201
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Schito L. Bridging angiogenesis and immune evasion in the hypoxic tumor microenvironment. Am J Physiol Regul Integr Comp Physiol 2018; 315:R1072-R1084. [PMID: 30183339 DOI: 10.1152/ajpregu.00209.2018] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Hypoxia (low O2) is a ubiquitous microenvironmental factor promoting cancer progression, metastasis, and mortality, owing to the ability of cancer cells to co-opt physiological angiogenic responses. Notwithstanding, the pathophysiological induction of angiogenesis results in an abnormal tumor vasculature, further aggravating hypoxia in a feedforward loop that limits the efficacy of molecular targeted therapies. Recent studies suggest that, besides their canonical roles, angiogenic factors promote a panoply of immunosuppressive effects in the tumor microenvironment. Therefore, intratumoral hypoxia emerges as a hitherto unrecognized mechanism evolutionarily repurposing angiogenic molecules as (patho)physiological immunomodulators. On the other hand, antiangiogenic therapies could be aimed at impeding both tumor growth and immunotolerance toward cancer cells, a beneficial effect that can be countered if hypoxia signaling pathways are left unchecked, leading to therapeutic failure. This review summarizes evidence supporting the hypothesis that hypoxia acts as a common pathophysiological mechanism of resistance to immunotherapeutic and antiangiogenic agents while proposing potential strategies to curtail resistance and mortality in patients bearing solid malignancies.
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Affiliation(s)
- Luana Schito
- Biological Sciences Platform, Sunnybrook Research Institute, University of Toronto , Toronto, Ontario , Canada
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202
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Bhargava P, Kumari A, Putri JF, Ishida Y, Terao K, Kaul SC, Sundar D, Wadhwa R. Caffeic acid phenethyl ester (CAPE) possesses pro-hypoxia and anti-stress activities: bioinformatics and experimental evidences. Cell Stress Chaperones 2018; 23:1055-1068. [PMID: 29869000 PMCID: PMC6111076 DOI: 10.1007/s12192-018-0915-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/07/2018] [Accepted: 05/14/2018] [Indexed: 12/27/2022] Open
Abstract
Honeybee propolis and its bioactive component, caffeic acid phenethyl ester (CAPE), are known for a variety of therapeutic potentials. By recruiting a cell-based reporter assay for screening of hypoxia-modulating natural drugs, we identified CAPE as a pro-hypoxia factor. In silico studies were used to probe the capacity of CAPE to interact with potential hypoxia-responsive proteins. CAPE could not dock into hypoxia inducing factor (HIF-1), the master regulator of hypoxia response pathway. On the other hand, it was predicted to bind to factor inhibiting HIF (FIH-1). The active site residue (Asp201) of FIH-1α was involved in hydrogen bond formation with CAPE and its analogue, caffeic acid methyl ester (CAME), especially in the presence of Fe and 2-oxoglutaric acid (OGA). We provide experimental evidence that the low doses of CAPE, that did not cause cytotoxicity or anti-migratory effect, activated HIF-1α and inhibited stress-induced protein aggregation, a common cause of age-related pathologies. Furthermore, by structural homology search, we explored and found candidate compounds that possess stronger FIH-1 binding capacity. These compounds could be promising candidates for modulating therapeutic potential of CAPE, and its recruitment in treatment of protein aggregation-based disorders.
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Affiliation(s)
- Priyanshu Bhargava
- DAILAB, DBT-AIST International Center for Translational and Environmental Research (DAICENTER), National Institute of Advanced Industrial Science and Technology (AIST), Central 5-41, 1-1-1 Higashi, Tsukuba, Ibaraki, 305 8565, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305 8572, Japan
| | - Anjani Kumari
- DAILAB, Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology (IIT) Delhi, New Delhi, 110 016, India
| | - Jayarani F Putri
- DAILAB, DBT-AIST International Center for Translational and Environmental Research (DAICENTER), National Institute of Advanced Industrial Science and Technology (AIST), Central 5-41, 1-1-1 Higashi, Tsukuba, Ibaraki, 305 8565, Japan
| | - Yoshiyuki Ishida
- CycloChem Co., Ltd, 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, 650 0047, Japan
| | - Keiji Terao
- CycloChem Co., Ltd, 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, 650 0047, Japan
| | - Sunil C Kaul
- DAILAB, DBT-AIST International Center for Translational and Environmental Research (DAICENTER), National Institute of Advanced Industrial Science and Technology (AIST), Central 5-41, 1-1-1 Higashi, Tsukuba, Ibaraki, 305 8565, Japan.
| | - Durai Sundar
- DAILAB, Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology (IIT) Delhi, New Delhi, 110 016, India.
| | - Renu Wadhwa
- DAILAB, DBT-AIST International Center for Translational and Environmental Research (DAICENTER), National Institute of Advanced Industrial Science and Technology (AIST), Central 5-41, 1-1-1 Higashi, Tsukuba, Ibaraki, 305 8565, Japan.
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203
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Araos J, Sleeman JP, Garvalov BK. The role of hypoxic signalling in metastasis: towards translating knowledge of basic biology into novel anti-tumour strategies. Clin Exp Metastasis 2018; 35:563-599. [DOI: 10.1007/s10585-018-9930-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/13/2018] [Indexed: 02/06/2023]
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204
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Wiedemann B, Weisner J, Rauh D. Chemical modulation of transcription factors. MEDCHEMCOMM 2018; 9:1249-1272. [PMID: 30151079 PMCID: PMC6097187 DOI: 10.1039/c8md00273h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 07/10/2018] [Indexed: 12/12/2022]
Abstract
Transcription factors (TFs) constitute a diverse class of sequence-specific DNA-binding proteins, which are key to the modulation of gene expression. TFs have been associated with human diseases, including cancer, Alzheimer's and other neurodegenerative diseases, which makes this class of proteins attractive targets for chemical biology and medicinal chemistry research. Since TFs lack a common binding site or structural similarity, the development of small molecules to efficiently modulate TF biology in cells and in vivo is a challenging task. This review highlights various strategies that are currently being explored for the identification and development of modulators of Myc, p53, Stat, Nrf2, CREB, ER, AR, HIF, NF-κB, and BET proteins.
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Affiliation(s)
- Bianca Wiedemann
- Technische Universität Dortmund , Fakultät für Chemie und Chemische Biologie , Otto-Hahn-Strasse 4a , D-44227 Dortmund , Germany . ; ; Tel: +49 (0)231 755 7080
| | - Jörn Weisner
- Technische Universität Dortmund , Fakultät für Chemie und Chemische Biologie , Otto-Hahn-Strasse 4a , D-44227 Dortmund , Germany . ; ; Tel: +49 (0)231 755 7080
| | - Daniel Rauh
- Technische Universität Dortmund , Fakultät für Chemie und Chemische Biologie , Otto-Hahn-Strasse 4a , D-44227 Dortmund , Germany . ; ; Tel: +49 (0)231 755 7080
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205
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Preclinical Evaluation of Discorhabdins in Antiangiogenic and Antitumor Models. Mar Drugs 2018; 16:md16070241. [PMID: 30029505 PMCID: PMC6071056 DOI: 10.3390/md16070241] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/09/2018] [Accepted: 07/16/2018] [Indexed: 12/12/2022] Open
Abstract
Elements of the hypoxia inducible factor (HIF) transcriptional system, a key regulator of the cellular hypoxic response, are up-regulated in a range of cancer cells. HIF is fundamentally involved in tumor angiogenesis, invasion, and energy metabolism. Inhibition of the transcriptional activity of HIF may be of therapeutic benefit to cancer patients. We recently described the identification of two marine pyrroloiminoquinone alkaloids with potent activity in inhibiting the interaction between the oncogenic transcription factor HIF-1α and the coactivator protein p300. Herein, we present further characterization data for these two screening hits: discorhabdin H (1) and discorhabdin L (2), with a specific focus on their anti-angiogenic and anti-tumor effects. We demonstrated that only discorhabdin L (2) possesses excellent anti-angiogenic activity in inhibiting endothelial cell proliferation and tube formation, as well as decreasing microvessel outgrowth in the ex vivo rat aortic ring assay. We further showed that discorhabdin L (2) significantly inhibits in vivo prostate tumor growth in a LNCaP xenograft model. In conclusion, our findings suggest that discorhabdin L (2) represents a promising HIF-1α inhibitor worthy of further drug development.
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206
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Verma P, Sharma A, Sodhi M, Thakur K, Bharti VK, Kumar P, Giri A, Kalia S, Swami SK, Mukesh M. Overexpression of genes associated with hypoxia in cattle adapted to Trans Himalayan region of Ladakh. Cell Biol Int 2018; 42:1141-1148. [PMID: 29719086 DOI: 10.1002/cbin.10981] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 04/28/2018] [Indexed: 11/05/2022]
Abstract
Ladakh is an important part of the Trans-Himalayan region located between the Kunlun mountain range in the north and the main Great Himalayas to the south in the state of Jammu and Kashmir of India. The local cattle from Leh and Ladakh region, known as "Ladakhi cattle" is a unique germplasm having an excellent adaptation potential to high altitude hypobaric stress. In the present study, an effort was made to evaluate the transcriptional pattern of hypoxia inducing factor-1 (HIF-1) and several of its regulated genes in PBMCs of local Ladakhi cattle, Holstein Frisian crosses, Jersey (exotic) maintained at high altitude region and Sahiwal (Bos indicus) and Karan Fries (cross bred) cattle maintained in tropical environment. The combined data set indicated increased expression of HIF-1 and its regulated genes viz., glucose transporter 1 (GLUT1), vascular endothelial growth factor (VEGF), and hexokinase (HK2) in high altitude cattle indicating their importance in maintaining cellular homeostasis during high altitude hypoxia. The data indicated that hypoxia associated genes accumulated under hypoxic conditions are part of an essential adaptive component for adaptation to the high altitude of the trans-Himalayan region. In contrary, higher expression of molecular chaperons' viz., HSP70 and HSP90 in tropically adapted cattle give tolerance to high ambient temperature prevalent in tropical condition. In conclusion, HIF-1 and its regulatory genes could be termed as important candidates for producing homeostatic responses to hypoxia in cattle populations reared in higher altitudes of the Trans-Himalayan region.
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Affiliation(s)
- Preeti Verma
- ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, India
| | - Ankita Sharma
- ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, India
| | - Monika Sodhi
- ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, India
| | - Kiran Thakur
- ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, India
| | - Vijay K Bharti
- Defence Institute of High Altitude Research, Leh, Jammu and Kashmir, India
| | - Prabhat Kumar
- Defence Institute of High Altitude Research, Leh, Jammu and Kashmir, India
| | - Arup Giri
- Defence Institute of High Altitude Research, Leh, Jammu and Kashmir, India
| | - Sahil Kalia
- Defence Institute of High Altitude Research, Leh, Jammu and Kashmir, India
| | | | - Manishi Mukesh
- ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, India
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207
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Genomic comparisons of Rhizobium species using in silico AFLP-PCR, endonuclease restriction, and AMPylating enzymes. ELECTRON J BIOTECHN 2018. [DOI: 10.1016/j.ejbt.2018.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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208
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Acute intermittent hypoxia and rehabilitative training following cervical spinal injury alters neuronal hypoxia- and plasticity-associated protein expression. PLoS One 2018; 13:e0197486. [PMID: 29775479 PMCID: PMC5959066 DOI: 10.1371/journal.pone.0197486] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/03/2018] [Indexed: 01/24/2023] Open
Abstract
One of the most promising approaches to improve recovery after spinal cord injury (SCI) is the augmentation of spontaneously occurring plasticity in uninjured neural pathways. Acute intermittent hypoxia (AIH, brief exposures to reduced O2 levels alternating with normal O2 levels) initiates plasticity in respiratory systems and has been shown to improve recovery in respiratory and non-respiratory spinal systems after SCI in experimental animals and humans. Although the mechanism by which AIH elicits its effects after SCI are not well understood, AIH is known to alter protein expression in spinal neurons in uninjured animals. Here, we examine hypoxia- and plasticity-related protein expression using immunofluorescence in spinal neurons in SCI rats that were treated with AIH combined with motor training, a protocol which has been demonstrated to improve recovery of forelimb function in this lesion model. Specifically, we assessed protein expression in spinal neurons from animals with incomplete cervical SCI which were exposed to AIH treatment + motor training either for 1 or 7 days. AIH treatment consisted of 10 episodes of AIH: (5 min 11% O2: 5 min 21% O2) for 7 days beginning at 4 weeks post-SCI. Both 1 or 7 days of AIH treatment + motor training resulted in significantly increased expression of the transcription factor hypoxia-inducible factor-1α (HIF-1α) relative to normoxia-treated controls, in neurons both proximal (cervical) and remote (lumbar) to the SCI. All other markers examined were significantly elevated in the 7 day AIH + motor training group only, at both cervical and lumbar levels. These markers included vascular endothelial growth factor (VEGF), brain-derived neurotrophic factor (BDNF), and phosphorylated and nonphosphorylated forms of the BDNF receptor tropomyosin-related kinase B (TrkB). In summary, AIH induces plasticity at the cellular level after SCI by altering the expression of major plasticity- and hypoxia-related proteins at spinal regions proximal and remote to the SCI. These changes occur under the same AIH protocol which resulted in recovery of limb function in this animal model. Thus AIH, which induces plasticity in spinal circuitry, could also be an effective therapy to restore motor function after nervous system injury.
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209
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Lindström I, Andersson E, Dogan J. The transition state structure for binding between TAZ1 of CBP and the disordered Hif-1α CAD. Sci Rep 2018; 8:7872. [PMID: 29777197 PMCID: PMC5959852 DOI: 10.1038/s41598-018-26213-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 05/08/2018] [Indexed: 01/22/2023] Open
Abstract
Intrinsically disordered proteins (IDPs) are common in eukaryotes. However, relatively few experimental studies have addressed the nature of the rate-limiting transition state for the coupled binding and folding reactions involving IDPs. By using site-directed mutagenesis in combination with kinetics measurements we have here characterized the transition state for binding between the globular TAZ1 domain of CREB binding protein and the intrinsically disordered C-terminal activation domain of Hif-1α (Hif-1α CAD). A total of 17 Hif-1α CAD point-mutations were generated and a Φ-value binding analysis was carried out. We found that native hydrophobic binding interactions are not formed at the transition state. We also investigated the effect the biologically important Hif-1α CAD Asn-803 hydroxylation has on the binding kinetics, and found that the whole destabilization effect due the hydroxylation is within the dissociation rate constant. Thus, the rate-limiting transition state is “disordered-like”, with native hydrophobic binding contacts being formed cooperatively after the rate-limiting barrier, which is clearly shown by linear free energy relationships. The same behavior was observed in a previously characterized TAZ1/IDP interaction, which may suggest common features for the rate-limiting transition state for TAZ1/IDP interactions.
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Affiliation(s)
- Ida Lindström
- Department of Biochemistry and Biophysics, Stockholm University, 10691, Stockholm, Sweden
| | - Eva Andersson
- Department of Medical Biochemistry and Microbiology, Uppsala University, 75123, Uppsala, Sweden
| | - Jakob Dogan
- Department of Biochemistry and Biophysics, Stockholm University, 10691, Stockholm, Sweden.
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210
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p300/CBP as a Key Nutritional Sensor for Hepatic Energy Homeostasis and Liver Fibrosis. BIOMED RESEARCH INTERNATIONAL 2018; 2018:8168791. [PMID: 29862292 PMCID: PMC5976926 DOI: 10.1155/2018/8168791] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/14/2018] [Accepted: 04/12/2018] [Indexed: 12/23/2022]
Abstract
The overwhelming frequency of metabolic diseases such as obesity and diabetes are closely related to liver diseases, which might share common pathogenic signaling processes. These metabolic disorders in the presence of inflammatory response seem to be triggered by and to reside in the liver, which is the central metabolic organ that plays primary roles in regulating lipid and glucose homeostasis upon alterations of metabolic conditions. Recently, abundant emerging researches suggested that p300 and CREB binding protein (CBP) are crucial regulators of energy homeostasis and liver fibrosis through both their acetyltransferase activities and transcriptional coactivators. Plenty of recent findings demonstrated the potential roles of p300/CBP in mammalian metabolic homeostasis in response to nutrients. This review is focused on the different targets and functions of p300/CBP in physiological and pathological processes, including lipogenesis, lipid export, gluconeogenesis, and liver fibrosis, also provided some nutrients as the regulator of p300/CBP for nutritional therapeutic approaches to treat liver diseases.
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211
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Lee GY, Shin SH, Shin HW, Chun YS, Park JW. NDRG3 lowers the metastatic potential in prostate cancer as a feedback controller of hypoxia-inducible factors. Exp Mol Med 2018; 50:1-13. [PMID: 29760417 PMCID: PMC5951909 DOI: 10.1038/s12276-018-0089-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 02/23/2018] [Accepted: 02/27/2018] [Indexed: 12/20/2022] Open
Abstract
Expression of hypoxia-inducible factors (HIFs) and N-myc downstream-regulated gene 3 (NDRG3) are oxygen-dependently regulated by prolyl hydroxylase domain (PHD) enzymes. Little is known about the role of NDRG3 in the cellular adaptation to hypoxia, whereas the roles of HIFs are well understood. In this study, we investigated how NDRG3 affects the hypoxic response in prostate cancer cells. Compared with HIF-1α, hypoxic induction of NDRG3 was observed at a later phase. NDRG3 reduced hypoxic expression of HIF-1α by inhibiting AKT-driven translation of HIF1A mRNA. In addition, NDRG3 functionally inhibited HIF-1 by dissociating the coactivator p300 from HIF-1α. Accordingly, NDRG3 may fine-tune the HIF-1 signaling pathway to cope with long-term hypoxia. Of the diverse effects of HIF-1α on cancer progression, hypoxia-induced cell migration was investigated. In transwell chambers, NDRG3 negatively regulated the migration and invasion of prostate cancer cells under hypoxia. An informatics analysis using Gene Expression Omnibus (GEO) revealed that NDRG3 downregulation is associated with prostate cancer metastasis and high expression of HIF-1 downstream genes. In cancer tissue arrays, NDRG3 expression was lower in prostate cancer tissues with a Gleason score of 8 or greater and was inversely correlated with HIF-1α expression. Therefore, NDRG3 may have an anti-metastatic function in prostate cancer under a hypoxic microenvironment. A protein activated under the low oxygen conditions typical of tumor surroundings has an anti-metastatic function in prostate cancer cells. Jong-Wan Park and colleagues from Seoul National University College of Medicine, South Korea, showed in prostate cancer cells that NDRG3, a protein activated under low oxygen conditions, works to fine-tune the signaling of another oxygen-sensitive protein to deal with the long-term stress imposed by cellular conditions. As a consequence, migration and invasion of prostate cancer cells are repressed. The researchers then looked at NDRG3 expression levels in tissue samples from men with prostate cancer and found that the more aggressive the disease the lower the NDRG3 activity. The results point to NDRG3 as a tumor suppressor in prostate cancer and suggest drug strategies designed to boost its function could aid in the treatment of this disease.
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Affiliation(s)
- Ga Young Lee
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.,Department of Pharmacology, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute and Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Seung-Hyun Shin
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.,Department of Pharmacology, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute and Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun-Woo Shin
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.,Department of Pharmacology, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute and Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Yang-Sook Chun
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute and Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Jong-Wan Park
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea. .,Department of Pharmacology, Seoul National University College of Medicine, Seoul, Korea. .,Cancer Research Institute and Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea.
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212
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Serocki M, Bartoszewska S, Janaszak-Jasiecka A, Ochocka RJ, Collawn JF, Bartoszewski R. miRNAs regulate the HIF switch during hypoxia: a novel therapeutic target. Angiogenesis 2018; 21:183-202. [PMID: 29383635 PMCID: PMC5878208 DOI: 10.1007/s10456-018-9600-2] [Citation(s) in RCA: 175] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 01/22/2018] [Indexed: 12/20/2022]
Abstract
The decline of oxygen tension in the tissues below the physiological demand leads to the hypoxic adaptive response. This physiological consequence enables cells to recover from this cellular insult. Understanding the cellular pathways that mediate recovery from hypoxia is therefore critical for developing novel therapeutic approaches for cardiovascular diseases and cancer. The master regulators of oxygen homeostasis that control angiogenesis during hypoxia are hypoxia-inducible factors (HIFs). HIF-1 and HIF-2 function as transcriptional regulators and have both unique and overlapping target genes, whereas the role of HIF-3 is less clear. HIF-1 governs the acute adaptation to hypoxia, whereas HIF-2 and HIF-3 expressions begin during chronic hypoxia in human endothelium. When HIF-1 levels decline, HIF-2 and HIF-3 increase. This switch from HIF-1 to HIF-2 and HIF-3 signaling is required in order to adapt the endothelium to prolonged hypoxia. During prolonged hypoxia, the HIF-1 levels and activity are reduced, despite the lack of oxygen-dependent protein degradation. Although numerous protein factors have been proposed to modulate the HIF pathways, their application for HIF-targeted therapy is rather limited. Recently, the miRNAs that endogenously regulate gene expression via the RNA interference (RNAi) pathway have been shown to play critical roles in the hypoxia response pathways. Furthermore, these classes of RNAs provide therapeutic possibilities to selectively target HIFs and thus modulate the HIF switch. Here, we review the significance of the microRNAs on the relationship between the HIFs under both physiological and pathophysiological conditions.
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Affiliation(s)
- Marcin Serocki
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdańsk, Poland
| | - Sylwia Bartoszewska
- Department of Inorganic Chemistry, Medical University of Gdansk, Gdańsk, Poland
| | - Anna Janaszak-Jasiecka
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdańsk, Poland
| | - Renata J Ochocka
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdańsk, Poland
| | - James F Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rafał Bartoszewski
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdańsk, Poland.
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213
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Jin P, Kang J, Lee MK, Park JW. Ferritin heavy chain controls the HIF-driven hypoxic response by activating the asparaginyl hydroxylase FIH. Biochem Biophys Res Commun 2018; 499:475-481. [DOI: 10.1016/j.bbrc.2018.03.173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 03/22/2018] [Indexed: 12/20/2022]
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214
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p53 and glucose metabolism: an orchestra to be directed in cancer therapy. Pharmacol Res 2018; 131:75-86. [DOI: 10.1016/j.phrs.2018.03.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/23/2018] [Accepted: 03/20/2018] [Indexed: 12/14/2022]
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215
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Furan- and Thiophene-2-Carbonyl Amino Acid Derivatives Activate Hypoxia-Inducible Factor via Inhibition of Factor Inhibiting Hypoxia-Inducible Factor-1. Molecules 2018; 23:molecules23040885. [PMID: 29641495 PMCID: PMC6017830 DOI: 10.3390/molecules23040885] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/10/2018] [Accepted: 04/10/2018] [Indexed: 11/17/2022] Open
Abstract
Induction of a series of anti-hypoxic proteins protects cells during exposure to hypoxic conditions. Hypoxia-inducible factor-α (HIF-α) is a major transcription factor that orchestrates this protective effect. To activate HIF exogenously, without exposing cells to hypoxic conditions, many small-molecule inhibitors targeting prolyl hydroxylase domain-containing protein have been developed. In addition, suppression of factor inhibiting HIF-1 (FIH-1) has also been shown to have the potential to activate HIF-α. However, few small-molecule inhibitors of FIH-1 have been developed. In this study, we synthesized a series of furan- and thiophene-2-carbonyl amino acid derivatives having the potential to inhibit FIH-1. The inhibitory activities of these compounds were evaluated in SK-N-BE(2)c cells by measuring HIF response element (HRE) promoter activity. Several furan- and thiophene-2-carbonyl amino acid derivatives inhibited FIH-1 based on correlations among the docking score of the FIH-1 active site, the chemical structure of the compounds, and biological HIF-α/HRE transcriptional activity.
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216
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The Factor Inhibiting HIF Asparaginyl Hydroxylase Regulates Oxidative Metabolism and Accelerates Metabolic Adaptation to Hypoxia. Cell Metab 2018; 27:898-913.e7. [PMID: 29617647 PMCID: PMC5887987 DOI: 10.1016/j.cmet.2018.02.020] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 12/29/2017] [Accepted: 02/20/2018] [Indexed: 01/16/2023]
Abstract
Animals require an immediate response to oxygen availability to allow rapid shifts between oxidative and glycolytic metabolism. These metabolic shifts are highly regulated by the HIF transcription factor. The factor inhibiting HIF (FIH) is an asparaginyl hydroxylase that controls HIF transcriptional activity in an oxygen-dependent manner. We show here that FIH loss increases oxidative metabolism, while also increasing glycolytic capacity, and that this gives rise to an increase in oxygen consumption. We further show that the loss of FIH acts to accelerate the cellular metabolic response to hypoxia. Skeletal muscle expresses 50-fold higher levels of FIH than other tissues: we analyzed skeletal muscle FIH mutants and found a decreased metabolic efficiency, correlated with an increased oxidative rate and an increased rate of hypoxic response. We find that FIH, through its regulation of oxidation, acts in concert with the PHD/vHL pathway to accelerate HIF-mediated metabolic responses to hypoxia.
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217
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Hussain MS, Tripathi V. Smoking under hypoxic conditions: a potent environmental risk factor for inflammatory and autoimmune diseases. Mil Med Res 2018; 5:11. [PMID: 29598831 PMCID: PMC5877397 DOI: 10.1186/s40779-018-0158-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 03/14/2018] [Indexed: 12/15/2022] Open
Abstract
Autoimmune disease management presents a significant challenge to medical science. Environmental factors potentially increase the risk of developing inflammatory and autoimmune diseases, such as multiple sclerosis, rheumatoid arthritis, and lupus. Among various environmental stresses, cigarette smoke and hypoxia have both been reported to lead to an enhanced risk of inflammatory and autoimmune diseases.In this review, we shed light on all reported mechanisms whereby cigarette smoke and a hypoxic environment can induce inflammatory and autoimmune diseases and discuss how hypoxic conditions influence the cigarette smoke-induced threat of inflammatory and autoimmune disease development.Cigarette smoke and hypoxia both lead to increased oxidative stress and production of reactive oxygen species and other free radicals, which have various effects including the generation of autoreactive pro-inflammatory T cells and autoantibodies, reductions in T regulatory (Treg) cell activity, and enhanced expression of pro-inflammatory mediators [e.g., interleukin-6 (IL-6), interleukin-4 (IL-4) and interleukin-8 (IL-8)]. Accordingly, smoking and hypoxic environments may synergistically act as potent environmental risk factors for inflammatory and autoimmune diseases. To our knowledge, no studies have reported the direct association of cigarette smoke and hypoxic environments with the risk of developing inflammatory and autoimmune diseases.Future studies exploring the risk of autoimmune disease development in smokers at high altitudes, particularly military personnel and mountaineers who are not acclimatized to high-altitude regions, are required to obtain a better understanding of disease risk as well as its management.
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Affiliation(s)
- Md. Saddam Hussain
- School of Biotechnology, Gautam Buddha University, Greater Noida, Gautam Budh Nagar, Uttar Pradesh 201312 India
| | - Vishwas Tripathi
- School of Biotechnology, Gautam Buddha University, Greater Noida, Gautam Budh Nagar, Uttar Pradesh 201312 India
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218
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219
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Crowley PD, Stuttgen V, O'Carroll E, Ash SA, Buggy DJ, Gallagher HC. Exposure to 60% oxygen promotes migration and upregulates angiogenesis factor secretion in breast cancer cells. Med Gas Res 2018; 7:226-235. [PMID: 29497482 PMCID: PMC5806442 DOI: 10.4103/2045-9912.222446] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Peri-operative factors, including anaesthetic drugs and techniques, may affect cancer cell biology and clinical recurrence. In breast cancer cells, we demonstrated that sevoflurane promotes migration and angiogenesis in high fractional oxygen but not in air. Follow-up analysis of the peri-operative oxygen fraction trial found an association between high inspired oxygen during cancer surgery and reduced tumor-free survival. Here we evaluated effects of acute, high oxygen exposure on breast cancer cell viability, migration and secretion of angiogenesis factors in vitro. MDA-MB-231 and MCF-7 breast cancer cells were exposed to 21%, 30%, 60%, or 80% v/v O2 for 3 hours. Cell viability at 24 hours was determined by MTT and migration at 24 hours with the Oris™ Cell Migration Assay. Secretion of angiogenesis factors at 24 hours was measured via membrane-based immunoarray. Exposure to 30%, 60% or 80% oxygen did not affect cell viability. Migration of MDA-MB-231 and MCF-7 cells was increased by 60% oxygen (P = 0.012 and P = 0.007, respectively) while 30% oxygen increased migration in MCF-7 cells (P = 0.011). These effects were reversed by dimethyloxaloylglycine. In MDA-MB-231 cells high fractional oxygen increased secretion of angiogenesis factors monocyte chemotactic protein 1, regulated on activation normal T-cell expressed and vascular endothelial growth factor. In MCF-7 cells, interleukin-8, angiogenin and vascular endothelial growth factor secretion was significantly increased by high fractional oxygen. High oxygen exposure stimulates migration and secretion of angiogenesis factors in breast cancer cells in vitro.
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Affiliation(s)
- Peter D Crowley
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Vivian Stuttgen
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland.,School of Veterinary Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Emma O'Carroll
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Simon A Ash
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland.,Discipline of Anesthesia, Memorial University, Canada
| | - Donal J Buggy
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland.,Mater Misericordiae University Hospital, Dublin, Ireland.,Outcomes Research Consortium, Cleveland Clinic, Cleveland, OH, USA.,UCD-Mater Clinical Research Centre, Catherine McCauley Centre, Dublin, Ireland
| | - Helen C Gallagher
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland.,UCD-Mater Clinical Research Centre, Catherine McCauley Centre, Dublin, Ireland
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220
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Hypoxia-Inducible Factor-1α in Antarctic notothenioids contains a polyglutamine and glutamic acid insert that varies in length with phylogeny. Polar Biol 2018; 40:2537-2545. [PMID: 29430077 DOI: 10.1007/s00300-017-2164-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The long evolution of the Antarctic perciform suborder of Notothenioidei in the icy, oxygen-rich waters of the Southern Ocean may have reduced selective pressure to maintain a hypoxic response. To test this hypothesis, cDNA of the key transcriptional regulator of hypoxic genes, hypoxia-inducible factor-1α (HIF-1α), was sequenced in heart ventricles of the red-blooded notothenioid, Notothenia coriiceps, and the hemoglobinless icefish, Chaenocephalus aceratus. HIF-1α cDNA is 4500 base pairs (bp) long and encodes 755 amino acids in N. coriiceps, and in C. aceratus, HIF-1α is 3576 bp long and encodes 779 amino acids. All functional domains of HIF-1α are highly conserved compared to other teleosts, but HIF-1α contains a polyglutamine/glutamic acid (polyQ/E) insert 9 amino acids long in N. coriiceps and 34 amino acids long in C. aceratus. Sequencing of this region in four additional species, representing three families of notothenioids, revealed that the length of the polyQ/E insert varies with phylogeny. Icefishes, the crown family of notothenioids, contain the longest polyQ/E inserts, ranging between16 and 34 amino acids long, whereas the basal, cold-temperate notothenioid, Eleginops maclovinus, contains a polyQ/E insert only 4 amino acids long. PolyQ/E inserts may affect dimerization of HIF-1α and HIF-1β, HIF-1 translocation into the nucleus and/or DNA binding.
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221
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USP9X destabilizes pVHL and promotes cell proliferation. Oncotarget 2018; 7:60519-60534. [PMID: 27517496 PMCID: PMC5312400 DOI: 10.18632/oncotarget.11139] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 07/26/2016] [Indexed: 11/29/2022] Open
Abstract
Numerous mutations of the Von Hippel-Lindau (VHL) gene have been reported to cause dysfunction of VHL protein (pVHL) and lead to processes related to tumor progression. pVHL acts as an E3 ligase and degrades downstream targets, such as hypoxia-inducible transcription factor (HIF) which is essential for tumor growth. Previous studies reported reduction of VHL protein, rather than mRNA in VHL-related tumor patients, suggesting that instability of the pVHL protein itself is a primary cause of dysfunction. Regulation of pVHL stability has therefore been a major focus of research. We report that ubiquitin-specific protease 9X (USP9X), which is a deubiquitinase binds and promotes degradation of both wild-type and mutants of pVHL that retain E3 ligase function, thus activating the HIF pathway. USP9X degrades pVHL through protection of its substrate, the newly identified pVHL E3 ligase Smurf1. In addition, USP9X activates glycolysis and promotes cell proliferation through pVHL. Treatment with a USP9X inhibitor shows an effect similar to USP9X knockdown in pVHL induction, and suppresses HIF activity. Our findings demonstrate that USP9X is a novel regulator of pVHL stability, and USP9X may be a therapeutic target for treatment of VHL-related tumors.
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Kaplan JM, Sharma N, Dikdan S. Hypoxia-Inducible Factor and Its Role in the Management of Anemia in Chronic Kidney Disease. Int J Mol Sci 2018; 19:ijms19020389. [PMID: 29382128 PMCID: PMC5855611 DOI: 10.3390/ijms19020389] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/04/2018] [Accepted: 01/08/2018] [Indexed: 12/25/2022] Open
Abstract
Hypoxia-inducible factor (HIF) plays a crucial role in the response to hypoxia at the cellular, tissue, and organism level. New agents under development to pharmacologically manipulate HIF may provide new and exciting possibilities in the treatment of anemia of chronic kidney disease (CKD) as well as in multiple other disease states involving ischemia-reperfusion injury. This article provides an overview of recent studies describing current standards of care for patients with anemia in CKD and associated clinical issues, and those supporting the clinical potential for targeting HIF stabilization with HIF prolyl-hydroxylase inhibitors (HIF-PHI) in these patients. Additionally, articles reporting the clinical potential for HIF-PHIs in 'other' putative therapeutic areas, the tissue and intracellular distribution of HIF- and prolyl-hydroxylase domain (PHD) isoforms, and HIF isoforms targeted by the different PHDs, were identified. There is increasing uncertainty regarding the optimal treatment for anemia of CKD with poorer outcomes associated with treatment to higher hemoglobin targets, and the increasing use of iron and consequent risk of iron imbalance. Attainment and maintenance of more physiologic erythropoietin levels associated with HIF stabilization may improve the management of patients resistant to treatment with erythropoiesis-stimulating agents and improve outcomes at higher hemoglobin targets.
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Affiliation(s)
- Joshua M Kaplan
- Division of Nephrology and Hypertension, Rutgers-New Jersey Medical School, University Hospital, 185 South Orange Avenue, I512, Newark, NJ 07103, USA.
| | - Neeraj Sharma
- Division of Nephrology and Hypertension, Rutgers-New Jersey Medical School, University Hospital, 185 South Orange Avenue, I512, Newark, NJ 07103, USA.
| | - Sean Dikdan
- Division of Nephrology and Hypertension, Rutgers-New Jersey Medical School, University Hospital, 185 South Orange Avenue, I512, Newark, NJ 07103, USA.
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223
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Koyasu S, Kobayashi M, Goto Y, Hiraoka M, Harada H. Regulatory mechanisms of hypoxia-inducible factor 1 activity: Two decades of knowledge. Cancer Sci 2018; 109:560-571. [PMID: 29285833 PMCID: PMC5834787 DOI: 10.1111/cas.13483] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 12/09/2017] [Accepted: 12/24/2017] [Indexed: 12/12/2022] Open
Abstract
Hypoxia‐inducible factor 1 (HIF‐1) is a transcriptional activator of various genes related to cellular adaptive responses to hypoxia. Dysfunctions in the regulatory systems of HIF‐1 activity have been implicated in the pathogenesis of various diseases including malignant tumors and, thus, elucidating the molecular mechanisms underlying the activation of HIF‐1 is eagerly desired for the development of novel anti‐cancer strategies. The importance of oxygen‐dependent and ubiquitin‐mediated proteolysis of the regulatory subunit of HIF‐1 (HIF‐1α) was first reported in 1997. Since then, accumulating evidence has shown that HIF‐1α may become stable and active even under normoxic conditions; for example, when disease‐associated genetic and functional alterations in some genes trigger the aberrant activation of HIF‐1 regardless of oxygen conditions. We herein review the last two decades of knowledge, since 1997, on the regulatory mechanisms of HIF‐1 activity from conventional oxygen‐ and proteolysis‐dependent mechanisms to up‐to‐the‐minute information on cancer‐associated genetic and functional alteration‐mediated mechanisms.
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Affiliation(s)
- Sho Koyasu
- Laboratory of Cancer Cell Biology, Department of Genome Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan.,Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Minoru Kobayashi
- Laboratory of Cancer Cell Biology, Department of Genome Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan
| | - Yoko Goto
- Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masahiro Hiraoka
- Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hiroshi Harada
- Laboratory of Cancer Cell Biology, Department of Genome Dynamics, Radiation Biology Center, Kyoto University, Kyoto, Japan.,Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency (JST), Saitama, Japan
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224
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Mass Spectrometry and Bioinformatic Analysis of Hydroxylation-Dependent Protein-Protein Interactions. Methods Mol Biol 2018; 1742:27-36. [PMID: 29330787 DOI: 10.1007/978-1-4939-7665-2_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Characterization of how a stimulus regulates the dynamics of protein-protein interaction is critical for understanding how a particular protein is regulated in an intracellular signaling network. Protein hydroxylation, which is a posttranslational modification catalyzed by oxygen-dependent enzymes, is a crucial regulator of protein-protein interactions. Under low oxygen conditions, the activity of many hydroxylases is inhibited, which results in a reduction of substrate hydroxylation. These changes alter the interactome of the substrate, and this dynamic rewiring of signaling networks explains crucial aspects of the adaptive response to hypoxia. In order to fully understand the systemic role of hydroxylation, it is necessary to identify a comprehensive set of substrates, as well as to determine which residues are hydroxylated. In addition, hydroxylation-dependent changes in the interactome of the substrates are indicative of the molecular function of the modification. To identify new substrates of hydroxylases, we have developed an approach involving the use of a pharmacological substrate-trap strategy followed by label-free quantitative mass spectrometry. An overview is provided for the sample preparation, mass spectrometry techniques, and statistical analysis used for detection of new substrates, hydroxylated residue, and hydroxylation-dependent protein-protein interaction changes.
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225
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FIH Is an Oxygen Sensor in Ovarian Cancer for G9a/GLP-Driven Epigenetic Regulation of Metastasis-Related Genes. Cancer Res 2017; 78:1184-1199. [DOI: 10.1158/0008-5472.can-17-2506] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 11/01/2017] [Accepted: 12/15/2017] [Indexed: 11/16/2022]
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226
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Duran CL, Howell DW, Dave JM, Smith RL, Torrie ME, Essner JJ, Bayless KJ. Molecular Regulation of Sprouting Angiogenesis. Compr Physiol 2017; 8:153-235. [PMID: 29357127 DOI: 10.1002/cphy.c160048] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The term angiogenesis arose in the 18th century. Several studies over the next 100 years laid the groundwork for initial studies performed by the Folkman laboratory, which were at first met with some opposition. Once overcome, the angiogenesis field has flourished due to studies on tumor angiogenesis and various developmental models that can be genetically manipulated, including mice and zebrafish. In addition, new discoveries have been aided by the ability to isolate primary endothelial cells, which has allowed dissection of various steps within angiogenesis. This review will summarize the molecular events that control angiogenesis downstream of biochemical factors such as growth factors, cytokines, chemokines, hypoxia-inducible factors (HIFs), and lipids. These and other stimuli have been linked to regulation of junctional molecules and cell surface receptors. In addition, the contribution of cytoskeletal elements and regulatory proteins has revealed an intricate role for mobilization of actin, microtubules, and intermediate filaments in response to cues that activate the endothelium. Activating stimuli also affect various focal adhesion proteins, scaffold proteins, intracellular kinases, and second messengers. Finally, metalloproteinases, which facilitate matrix degradation and the formation of new blood vessels, are discussed, along with our knowledge of crosstalk between the various subclasses of these molecules throughout the text. Compr Physiol 8:153-235, 2018.
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Affiliation(s)
- Camille L Duran
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - David W Howell
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Jui M Dave
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Rebecca L Smith
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Melanie E Torrie
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Jeffrey J Essner
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Kayla J Bayless
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
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227
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Latha MS, Saddala MS. Molecular docking based screening of a simulated HIF-1 protein model for potential inhibitors. Bioinformation 2017; 13:388-393. [PMID: 29225432 PMCID: PMC5712784 DOI: 10.6026/97320630013388] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/03/2017] [Accepted: 12/04/2017] [Indexed: 11/23/2022] Open
Abstract
Hypoxia inducible factor-1(HIF-1) is a bHLH-family transcription factor that control genes involved in glucolysis, angiogenesis, migration, as well as invasion factors that are important for tumor progression and metastasis. HIF-1, a hetero dimer of HIF-1α and HIF-1β, binds to the hypoxia responsive genes, such as vascular endothelial growth factor (VEGF). It is one the molecular target for angiogenesis. A series of Chalcone - like compounds described that preferentially inhibit HIF-1 dimer, which can interact with amino acids within the active site of the protein. It is of interest model the HIF-1 dimer protein and protein was subjected to molecular dynamics simulations using NAMD 2.9 software with CHARMM27 force field in water and the protein structure was minimized with 25000 steps for 500 ps and simulation with 1000000 steps for 2ns. 2500 compounds were screened from Zinc database through structure based virtual screening with references to Chalcone natural drug compound. The screened compounds were docked into the active site of the protein using AutoDock Vina in PyRx Virtual screening tool. The docking result showed the compounds Zinc04280532, Zinc04280533, Zinc04280469, Zinc04280534, Zinc16405915, Zinc04277060, Zinc04280538, Zinc04582923, Zinc05280554 and Zinc05943723 have high binding affinities then query compound. The lead hit compounds were also testing for toxicity and bioavailability using Osiris and Molinspiration online server. The active site amino acids such as TYR-21, ASN-34, VAL-35, MET-18, LYS-17, SER-36, ARG- 46 and ARG-14 are key role in the inhibitors activity. This is useful in the design of small molecule therapeutics or the treatment of different abnormalities associated with impaired HIF-1α.
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Affiliation(s)
- Mundla Sri Latha
- Department of Biotechnology, Sri Venkateswara University, Tirupati - 517502, A.P., India
| | - Madhu Sudhana Saddala
- Centre for agricultural Bioinformatics, ICAR-IASRI (Indian Agricultural Statistics Research Institute), Library Avenue, Pusa, New Delhi - 110012, India
- Johns Hopkins University, Wilmer's Eye Institute, School of Medicine, Baltimore, Maryland
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228
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Iommarini L, Porcelli AM, Gasparre G, Kurelac I. Non-Canonical Mechanisms Regulating Hypoxia-Inducible Factor 1 Alpha in Cancer. Front Oncol 2017; 7:286. [PMID: 29230384 PMCID: PMC5711814 DOI: 10.3389/fonc.2017.00286] [Citation(s) in RCA: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/13/2017] [Indexed: 12/21/2022] Open
Abstract
Hypoxia-inducible factor 1 alpha (HIF-1α) orchestrates cellular adaptation to low oxygen and nutrient-deprived environment and drives progression to malignancy in human solid cancers. Its canonical regulation involves prolyl hydroxylases (PHDs), which in normoxia induce degradation, whereas in hypoxia allow stabilization of HIF-1α. However, in certain circumstances, HIF-1α regulation goes beyond the actual external oxygen levels and involves PHD-independent mechanisms. Here, we gather and discuss the evidence on the non-canonical HIF-1α regulation, focusing in particular on the consequences of mitochondrial respiratory complexes damage on stabilization of this pleiotropic transcription factor.
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Affiliation(s)
- Luisa Iommarini
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, Bologna, Italy
| | - Anna Maria Porcelli
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, Bologna, Italy
| | - Giuseppe Gasparre
- Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
| | - Ivana Kurelac
- Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
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229
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Madrigal-Martínez A, Fernández-Martínez AB, Lucio Cazaña FJ. Intracrine prostaglandin E 2 pro-tumoral actions in prostate epithelial cells originate from non-canonical pathways. J Cell Physiol 2017; 233:3590-3602. [PMID: 29154474 DOI: 10.1002/jcp.26220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/29/2017] [Indexed: 12/21/2022]
Abstract
Prostaglandin E2 (PGE2 ) increases cell proliferation and stimulates migratory and angiogenic abilities in prostate cancer cells. However, the effects of PGE2 on non-transformed prostate epithelial cells are unknown, despite the fact that PGE2 overproduction has been found in benign hyperplastic prostates. In the present work we studied the effects of PGE2 in immortalized, non-malignant prostate epithelial RWPE-1 cells and found that PGE2 increased cell proliferation, cell migration, and production of vascular endothelial growth factor-A, and activated in vitro angiogenesis. These actions involved a non-canonic intracrine mechanism in which the actual effector was intracellular PGE2 (iPGE2 ) instead of extracellular PGE2 : inhibition of the prostaglandin uptake transporter (PGT) or antagonism of EP receptors prevented the effects of PGE2 , which indicated that PGE2 activity depended on its carrier-mediated translocation from the outside to the inside of cells and that EP receptors located intracellularly (iEP) mediated the effects of PGE2 . iPGE2 acted through transactivation of epidermal growth factor-receptor (EGFR) by iEP, leading to increased expression and activity of hypoxia-inducible factor-1α (HIF-1α). Interestingly, iPGE2 also mediates the effects of PGE2 on prostate cancer PC3 cells through the axis iPGE2 -iEP receptors-EGFR-HIF-1α. Thus, this axis might be responsible for the growth-stimulating effects of PGE2 on prostate epithelial cells, thereby contributing to prostate proliferative diseases associated with chronic inflammation. Since this PGT-dependent non-canonic intracrine mechanism of PGE2 action operates in both benign and malignant prostate epithelial cells, PGT inhibitors should be tested as a novel therapeutic modality to treat prostate proliferative disease.
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230
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Structural and functional analysis of coral Hypoxia Inducible Factor. PLoS One 2017; 12:e0186262. [PMID: 29117182 PMCID: PMC5695583 DOI: 10.1371/journal.pone.0186262] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 09/28/2017] [Indexed: 12/30/2022] Open
Abstract
Tissues of symbiotic Cnidarians are exposed to wide, rapid and daily variations of oxygen concentration. Indeed, during daytime, intracellular O2 concentration increases due to symbiont photosynthesis, while during night, respiration of both host cells and symbionts leads to intra-tissue hypoxia. The Hypoxia Inducible Factor 1 (HIF-1) is a heterodimeric transcription factor used for maintenance of oxygen homeostasis and adaptation to hypoxia. Here, we carried out a mechanistic study of the response to variations of O2 concentrations of the coral model Stylophora pistillata. In silico analysis showed that homologs of HIF-1 α (SpiHIF-1α) and HIF-1β (SpiHIF-1β) exist in coral. A specific SpiHIF-1 DNA binding on mammalian Hypoxia Response Element (HRE) sequences was shown in extracts from coral exposed to dark conditions. Then, we cloned the coral HIF-1α and β genes and determined their expression and transcriptional activity. Although HIF-1α has an incomplete Oxygen-dependent Degradation Domain (ODD) relative to its human homolog, its protein level is increased under hypoxia when tested in mammalian cells. Moreover, co-transfection of SpiHIF-1α and β in mammalian cells stimulated an artificial promoter containing HRE only in hypoxic conditions. This study shows the strong conservation of molecular mechanisms involved in adaptation to O2 concentration between Cnidarians and Mammals whose ancestors diverged about 1,200-1,500 million years ago.
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231
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Yeh TL, Leissing TM, Abboud MI, Thinnes CC, Atasoylu O, Holt-Martyn JP, Zhang D, Tumber A, Lippl K, Lohans CT, Leung IKH, Morcrette H, Clifton IJ, Claridge TDW, Kawamura A, Flashman E, Lu X, Ratcliffe PJ, Chowdhury R, Pugh CW, Schofield CJ. Molecular and cellular mechanisms of HIF prolyl hydroxylase inhibitors in clinical trials. Chem Sci 2017; 8:7651-7668. [PMID: 29435217 PMCID: PMC5802278 DOI: 10.1039/c7sc02103h] [Citation(s) in RCA: 168] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 09/07/2017] [Indexed: 02/06/2023] Open
Abstract
Inhibition of the human 2-oxoglutarate (2OG) dependent hypoxia inducible factor (HIF) prolyl hydroxylases (human PHD1-3) causes upregulation of HIF, thus promoting erythropoiesis and is therefore of therapeutic interest. We describe cellular, biophysical, and biochemical studies comparing four PHD inhibitors currently in clinical trials for anaemia treatment, that describe their mechanisms of action, potency against isolated enzymes and in cells, and selectivities versus representatives of other human 2OG oxygenase subfamilies. The 'clinical' PHD inhibitors are potent inhibitors of PHD catalyzed hydroxylation of the HIF-α oxygen dependent degradation domains (ODDs), and selective against most, but not all, representatives of other human 2OG dependent dioxygenase subfamilies. Crystallographic and NMR studies provide insights into the different active site binding modes of the inhibitors. Cell-based results reveal the inhibitors have similar effects on the upregulation of HIF target genes, but differ in the kinetics of their effects and in extent of inhibition of hydroxylation of the N- and C-terminal ODDs; the latter differences correlate with the biophysical observations.
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Affiliation(s)
- Tzu-Lan Yeh
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
- Target Discovery Institute (TDI) , Nuffield Department of Medicine , University of Oxford , NDMRB Roosevelt Drive , Oxford OX3 7FZ , UK
| | - Thomas M Leissing
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
- Ludwig Institute for Cancer Research , Nuffield Department of Clinical Medicine , University of Oxford , Oxford OX3 7DQ , UK
| | - Martine I Abboud
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Cyrille C Thinnes
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Onur Atasoylu
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - James P Holt-Martyn
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Dong Zhang
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Anthony Tumber
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
- Structural Genomics Consortium (SGC) , University of Oxford , Oxford OX3 7DQ , UK
| | - Kerstin Lippl
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Christopher T Lohans
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Ivanhoe K H Leung
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Helen Morcrette
- Radcliffe Department of Medicine , Division of Cardiovascular Medicine , BHF Centre of Research Excellence , Wellcome Trust Centre for Human Genetics , Roosevelt Drive , Oxford OX3 7BN , UK
| | - Ian J Clifton
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Timothy D W Claridge
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Akane Kawamura
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
- Radcliffe Department of Medicine , Division of Cardiovascular Medicine , BHF Centre of Research Excellence , Wellcome Trust Centre for Human Genetics , Roosevelt Drive , Oxford OX3 7BN , UK
| | - Emily Flashman
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Xin Lu
- Ludwig Institute for Cancer Research , Nuffield Department of Clinical Medicine , University of Oxford , Oxford OX3 7DQ , UK
| | - Peter J Ratcliffe
- Target Discovery Institute (TDI) , Nuffield Department of Medicine , University of Oxford , NDMRB Roosevelt Drive , Oxford OX3 7FZ , UK
- The Francis Crick Institute , 1 Midland Road , London NW1 1AT , UK
| | - Rasheduzzaman Chowdhury
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
| | - Christopher W Pugh
- Target Discovery Institute (TDI) , Nuffield Department of Medicine , University of Oxford , NDMRB Roosevelt Drive , Oxford OX3 7FZ , UK
| | - Christopher J Schofield
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , Oxford OX1 3TA , UK .
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232
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Wang X, Zhang Y, Jiang BH, Zhang Q, Zhou RP, Zhang L, Wang C. Study on the role of Hsa-miR-31-5p in hypertrophic scar formation and the mechanism. Exp Cell Res 2017; 361:201-209. [PMID: 29056521 DOI: 10.1016/j.yexcr.2017.09.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 11/26/2022]
Abstract
Hypertrophic scar (HS) formation is associated with the fibrosis of fibrocytes caused by excessive extracellular matrix (ECM) synthesis and deposition, the initial event of HS formation. Our high throughput screen of miRNA expression profiles identified hsa-miR31-5p, whose transcription level was most differentially in normal skin fibroblasts (NS) and HS among other miRNAs. The level of hsa-miR31-5p in HS was significantly higher than in NS. In-vitro functional experiments showed hsa-miR31-5p knockdown remarkably suppressed the proliferation of hypertrophic scar fibroblasts (HSFBs) under hypoxia, promoted cell invasion, and inhibited the expression of Collagen I and III and Fibronectin (FN), suggesting that hsa-miR31-5p knockdown effectively reduces HS formation caused by excessive ECM synthesis and deposition in HSFBs under hypoxia. Mechanism study showed that the regulation of HS formation by hsa-miR31-5p was mediated by its target gene, factor-inhibiting HIF-1 (FIH): under hypoxia, hsa-miR31-5p down-regulated FIH and thus increased the level of hypoxia inducible factor-1α (HIF-1α), which subsequently activated the HIF-1α fibrosis regulation pathway in HSFBs, and stimulated the proliferation and ECM synthesis in HSFBs, eventually resulting in fibrosis and scar formation. The data also show that knockdown of hsa-miR31-5p in HSFBs impaired the trend of increased proliferation, reduced invasion and excessive ECM synthesis and deposition caused by HIF-1a activation under hypoxia through upregulating FIH, indicating that knockdown of hsa-miR31-5p effectively inhibits the formation of HS. In conclusion, hsa-miR31 -5p plays an important role in HS formation by inhibiting FIH and regulating the HIF-1α pathway. Therefore, hsa-miR31 -5p may be a novel therapeutic target for HS.
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Affiliation(s)
- X Wang
- Department of Dermatology and Dermatologic Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - Y Zhang
- Department of Orthopedics, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai 200065, PR China
| | - B H Jiang
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, An'hui, PR China
| | - Q Zhang
- People's Hospital of Dancheng County, Dancheng City, Henan Province, PR China
| | - R P Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai 200011, PR China
| | - L Zhang
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, An'hui, PR China.
| | - Chen Wang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai 200011, PR China.
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233
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Hou X, Zhang J, Wang Y, Xiong W, Mi J. TGFBR-IDH1-Cav1 axis promotes TGF-β signalling in cancer-associated fibroblast. Oncotarget 2017; 8:83962-83974. [PMID: 29137396 PMCID: PMC5663568 DOI: 10.18632/oncotarget.20861] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 08/23/2017] [Indexed: 11/25/2022] Open
Abstract
TGF-β signalling plays an important role in fibroblasts activation and tumour progression. Here, we report that the TGFBR-IDH1-Cav1 axis promotes TGF- β signalling in fibroblasts. Our data demonstrated that IDH1 was downregulated by TGF-β signalling in fibroblasts, and downregulation of IDH1 increased cellular concentration of α-ketoglutarate (α-KG) by accelerating glutamine metabolization. Interestingly, α-KG suppressed Cav1 expression through reducing the trimethylation of histone H3K4. Furthermore, Cav1 downregulation inhibited TGFBR protein degradation. In turn, the activated TGFBR promoted TGF-β signalling. These findings demonstrated that metabolic enzyme IDH1 regulates TGF-β signalling by feedback mechanism through α-KG and TGFBR-IDH1-Cav1 axis is important for TGF-β signalling.
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Affiliation(s)
- Xiaodan Hou
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Center of Systems Medicine, Chinese Academy of Medical Sciences, Suzhou Institute of Systems Medicine, Suzhou, China
| | - Jieying Zhang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yongbin Wang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wujun Xiong
- Shanghai East Hospital, Affiliated to Tongji University, Shanghai, China
| | - Jun Mi
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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234
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Roscigno G, Puoti I, Giordano I, Donnarumma E, Russo V, Affinito A, Adamo A, Quintavalle C, Todaro M, Vivanco MDM, Condorelli G. MiR-24 induces chemotherapy resistance and hypoxic advantage in breast cancer. Oncotarget 2017; 8:19507-19521. [PMID: 28061479 PMCID: PMC5386701 DOI: 10.18632/oncotarget.14470] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 11/30/2016] [Indexed: 12/18/2022] Open
Abstract
Breast cancer remains one of the leading causes of cancer mortality among women. It has been proved that the onset of cancer depends on a very small pool of tumor cells with a phenotype similar to that of normal adult stem cells. Cancer stem cells (CSC) possess self-renewal and multilineage differentiation potential as well as a robust ability to sustain tumorigenesis. Evidence suggests that CSCs contribute to chemotherapy resistance and to survival under hypoxic conditions. Interestingly, hypoxia in turn regulates self-renewal in CSCs and these effects may be primarily mediated by hypoxic inducible factors (HIFs). Recently, microRNAs (miRNAs) have emerged as critical players in the maintenance of pluripotency and self-renewal in normal and cancer stem cells. Here, we demonstrate that miR-24 is upregulated in breast CSCs and that its overexpression increases the number of mammospheres and the expression of stem cell markers. MiR-24 also induces apoptosis resistance through the regulation of BimL expression. Moreover, we identify a new miR-24 target, FIH1, which promotes HIFα degradation: miR-24 increases under hypoxic conditions, causing downregulation of FIH1 and upregulation of HIF1α. In conclusion, miR-24 hampers chemotherapy-induced apoptosis in breast CSCs and increases cell resistance to hypoxic conditions through an FIH1−HIFα pathway.
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Affiliation(s)
- Giuseppina Roscigno
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy.,IEOS, CNR, Naples, Italy
| | - Ilaria Puoti
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy.,IEOS, CNR, Naples, Italy
| | - Immacolata Giordano
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy
| | | | - Valentina Russo
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy
| | - Alessandra Affinito
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy
| | - Assunta Adamo
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy
| | - Cristina Quintavalle
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy.,IEOS, CNR, Naples, Italy
| | - Matilde Todaro
- Department of Pathobiology and Medical Biotechnology, University of Palermo, Palermo, Italy
| | - Maria dM Vivanco
- CIC bioGUNE, Centre for Cooperative Research in Biosciences, Derio, Spain
| | - Gerolama Condorelli
- Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy.,IEOS, CNR, Naples, Italy
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235
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Olmos G, Muñoz-Félix JM, Mora I, Müller AG, Ruiz-Torres MP, López-Novoa JM, Rodríguez-Puyol D. Impaired erythropoietin synthesis in chronic kidney disease is caused by alterations in extracellular matrix composition. J Cell Mol Med 2017; 22:302-314. [PMID: 28857467 PMCID: PMC5742742 DOI: 10.1111/jcmm.13319] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 06/25/2017] [Indexed: 11/28/2022] Open
Abstract
Renal fibrosis and anaemia are two of the most relevant events in chronic kidney disease. Fibrosis is characterized by the accumulation of extracellular matrix proteins in the glomeruli and tubular interstitium. Anaemia is the consequence of a decrease in erythropoietin production in fibrotic kidneys. This work analyses the possibility that the accumulation of abnormal collagens in kidney interstitium could be one of the mechanisms responsible for erythropoietin decreased synthesis. In renal interstitial fibroblast grown on collagen I, erythropoietin mRNA expression and HIF‐2α protein decreased, whereas focal adhesion kinase protein (FAK) phosphorylation and proteasome activity increased, compared to cells grown on collagen IV. Proteasome inhibition or FAK inactivation in cells plated on collagen I restored erythropoietin and HIF‐2α expression. FAK inhibition also decreased the collagen I‐dependent proteasome activation. In a model of tubulointerstitial fibrosis induced by unilateral ureteral obstruction in mice, increased collagen I protein content and an almost complete disappearance of erythropoietin mRNA expression were observed in the ureteral ligated kidney with respect to the contralateral control. Interestingly, erythropoietin synthesis was recovered in obstructed mice treated with proteasome inhibitor. These data suggest that reduced kidney erythropoietin synthesis could be caused by the accumulation of abnormal extracellular matrix proteins.
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Affiliation(s)
- Gemma Olmos
- Department of System Biology, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.,REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain
| | - José M Muñoz-Félix
- REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain.,Department of Physiology and Pharmacology, Universidad de Salamanca, Salamanca, Spain.,Centre for Tumour Biology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Inés Mora
- REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain
| | - Anton Gerhard Müller
- Department of Nephrology and Rheumatology, University Medical Center Goettingen, University Goettingen, Goettingen, Germany
| | - Maria Piedad Ruiz-Torres
- Department of System Biology, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.,REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain
| | - José M López-Novoa
- REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain.,Department of Physiology and Pharmacology, Universidad de Salamanca, Salamanca, Spain.,Instituto de Investigaciones Biomédicas de Salamanca (IBSAL), Salamanca, Spain
| | - Diego Rodríguez-Puyol
- REDinREN (Instituto de Salud Carlos III), Madrid, Spain.,IRSIN, Instituto Reina Sofía de Investigaciones Nefrológicas, Madrid, Spain.,Research Unit and Nephrology Section, Hospital Príncipe de Asturias and Department of Medicine, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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236
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Bowser JL, Lee JW, Yuan X, Eltzschig HK. The hypoxia-adenosine link during inflammation. J Appl Physiol (1985) 2017; 123:1303-1320. [PMID: 28798196 DOI: 10.1152/japplphysiol.00101.2017] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 07/18/2017] [Accepted: 08/06/2017] [Indexed: 12/23/2022] Open
Abstract
Hypoxic tissue conditions occur during a number of inflammatory diseases and are associated with the breakdown of barriers and induction of proinflammatory responses. At the same time, hypoxia is also known to induce several adaptive and tissue-protective pathways that dampen inflammation and protect tissue integrity. Hypoxia-inducible factors (HIFs) that are stabilized during inflammatory or hypoxic conditions are at the center of mediating these responses. In the past decade, several genes regulating extracellular adenosine metabolism and signaling have been identified as being direct targets of HIFs. Here, we discuss the relationship between inflammation, hypoxia, and adenosine and that HIF-driven adenosine metabolism and signaling is essential in providing tissue protection during inflammatory conditions, including myocardial injury, inflammatory bowel disease, and acute lung injury. We also discuss how the hypoxia-adenosine link can be targeted therapeutically in patients as a future treatment approach for inflammatory diseases.
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Affiliation(s)
- Jessica L Bowser
- Department of Anesthesiology, The University of Texas Health Science Center at Houston, McGovern Medical School, Houston, Texas
| | - Jae W Lee
- Department of Anesthesiology, The University of Texas Health Science Center at Houston, McGovern Medical School, Houston, Texas
| | - Xiaoyi Yuan
- Department of Anesthesiology, The University of Texas Health Science Center at Houston, McGovern Medical School, Houston, Texas
| | - Holger K Eltzschig
- Department of Anesthesiology, The University of Texas Health Science Center at Houston, McGovern Medical School, Houston, Texas
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237
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Colgan SP, Campbell EL, Kominsky DJ. Hypoxia and Mucosal Inflammation. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2017; 11:77-100. [PMID: 27193451 DOI: 10.1146/annurev-pathol-012615-044231] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Sites of inflammation are defined by significant changes in metabolic activity. Recent studies have suggested that O2 metabolism and hypoxia play a prominent role in inflammation so-called "inflammatory hypoxia," which results from a combination of recruited inflammatory cells (e.g., neutrophils and monocytes), the local proliferation of multiple cell types, and the activation of multiple O2-consuming enzymes during inflammation. These shifts in energy supply and demand result in localized regions of hypoxia and have revealed the important function off the transcription factor HIF (hypoxia-inducible factor) in the regulation of key target genes that promote inflammatory resolution. Analysis of these pathways has provided multiple opportunities for understanding basic mechanisms of inflammation and has defined new targets for intervention. Here, we review recent work addressing tissue hypoxia and metabolic control of inflammation and immunity.
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Affiliation(s)
- Sean P Colgan
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado 80045; .,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado 80045
| | - Eric L Campbell
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado 80045; .,Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado 80045
| | - Douglas J Kominsky
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado 80045.,Department of Microbiology and Immunology, Montana State University, Bozeman, Montana 59717
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238
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Zhu Y, Wang J, Meng X, Xie H, Tan J, Guo X, Han P, Wang R. A positive feedback loop promotes HIF-1α stability through miR-210-mediated suppression of RUNX3 in paraquat-induced EMT. J Cell Mol Med 2017; 21:3529-3539. [PMID: 28699703 PMCID: PMC5706527 DOI: 10.1111/jcmm.13264] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 04/28/2017] [Indexed: 01/06/2023] Open
Abstract
Irreversible pulmonary fibrosis induced by paraquat (PQ) poisoning is the major cause of death in patients with PQ poisoning. The epithelial–mesenchymal transition (EMT) is postulated to be one of the main mechanisms of pulmonary fibrosis. Here, we investigated the role of miR‐210 in PQ‐induced EMT and its relationship with hypoxia‐inducible factor‐1α (HIF‐1α). Western blotting, immunofluorescence, immunoprecipitation and other methods were used in this study. We found that miR‐210 expression was significantly increased after PQ poisoning, and it may be regulated by HIF‐1α. Overexpression of miR‐210 further increased the HIF‐1α protein level and promoted EMT. Moreover, miR‐210 knock‐down reduced the HIF‐1α protein level and decreased the degree of EMT. Runt‐related transcription factor‐3 (RUNX3), a direct target of miR‐210, was inhibited by miR‐210 in response to PQ poisoning. RUNX3 increased the hydroxylation ability of prolyl hydroxylase domain‐containing protein 2 (PHD2), a key enzyme that promotes HIF‐1α degradation. PHD2 immunoprecipitated with RUNX3 and its level changed similarly to that of RUNX3. The expression of the HIF‐1α protein was significantly reduced when RUNX3 was overexpressed. HIF‐1α protein levels were markedly increased when RUNX3 was silenced. Based on these results, a positive feedback loop may exist between miR‐210 and HIF‐1α. The mechanism may function through miR‐210‐mediated repression of RUNX3, which further decreases the hydroxylation activity of PHD2, enhances the stability of HIF‐1α, and promotes PQ‐induced EMT, aggravating the progression of pulmonary fibrosis. This study further elucidates the mechanism of PQ‐induced pulmonary fibrosis and may provide a new perspective for the future development of therapies.
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Affiliation(s)
- Yong Zhu
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Jinfeng Wang
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Xiaoxiao Meng
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Hui Xie
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Jiuting Tan
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Xinkun Guo
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Peng Han
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Ruilan Wang
- Department of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
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239
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M Gagné L, Boulay K, Topisirovic I, Huot MÉ, Mallette FA. Oncogenic Activities of IDH1/2 Mutations: From Epigenetics to Cellular Signaling. Trends Cell Biol 2017; 27:738-752. [PMID: 28711227 DOI: 10.1016/j.tcb.2017.06.002] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/11/2017] [Accepted: 06/13/2017] [Indexed: 01/03/2023]
Abstract
Gliomas and leukemias remain highly refractory to treatment, thus highlighting the need for new and improved therapeutic strategies. Mutations in genes encoding enzymes involved in the tricarboxylic acid (TCA) cycle, such as the isocitrate dehydrogenases 1 and 2 (IDH1/2), are frequently encountered in astrocytomas and secondary glioblastomas, as well as in acute myeloid leukemias; however, the precise molecular mechanisms by which these mutations promote tumorigenesis remain to be fully characterized. Gain-of-function mutations in IDH1/2 have been shown to stimulate production of the oncogenic metabolite R-2-hydroxyglutarate (R-2HG), which inhibits α-ketoglutarate (αKG)-dependent enzymes. We review recent advances on the elucidation of oncogenic functions of IDH1/2 mutations, and of the associated oncometabolite R-2HG, which link altered metabolism of cancer cells to epigenetics, RNA methylation, cellular signaling, hypoxic response, and DNA repair.
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Affiliation(s)
- Laurence M Gagné
- Centre de Recherche sur le Cancer de l'Université Laval, Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Université Laval Québec, QC, G1V 0A6, Canada; Centre Hospitalier Universitaire (CHU) de Québec - Axe Oncologie (Hôtel-Dieu de Québec), Québec City, QC, G1R 3S3, Canada
| | - Karine Boulay
- Département de Biochimie et Médecine Moléculaire, CP 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada; Chromatin Structure and Cellular Senescence Research Unit, Maisonneuve-Rosemont Hospital Research Centre, Montréal, QC, H1T 2M4, Canada; Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, QC, H3T 1E2, Canada
| | - Ivan Topisirovic
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, QC, H3T 1E2, Canada; Gerald Bronfman Department of Oncology, and Departments of Experimental Medicine, and Biochemistry, McGill University, Montreal, QC, H4A 3T2, Canada
| | - Marc-Étienne Huot
- Centre de Recherche sur le Cancer de l'Université Laval, Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Université Laval Québec, QC, G1V 0A6, Canada; Centre Hospitalier Universitaire (CHU) de Québec - Axe Oncologie (Hôtel-Dieu de Québec), Québec City, QC, G1R 3S3, Canada.
| | - Frédérick A Mallette
- Département de Biochimie et Médecine Moléculaire, CP 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada; Chromatin Structure and Cellular Senescence Research Unit, Maisonneuve-Rosemont Hospital Research Centre, Montréal, QC, H1T 2M4, Canada; Département de Médecine, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada.
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240
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Bogdanovski DA, DiFazio LT, Bogdanovski AK, Csóka B, Jordan GB, Paul ER, Antonioli L, Pilip SA, Nemeth ZH. Hypoxia-inducible-factor-1 in trauma and critical care. J Crit Care 2017; 42:207-212. [PMID: 28779702 DOI: 10.1016/j.jcrc.2017.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 06/19/2017] [Accepted: 07/11/2017] [Indexed: 12/27/2022]
Abstract
HIF-1 is a ubiquitous signaling molecule constantly expressed by the body, but is degraded during normoxic conditions. In hypoxic conditions, it persists and is active. Hypoxia is often associated with trauma due to interrupted blood flow, inflammation or other reasons, causing HIF-1 to be active in signaling and recovery. In this review, the function of HIF-1 is examined, as well as its clinical significance with regard to trauma and critical care. Using this information, we then identify potential points of treatment and intervention.
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Affiliation(s)
| | | | | | - Balázs Csóka
- Dept. of Surgery, Rutgers-New Jersey Medical School, United States.
| | | | - Elina R Paul
- Dept. of Surgery, Morristown Medical Center, United States.
| | - Luca Antonioli
- Dept. of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.
| | | | - Zoltan H Nemeth
- Dept. of Surgery, Morristown Medical Center, United States; Dept. of Surgery, Rutgers-New Jersey Medical School, United States.
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241
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Javan B, Shahbazi M. Hypoxia-inducible tumour-specific promoters as a dual-targeting transcriptional regulation system for cancer gene therapy. Ecancermedicalscience 2017; 11:751. [PMID: 28798809 PMCID: PMC5533602 DOI: 10.3332/ecancer.2017.751] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Indexed: 12/25/2022] Open
Abstract
Transcriptional targeting is the best approach for specific gene therapy. Hypoxia is a common feature of the tumour microenvironment. Therefore, targeting gene expression in hypoxic cells by placing transgene under the control of a hypoxia-responsive promoter can be a good strategy for cancer-specific gene therapy. The hypoxia-inducible gene expression system has been investigated more in suicide gene therapy and it can also be of great help in knocking down cancer gene therapy with siRNAs. However, this system needs to be optimised to have maximum efficacy with minimum side effects in normal tissues. The combination of tissue-/tumour-specific promoters with HRE core sequences has been found to enhance the specificity and efficacy of this system. In this review, hypoxia-inducible gene expression system as well as gene therapy strategies targeting tumour hypoxia will be discussed. This review will also focus on hypoxia-inducible tumour-specific promoters as a dual-targeting transcriptional regulation systems developed for cancer-specific gene therapy.
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Affiliation(s)
- Bita Javan
- Medical Cellular and Molecular Research Center, Golestan University of Medical Sciences, Gorgan 4934174515, Iran
| | - Majid Shahbazi
- Medical Cellular and Molecular Research Center, Golestan University of Medical Sciences, Gorgan 4934174515, Iran
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242
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Siswanto FM, Oguro A, Imaoka S. Chlorogenic acid modulates hypoxia response of Hep3B cells. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.pmu.2017.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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243
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Clinicopathologic and prognostic significance of immunohistochemical expression of HIF-1α, CXCR4 and CA9 in colorectal carcinoma. Pathol Res Pract 2017; 213:783-792. [DOI: 10.1016/j.prp.2017.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 04/10/2017] [Indexed: 12/12/2022]
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244
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Abstract
Endocrine is an important and tightly regulated system for maintaining body homeostasis. Endocrine glands produce hormones, which are released into blood stream to guide the target cells responding to all sorts of stimulations. For maintaining body homeostasis, the secretion and activity of a particular hormone needs to be adjusted in responding to environmental challenges such as changes in nutritional status or chronic stress. Hypoxia, a status caused by reduced oxygen availability or imbalance of oxygen consumption/supply in an organ or within a cell, is a stress that affects many physiological and pathological processes. Hypoxic stress in endocrine organs is especially critical because endocrine glands control body homeostasis. Local hypoxia affects not only the particular gland but also the downstream cells/organs regulated by hormones secreted from this gland. Hypoxia-inducible factors (HIFs) are transcription factors that function as master regulators of oxygen homeostasis. Recent studies report that aberrant expression of HIFs in endocrine organs may result in the development and/or progression of diseases including diabetes, endometriosis, infertility and cancers. In this article, we will review recent findings in HIF-mediated endocrine organ dysfunction and the systemic syndromes caused by these disorders.
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Affiliation(s)
- Hsiu-Chi Lee
- Institute of Basic Medical SciencesCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shaw-Jenq Tsai
- Institute of Basic Medical SciencesCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of PhysiologyCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
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Basudhar D, Somasundaram V, de Oliveira GA, Kesarwala A, Heinecke JL, Cheng RY, Glynn SA, Ambs S, Wink DA, Ridnour LA. Nitric Oxide Synthase-2-Derived Nitric Oxide Drives Multiple Pathways of Breast Cancer Progression. Antioxid Redox Signal 2017; 26:1044-1058. [PMID: 27464521 PMCID: PMC5488348 DOI: 10.1089/ars.2016.6813] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
SIGNIFICANCE Breast cancer is the second leading cause of cancer-related deaths among women in the United States. Development and progression of malignancy are associated with diverse cell signaling pathways that control cell proliferation, survival, motility, invasion, and metastasis. Recent Advances: An increasing number of clinical studies have implicated a strong relationship between elevated tumor nitric oxide synthase-2 (NOS2) expression and poor patient survival. CRITICAL ISSUES Herein, we review what we believe to be key mechanisms in the role(s) of NOS2-derived nitric oxide (NO) as a driver of breast cancer disease progression. High NO increases cyclooxygenase-2 activity, hypoxia inducible factor-1 alpha protein stabilization, and activation of important cell signaling pathways, including phosphoinositide 3-kinase/protein kinase B, mitogen-activated protein kinase, epidermal growth factor receptor, and Ras, through post-translational protein modifications. Moreover, dysregulated NO flux within the tumor microenvironment has other important roles, including the promotion of angiogenesis and modulation of matrix metalloproteinase/tissue inhibitor matrix metalloproteinase associated with tumor progression. FUTURE DIRECTIONS The elucidation of these and other NO-driven pathways implicates NOS2 as a key driver of breast cancer disease progression and provides a new perspective in the identification of novel targets that may be therapeutically beneficial in the treatment of estrogen receptor-negative disease. Antioxid. Redox Signal. 26, 1044-1058.
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Affiliation(s)
- Debashree Basudhar
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
| | - Veena Somasundaram
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
| | | | - Aparna Kesarwala
- Radiation Oncology Branch, National Cancer Institute, Bethesda, Maryland
| | - Julie L. Heinecke
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
| | - Robert Y. Cheng
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
| | - Sharon A. Glynn
- Pathology, Lambe Institute for Translational Research, School of Medicine, National University of Ireland, Galway, Ireland
| | - Stefan Ambs
- Laboratory of Human Carcinogenesis, National Cancer Institute, Bethesda, Maryland
| | - David A. Wink
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
| | - Lisa A. Ridnour
- Cancer and Inflammation Program, National Cancer Institute-Frederick, Frederick, Maryland
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246
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Graham AM, Presnell JS. Hypoxia Inducible Factor (HIF) transcription factor family expansion, diversification, divergence and selection in eukaryotes. PLoS One 2017; 12:e0179545. [PMID: 28614393 PMCID: PMC5470732 DOI: 10.1371/journal.pone.0179545] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 05/31/2017] [Indexed: 01/01/2023] Open
Abstract
Hypoxia inducible factor (HIF) transcription factors are crucial for regulating a variety of cellular activities in response to oxygen stress (hypoxia). In this study, we determine the evolutionary history of HIF genes and their associated transactivation domains, as well as perform selection and functional divergence analyses across their four characteristic domains. Here we show that the HIF genes are restricted to metazoans: At least one HIF-α homolog is found within the genomes of non-bilaterians and bilaterian invertebrates, while most vertebrate genomes contain between two and six HIF-α genes. We also find widespread purifying selection across all four characteristic domain types, bHLH, PAS, NTAD, CTAD, in HIF-α genes, and evidence for Type I functional divergence between HIF-1α, HIF-2α /EPAS, and invertebrate HIF genes. Overall, we describe the evolutionary histories of the HIF transcription factor gene family and its associated transactivation domains in eukaryotes. We show that the NTAD and CTAD domains appear de novo, without any appearance outside of the HIF-α subunits. Although they both appear in invertebrates as well as vertebrate HIF- α sequences, there seems to have been a substantial loss across invertebrates or were convergently acquired in these few lineages. We reaffirm that HIF-1α is phylogenetically conserved among most metazoans, whereas HIF-2α appeared later. Overall, our findings can be attributed to the substantial integration of this transcription factor family into the critical tasks associated with maintenance of oxygen homeostasis and vascularization, particularly in the vertebrate lineage.
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Affiliation(s)
- Allie M. Graham
- Department of Biology, University of Miami, Coral Gables, Florida, United States of America
- * E-mail:
| | - Jason S. Presnell
- Department of Biology, University of Miami, Coral Gables, Florida, United States of America
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247
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A Notch-independent mechanism contributes to the induction of Hes1 gene expression in response to hypoxia in P19 cells. Exp Cell Res 2017; 358:129-139. [PMID: 28602625 DOI: 10.1016/j.yexcr.2017.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 06/06/2017] [Accepted: 06/08/2017] [Indexed: 11/20/2022]
Abstract
Hes1 is a Notch target gene that plays a major role during embryonic development. Previous studies have shown that HIF-1α can interact with the Notch intracellular domain and enhance Notch target gene expression. In this study, we have identified a Notch-independent mechanism that regulates the responsiveness of the Hes1 gene to hypoxia. Using P19 cells we show that silencing the Notch DNA binding partner CSL does not prevent hypoxia-dependent upregulation of Hes1 expression. In contrast to CSL, knockdown of HIF-1α or Arnt expression prevents Hes1 induction in hypoxia. Deletion analysis of the Hes1 promoter identified a minimal region near the transcription start site that is still responsive to hypoxia. In addition, we show that mutating the GA-binding protein (GABP) motif significantly reduced Hes1 promoter-responsiveness to hypoxia or to HIF-1 overexpression whereas mutation of the hypoxia-responsive element (HRE) present in this region had no effect. Chromatin immunoprecipitation assays demonstrated that HIF-1α binds to the proximal region of the Hes1 promoter in a Notch-independent manner. Using the same experimental approach, the presence of GABPα and GABPβ1 was also observed in the same region of the promoter. Loss- and gain-of-function studies demonstrated that Hes1 gene expression is upregulated by hypoxia in a GABP-dependent manner. Finally, co-immunoprecipitation assays demonstrated that HIF-1α but not HIF-2α is able to interact with either GABPα or GABPβ1. These results suggest a Notch-independent mechanism where HIF-1 and GABP contribute to the upregulation of Hes1 gene expression in response to hypoxia.
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248
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Tan T, Yu RMK, Wu RSS, Kong RYC. Overexpression and Knockdown of Hypoxia-Inducible Factor 1 Disrupt the Expression of Steroidogenic Enzyme Genes and Early Embryonic Development in Zebrafish. GENE REGULATION AND SYSTEMS BIOLOGY 2017. [PMID: 28634424 PMCID: PMC5467919 DOI: 10.1177/1177625017713193] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Hypoxia is an important environmental stressor leading to endocrine disruption and reproductive impairment in fish. Although the hypoxia-inducible factor 1 (HIF-1) is known to regulate the transcription of various genes mediating oxygen homeostasis, its role in modulating steroidogenesis-related gene expression remains poorly understood. In this study, the regulatory effect of HIF-1 on the expression of 9 steroidogenic enzyme genes was investigated in zebrafish embryos using a “gain-of-function and loss-of-function” approach. Eight of the genes, CYP11a, CYP11b2, 3β-HSD, HMGCR, CYP17a1, 17β-HSD2, CYP19a, and CYP19b, were found to be differentially upregulated at 24 and 48 hpf following zHIF-1α-ΔODD overexpression (a mutant zebrafish HIF-1α protein with proline-414 and proline-557 deleted). Knockdown of zHIF-1α also affected the expression pattern of the steroidogenic enzyme genes. Overexpression of zHIF-1α and hypoxia exposure resulted in downregulated StAR expression but upregulated CYP11a and 3β-HSD expression in zebrafish embryos. Conversely, the expression patterns of these 3 genes were reversed in embryos in which zHIF-1α was knocked down under normoxia, suggesting that these 3 genes are regulated by HIF-1. Overall, the findings from this study indicate that HIF-1–mediated mechanisms are likely involved in the regulation of specific steroidogenic genes.
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Affiliation(s)
- Tianfeng Tan
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong SAR.,Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, China.,Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR
| | - Richard Man Kit Yu
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
| | - Rudolf Shiu Sun Wu
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong SAR.,Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, Hong Kong SAR
| | - Richard Yuen Chong Kong
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong SAR.,Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR
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Comparison of the Hydroxylase Inhibitor Dimethyloxalylglycine and the Iron Chelator Deferoxamine in Diabetic and Aged Wound Healing. Plast Reconstr Surg 2017; 139:695e-706e. [PMID: 28234841 DOI: 10.1097/prs.0000000000003072] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND A hallmark of diabetes mellitus is the breakdown of almost every reparative process in the human body, leading to critical impairments of wound healing. Stabilization and activity of the transcription factor hypoxia-inducible factor (HIF)-1α is impaired in diabetes, leading to deficits in new blood vessel formation in response to injury. In this article, the authors compare the effectiveness of two promising small-molecule therapeutics, the hydroxylase inhibitor dimethyloxalylglycine and the iron chelator deferoxamine, for attenuating diabetes-associated deficits in cutaneous wound healing by enhancing HIF-1α activation. METHODS HIF-1α stabilization, phosphorylation, and transactivation were measured in murine fibroblasts cultured under normoxic or hypoxic and low-glucose or high-glucose conditions following treatment with deferoxamine or dimethyloxalylglycine. In addition, diabetic wound healing and neovascularization were evaluated in db/db mice treated with topical solutions of either deferoxamine or dimethyloxalylglycine, and the efficacy of these molecules was also compared in aged mice. RESULTS The authors show that deferoxamine stabilizes HIF-1α expression and improves HIF-1α transactivity in hypoxic and hyperglycemic states in vitro, whereas the effects of dimethyloxalylglycine are significantly blunted under hyperglycemic hypoxic conditions. In vivo, both dimethyloxalylglycine and deferoxamine enhance wound healing and vascularity in aged mice, but only deferoxamine universally augmented wound healing and neovascularization in the setting of both advanced age and diabetes. CONCLUSION This first direct comparison of deferoxamine and dimethyloxalylglycine in the treatment of impaired wound healing suggests significant therapeutic potential for topical deferoxamine treatment in ischemic and diabetic disease.
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Schito L, Rey S, Konopleva M. Integration of hypoxic HIF-α signaling in blood cancers. Oncogene 2017; 36:5331-5340. [DOI: 10.1038/onc.2017.119] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 01/16/2017] [Accepted: 02/26/2017] [Indexed: 12/15/2022]
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