1
|
Jo W, Kim M, Oh J, Kim CS, Park C, Yoon S, Lee C, Kim S, Nam D, Park J. MicroRNA-29 Ameliorates Fibro-Inflammation and Insulin Resistance in HIF1α-Deficient Obese Adipose Tissue by Inhibiting Endotrophin Generation. Diabetes 2022; 71:1746-1762. [PMID: 35167651 DOI: 10.2337/db21-0801] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 02/09/2022] [Indexed: 11/13/2022]
Abstract
Dysregulation of extracellular matrix proteins in obese adipose tissue (AT) induces systemic insulin resistance. The metabolic roles of type VI collagen and its cleavage peptide endotrophin in obese AT are well established. However, the mechanisms regulating endotrophin generation remain elusive. Herein, we identified that several endotrophin-containing peptides (pre-endotrophins) were generated from the COL6A3 chain in a stepwise manner for the efficient production of mature endotrophin, partly through the action of hypoxia-induced matrix metalloproteinases (MMPs), including MMP2, MMP9, and MMP16. Hypoxia is an upstream regulator of COL6A3 expression and the proteolytic processing that regulates endotrophin generation. Hypoxia-inducible factor 1α (HIF1α) and the hypoxia-associated suppression of microRNA-29 (miR-29) cooperatively control the levels of COL6A3 and MMPs, which are responsible for endotrophin generation in hypoxic ATs. Adipocyte-specific Hif1α knock-out (APN-HIF1αKO) mice fed a chronic high-fat diet exhibited the significant amelioration of both local fibro-inflammation in AT and systemic insulin resistance compared with their control littermates, partly through the inhibition of endotrophin generation. Strikingly, adenovirus-mediated miR-29 overexpression in the ATs of APN-HIF1αKO mice in obesity significantly decreased endotrophin levels, suggesting that miR-29, combined with HIF1α inhibition in AT, could be a promising therapeutic strategy for treating obesity and related metabolic diseases.
Collapse
|
2
|
Zhang B, Chen Y, Shi X, Zhou M, Bao L, Hatanpaa KJ, Patel T, DeBerardinis RJ, Wang Y, Luo W. Regulation of branched-chain amino acid metabolism by hypoxia-inducible factor in glioblastoma. Cell Mol Life Sci 2021; 78:195-206. [PMID: 32088728 PMCID: PMC8112551 DOI: 10.1007/s00018-020-03483-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/30/2019] [Accepted: 02/12/2020] [Indexed: 02/07/2023]
Abstract
Hypoxia-inducible factors (HIFs) mediate metabolic reprogramming in response to hypoxia. However, the role of HIFs in branched-chain amino acid (BCAA) metabolism remains unknown. Here we show that hypoxia upregulates mRNA and protein levels of the BCAA transporter LAT1 and the BCAA metabolic enzyme BCAT1, but not their paralogs LAT2-4 and BCAT2, in human glioblastoma (GBM) cell lines as well as primary GBM cells. Hypoxia-induced LAT1 protein upregulation is mediated by both HIF-1 and HIF-2 in GBM cells. Although both HIF-1α and HIF-2α directly bind to the hypoxia response element at the first intron of the human BCAT1 gene, HIF-1α is exclusively responsible for hypoxia-induced BCAT1 expression in GBM cells. Knockout of HIF-1α and HIF-2α significantly reduces glutamate labeling from BCAAs in GBM cells under hypoxia, which provides functional evidence for HIF-mediated reprogramming of BCAA metabolism. Genetic or pharmacological inhibition of BCAT1 inhibits GBM cell growth under hypoxia. Together, these findings uncover a previously unrecognized HIF-dependent metabolic pathway that increases GBM cell growth under conditions of hypoxic stress.
Collapse
Affiliation(s)
- Bo Zhang
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA
| | - Yan Chen
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA
| | - Xiaolei Shi
- Children's Medical Center Research Institute, UT Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Mi Zhou
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA
| | - Lei Bao
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA
| | - Kimmo J Hatanpaa
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA
| | - Toral Patel
- Department of Neurological Surgery, UT Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Neurology and Neurotherapeutics, UT Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ralph J DeBerardinis
- Children's Medical Center Research Institute, UT Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Yingfei Wang
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA.
- Department of Neurology and Neurotherapeutics, UT Southwestern Medical Center, Dallas, TX, 75390, USA.
| | - Weibo Luo
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390-9072, USA.
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, 75390, USA.
| |
Collapse
|
3
|
Kučić N, Rački V, Jurdana K, Marcelić M, Grabušić K. Immunometabolic phenotype of BV-2 microglia cells upon murine cytomegalovirus infection. J Neurovirol 2019; 25:496-507. [PMID: 31025265 DOI: 10.1007/s13365-019-00750-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/19/2019] [Accepted: 04/03/2019] [Indexed: 11/26/2022]
Abstract
Microglia are resident brain macrophages with key roles in development and brain homeostasis. Cytomegalovirus (CMV) readily infects microglia cells, even as a possible primary target of infection in development. Effects of CMV infection on a cellular level in microglia are still unclear; therefore, the aim of this research was to assess the immunometabolic changes of BV-2 microglia cells following the murine cytomegalovirus (MCMV) infection. In light of that aim, we established an in vitro model of ramified BV-2 microglia (BV-2∅FCS, inducible nitric oxide synthase (iNOSlow), arginase-1 (Arg-1high), mannose receptor CD206high, and hypoxia-inducible factor 1α (HIF-1αlow)) to better replicate the in vivo conditions by removing FCS from the cultivation media, while the cells cultivated in 10% FCS DMEM displayed an ameboid morphology (BV-2FCS high, iNOShigh, Arg-1low, CD206low, and HIF-1αhigh). Experiments were performed using both ramified and ameboid microglia, and both of them were permissive to productive viral infection. Our results indicate that MCMV significantly alters the immunometabolic phenotypic properties of BV-2 microglia cells through the manipulation of iNOS and Arg-1 expression patterns, along with an induction of a glycolytic shift in the infected cell cultures.
Collapse
MESH Headings
- Animals
- Arginase/genetics
- Arginase/immunology
- Cell Line
- Culture Media, Serum-Free/pharmacology
- Embryo, Mammalian
- Fibroblasts/immunology
- Fibroblasts/virology
- Gene Expression Regulation
- Herpesviridae Infections/genetics
- Herpesviridae Infections/immunology
- Herpesviridae Infections/virology
- Host-Pathogen Interactions/genetics
- Host-Pathogen Interactions/immunology
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/immunology
- Lectins, C-Type/deficiency
- Lectins, C-Type/genetics
- Lectins, C-Type/immunology
- Mannose Receptor
- Mannose-Binding Lectins/deficiency
- Mannose-Binding Lectins/genetics
- Mannose-Binding Lectins/immunology
- Mice
- Mice, Inbred BALB C
- Microglia/immunology
- Microglia/virology
- Models, Biological
- Muromegalovirus/genetics
- Muromegalovirus/growth & development
- Muromegalovirus/metabolism
- Nitric Oxide Synthase Type II/deficiency
- Nitric Oxide Synthase Type II/genetics
- Nitric Oxide Synthase Type II/immunology
- Primary Cell Culture
- Receptors, Cell Surface/deficiency
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/immunology
- Signal Transduction
Collapse
Affiliation(s)
- Natalia Kučić
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, Braće Branchetta 20, 51000, Rijeka, Croatia.
| | - Valentino Rački
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, Braće Branchetta 20, 51000, Rijeka, Croatia
| | - Kristina Jurdana
- Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, Rijeka, Croatia
| | - Marina Marcelić
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, Braće Branchetta 20, 51000, Rijeka, Croatia
| | - Kristina Grabušić
- Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, Rijeka, Croatia
| |
Collapse
|
4
|
Mirtschink P, Bischof C, Pham MD, Sharma R, Khadayate S, Rossi G, Fankhauser N, Traub S, Sossalla S, Hagag E, Berthonneche C, Sarre A, Stehr SN, Grote P, Pedrazzini T, Dimmeler S, Krek W, Krishnan J. Inhibition of the Hypoxia-Inducible Factor 1α-Induced Cardiospecific HERNA1 Enhance-Templated RNA Protects From Heart Disease. Circulation 2019; 139:2778-2792. [PMID: 30922078 PMCID: PMC6571183 DOI: 10.1161/circulationaha.118.036769] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Supplemental Digital Content is available in the text. Background: Enhancers are genomic regulatory elements conferring spatiotemporal and signal-dependent control of gene expression. Recent evidence suggests that enhancers can generate noncoding enhancer RNAs, but their (patho)biological functions remain largely elusive. Methods: We performed chromatin immunoprecipitation–coupled sequencing of histone marks combined with RNA sequencing of left ventricular biopsies from experimental and genetic mouse models of human cardiac hypertrophy to identify transcripts revealing enhancer localization, conservation with the human genome, and hypoxia-inducible factor 1α dependence. The most promising candidate, hypoxia-inducible enhancer RNA (HERNA)1, was further examined by investigating its capacity to modulate neighboring coding gene expression by binding to their gene promoters by using chromatin isolation by RNA purification and λN–BoxB tethering–based reporter assays. The role of HERNA1 and its neighboring genes for pathological stress–induced growth and contractile dysfunction, and the therapeutic potential of HERNA1 inhibition was studied in gapmer-mediated loss-of-function studies in vitro using human induced pluripotent stem cell–derived cardiomyocytes and various in vivo models of human pathological cardiac hypertrophy. Results: HERNA1 is robustly induced on pathological stress. Production of HERNA1 is initiated by direct hypoxia-inducible factor 1α binding to a hypoxia-response element in the histoneH3-lysine27acetylation marks–enriched promoter of the enhancer and confers hypoxia responsiveness to nearby genes including synaptotagmin XVII, a member of the family of membrane-trafficking and Ca2+-sensing proteins and SMG1, encoding a phosphatidylinositol 3-kinase–related kinase. Consequently, a substrate of SMG1, ATP-dependent RNA helicase upframeshift 1, is hyperphoshorylated in a HERNA1- and SMG1-dependent manner. In vitro and in vivo inactivation of SMG1 and SYT17 revealed overlapping and distinct roles in modulating cardiac hypertrophy. Finally, in vivo administration of antisense oligonucleotides targeting HERNA1 protected mice from stress-induced pathological hypertrophy. The inhibition of HERNA1 postdisease development reversed left ventricular growth and dysfunction, resulting in increased overall survival. Conclusions: HERNA1 is a novel heart-specific noncoding RNA with key regulatory functions in modulating the growth, metabolic, and contractile gene program in disease, and reveals a molecular target amenable to therapeutic exploitation.
Collapse
MESH Headings
- Animals
- Binding Sites
- Cardiomyopathy, Dilated/genetics
- Cardiomyopathy, Dilated/metabolism
- Cardiomyopathy, Dilated/pathology
- Cardiomyopathy, Dilated/prevention & control
- Cardiomyopathy, Hypertrophic/genetics
- Cardiomyopathy, Hypertrophic/metabolism
- Cardiomyopathy, Hypertrophic/pathology
- Cardiomyopathy, Hypertrophic/prevention & control
- Case-Control Studies
- Disease Models, Animal
- HEK293 Cells
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Oligonucleotides, Antisense/administration & dosage
- Promoter Regions, Genetic
- RNA, Untranslated/genetics
- RNA, Untranslated/metabolism
- Signal Transduction
- Von Hippel-Lindau Tumor Suppressor Protein/genetics
- Von Hippel-Lindau Tumor Suppressor Protein/metabolism
Collapse
Affiliation(s)
- Peter Mirtschink
- Institute of Molecular Health Sciences, ETH Zurich, Switzerland (P.M., G.R., N.F., S.T., W.K.)
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Dresden, Germany (P.M., E.H.)
| | - Corinne Bischof
- MRC Clinical Sciences Centre, Imperial College London, United Kingdom (C.B., S.K., J.K.)
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| | - Minh-Duc Pham
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| | - Rahul Sharma
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| | - Sanjay Khadayate
- MRC Clinical Sciences Centre, Imperial College London, United Kingdom (C.B., S.K., J.K.)
| | - Geetha Rossi
- Institute of Molecular Health Sciences, ETH Zurich, Switzerland (P.M., G.R., N.F., S.T., W.K.)
| | - Niklaus Fankhauser
- Institute of Molecular Health Sciences, ETH Zurich, Switzerland (P.M., G.R., N.F., S.T., W.K.)
| | - Shuyang Traub
- Institute of Molecular Health Sciences, ETH Zurich, Switzerland (P.M., G.R., N.F., S.T., W.K.)
| | - Samuel Sossalla
- Department of Internal Medicine III: Cardiology and Angiology, University of Kiel, Germany (S.S.)
- Klinik für Kardiologie und Pneumologie, Georg-August-Universität Goettingen and DZHK (German Centre for Cardiovascular Research) (S.S.)
| | - Eman Hagag
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Dresden, Germany (P.M., E.H.)
| | - Corinne Berthonneche
- Cardiovascular Assessment Facility, University of Lausanne and CHUV, Switzerland (C.B., A.S.)
| | - Alexandre Sarre
- Cardiovascular Assessment Facility, University of Lausanne and CHUV, Switzerland (C.B., A.S.)
| | - Sebastian. N. Stehr
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, and Department of Anesthesiology and Intensive Care Medicine, University Hospital Leipzig, Germany (S.N.S.)
| | - Phillip Grote
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| | - Thierry Pedrazzini
- Department of Medicine, University of Lausanne Medical School, Switzerland (T.P.)
| | - Stefanie Dimmeler
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| | - Wilhelm Krek
- Institute of Molecular Health Sciences, ETH Zurich, Switzerland (P.M., G.R., N.F., S.T., W.K.)
| | - Jaya Krishnan
- MRC Clinical Sciences Centre, Imperial College London, United Kingdom (C.B., S.K., J.K.)
- Institute of Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe-University Frankfurt, Germany (C.B., M.-D.P., R.S., P.G., S.D., J.K.)
| |
Collapse
|
5
|
Abstract
BACKGROUND Deficiency of hypoxia-induced factor-1α (HIF-1α) in macrophages reduced lipopolysaccharide (LPS)-induced mortality; however, whether HIF-1α expression in myeloid cells would contribute to the development of Escherichia coli (E. coli) or LPS-induced acute lung injury (ALI) is less investigated. AIM To test whether deletion of Hif1α in myeloid cells affects E. coli or LPS-induced ALI and to elicit the underlying mechanisms. DESIGN Laboratory study. METHODS We intratracheally challenged Hif1αfl/fl and Hif1αfl/flLysMCre mice with E. coli or LPS to analyze lung and spleen inflammatory responses. Flow cytometry was used to analyze the changes of α7 nAChR+CD11b+ cells in the lung and spleen. Double knockout of Chrna7 and Itgam mice were used to examine expression of HIF-1α during E. coli lung infection. Vagotomy was performed to demonstrate the role of vagus nerve in mediating protective effects of deletion of Hif1α in myeloid cells on LPS-induced ALI. RESULTS Deletion of Hif1α in myeloid cells could reduce lung edema, inflammatory cell infiltration, and lung and BAL inflammatory cytokines in E. coli-induced ALI. Flow cytometric analysis revealed that α7 nAChR+CD11b+ cells in the lung and spleen were markedly increased in E. coli-challenged Hif1αfl/flLysMCre mice compared with E. coli-challenged Hif1αfl/fl mice. Double knockout of Chrna7 and Itgam increased HIF-1α expression in lung and spleen cells during lung E. coli infection. Vagotomy abolished the protective effect of deletion of Hif1α in myeloid cells on LPS-induced ALI. CONCLUSION Deletion of Hif1α in myeloid cells could protect mice from lung injury depending on α7 nAChR+CD11b+ cells and innervation of vagal circuits.
Collapse
Affiliation(s)
- Y Huang
- From the Key Laboratory of Molecular Virology & Immunology, Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - C Zhao
- From the Key Laboratory of Molecular Virology & Immunology, Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - J Chen
- From the Key Laboratory of Molecular Virology & Immunology, Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - X Su
- From the Key Laboratory of Molecular Virology & Immunology, Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| |
Collapse
|
6
|
Li D, Du Y, Yuan X, Han X, Dong Z, Chen X, Wu H, Zhang J, Xu L, Han C, Zhang M, Xia Q. Hepatic hypoxia-inducible factors inhibit PPARα expression to exacerbate acetaminophen induced oxidative stress and hepatotoxicity. Free Radic Biol Med 2017; 110:102-116. [PMID: 28583670 DOI: 10.1016/j.freeradbiomed.2017.06.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 05/31/2017] [Accepted: 06/01/2017] [Indexed: 01/25/2023]
Abstract
Oxidative stress has a critical role in the pathogenesis of acetaminophen (APAP) induced hepatocellular necrosis, and the identification of novel approaches to attenuate oxidative stress is essential to prevent/revert the disease. This study investigated the role of both HIF-1 and HIF-2 in the pathogenesis of APAP-induced oxidative stress, as well as the underlying mechanisms. In the present study, we initially found that knockout of HIF-1α or HIF-2α reduced APAP toxicity, and double knockout afforded the best protection. APAP treatment led to stabilization of both HIF-1α and HIF-2α in mouse livers. Moreover, the protective effects of HIF deficiency were related to the attenuated oxidative stress. Further experiments proved that PPARα, a master regulator in cellular metabolism accounted for the HIF deficiency-caused protective impact on APAP toxicity. Inactivation of HIFs promoted the expression of peroxisome proliferator-activated receptor α (PPARα) in the liver, which in turn activated nuclear factor erythroid 2-related factor 2 (Nrf2). Knockdown of PPARα or Nrf2 negated the hepatoprotection afforded by HIF deficiency. At last,examination of the PPARα promoter identified a HIF-binding site and HIF-dependent repression of PPARα in hepatocytes by luciferase reporter and EMSA study. Taken together, Our results demonstrate that HIFs are key suppressors of PPARα in the liver, thereby compromising the adaptive defense mechanisms against oxidative stress when confronted with APAP. These findings are important to the etiology and therapeutics of APAP hepatotoxicity. The functional link between HIFs and PPARα may have more implications in liver physiology and other pathologic conditions than APAP injury.
Collapse
Affiliation(s)
- Dawei Li
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yingdong Du
- Department of Hepatic Surgery, PLA No.107 hospital, Yantai, China
| | - Xiaodong Yuan
- Department of Urology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoxiao Han
- Department of Biomaterials, School of Material, University of Manchester, United Kingdom
| | - Zhen Dong
- Transplantation Center of the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaosong Chen
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Haoyu Wu
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jianjun Zhang
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Longmei Xu
- The Central Laboratory of Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Conghui Han
- Department of Urology, Xuzhou Central Hospital, Xuzhou Medical University School of Clinical Medicine, Xuzhou, China
| | - Ming Zhang
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Qiang Xia
- Department of Transplantation and Hepatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| |
Collapse
|
7
|
Bohuslavova R, Cerychova R, Nepomucka K, Pavlinkova G. Renal injury is accelerated by global hypoxia-inducible factor 1 alpha deficiency in a mouse model of STZ-induced diabetes. BMC Endocr Disord 2017; 17:48. [PMID: 28774305 PMCID: PMC5543752 DOI: 10.1186/s12902-017-0200-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 07/31/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Hypoxia inducible factor 1 (HIF-1) activates protective pathways to counteract hypoxia and prevent tissue damage in conjunction with renal injury. The aim of this study was to evaluate a role of HIF-1 in diabetes-induced kidney damage. METHODS We used a streptozotocin-induced diabetes mouse model and compared biochemical, histological and molecular parameters associated with kidney damage in Hif1α deficient (Hif1α +/- ) and wild-type mice. RESULTS We showed that Hif1α deficiency accelerated pathological changes in the early stage of DN. Six weeks after diabetes-induction, Hif1α deficient mice showed more prominent changes in biochemical serum parameters associated with glomerular injury, increased expression of podocyte damage markers, and loss of podocytes compared to wild-type mice. These results indicate that Hif1α deficiency specifically affects podocyte survival in the early phase of DN, resulting in diabetic glomerular injury. In contrast, renal fibrosis was not affected by the global reduction of Hif1α, at least not in the early phase of diabetic exposure. CONCLUSIONS Together our data reveal that HIF-1 has an essential role in the early response to prevent diabetes-induced tissue damage and that impaired HIF-1 signaling results in a faster progression of DN. Although the modulation of HIF-1 activity is a high-priority target for clinical treatments, further study is required to investigate HIF-1 as a potential therapeutic target for the treatment of DN.
Collapse
Affiliation(s)
- Romana Bohuslavova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology CAS, BIOCEV, Center of Excellence, Prumyslova 595, Vestec, 25242 Czechia
| | - Radka Cerychova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology CAS, BIOCEV, Center of Excellence, Prumyslova 595, Vestec, 25242 Czechia
- Faculty of Science, Charles University, Prague, Czechia
| | - Katerina Nepomucka
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology CAS, BIOCEV, Center of Excellence, Prumyslova 595, Vestec, 25242 Czechia
| | - Gabriela Pavlinkova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology CAS, BIOCEV, Center of Excellence, Prumyslova 595, Vestec, 25242 Czechia
| |
Collapse
|
8
|
Liu Z, Li C, Meng X, Bai Y, Qi J, Wang J, Zhou Q, Zhang W, Zhang X. Hypoxia-inducible factor-lα mediates aggrecan and collagen Π expression via NOTCH1 signaling in nucleus pulposus cells during intervertebral disc degeneration. Biochem Biophys Res Commun 2017; 488:554-561. [PMID: 28526405 DOI: 10.1016/j.bbrc.2017.05.086] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 05/15/2017] [Indexed: 12/17/2022]
Abstract
Although hypoxia-inducible factor-lα (HIF-lα) has been reported to have an important role in the metabolism and synthesis of the extracellular matrix (ECM) of nucleus pulposus cells (NPCs), the underlying mechanism has not been fully clarified. Here, we show for the first time that NOTCH1 expression is decreased in NPs isolated from degenerated human intervertebral discs (IVDs), as well as in the NPs of NP-specific HIF-1α-/- mice. Our study reveals that overexpression of HIF-1α leads to increased expression of NOTCH1, the NOTCH1 ligand JAGGED1, and its target gene hairy and enhancer of split-1 (HES1), while also upregulating collagen Π and aggrecan expression in human NPCs. Importantly, these changes in expression are significantly suppressed by the NOTCH1 inhibitor DAPT. In parallel with changes in collagen Π and aggrecan expression, inhibition of the HIF-1α-NOTCH1 pathway altered ECM turnover by suppressing expression of the matrix metalloproteinases MMP1 and MMP13, while increasing the expression of tissue inhibitor of metalloproteinase-1 (TIMP1). Lastly, activation of NOTCH1 via JAGGED1 in human NPCs isolated from degenerated IVDs restored collagen Π and aggrecan expression. Therefore, our study shows that HIF-1α regulates collagen Π and aggrecan expression through NOTCH1 signaling and implicate NOTCH1 as a potential therapeutic target in disc degeneration.
Collapse
MESH Headings
- Adolescent
- Adult
- Aged
- Aggrecans/antagonists & inhibitors
- Aggrecans/genetics
- Aggrecans/metabolism
- Animals
- Cells, Cultured
- Collagen Type II/antagonists & inhibitors
- Collagen Type II/genetics
- Collagen Type II/metabolism
- Diamines/pharmacology
- Dose-Response Relationship, Drug
- Female
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/antagonists & inhibitors
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Intervertebral Disc Degeneration/metabolism
- Male
- Mice
- Mice, Knockout
- Middle Aged
- Nucleus Pulposus/cytology
- Nucleus Pulposus/drug effects
- Nucleus Pulposus/metabolism
- Receptor, Notch1/antagonists & inhibitors
- Receptor, Notch1/genetics
- Receptor, Notch1/metabolism
- Signal Transduction/drug effects
- Signal Transduction/genetics
- Structure-Activity Relationship
- Thiazoles/pharmacology
- Young Adult
Collapse
Affiliation(s)
- Zhuochao Liu
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Changwei Li
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiangchao Meng
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yunting Bai
- Department of Orthopedics, The Fifth People's Hospital of Jinan, Jinan, China
| | - Jin Qi
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jun Wang
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qi Zhou
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weibin Zhang
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
| | - Xingkai Zhang
- Department of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
| |
Collapse
|
9
|
Sarrazy V, Viaud M, Westerterp M, Ivanov S, Giorgetti-Peraldi S, Guinamard R, Gautier EL, Thorp EB, De Vivo DC, Yvan-Charvet L. Disruption of Glut1 in Hematopoietic Stem Cells Prevents Myelopoiesis and Enhanced Glucose Flux in Atheromatous Plaques of ApoE(-/-) Mice. Circ Res 2016; 118:1062-77. [PMID: 26926469 PMCID: PMC4824305 DOI: 10.1161/circresaha.115.307599] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 02/29/2016] [Indexed: 02/06/2023]
Abstract
RATIONALE Inflamed atherosclerotic plaques can be visualized by noninvasive positron emission and computed tomographic imaging with (18)F-fluorodeoxyglucose, a glucose analog, but the underlying mechanisms are poorly understood. OBJECTIVE Here, we directly investigated the role of Glut1-mediated glucose uptake in apolipoprotein E-deficient (ApoE(-/-)) mouse model of atherosclerosis. METHODS AND RESULTS We first showed that the enhanced glycolytic flux in atheromatous plaques of ApoE(-/-) mice was associated with the enhanced metabolic activity of hematopoietic stem and multipotential progenitor cells and higher Glut1 expression in these cells. Mechanistically, the regulation of Glut1 in ApoE(-/-) hematopoietic stem and multipotential progenitor cells was not because of alterations in hypoxia-inducible factor 1α signaling or the oxygenation status of the bone marrow but was the consequence of the activation of the common β subunit of the granulocyte-macrophage colony-stimulating factor/interleukin-3 receptor driving glycolytic substrate utilization by mitochondria. By transplanting bone marrow from WT, Glut1(+/-), ApoE(-/-), and ApoE(-/-)Glut1(+/-) mice into hypercholesterolemic ApoE-deficient mice, we found that Glut1 deficiency reversed ApoE(-/-) hematopoietic stem and multipotential progenitor cell proliferation and expansion, which prevented the myelopoiesis and accelerated atherosclerosis of ApoE(-/-) mice transplanted with ApoE(-/-) bone marrow and resulted in reduced glucose uptake in the spleen and aortic arch of these mice. CONCLUSIONS We identified that Glut1 connects the enhanced glucose uptake in atheromatous plaques of ApoE(-/-) mice with their myelopoiesis through regulation of hematopoietic stem and multipotential progenitor cell maintenance and myelomonocytic fate and suggests Glut1 as potential drug target for atherosclerosis.
Collapse
MESH Headings
- Animals
- Aorta, Thoracic/metabolism
- Apolipoproteins E/deficiency
- Bone Marrow Transplantation
- Cell Division
- Cytokine Receptor Common beta Subunit/physiology
- Disease Progression
- Energy Metabolism
- Gene Expression Regulation
- Glucose/metabolism
- Glucose Transporter Type 1/deficiency
- Glucose Transporter Type 1/physiology
- Glycolysis
- Hematopoietic Stem Cells/metabolism
- Hypercholesterolemia/genetics
- Hypercholesterolemia/metabolism
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/physiology
- Metformin/pharmacology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Multipotent Stem Cells/metabolism
- Myelopoiesis/physiology
- Plaque, Atherosclerotic/metabolism
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Receptors, Interleukin-3/antagonists & inhibitors
- Receptors, Interleukin-3/physiology
- Spleen/metabolism
- Tyrphostins/pharmacology
Collapse
Affiliation(s)
- Vincent Sarrazy
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Manon Viaud
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Marit Westerterp
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Stoyan Ivanov
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Sophie Giorgetti-Peraldi
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Rodolphe Guinamard
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Emmanuel L Gautier
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Edward B Thorp
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Darryl C De Vivo
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.)
| | - Laurent Yvan-Charvet
- From the Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France (V.S., M.V., S.I., S.G.-P., R.G., L.Y.-C.); Division of Molecular Medicine, Department of Medicine (M.W.) and Department of Neurology (D.C.D.V.), Columbia University, New York, NY; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR_S 1166, Hôpital de la Pitié, Paris, France (E.L.G.); Pierre & Marie Curie University, Université Paris 06, Paris, France (E.L.G.); Institute of Cardiometabolism and Nutrition (ICAN), Boulevard de l'Hôpital, Paris, France (E.L.G.); and Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, IL (E.B.T.).
| |
Collapse
|
10
|
Hu F, Liu H, Xu L, Li Y, Liu X, Shi L, Su Y, Qiu X, Zhang X, Yang Y, Zhang J, Li Z. Hypoxia-inducible factor-1α perpetuates synovial fibroblast interactions with T cells and B cells in rheumatoid arthritis. Eur J Immunol 2015; 46:742-51. [PMID: 26604208 DOI: 10.1002/eji.201545784] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 10/16/2015] [Accepted: 11/17/2015] [Indexed: 01/12/2023]
Affiliation(s)
- Fanlei Hu
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Hongjiang Liu
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Liling Xu
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Yingni Li
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Xu Liu
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Lianjie Shi
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Yin Su
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Xiaoyan Qiu
- Department of Immunology, School of Basic Medical Science, Peking University, Beijing, China
| | - Xia Zhang
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Yuqin Yang
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Jian Zhang
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| |
Collapse
|
11
|
Saini Y, Proper SP, Dornbos P, Greenwood KK, Kopec AK, Lynn SG, Grier E, Burgoon LD, Zacharewski TR, Thomas RS, Harkema JR, LaPres JJ. Loss of Hif-2α Rescues the Hif-1α Deletion Phenotype of Neonatal Respiratory Distress In Mice. PLoS One 2015; 10:e0139270. [PMID: 26422241 PMCID: PMC4589293 DOI: 10.1371/journal.pone.0139270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 09/09/2015] [Indexed: 01/10/2023] Open
Abstract
Hypoxia is a state of decreased oxygen reaching the tissues of the body. During prenatal development, the fetus experiences localized occurrences of hypoxia that are essential for proper organogenesis and survival. The response to decreased oxygen availability is primarily regulated by hypoxia-inducible factors (HIFs), a family of transcription factors that modulate the expression of key genes involved in glycolysis, angiogenesis, and erythropoiesis. HIF-1α and HIF-2α, two key isoforms, are important in embryonic development, and likely are involved in lung morphogenesis. We have recently shown that the inducible loss of Hif-1α in lung epithelium starting at E4.5 leads to death within an hour of parturition, with symptoms similar to neonatal respiratory distress syndrome (RDS). In addition to Hif-1α, Hif-2α is also expressed in the developing lung, although the overlapping roles of Hif-1α and Hif-2α in this context are not fully understood. To further investigate the independent role of Hif-2α in lung epithelium and its ability to alter Hif-1α-mediated lung maturation, we generated two additional lung-specific inducible Hif-α knockout models (Hif-2α and Hif-1α+Hif-2α). The intrauterine loss of Hif-2α in the lungs does not lead to decreased viability or observable phenotypic changes in the lung. More interestingly, survivability observed after the loss of both Hif-1α and Hif-2α suggests that the loss of Hif-2α is capable of rescuing the neonatal RDS phenotype seen in Hif-1α-deficient pups. Microarray analyses of lung tissue from these three genotypes identified several factors, such as Scd1, Retlnγ, and Il-1r2, which are differentially regulated by the two HIF-α isoforms. Moreover, network analysis suggests that modulation of hormone-mediated, NF-κB, C/EBPα, and c-MYC signaling are central to HIF-mediated changes in lung development.
Collapse
Affiliation(s)
- Yogesh Saini
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Genetics Program, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Steven P. Proper
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
- College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, United States of America
| | - Peter Dornbos
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Krista K. Greenwood
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Anna K. Kopec
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Scott G. Lynn
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Elizabeth Grier
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Lyle D. Burgoon
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Timothy R. Zacharewski
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
| | - Russell S. Thomas
- The Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, United States of America
| | - Jack R. Harkema
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
- Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, Michigan, United States of America
| | - John J. LaPres
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan, United States of America
- Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, Michigan, United States of America
- * E-mail:
| |
Collapse
|
12
|
Merceron C, Mangiavini L, Robling A, Wilson TL, Giaccia AJ, Shapiro IM, Schipani E, Risbud MV. Loss of HIF-1α in the notochord results in cell death and complete disappearance of the nucleus pulposus. PLoS One 2014; 9:e110768. [PMID: 25338007 PMCID: PMC4206488 DOI: 10.1371/journal.pone.0110768] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 09/23/2014] [Indexed: 01/08/2023] Open
Abstract
The intervertebral disc (IVD) is one of the largest avascular organs in vertebrates. The nucleus pulposus (NP), a highly hydrated and proteoglycan-enriched tissue, forms the inner portion of the IVD. The NP is surrounded by a multi-lamellar fibrocartilaginous structure, the annulus fibrosus (AF). This structure is covered superior and inferior side by cartilaginous endplates (CEP). The NP is a unique tissue within the IVD as it results from the differentiation of notochordal cells, whereas, AF and CEP derive from the sclerotome. The hypoxia inducible factor-1α (HIF-1α) is expressed in NP cells but its function in NP development and homeostasis is largely unknown. We thus conditionally deleted HIF-1α in notochordal cells and investigated how loss of this transcription factor impacts NP formation and homeostasis at E15.5, birth, 1 and 4 months of age, respectively. Histological analysis, cell lineage studies, and TUNEL assay were performed. Morphologic changes of the mutant NP cells were identified as early as E15.5, followed, postnatally, by the progressive disappearance and replacement of the NP with a novel tissue that resembles fibrocartilage. Notably, lineage studies and TUNEL assay unequivocally proved that NP cells did not transdifferentiate into chondrocyte-like cells but they rather underwent massive cell death, and were completely replaced by a cell population belonging to a lineage distinct from the notochordal one. Finally, to evaluate the functional consequences of HIF-1α deletion in the NP, biomechanical testing of mutant IVD was performed. Loss of the NP in mutant mice significantly reduced the IVD biomechanical properties by decreasing its ability to absorb mechanical stress. These findings are similar to the changes usually observed during human IVD degeneration. Our study thus demonstrates that HIF-1α is essential for NP development and homeostasis, and it raises the intriguing possibility that this transcription factor could be involved in IVD degeneration in humans.
Collapse
Affiliation(s)
- Christophe Merceron
- Department of Orthopaedic Surgery, Medical School, University of Michigan, Ann Arbor, Michigan, United States of America
- Inserm, UMRS 791-LIOAD, Centre for Osteoarticular and Dental Tissue Engineering, Group STEP ‘Skeletal Tissue Engineering and Physiopathology’, Nantes, France
- LUNAM, Nantes University, Faculty of Dental Surgery, Nantes, France
| | - Laura Mangiavini
- Department of Orthopaedic Surgery, Medical School, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Orthopaedic and Traumatology, Milano-Bicocca University, Monza (MB), Italy
| | - Alexander Robling
- School of Medicine, Department of Anatomy and Cell Biology, Indiana University, Indianapolis, Indiana, United States of America
| | - Tremika LeShan Wilson
- Department of Orthopaedic Surgery, Medical School, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Amato J. Giaccia
- School of Medicine, Department of Radiation Oncology, Division of Radiation and Cancer Biology, Stanford University, Stanford, California, United States of America
| | - Irving M. Shapiro
- Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Ernestina Schipani
- Department of Orthopaedic Surgery, Medical School, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Medicine, Division of Endocrinology, Medical School, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail: (MVR); (ES)
| | - Makarand V. Risbud
- Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
- * E-mail: (MVR); (ES)
| |
Collapse
|
13
|
Kapitsinou PP, Sano H, Michael M, Kobayashi H, Davidoff O, Bian A, Yao B, Zhang MZ, Harris RC, Duffy KJ, Erickson-Miller CL, Sutton TA, Haase VH. Endothelial HIF-2 mediates protection and recovery from ischemic kidney injury. J Clin Invest 2014; 124:2396-409. [PMID: 24789906 DOI: 10.1172/jci69073] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The hypoxia-inducible transcription factors HIF-1 and HIF-2 mediate key cellular adaptions to hypoxia and contribute to renal homeostasis and pathophysiology; however, little is known about the cell type-specific functions of HIF-1 and HIF-2 in response to ischemic kidney injury. Here, we used a genetic approach to specifically dissect the roles of endothelial HIF-1 and HIF-2 in murine models of hypoxic kidney injury induced by ischemia reperfusion or ureteral obstruction. In both models, inactivation of endothelial HIF increased injury-associated renal inflammation and fibrosis. Specifically, inactivation of endothelial HIF-2α, but not endothelial HIF-1α, resulted in increased expression of renal injury markers and inflammatory cell infiltration in the postischemic kidney, which was reversed by blockade of vascular cell adhesion molecule-1 (VCAM1) and very late antigen-4 (VLA4) using monoclonal antibodies. In contrast, pharmacologic or genetic activation of HIF via HIF prolyl-hydroxylase inhibition protected wild-type animals from ischemic kidney injury and inflammation; however, these same protective effects were not observed in HIF prolyl-hydroxylase inhibitor-treated animals lacking endothelial HIF-2. Taken together, our data indicate that endothelial HIF-2 protects from hypoxia-induced renal damage and represents a potential therapeutic target for renoprotection and prevention of fibrosis following acute ischemic injury.
Collapse
|
14
|
Kihira Y, Miyake M, Hirata M, Hoshina Y, Kato K, Shirakawa H, Sakaue H, Yamano N, Izawa-Ishizawa Y, Ishizawa K, Ikeda Y, Tsuchiya K, Tamaki T, Tomita S. Deletion of hypoxia-inducible factor-1α in adipocytes enhances glucagon-like peptide-1 secretion and reduces adipose tissue inflammation. PLoS One 2014; 9:e93856. [PMID: 24705496 PMCID: PMC3976326 DOI: 10.1371/journal.pone.0093856] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Accepted: 03/08/2014] [Indexed: 01/14/2023] Open
Abstract
It is known that obese adipose tissues are hypoxic and express hypoxia-inducible factor (HIF)-1α. Although some studies have shown that the expression of HIF-1α in adipocytes induces glucose intolerance, the mechanisms are still not clear. In this study, we examined its effects on the development of type 2 diabetes by using adipocyte-specific HIF-1α knockout (ahKO) mice. ahKO mice showed improved glucose tolerance compared with wild type (WT) mice. Macrophage infiltration and mRNA levels of monocyte chemotactic protein-1 (MCP-1) and tumor necrosis factor α (TNFα) were decreased in the epididymal adipose tissues of high fat diet induced obese ahKO mice. The results indicated that the obesity-induced adipose tissue inflammation was suppressed in ahKO mice. In addition, in the ahKO mice, serum insulin levels were increased under the free-feeding but not the fasting condition, indicating that postprandial insulin secretion was enhanced. Serum glucagon-like peptide-1 (GLP-1) levels were also increased in the ahKO mice. Interestingly, adiponectin, whose serum levels were increased in the obese ahKO mice compared with the obese WT mice, stimulated GLP-1 secretion from cultured intestinal L cells. Therefore, insulin secretion may have been enhanced through the adiponectin-GLP-1 pathway in the ahKO mice. Our results suggest that the deletion of HIF-1α in adipocytes improves glucose tolerance by enhancing insulin secretion through the GLP-1 pathway and by reducing macrophage infiltration and inflammation in adipose tissue.
Collapse
Affiliation(s)
- Yoshitaka Kihira
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Mariko Miyake
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Manami Hirata
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
- Student Laboratory, Faculty of Medicine, The University of Tokushima, Tokushima, Japan
| | - Yoji Hoshina
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
- Student Laboratory, Faculty of Medicine, The University of Tokushima, Tokushima, Japan
| | - Kana Kato
- Laboratory of Nutrition, Graduate School of Agricultural Science, Tohoku University, Miyagi, Japan
| | - Hitoshi Shirakawa
- Laboratory of Nutrition, Graduate School of Agricultural Science, Tohoku University, Miyagi, Japan
| | - Hiroshi Sakaue
- Department of Nutrition and Metabolism, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Noriko Yamano
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yuki Izawa-Ishizawa
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Keisuke Ishizawa
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yasumasa Ikeda
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Toshiaki Tamaki
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Shuhei Tomita
- Division of Molecular Pharmacology, Faculty of Medicine, Tottori University, Tottori, Japan
- * E-mail:
| |
Collapse
|
15
|
Wang J, Dong FF, Li XF, Shu B, Shi Q, Wang YJ, Zhou CJ. [Effects of Yiqi Huayu prescription on knee cartilage degeneration in HIF-1alpha gene knockout mice]. Zhongguo Gu Shang 2013; 26:486-492. [PMID: 24015654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To study the role of hypoxia-inducible factor 1 alpha (HIF1alpha) on knee cartilage degeneration,and to explore the effects and mechanisms of Chinese herbal compound Yiqi Huayu prescription on HIF-1alpha gene knockout mice on knee cartilage degeneration. METHODS The 4-month and 6-month HIF-1alpha gene knock out mice were obtained by interbreeding, and divided into HIF-1alpha +/+ 4-month mice group,HIF-1alpha -/- 4-month mice group,HIF-1alpha +/+ 6-month mice group and HIF-1alpha -/- 6-month mice group, 3 mice in each group. And then the 2-month-old HIF-1alpha gene knock out mice were randomly divided into Yiqi Huayu prescription group and physiological saline group. There were 6 mice in each group. After 2 months' drug administration, the knee joint of mice was collected, and the Mankin score were evaluated; Safranine-fast green staining, HE Staining, and immunohistochemistry analysis for VEGF, Col X, Col II, MMP-13 and Sox-9 were performed erespectively. RESULTS (1) Compared to the results in the HIF-1alpha+/+ mice groups, the HIF-1alpha-/- mice developed aging related cartilage loss and bony tissue appearance, cartilage defects increased,and cells reduced. In HIF-1alpha-/-4-month mice and 6-month mice group, the expresion of Col II and Sox9 decreased, and the expression of Col X, MMP-13 and VEGF increased. (2) Compared to the physiological saline group, the ossification and defect of knee joint cartilage reduced of mice in the Yiqi Huayu prescription group, the cartilage cell distribution was more uniform, and the total number of cells increased. The expression of type II collagen and Sox9 protein increased, expression of Col X, MMP-13 and VEGF protein decreased of mice in the Yiqi Huayu prescription group. CONCLUSION The knee cartilage degenerates in the HIF-1alpha cKO mice, and the degeneration increased with age adding. The Yiqi Huayu prescription can delay the degeneration of knee cartilage of HIF-1alpha cKO mice.
Collapse
Affiliation(s)
- Jing Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | | | | | | | | | | | | |
Collapse
|
16
|
Crotty Alexander LE, Akong-Moore K, Feldstein S, Johansson P, Nguyen A, McEachern EK, Nicatia S, Cowburn AS, Olson J, Cho JY, Isaacs H, Johnson RS, Broide DH, Nizet V. Myeloid cell HIF-1α regulates asthma airway resistance and eosinophil function. J Mol Med (Berl) 2013; 91:637-44. [PMID: 23250618 PMCID: PMC3646920 DOI: 10.1007/s00109-012-0986-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/09/2012] [Accepted: 12/02/2012] [Indexed: 01/10/2023]
Abstract
Hypoxia-inducible factor (HIF)-1α is a master regulator of inflammatory activities of myeloid cells, including neutrophils and macrophages. These studies examine the role of myeloid cell HIF-1α in regulating asthma induction and pathogenesis, and for the first time, evaluate the roles of HIF-1α and HIF-2α in the chemotactic properties of eosinophils, the myeloid cells most associated with asthma. Wild-type (WT) and myeloid cell-specific HIF-1α knockout (KO) C57BL/6 mice were studied in an ovalbumin (OVA) model of asthma. Administration of the pharmacological HIF-1α antagonist YC-1 was used to corroborate findings from the genetic model. WT, HIF-1α, and HIF-2α KO eosinophils underwent in vitro chemotaxis assays. We found that deletion of HIF-1α in myeloid cells and systemic treatment with YC-1 during asthma induction decreased airway hyperresponsiveness (AHR). Deletion of HIF-1α in myeloid cells in OVA-induced asthma also reduced eosinophil infiltration, goblet cell hyperplasia, and levels of cytokines IL-4, IL-5, and IL-13 in the lung. HIF-1α inhibition with YC-1 during asthma induction decreased eosinophilia in bronchoalveolar lavage, lung parenchyma, and blood, as well as decreased total lung inflammation, IL-5, and serum OVA-specific IgE levels. Deletion of HIF-1α in eosinophils decreased their chemotaxis, while deletion of the isoform HIF-2α led to increased chemotaxis. This work demonstrates that HIF-1α in myeloid cells plays a role in asthma pathogenesis, particularly in AHR development. Additionally, treatment with HIF-1α inhibitors during asthma induction decreases AHR and eosinophilia. Finally, we show that HIF-1α and HIF-2α regulate eosinophil migration in opposing ways.
Collapse
Affiliation(s)
- Laura E Crotty Alexander
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System, La Jolla, CA, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Georgiev P, Belikoff BB, Hatfield S, Ohta A, Sitkovsky MV, Lukashev D. Genetic deletion of the HIF-1α isoform I.1 in T cells enhances antibacterial immunity and improves survival in a murine peritonitis model. Eur J Immunol 2013; 43:655-66. [PMID: 23208786 PMCID: PMC3757952 DOI: 10.1002/eji.201242765] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 11/07/2012] [Accepted: 11/29/2012] [Indexed: 12/30/2022]
Abstract
Hypoxia-adenosinergic suppression and redirection of the immune response has been implicated in the regulation of antipathogen and antitumor immunity, with hypoxia-inducible factor 1α (HIF-1α) playing a major role. In this study, we investigated the role of isoform I.1, a quantitatively minor alternative isoform of HIF-1α, in antibacterial immunity and sepsis survival. By using the cecal ligation and puncture model of bacterial peritonitis, we studied the function of I.1 isoform in T cells using mice with total I.1 isoform deficiency and mice with T-cell-targeted I.1 knockdown. We found that genetic deletion of the I.1 isoform resulted in enhanced resistance to septic lethality, significantly reduced bacterial load in peripheral blood, increased M1 macrophage polarization, augmented levels of proinflammatory cytokines in serum, and significantly decreased levels of the anti-inflammatory cytokine IL-10. Our data suggest a previously unrecognized immunosuppressive role for the I.1 isoform in T cells during bacterial sepsis. We interpret these data as indicative that the activation-inducible isoform I.1 hinders the contribution of T cells to the antibacterial response by affecting M1/M2 macrophage polarization and microbicidal function.
Collapse
Affiliation(s)
- Peter Georgiev
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| | - Bryan B. Belikoff
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| | - Stephen Hatfield
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| | - Akio Ohta
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| | - Michail V. Sitkovsky
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| | - Dmitry Lukashev
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, Massachusetts, USA
| |
Collapse
|
18
|
Skuli N, Majmundar AJ, Krock BL, Mesquita RC, Mathew LK, Quinn ZL, Runge A, Liu L, Kim MN, Liang J, Schenkel S, Yodh AG, Keith B, Simon MC. Endothelial HIF-2α regulates murine pathological angiogenesis and revascularization processes. J Clin Invest 2012; 122:1427-43. [PMID: 22426208 PMCID: PMC3314446 DOI: 10.1172/jci57322] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 02/03/2012] [Indexed: 12/12/2022] Open
Abstract
Localized tissue hypoxia is a consequence of vascular compromise or rapid cellular proliferation and is a potent inducer of compensatory angiogenesis. The oxygen-responsive transcriptional regulator hypoxia-inducible factor 2α (HIF-2α) is highly expressed in vascular ECs and, along with HIF-1α, activates expression of target genes whose products modulate vascular functions and angiogenesis. However, the mechanisms by which HIF-2α regulates EC function and tissue perfusion under physiological and pathological conditions are poorly understood. Using mice in which Hif2a was specifically deleted in ECs, we demonstrate here that HIF-2α expression is required for angiogenic responses during hindlimb ischemia and for the growth of autochthonous skin tumors. EC-specific Hif2a deletion resulted in increased vessel formation in both models; however, these vessels failed to undergo proper arteriogenesis, resulting in poor perfusion. Analysis of cultured HIF-2α-deficient ECs revealed cell-autonomous increases in migration, invasion, and morphogenetic activity, which correlated with HIF-2α-dependent expression of specific angiogenic factors, including delta-like ligand 4 (Dll4), a Notch ligand, and angiopoietin 2. By stimulating Dll4 signaling in cultured ECs or restoring Dll4 expression in ischemic muscle tissue, we rescued most of the HIF-2α-dependent EC phenotypes in vitro and in vivo, emphasizing the critical role of Dll4/Notch signaling as a downstream target of HIF-2α in ECs. These results indicate that HIF-1α and HIF-2α fulfill complementary, but largely nonoverlapping, essential functions in pathophysiological angiogenesis.
Collapse
MESH Headings
- Adaptor Proteins, Signal Transducing
- Angiopoietin-2/genetics
- Angiopoietin-2/physiology
- Animals
- Basic Helix-Loop-Helix Transcription Factors/deficiency
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/physiology
- Calcium-Binding Proteins
- Cell Hypoxia
- Cell Movement
- Cells, Cultured/cytology
- Collateral Circulation/physiology
- Endothelial Cells/metabolism
- Hindlimb/blood supply
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/physiology
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/physiology
- Ischemia/physiopathology
- Membrane Proteins/genetics
- Membrane Proteins/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Neovascularization, Pathologic/physiopathology
- Neovascularization, Physiologic/physiology
- Receptors, Notch/physiology
- Recombinant Fusion Proteins/physiology
- Recovery of Function
- Skin Neoplasms/blood supply
- Skin Neoplasms/chemically induced
- Wound Healing/physiology
Collapse
Affiliation(s)
- Nicolas Skuli
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Amar J. Majmundar
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bryan L. Krock
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Rickson C. Mesquita
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Lijoy K. Mathew
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zachary L. Quinn
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Anja Runge
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Liping Liu
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Meeri N. Kim
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jiaming Liang
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Steven Schenkel
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Arjun G. Yodh
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Brian Keith
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - M. Celeste Simon
- Howard Hughes Medical Institute,
Abramson Family Cancer Research Institute,
School of Medicine,
Department of Physics and Astronomy,
Department of Cancer Biology, and
Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| |
Collapse
|
19
|
Nishiyama Y, Goda N, Kanai M, Niwa D, Osanai K, Yamamoto Y, Senoo-Matsuda N, Johnson RS, Miura S, Kabe Y, Suematsu M. HIF-1α induction suppresses excessive lipid accumulation in alcoholic fatty liver in mice. J Hepatol 2012; 56:441-7. [PMID: 21896344 DOI: 10.1016/j.jhep.2011.07.024] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 07/22/2011] [Accepted: 07/25/2011] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Chronic alcohol intake stimulates hepatic oxygen consumption and subsequently causes liver hypoxia, leading to activation of hypoxia inducible factor-1 (HIF-1). Although HIF-1 plays a crucial role in the metabolic switch from aerobic to anaerobic metabolism in response to hypoxia, its roles in the regulation of lipid metabolism in alcoholic fatty liver remain unknown. METHODS Wild-type and hepatocyte-specific HIF-1α-null mice were subjected to a 6% ethanol-containing liquid diet for 4 weeks, and functional effects of loss of the HIF-1α gene on lipid metabolism were examined in the liver. RESULTS Hepatocyte-specific HIF-1α-null mice developed severe hypertriglyceridemia with enhanced accumulation of lipids in the liver of mice exposed to a 6% ethanol-containing liquid diet for 4 weeks. Sterol regulatory element-binding protein 1c (SREBP-1c) and its downstream target acetyl-CoA carboxylase were greatly activated as the hepatic steatosis progressed, and these alterations were inversely correlated with the expression of the HIF-1-regulated gene DEC1. Overexpression of DEC1 in the mutant liver abrogated the detrimental effects of loss of HIF-1α gene on ethanol-induced fatty liver with reduced SREBP-1c expression. Conversely, co-administration of the HIF hydroxylase inhibitor dimethyloxalylglycine for the last 2 weeks improved markedly the ethanol-induced fatty liver in mice. CONCLUSIONS The current results provide direct evidence for protective roles of HIF-1 induction in the development of ethanol-induced fatty liver via activation of the HIF-1-regulated transcriptional repressor DEC1.
Collapse
Affiliation(s)
- Yasumasa Nishiyama
- Department of Biochemistry, School of Medicine, Keio University, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Lin M, Chen Y, Jin J, Hu Y, Zhou KK, Zhu M, Le YZ, Ge J, Johnson RS, Ma JX. Ischaemia-induced retinal neovascularisation and diabetic retinopathy in mice with conditional knockout of hypoxia-inducible factor-1 in retinal Müller cells. Diabetologia 2011; 54:1554-66. [PMID: 21360191 PMCID: PMC6592825 DOI: 10.1007/s00125-011-2081-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 01/19/2011] [Indexed: 12/22/2022]
Abstract
AIMS/HYPOTHESIS Retinal Müller cells are known to produce inflammatory and angiogenic cytokines, which play important roles in diabetic retinopathy. Hypoxia-inducible factor (HIF)-1 has been shown to play a crucial role in retinal inflammation and neovascularisation. We sought to determine the role of Müller cell-derived HIF-1 in oxygen-induced retinopathy (OIR) and diabetic retinopathy using conditional Hif-1α (also known as Hif1a) knockout (KO) mice. METHODS Conditional Hif-1α KO mice were generated by crossing mice expressing cyclisation recombinase (cre, also known as P1_gp003) in Müller cells with floxed Hif-1α mice and used for OIR and streptozotocin-induced diabetes to induce retinal neovascularisation and inflammation, respectively. Abundance of HIF-1α and pro-angiogenic and pro-inflammatory factors was measured by immunoblotting and immunohistochemistry. Retinal neovascularisation was visualised by angiography and quantified by counting pre-retinal nuclei. Retinal inflammation was evaluated by leucostasis and vascular leakage. RESULTS While the Hif-1α KO mice showed significantly decreased HIF-1α levels in the retina, they exhibited no apparent histological or visual functional abnormalities under normal conditions. Compared with wild-type counterparts, Hif-1α KO mice with OIR demonstrated attenuated overproduction of vascular endothelial growth factor (VEGF) and intercellular adhesion molecule (ICAM)-1, reduced vascular leakage and alleviated neovascularisation in the retina. Under diabetes conditions, disruption of Hif-1α in Müller cells attenuated the increases of retinal vascular leakage and adherent leucocytes, as well as the overproduction of VEGF and ICAM-1. CONCLUSIONS/INTERPRETATION Müller cell-derived HIF-1α is a key mediator of retinal neovascularisation, vascular leakage and inflammation, the major pathological changes in diabetic retinopathy. Müller cell-derived HIF-1α is therefore a promising therapeutic target for diabetic retinopathy.
Collapse
Affiliation(s)
- M Lin
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Rey S, Luo W, Shimoda LA, Semenza GL. Metabolic reprogramming by HIF-1 promotes the survival of bone marrow-derived angiogenic cells in ischemic tissue. Blood 2011; 117:4988-98. [PMID: 21389314 PMCID: PMC3100705 DOI: 10.1182/blood-2010-11-321190] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Accepted: 03/01/2011] [Indexed: 01/17/2023] Open
Abstract
A major obstacle to using bone marrow cell-based therapies for ischemic cardiovascular disease is that transplanted cells must survive in an ischemic microenvironment characterized by low oxygen, glucose, and pH. We demonstrate that treatment of bone marrow-derived angiogenic cells (BMDACs) with dimethyloxalylglycine, an α-ketoglutarate antagonist that induces hypoxia-inducible factor 1 (HIF-1) activity, results in metabolic reprogramming of these cells, with increased glucose uptake, decreased O(2) consumption, increased lactate production, decreased reactive oxygen species, and increased intracellular pH. These effects are dependent on HIF-1, which transactivates target genes encoding metabolic enzymes and membrane transporters. Dimethyloxalylglycine-treated BMDACs have a significant survival advantage under conditions of low O(2) and low pH ex vivo and in ischemic tissue. Combined HIF-1α-based gene and cell therapy reduced tissue necrosis even when BMDAC donors and ischemic recipient mice were 17 months old, suggesting that this approach may have therapeutic utility in elderly patients with critical limb ischemia.
Collapse
Affiliation(s)
- Sergio Rey
- Institute for Cell Engineering, Johns Hopkins University Schoolof Medicine, Baltimore, MD, USA
| | | | | | | |
Collapse
|
22
|
Mazumdar J, O'Brien WT, Johnson RS, LaManna JC, Chavez JC, Klein PS, Simon MC. O2 regulates stem cells through Wnt/β-catenin signalling. Nat Cell Biol 2010; 12:1007-13. [PMID: 20852629 PMCID: PMC3144143 DOI: 10.1038/ncb2102] [Citation(s) in RCA: 359] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Accepted: 08/25/2010] [Indexed: 02/06/2023]
Abstract
Stem cells reside in specialized microenvironments or 'niches' that regulate their function. In vitro studies using hypoxic culture conditions (<5% O2) have revealed strong regulatory links between O2 availability and functions of stem and precursor cells. Although some stem cells are perivascular, others may occupy hypoxic niches and be regulated by O2 gradients. However, the underlying mechanisms remain unclear. Here, we show that hypoxia inducible factor-1α (HIF-1α), a principal mediator of hypoxic adaptations, modulates Wnt/β-catenin signalling in hypoxic embryonic stem (ES) cells by enhancing β-catenin activation and expression of the downstream effectors LEF-1 and TCF-1. This regulation extends to primary cells, including isolated neural stem cells (NSCs), and is not observed in differentiated cells. In vivo, Wnt/β-catenin activity is closely associated with low O2 regions in the subgranular zone of the hippocampus, a key NSC niche. Hif-1α deletion impairs hippocampal Wnt-dependent processes, including NSC proliferation, differentiation and neuronal maturation. This decline correlates with reduced Wnt/β-catenin signalling in the subgranular zone. O2 availability, therefore, may have a direct role in stem cell regulation through HIF-1α modulation of Wnt/β-catenin signalling.
Collapse
Affiliation(s)
- Jolly Mazumdar
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, U C San Diego, La Jolla, CA 92093
- Howard Hughes Medical Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - W. Timothy O'Brien
- Division of Hematology-Oncology, University of Pennsylvania School of Medicine, U C San Diego, La Jolla, CA 92093
| | | | - Joseph C. LaManna
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio 44106
| | - Juan C. Chavez
- Translational Medicine, Wyeth Research, Collegeville, Pennsylvania, PA 19426
| | - Peter S. Klein
- Division of Hematology-Oncology, University of Pennsylvania School of Medicine, U C San Diego, La Jolla, CA 92093
| | - M. Celeste Simon
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, U C San Diego, La Jolla, CA 92093
- Howard Hughes Medical Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Address correspondence to: M. Celeste. Simon, Ph.D. Abramson Family Cancer Research Institute University of Pennsylvania BRB II/III, Room 456 421 Curie Boulevard Philadelphia, PA 19104 Telephone: (215) 746-5532 Fax:(215)746-5511 ()
| |
Collapse
|
23
|
Rodríguez-Prados JC, Través PG, Cuenca J, Rico D, Aragonés J, Martín-Sanz P, Cascante M, Boscá L. Substrate fate in activated macrophages: a comparison between innate, classic, and alternative activation. J Immunol 2010; 185:605-14. [PMID: 20498354 DOI: 10.4049/jimmunol.0901698] [Citation(s) in RCA: 711] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Macrophages play a relevant role in innate and adaptive immunity depending on the balance of the stimuli received. From an analytical and functional point of view, macrophage stimulation can be segregated into three main modes, as follows: innate, classic, and alternative pathways. These differential activations result in the expression of specific sets of genes involved in the release of pro- or anti-inflammatory stimuli. In the present work, we have analyzed whether specific metabolic patterns depend on the signaling pathway activated. A [1,2-(13)C(2)]glucose tracer-based metabolomics approach has been used to characterize the metabolic flux distributions in macrophages stimulated through the classic, innate, and alternative pathways. Using this methodology combined with mass isotopomer distribution analysis of the new formed metabolites, the data show that activated macrophages are essentially glycolytic cells, and a clear cutoff between the classic/innate activation and the alternative pathway exists. Interestingly, macrophage activation through LPS/IFN-gamma or TLR-2, -3, -4, and -9 results in similar flux distribution patterns regardless of the pathway activated. However, stimulation through the alternative pathway has minor metabolic effects. The molecular basis of the differences between these two types of behavior involves a switch in the expression of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK2) from the liver type-PFK2 to the more active ubiquitous PFK2 isoenzyme, which responds to Hif-1alpha activation and increases fructose-2,6-bisphosphate concentration and the glycolytic flux. However, using macrophages targeted for Hif-1alpha, the switch of PFK2 isoenzymes still occurs in LPS/IFN-gamma-activated macrophages, suggesting that this pathway regulates ubiquitous PFK2 expression through Hif-1alpha-independent mechanisms.
Collapse
MESH Headings
- Animals
- Cells, Cultured
- Enzyme Activation/genetics
- Enzyme Activation/immunology
- Gene Expression Profiling
- Glycolysis/genetics
- Glycolysis/immunology
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Immunity, Innate/genetics
- Isoenzymes/metabolism
- Isoenzymes/physiology
- Macrophage Activation/genetics
- Macrophage Activation/immunology
- Macrophages, Peritoneal/enzymology
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Phosphofructokinase-2/metabolism
- Phosphofructokinase-2/physiology
- Signal Transduction/genetics
- Signal Transduction/immunology
- Substrate Specificity/genetics
- Substrate Specificity/immunology
Collapse
Affiliation(s)
- Juan-Carlos Rodríguez-Prados
- Department of Biochemistry and Molecular Biology, Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Kurobe H, Urata M, Ueno M, Ueki M, Ono S, Izawa-Ishizawa Y, Fukuhara Y, Lei Y, Ripen AM, Kanbara T, Aihara KI, Ishizawa K, Akaike M, Gonzalez FJ, Tamaki T, Takahama Y, Yoshizumi M, Kitagawa T, Tomita S. Role of hypoxia-inducible factor 1alpha in T cells as a negative regulator in development of vascular remodeling. Arterioscler Thromb Vasc Biol 2009; 30:210-7. [PMID: 20007912 DOI: 10.1161/atvbaha.109.192666] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE Recent studies have shown that the cellular immune response in the development of vascular remodeling modulates the resulting pathological alterations. We show that hypoxia-inducible factor 1 (Hif-1) (specifically expressed in T cells) is involved in the immune response to vascular remodeling that accompanies arteriosclerosis. METHODS AND RESULTS To study the role of T cells in the development of vascular remodeling, femoral arterial injury induced by an external vascular polyethylene cuff was examined in mice lacking Hif-1 (specifically in T cells). We found that cuff placement caused prominent neointimal hyperplasia of the femoral artery in Hif-1- (T-cell)-deficient mice compared with that in control mice and that infiltration of inflammatory cells at the adventitia was markedly increased in the mutant mice. Studies to clarify the mechanism of augmented vascular remodeling in the mutant mice showed enhanced production of cytokines by activated T cells and augmented antibody production in response to a T-dependent antigen in the mutant mice. CONCLUSIONS The results of this study revealed that Hif-1alpha in T cells plays a crucial role in vascular inflammation and remodeling in response to cuff injury as a negative regulator of T cell-mediated immune response. Potential new therapeutic strategies that target Hif-1alpha are described.
Collapse
Affiliation(s)
- Hirotsugu Kurobe
- epartment of Cardiovascular Surgery, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Owings RA, Boerma M, Wang J, Berbee M, Laderoute KR, Soderberg LSF, Vural E, Jensen MH. Selective deficiency of HIF-1alpha in myeloid cells influences secondary intention wound healing in mouse skin. In Vivo 2009; 23:879-884. [PMID: 20023228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND Hypoxia-inducible factor-1 (HIF-1) influences myeloid cell function. In this study we examined the role of myeloid cell HIF-1alpha on wound healing in vivo using a cell-specific knockout (KO) mouse model. MATERIALS AND METHODS HIF-1alpha KO mice and wild-type (WT) controls received 8 mm full thickness dorsal dermal wounds. Wound dimensions were measured until full closure. Tissue was obtained from 3-day-old wounds for (immuno-)histochemical analysis. Production of interleukin-1beta (IL-1beta) and nitric oxide (NO) in response to lipopolysaccharide (LPS) and/or desferrioxamine (DFX) was examined in vitro. RESULTS Early wound closure occurred significantly faster in HIF-1alpha KO mice than in WT mice. Wounds of KO mice contained similar numbers of neutrophils and macrophages, but more activated keratinocytes, consistent with accelerated re-epithelialization. Interestingly, while LPS and LPS+DFX elicited a similar IL-1beta response in macrophages from the 2 mouse types, NO production was blunted in HIF-1alpha KO macrophages. CONCLUSION Absence of HIF-1alpha in myeloid cells accelerates the early phase of secondary intention wound healing in vivo. This may be associated with a deficient ability of myeloid cells to initiate an appropriate NO production response. Pharmacologic modulators of HIF-1alpha should be explored in situations with abnormal wound healing.
Collapse
Affiliation(s)
- Richard A Owings
- Department of Pathology, University of Arkanas for Medical Sciences, Little Rock, AR, USA
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Ouyang W, Zhang D, Li J, Verma UN, Costa M, Huang C. Soluble and insoluble nickel compounds exert a differential inhibitory effect on cell growth through IKKalpha-dependent cyclin D1 down-regulation. J Cell Physiol 2009; 218:205-14. [PMID: 18792914 PMCID: PMC2605425 DOI: 10.1002/jcp.21590] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It is well-known that insoluble nickel compounds possess much more potent carcinogenic activities as compared with soluble nickel compounds. Although it is assumed that the different entry and clearance rate are responsible for the difference, the mechanisms underlying the different carcinogenic activities are still not well understood yet. In the present study, we found that exposure to soluble, but not insoluble nickel compounds, caused a significant inhibition of cell growth and G1/G0 cell cycle arrest, which was concomitant with a marked down-regulation of cylin D1, an essential nuclear protein for controlling G1/S transition, while both soluble and insoluble nickel compounds showed similar effects on NFkappaB activation, HIF-1alpha protein accumulation and TNF-alpha transcription and CAP43 protein expression at same doses range. The down-regulation of cyclin D1 is due to protein degradation rather than inhibition of transcription, because the nickel compounds treatment did not change cyclin D1 mRNA level, while MG132, the proteasome inhibitor, can rescue the degradation of cyclin D1 caused by soluble nickel compound. Moreover, the soluble nickel-induced cyclin D1 degradation is dependent on its Thr286 residue and requires IKKalpha, but not HIF-1alpha, which are both reported to be involved in cyclin D1 down-regulation. Taken together, we demonstrate that soluble, but not insoluble nickel compound, is able to cause cyclin D1 degradation and a cell growth arrest in an IKKalpha-dependent manner. Given the role of cyclin D1 and cell proliferation in carcinogenesis, we anticipate that the different effects of soluble and insoluble nickel compounds on cyclin D1 degradation and cell growth arrest may at least partially account for their different carcinogenic activities.
Collapse
Affiliation(s)
- Weiming Ouyang
- Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987
| | - Dongyun Zhang
- Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987
| | - Jingxia Li
- Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987
| | - Udit N. Verma
- Department of Medicine, Division of Hematology/Oncology, Utah Southwestern Medical Center at Dallas, Dallas, Texas 75390
| | - Max Costa
- Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987
| | - Chuanshu Huang
- Nelson Institute of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987
| |
Collapse
|
27
|
Murphy BJ, Kimura T, Sato BG, Shi Y, Andrews GK. Metallothionein induction by hypoxia involves cooperative interactions between metal-responsive transcription factor-1 and hypoxia-inducible transcription factor-1alpha. Mol Cancer Res 2008; 6:483-90. [PMID: 18337454 DOI: 10.1158/1541-7786.mcr-07-0341] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Mammalian metallothionein (MT) genes are transcriptionally activated by the essential metal zinc as well as by environmental stresses, including toxic metal overload and redox fluctuations. In addition to playing a key role in zinc homeostasis, MT proteins can protect against metal- and oxidant-induced cellular damage, and may participate in other fundamental physiologic and pathologic processes such as cell survival, proliferation, and neoplasia. Previously, our group reported a requirement for metal-responsive transcription factor-1 (MTF-1) in hypoxia-induced transcription of mouse MT-I and human MT-IIA genes. Here, we provide evidence that the protumorigenic hypoxia-inducible transcription factor-1alpha (HIF-1alpha) is essential for induction of MT-1 by hypoxia, but not zinc. Chromatin immunoprecipitation assays revealed that MTF-1 and HIF-1alpha are both recruited to the mouse MT-I promoter in response to hypoxia, but not zinc. In the absence of HIF-1alpha, MTF-1 is recruited to the MT-I promoter but fails to activate MT-I gene expression in response to hypoxia. Thus, HIF-1alpha seems to function as a coactivator of MT-I gene transcription by interacting with MTF-1 during hypoxia. Coimmunoprecipitation studies suggest interaction between MTF-1 and HIF-1alpha, either directly or as mediated by other factors. It is proposed that association of these important transcription factors in a multiprotein complex represents a common strategy to control unique sets of hypoxia-inducible genes in both normal and diseased tissue.
Collapse
Affiliation(s)
- Brian J Murphy
- Biosciences Division, SRI International, Menlo Park, CA 94025, USA.
| | | | | | | | | |
Collapse
|
28
|
Du R, Lu KV, Petritsch C, Liu P, Ganss R, Passegué E, Song H, VandenBerg S, Johnson RS, Werb Z, Bergers G. HIF1alpha induces the recruitment of bone marrow-derived vascular modulatory cells to regulate tumor angiogenesis and invasion. Cancer Cell 2008; 13:206-20. [PMID: 18328425 PMCID: PMC2643426 DOI: 10.1016/j.ccr.2008.01.034] [Citation(s) in RCA: 860] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 11/26/2007] [Accepted: 01/29/2008] [Indexed: 12/12/2022]
Abstract
Development of hypoxic regions is an indicator of poor prognosis in many tumors. Here, we demonstrate that HIF1alpha, the direct effector of hypoxia, partly through increases in SDF1alpha, induces recruitment of bone marrow-derived CD45+ myeloid cells containing Tie2+, VEGFR1+, CD11b+, and F4/80+ subpopulations, as well as endothelial and pericyte progenitor cells to promote neovascularization in glioblastoma. MMP-9 activity of bone marrow-derived CD45+ cells is essential and sufficient to initiate angiogenesis by increasing VEGF bioavailability. In the absence of HIF1alpha, SDF1alpha levels decrease, and fewer BM-derived cells are recruited to the tumors, decreasing MMP-9 and mobilization of VEGF. VEGF also directly regulates tumor cell invasiveness. When VEGF activity is impaired, tumor cells invade deep into the brain in the perivascular compartment.
Collapse
MESH Headings
- Animals
- Antigens, Differentiation/metabolism
- Benzylamines
- Bone Marrow Cells/enzymology
- Bone Marrow Cells/immunology
- Bone Marrow Transplantation
- Brain Neoplasms/blood supply
- Brain Neoplasms/enzymology
- Brain Neoplasms/pathology
- Cell Hypoxia
- Cell Line
- Cell Movement
- Chemokine CXCL12/metabolism
- Cyclams
- Endothelial Cells/enzymology
- Glioblastoma/blood supply
- Glioblastoma/enzymology
- Glioblastoma/pathology
- Heterocyclic Compounds/pharmacology
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Leukocyte Common Antigens/metabolism
- Matrix Metalloproteinase 9/deficiency
- Matrix Metalloproteinase 9/genetics
- Matrix Metalloproteinase 9/metabolism
- Mice
- Mice, Knockout
- Monocytes/enzymology
- Neoplasm Invasiveness
- Neovascularization, Pathologic/enzymology
- Neovascularization, Pathologic/pathology
- Pericytes/enzymology
- Receptor, TIE-2/metabolism
- Receptors, CXCR4/antagonists & inhibitors
- Receptors, CXCR4/metabolism
- Signal Transduction
- Transduction, Genetic
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor A/metabolism
- Vascular Endothelial Growth Factor Receptor-1/metabolism
Collapse
Affiliation(s)
- Rose Du
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- Department of Neurological Surgery, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - Kan V. Lu
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Claudia Petritsch
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Patty Liu
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Ruth Ganss
- Western Australian Institute for Medical Research, Perth WA 6000, Australia
| | - Emmanuelle Passegué
- Department of Developmental and Stem Cell Biology, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Hanqiu Song
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Scott VandenBerg
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- Department of Pathology, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Randall S. Johnson
- Molecular Biology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Zena Werb
- Department of Anatomy, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Gabriele Bergers
- Department of Neurological Surgery, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- Brain Tumor Research Center, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
- Correspondence:
| |
Collapse
|
29
|
Abstract
Small numbers of proangiogenic bone marrow-derived cells (BMDCs) can play pivotal roles in tumor progression. In this issue of Cancer Cell, two papers, utilizing different tumor angiogenesis models, both find that activated MMP-9 delivered by BMDCs modulates neovessel remodeling, thereby promoting tumor growth. The changes in microvascular anatomy induced by MMP-9-expressing BMDCs are strikingly different between the preirradiated tumor vascular bed model employed by Ahn and Brown and the invasive glioblastoma model utilized by Du et al., likely mirroring the complexity of the real tumor microenvironment and the intricacy of roles of different BMDC populations in mediating tumor neoangiogenesis.
Collapse
MESH Headings
- Angiogenic Proteins/metabolism
- Animals
- Bone Marrow Cells/enzymology
- Bone Marrow Transplantation
- Cell Hypoxia
- Cell Movement
- Endothelial Cells/enzymology
- Glioblastoma/blood supply
- Glioblastoma/enzymology
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Matrix Metalloproteinase 9/deficiency
- Matrix Metalloproteinase 9/genetics
- Matrix Metalloproteinase 9/metabolism
- Mice
- Mice, Knockout
- Monocytes/enzymology
- Monocytes/transplantation
- Myeloid Cells/enzymology
- Myeloid Cells/transplantation
- Neoplasm Invasiveness
- Neoplasms, Experimental/blood supply
- Neoplasms, Experimental/enzymology
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/therapy
- Neovascularization, Pathologic/enzymology
- Neovascularization, Pathologic/pathology
- Neovascularization, Pathologic/prevention & control
- Signal Transduction
- Stem Cells/enzymology
- Time Factors
Collapse
Affiliation(s)
- Marco Seandel
- Howard Hughes Medical Institute, Ansary Center for Stem Cell Therapeutics, Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065, USA
- Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
- Correspondence: (M.S.), (S.R.)
| | - Jason Butler
- Howard Hughes Medical Institute, Ansary Center for Stem Cell Therapeutics, Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - David Lyden
- Howard Hughes Medical Institute, Ansary Center for Stem Cell Therapeutics, Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - Shahin Rafii
- Howard Hughes Medical Institute, Ansary Center for Stem Cell Therapeutics, Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065, USA
- Correspondence: (M.S.), (S.R.)
| |
Collapse
|
30
|
Srinivasan S, Bolick DT, Lukashev D, Lappas C, Sitkovsky M, Lynch KR, Hedrick CC. Sphingosine-1-phosphate reduces CD4+ T-cell activation in type 1 diabetes through regulation of hypoxia-inducible factor short isoform I.1 and CD69. Diabetes 2008; 57:484-93. [PMID: 18003758 DOI: 10.2337/db07-0855] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Non-obese diabetic (NOD) mice develop spontaneous type 1 diabetes. We have shown that sphingosine-1-phosphate (S1P) reduces activation of NOD diabetic endothelium via the S1P1 receptor. In the current study, we tested the hypothesis that S1P could inhibit CD4(+) T-cell activation, further reducing inflammatory events associated with diabetes. RESEARCH DESIGN AND METHODS CD4(+) T-cells were isolated from diabetic and nondiabetic NOD mouse splenocytes and treated in the absence or presence of S1P or the S1P1 receptor-specific agonist, SEW2871. Lymphocyte activation was examined using flow cytometry, cytokine bead assays, and a lymphocyte:endothelial adhesion assay. RESULTS Diabetic T-cells secreted twofold more gamma-interferon (IFN-gamma) and interleukin-17 than nondiabetic lymphocytes. Pretreatment with either S1P or SEW2871 significantly reduced cytokine secretion by approximately 50%. Flow cytometry analysis showed increased expression of CD69, a marker of lymphocyte activation, on diabetic T-cells. Both S1P and SEW2871 prevented upregulation of CD69 on CD4(+) cells. Quantitative RT-PCR showed that lymphocytes from diabetic NOD mice had 2.5-fold lower hypoxia-inducible factor (HIF)-1alpha short isoform I.1 (HIF1alphaI.1) mRNA levels than control. HIF1alphaI.1 is a negative regulator of lymphocyte activation. S1P significantly increased HIF1alpha I.1 mRNA levels in both control and diabetic groups. IFN-gamma production and surface CD69 expression was significantly increased in lymphocytes of HIF1alphaI.1-deficient mice. S1P did not reduce either CD69 or IFN-gamma expression in lymphocytes from HIF1alphaI.1-deficient mice. CONCLUSIONS S1P acts through the S1P1 receptor and HIF1alpha I.1 to negatively regulate T-cell activation, providing a potential therapeutic target for prevention of diabetes and its vascular complications.
Collapse
MESH Headings
- Animals
- Antigens, CD/drug effects
- Antigens, CD/immunology
- Antigens, Differentiation, T-Lymphocyte/drug effects
- Antigens, Differentiation, T-Lymphocyte/immunology
- Cytokines/immunology
- Diabetes Mellitus, Type 1/immunology
- Diabetes Mellitus, Type 1/prevention & control
- Diabetic Angiopathies/prevention & control
- Flow Cytometry
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Lectins, C-Type
- Lymphocyte Activation/drug effects
- Lysophospholipids/therapeutic use
- Mice
- Mice, Inbred NOD
- Mice, Knockout
- RNA, Small Interfering/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Sphingosine/analogs & derivatives
- Sphingosine/therapeutic use
- Spleen/immunology
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
Collapse
Affiliation(s)
- Suseela Srinivasan
- Cardiovascular Research Center, University of Virginia, P.O. Box 801394, 415 Lane Rd., MR5, Rm. G123, Charlottesville, VA 22908, USA
| | | | | | | | | | | | | |
Collapse
|
31
|
Hu CJ, Sataur A, Wang L, Chen H, Simon MC. The N-terminal transactivation domain confers target gene specificity of hypoxia-inducible factors HIF-1alpha and HIF-2alpha. Mol Biol Cell 2007; 18:4528-42. [PMID: 17804822 PMCID: PMC2043574 DOI: 10.1091/mbc.e06-05-0419] [Citation(s) in RCA: 283] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The basic helix-loop-helix-Per-ARNT-Sim-proteins hypoxia-inducible factor (HIF)-1alpha and HIF-2alpha are the principal regulators of the hypoxic transcriptional response. Although highly related, they can activate distinct target genes. In this study, the protein domain and molecular mechanism important for HIF target gene specificity are determined. We demonstrate that although HIF-2alpha is unable to activate multiple endogenous HIF-1alpha-specific target genes (e.g., glycolytic enzymes), HIF-2alpha still binds to their promoters in vivo and activates reporter genes derived from such targets. In addition, comparative analysis of the N-terminal DNA binding and dimerization domains of HIF-1alpha and HIF-2alpha does not reveal any significant differences between the two proteins. Importantly, replacement of the N-terminal transactivation domain (N-TAD) (but not the DNA binding domain, dimerization domain, or C-terminal transactivation domain [C-TAD]) of HIF-2alpha with the analogous region of HIF-1alpha is sufficient to convert HIF-2alpha into a protein with HIF-1alpha functional specificity. Nevertheless, both the N-TAD and C-TAD are important for optimal HIF transcriptional activity. Additional experiments indicate that the ETS transcription factor ELK is required for HIF-2alpha to activate specific target genes such as Cited-2, EPO, and PAI-1. These results demonstrate that the HIF-alpha TADs, particularly the N-TADs, confer HIF target gene specificity, by interacting with additional transcriptional cofactors.
Collapse
Affiliation(s)
| | - Aneesa Sataur
- Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104; and
| | - Liyi Wang
- Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104; and
| | - Hongqing Chen
- Department of Craniofacial Biology, University of Colorado at Denver and Health Sciences Center, Aurora, CO 80045
| | - M. Celeste Simon
- *Abramson Family Cancer Research Institute and
- Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104; and
| |
Collapse
|
32
|
Ben-Shoshan M, Amir S, Dang DT, Dang LH, Weisman Y, Mabjeesh NJ. 1alpha,25-dihydroxyvitamin D3 (Calcitriol) inhibits hypoxia-inducible factor-1/vascular endothelial growth factor pathway in human cancer cells. Mol Cancer Ther 2007; 6:1433-9. [PMID: 17431122 DOI: 10.1158/1535-7163.mct-06-0677] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In vitro and in vivo studies have shown that 1alpha,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)] inhibits angiogenesis in cancer. We now examined whether the antiangiogenic effects of 1,25(OH)(2)D(3) are mediated by the hypoxia-inducible factor (HIF)-1 pathway. Our results showed that 1,25(OH)(2)D(3) reduces the protein expression of both the regulated HIF-1alpha subunit and the vascular endothelial growth factor (VEGF) in various human cancer cells. 1,25(OH)(2)D(3) also inhibited HIF-1 transcriptional activity (measured by reporter gene assay) as well as HIF-1 target genes, including VEGF, ET-1, and Glut-1. We also showed that 1,25(OH)(2)D(3) inhibits cell proliferation under hypoxia. Using HIF-1alpha knockout colon cancer cells, we show that the inhibition of the hypoxia-induced VEGF by 1,25(OH)(2)D(3) is mediated through a HIF-dependent pathway. Because HIF-1 is a major positive contributor in human tumorigenesis and angiogenesis, we believe that its inhibition by 1,25(OH)(2)D(3) strengthens the rationale to use vitamin D and its low-calcemic analogues in cancer chemoprevention and therapy.
Collapse
Affiliation(s)
- Moshe Ben-Shoshan
- Department of Pediatrics, Dana Children's Hospital, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | | | | | | | | | | |
Collapse
|
33
|
Abstract
Human solid tumors contain hypoxic regions that have considerably lower oxygen tension than the normal tissues. Hypoxia offers resistance to radiotherapy and anticancer chemotherapy, as well as predispose to increased tumor metastases. Furthermore, hypoxia induces hypoxia-inducible factor-1 (HIF-1), which in turn increases tumor angiogenesis. Thus, eradication of HIF-1-active/hypoxic tumor cells is very important for cancer therapy. We have previously reported that procaspase-3 fused with a von Hippel-Lindau (VHL)-mediated protein destruction motif of alpha subunit of HIF-1 (HIF-1alpha) containing Pro564, named TAT-ODD-procaspase-3 (TOP3), specifically induced cell death to hypoxic cells in vivo as well as in vitro. We now report that TOP3 also eradicates the radiation-induced HIF-1-active tumor cells. HIF-1 activity in the xenografts of human tumor cells, which express luciferase under the transcriptional control of HIF-1, were monitored and quantified daily with an in vivo bioluminescence photon-counting device. HIF-1 activity in tumors was more rapidly increased by ionizing radiation (IR) compared to untreated tumors. TOP3 efficiently decreased the HIF-1-activity in irradiated tumors as well as unirradiated ones, indicating TOP3 eradicated tumor cells with HIF-1-activity induced by IR as well as hypoxia. Eradication of HIF-1-active/hypoxic cells in the xenografts during irradiation exhibited significant suppression in angiogenesis and strong enhancement in a long-term growth suppression of tumor xenografts. These results further strengthen the argument that HIF-1-active/hypoxic cells play crucial roles in angiogenesis and radioresistance.
Collapse
MESH Headings
- Adenocarcinoma/pathology
- Adenocarcinoma/physiopathology
- Adenocarcinoma/prevention & control
- Animals
- Cell Death
- Cell Hypoxia
- Cell Line, Tumor
- Female
- HeLa Cells
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/physiology
- Hypoxia-Inducible Factor 1, alpha Subunit/radiation effects
- Mice
- Mice, Transgenic
- Neovascularization, Pathologic/prevention & control
- Pancreatic Neoplasms/pathology
- Pancreatic Neoplasms/physiopathology
- Pancreatic Neoplasms/prevention & control
- Promoter Regions, Genetic
- Radiation, Ionizing
- Recombinant Fusion Proteins/physiology
- Transplantation, Heterologous
- Uterine Cervical Neoplasms/pathology
- Uterine Cervical Neoplasms/physiopathology
- Uterine Cervical Neoplasms/prevention & control
Collapse
Affiliation(s)
- H Harada
- Department of Radiation Oncology and Image-Applied Therapy, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | | | | | | | | |
Collapse
|
34
|
Provot S, Zinyk D, Gunes Y, Kathri R, Le Q, Kronenberg HM, Johnson RS, Longaker MT, Giaccia AJ, Schipani E. Hif-1alpha regulates differentiation of limb bud mesenchyme and joint development. ACTA ACUST UNITED AC 2007; 177:451-64. [PMID: 17470636 PMCID: PMC2064828 DOI: 10.1083/jcb.200612023] [Citation(s) in RCA: 148] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Recent evidence suggests that low oxygen tension (hypoxia) may control fetal development and differentiation. A crucial mediator of the adaptive response of cells to hypoxia is the transcription factor Hif-1α. In this study, we provide evidence that mesenchymal condensations that give origin to endochondral bones are hypoxic during fetal development, and we demonstrate that Hif-1α is expressed and transcriptionally active in limb bud mesenchyme and in mesenchymal condensations. To investigate the role of Hif-1α in mesenchymal condensations and in early chondrogenesis, we conditionally inactivated Hif-1α in limb bud mesenchyme using a Prx1 promoter-driven Cre transgenic mouse. Conditional knockout of Hif-1α in limb bud mesenchyme does not impair mesenchyme condensation, but alters the formation of the cartilaginous primordia. Late hypertrophic differentiation is also affected as a result of the delay in early chondrogenesis. In addition, mutant mice show a striking impairment of joint development. Our study demonstrates a crucial, and previously unrecognized, role of Hif-1α in early chondrogenesis and joint formation.
Collapse
Affiliation(s)
- Sylvain Provot
- Endocrine Unit, Department of Medicine, Massachusetts General Hospital-Harvard Medical School, Boston, MA 02114, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Abstract
UNLABELLED HIF-1alpha activates genes under hypoxia and was hypothesized to regulate bone regeneration. Surprisingly, HIF-1alpha+/- fracture calluses are larger, stronger, and stiffer than HIF-1alpha+/+ calluses because of decreased apoptosis. These data identify apoptosis inhibition as a means to enhance bone regeneration. INTRODUCTION Bone regeneration subsequent to fracture involves the synergistic activation of multiple signaling pathways. Localized hypoxia after fracture activates hypoxia-inducible factor 1alpha (HIF-1alpha), leading to increased expression of HIF-1 target genes. We therefore hypothesized that HIF-1alpha is a key regulator of bone regeneration. MATERIALS AND METHODS Fixed femoral fractures were generated in mice with partial HIF-1alpha deficiency (HIF-1alpha+/-) and wildtype littermates (HIF-1alpha+/+). Fracture calluses and intact contralateral femurs from postfracture days (PFDs) 21 and 28 (N=5-10) were subjected to microCT evaluation and four-point bending to assess morphometric and mechanical properties. Molecular analyses were carried out on PFD 7, 10, and 14 samples (N=3) to determine differential gene expression at both mRNA and protein levels. Finally, TUNEL staining was performed on PFD 14 samples (N=2) to elucidate differential apoptosis. RESULTS Surprisingly, fracture calluses from HIF-1alpha+/- mice exhibited greater mineralization and were larger, stronger, and stiffer. Microarray analyses focused on hypoxia-induced genes revealed differential expression (between genotypes) of several genes associated with the apoptotic pathway. Real-time PCR confirmed these results, showing higher expression of proapoptotic protein phosphatase 2a (PP2A) and lower expression of anti-apoptotic B-cell leukemia/lymphoma 2 (BCL2) in HIF-1alpha+/+ calluses. Subsequent TUNEL staining showed that HIF-1alpha+/+ calluses contained larger numbers of TUNEL+ chondrocytes and osteoblasts than HIF-1alpha+/- calluses. CONCLUSIONS We conclude that partial HIF-1alpha deficiency results in decreased chondrocytic and osteoblastic apoptosis, thereby allowing the development of larger, stiffer calluses and enhancing bone regeneration. Furthermore, apoptosis inhibition may be a promising target for developing new treatments to accelerate bone regeneration.
Collapse
Affiliation(s)
- David E Komatsu
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York, USA
| | - Marta Bosch-Marce
- Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Gregg L Semenza
- Vascular Biology Program, Institute for Cell Engineering, Department of Pediatrics, Medicine, Oncology, and Radiation Oncology and McKusick-Nathans Institute of Genetic Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael Hadjiargyrou
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York, USA
| |
Collapse
|
36
|
Liao D, Corle C, Seagroves TN, Johnson RS. Hypoxia-inducible factor-1alpha is a key regulator of metastasis in a transgenic model of cancer initiation and progression. Cancer Res 2007; 67:563-72. [PMID: 17234764 DOI: 10.1158/0008-5472.can-06-2701] [Citation(s) in RCA: 269] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Adaptation to hypoxia is a critical step in tumor progression and is, in part, regulated by the transcription factor hypoxia-inducible factor-1alpha (HIF-1alpha). Xenograft models have been extensively used to characterize the role of HIF-1alpha in experimental cancers. Although these models provide an understanding of tumor growth at terminal stages of malignancy, they do not address tumor initiation or metastatic progression. To elucidate these roles, HIF-1alpha was conditionally deleted in the mammary epithelium of a transgenic mouse model for metastatic breast cancer. Conditional deletion of HIF-1alpha in the mammary epithelium resulted in delayed tumor onset and retarded tumor growth; this was correlated with decreased tumor cell proliferation. Tumors with conditional deletion of HIF-1alpha were also less vascular during early tumor progression. Perhaps most surprisingly, deletion of HIF-1alpha in the mammary epithelium resulted in decreased pulmonary metastasis. These results show that whereas HIF-1alpha is not required for the initiation of breast tumor growth or tumor cell metastasis, the transcriptional activity of HIF-1alpha is a significant positive regulator of tumor progression and metastatic potential.
Collapse
Affiliation(s)
- Debbie Liao
- Division of Biological Sciences, Molecular Biology Section, and Department of Molecular Pathology, School of Medicine, University of California, San Diego, La Jolla, California 92093-0377, USA
| | | | | | | |
Collapse
|
37
|
Zhang X, Zhou K, Wang R, Cui J, Lipton SA, Liao FF, Xu H, Zhang YW. Hypoxia-inducible factor 1alpha (HIF-1alpha)-mediated hypoxia increases BACE1 expression and beta-amyloid generation. J Biol Chem 2007; 282:10873-80. [PMID: 17303576 DOI: 10.1074/jbc.m608856200] [Citation(s) in RCA: 294] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The incidence of Alzheimer disease (AD) and vascular dementia is greatly increased following cerebral ischemia and stroke in which hypoxic conditions occur in affected brain areas. beta-Amyloid peptide (Abeta), which is derived from the beta-amyloid precursor protein (APP) by sequential proteolytic cleavages from beta-secretase (BACE1) and presenilin-1 (PS1)/gamma-secretase, is widely believed to trigger a cascade of pathological events culminating in AD and vascular dementia. However, a direct molecular link between hypoxic insults and APP processing has yet to be established. Here, we demonstrate that acute hypoxia increases the expression and the enzymatic activity of BACE1 by up-regulating the level of BACE1 mRNA, resulting in increases in the APP C-terminal fragment-beta (betaCTF) and Abeta. Hypoxia has no effect on the level of PS1, APP, and tumor necrosis factor-alpha-converting enzyme (TACE, an enzyme known to cleave APP at the alpha-secretase cleavage site). Sequence analysis, mutagenesis, and gel shift studies revealed binding of HIF-1 to the BACE1 promoter. Overexpression of HIF-1alpha increases BACE1 mRNA and protein level, whereas down-regulation of HIF-1alpha reduced the level of BACE1. Hypoxic treatment fails to further potentiate the stimulatory effect of HIF-1alpha overexpression on BACE1 expression, suggesting that hypoxic induction of BACE1 expression is primarily mediated by HIF-1alpha. Finally, we observed significant reduction in BACE1 protein levels in the hippocampus and the cortex of HIF-1alpha conditional knock-out mice. Our results demonstrate an important role for hypoxia/HIF-1alpha in modulating the amyloidogenic processing of APP and provide a molecular mechanism for increased incidence of AD following cerebral ischemic and stroke injuries.
Collapse
Affiliation(s)
- Xian Zhang
- Institute for Biomedical Research and School of Life Sciences, Xiamen University, Xiamen 361005, China
| | | | | | | | | | | | | | | |
Collapse
|
38
|
Lukashev D, Klebanov B, Kojima H, Grinberg A, Ohta A, Berenfeld L, Wenger RH, Ohta A, Sitkovsky M. Cutting edge: hypoxia-inducible factor 1alpha and its activation-inducible short isoform I.1 negatively regulate functions of CD4+ and CD8+ T lymphocytes. J Immunol 2007; 177:4962-5. [PMID: 17015677 DOI: 10.4049/jimmunol.177.8.4962] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To evaluate the role of hypoxia-inducible factor 1alpha (HIF-1alpha) and its TCR activation-inducible short isoform I.1 in T cell functions, we genetically engineered unique mice with: 1) knockout of I.1 isoform of HIF-1alpha; 2) T cell-targeted HIF-1alpha knockdown; and 3) chimeric mice with HIF-1alpha gene deletion in T and B lymphocytes. In all three types of mice, the HIF-1alpha-deficient T lymphocytes, which were TCR-activated in vitro, produced more proinflammatory cytokines compared with HIF-1alpha-expressing control T cells. Surprisingly, deletion of the I.1 isoform, which represents < 30% of total HIF-1alpha mRNA in activated T cells, was sufficient to markedly enhance TCR-triggered cytokine secretion. These data suggest that HIF-1alpha not only plays a critical role in oxygen homeostasis but also may serve as a negative regulator of T cells.
Collapse
Affiliation(s)
- Dmitriy Lukashev
- New England Inflammation and Tissue Protection Institute, Northeastern University, Boston, MA 02115, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Milosevic J, Maisel M, Wegner F, Leuchtenberger J, Wenger RH, Gerlach M, Storch A, Schwarz J. Lack of Hypoxia-Inducible Factor-1 Impairs Midbrain Neural Precursor Cells Involving Vascular Endothelial Growth Factor Signaling. J Neurosci 2007; 27:412-21. [PMID: 17215402 PMCID: PMC6672078 DOI: 10.1523/jneurosci.2482-06.2007] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oxygen tension is critical for proliferation of human and murine midbrain-derived neural precursor cells (mNPCs). Here, we conditionally inactivated the hypoxia-responsive transcription factor hypoxia-inducible factor-1alpha (HIF-1alpha) in murine NPCs to determine its role in proliferation, survival, and dopaminergic differentiation in vitro as well as survival of murine dopaminergic neurons in vivo. HIF-1alpha conditional knock-out (HIF-1alpha CKO) mNPCs showed midbrain-specific impairment of survival and proliferation. Dopaminergic differentiation of HIF-1alpha CKO mNPCs in vitro was markedly reduced. Expression of vascular endothelial growth factor (VEGF) mRNA was reduced in HIF-1alpha CKO mNPCs, whereas erythropoietin signaling was not affected. Treatment of HIF-1alpha CKO mNPCs with 50 ng/ml VEGF partially recovered proliferation and dopaminergic differentiation in vitro. In substantia nigra (SN) of adult HIF-1alpha CKO mice, protein levels of dopaminergic marker molecules such as tyrosine hydroxylase (TH) and aldehyde dehydrogenase were reduced by 41 and 61%, respectively. The cell survival marker Bcl-2 was reduced by 58% while caspase-3 was activated. Nonbiased stereological cell counts of TH-positive neurons in SN of young adult HIF-1alpha CKO mice revealed a reduction of 31% compared with cre/wt mice (in which the wild-type Hif1a allele is expressed in parallel with the Cre recombinase allele). However, we found no impairment of striatal dopamine concentrations or locomotor behavior. In conclusion, HIF-1alpha seems to be a transcription factor relevant to the development and survival of substantia nigra dopaminergic neurons involving VEGF signaling.
Collapse
|
40
|
Peng YJ, Yuan G, Ramakrishnan D, Sharma SD, Bosch-Marce M, Kumar GK, Semenza GL, Prabhakar NR. Heterozygous HIF-1alpha deficiency impairs carotid body-mediated systemic responses and reactive oxygen species generation in mice exposed to intermittent hypoxia. J Physiol 2006; 577:705-16. [PMID: 16973705 PMCID: PMC1890436 DOI: 10.1113/jphysiol.2006.114033] [Citation(s) in RCA: 285] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Chronic intermittent hypoxia (CIH) occurs in patients with sleep apnoea and has adverse effects on multiple physiological functions. Previous studies have shown that reflexes arising from carotid bodies mediate CIH-evoked cardio-respiratory responses, and reactive oxygen species (ROS) play important roles in eliciting systemic responses to CIH. Very little is known about the molecular mechanisms underlying CIH. The transcriptional activator hypoxia-inducible factor-1 (HIF-1) mediates a broad range of cellular and systemic responses to hypoxia, and HIF-1 is activated in cell cultures exposed to IH. In the present study we examined whether CIH activates HIF-1 and if so whether it contributes to cardio-respiratory responses and ROS generation in mice. Experiments were performed on male littermate wild-type (WT) and heterozygous (HET) mice partially deficient in HIF-1alpha, the O2 regulated subunit of the HIF-1 complex. Both groups of mice were exposed to either 10 days of CIH (15 s of hypoxia followed by 5 min of normoxia, 9 episodes h-1, 8 h day-1) or to 10 days of 21% O2 (controls). Carotid body response to hypoxia was augmented, and acute intermittent hypoxia (AIH) induced sensory long-term facilitation (sLTF) of the chemoreceptor activity in CIH-exposed WT mice. In striking contrast, hypoxic sensory response was unaffected and AIH was ineffective in eliciting sLTF in CIH-exposed HET mice. Analysis of cardio-respiratory responses in CIH-exposed WT mice revealed augmented hypoxic ventilatory response, LTF of breathing, elevated blood pressures and increased plasma noradrenaline. In striking contrast these responses were either absent or attenuated in HET mice exposed to CIH. In CIH-exposed WT mice, ROS were elevated and this response was absent in HET mice. Manganese (III) tetrakis(1-methyl-4-pyridyl) porphyrin pentachloride, a potent scavenger of superoxide, not only prevented CIH-induced increases in ROS but also CIH-evoked HIF-1alpha up-regulation in WT mice. These results indicate that: (a) HIF-1 activation is critical for eliciting CIH-induced carotid body-mediated cardio-respiratory responses; (b) CIH increases ROS; and (c) the effects of CIH involve complex positive interactions between HIF-1 and ROS.
Collapse
Affiliation(s)
- Ying-Jie Peng
- Department of Physiology & Biophysics, School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44109, USA
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Ramírez-Bergeron DL, Runge A, Adelman DM, Gohil M, Simon MC. HIF-dependent hematopoietic factors regulate the development of the embryonic vasculature. Dev Cell 2006; 11:81-92. [PMID: 16824955 PMCID: PMC3145415 DOI: 10.1016/j.devcel.2006.04.018] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2005] [Revised: 03/28/2006] [Accepted: 04/27/2006] [Indexed: 01/16/2023]
Abstract
Hypoxia inducible factors (HIFs) regulate adaptive responses to changes in oxygen (O(2)) tension during embryogenesis, tissue ischemia, and tumorigenesis. Because HIF-deficient embryos exhibit a number of developmental defects, the precise role of HIF in early vascular morphogenesis has been uncertain. Using para-aortic splanchnopleural (P-Sp) explant cultures, we show that deletion of the HIF-beta subunit (ARNT) results in defective hematopoiesis and the inhibition of both vasculogenesis and angiogenesis. These defects are rescued upon the addition of wild-type Sca-1(+) hematopoietic cells or recombinant VEGF. Arnt(-/-) embryos exhibit reduced levels of VEGF protein and increased numbers of apoptotic hematopoietic cells. These results suggest that HIF coordinates early endothelial cell emergence and vessel development by promoting hematopoietic cell survival and paracrine growth factor production.
Collapse
Affiliation(s)
- Diana L. Ramírez-Bergeron
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Anja Runge
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - David M. Adelman
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Mercy Gohil
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - M. Celeste Simon
- Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Corresponding Author: M. Celeste Simon, Ph.D., Howard Hughes Medical Institute, Abramson Family Cancer Research Institute, University of Pennsylvania School of Medicine, 456 BRB II/III, 421 Curie Blvd, Philadelphia, PA 19104, TEL: 215-746-5532, FAX: 215-746-5511,
| |
Collapse
|
42
|
Laderoute KR, Amin K, Calaoagan JM, Knapp M, Le T, Orduna J, Foretz M, Viollet B. 5'-AMP-activated protein kinase (AMPK) is induced by low-oxygen and glucose deprivation conditions found in solid-tumor microenvironments. Mol Cell Biol 2006; 26:5336-47. [PMID: 16809770 PMCID: PMC1592699 DOI: 10.1128/mcb.00166-06] [Citation(s) in RCA: 352] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Low oxygen gradients (hypoxia and anoxia) are important determinants of pathological conditions under which the tissue blood supply is deficient or defective, such as in solid tumors. We have been investigating the relationship between the activation of hypoxia-inducible factor 1 (HIF-1), the primary transcriptional regulator of the mammalian response to hypoxia, and 5'-AMP-activated protein kinase (AMPK), another regulatory system important for controlling cellular energy metabolism. In the present study, we used mouse embryo fibroblasts nullizygous for HIF-1alpha or AMPK expression to show that AMPK is rapidly activated in vitro by both physiological and pathophysiological low-oxygen conditions, independently of HIF-1 activity. These findings imply that HIF-1 and AMPK are components of a concerted cellular response to maintain energy homeostasis in low-oxygen or ischemic-tissue microenvironments. Finally, we used transformed derivatives of wild-type and HIF-1alpha- or AMPKalpha-null mouse embryo fibroblasts to determine whether AMPK is activated in vivo. We obtained evidence that AMPK is activated in authentic hypoxic tumor microenvironments and that this activity overlaps with regions of hypoxia detected by a chemical probe. We also showed that AMPK is important for the growth of this tumor model.
Collapse
MESH Headings
- AMP-Activated Protein Kinases
- Acetyl-CoA Carboxylase/metabolism
- Adenosine Triphosphate/metabolism
- Animals
- Cells, Cultured
- Enzyme Activation
- Female
- Genes, ras
- Glucose/metabolism
- Hypoxia/enzymology
- Hypoxia-Inducible Factor 1, alpha Subunit/deficiency
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- Mice, Nude
- Multienzyme Complexes/deficiency
- Multienzyme Complexes/genetics
- Multienzyme Complexes/metabolism
- Neoplasms, Experimental/enzymology
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/metabolism
- Phosphorylation
- Protein Serine-Threonine Kinases/deficiency
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- Transformation, Genetic
Collapse
Affiliation(s)
- Keith R Laderoute
- SRI International, Bldg. L, Rm. A258, 333 Ravenswood Ave., Menlo Park, CA 94025, USA.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Victor N, Ivy A, Jiang BH, Agani FH. Involvement of HIF-1 in invasion of Mum2B uveal melanoma cells. Clin Exp Metastasis 2006; 23:87-96. [PMID: 16826425 DOI: 10.1007/s10585-006-9024-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2006] [Accepted: 05/28/2006] [Indexed: 01/23/2023]
Abstract
The propensity of uveal melanoma cells for invasion and metastasis is critical factor for the clinical outcome of this form of cancer, and the essential biology of its aggressiveness is not completely understood. In the present study we investigated the involvement of hypoxia-inducible factor 1 (HIF-1) in uveal melanoma migration, invasion and adhesion, the hallmarks of aggressive behavior of cancer cells. We demonstrate that exposure to hypoxia increased migration, invasion and adhesion of uveal melanoma cells in in vitro assays. The "silencing" of HIF-1alpha, the oxygen-regulated subunit of HIF-1, using RNA interference technology resulted in a marked decrease of the uveal melanoma cell migration, invasion and adhesion. GeneChip microarray analysis revealed that a number of genes which regulate cancer invasion and metabolism such as CXCR4, angiopoietin-related protein, pyruvate dehydrogenase kinase 1 (PDK1) are also activated by hypoxia in a HIF-1-dependent manner in Mum2B uveal melanoma cells. We further demonstrate that serum deprivation resulted in HIF-1 and CXCR4 activation, suggesting specific metabolic regulation of HIF-1 in these cells. Microarray analysis of serum-deprived cells identified among the upregulated genes a number of cancer invasion-related genes, some of them being known HIF-1-regulated targets. Taken together, these results suggest that the involvement of HIF-1 in uveal melanoma tumorigenesis is significant and complex, and that metabolic regulation of HIF-1 activation in Mum2B uveal melanoma cells has its specificities.
Collapse
Affiliation(s)
- Nicole Victor
- Department of Anatomy and Case Comprehensive Cancer Center, Case Western Reserve University, 322 Biomedical Research Building, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA
| | | | | | | |
Collapse
|
44
|
Stiehl DP, Wirthner R, Köditz J, Spielmann P, Camenisch G, Wenger RH. Increased prolyl 4-hydroxylase domain proteins compensate for decreased oxygen levels. Evidence for an autoregulatory oxygen-sensing system. J Biol Chem 2006; 281:23482-91. [PMID: 16790428 DOI: 10.1074/jbc.m601719200] [Citation(s) in RCA: 215] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Prolyl 4-hydroxylase domain (PHD) proteins are oxygen-dependent enzymes that hydroxylate hypoxia-inducible transcription factor (HIF) alpha-subunits, leading to their subsequent ubiquitination and degradation. Paradoxically, the expression of two family members (PHD2 and PHD3) is induced in hypoxic cell culture despite the reduced availability of the oxygen co-substrate, and it has been suggested that they become functionally relevant following re-oxygenation to rapidly terminate the HIF response. Here we show that PHDs are also induced in hypoxic mice in vivo, albeit in a tissue-specific manner. As demonstrated under chronically hypoxic conditions in vitro, PHD2 and PHD3 show a transient maximum but remain up-regulated over more than 10 days, suggesting a feedback down-regulation of HIF-1alpha which then levels off at a novel set point. Indeed, hypoxic induction of PHD2 and PHD3 is paralleled by the attenuation of endogenous HIF-1alpha. Using an engineered oxygen-sensitive reporter gene in a cellular background lacking endogenous HIF-1alpha and hence inducible PHD expression, we could show that increased exogenous PHD levels can compensate for a wide range of hypoxic conditions. Similar data were obtained in a reconstituted cell-free system in vitro. In summary, these results suggest that due to their high O2 Km values, PHDs have optimal oxygen-sensing properties under all physiologically relevant oxygen concentrations; increased PHDs play a functional role even under oxygen-deprived conditions, allowing the HIF system to adapt to a novel oxygen threshold and to respond to another hypoxic insult. Furthermore, such an autoregulatory oxygen-sensing system would explain how a single mechanism works in a wide variety of differently oxygenated tissues.
Collapse
Affiliation(s)
- Daniel P Stiehl
- Institute of Physiology and Center for Integrative Human Physiology, University of Zürich, CH-8057 Zürich, Switzerland.
| | | | | | | | | | | |
Collapse
|
45
|
Hägele S, Behnam B, Borter E, Wolfe J, Paasch U, Lukashev D, Sitkovsky M, Wenger RH, Katschinski DM. TSGA10 prevents nuclear localization of the hypoxia-inducible factor (HIF)-1alpha. FEBS Lett 2006; 580:3731-8. [PMID: 16777103 DOI: 10.1016/j.febslet.2006.05.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Revised: 05/19/2006] [Accepted: 05/24/2006] [Indexed: 01/23/2023]
Abstract
The hypoxia-inducible factor (HIF)-1 is a transcriptional regulator of genes involved in oxygen homeostasis. We previously described testis-specific isoforms of HIF-1alpha (mHIF-1alphaI.1 and hHIF-1alphaTe). Using mHIF-1alpha exon I.1 knock-out mice we confirmed the specific expression of mHIF-1alphaI.1 in the sperm tail. A protein-protein interaction between HIF-1alpha and the testis specific gene antigen 10 (TSGA10) was identified by yeast two-hybrid screening. TSGA10 is expressed in testis but also in other organs and malignant tissues. Immunofluorescence analysis indicated that the C-terminal part of TSGA10 accumulates in the midpiece of spermatozoa, where it co-localizes with HIF-1alpha. HIF-1alpha nuclear localization and HIF-1 transcriptional activity were significantly affected by overexpressed TSGA10.
Collapse
Affiliation(s)
- Sonja Hägele
- Cell Physiology Group, Martin-Luther University of Halle, Magdeburger Strasse 2, D-06097 Halle, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Okuyama H, Krishnamachary B, Zhou YF, Nagasawa H, Bosch-Marce M, Semenza GL. Expression of Vascular Endothelial Growth Factor Receptor 1 in Bone Marrow-derived Mesenchymal Cells Is Dependent on Hypoxia-inducible Factor 1. J Biol Chem 2006; 281:15554-63. [PMID: 16574650 DOI: 10.1074/jbc.m602003200] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Bone marrow-derived cells are recruited to sites of ischemia, where they promote tissue vascularization. This response is dependent upon the expression of vascular endothelial growth factor (VEGF) receptor 1 (VEGFR1), which mediates cell migration in response to VEGF or placental growth factor (PLGF). In this study, we found that exposure of cultured mouse bone marrow-derived mesenchymal stromal cells (MSC) to hypoxia or an adenovirus encoding a constitutively active form of hypoxia-inducible factor 1 (HIF-1) induced VEGFR1 mRNA and protein expression and promoted ex vivo migration in response to VEGF or PLGF. MSC in which HIF-1 activity was inhibited by a dominant negative or RNA interference approach expressed markedly reduced levels of VEGFR1 and failed to migrate or activate AKT in response to VEGF or PLGF. Thus, loss-of-function and gain-of-function approaches demonstrated that HIF-1 activity is necessary and sufficient for basal and hypoxia-induced VEGFR1 expression in bone marrow-derived MSC.
Collapse
Affiliation(s)
- Hiroaki Okuyama
- Vascular Biology Program, Institute for Cell Engineeringe, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | | | | | | | | | | |
Collapse
|
47
|
Abstract
The tumor suppressor von Hippel-Lindau protein (pVHL) is critical for cellular molecular oxygen sensing, acting to target degradation of the hypoxia-inducible factor alpha transcription factor subunits under normoxic conditions. We have found that independent of its function in regulating hypoxic response, the VHL gene plays a critical role in embryonic endothelium development through regulation of vascular extracellular matrix assembly. We created mice lacking the VHL gene in endothelial cells; these conditional null mice died at the same stage as homozygous VHL-null mice, with similar vascular developmental defects. These included defective vasculogenesis in the placental labyrinth, a collapsed endocardium, and impaired vessel network patterning. The defects in embryonic vascularization were correlated with a diminished vascular fibronectin deposition in vivo and defective endothelial extracellular fibronectin assembly in vitro. We found that the impaired migration and adhesion of VHL-null endothelial cells can be partially rescued by the addition of back exogenous fibronectin, which indicates that pVHL regulation of fibronectin deposition plays an important functional role in vascular patterning and maintenance of vascular integrity.
Collapse
Affiliation(s)
- Nan Tang
- Molecular Biology Section, MC-0377, Division of Biological Sciences, University of California--San Diego, La Jolla, California 92093-0377, USA
| | | | | | | | | |
Collapse
|
48
|
Li J, Shi M, Cao Y, Yuan W, Pang T, Li B, Sun Z, Chen L, Zhao RC. Knockdown of hypoxia-inducible factor-1α in breast carcinoma MCF-7 cells results in reduced tumor growth and increased sensitivity to methotrexate. Biochem Biophys Res Commun 2006; 342:1341-51. [PMID: 16516853 DOI: 10.1016/j.bbrc.2006.02.094] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2006] [Accepted: 02/14/2006] [Indexed: 11/21/2022]
Abstract
The hypoxia-inducible factor (HIF) 1alpha is a key regulator of the cellular response to oxygen deprivation. Specific disruption of the HIF-1 pathway is important for exploring its role in tumor biology and developing more efficient weapons to treat cancer. In this study, we stably transfected human breast tumor MCF-7 cells with short hairpin RNA expression vectors targeting HIF-1alpha. After knockdown of HIF-1alpha, hypoxia-induced expression of its target genes such as vascular endothelial growth factor, Glut-1, phosphoglycerate kinase, and P-glycoprotein were markedly attenuated. Moreover, HIF-1alpha knockdown was found to suppress the shift from S-phase to G(1) induced by hypoxia and increase drug sensitivity to methotrexate. The growth rates of HIF1alpha-knockdown tumors were drastically retarded in both subcutaneous and orthotopic xenograft models, which were accompanied by decreased angiogenesis and reduced expression of glucose transporter in tissue sections. These data demonstrate that HIF-1alpha knockdown reduces tumorigenicity of MCF-7 cells and suggest a promising combination of both anti-HIF-1 strategy and traditional chemotherapy to improve cancer treatment.
Collapse
Affiliation(s)
- Jing Li
- Institute of Basic Medical Sciences and School of Basic Medicine, Center of Excellence in Tissue Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Dang DT, Chen F, Gardner LB, Cummins JM, Rago C, Bunz F, Kantsevoy SV, Dang LH. Hypoxia-inducible factor-1alpha promotes nonhypoxia-mediated proliferation in colon cancer cells and xenografts. Cancer Res 2006; 66:1684-936. [PMID: 16452228 DOI: 10.1158/0008-5472.can-05-2887] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hypoxia-inducible factor-1alpha (HIF-1alpha) is a transcription factor that directly transactivates genes important for the growth and metabolism of solid tumors. HIF-1alpha is overexpressed in cancer, and its level of expression is correlated with patient mortality. Increased synthesis or stability of HIF-1alpha can be induced by hypoxia-dependent or hypoxia-independent factors. Thus, HIF-1alpha is expressed in both nonhypoxic and hypoxic cancer cells. The role of HIF-1alpha in nonhypoxia-mediated cancer cell proliferation remains speculative. We have disrupted HIF-1alpha by targeted homologous recombination in HCT116 and RKO human colon cancer cells. Loss of HIF-1alpha significantly reduced nonhypoxia-mediated cell proliferation in vitro and in vivo. Paradoxically, loss of HIF-1alpha expression did not grossly affect the hypoxic compartments within tumor xenografts in vivo, although HIF-1alpha promoted cell proliferation and survival under hypoxia in vitro. To further test the role of HIF-1alpha within tumor compartments, we generated cells with combined disruptions of both HIF-1alpha and vascular endothelial growth factor (VEGF). In all xenografts, disruption of VEGF led to marked expansion of the hypoxic compartments and growth delay. Nonetheless, the presence or absence of HIF-1alpha did not grossly affect these expanded hypoxic compartments. These data provide compelling evidence that, in a subset of colon cancers, (a) HIF-1alpha is a positive factor for nonhypoxia-mediated cell proliferation in vitro and in vivo and (b) HIF-1alpha is a positive factor for cell proliferation and survival under hypoxic conditions in vitro, but does not grossly contribute to the tumor hypoxic compartments in vivo.
Collapse
Affiliation(s)
- Duyen T Dang
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical Center, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Papandreou I, Cairns RA, Fontana L, Lim AL, Denko NC. HIF-1 mediates adaptation to hypoxia by actively downregulating mitochondrial oxygen consumption. Cell Metab 2006; 3:187-97. [PMID: 16517406 DOI: 10.1016/j.cmet.2006.01.012] [Citation(s) in RCA: 1610] [Impact Index Per Article: 89.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2005] [Revised: 12/19/2005] [Accepted: 01/31/2006] [Indexed: 02/07/2023]
Abstract
The HIF-1 transcription factor drives hypoxic gene expression changes that are thought to be adaptive for cells exposed to a reduced-oxygen environment. For example, HIF-1 induces the expression of glycolytic genes. It is presumed that increased glycolysis is necessary to produce energy when low oxygen will not support oxidative phosphorylation at the mitochondria. However, we find that while HIF-1 stimulates glycolysis, it also actively represses mitochondrial function and oxygen consumption by inducing pyruvate dehydrogenase kinase 1 (PDK1). PDK1 phosphorylates and inhibits pyruvate dehydrogenase from using pyruvate to fuel the mitochondrial TCA cycle. This causes a drop in mitochondrial oxygen consumption and results in a relative increase in intracellular oxygen tension. We show by genetic means that HIF-1-dependent block to oxygen utilization results in increased oxygen availability, decreased cell death when total oxygen is limiting, and reduced cell death in response to the hypoxic cytotoxin tirapazamine.
Collapse
Affiliation(s)
- Ioanna Papandreou
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California 94305, USA
| | | | | | | | | |
Collapse
|