Callerfelt
- Lung Biology, Department of Experimental Medical Science, Lund University, Lund, Sweden
- *Correspondence: Anna-Karin Larsson-Callerfelt,
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6
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Körbelin J, Klein J, Matuszcak C, Runge J, Harbaum L, Klose H, Hennigs JK. Transcription factors in the pathogenesis of pulmonary arterial hypertension-Current knowledge and therapeutic potential. Front Cardiovasc Med 2023; 9:1036096. [PMID: 36684555 PMCID: PMC9853303 DOI: 10.3389/fcvm.2022.1036096] [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: 09/03/2022] [Accepted: 11/21/2022] [Indexed: 01/09/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a disease characterized by elevated pulmonary vascular resistance and pulmonary artery pressure. Mortality remains high in severe cases despite significant advances in management and pharmacotherapy. Since currently approved PAH therapies are unable to significantly reverse pathological vessel remodeling, novel disease-modifying, targeted therapeutics are needed. Pathogenetically, PAH is characterized by vessel wall cell dysfunction with consecutive remodeling of the pulmonary vasculature and the right heart. Transcription factors (TFs) regulate the process of transcribing DNA into RNA and, in the pulmonary circulation, control the response of pulmonary vascular cells to macro- and microenvironmental stimuli. Often, TFs form complex protein interaction networks with other TFs or co-factors to allow for fine-tuning of gene expression. Therefore, identification of the underlying molecular mechanisms of TF (dys-)function is essential to develop tailored modulation strategies in PAH. This current review provides a compendium-style overview of TFs and TF complexes associated with PAH pathogenesis and highlights their potential as targets for vasculoregenerative or reverse remodeling therapies.
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Affiliation(s)
- Jakob Körbelin
- ENDomics Lab, Department of Medicine, Center of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,*Correspondence: Jakob Körbelin,
| | - Julius Klein
- ENDomics Lab, Department of Medicine, Center of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christiane Matuszcak
- ENDomics Lab, Department of Medicine, Center of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johannes Runge
- ENDomics Lab, Department of Medicine, Center of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lars Harbaum
- Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hans Klose
- Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan K. Hennigs
- ENDomics Lab, Department of Medicine, Center of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,Division of Pneumology and Center for Pulmonary Arterial Hypertension Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,Jan K. Hennigs,
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7
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Zhong B, Seah JJ, Liu F, Ba L, Du J, Wang DY. The role of hypoxia in the pathophysiology of chronic rhinosinusitis. Allergy 2022; 77:3217-3232. [PMID: 35603933 DOI: 10.1111/all.15384] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 04/19/2022] [Accepted: 05/17/2022] [Indexed: 02/05/2023]
Abstract
Chronic rhinosinusitis (CRS) is a chronic inflammatory disease of the nasal cavity characterized by excessive nasal mucus secretion and nasal congestion. The development of CRS is related to pathological mechanisms induced by hypoxia. Under hypoxic conditions, the stable expression of both Hypoxia inducible factor-1 (HIF-1) α and HIF-2α are involved in the immune response and inflammatory pathways of CRS. The imbalance in the composition of nasal microbiota may affect the hypoxic state of CRS and perpetuate existing inflammation. Hypoxia affects the differentiation of nasal epithelial cells such as ciliated cells and goblet cells, induces fibroblast proliferation, and leads to epithelial-mesenchymal transition (EMT) and tissue remodeling. Hypoxia also affects the proliferation and differentiation of macrophages, eosinophils, basophils, and mast cells in sinonasal mucosa, and thus influences the inflammatory state of CRS by regulating T cells and B cells. Given the multifactorial nature in which HIF is linked to CRS, this study aims to elucidate the effect of hypoxia on the pathogenic mechanisms of CRS.
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Affiliation(s)
- Bing Zhong
- Upper Airways Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China.,Department of Otolaryngology, Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jun Jie Seah
- Department of Otolaryngology, Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Feng Liu
- Upper Airways Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Luo Ba
- Department of Otolaryngology, People's Hospital of Tibet Autonomous Region, Lhasa, China
| | - Jintao Du
- Upper Airways Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - De Yun Wang
- Department of Otolaryngology, Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
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8
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Wen B, Zheng Z, Wang L, Qian X, Wang X, Chen Y, Bao J, Jiang Y, Ji K, Liu H. HIF-1α is essential for the augmentation of myometrial contractility during labor†. Biol Reprod 2022; 107:1540-1550. [PMID: 36094838 PMCID: PMC9752684 DOI: 10.1093/biolre/ioac174] [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: 05/26/2022] [Revised: 07/29/2022] [Accepted: 09/09/2022] [Indexed: 12/24/2022] Open
Abstract
Uterine contraction is crucial for a successful labor and the prevention of postpartum hemorrhage. It is enhanced by hypoxia; however, its underlying mechanisms are yet to be elucidated. In this study, transcriptomes revealed that hypoxia-inducible factor-1alpha was upregulated in laboring myometrial biopsies, while blockade of hypoxia-inducible factor-1alpha decreased the contractility of the myometrium and myocytes in vitro via small interfering RNA and the inhibitor, 2-methoxyestradiol. Chromatin immunoprecipitation sequencing revealed that hypoxia-inducible factor-1alpha directly binds to the genome of contraction-associated proteins: the promoter of Gja1 and Ptgs2, and the intron of Oxtr. Silencing the hypoxia-inducible factor-1alpha reduced the expression of Ptgs2, Gja1, and Oxtr. Furthermore, blockade of Gja1 or Ptgs2 led to a significant decrease in myometrial contractions in the hypoxic tissue model, whereas atosiban did not remarkably influence contractility. Our study demonstrates that hypoxia-inducible factor-1alpha is essential for promoting myometrial contractility under hypoxia by directly targeting Gja1 and Ptgs2, but not Oxtr. These findings help us to better understand the regulation of myometrial contractions under hypoxia and provide a promising strategy for labor management and postpartum hemorrhage treatment.
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Affiliation(s)
| | | | - Lele Wang
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xueya Qian
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xiaodi Wang
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yunshan Chen
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Junjie Bao
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yanmin Jiang
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Kaiyuan Ji
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Huishu Liu
- Correspondence: Guangzhou Key Laboratory of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, China. E-mail:
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9
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Han J, Wan Q, Seo GY, Kim K, el Baghdady S, Lee JH, Kronenberg M, Liu YC. Hypoxia induces adrenomedullin from lung epithelia, stimulating ILC2 inflammation and immunity. J Exp Med 2022; 219:e20211985. [PMID: 35532553 PMCID: PMC9093746 DOI: 10.1084/jem.20211985] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 02/21/2022] [Accepted: 04/04/2022] [Indexed: 07/25/2023] Open
Abstract
Hypoxia contributes to airway inflammation and remodeling in several lung diseases; however, exactly how hypoxic pulmonary epithelium regulates allergic inflammation remains to be fully characterized. Here, we report that conditional deletion of the E3 ubiquitin ligase VHL in lung epithelial cells resulted in exacerbated type 2 responses accompanied by selective increase of group 2 innate lymphoid cells (ILC2s) at steady state and following inflammation or helminth infection. Ablation of expression of the hypoxia-inducible factor 2α (HIF2α) significantly reversed VHL-mediated ILC2 activation. VHL deficiency in lung epithelial cells caused increased expression of the peptide hormone adrenomedullin (ADM), and our data suggest that HIF2α controls Adm expression. ADM directly promoted ILC2 activation both in vitro and in vivo. Our findings indicate that the hypoxic response mediated by the VHL-HIF2α axis is critical for control of pulmonary type 2 responses by increasing ADM expression in lung epithelia, causing ILC2 activation.
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Affiliation(s)
- Jihye Han
- La Jolla Institute for Immunology, La Jolla, CA
| | - Qingqing Wan
- La Jolla Institute for Immunology, La Jolla, CA
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
| | | | - Kenneth Kim
- La Jolla Institute for Immunology, La Jolla, CA
| | | | - Jee H. Lee
- La Jolla Institute for Immunology, La Jolla, CA
| | - Mitchell Kronenberg
- La Jolla Institute for Immunology, La Jolla, CA
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Yun-Cai Liu
- La Jolla Institute for Immunology, La Jolla, CA
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
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10
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Wang R, Mihaicuta S, Tiotiu A, Corlateanu A, Ioan IC, Bikov A. Asthma and obstructive sleep apnoea in adults and children – an up-to-date review. Sleep Med Rev 2022. [DOI: doi.org/10.1016/j.smrv.2021.101564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Wang R, Mihaicuta S, Tiotiu A, Corlateanu A, Ioan IC, Bikov A. Asthma and obstructive sleep apnoea in adults and children - an up-to-date review. Sleep Med Rev 2022; 61:101564. [PMID: 34902822 DOI: 10.1016/j.smrv.2021.101564] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/27/2021] [Accepted: 10/27/2021] [Indexed: 02/05/2023]
Abstract
Obstructive sleep apnoea (OSA) and asthma are two common respiratory disorders in children and adults. Apart from common risk factors, such as obesity, gastroesophageal reflux disease and allergic rhinitis, emerging evidence suggest that the two diseases may complicate the clinical course of each other. On one hand, OSA modifies asthmatic airway inflammation and is associated with poor asthma control. On the other hand, asthma and its medications increase the collapsibility of the upper airways contributing to the development and worsening of OSA. The overnight respiratory symptoms of OSA and asthma are often similar, and an inpatient polysomnography is often necessary for a proper diagnosis, especially in children. Continuous positive pressure, the gold standard treatment for OSA can improve asthma control in patients suffering from both diseases. However, there is limited evidence how anti-asthma medications act in the same patients. Nevertheless, adenotonsillectomy seems to be effective in children with concomitant asthma and OSA. This review summarises the evidence for the bidirectional link between asthma and OSA, focuses on diagnostic and therapeutic challenges and highlights the need for further research.
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Affiliation(s)
- Ran Wang
- North West Lung Centre, Wythenshawe Hospital, Manchester University Foundation Trust, Manchester, United Kingdom; Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, United Kingdom
| | - Stefan Mihaicuta
- Center for Research and Innovation in Precision Medicine of Respiratory Diseases, Department of Pulmonology, "Victor Babes" University of Medicine and Pharmacy Timisoara, Timisoara, Romania.
| | - Angelica Tiotiu
- Department of Pulmonology, University Hospital of Nancy, France
| | - Alexandru Corlateanu
- Department of Respiratory Medicine, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Republic of Moldova
| | - Iulia Cristina Ioan
- Lung Function Testing Lab, University Children's Hospital of Nancy, France; DevAH, University of Lorraine, France
| | - Andras Bikov
- North West Lung Centre, Wythenshawe Hospital, Manchester University Foundation Trust, Manchester, United Kingdom; Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, United Kingdom
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12
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Hypoxia-Inducible Factor Signaling in Inflammatory Lung Injury and Repair. Cells 2022; 11:cells11020183. [PMID: 35053299 PMCID: PMC8774273 DOI: 10.3390/cells11020183] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 01/27/2023] Open
Abstract
Inflammatory lung injury is characterized by lung endothelial cell (LEC) death, alveolar epithelial cell (AEC) death, LEC-LEC junction weakening, and leukocyte infiltration, which together disrupt nutrient and oxygen transport. Subsequently, lung vascular repair is characterized by LEC and AEC regeneration and LEC-LEC junction re-annealing, which restores nutrient and oxygen delivery to the injured tissue. Pulmonary hypoxia is a characteristic feature of several inflammatory lung conditions, including acute lung injury (ALI), acute respiratory distress syndrome (ARDS), and severe coronavirus disease 2019 (COVID-19). The vascular response to hypoxia is controlled primarily by the hypoxia-inducible transcription factors (HIFs) 1 and 2. These transcription factors control the expression of a wide variety of target genes, which in turn mediate key pathophysiological processes including cell survival, differentiation, migration, and proliferation. HIF signaling in pulmonary cell types such as LECs and AECs, as well as infiltrating leukocytes, tightly regulates inflammatory lung injury and repair, in a manner that is dependent upon HIF isoform, cell type, and injury stimulus. The aim of this review is to describe the HIF-dependent regulation of inflammatory lung injury and vascular repair. The review will also discuss potential areas for future study and highlight putative targets for inflammatory lung conditions such as ALI/ARDS and severe COVID-19. In the development of HIF-targeted therapies to reduce inflammatory lung injury and/or enhance pulmonary vascular repair, it will be vital to consider HIF isoform- and cell-specificity, off-target side-effects, and the timing and delivery strategy of the therapeutic intervention.
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13
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Hou Y, Ding Y, Du D, Yu T, Zhou W, Cui Y, Nie H. Airway Basal Cells Mediate Hypoxia-Induced EMT by Increasing Ribosome Biogenesis. Front Pharmacol 2021; 12:783946. [PMID: 34955855 PMCID: PMC8696177 DOI: 10.3389/fphar.2021.783946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/08/2021] [Indexed: 01/11/2023] Open
Abstract
Excessive secretion of airway mucus and fluid accumulation are the common features of many respiratory diseases, which, in turn, induce cell hypoxia in the airway epithelium, resulting in epithelial–mesenchymal transition (EMT) and ultimately fibrosis. However, the mechanisms of EMT induced by hypoxia in the airway are currently unclear. To mimic the status of edematous fluid retention in the airway, we cultured primary mouse tracheal epithelial cells (MTECs) in a liquid–liquid interface (LLI) mode after full differentiation in a classic air–liquid interface (ALI) culture system. The cell hypoxia was verified by the physical characteristics and lactate production in cultured medium as well as HIF expression in MTECs cultured by LLI mode. EMT was evidenced and mainly mediated by basal cells, supported by flow cytometry and immunofluorescence assay. The differently expressed genes of basal and other airway epithelial cells were found to be enriched in the ribosome by our analysis of an MTEC single-cell RNA sequencing data set and Myc, the global regulator of ribosome biogenesis was identified to be highly expressed in basal cells. We next separated basal cells from bulk MTECs by flow cytometry, and the real-time PCR results showed that ribosome biogenesis was significantly upregulated in basal cells, whereas the inhibition of ribosome biogenesis alleviated the phosphorylation of the mammalian target of rapamycin/AKT and abrogated hypoxia-induced EMT in MTECs. Collectively, these observations strongly suggest that basal cells in the airway epithelium may mediate the process of hypoxia-induced EMT, partly through enhancing ribosome biogenesis.
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Affiliation(s)
- Yapeng Hou
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Yan Ding
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Danni Du
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, China
| | - Tong Yu
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Wei Zhou
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Yong Cui
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, China
| | - Hongguang Nie
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
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14
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Li J, Kim SY, Lainez NM, Coss D, Nair MG. Macrophage-Regulatory T Cell Interactions Promote Type 2 Immune Homeostasis Through Resistin-Like Molecule α. Front Immunol 2021; 12:710406. [PMID: 34349768 PMCID: PMC8327085 DOI: 10.3389/fimmu.2021.710406] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 06/29/2021] [Indexed: 11/20/2022] Open
Abstract
RELMα is a small, secreted protein expressed by type 2 cytokine-activated “M2” macrophages in helminth infection and allergy. At steady state and in response to type 2 cytokines, RELMα is highly expressed by peritoneal macrophages, however, its function in the serosal cavity is unclear. In this study, we generated RELMα TdTomato (Td) reporter/knockout (RαTd) mice and investigated RELMα function in IL-4 complex (IL-4c)-induced peritoneal inflammation. We first validated the RELMαTd/Td transgenic mice and showed that IL-4c injection led to the significant expansion of large peritoneal macrophages that expressed Td but not RELMα protein, while RELMα+/+ mice expressed RELMα and not Td. Functionally, RELMαTd/Td mice had increased IL-4 induced peritoneal macrophage responses and splenomegaly compared to RELMα+/+ mice. Gene expression analysis indicated that RELMαTd/Td peritoneal macrophages were more proliferative and activated than RELMα+/+ macrophages, with increased genes associated with T cell responses, growth factor and cytokine signaling, but decreased genes associated with differentiation and maintenance of myeloid cells. We tested the hypothesis that RαTd/Td macrophages drive aberrant T cell activation using peritoneal macrophage and T cell co-culture. There were no differences in CD4+ T cell effector responses when co-cultured with RELMα+/+ or RELMαTd/Td macrophages, however, RELMαTd/Td macrophages were impaired in their ability to sustain proliferation of FoxP3+ regulatory T cells (Treg). Supportive of the in vitro results, immunofluorescent staining of the spleens revealed significantly decreased FoxP3+ cells in the RELMαTd/Td spleens compared to RELMα+/+ spleens. Taken together, these studies identify a new RELMα regulatory pathway whereby RELMα-expressing macrophages directly sustain Treg proliferation to limit type 2 inflammatory responses.
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Affiliation(s)
- Jiang Li
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, United States
| | - Sang Yong Kim
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, United States
| | - Nancy M Lainez
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, United States
| | - Djurdjica Coss
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, United States
| | - Meera G Nair
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, United States
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15
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Zhang C, Chen M, Tao Q, Chi Z. Cobalt chloride-stimulated hypoxia promotes the proliferation of cholesteatoma keratinocytes via the PI3K/Akt signaling pathway. Int J Med Sci 2021; 18:3403-3411. [PMID: 34522167 PMCID: PMC8436096 DOI: 10.7150/ijms.60617] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 07/12/2021] [Indexed: 12/17/2022] Open
Abstract
Herein, we purposed to explore whether hypoxia triggers proliferation of cholesteatoma keratinocytes via the PI3K-Akt signaling cascade. Cells were inoculated with different concentration of CoCl2. The proliferation and cellular HIF-1α, p-PDK1 and p‑Akt expression levels of cholesteatoma keratinocytes were assessed in vitro. Hypoxia escalated cell proliferation via upregulating p-PDK1 and p‑Akt expressions. Specific inhibitor of the PI3K-Akt signaling cascade, LY294002 markedly inhibited the expression of p‑Akt and significantly reduces the hypoxia‑induced proliferation of cholesteatoma keratinocytes. Our data provides research evidence confirming that hypoxia participates in the onset and progress of cholesteatoma.
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Affiliation(s)
- Chen Zhang
- Department of Otolaryngology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, China
| | - Min Chen
- Department of Otolaryngology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai, 200031, PR China
| | - Qi Tao
- Nursing Department, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, China
| | - Zhangcai Chi
- Department of Otolaryngology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai, 200031, PR China
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16
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Hodson E, Ratcliffe P. Endothelial Oxygen Sensing in Alveolar Maintenance. Am J Respir Crit Care Med 2020; 202:917-919. [PMID: 32668176 PMCID: PMC7528780 DOI: 10.1164/rccm.202006-2149ed] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Emma Hodson
- The Francis Crick Institute, London, United Kingdom.,The Department of Experimental Medicine and Immunotherapeutics, University of Cambridge, Cambridge, United Kingdom and
| | - Peter Ratcliffe
- The Francis Crick Institute, London, United Kingdom.,The Target Discovery Institute and Ludwig Institute for Cancer Research, University of Oxford, Oxford, United Kingdom
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17
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Yang YY, Lin CJ, Wang CC, Chen CM, Kao WJ, Chen YH. Consecutive Hypoxia Decreases Expression of NOTCH3, HEY1, CC10, and FOXJ1 via NKX2-1 Downregulation and Intermittent Hypoxia-Reoxygenation Increases Expression of BMP4, NOTCH1, MKI67, OCT4, and MUC5AC via HIF1A Upregulation in Human Bronchial Epithelial Cells. Front Cell Dev Biol 2020; 8:572276. [PMID: 33015064 PMCID: PMC7500169 DOI: 10.3389/fcell.2020.572276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 08/17/2020] [Indexed: 01/11/2023] Open
Abstract
Previous studies have shown that the experimental models of hypoxia-reoxygenation (H/R) mimics the physiological conditions of ischemia-reperfusion and induce oxidative stress and injury in various types of organs, tissues, and cells, both in vivo and in vitro, including human lung adenocarcinoma epithelial cells. Nonetheless, it had not been reported whether H/R affected proliferation, apoptosis, and expression of stem/progenitor cell markers in the bronchial epithelial cells. In this study, we investigated differential effects of consecutive hypoxia and intermittent 24/24-h cycles of H/R on human bronchial epithelial (HBE) cells derived from the same-race and age-matched healthy subjects (i.e., NHBE) and subjects with chronic obstructive pulmonary disease (COPD) (i.e., DHBE). To analyze gene/protein expression during differentiation, both the NHBE and DHBE cells at the 2nd passage were cultured at the air-liquid interface (ALI) in the differentiation medium under normoxia for 3 days, followed by either culturing under hypoxia (1% O2) for consecutively 9 days and then returning to normoxia for another 9 days, or culturing under 24/24-h cycles of H/R (i.e., 24 h of 1% O2 followed by 24 h of 21% O2, repetitively) for 18 days in total, so that all differentiating HBE cells were exposed to hypoxia for a total of 9 days. In both the normal and diseased HBE cells, intermittent H/R significantly increased HIF1A, BMP4, NOTCH1, MKI67, OCT4, and MUC5AC expression, while consecutive hypoxia significantly decreased NKX2-1, NOTCH3, HEY1, CC10, and FOXJ1 expression. Inhibition of HIF1A or NKX2-1 expression by siRNA transfection respectively decreased BMP4/NOTCH1/MKI67/OCT4/MUC5AC and NOTCH3/HEY1/CC10/FOXJ1 expression in the HBE cells cultured under intermittent H/R to the same levels under normoxia. Overexpression of NKX2-1 via cDNA transfection caused more than 2.8-fold increases in NOTCH3, HEY1, and FOXJ1 mRNA levels in the HBE cells cultured under consecutive hypoxia compared to the levels under normoxia. Taken together, our results show for the first time that consecutive hypoxia decreased expression of the co-regulated gene module NOTCH3/HEY1/CC10 and the ciliogenesis-inducing transcription factor gene FOXJ1 via NKX2-1 mRNA downregulation, while intermittent H/R increased expression of the co-regulated gene module BMP4/NOTCH1/MKI67/OCT4 and the predominant airway mucin gene MUC5AC via HIF1A mRNA upregulation.
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Affiliation(s)
- Yung-Yu Yang
- Department of General Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chao-Ju Lin
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Cheng-Chin Wang
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan.,Section of Respiratory Therapy, Rueifang Miner Hospital, New Taipei City, Taiwan
| | - Chieh-Min Chen
- Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| | - Wen-Jen Kao
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Yi-Hui Chen
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
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18
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Rey E, Meléndez‐Rodríguez F, Marañón P, Gil‐Valle M, Carrasco AG, Torres‐Capelli M, Chávez S, del Pozo‐Maroto E, Rodríguez de Cía J, Aragonés J, García‐Monzón C, González‐Rodríguez Á. Hypoxia-inducible factor 2α drives hepatosteatosis through the fatty acid translocase CD36. Liver Int 2020; 40:2553-2567. [PMID: 32432822 PMCID: PMC7539965 DOI: 10.1111/liv.14519] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 05/11/2020] [Accepted: 05/12/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Molecular mechanisms by which hypoxia might contribute to hepatosteatosis, the earliest stage in non-alcoholic fatty liver disease (NAFLD) pathogenesis, remain still to be elucidated. We aimed to assess the impact of hypoxia-inducible factor 2α (HIF2α) on the fatty acid translocase CD36 expression and function in vivo and in vitro. METHODS CD36 expression and intracellular lipid content were determined in hypoxic hepatocytes, and in hypoxic CD36- or HIF2α -silenced human liver cells. Histological analysis, and HIF2α and CD36 expression were evaluated in livers from animals in which von Hippel-Lindau (Vhl) gene is inactivated (Vhlf/f -deficient mice), or both Vhl and Hif2a are simultaneously inactivated (Vhlf/f Hif2α/f -deficient mice), and from 33 biopsy-proven NAFLD patients and 18 subjects with histologically normal liver. RESULTS In hypoxic hepatocytes, CD36 expression and intracellular lipid content were augmented. Noteworthy, CD36 knockdown significantly reduced lipid accumulation, and HIF2A gene silencing markedly reverted both hypoxia-induced events in hypoxic liver cells. Moreover livers from Vhlf/f -deficient mice showed histologic characteristics of non-alcoholic steatohepatitis (NASH) and increased CD36 mRNA and protein amounts, whereas both significantly decreased and NASH features markedly ameliorated in Vhlf/f Hif2αf/f -deficient mice. In addition, both HIF2α and CD36 were significantly overexpressed within the liver of NAFLD patients and, interestingly, a significant positive correlation between hepatic transcript levels of CD36 and erythropoietin (EPO), a HIF2α -dependent gene target, was observed in NAFLD patients. CONCLUSIONS This study provides evidence that HIF2α drives lipid accumulation in human hepatocytes by upregulating CD36 expression and function, and could contribute to hepatosteatosis setup.
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Affiliation(s)
- Esther Rey
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain
| | - Florinda Meléndez‐Rodríguez
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaUniversidad Autónoma de MadridMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Patricia Marañón
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain
| | - Miriam Gil‐Valle
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain
| | - Almudena G. Carrasco
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain,Present address:
Dpto. Ciencias Básicas de la SaludUniversidad Rey Juan CarlosAlcorcónSpain
| | - Mar Torres‐Capelli
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaUniversidad Autónoma de MadridMadridSpain
| | - Stephania Chávez
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain
| | - Elvira del Pozo‐Maroto
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD)MadridSpain
| | - Javier Rodríguez de Cía
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD)MadridSpain
| | - Julián Aragonés
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaUniversidad Autónoma de MadridMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Carmelo García‐Monzón
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD)MadridSpain
| | - Águeda González‐Rodríguez
- Unidad de InvestigaciónHospital Universitario Santa CristinaInstituto de Investigación Sanitaria del Hospital Universitario de La PrincesaMadridSpain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD)MadridSpain
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19
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Bouthelier A, Aragonés J. Role of the HIF oxygen sensing pathway in cell defense and proliferation through the control of amino acid metabolism. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118733. [DOI: 10.1016/j.bbamcr.2020.118733] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/15/2020] [Accepted: 04/26/2020] [Indexed: 12/29/2022]
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20
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Acosta‐Iborra B, Tiana M, Maeso‐Alonso L, Hernández‐Sierra R, Herranz G, Santamaria A, Rey C, Luna R, Puente‐Santamaria L, Marques MM, Marin MC, del Peso L, Jiménez B. Hypoxia compensates cell cycle arrest with progenitor differentiation during angiogenesis. FASEB J 2020; 34:6654-6674. [DOI: 10.1096/fj.201903082r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Bárbara Acosta‐Iborra
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Maria Tiana
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz Madrid Spain
- CIBER de Enfermedades Respiratorias (CIBERES) Instituto de Salud Carlos III Madrid Spain
| | - Laura Maeso‐Alonso
- Departamento de Biología Molecular, Laboratorio de Diferenciación Celular y Diseño de Modelos Celulares Instituto de Biomedicina, Universidad de León León Spain
| | - Rosana Hernández‐Sierra
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Gonzalo Herranz
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Andrea Santamaria
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Carlos Rey
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Raquel Luna
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Laura Puente‐Santamaria
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
| | - Margarita M. Marques
- Departamento de Producción Animal, Laboratorio de Diferenciación Celular y Diseño de Modelos Celulares Instituto de Desarrollo Ganadero y Sanidad Animal, Universidad de León León Spain
| | - Maria C. Marin
- Departamento de Biología Molecular, Laboratorio de Diferenciación Celular y Diseño de Modelos Celulares Instituto de Biomedicina, Universidad de León León Spain
| | - Luis del Peso
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz Madrid Spain
- CIBER de Enfermedades Respiratorias (CIBERES) Instituto de Salud Carlos III Madrid Spain
| | - Benilde Jiménez
- Departamento de Bioquímica Universidad Autónoma de Madrid (UAM), Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC‐UAM Madrid Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz Madrid Spain
- CIBER de Enfermedades Respiratorias (CIBERES) Instituto de Salud Carlos III Madrid Spain
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21
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Moreno-Domínguez A, Ortega-Sáenz P, Gao L, Colinas O, García-Flores P, Bonilla-Henao V, Aragonés J, Hüttemann M, Grossman LI, Weissmann N, Sommer N, López-Barneo J. Acute O 2 sensing through HIF2α-dependent expression of atypical cytochrome oxidase subunits in arterial chemoreceptors. Sci Signal 2020; 13:scisignal.aay9452. [PMID: 31848220 DOI: 10.1126/scisignal.aay9452] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Acute cardiorespiratory responses to O2 deficiency are essential for physiological homeostasis. The prototypical acute O2-sensing organ is the carotid body, which contains glomus cells expressing K+ channels whose inhibition by hypoxia leads to transmitter release and activation of nerve fibers terminating in the brainstem respiratory center. The mechanism by which changes in O2 tension modulate ion channels has remained elusive. Glomus cells express genes encoding HIF2α (Epas1) and atypical mitochondrial subunits at high levels, and mitochondrial NADH and reactive oxygen species (ROS) accumulation during hypoxia provides the signal that regulates ion channels. We report that inactivation of Epas1 in adult mice resulted in selective abolition of glomus cell responsiveness to acute hypoxia and the hypoxic ventilatory response. Epas1 deficiency led to the decreased expression of atypical mitochondrial subunits in the carotid body, and genetic deletion of Cox4i2 mimicked the defective hypoxic responses of Epas1-null mice. These findings provide a mechanistic explanation for the acute O2 regulation of breathing, reveal an unanticipated role of HIF2α, and link acute and chronic adaptive responses to hypoxia.
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Affiliation(s)
- Alejandro Moreno-Domínguez
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain
| | - Patricia Ortega-Sáenz
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Seville 41013, Spain
| | - Lin Gao
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Seville 41013, Spain
| | - Olalla Colinas
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain
| | - Paula García-Flores
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Seville 41013, Spain
| | - Victoria Bonilla-Henao
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Seville 41013, Spain
| | - Julián Aragonés
- Research Unit, Hospital of Santa Cristina, Research Institute Princesa (IP), Autonomous University of Madrid, Madrid 28009, Spain.,CIBER de Enfermedades Cardiovasculares, Madrid 28009, Spain
| | - Maik Hüttemann
- Center for Molecular Medicine and Genetics, Wayne State University, School of Medicine, Detroit, MI 48201, USA
| | - Lawrence I Grossman
- Center for Molecular Medicine and Genetics, Wayne State University, School of Medicine, Detroit, MI 48201, USA
| | - Norbert Weissmann
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Centre (UGMLC), German Centre for Lung Research (DZL), Justus-Liebig-University, Giessen 35392, Germany
| | - Natascha Sommer
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Centre (UGMLC), German Centre for Lung Research (DZL), Justus-Liebig-University, Giessen 35392, Germany
| | - José López-Barneo
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville 41013, Spain. .,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Seville 41009, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Seville 41013, Spain
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22
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Bai C, Liu X, Qiu C, Zheng J. FoxM1 is regulated by both HIF-1α and HIF-2α and contributes to gastrointestinal stromal tumor progression. Gastric Cancer 2019; 22:91-103. [PMID: 29948390 DOI: 10.1007/s10120-018-0846-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 06/04/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND FoxM1 plays important regulatory roles in a variety of diseases. However, the functional role of FoxM1 and mechanisms responsible for its expression in gastrointestinal stromal tumor (GIST) is not thoroughly understood. METHODS FoxM1 protein expression and biological function were examined in human GIST tissues and cells using immunohistochemistry, quantitative real-time PCR, western blot, CCK-8, wound-healing- and Matrigel invasion assays, respectively. The role of hypoxia-inducible factor (HIF) signaling in FoxM1 expression was investigated using chromatin immunoprecipitation and luciferase reporter and in vivo tumor growth assays. RESULTS FoxM1 was highly expressed in highly proliferative and migratory/invasive GIST specimens. Upregulation of FoxM1 was positively correlated with the expression of HIF-1α and HIF-2α in GIST specimens, and hypoxia-induced FoxM1 expression in GIST cells. Functionally, ectopic expression of FoxM1 significantly promoted GIST cell proliferation, cell cycle progression, migration and invasion, whereas the knockdown of endogenous FoxM1 of hypoxic GIST cells had the opposite effects. Molecularly, FoxM1 was transcriptionally regulated by HIF-2α under normoxia, whereas it was upregulated by both HIF-1α and HIF-2α under hypoxia. The xenograft tumor data further confirmed the regulated effect of HIF-1α and HIF-2α on FoxM1, and demonstrated that the simultaneous downregulation of both HIF-1α and HIF-2α inhibited GIST tumor growth. CONCLUSIONS Our data demonstrated the critical role of FoxM1 in promoting GIST progression and uncovered a novel HIF-1α/HIF-2α-FoxM1 axis. These findings identify FoxM1 as a possible new molecular target for designing novel therapeutic treatments to control GIST progression.
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Affiliation(s)
- Chenguang Bai
- Department of Pathology, Changhai Hospital, Second Military Medical University, 168, Changhai Rd., Shanghai, 200433, China
| | - Xiaohong Liu
- Department of Pathology, Changhai Hospital, Second Military Medical University, 168, Changhai Rd., Shanghai, 200433, China
| | - Cen Qiu
- Department of Pathology, Changhai Hospital, Second Military Medical University, 168, Changhai Rd., Shanghai, 200433, China
| | - Jianming Zheng
- Department of Pathology, Changhai Hospital, Second Military Medical University, 168, Changhai Rd., Shanghai, 200433, China.
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23
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Urrutia AA, Aragonés J. HIF Oxygen Sensing Pathways in Lung Biology. Biomedicines 2018; 6:biomedicines6020068. [PMID: 29882755 PMCID: PMC6027477 DOI: 10.3390/biomedicines6020068] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 05/28/2018] [Accepted: 05/30/2018] [Indexed: 12/30/2022] Open
Abstract
Cellular responses to oxygen fluctuations are largely mediated by hypoxia-inducible factors (HIFs). Upon inhalation, the first organ inspired oxygen comes into contact with is the lungs, but the understanding of the pulmonary HIF oxygen-sensing pathway is still limited. In this review we will focus on the role of HIF1α and HIF2α isoforms in lung responses to oxygen insufficiency. In particular, we will discuss novel findings regarding their role in the biology of smooth muscle cells and endothelial cells in the context of hypoxia-induced pulmonary vasoconstriction. Moreover, we will also discuss recent studies into HIF-dependent responses in the airway epithelium, which have been even less studied than the HIF-dependent vascular responses in the lungs. In summary, we will review the biological functions executed by HIF1 or HIF2 in the pulmonary vessels and epithelium to control lung responses to oxygen fluctuations as well as their pathological consequences in the hypoxic lung.
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Affiliation(s)
- Andrés A Urrutia
- Research Unit, Hospital of Santa Cristina, Research Institute Princesa (IP), Autonomous University of Madrid, 28009 Madrid, Spain.
| | - Julián Aragonés
- Research Unit, Hospital of Santa Cristina, Research Institute Princesa (IP), Autonomous University of Madrid, 28009 Madrid, Spain.
- CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, 28029 Madrid, Spain.
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24
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Macias D, Cowburn AS, Torres-Torrelo H, Ortega-Sáenz P, López-Barneo J, Johnson RS. HIF-2α is essential for carotid body development and function. eLife 2018; 7:34681. [PMID: 29671738 PMCID: PMC5916566 DOI: 10.7554/elife.34681] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 04/18/2018] [Indexed: 02/06/2023] Open
Abstract
Mammalian adaptation to oxygen flux occurs at many levels, from shifts in cellular metabolism to physiological adaptations facilitated by the sympathetic nervous system and carotid body (CB). Interactions between differing forms of adaptive response to hypoxia, including transcriptional responses orchestrated by the Hypoxia Inducible transcription Factors (HIFs), are complex and clearly synergistic. We show here that there is an absolute developmental requirement for HIF-2α, one of the HIF isoforms, for growth and survival of oxygen sensitive glomus cells of the carotid body. The loss of these cells renders mice incapable of ventilatory responses to hypoxia, and this has striking effects on processes as diverse as arterial pressure regulation, exercise performance, and glucose homeostasis. We show that the expansion of the glomus cells is correlated with mTORC1 activation, and is functionally inhibited by rapamycin treatment. These findings demonstrate the central role played by HIF-2α in carotid body development, growth and function.
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Affiliation(s)
- David Macias
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Andrew S Cowburn
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.,Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | | | | | | | - Randall S Johnson
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.,Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
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25
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Dong XF, Liu TQ, Zhi XT, Zou J, Zhong JT, Li T, Mo XL, Zhou W, Guo WW, Liu X, Chen YY, Li MY, Zhong XG, Han YM, Wang ZH, Dong ZR. COX-2/PGE2 Axis Regulates HIF2α Activity to Promote Hepatocellular Carcinoma Hypoxic Response and Reduce the Sensitivity of Sorafenib Treatment. Clin Cancer Res 2018. [PMID: 29514844 DOI: 10.1158/1078-0432.ccr-17-2725] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Xiao-Feng Dong
- Department of Hepatobiliary Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Tian-Qi Liu
- Department of Hepatobiliary Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Xu-Ting Zhi
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Jie Zou
- Department of Geriatrics, Qilu Hospital, Shandong University, Jinan, China
| | - Jing-Tao Zhong
- Department of Hepatobiliary Surgery, Shandong Cancer Hospital affiliated to Shandong University, Jinan, China
| | - Tao Li
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Xiang-Lan Mo
- Department of Pathology, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Wei Zhou
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Wen-Wen Guo
- Department of Pathology, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Xia Liu
- Department of Pathology, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Yuan-Yuan Chen
- Department of Hepatobiliary Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Meng-Yang Li
- Department of Hepatobiliary Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Xiao-Gang Zhong
- Department of Gastrointestinal Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Ya-Min Han
- Department of Gastrointestinal Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Zhong-Hao Wang
- Department of Clinical Medicine, Second Military Medical University, Shanghai, China
| | - Zhao-Ru Dong
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China.
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26
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Comparison of changes in mitochondrial bioenergetics between keratinocytes in human external auditory canal skin and cholesteatomas from normoxia to hypoxia. Sci Rep 2018; 8:125. [PMID: 29317713 PMCID: PMC5760563 DOI: 10.1038/s41598-017-18536-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 12/13/2017] [Indexed: 01/28/2023] Open
Abstract
Cholesteatoma has attracted many studies seeking to uncover its nature and the pathogenesis of related diseases. However, no researchers have explored the mitochondrial bioenergetics of cholesteatoma. The aim of this study was to investigate the energy demand and differential mitochondrial respiration profiles between keratinocytes in external auditory canal (EAC) skin and cholesteatoma samples cultured in normoxic (20% O2) and hypoxic (5% O2) conditions. Enhanced cellular proliferation of both types of keratinocytes was found in hypoxia compared to normoxia. In 20% O2 conditions, cholesteatoma keratinocytes exhibited less mitochondrial mass, lower ATP levels, and significantly lower basal oxygen consumption rate (OCR) and reserve capacity compared to normal skin keratinocytes. In contrast, in hypoxic conditions, cholesteatoma keratinocytes showed markedly higher levels in maximal OCR and reserve capacity, as well as lower proton leak OCRs, compared to normal skin keratinocytes. Hypoxia induced the reverse mitochondrial bioenergy profile from that in normoxia between these two types of keratinocytes, implying that an adaptive change of mitochondrial respiration to oxygen fluctuations may develop in cases of cholesteatoma. Such adaptation in response to hypoxic conditions may play a role in explaining the pathogenesis of acquired cholesteatoma.
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