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Liu W, Sun X, Huang J, Zhang J, Liang Z, Zhu J, Chen T, Zeng Y, Peng M, Li X, Zeng L, Lei W, Cheng J. Development and validation of a genomic nomogram based on a ceRNA network for comprehensive analysis of obstructive sleep apnea. Front Genet 2023; 14:1084552. [PMID: 36968605 PMCID: PMC10036397 DOI: 10.3389/fgene.2023.1084552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/13/2023] [Indexed: 03/12/2023] Open
Abstract
Objectives: Some ceRNA associated with lncRNA have been considered as possible diagnostic and therapeutic biomarkers for obstructive sleep apnea (OSA). We intend to identify the potential hub genes for the development of OSA, which will provide a foundation for the study of the molecular mechanism underlying OSA and for the diagnosis and treatment of OSA.Methods: We collected plasma samples from OSA patients and healthy controls for the detection of ceRNA using a chip. Based on the differential expression of lncRNA, we identified the target genes of miRNA that bind to lncRNAs. We then constructed lncRNA-related ceRNA networks, performed functional enrichment analysis and protein-protein interaction analysis, and performed internal and external validation of the expression levels of stable hub genes. Then, we conducted LASSO regression analysis on the stable hub genes, selected relatively significant genes to construct a simple and easy-to-use nomogram, validated the nomogram, and constructed the core ceRNA sub-network of key genes.Results: We successfully identified 282 DElncRNAs and 380 DEmRNAs through differential analysis, and we constructed an OSA-related ceRNA network consisting of 292 miRNA-lncRNAs and 41 miRNA-mRNAs. Through PPI and hub gene selection, we obtained 7 additional robust hub genes, CCND2, WT1, E2F2, IRF1, BAZ2A, LAMC1, and DAB2. Using LASSO regression analysis, we created a nomogram with four predictors (CCND2, WT1, E2F2, and IRF1), and its area under the curve (AUC) is 1. Finally, we constructed a core ceRNA sub-network composed of 74 miRNA-lncRNA and 7 miRNA-mRNA nodes.Conclusion: Our study provides a new foundation for elucidating the molecular mechanism of lncRNA in OSA and for diagnosing and treating OSA.
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Affiliation(s)
- Wang Liu
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xishi Sun
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jiewen Huang
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jinjian Zhang
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zhengshi Liang
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jinru Zhu
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Tao Chen
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yu Zeng
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Min Peng
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xiongbin Li
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Lijuan Zeng
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Wei Lei
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- *Correspondence: Junfen Cheng, ; Wei Lei,
| | - Junfen Cheng
- The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- *Correspondence: Junfen Cheng, ; Wei Lei,
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HIF-1-Dependent Induction of β3 Adrenoceptor: Evidence from the Mouse Retina. Cells 2022; 11:cells11081271. [PMID: 35455951 PMCID: PMC9029465 DOI: 10.3390/cells11081271] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 02/01/2023] Open
Abstract
A major player in the homeostatic response to hypoxia is the hypoxia-inducible factor (HIF)-1 that transactivates a number of genes involved in neovessel proliferation in response to low oxygen tension. In the retina, hypoxia overstimulates β-adrenoceptors (β-ARs) which play a key role in the formation of pathogenic blood vessels. Among β-ARs, β3-AR expression is increased in proliferating vessels in concomitance with increased levels of HIF-1α and vascular endothelial growth factor (VEGF). Whether, similarly to VEGF, hypoxia-induced β3-AR upregulation is driven by HIF-1 is still unknown. We used the mouse model of oxygen-induced retinopathy (OIR), an acknowledged model of retinal angiogenesis, to verify the hypothesis of β3-AR transcriptional regulation by HIF-1. Investigation of β3-AR regulation over OIR progression revealed that the expression profile of β3-AR depends on oxygen tension, similar to VEGF. The additional evidence that HIF-1α stabilization decouples β3-AR expression from oxygen levels further indicates that HIF-1 regulates the expression of the β3-AR gene in the retina. Bioinformatics predicted the presence of six HIF-1 binding sites (HBS #1-6) upstream and inside the mouse β3-AR gene. Among these, HBS #1 has been identified as the most suitable HBS for HIF-1 binding. Chromatin immunoprecipitation-qPCR demonstrated an effective binding of HIF-1 to HBS #1 indicating the existence of a physical interaction between HIF-1 and the β3-AR gene. The additional finding that β3-AR gene expression is concomitantly activated indicates the possibility that HIF-1 transactivates the β3-AR gene. Our results are indicative of β3-AR involvement in HIF-1-mediated response to hypoxia.
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Kirschner KM, Kelterborn S, Stehr H, Penzlin JLT, Jacobi CLJ, Endesfelder S, Sieg M, Kruppa J, Dame C, Sciesielski LK. Adaptation of the Oxygen Sensing System during Lung Development. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9714669. [PMID: 35242281 PMCID: PMC8886745 DOI: 10.1155/2022/9714669] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 01/18/2022] [Indexed: 12/22/2022]
Abstract
During gestation, the most drastic change in oxygen supply occurs with the onset of ventilation after birth. As the too early exposure of premature infants to high arterial oxygen pressure leads to characteristic diseases, we studied the adaptation of the oxygen sensing system and its targets, the hypoxia-inducible factor- (HIF-) regulated genes (HRGs) in the developing lung. We draw a detailed picture of the oxygen sensing system by integrating information from qPCR, immunoblotting, in situ hybridization, and single-cell RNA sequencing data in ex vivo and in vivo models. HIF1α protein was completely destabilized with the onset of pulmonary ventilation, but did not coincide with expression changes in bona fide HRGs. We observed a modified composition of the HIF-PHD system from intrauterine to neonatal phases: Phd3 was significantly decreased, while Hif2a showed a strong increase and the Hif3a isoform Ipas exclusively peaked at P0. Colocalization studies point to the Hif1a-Phd1 axis as the main regulator of the HIF-PHD system in mouse lung development, complemented by the Hif3a-Phd3 axis during gestation. Hif3a isoform expression showed a stepwise adaptation during the periods of saccular and alveolar differentiation. With a strong hypoxic stimulus, lung ex vivo organ cultures displayed a functioning HIF system at every developmental stage. Approaches with systemic hypoxia or roxadustat treatment revealed only a limited in vivo response of HRGs. Understanding the interplay of the oxygen sensing system components during the transition from saccular to alveolar phases of lung development might help to counteract prematurity-associated diseases like bronchopulmonary dysplasia.
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Affiliation(s)
- Karin M. Kirschner
- Institute of Translational Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Simon Kelterborn
- Institute of Translational Physiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Herrmann Stehr
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Johanna L. T. Penzlin
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Charlotte L. J. Jacobi
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Stefanie Endesfelder
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Miriam Sieg
- Institute of Biometry and Clinical Epidemiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Jochen Kruppa
- Institute of Medical Informatics, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Christof Dame
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Lina K. Sciesielski
- Department of Neonatology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany
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Sasagawa T, Nagamatsu T, Yanagisawa M, Fujii T, Shibuya M. Hypoxia-inducible factor-1β is essential for upregulation of the hypoxia-induced FLT1 gene in placental trophoblasts. Mol Hum Reprod 2021; 27:6402014. [PMID: 34665260 PMCID: PMC8633902 DOI: 10.1093/molehr/gaab065] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/17/2021] [Indexed: 12/27/2022] Open
Abstract
Placental hypoxia and increased levels of maternal blood anti-angiogenic protein, soluble fms-like tyrosine kinase-1 (sFLT1), are associated with the pathogenesis of pre-eclampsia. We have demonstrated that hypoxia-inducible factor (HIF)-2α mediates the upregulation of the hypoxia-induced FLT1 gene in trophoblasts and their cell lines. Here, we investigated the involvement of HIF-1β, which acts as a dimerization partner for HIF-α, in the upregulation of the FLT1 gene via hypoxia. We confirmed the interactions between HIF-1β and HIF-2α in the nuclei of BeWo, JAR and JEG-3 cells under hypoxia via co-immunoprecipitation. We found that hypoxia-induced upregulation of the FLT1 gene in BeWo cells and secretion of sFLT1 in human primary trophoblasts were significantly reduced by siRNAs targeting HIF-1β. Moreover, the upregulation of the FLT1 gene in BeWo cells induced by dimethyloxaloylglycine (DMOG) was also inhibited by silencing either HIF-2α or HIF-1β mRNA. It was recently shown that DNA demethylation increases both basal and hypoxia-induced expression levels of the FLT1 gene in three trophoblast-derived cell lines. In the demethylated BeWo cells, siRNAs targeting HIF-2α and HIF-1β suppressed the further increase in the expression levels of the FLT1 gene due to hypoxia or treatment with DMOG. However, luciferase reporter assays and bisulfite sequencing revealed that a hypoxia response element (-966 to -962) of the FLT1 gene is not involved in hypoxia or DMOG-induced upregulation of the FLT1 gene. These findings suggest that HIF-1β is essential for the elevated production of sFLT1 in the hypoxic trophoblasts and that the HIF-2α/HIF-1β complex may be a crucial therapeutic target for pre-eclampsia.
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Affiliation(s)
- Tadashi Sasagawa
- Institute of Physiology and Medicine, Jobu University, Gunma 370-1393, Japan
| | - Takeshi Nagamatsu
- Department of Obstetrics and Gynecology, The University of Tokyo, Tokyo 113-8655, Japan
| | - Manami Yanagisawa
- Department of Obstetrics and Gynecology, The University of Tokyo, Tokyo 113-8655, Japan
| | - Tomoyuki Fujii
- Department of Obstetrics and Gynecology, The University of Tokyo, Tokyo 113-8655, Japan
| | - Masabumi Shibuya
- Institute of Physiology and Medicine, Jobu University, Gunma 370-1393, Japan
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Schmidt V, Sieckmann T, Kirschner KM, Scholz H. WT1 regulates HOXB9 gene expression in a bidirectional way. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2021; 1864:194764. [PMID: 34508900 DOI: 10.1016/j.bbagrm.2021.194764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/09/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
The homeoboxB9 (HOXB9) gene is necessary for specification of the anterior-posterior body axis during embryonic development and expressed in various types of cancer. Here we show that the Wilms tumor transcription factor WT1 regulates the HOXB9 gene in a bidirectional manner. Silencing of WT1 activates HOXB9 in Wt1 expressing renal cell adenocarcinoma-derived 786-0 cells, mesonephric M15 cells and ex vivo cultured murine embryonic kidneys. In contrast, HOXB9 expression in U2OS osteosarcoma and human embryonic kidney (HEK) 293 cells, which lack endogenous WT1, is enhanced by overexpression of WT1. Consistently, Hoxb9 promoter activity is stimulated by WT1 in transiently transfected U2OS and HEK293 cells, but inhibited in M15 cells with CRISPR/Cas9-mediated Wt1 deletion. Electrophoretic mobility shift assay and chromatin immunoprecipitation demonstrate binding of WT1 to the HOXB9 promoter in WT1-overexpressing U2OS cells and M15 cells. BASP1, a transcriptional co-repressor of WT1, is associated with the HOXB9 promoter in the chromatin of these cell lines. Co-transfection of U2OS and HEK293 cells with BASP1 plus WT1 prevents the stimulatory effect of WT1 on the HOXB9 promoter. Our findings identify HOXB9 as a novel downstream target gene of WT1. Depending on the endogenous expression of WT1, forced changes in WT1 can either stimulate or repress HOXB9, and the inhibitory effect of WT1 on transcription of HOXB9 involves BASP1. Consistent with inhibition of Hoxb9 expression by WT1, both transcripts are distributed in an almost non-overlapping pattern in embryonic mouse kidneys. Regulation of HOXB9 expression by WT1 might become relevant during kidney development and cancer progression.
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Affiliation(s)
- Valentin Schmidt
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Tobias Sieckmann
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Karin M Kirschner
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, 10117 Berlin, Germany
| | - Holger Scholz
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, 10117 Berlin, Germany.
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Implications of the Wilms' Tumor Suppressor Wt1 in Cardiomyocyte Differentiation. Int J Mol Sci 2021; 22:ijms22094346. [PMID: 33919406 PMCID: PMC8122684 DOI: 10.3390/ijms22094346] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 12/11/2022] Open
Abstract
The Wilms’ tumor suppressor Wt1 is involved in multiple developmental processes and adult tissue homeostasis. The first phenotypes recognized in Wt1 knockout mice were developmental cardiac and kidney defects. Wt1 expression in the heart has been described in epicardial, endothelial, smooth muscle cells, and fibroblasts. Expression of Wt1 in cardiomyocytes has been suggested but remained a controversial issue, as well as the role of Wt1 in cardiomyocyte development and regeneration after injury. We determined cardiac Wt1 expression during embryonic development, in the adult, and after cardiac injury by quantitative RT-PCR and immunohistochemistry. As in vitro model, phenotypic cardiomyocyte differentiation, i.e., the appearance of rhythmically beating clones from mouse embryonic stem cells (mESCs) and associated changes in gene expression were analyzed. We detected Wt1 in cardiomyocytes from embryonic day (E10.5), the first time point investigated, until adult age. Cardiac Wt1 mRNA levels decreased during embryonic development. In the adult, Wt1 was reactivated in cardiomyocytes 48 h and 3 weeks following myocardial infarction. Wt1 mRNA levels were increased in differentiating mESCs. Overexpression of Wt1(-KTS) and Wt1(+KTS) isoforms in ES cells reduced the fraction of phenotypically cardiomyocyte differentiated clones, which was preceded by a temporary increase in c-kit expression in Wt1(-KTS) transfected ES cell clones and induction of some cardiomyocyte markers. Taken together, Wt1 shows a dynamic expression pattern during cardiomyocyte differentiation and overexpression in ES cells reduces their phenotypical cardiomyocyte differentiation.
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Zeng Z, Lei S, He Z, Chen T, Jiang J. YEATS2 is a target of HIF1α and promotes pancreatic cancer cell proliferation and migration. J Cell Physiol 2021; 236:2087-2098. [PMID: 32749678 DOI: 10.1002/jcp.29995] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 07/17/2020] [Accepted: 07/24/2020] [Indexed: 12/22/2022]
Abstract
Hypoxia is involved in the development of pancreatic cancer (PC). The responses of hypoxia-associated genes and their regulated mechanisms are largely unknown. In this study, through bioinformatic analysis and quantitative real-time polymerase chain reaction, the YEATS domain containing 2 (YEATS2) was determined to be a key hypoxia-associated gene. It was increased in PC cells under hypoxia, upregulated in PC tissues, and predicted poor outcome. YEATS2 inhibition decreased the proliferation and migration of PC cells under both normoxia and hypoxia in vitro as well as proliferation and metastasis in vivo. We found that hypoxia-inducible factor 1α (HIF1α) regulated the expression of YEATS2 via binding to the hypoxia response element (HRE) of YEATS2 and coexpressed with YEATS2 in PC tissues. Overexpression of YEATS2 blocked the inhibitory effects of HIF1α silence on PC cell proliferation and migration under hypoxia. Collectively, our study revealed that YEATS2 is a target gene of HIF1α and promotes PC development under hypoxia.
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Affiliation(s)
- Zhirui Zeng
- Department of Hepatobiliary Surgery, Renmin Hospital of Wuhan University, Wuhan, China
- Key Laboratory of Tissue Engineering and Stem Cell of Guizhou Province, Department of Physiology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, China
| | - Shan Lei
- Key Laboratory of Tissue Engineering and Stem Cell of Guizhou Province, Department of Physiology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, China
| | - Zhiwei He
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Tengxiang Chen
- Key Laboratory of Tissue Engineering and Stem Cell of Guizhou Province, Department of Physiology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, China
| | - Jianxin Jiang
- Department of Hepatobiliary Surgery, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive System Disease of Wuhan University, Wuhan, China
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Orlando IMC, Lafleur VN, Storti F, Spielmann P, Crowther L, Santambrogio S, Schödel J, Hoogewijs D, Mole DR, Wenger RH. Distal and proximal hypoxia response elements cooperate to regulate organ-specific erythropoietin gene expression. Haematologica 2020; 105:2774-2784. [PMID: 33256376 PMCID: PMC7716368 DOI: 10.3324/haematol.2019.236406] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/18/2019] [Indexed: 11/09/2022] Open
Abstract
While it is well-established that distal hypoxia response elements (HREs) regulate hypoxia-inducible factor (HIF) target genes such as erythropoietin (Epo), an interplay between multiple distal and proximal (promoter) HREs has not been described so far. Hepatic Epo expression is regulated by a HRE located downstream of the EPO gene, but this 3' HRE is dispensable for renal EPO gene expression. We previously identified a 5' HRE and could show that both HREs direct exogenous reporter gene expression. Here, we show that whereas in hepatic cells the 3' but not the 5' HRE is required, in neuronal cells both the 5' and 3' HREs contribute to endogenous Epo induction. Moreover, two novel putative HREs were identified in the EPO promoter. In hepatoma cells HIF interacted mainly with the distal 3' HRE, but in neuronal cells HIF most strongly bound the promoter, to a lesser extent the 3' HRE, and not at all the 5' HRE. Interestingly, mutation of either of the two distal HREs abrogated HIF binding to the 3' and promoter HREs. These results suggest that a canonical functional HRE can recruit multiple, not necessarily HIF, transcription factors to mediate HIF binding to different distant HREs in an organ-specific manner.
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Affiliation(s)
- Ilaria M. C. Orlando
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
| | | | - Federica Storti
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
| | - Patrick Spielmann
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
| | - Lisa Crowther
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
| | - Sara Santambrogio
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
| | - Johannes Schödel
- Department of Nephrology and Hypertension, Universitatsklinikum Erlangen, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany
| | - David Hoogewijs
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
- Department of Medicine/Physiology, University of Fribourg, Fribourg, Switzerland
| | - David R. Mole
- NDM Research Building, University of Oxford, Oxford, UK
| | - Roland H. Wenger
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- National Center of Competence in Research “Kidney.CH”, Zurich, Switzerland
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