1
|
Nagarajan M, Dayasekaran V, Jayavel K, Jayaraj M, Chellaswamy S, Ranganathan K, Kaliamoorthy S, Chellapandi S, Baskaran R, Elumalai A. Exploring Genetic Link of Residual Ridge Resorption in Completely Edentulous Individuals: A Prospective Case-Control Clinical Study. Cureus 2024; 16:e64039. [PMID: 39114253 PMCID: PMC11303737 DOI: 10.7759/cureus.64039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Accepted: 07/06/2024] [Indexed: 08/10/2024] Open
Abstract
BACKGROUND Residual ridge resorption presents obstacles in prosthodontic treatment, affecting denture stability and the success of dental implants. Genetic elements, specifically the single nucleotide polymorphism (SNP) 1772C>T variant within the hypoxia-inducible factor 1 subunit alpha (HIF-1α) gene, are hypothesized to contribute to residual ridge resorption progression. Nevertheless, its impact remains insufficiently investigated, especially within the context of South Indian populations. We sought to investigate the connection between SNP 1772C>T and residual ridge resorption (RRR) among fully edentulous individuals, considering demographic factors, genotyping methodologies, and statistical evaluations. METHODS In a prospective case-control study, we recruited 100 completely edentulous participants from South India. Participants were categorized based on alveolar ridge height. Saliva samples were non-invasively collected for DNA extraction, and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis was employed to determine genotype distribution using the HphI restriction enzyme. The statistical evaluations comprised the utilization of chi-square and Fisher's exact tests. RESULTS We observed no significant variations in genotype distributions between the case and control cohorts (CT: p=0.24; CC: p=0.65; TT: p=0.30). The heterozygous genotype CT was prevalent in both groups. CONCLUSIONS Although we did not observe significant associations between SNP 1772C>T and RRR, our findings imply a genetic predisposition to residual ridge resorption that warrants further exploration. Variations in genetic susceptibility across ethnicities and the influence of other genetic variants on residual ridge resorption require additional investigation. This study lays the groundwork for personalized prosthodontic care by highlighting the potential of genetic analysis in routine dental practice to improve treatment strategies.
Collapse
Affiliation(s)
- Mahendirakumar Nagarajan
- Department of Prosthodontics and Crown and Bridge, Government Dental College and Hospital, Cuddalore, IND
| | - Vijitha Dayasekaran
- Department of Prosthodontics and Crown and Bridge, Government Dental College and Hospital, Cuddalore, IND
| | - Kavitha Jayavel
- Department of Periodontics and Implantology, Government Dental College and Hospital, Cuddalore, IND
| | - Merlin Jayaraj
- Department of Oral and Maxillofacial Pathology, Chettinad Dental College and Research Institute, Chennai, IND
| | - Sreeja Chellaswamy
- Department of Oral and Maxillofacial Pathology, Chettinad Dental College and Research Institute, Chennai, IND
| | - Krishnaraj Ranganathan
- Department of Prosthodontics and Crown and Bridge, Government Dental College and Hospital, Cuddalore, IND
| | - Sriram Kaliamoorthy
- Department of Dentistry, Vinayaka Mission's Medical College and Hospital, Vinayaka Mission's Research Foundation (DU), Karaikal, IND
| | - Sugirtha Chellapandi
- Department of Periodontics, Chettinad Dental College and Research Institute, Chennai, IND
| | - Radhika Baskaran
- Department of Periodontics, Chettinad Dental College and Research Institute, Chennai, IND
| | - Agila Elumalai
- Department of Periodontics, Chettinad Dental College and Research Institute, Chennai, IND
| |
Collapse
|
2
|
Ubaid S, Kashif M, Laiq Y, Nayak AK, Kumar V, Singh V. Targeting HIF-1α in sickle cell disease and cancer: unraveling therapeutic opportunities and risks. Expert Opin Ther Targets 2024; 28:357-373. [PMID: 38861226 DOI: 10.1080/14728222.2024.2367640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 06/10/2024] [Indexed: 06/12/2024]
Abstract
INTRODUCTION HIF-1α, a key player in medical science, holds immense significance in therapeutic approaches. This review delves into its complex dynamics, emphasizing the delicate balance required for its modulation. HIF-1α stands as a cornerstone in medical research, its role extending to therapeutic strategies. This review explores the intricate interplay surrounding HIF-1α, highlighting its critical involvement and the necessity for cautious modulation. AREAS COVERED In sickle cell disease (SCD), HIF-1α's potential to augment fetal hemoglobin (HbF) production and mitigate symptoms is underscored. Furthermore, its role in cancer is examined, particularly its influence on survival in hypoxic tumor microenvironments, angiogenesis, and metastasis. The discussion extends to the intricate relationship between HIF-1α modulation and cancer risks in SCD patients, emphasizing the importance of balancing therapeutic benefits and potential hazards. EXPERT OPINION Managing HIF-1α modulation in SCD patients requires a nuanced approach, considering therapeutic potential alongside associated risks, especially in exacerbating cancer risks. An evolutionary perspective adds depth, highlighting adaptations in populations adapted to low-oxygen environments and aligning cancer cell metabolism with primitive cells. The role of HIF-1α as a therapeutic target is discussed within the context of complex cancer biology and metabolism, acknowledging varied responses across diverse cancers influenced by intricate evolutionary adaptations.
Collapse
Affiliation(s)
- Saba Ubaid
- Department of Biochemistry, King George's Medical University, Lucknow, India
| | - Mohammad Kashif
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Yusra Laiq
- Department of Biotechnology, Era University, Lucknow, India
| | | | - Vipin Kumar
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Vivek Singh
- Department of Biochemistry, King George's Medical University, Lucknow, India
| |
Collapse
|
3
|
Stepien BK, Wielockx B. From Vessels to Neurons-The Role of Hypoxia Pathway Proteins in Embryonic Neurogenesis. Cells 2024; 13:621. [PMID: 38607059 PMCID: PMC11012138 DOI: 10.3390/cells13070621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/20/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Embryonic neurogenesis can be defined as a period of prenatal development during which divisions of neural stem and progenitor cells give rise to neurons. In the central nervous system of most mammals, including humans, the majority of neocortical neurogenesis occurs before birth. It is a highly spatiotemporally organized process whose perturbations lead to cortical malformations and dysfunctions underlying neurological and psychiatric pathologies, and in which oxygen availability plays a critical role. In case of deprived oxygen conditions, known as hypoxia, the hypoxia-inducible factor (HIF) signaling pathway is activated, resulting in the selective expression of a group of genes that regulate homeostatic adaptations, including cell differentiation and survival, metabolism and angiogenesis. While a physiological degree of hypoxia is essential for proper brain development, imbalanced oxygen levels can adversely affect this process, as observed in common obstetrical pathologies such as prematurity. This review comprehensively explores and discusses the current body of knowledge regarding the role of hypoxia and the HIF pathway in embryonic neurogenesis of the mammalian cortex. Additionally, it highlights existing gaps in our understanding, presents unanswered questions, and provides avenues for future research.
Collapse
Affiliation(s)
- Barbara K. Stepien
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Ben Wielockx
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany
- Experimental Centre, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| |
Collapse
|
4
|
Liu D, Wang L, Ha W, Li K, Shen R, Wang D. HIF-1α: A potential therapeutic opportunity in renal fibrosis. Chem Biol Interact 2024; 387:110808. [PMID: 37980973 DOI: 10.1016/j.cbi.2023.110808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/04/2023] [Accepted: 11/14/2023] [Indexed: 11/21/2023]
Abstract
Renal fibrosis is a common outcome of various renal injuries, leading to structural destruction and functional decline of the kidney, and is also a critical prognostic indicator and determinant in renal diseases therapy. Hypoxia is induced in different stress and injuries in kidney, and the hypoxia inducible factors (HIFs) are activated in the context of hypoxia in response and regulation the hypoxia in time. Under stress and hypoxia conditions, HIF-1α increases rapidly and regulates intracellular energy metabolism, cell proliferation, apoptosis, and inflammation. Through reprogramming cellular metabolism, HIF-1α can directly or indirectly induce abnormal accumulation of metabolites, changes in cellular epigenetic modifications, and activation of fibrotic signals. HIF-1α protein expression and activity are regulated by various posttranslational modifications. The drugs targeting HIF-1α can regulate the downstream cascade signals by inhibiting HIF-1α activity or promoting its degradation. As the renal fibrosis is affected by renal diseases, different diseases may trigger different mechanisms which will affect the therapy effect. Therefore, comprehensive analysis of the role and contribution of HIF-1α in occurrence and progression of renal fibrosis, and determination the appropriate intervention time of HIF-1α in the process of renal fibrosis are important ideas to explore effective treatment strategies. This study reviews the regulation of HIF-1α and its mediated complex cascade reactions in renal fibrosis, and lists some drugs targeting HIF-1α that used in preclinical studies, to provide new insight for the study of the renal fibrosis mechanism.
Collapse
Affiliation(s)
- Disheng Liu
- The First Hospital of Lanzhou University, Lanzhou University, Gansu, 730000, China
| | - Lu Wang
- The First Hospital of Lanzhou University, Lanzhou University, Gansu, 730000, China
| | - Wuhua Ha
- The First Hospital of Lanzhou University, Lanzhou University, Gansu, 730000, China
| | - Kan Li
- The First Hospital of Lanzhou University, Lanzhou University, Gansu, 730000, China
| | - Rong Shen
- School of Basic Medical Sciences, Lanzhou University, Gansu, 730000, China.
| | - Degui Wang
- School of Basic Medical Sciences, Lanzhou University, Gansu, 730000, China.
| |
Collapse
|
5
|
Kimura K, Jackson TLB, Huang RCC. Interaction and Collaboration of SP1, HIF-1, and MYC in Regulating the Expression of Cancer-Related Genes to Further Enhance Anticancer Drug Development. Curr Issues Mol Biol 2023; 45:9262-9283. [PMID: 37998757 PMCID: PMC10670631 DOI: 10.3390/cimb45110580] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/09/2023] [Accepted: 11/11/2023] [Indexed: 11/25/2023] Open
Abstract
Specificity protein 1 (SP1), hypoxia-inducible factor 1 (HIF-1), and MYC are important transcription factors (TFs). SP1, a constitutively expressed housekeeping gene, regulates diverse yet distinct biological activities; MYC is a master regulator of all key cellular activities including cell metabolism and proliferation; and HIF-1, whose protein level is rapidly increased when the local tissue oxygen concentration decreases, functions as a mediator of hypoxic signals. Systems analyses of the regulatory networks in cancer have shown that SP1, HIF-1, and MYC belong to a group of TFs that function as master regulators of cancer. Therefore, the contributions of these TFs are crucial to the development of cancer. SP1, HIF-1, and MYC are often overexpressed in tumors, which indicates the importance of their roles in the development of cancer. Thus, proper manipulation of SP1, HIF-1, and MYC by appropriate agents could have a strong negative impact on cancer development. Under these circumstances, these TFs have naturally become major targets for anticancer drug development. Accordingly, there are currently many SP1 or HIF-1 inhibitors available; however, designing efficient MYC inhibitors has been extremely difficult. Studies have shown that SP1, HIF-1, and MYC modulate the expression of each other and collaborate to regulate the expression of numerous genes. In this review, we provide an overview of the interactions and collaborations of SP1, HIF1A, and MYC in the regulation of various cancer-related genes, and their potential implications in the development of anticancer therapy.
Collapse
Affiliation(s)
| | | | - Ru Chih C. Huang
- Department of Biology, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218-2685, USA
| |
Collapse
|
6
|
Stampone E, Bencivenga D, Capellupo MC, Roberti D, Tartaglione I, Perrotta S, Della Ragione F, Borriello A. Genome editing and cancer therapy: handling the hypoxia-responsive pathway as a promising strategy. Cell Mol Life Sci 2023; 80:220. [PMID: 37477829 PMCID: PMC10361942 DOI: 10.1007/s00018-023-04852-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/14/2023] [Accepted: 06/29/2023] [Indexed: 07/22/2023]
Abstract
The precise characterization of oxygen-sensing pathways and the identification of pO2-regulated gene expression are both issues of critical importance. The O2-sensing system plays crucial roles in almost all the pivotal human processes, including the stem cell specification, the growth and development of tissues (such as embryogenesis), the modulation of intermediate metabolism (including the shift of the glucose metabolism from oxidative to anaerobic ATP production and vice versa), and the control of blood pressure. The solid cancer microenvironment is characterized by low oxygen levels and by the consequent activation of the hypoxia response that, in turn, allows a complex adaptive response characterized mainly by neoangiogenesis and metabolic reprogramming. Recently, incredible advances in molecular genetic methodologies allowed the genome editing with high efficiency and, above all, the precise identification of target cells/tissues. These new possibilities and the knowledge of the mechanisms of adaptation to hypoxia suggest the effective development of new therapeutic approaches based on the manipulation, targeting, and exploitation of the oxygen-sensor system molecular mechanisms.
Collapse
Affiliation(s)
- Emanuela Stampone
- Department of Precision Medicine, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 7, 80138, Naples, Italy
| | - Debora Bencivenga
- Department of Precision Medicine, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 7, 80138, Naples, Italy
| | - Maria Chiara Capellupo
- Department of Precision Medicine, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 7, 80138, Naples, Italy
| | - Domenico Roberti
- Department of the Woman, the Child and of the General and Specialty Surgery, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 2, 80138, Naples, Italy
| | - Immacolata Tartaglione
- Department of the Woman, the Child and of the General and Specialty Surgery, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 2, 80138, Naples, Italy
| | - Silverio Perrotta
- Department of the Woman, the Child and of the General and Specialty Surgery, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 2, 80138, Naples, Italy
| | - Fulvio Della Ragione
- Department of Precision Medicine, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 7, 80138, Naples, Italy.
| | - Adriana Borriello
- Department of Precision Medicine, University of Campania "L. Vanvitelli", Via Luigi De Crecchio, 7, 80138, Naples, Italy.
| |
Collapse
|
7
|
Qu M, Long Y, Wang Y, Yin N, Zhang X, Zhang J. Hypoxia Increases ATX Expression by Histone Crotonylation in a HIF-2α-Dependent Manner. Int J Mol Sci 2023; 24:ijms24087031. [PMID: 37108194 PMCID: PMC10138485 DOI: 10.3390/ijms24087031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/01/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Autotaxin (ATX), the key enzyme that generates lysophosphatidic acid (LPA) from lysophosphatidylcholine (LPC), is involved in tumorigenesis through the ATX-LPA axis and is regarded as a valuable target in tumor therapy. Hypoxia is a major feature of solid tumors and contributes to tumor development with striking alterations in the gene expression profile. Here, we show that hypoxia induces ATX expression in a hypoxia-inducible factor (HIF) 2α-dependent fashion in human colon cancer SW480 cells. HIF-2α is directly bound to specific hypoxia response elements (HREs) in the ATX promoter. Under hypoxic conditions, knockout or inhibition of ATX suppressed the migration of SW480 cells, which could be rescued by the addition of LPA, suggesting that the induction of ATX during hypoxia promotes cancer cell migration through the ATX-LPA axis. Further studies showed that ATX expression was induced by HIF-2α through recruiting p300/CBP, which led to crotonylation but not acetylation of histone H3 in the ATX promoter region during hypoxia. Moreover, elevation of cellular histone crotonylation levels could induce ATX expression under normoxic conditions. In conclusion, our findings reveal that ATX is induced in SW480 cells during hypoxia by histone crotonylation in a HIF-2α-dependent manner, while as a novel mechanism of ATX expression regulation, the upregulation of ATX expression by histone crotonylation is not confined to hypoxia.
Collapse
Affiliation(s)
- Mengxia Qu
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Yang Long
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Yuqin Wang
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
- Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, The University of Texas-Health Science Center at Houston, Houston, TX 77030, USA
| | - Nan Yin
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Xiaotian Zhang
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Junjie Zhang
- The Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Department of Biology, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| |
Collapse
|
8
|
Hypoxia-inducible factor signaling in vascular calcification in chronic kidney disease patients. J Nephrol 2022; 35:2205-2213. [PMID: 36208406 DOI: 10.1007/s40620-022-01432-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 08/02/2022] [Indexed: 10/10/2022]
Abstract
Chronic kidney disease (CKD) affects approximately 15% of the adult population in high-income countries and is associated with significant comorbidities, including increased vascular calcifications which is associated with a higher risk for cardiovascular events. Even though the underlying pathophysiology is unclear, hypoxia-inducible factor (HIF) signaling appears to play a central role in inflammation, angiogenesis, fibrosis, cellular proliferation, apoptosis and vascular calcifications which is influenced by multiple variables such as iron deficiency anemia, serum phosphorus and calcium levels, fibroblast growth factor-23 (FGF-23) and Klotho. Along with the growing understanding of the pathology, potential therapeutic alternatives have emerged including HIF stabilizers and SGLT-2 inhibitors. The aim of this review is to discuss the role of HIF signaling in the pathophysiology of vascular calcification in CKD patients and to identify potential therapeutic approaches.
Collapse
|
9
|
Luo S, Jiang Y, Anfu Zheng, Zhao Y, Wu X, Li M, Du F, Chen Y, Deng S, Chen M, Li W, Li X, Gu L, Sun Y, Xiao Z, Shen J. Targeting hypoxia-inducible factors for breast cancer therapy: A narrative review. Front Pharmacol 2022; 13:1064661. [PMID: 36532768 PMCID: PMC9751339 DOI: 10.3389/fphar.2022.1064661] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/18/2022] [Indexed: 09/15/2023] Open
Abstract
Hypoxia-inducible factors (HIFs), central regulators for cells to adapt to low cellular oxygen levels, are often overexpressed and activated in breast cancer. HIFs modulate the primary transcriptional response of downstream pathways and target genes in response to hypoxia, including glycolysis, angiogenesis and metastasis. They can promote the development of breast cancer and are associated with poor prognosis of breast cancer patients by regulating cancer processes closely related to tumor invasion, metastasis and drug resistance. Thus, specific targeting of HIFs may improve the efficiency of cancer therapy. In this review, we summarize the advances in HIF-related molecular mechanisms and clinical and preclinical studies of drugs targeting HIFs in breast cancer. Given the rapid progression in this field and nanotechnology, drug delivery systems (DDSs) for HIF targeting are increasingly being developed. Therefore, we highlight the HIF related DDS, including liposomes, polymers, metal-based or carbon-based nanoparticles.
Collapse
Affiliation(s)
- Shuang Luo
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
- Department of Pharmacy, The Second People’s Hospital of Jiangyou, Mianyang, China
| | - Yu Jiang
- Department of Pharmacy, The People’s Hospital of Wusheng, Guang’an, China
| | - Anfu Zheng
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yueshui Zhao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Xu Wu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Fukuan Du
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yu Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Shuai Deng
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Meijuan Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Wanping Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Xiaobing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Li Gu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yuhong Sun
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Zhangang Xiao
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jing Shen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| |
Collapse
|
10
|
Lim JS, Shi Y, Park SH, Jeon SM, Zhang C, Park YY, Liu R, Li J, Cho WS, Du L, Lee JH. Mutual regulation between phosphofructokinase 1 platelet isoform and VEGF promotes glioblastoma tumor growth. Cell Death Dis 2022; 13:1002. [PMID: 36435833 PMCID: PMC9701207 DOI: 10.1038/s41419-022-05449-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 11/28/2022]
Abstract
Glioblastoma (GBM) is a highly vascular malignant brain tumor that overexpresses vascular endothelial growth factor (VEGF) and phosphofructokinase 1 platelet isoform (PFKP), which catalyzes a rate-limiting reaction in glycolysis. However, whether PFKP and VEGF are reciprocally regulated during GBM tumor growth remains unknown. Here, we show that PFKP can promote EGFR activation-induced VEGF expression in HIF-1α-dependent and -independent manners in GBM cells. Importantly, we demonstrate that EGFR-phosphorylated PFKP Y64 has critical roles in both AKT/SP1-mediated transcriptional expression of HIF-1α and in the AKT-mediated β-catenin S552 phosphorylation, to fully enhance VEGF transcription, subsequently promoting blood vessel formation and brain tumor growth. Levels of PFKP Y64 phosphorylation in human GBM specimens are positively correlated with HIF-1α expression, β-catenin S552 phosphorylation, and VEGF expression. Conversely, VEGF upregulates PFKP expression in a PFKP S386 phosphorylation-dependent manner, leading to increased PFK enzyme activity, aerobic glycolysis, and proliferation in GBM cells. These findings highlight a novel mechanism underlying the mutual regulation that occurs between PFKP and VEGF for promoting GBM tumor growth and also suggest that targeting the PFKP/VEGF regulatory loop might show therapeutic potential for treating GBM patients.
Collapse
Affiliation(s)
- Je Sun Lim
- grid.255166.30000 0001 2218 7142Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315 Republic of Korea
| | - YuJie Shi
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041 P.R. China
| | - Su Hwan Park
- grid.255166.30000 0001 2218 7142Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315 Republic of Korea
| | - So Mi Jeon
- grid.255166.30000 0001 2218 7142Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315 Republic of Korea
| | - Chuanbao Zhang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070 P.R. China
| | - Yun-Yong Park
- grid.254224.70000 0001 0789 9563Department of life Science, Chung-Ang University, Seoul, 06974 Republic of Korea
| | - Rui Liu
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041 P.R. China
| | - Jing Li
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041 P.R. China
| | - Wan-Seob Cho
- grid.255166.30000 0001 2218 7142Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315 Republic of Korea
| | - Linyong Du
- grid.268099.c0000 0001 0348 3990Key Laboratory of Laboratory of Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang 325000 P.R. China
| | - Jong-Ho Lee
- grid.255166.30000 0001 2218 7142Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315 Republic of Korea ,grid.255166.30000 0001 2218 7142Department of Biomedical Sciences, Dong-A University, Busan, 49315 Republic of Korea
| |
Collapse
|
11
|
Devaux CA, Raoult D. The impact of COVID-19 on populations living at high altitude: Role of hypoxia-inducible factors (HIFs) signaling pathway in SARS-CoV-2 infection and replication. Front Physiol 2022; 13:960308. [PMID: 36091390 PMCID: PMC9454615 DOI: 10.3389/fphys.2022.960308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
Cases of coronavirus disease 2019 (COVID-19) have been reported worldwide. However, one epidemiological report has claimed a lower incidence of the disease in people living at high altitude (>2,500 m), proposing the hypothesis that adaptation to hypoxia may prove to be advantageous with respect to SARS-CoV-2 infection. This publication was initially greeted with skepticism, because social, genetic, or environmental parametric variables could underlie a difference in susceptibility to the virus for people living in chronic hypobaric hypoxia atmospheres. Moreover, in some patients positive for SARS-CoV-2, early post-infection ‘happy hypoxia” requires immediate ventilation, since it is associated with poor clinical outcome. If, however, we accept to consider the hypothesis according to which the adaptation to hypoxia may prove to be advantageous with respect to SARS-CoV-2 infection, identification of the molecular rational behind it is needed. Among several possibilities, HIF-1 regulation appears to be a molecular hub from which different signaling pathways linking hypoxia and COVID-19 are controlled. Interestingly, HIF-1α was reported to inhibit the infection of lung cells by SARS-CoV-2 by reducing ACE2 viral receptor expression. Moreover, an association of the rs11549465 variant of HIF-1α with COVID-19 susceptibility was recently discovered. Here, we review the evidence for a link between HIF-1α, ACE2 and AT1R expression, and the incidence/severity of COVID-19. We highlight the central role played by the HIF-1α signaling pathway in the pathophysiology of COVID-19.
Collapse
Affiliation(s)
- Christian Albert Devaux
- Aix-Marseille University, IRD, APHM, MEPHI, Marseille, France
- IHU-Méditerranée Infection, Marseille, France
- Centre National de la Recherche Scientifique, Marseille, France
- *Correspondence: Christian Albert Devaux,
| | - Didier Raoult
- Aix-Marseille University, IRD, APHM, MEPHI, Marseille, France
- IHU-Méditerranée Infection, Marseille, France
| |
Collapse
|
12
|
Mylonas KS, Karangelis D, Androutsopoulou V, Chalikias G, Tziakas D, Mikroulis D, Iliopoulos DC, Nikiteas N, Schizas D. Stem cell genes in atheromatosis: The role of
Klotho
,
HIF1α
,
OCT4
, and
BMP4. IUBMB Life 2022; 74:1003-1011. [DOI: 10.1002/iub.2667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/26/2022] [Indexed: 01/10/2023]
Affiliation(s)
- Konstantinos S. Mylonas
- Department of Cardiac Surgery Onassis Cardiac Surgery Center Athens Greece
- Laboratory of Experimental Surgery and Surgical Research “N.S. Christeas”, School of Medicine National and Kapodistrian University of Athens Athens Greece
| | - Dimos Karangelis
- Department of Cardiac Surgery, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
| | - Vasiliki Androutsopoulou
- Department of Cardiac Surgery, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
| | - George Chalikias
- Cardiology Department, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
| | - Dimitrios Tziakas
- Cardiology Department, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
| | - Dimitrios Mikroulis
- Department of Cardiac Surgery, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
| | - Dimitrios C. Iliopoulos
- Laboratory of Experimental Surgery and Surgical Research “N.S. Christeas”, School of Medicine National and Kapodistrian University of Athens Athens Greece
- Fourth Department of Cardiac Surgery HYGEIA Hospital Athens Greece
| | - Nikolaos Nikiteas
- Second Propaedeutic Department of Surgery, Laiko General Hospital, School of Medicine National and Kapodistrian University of Athens Athens Greece
| | - Dimitrios Schizas
- First Department of Surgery, Laiko General Hospital, School of Medicine National and Kapodistrian University of Athens Athens Greece
| |
Collapse
|
13
|
Sirtuins and Hypoxia in EMT Control. Pharmaceuticals (Basel) 2022; 15:ph15060737. [PMID: 35745656 PMCID: PMC9228842 DOI: 10.3390/ph15060737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 05/25/2022] [Accepted: 06/08/2022] [Indexed: 02/06/2023] Open
Abstract
Epithelial–mesenchymal transition (EMT), a physiological process during embryogenesis, can become pathological in the presence of different driving forces. Reduced oxygen tension or hypoxia is one of these forces, triggering a large number of molecular pathways with aberrant EMT induction, resulting in cancer and fibrosis onset. Both hypoxia-induced factors, HIF-1α and HIF-2α, act as master transcription factors implicated in EMT. On the other hand, hypoxia-dependent HIF-independent EMT has also been described. Recently, a new class of seven proteins with deacylase activity, called sirtuins, have been implicated in the control of both hypoxia responses, HIF-1α and HIF-2α activation, as well as EMT induction. Intriguingly, different sirtuins have different effects on hypoxia and EMT, acting as either activators or inhibitors, depending on the tissue and cell type. Interestingly, sirtuins and HIF can be activated or inhibited with natural or synthetic molecules. Moreover, recent studies have shown that these natural or synthetic molecules can be better conveyed using nanoparticles, representing a valid strategy for EMT modulation. The following review, by detailing the aspects listed above, summarizes the interplay between hypoxia, sirtuins, and EMT, as well as the possible strategies to modulate them by using a nanoparticle-based approach.
Collapse
|
14
|
Kato A, Ng S, Thangasamy A, Han H, Zhou W, Raeppel S, Fallon M, Guha S, Ammanamanchi S. A potential signaling axis between RON kinase receptor and hypoxia-inducible factor-1 alpha in pancreatic cancer. Mol Carcinog 2021; 60:734-745. [PMID: 34347914 PMCID: PMC9292374 DOI: 10.1002/mc.23339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 11/06/2022]
Abstract
The Cancer Genome Atlas (TCGA) of a pancreatic cancer cohort identified high MST1R (RON tyrosine kinase receptor) expression correlated with poor prognosis in human pancreatic cancer. RON expression is null/minimal in normal pancreas but elevates from pan-in lesions through invasive carcinomas. We report using multiple approaches RON directly regulates HIF-1α, a critical driver of genes involved in cancer cell invasion and metastasis. RON and HIF-1α are highly co-expressed in the 101 human PDAC tumors analyzed and RON expression correlated with HIF-1α expression in a subset of PDAC cell lines. knockdown of RON expression in RON positive cells blocked HIF-1α expression, whereas ectopic RON expression in RON null cells induced HIF-1α expression suggesting the direct regulation of HIF-1α by RON kinase receptor. RON regulates HIF-1α through an unreported transcriptional mechanism involving PI3 kinase-mediated AKT phosphorylation and Sp1-dependent HIF-1α promoter activity leading to increased HIF-1α mRNA expression. RON/HIF-1α modulation altered the invasive behavior of PDAC cells. A small-molecule RON kinase inhibitor decreased RON ligand, MSP-induced HIF-1α expression, and invasion of PDAC cells. Immunohistochemical analysis on RON knockdown orthotopic PDAC tumor xenograft confirmed that RON inhibition significantly blocked HIF-1α expression. RON/HIF-1α co-expression also exists in triple-negative breast cancer cells, a tumor type that also lacks molecular therapeutic targets. This is the first report describing RON/HIF-1α axis in any tumor type and is a potential novel therapeutic target.
Collapse
Affiliation(s)
- Akihisa Kato
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA.,Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Serina Ng
- Division of Molecular Medicine, TGen, Phoenix, Arizona, USA
| | - Amalraj Thangasamy
- Department of Medicine, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Haiyong Han
- Division of Molecular Medicine, TGen, Phoenix, Arizona, USA
| | - Wendi Zhou
- Department of Pathology, Banner University Medical Center, Phoenix, Arizona, USA
| | | | - Michael Fallon
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
| | - Sushovan Guha
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
| | - Sudhakar Ammanamanchi
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
| |
Collapse
|
15
|
Manuelli V, Pecorari C, Filomeni G, Zito E. Regulation of redox signaling in HIF-1-dependent tumor angiogenesis. FEBS J 2021; 289:5413-5425. [PMID: 34228878 DOI: 10.1111/febs.16110] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/24/2021] [Accepted: 07/05/2021] [Indexed: 12/11/2022]
Abstract
Angiogenesis is the process of blood vessel growth. The angiogenic switch consists of new blood vessel formation that, in carcinogenesis, can lead to the transition from a harmless cluster of dormant cells to a large tumorigenic mass with metastatic potential. Hypoxia, that is, the scarcity of oxygen, is a hallmark of solid tumors to which they adapt by activating hypoxia-inducible factor-1 (HIF-1), a transcription factor triggering de novo angiogenesis. HIF-1 and the angiogenic molecules that are expressed upon its activation are modulated by redox status. Modulations of the redox environment can influence the angiogenesis signaling at different levels, thereby impinging on the angiogenic switch. This review provides a molecular overview of the redox-sensitive steps in angiogenic signaling, the main molecular players involved, and their crosstalk with the unfolded protein response. New classes of inhibitors of these modulators which might act as antiangiogenic drugs in cancer are also discussed.
Collapse
Affiliation(s)
- Valeria Manuelli
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Chiara Pecorari
- Redox Biology Group, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Giuseppe Filomeni
- Redox Biology Group, Danish Cancer Society Research Center, Copenhagen, Denmark.,Center for Healthy Aging, Copenhagen University, Denmark.,Department of Biology, Tor Vergata University, Rome, Italy
| | - Ester Zito
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy.,Department of Biomolecular Sciences, University of Urbino Carlo Bo, Italy
| |
Collapse
|
16
|
Li C, Liu Z, Zhou J, Meng X, Liu S, Li W, Zhang X, Zhou J, Yao W, Dong C, Cao Y, Li R, Chen B, Jiang A, Jiang Y, Ning C, Zhao F, Wei Y, Sun SC, Tao J, Wu W, Shen M, Liu H. Insulin-like growth factor-I prevents hypoxia-inducible factor-1 alpha-dependent G1/S arrest by activating cyclin E/cyclin-dependent kinase2 via the phoshatidylinositol-3 kinase/AKT/forkhead box O1/Cdkn1b pathway in porcine granulosa cells†. Biol Reprod 2021; 102:116-132. [PMID: 31435642 DOI: 10.1093/biolre/ioz162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/23/2019] [Accepted: 08/12/2019] [Indexed: 11/13/2022] Open
Abstract
As the follicle develops, the thickening of the granulosa compartment leads to progressively deficient supply of oxygen in granulosa cells (GCs) due to the growing distances from the follicular vessels. These conditions are believed to cause hypoxia in GCs during folliculogenesis. Upon hypoxic conditions, several types of mammalian cells have been reported to undergo cell cycle arrest. However, it remains unclear whether hypoxia exerts any impact on cell cycle progression of GCs. On the other hand, although the GCs may live in a hypoxic environment, their mitotic capability appears to be unaffected in growing follicles. It thus raises the question whether there are certain intraovarian factors that might overcome the inhibitory effects of hypoxia. The present study provides the first evidence suggesting that cobalt chloride (CoCl2)-mimicked hypoxia prevented G1-to-S cell cycle progression in porcine GCs. In addition, we demonstrated that the inhibitory effects of CoCl2 on GCs cell cycle are mediated through hypoxia-inducible factor-1 alpha/FOXO1/Cdkn1b pathway. Moreover, we identified insulin-like growth factor-I (IGF-I) as an intrafollicular factor required for cell cycle recovery by binding to IGF-I receptor in GCs suffering CoCl2 stimulation. Further investigations confirmed a role of IGF-I in preserving G1/S progression of CoCl2-treated GCs via activating the cyclin E/cyclin-dependent kinase2 complex through the phoshatidylinositol-3 kinase/protein kinase B (AKT)/FOXO1/Cdkn1b axis. Although the present findings were based on a hypoxia mimicking model by using CoCl2, our study might shed new light on the regulatory mechanism of GCs cell cycle upon hypoxic stimulation.
Collapse
Affiliation(s)
- Chengyu Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhaojun Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiaqi Zhou
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xueqin Meng
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shuo Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Weijian Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xue Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jilong Zhou
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Wang Yao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Chao Dong
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yan Cao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Rongyang Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Baobao Chen
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Aiwen Jiang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yi Jiang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Caibo Ning
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Fang Zhao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yinghui Wei
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jingli Tao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Wangjun Wu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Ming Shen
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Honglin Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| |
Collapse
|
17
|
Cancer Cell Metabolism in Hypoxia: Role of HIF-1 as Key Regulator and Therapeutic Target. Int J Mol Sci 2021; 22:ijms22115703. [PMID: 34071836 PMCID: PMC8199012 DOI: 10.3390/ijms22115703] [Citation(s) in RCA: 156] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 12/13/2022] Open
Abstract
In order to meet the high energy demand, a metabolic reprogramming occurs in cancer cells. Its role is crucial in promoting tumor survival. Among the substrates in demand, oxygen is fundamental for bioenergetics. Nevertheless, tumor microenvironment is frequently characterized by low-oxygen conditions. Hypoxia-inducible factor 1 (HIF-1) is a pivotal modulator of the metabolic reprogramming which takes place in hypoxic cancer cells. In the hub of cellular bioenergetics, mitochondria are key players in regulating cellular energy. Therefore, a close crosstalk between mitochondria and HIF-1 underlies the metabolic and functional changes of cancer cells. Noteworthy, HIF-1 represents a promising target for novel cancer therapeutics. In this review, we summarize the molecular mechanisms underlying the interplay between HIF-1 and energetic metabolism, with a focus on mitochondria, of hypoxic cancer cells.
Collapse
|
18
|
Potteti HR, Noone PM, Tamatam CR, Ankireddy A, Noel S, Rabb H, Reddy SP. Nrf2 mediates hypoxia-inducible HIF1α activation in kidney tubular epithelial cells. Am J Physiol Renal Physiol 2021; 320:F464-F474. [PMID: 33491566 PMCID: PMC7988808 DOI: 10.1152/ajprenal.00501.2020] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/22/2020] [Accepted: 01/20/2021] [Indexed: 11/22/2022] Open
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) and hypoxia-inducible factor-1α (HIF1α) transcription factors protect against ischemic acute kidney injury (AKI) by upregulating metabolic and cytoprotective gene expression. In this study, we tested the hypothesis that Nrf2 is required for HIF1α-mediated hypoxic responses using Nrf2-sufficient (wild-type) and Nrf2-deficient (Nrf2-/-) primary murine renal/kidney tubular epithelial cells (RTECs) and human immortalized tubular epithelial cells (HK2 cells) with HIF1 inhibition and activation. The HIF1 pathway inhibitor digoxin blocked hypoxia-stimulated HIF1α activation and heme oxygenase (HMOX1) expression in HK2 cells. Hypoxia-mimicking cobalt (II) chloride-stimulated HMOX1 expression was significantly lower in Nrf2-/- RTECs than in wild-type counterparts. Similarly, hypoxia-stimulated HIF1α-dependent metabolic gene expression was markedly impaired in Nrf2-/- RTECs. Nrf2 deficiency impaired hypoxia-induced HIF1α stabilization independent of increased prolyl 4-hydroxylase gene expression. We found decreased HIF1α mRNA levels in Nrf2-/- RTECs under both normoxia and hypoxia-reoxygenation conditions. In silico analysis and chromatin immunoprecipitation assays demonstrated Nrf2 binding to the HIF1α promoter in normoxia, but its binding decreased in hypoxia-exposed HK2 cells. However, Nrf2 binding at the HIF1α promoter was enriched following reoxygenation, demonstrating that Nrf2 maintains constitutive HIF1α expression. Consistent with this result, we found decreased levels of Nrf2 in hypoxia and that were restored following reoxygenation. Inhibition of mitochondrial complex I prevented hypoxia-induced Nrf2 downregulation and also increased basal Nrf2 levels. These results demonstrate a crucial role for Nrf2 in optimal HIF1α activation in hypoxia and that mitochondrial signaling downregulates Nrf2 levels in hypoxia, whereas reoxygenation restores it. Nrf2 and HIF1α interact to provide optimal metabolic and cytoprotective responses in ischemic AKI.
Collapse
Affiliation(s)
- Haranatha R Potteti
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Patrick M Noone
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Chandramohan R Tamatam
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Aparna Ankireddy
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Sanjeev Noel
- Division of Nephrology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Hamid Rabb
- Division of Nephrology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Sekhar P Reddy
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| |
Collapse
|
19
|
Yan F, Jia P, Yoshioka H, Suzuki A, Iwata J, Zhao Z. A developmental stage-specific network approach for studying dynamic co-regulation of transcription factors and microRNAs during craniofacial development. Development 2020; 147:226075. [PMID: 33234712 DOI: 10.1242/dev.192948] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 11/10/2020] [Indexed: 12/21/2022]
Abstract
Craniofacial development is regulated through dynamic and complex mechanisms that involve various signaling cascades and gene regulations. Disruption of such regulations can result in craniofacial birth defects. Here, we propose the first developmental stage-specific network approach by integrating two crucial regulators, transcription factors (TFs) and microRNAs (miRNAs), to study their co-regulation during craniofacial development. Specifically, we used TFs, miRNAs and non-TF genes to form feed-forward loops (FFLs) using genomic data covering mouse embryonic days E10.5 to E14.5. We identified key novel regulators (TFs Foxm1, Hif1a, Zbtb16, Myog, Myod1 and Tcf7, and miRNAs miR-340-5p and miR-129-5p) and target genes (Col1a1, Sgms2 and Slc8a3) expression of which changed in a developmental stage-dependent manner. We found that the Wnt-FoxO-Hippo pathway (from E10.5 to E11.5), tissue remodeling (from E12.5 to E13.5) and miR-129-5p-mediated Col1a1 regulation (from E10.5 to E14.5) might play crucial roles in craniofacial development. Enrichment analyses further suggested their functions. Our experiments validated the regulatory roles of miR-340-5p and Foxm1 in the Wnt-FoxO-Hippo subnetwork, as well as the role of miR-129-5p in the miR-129-5p-Col1a1 subnetwork. Thus, our study helps understand the comprehensive regulatory mechanisms for craniofacial development.
Collapse
Affiliation(s)
- Fangfang Yan
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Peilin Jia
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Hiroki Yoshioka
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA.,Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Akiko Suzuki
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA.,Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Junichi Iwata
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA.,Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| | - Zhongming Zhao
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA.,Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| |
Collapse
|
20
|
Dzhalilova D, Makarova O. Differences in Tolerance to Hypoxia: Physiological, Biochemical, and Molecular-Biological Characteristics. Biomedicines 2020; 8:E428. [PMID: 33080959 PMCID: PMC7603118 DOI: 10.3390/biomedicines8100428] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 02/07/2023] Open
Abstract
Hypoxia plays an important role in the development of many infectious, inflammatory, and tumor diseases. The predisposition to such disorders is mostly provided by differences in basic tolerance to oxygen deficiency, which we discuss in this review. Except the direct exposure of different-severity hypoxia in decompression chambers or in highland conditions, there are no alternative methods for determining organism tolerance. Due to the variability of the detection methods, differences in many parameters between tolerant and susceptible organisms are still not well-characterized, but some of them can serve as biomarkers of susceptibility to hypoxia. At the moment, several potential biomarkers in conditions after hypoxic exposure have been identified both in experimental animals and humans. The main potential biomarkers are Hypoxia-Inducible Factor (HIF)-1, Heat-Shock Protein 70 (HSP70), and NO. Due to the different mechanisms of various high-altitude diseases, biomarkers may not be highly specific and universal. Therefore, it is extremely important to conduct research on hypoxia susceptibility biomarkers. Moreover, it is important to develop a method for the evaluation of organisms' basic hypoxia tolerance without the necessity of any oxygen deficiency exposure. This can contribute to new personalized medicine approaches' development for diagnostics and the treatment of inflammatory and tumor diseases, taking into account hypoxia tolerance differences.
Collapse
Affiliation(s)
- Dzhuliia Dzhalilova
- Department of Immunomorphology of Inflammation, Federal State Budgetary Institution ‘Research Institute of Human Morphology’, Moscow 117418, Russia;
| | | |
Collapse
|
21
|
Tiana M, Acosta-Iborra B, Hernández R, Galiana C, Fernández-Moreno MÁ, Jimenez B, Del Peso L. Metabolic labeling of RNA uncovers the contribution of transcription and decay rates on hypoxia-induced changes in RNA levels. RNA (NEW YORK, N.Y.) 2020; 26:1006-1022. [PMID: 32295863 PMCID: PMC7373995 DOI: 10.1261/rna.072611.119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 04/12/2020] [Indexed: 05/08/2023]
Abstract
Cells adapt to environmental changes, including fluctuations in oxygen levels, through the induction of specific gene expression programs. However, most transcriptomic studies do not distinguish the relative contribution of transcription, RNA processing, and RNA degradation processes to cellular homeostasis. Here we used metabolic labeling followed by massive parallel sequencing of newly transcribed and preexisting RNA fractions to simultaneously analyze RNA synthesis and decay in primary endothelial cells exposed to low oxygen tension. We found that changes in transcription rates induced by hypoxia are the major determinant of changes in RNA levels. However, degradation rates also had a significant contribution, accounting for 24% of the observed variability in total mRNA. In addition, our results indicated that hypoxia led to a reduction of the overall mRNA stability from a median half-life in normoxia of 8.7 h, to 5.7 h in hypoxia. Analysis of RNA content per cell confirmed a decrease of both mRNA and total RNA in hypoxic samples and that this effect is dependent on the EGLN/HIF/TSC2 axis. This effect could potentially contribute to fundamental global responses such as inhibition of translation in hypoxia. In summary, our study provides a quantitative analysis of the contribution of RNA synthesis and stability to the transcriptional response to hypoxia and uncovers an unexpected effect on the latter.
Collapse
Affiliation(s)
- Maria Tiana
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz, 28029 Madrid, Spain
- CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Bárbara Acosta-Iborra
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
| | - Rosana Hernández
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
| | - Clara Galiana
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
| | - Miguel Ángel Fernández-Moreno
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid 28041, Spain
| | - Benilde Jimenez
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz, 28029 Madrid, Spain
- CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Luis Del Peso
- Departamento de Bioquímica, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), 28029 Madrid, Spain
- IdiPaz, Instituto de Investigación Sanitaria del Hospital Universitario La Paz, 28029 Madrid, Spain
- CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Unidad Asociada de Biomedicina CSIC-UCLM, 02006, Albacete, Spain
| |
Collapse
|
22
|
Swiatek M, Jancewicz I, Kluebsoongnoen J, Zub R, Maassen A, Kubala S, Udomkit A, Siedlecki JA, Sarnowski TJ, Sarnowska E. Various forms of HIF-1α protein characterize the clear cell renal cell carcinoma cell lines. IUBMB Life 2020; 72:1220-1232. [PMID: 32250548 DOI: 10.1002/iub.2281] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/14/2020] [Accepted: 03/21/2020] [Indexed: 12/24/2022]
Abstract
Renal cell carcinoma (RCC) represents around 2-3% of all malignancies diagnosed in adult patients. Most frequent (around 70-80% cases) and the most aggressive subtype is clear cell RCC (ccRCC). Mutations in VHL (von Hippel Lindau) gene, characteristic for this cancer type, lead to altered activity of the trimeric VBC (pVHL-elongin B-C) complex and consequently to HIF-1α stabilization. In this study, we present results of exhaustive investigation of HIF-1α alternative transcript variants abundance in A498, CAKI-1, and 786-O ccRCC cell lines. We proved the existence of truncated HIF-1α protein form (HIF1A∆-6) in A498 and HIF1A gene rearrangements in 786-O cell lines. Subsequently, we found that HIF1A∆2-6 was more stable than the full-length HIF-1α. Moreover, the shorter HIF-1α was insensitive for hypoxia and was overaccumulated after proteasome inhibitor treatment indicative of potential diversified roles of full-length and truncated HIF-1α forms in the cell. We also showed that A498, CAKI-1, and 786-O exhibit differential expression of various regulatory genes involved in the control of metabolic processes, that is, glucose and lipid metabolism, and encoding subunits of such machineries like SWI/SNF chromatin remodeling complex. Furthermore, these cell lines exhibited differential responses to axitinib, everolimus, and sunitinib-anticancer drugs-in normoxia and hypoxia as well as various alterations in metabolism-related regulatory processes. Finally, we have shown that overexpression of truncated HIF1A∆2-6 form may affect the protein level of endogenous full-length HIF-1α protein. Thus, our study proves an important role of HIF-1α in the ccRCC development.
Collapse
Affiliation(s)
- Monika Swiatek
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Iga Jancewicz
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | | | - Renata Zub
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Anna Maassen
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Szymon Kubala
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Apinunt Udomkit
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Janusz A Siedlecki
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Tomasz J Sarnowski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Elzbieta Sarnowska
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| |
Collapse
|
23
|
Li C, Zhou J, Liu Z, Zhou J, Yao W, Tao J, Shen M, Liu H. FSH prevents porcine granulosa cells from hypoxia-induced apoptosis via activating mitophagy through the HIF-1α-PINK1-Parkin pathway. FASEB J 2020; 34:3631-3645. [PMID: 31960530 DOI: 10.1096/fj.201901808rrr] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 11/27/2019] [Accepted: 12/03/2019] [Indexed: 01/04/2023]
Abstract
In developing follicles, the granulosa cells (GCs) live in a hypoxic environment due to the devoid of blood supply. Upon hypoxic conditions, several types of mammalian cells have been reported to undergo apoptosis. Follicle-stimulating hormone (FSH) is known as the primary survival factor for antral follicles by preventing GCs apoptosis. Mitophagy is a type of organelle-specific autophagy that removes damaged or stressed mitochondria to maintain cellular health. This study provides the first evidence suggesting that FSH-mediated mitophagy protected porcine GCs from hypoxia-induced apoptosis. Our data showed that the GCs apoptosis caused by mitochondrial pathway upon hypoxia stress was markedly attenuated after FSH treatment, which was correlated with enhanced activation of mitophagy. Interestingly, FSH also stimulated mitochondrial biogenesis as suggested by increased expression of mitochondrial transcription factor A and nuclear respiratory factor 1 during hypoxia exposure. Notably, the protein level of hypoxia inducible factor-1α (HIF-1α) was significantly increased in hypoxic GCs following FSH treatment, accompanied by elevated mitophagic activity and dampened apoptotic signaling. Blocking HIF-1α inhibited mitophagy and restored hypoxia-induced apoptosis despite FSH treatment. Importantly, FSH promoted the expression of serine/threonine kinase PTEN induced putative kinase 1 (PINK1) and the E3 ligase Parkin during hypoxia stress through a HIF-1α dependent manner. This induced the mitophagic clearance of damaged mitochondria, hence inhibiting apoptosis by reducing cytochrome c releasing. The inhibition of HIF-1α and/or PINK1 using inhibitor or RNAi further confirmed the role of the FSH-HIF-1α-PINK1-Parkin-mitophagy axis in suppressing GC apoptosis under hypoxic conditions. These findings highlight a novel function of FSH in preserving GCs viability against hypoxic damage by activating HIF-1α-PINK1-Parkin-mediated mitophagy.
Collapse
Affiliation(s)
- Chengyu Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jiaqi Zhou
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Zhaojun Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jilong Zhou
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Wang Yao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jingli Tao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Ming Shen
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Honglin Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
24
|
Lee HJ, Han HJ. Role of Microtubule-Associated Factors in HIF1α Nuclear Translocation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1232:271-276. [PMID: 31893420 DOI: 10.1007/978-3-030-34461-0_34] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Adaptation to hypoxia is essential for regulating the survival and functions of hypoxic cells; it is mainly mediated by the hypoxia-inducible factor 1 (HIF1). The alpha subunit of HIF1 (HIF1α) is a well-known regulatory component of HIF1, which is tightly controlled by various types of HIF1α-regulating processes. Previous research has shown that microtubule-regulated HIF1α nuclear translocation is a key factor for HIF1 activation under hypoxia. In this review, we summarize experimental reports on the role of microtubule-associated factors, such as microtubule, dynein, and dynein adaptor protein, in nuclear translocation of HIF1α. Based upon scientific evidence, we propose a bicaudal D homolog (BICD) as a novel HIF1α translocation regulating factor. A deeper understanding of the mechanism of the action of regulatory factors in controlling HIF1α nuclear translocation will provide novel insights into cell biology under hypoxia.
Collapse
Affiliation(s)
- Hyun Jik Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research, Seoul National University, Seoul, South Korea
| | - Ho Jae Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research, Seoul National University, Seoul, South Korea
| |
Collapse
|
25
|
Abstract
Eukaryotic cells require sufficient oxygen (O2) for biological activity and survival. When the oxygen demand exceeds its supply, the oxygen levels in local tissues or the whole body decrease (termed hypoxia), leading to a metabolic crisis, threatening physiological functions and viability. Therefore, eukaryotes have developed an efficient and rapid oxygen sensing system: hypoxia-inducible factors (HIFs). The hypoxic responses are controlled by HIFs, which induce the expression of several adaptive genes to increase the oxygen supply and support anaerobic ATP generation in eukaryotic cells. Hypoxia also contributes to a functional decline during the aging process. In this review, we focus on the molecular mechanisms regulating HIF-1α and aging-associated signaling proteins, such as sirtuins, AMP-activated protein kinase, mechanistic target of rapamycin complex 1, UNC-51-like kinase 1, and nuclear factor κB, and their roles in aging and aging-related diseases. In addition, the effects of prenatal hypoxia and obstructive sleep apnea (OSA)-induced intermittent hypoxia have been reviewed due to their involvement in the progression and severity of many diseases, including cancer and other aging-related diseases. The pathophysiological consequences and clinical manifestations of prenatal hypoxia and OSA-induced chronic intermittent hypoxia are discussed in detail.
Collapse
|
26
|
Albadari N, Deng S, Li W. The transcriptional factors HIF-1 and HIF-2 and their novel inhibitors in cancer therapy. Expert Opin Drug Discov 2019; 14:667-682. [PMID: 31070059 DOI: 10.1080/17460441.2019.1613370] [Citation(s) in RCA: 200] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Introduction: Hypoxia is one of the intrinsic features of solid tumors, and it is always associated with aggressive phenotypes, including resistance to radiation and chemotherapy, metastasis, and poor patient prognosis. Hypoxia manifests these unfavorable effects through activation of a family of transcription factors, Hypoxia-inducible factors (HIFs) play a pivotal role in the adaptation of tumor cells to hypoxic and nutrient-deprived conditions by upregulating the transcription of several pro-oncogenic genes. Several advanced human cancers share HIFs activation as a final common pathway. Areas covered: This review highlights the role and regulation of the HIF-1/2 in cancers and alludes on the biological complexity and redundancy of HIF-1/2 regulation. Moreover, this review summarizes recent insights into the therapeutic approaches targeting the HIF-1/2 pathway. Expert opinion: More studies are needed to unravel the extensive complexity of HIFs regulation and to develop more precise anticancer treatments. Inclusion of HIF-1/2 inhibitors to the current chemotherapy regimens has been proven advantageous in numerous reported preclinical studies. The combination therapy ideally should be personalized based on the type of mutations involved in the specific cancers, and it might be better to include two drugs that inhibit HIF-1/2 activity by synergistic molecular mechanisms.
Collapse
Affiliation(s)
- Najah Albadari
- a Department of Pharmaceutical Sciences, College of Pharmacy , University of Tennessee Health Science Center , Memphis , TN , USA
| | - Shanshan Deng
- a Department of Pharmaceutical Sciences, College of Pharmacy , University of Tennessee Health Science Center , Memphis , TN , USA
| | - Wei Li
- a Department of Pharmaceutical Sciences, College of Pharmacy , University of Tennessee Health Science Center , Memphis , TN , USA
| |
Collapse
|
27
|
Acun A, Zorlutuna P. CRISPR/Cas9 Edited Induced Pluripotent Stem Cell-Based Vascular Tissues to Model Aging and Disease-Dependent Impairment. Tissue Eng Part A 2019; 25:759-772. [PMID: 30704346 DOI: 10.1089/ten.tea.2018.0271] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
IMPACT STATEMENT Modeling human disease as precisely as possible is of upmost importance in understanding the underlying pathology and discovering effective therapies. Therefore, disease models that are highly controlled and composed of human-origin cells that present the disease phenotype are crucial. The human induced pluripotent stem cell (hiPSC)-based tissue model we present in this study is an important example of human-origin tissue model with controlled gene expression. Through CRISPR/Cas9 editing of hypoxia inducible factor 1α in hiPSCs, we developed tissue models that show the age and disease-dependent endothelial deterioration. This model holds promise for various biomedical applications as more realistic disease phenotypes can be created using fully human-origin platforms.
Collapse
Affiliation(s)
- Aylin Acun
- 1 Bioengineering Graduate Program and University of Notre Dame, Notre Dame, Indiana
| | - Pinar Zorlutuna
- 1 Bioengineering Graduate Program and University of Notre Dame, Notre Dame, Indiana.,2 Aerospace and Mechanical Engineering Department, University of Notre Dame, Notre Dame, Indiana
| |
Collapse
|
28
|
Muñoz‐Sánchez J, Chánez‐Cárdenas ME. The use of cobalt chloride as a chemical hypoxia model. J Appl Toxicol 2018; 39:556-570. [DOI: 10.1002/jat.3749] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/13/2018] [Accepted: 10/07/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Jorge Muñoz‐Sánchez
- Laboratorio de Patología Vascular CerebralInstituto Nacional de Neurología y Neurología (INNN) Insurgentes Sur 3877, la Fama 14269 Tlalpan Ciudad de México Mexico
| | - María E. Chánez‐Cárdenas
- Laboratorio de Patología Vascular CerebralInstituto Nacional de Neurología y Neurología (INNN) Insurgentes Sur 3877, la Fama 14269 Tlalpan Ciudad de México Mexico
| |
Collapse
|
29
|
Abstract
INTRODUCTION Hypoxia-inducible transcription factors have been identified as regulators of adaptive responses to hypoxia. Over the past 20 years, more than 8000 papers have described their increasingly complex role and regulation in cancer. Presently, it is recognized that hypoxia-inducible factors (HIFs) are regulated by oxygen-dependent and oxygen-independent mechanisms in cancer development; the list of their targets has increased to include more than 500 genes involved in most hallmarks of cancer. Areas covered: Most literature describes the function of HIF factors in solid tumors; however, in the past 10 years, evidence has steadily accumulated to indicate that HIFs are implicated in hematological malignancies. This review summarizes our current understanding of the function and regulation of HIF factors in hematopoiesis and leukemia. Moreover, we provide an update on pharmacological inhibitors of this pathway that have shown promising therapeutic effects in clinical trials or leukemia pre-clinical models. Expert opinion: The inhibition of the function of HIF factors may provide an interesting approach for treating leukemia. We posit that before moving into the clinic, we should (i) fully characterize the outcome of HIF inhibition in specific leukemia contexts (ii) test the possibility of combining HIF-targeting strategies with cytotoxic compounds and (iii) consider patient selection to increase therapeutic efficacy.
Collapse
Affiliation(s)
- Daniela Magliulo
- a Vita-Salute San Raffaele University , Milan , Italy.,b Preclinical Models of Cancer Laboratory, Division of Experimental Oncology , San Raffaele Scientific Institute , Milan , Italy
| | - Rosa Bernardi
- b Preclinical Models of Cancer Laboratory, Division of Experimental Oncology , San Raffaele Scientific Institute , Milan , Italy
| |
Collapse
|
30
|
Setty BA, Pillay Smiley N, Pool CM, Jin Y, Liu Y, Nelin LD. Hypoxia-induced proliferation of HeLa cells depends on epidermal growth factor receptor-mediated arginase II induction. Physiol Rep 2017; 5:5/6/e13175. [PMID: 28330951 PMCID: PMC5371558 DOI: 10.14814/phy2.13175] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/22/2017] [Accepted: 01/25/2017] [Indexed: 11/24/2022] Open
Abstract
Solid tumors can often be hypoxic in regions, and cancer cells can respond to hypoxia with an increase in proliferation and a decrease in apoptosis, leading to a net increase in viable cell numbers. We have recently found that in an osteosarcoma cell line, hypoxia-induced proliferation depends on arginase II induction. Epidermal growth factor receptor (EGFR) has been shown to mediate the hypoxia-induced cellular proliferation in some cancer cell lines. We hypothesized that hypoxia-induced proliferation of HeLa cells would depend on arginase II induction and that this induction of arginase II would occur through EGFR activation. Exposure of HeLa cells to hypoxia resulted in an upregulation of arginase II mRNA and protein levels, with no effect on arginase I expression. Hypoxia also resulted in significantly greater viable cell numbers than did normoxia. The hypoxia-induced increase in viable cell numbers was prevented by either a small molecule inhibitor of arginase or siRNA targeting arginase II Overexpression of arginase II resulted in an increase in viable cell numbers both in normoxia and hypoxia. Hypoxia caused a substantial induction of both epidermal growth factor (EGF) and EGFR Preventing hypoxia-induced EGFR expression using siRNA abolished hypoxia-induced arginase II expression and the increase in viable cell numbers. Treatment with EGF in normoxia not only induced arginase II expression but also resulted in an increase in viable cell numbers. Blocking EGF interactions with EGFR using either an EGF neutralizing antibody or an EGFR antibody prevented the hypoxia-induced increase in viable cell numbers. These results demonstrate an EGF/EGFR/arginase II pathway that is necessary for hypoxic proliferation in HeLa cells.
Collapse
Affiliation(s)
- Bhuvana A Setty
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Natasha Pillay Smiley
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Caitlyn M Pool
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Yi Jin
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Yusen Liu
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Leif D Nelin
- Pulmonary Hypertension Group, Center for Perinatal Research The Research Institute at Nationwide Children's Hospital, Columbus, Ohio .,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| |
Collapse
|
31
|
Galeano-Garces C, Camilleri ET, Riester SM, Dudakovic A, Larson DR, Qu W, Smith J, Dietz AB, Im HJ, Krych AJ, Larson AN, Karperien M, van Wijnen AJ. Molecular Validation of Chondrogenic Differentiation and Hypoxia Responsiveness of Platelet-Lysate Expanded Adipose Tissue-Derived Human Mesenchymal Stromal Cells. Cartilage 2017; 8:283-299. [PMID: 28618870 PMCID: PMC5625857 DOI: 10.1177/1947603516659344] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE To determine the optimal environmental conditions for chondrogenic differentiation of human adipose tissue-derived mesenchymal stromal/stem cells (AMSCs). In this investigation we specifically investigate the role of oxygen tension and 3-dimensional (3D) culture systems. DESIGN Both AMSCs and primary human chondrocytes were cultured for 21 days in chondrogenic media under normoxic (21% oxygen) or hypoxic (2% oxygen) conditions using 2 distinct 3D culture methods (high-density pellets and poly-ε-caprolactone [PCL] scaffolds). Histologic analysis of chondro-pellets and the expression of chondrocyte-related genes as measured by reverse transcriptase quantitative polymerase chain reaction were used to evaluate the efficiency of differentiation. RESULTS AMSCs are capable of expressing established cartilage markers including COL2A1, ACAN, and DCN when grown in chondrogenic differentiation media as determined by gene expression and histologic analysis of cartilage markers. Expression of several cartilage-related genes was enhanced by low oxygen tension, including ACAN and HAPLN1. The pellet culture environment also promoted the expression of hypoxia-inducible cartilage markers compared with cells grown on 3D scaffolds. CONCLUSIONS Cell type-specific effects of low oxygen and 3D environments indicate that mesenchymal cell fate and differentiation potential is remarkably sensitive to oxygen. Genetic programming of AMSCs to a chondrocytic phenotype is effective under hypoxic conditions as evidenced by increased expression of cartilage-related biomarkers and biosynthesis of a glycosaminoglycan-positive matrix. Lower local oxygen levels within cartilage pellets may be a significant driver of chondrogenic differentiation.
Collapse
Affiliation(s)
- Catalina Galeano-Garces
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA,Department of Developmental Bioengineering, University of Twente, Enschede, Netherlands
| | | | - Scott M. Riester
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Amel Dudakovic
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Dirk R. Larson
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Wenchun Qu
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, USA
| | - Jay Smith
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, USA
| | - Allan B. Dietz
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Hee-Jeong Im
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | - Aaron J. Krych
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - A. Noelle Larson
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Marcel Karperien
- Department of Developmental Bioengineering, University of Twente, Enschede, Netherlands
| | - Andre J. van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA,Andre J. van Wijnen, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
| |
Collapse
|
32
|
Exploring the molecular basis of adaptive evolution in hydrothermal vent crab Austinograea alayseae by transcriptome analysis. PLoS One 2017; 12:e0178417. [PMID: 28552991 PMCID: PMC5446156 DOI: 10.1371/journal.pone.0178417] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 05/12/2017] [Indexed: 12/12/2022] Open
Abstract
Elucidating the genetic mechanisms of adaptation to the hydrothermal vent in organisms at genomic level is significant for understanding the adaptive evolution process in the extreme environment. We performed RNA-seq on four different tissues of a vent crab species, Austinograea alayseae, producing 725,461 unigenes and 134,489 annotated genes. Genes related to sensory, circadian rhythm, hormone, hypoxia stress, metal detoxification and immunity were identified. It was noted that in the degenerated eyestalk, transcription of phototransduction related genes which are important for retinal function was greatly reduced; three crucial neuropeptide hormones, one molt-inhibiting and two crustacean hyperglycemic hormone precursors were characterized with conserved domains; hypoxia-inducible factor 1 and two novel isoforms of metallothioneins in the vent crabs were discovered. An analysis of 6,932 orthologs among three crabs A. alayseae, Portunus trituberculutus and Eriocheir sinensis revealed 19 positive selected genes (PSGs). Most of the PSGs were involved in immune responses, such as crustins and anti-lipopolysaccharide factor, suggesting their function in the adaptation to environment. The characterization of the first vent crab transcriptome provides abundant resources for genetic and evolutionary studies of this species, and paves the way for further investigation of vent adaptation process in crabs.
Collapse
|
33
|
Frohwitter G, Buerger H, Korsching E, van Diest PJ, Kleinheinz J, Fillies T. Site-specific gene expression patterns in oral cancer. Head Face Med 2017; 13:6. [PMID: 28486965 PMCID: PMC5424406 DOI: 10.1186/s13005-017-0138-0] [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: 05/12/2016] [Accepted: 04/19/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Squamous cell carcinomas (SCCs) are the most prevalent malignant tumours within the head and neck. Evidence exists that distinct genes are differentially regulated in SCCs of the oral cavity compared to other head and neck regions. Given this background, the aim of this study was to investigate whether such tumour site-specific gene expression can also be observed in different localizations within the oral cavity. METHODS Using tissue microarrays (TMAs), we investigated 76 SCCs of the floor of the mouth, 49 SCCs of the tongue and 68 SCCs of other anatomic regions within the oral cavity. The expression of 17 genes involved in cell cycle and growth control (p16, p21, p27, p53, cyclin D1, EGFR, c-kit, bcl-6), cell adhesion (alpha-, beta-, and gamma-catenin), and apoptosis/stress response genes (Hif-1-alpha, Glut 1, CA IX, caspase, hsp70, XIAP) were investigated by means of immunohistochemistry. The data were subjected to chi2, interdependency and Kaplan-Meier analysis. RESULTS Our study suggests a remote difference in the site-specific gene expression patterns of oral cancer. X-linked inhibitor of apoptosis (XIAP) showed a significantly higher expression (p <0.05) in SCCs of the floor of the mouth compared to SCCs of the tongue and other locations within the oral cavity. The increased XIAP expression was further associated with significantly decreased overall survival in all cases of SCCs of the oral cavity (p <0.05). Expression levels of p53, CA IX, beta-catenin, Hif-1-alpha, and c-kit were also observed to be inversely related between SCCs of the floor of the mouth and those of the tongue respectively, although these differences did not reach statistical significance. Overall and event-free survival did not differ in patients with T1/T2/N0 SCCs according to tumour localization. CONCLUSION In summary, the protein expression patterns of SCCs of the oral cavity suggest the existence of a molecular and morphological spectrum of SCCs in the oral cavity. In particular the expression pattern of XIAP indicates distinct gene expression patterns between carcinomas of the floor of the mouth and oral tongue cancer. Further studies are needed to identify possible tumour site-specific factors that influence patient prognosis and management.
Collapse
Affiliation(s)
- Gesche Frohwitter
- Institute of Pathology, Husener Str. 46a, 33098, Paderborn, Höxter, Germany.
| | - Horst Buerger
- Institute of Pathology, Husener Str. 46a, 33098, Paderborn, Höxter, Germany.,Institute of Pathology, University of Utrecht, Utrecht, The Netherlands
| | | | - Paul J van Diest
- Institute of Pathology, University of Utrecht, Utrecht, The Netherlands
| | - Johannes Kleinheinz
- Department of Cranio- and Maxillofacial Surgery, University Hospital Muenster, Muenster, Germany
| | - Thomas Fillies
- Department of Cranio- and Maxillofacial Surgery, Marienhospital Stuttgart, Stuttgart, Germany
| |
Collapse
|
34
|
Millar LJ, Shi L, Hoerder-Suabedissen A, Molnár Z. Neonatal Hypoxia Ischaemia: Mechanisms, Models, and Therapeutic Challenges. Front Cell Neurosci 2017; 11:78. [PMID: 28533743 PMCID: PMC5420571 DOI: 10.3389/fncel.2017.00078] [Citation(s) in RCA: 213] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/07/2017] [Indexed: 12/11/2022] Open
Abstract
Neonatal hypoxia-ischaemia (HI) is the most common cause of death and disability in human neonates, and is often associated with persistent motor, sensory, and cognitive impairment. Improved intensive care technology has increased survival without preventing neurological disorder, increasing morbidity throughout the adult population. Early preventative or neuroprotective interventions have the potential to rescue brain development in neonates, yet only one therapeutic intervention is currently licensed for use in developed countries. Recent investigations of the transient cortical layer known as subplate, especially regarding subplate's secretory role, opens up a novel set of potential molecular modulators of neonatal HI injury. This review examines the biological mechanisms of human neonatal HI, discusses evidence for the relevance of subplate-secreted molecules to this condition, and evaluates available animal models. Neuroserpin, a neuronally released neuroprotective factor, is discussed as a case study for developing new potential pharmacological interventions for use post-ischaemic injury.
Collapse
Affiliation(s)
- Lancelot J. Millar
- Molnár Group, Department of Physiology, Anatomy and Genetics, University of OxfordOxford, UK
| | - Lei Shi
- Molnár Group, Department of Physiology, Anatomy and Genetics, University of OxfordOxford, UK
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, College of Pharmacy, Jinan UniversityGuangzhou, China
| | | | - Zoltán Molnár
- Molnár Group, Department of Physiology, Anatomy and Genetics, University of OxfordOxford, UK
| |
Collapse
|
35
|
Wang Z, Fang H, Tang NLS, Deng M. VCNet: vector-based gene co-expression network construction and its application to RNA-seq data. Bioinformatics 2017; 33:2173-2181. [DOI: 10.1093/bioinformatics/btx131] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 03/07/2017] [Indexed: 11/12/2022] Open
Affiliation(s)
- Zengmiao Wang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Huaying Fang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
- LMAM, School of Mathematical Sciences, Peking University, Beijing, China
| | - Nelson Leung-Sang Tang
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Minghua Deng
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
- LMAM, School of Mathematical Sciences, Peking University, Beijing, China
- Center for Statistical Science, Peking University, Beijing, China
| |
Collapse
|
36
|
Klasvogt S, Zuschratter W, Schmidt A, Kröber A, Vorwerk S, Wolter R, Isermann B, Wimmers K, Rothkötter HJ, Nossol C. Air-liquid interface enhances oxidative phosphorylation in intestinal epithelial cell line IPEC-J2. Cell Death Discov 2017; 3:17001. [PMID: 28250970 PMCID: PMC5327501 DOI: 10.1038/cddiscovery.2017.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/07/2016] [Accepted: 12/13/2016] [Indexed: 02/07/2023] Open
Abstract
The intestinal porcine epithelial cell line IPEC-J2, cultured under the air-liquid interface (ALI) conditions, develops remarkable morphological characteristics close to intestinal epithelial cells in vivo. Improved oxygen availability has been hypothesised to be the leading cause of this morphological differentiation. We assessed oxygen availability in ALI cultures and examined the influence of this cell culture method on glycolysis and oxidative phosphorylation in IPEC-J2 using the submerged membrane culture (SMC) and ALI cultures. Furthermore, the role of HIF-1 as mediator of oxygen availability was analysed. Measurements of oxygen tension confirmed increased oxygen availability at the medium-cell interface and demonstrated reduced oxygen extraction at the basal compartment in ALI. Microarray analysis to determine changes in the genetic profile of IPEC-J2 in ALI identified 2751 modified transcripts. Further examinations of candidate genes revealed reduced levels of glycolytic enzymes hexokinase II and GAPDH, as well as lactate transporting monocarboxylate transporter 1 in ALI, whereas expression of the glucose transporter GLUT1 remained unchanged. Cytochrome c oxidase (COX) subunit 5B protein analysis was increased in ALI, although mRNA level remained at constant level. COX activity was assessed using photometric quantification and a three-fold increase was found in ALI. Quantification of glucose and lactate concentrations in cell culture medium revealed significantly reduced glucose levels and decreased lactate production in ALI. In order to evaluate energy metabolism, we measured cellular adenosine triphosphate (ATP) aggregation in homogenised cell suspensions showing similar levels. However, application of the uncoupling agent FCCP reduced ATP levels in ALI but not in SMC. In addition, HIF showed reduced mRNA levels in ALI. Furthermore, HIF-1α protein was reduced in the nuclear compartment of ALI when compared to SCM as confirmed by confocal microscopy. These results indicate a metabolic switch in IPEC-J2 cultured under ALI conditions enhancing oxidative phosphorylation and suppressing glycolysis. ALI-induced improvement of oxygen supply reduced nuclear HIF-1α, demonstrating a major change in the transcriptional response.
Collapse
Affiliation(s)
- Sonja Klasvogt
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Werner Zuschratter
- Leibniz Institute for Neurobiology , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Anke Schmidt
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Andrea Kröber
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Sandra Vorwerk
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Romina Wolter
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Berend Isermann
- Institute of Clinical Chemistry and Pathochemistry, Otto-von-Guericke University , Magdeburg 39120, Germany
| | - Klaus Wimmers
- Leibniz Institute for Farm Animal Biology , Dummerstorf 18196, Germany
| | | | - Constanze Nossol
- Institute of Anatomy , Otto-von-Guericke University, Magdeburg 39120, Germany
| |
Collapse
|
37
|
Martin D, McKenna H, Livina V. The human physiological impact of global deoxygenation. J Physiol Sci 2016; 67:97-106. [PMID: 27848144 PMCID: PMC5138252 DOI: 10.1007/s12576-016-0501-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 10/28/2016] [Indexed: 12/19/2022]
Abstract
There has been a clear decline in the volume of oxygen in Earth’s atmosphere over the past 20 years. Although the magnitude of this decrease appears small compared to the amount of oxygen in the atmosphere, it is difficult to predict how this process may evolve, due to the brevity of the collected records. A recently proposed model predicts a non-linear decay, which would result in an increasingly rapid fall-off in atmospheric oxygen concentration, with potentially devastating consequences for human health. We discuss the impact that global deoxygenation, over hundreds of generations, might have on human physiology. Exploring the changes between different native high-altitude populations provides a paradigm of how humans might tolerate worsening hypoxia over time. Using this model of atmospheric change, we predict that humans may continue to survive in an unprotected atmosphere for ~3600 years. Accordingly, without dramatic changes to the way in which we interact with our planet, humans may lose their dominance on Earth during the next few millennia.
Collapse
Affiliation(s)
- Daniel Martin
- UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, University College London Centre for Altitude Space and Extreme Environment Medicine, First Floor, 170 Tottenham Court Road, London, W1T 7HA, UK. .,Intensive Care Unit, Royal Free Hospital, Pond Street, London, NW3 2QG, UK. .,Royal Free Hospital, University College London Division of Surgery and Interventional Science, Pond Street, London, NW3 2QG, UK.
| | - Helen McKenna
- UCLH NIHR Biomedical Research Centre, Institute of Sport and Exercise Health, University College London Centre for Altitude Space and Extreme Environment Medicine, First Floor, 170 Tottenham Court Road, London, W1T 7HA, UK.,Royal Free Hospital, University College London Division of Surgery and Interventional Science, Pond Street, London, NW3 2QG, UK
| | - Valerie Livina
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| |
Collapse
|
38
|
Hurst JH. William Kaelin, Peter Ratcliffe, and Gregg Semenza receive the 2016 Albert Lasker Basic Medical Research Award. J Clin Invest 2016; 126:3628-3638. [PMID: 27620538 DOI: 10.1172/jci90055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
39
|
Sung WW, Chu YC, Chen PR, Liao MH, Lee JW. Positive regulation of HIF-1A expression by EBV oncoprotein LMP1 in nasopharyngeal carcinoma cells. Cancer Lett 2016; 382:21-31. [PMID: 27567526 DOI: 10.1016/j.canlet.2016.08.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/22/2016] [Accepted: 08/22/2016] [Indexed: 12/11/2022]
Abstract
Latent membrane protein 1 (LMP1) is a pivotal viral oncoprotein that contributes to the carcinogenesis of Epstein-Barr virus (EBV)-associated malignancies, including nasopharyngeal carcinoma (NPC). We investigated the regulation of hypoxia-inducible factor 1-α (HIF-1α) by LMP1. In NPC cells, we found that LMP1 significantly enhanced the HIF-1α mRNA level, and not only the protein amount as described previously. Mechanistically, the stability of the HIF-1α transcript was remarkably prolonged by LMP1 via reduced expressions of RNA-destabilizing proteins tristetraprolin (TTP) and pumilio RNA-binding family member 2 (PUM2) through C-terminal activation region 1 (CTAR1) and CTAR3 interaction with the ERK1/2 and STAT3 signaling pathways, respectively, in parallel with hindrance of PUM2 binding to the HIF-1α mRNA 3'-untranslated region (3'-UTR). On the other hand, HIF-1A promoter activity was also obviously facilitated by the LMP1 CTAR1-recruited ERK1/2/NF-κB pathway. Intriguingly, in this scenario, augmented HIF-1α further exhibited positive auto-regulation of its own gene transcription. Our results showed the first time that LMP1 directly up-regulates HIF-1A transcription and post-transcription in NPC cells, in addition to providing evidence of an increase in the HIF-1α mRNA level caused by a tumor-associated virus under normoxic conditions.
Collapse
Affiliation(s)
- Wei-Wen Sung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Yi-Chih Chu
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Peir-Rong Chen
- Department of Otolaryngology, Buddhist Tzu Chi General Hospital, Hualien, Taiwan
| | - Ming-Hui Liao
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan.
| | - Jeng-Woei Lee
- Department of Life Sciences, Tzu-Chi University, Hualien, Taiwan; Institute of Medical Sciences, Tzu-Chi University, Hualien, Taiwan.
| |
Collapse
|
40
|
Simko V, Takacova M, Debreova M, Laposova K, Ondriskova-Panisova E, Pastorekova S, Csaderova L, Pastorek J. Dexamethasone downregulates expression of carbonic anhydrase IX via HIF-1α and NF-κB-dependent mechanisms. Int J Oncol 2016; 49:1277-88. [PMID: 27431580 PMCID: PMC5021256 DOI: 10.3892/ijo.2016.3621] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/21/2016] [Indexed: 12/31/2022] Open
Abstract
Dexamethasone is a synthetic glucocorticoid frequently used to suppress side-effects of anticancer chemotherapy. In the present study, we showed that dexamethasone treatment leads to concentration-dependent downregulation of cancer-associated marker, carbonic anhydrase IX (CA IX), at the level of promoter activity, mRNA and protein expression in 2D and 3D cancer cell models. The effect of dexamethasone on CA IX expression under hypoxic conditions is predominantly mediated by impaired transcriptional activity and decreased protein level of the main hypoxic transcription factor HIF-1α. In addition, CA9 downregulation can be caused by protein-protein interactions between activated glucocorticoid receptors, major effectors of glucocorticoid action, and transcription factors that trigger CA9 transcription (e.g. AP-1). Moreover, we identified a potential NF-κB binding site in the CA9 promoter and propose the involvement of NF-κB in the dexamethasone-mediated inhibition of CA9 transcription. As high level of CA IX is often linked to aggressive tumor behavior, poor prognosis and chemo- and radiotherapy resistance, uncovering its reduction after dexa-methasone treatment and implication of additional regulatory mechanisms can be relevant for the CA IX-related clinical applications.
Collapse
Affiliation(s)
- Veronika Simko
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Martina Takacova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Michaela Debreova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Katarina Laposova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Elena Ondriskova-Panisova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Silvia Pastorekova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Lucia Csaderova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Jaromir Pastorek
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovak Republic
| |
Collapse
|
41
|
Abstract
The MYC oncogene plays a pivotal role in the development and progression of human cancers. It encodes a transcription factor that has broad reaching effects on many cellular functions, most importantly in driving cell growth through regulation of genes involved in ribosome biogenesis, metabolism, and cell cycle. Upon binding DNA with its partner MAX, MYC recruits factors that release paused RNA polymerases to drive transcription and amplify gene expression. At physiologic levels of MYC, occupancy of high-affinity DNA-binding sites drives 'house-keeping' metabolic genes and those involved in ribosome and mitochondrial biogenesis for biomass accumulation. At high oncogenic levels of MYC, invasion of low-affinity sites and enhancer sequences alter the transcriptome and cause metabolic imbalances, which activates stress response and checkpoints such as p53. Loss of checkpoints unleashes MYC's full oncogenic potential to couple metabolism with neoplastic cell growth and division. Cells that overexpress MYC, however, are vulnerable to metabolic perturbations that provide potential new avenues for cancer therapy.
Collapse
|
42
|
Xiong X, Fu M, Lan D, Li J, Zi X, Zhong J. Yak response to high-altitude hypoxic stress by altering mRNA expression and DNA methylation of hypoxia-inducible factors. Anim Biotechnol 2015; 26:222-9. [PMID: 25927169 DOI: 10.1080/10495398.2014.1002563] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Hypoxia-inducible factors (HIFs) are oxygen-dependent transcriptional activators, which play crucial roles in tumor angiogenesis and mammalian development, and regulate the transcription of genes involved in oxygen homeostasis in response to hypoxia. However, information on HIF-1α and HIF-2α in yak (Bos grunniens) is scarce. The complete coding region of yak HIF-2α was cloned, its mRNA expression in several tissues were determined, and the expression levels were compared with those of closely related low-altitude cattle (Bos taurus), and the methylation status of promoter regions were analyzed to better understand the roles of HIF-1α and HIF-2α in domesticated yak. The yak HIF-2α cDNA was cloned and sequenced in the present work reveals the evolutionary conservation through multiple sequence alignment, although 15 bases changed, resulting in 8 amino acid substitutions in the translated proteins in cattle. The tissue-specific expression results showed that HIF-1α is ubiquitously expressed, whereas HIF-2α expression is limited to endothelial tissues (kidney, heart, lung, spleen, and liver) and blood in yak. Both HIF-1α and HIF-2α expressions were higher in yak tissues than in cattle. The HIF-1α expression level is much higher in yak than cattle in these organs, except for the lung (P < 0.05), but the HIF-2α gene is significantly different in the heart, spleen, and kidney (P < 0.05). Furthermore, the methylation levels in the 5' flanking regulatory regions of HIF-1α and HIF-2α in yak kidney were significantly decreased than cattle counterparts (P < 0.05). Identifying these genes and the comparison of different expressions facilitates the understanding of the biological high-altitude hypoxic stress response mechanism and may assist current medical research to understand hypoxia-related diseases.
Collapse
Affiliation(s)
- Xianrong Xiong
- a College of Life Science and Technology , Southwest University for Nationalities , Chengdu , Sichuan , China
| | | | | | | | | | | |
Collapse
|
43
|
Chatzi C, Schnell E, Westbrook GL. Localized hypoxia within the subgranular zone determines the early survival of newborn hippocampal granule cells. eLife 2015; 4:e08722. [PMID: 26476335 PMCID: PMC4714973 DOI: 10.7554/elife.08722] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 10/16/2015] [Indexed: 01/09/2023] Open
Abstract
The majority of adult hippocampal newborn cells die during early differentiation from intermediate progenitors (IPCs) to immature neurons. Neural stem cells in vivo are located in a relative hypoxic environment, and hypoxia enhances their survival, proliferation and stemness in vitro. Thus, we hypothesized that migration of IPCs away from hypoxic zones within the SGZ might result in oxidative damage, thus triggering cell death. Hypoxic niches were observed along the SGZ, composed of adult NSCs and early IPCs, and oxidative byproducts were present in adjacent late IPCs and neuroblasts. Stabilizing hypoxia inducible factor-1α with dimethyloxallyl glycine increased early survival, but not proliferation or differentiation, in neurospheres in vitro and in newly born SGZ cells in vivo. Rescue experiments in Bax(fl/fl) mutants supported these results. We propose that localized hypoxia within the SGZ contributes to the neurogenic microenvironment and determines the early, activity-independent survival of adult hippocampal newborn cells.
Collapse
Affiliation(s)
- Christina Chatzi
- The Vollum Institute, Oregon Health and Science University, Portland, United States
| | - Eric Schnell
- Department of Anesthesiology and Perioperative Medicine, Oregon Health and Science University, Portland, United States.,United States Department of Veterans Affairs, VA Portland Health Care System, Portland, United States
| | - Gary L Westbrook
- The Vollum Institute, Oregon Health and Science University, Portland, United States
| |
Collapse
|
44
|
Pichu S, Sathiyamoorthy J, Krishnamoorthy E, Umapathy D, Viswanathan V. Impact of the hypoxia inducible factor-1α (HIF-1α) pro582ser polymorphism and its gene expression on diabetic foot ulcers. Diabetes Res Clin Pract 2015; 109:533-40. [PMID: 26113285 DOI: 10.1016/j.diabres.2015.05.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 04/08/2015] [Accepted: 05/03/2015] [Indexed: 12/18/2022]
Abstract
AIM Adaptation to low oxygen tension (hypoxia) in cells and tissues leads to the transcriptional induction of series of genes and the primary factor mediating this response is the hypoxia-inducible factor-1α. This study was designed in order to examine the HIF-1α gene polymorphism, p582s (rs11549465) in Exon-12 of HIF-1α gene in diabetic subjects with and without foot ulcers (DFU) and to find its expression under these pathological conditions. METHODS A total of 224 subjects from our tertiary care centre were included, which consists of healthy controls (N=66), type 2 diabetes mellitus (T2DM) (N=79) and T2DM with foot ulcers (DFU) (N=79). Allelic and genotypic comparisons between the different groups were evaluated by PCR-RFLP. The gene expression studies on selected samples (N=15 of each group) were done by Semi-quantitative real time PCR. RESULTS AND DISCUSSIONS Genotype analysis showed a significant increase in presence of 'T' allele in T2DM & DFU when compared to that of control subjects. Allele wise analysis showed a higher frequency of 'T' allele in the T2DM (62.03%) when compared to that of control subjects (53.79%). Interestingly, semi-quantitative RT-PCR results showed decreased expression of HIF-1α gene on DFU when compared to that of T2DM and control subjects. CONCLUSION Our findings predict that there is an association of HIF-1α gene polymorphism on foot ulcer patients when compare to that of healthy controls. Semi-quantitative real time studies showed decreased HIF-1α gene expression on foot ulcer patients suggesting its possible role on the pathogenesis.
Collapse
Affiliation(s)
- Sivakamasundari Pichu
- Prof. M. Viswanathan Diabetes Research Centre, MV Hospital for Diabetes, Royapuram, Chennai 600013, Tamil Nadu, India.
| | - Jayalalitha Sathiyamoorthy
- Prof. M. Viswanathan Diabetes Research Centre, MV Hospital for Diabetes, Royapuram, Chennai 600013, Tamil Nadu, India
| | - Ezhilarasi Krishnamoorthy
- Prof. M. Viswanathan Diabetes Research Centre, MV Hospital for Diabetes, Royapuram, Chennai 600013, Tamil Nadu, India
| | - Dhamodharan Umapathy
- Prof. M. Viswanathan Diabetes Research Centre, MV Hospital for Diabetes, Royapuram, Chennai 600013, Tamil Nadu, India
| | - Vijay Viswanathan
- Prof. M. Viswanathan Diabetes Research Centre, MV Hospital for Diabetes, Royapuram, Chennai 600013, Tamil Nadu, India.
| |
Collapse
|
45
|
Maybin JA, Critchley HOD. Menstrual physiology: implications for endometrial pathology and beyond. Hum Reprod Update 2015; 21:748-61. [PMID: 26253932 PMCID: PMC4594618 DOI: 10.1093/humupd/dmv038] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 07/08/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Each month the endometrium becomes inflamed, and the luminal portion is shed during menstruation. The subsequent repair is remarkable, allowing implantation to occur if fertilization takes place. Aberrations in menstrual physiology can lead to common gynaecological conditions, such as heavy or prolonged bleeding. Increased knowledge of the processes involved in menstrual physiology may also have translational benefits at other tissue sites. METHODS Pubmed and Cochrane databases were searched for all original and review articles published in English until April 2015. Search terms included ‘endometrium’, ‘menstruation’, ‘endometrial repair’, ‘endometrial regeneration’ ‘angiogenesis’, ‘inflammation’ and ‘heavy menstrual bleeding’ or ‘menorrhagia’. RESULTS Menstruation occurs naturally in very few species. Human menstruation is thought to occur as a consequence of preimplantation decidualization, conferring embryo selectivity and the ability to adapt to optimize function. We highlight how current and future study of endometrial inflammation, vascular changes and repair/regeneration will allow us to identify new therapeutic targets for common gynaecological disorders. In addition, we describe how increased knowledge of this endometrial physiology will have many translational applications at other tissue sites. We highlight the clinical applications of what we know, the key questions that remain and the scientific and medical possibilities for the future. CONCLUSIONS The study of menstruation, in both normal and abnormal scenarios, is essential for the production of novel, acceptable medical treatments for common gynaecological complaints. Furthermore, collaboration and communication with specialists in other fields could significantly advance the therapeutic potential of this dynamic tissue.
Collapse
Affiliation(s)
- Jacqueline A Maybin
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Hilary O D Critchley
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| |
Collapse
|
46
|
Alter AS, Engelstad K, Hinton VJ, Montes J, Pearson TS, Akman CI, De Vivo DC. Long-term clinical course of Glut1 deficiency syndrome. J Child Neurol 2015; 30:160-9. [PMID: 24789115 DOI: 10.1177/0883073814531822] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Our objective is to characterize the long-term course of Glut1 deficiency syndrome. Longitudinal outcome measures, including Columbia Neurological Scores, neuropsychological tests, and adaptive behavior reports, were collected for 13 participants with Glut1 deficiency syndrome who had been followed for an average of 14.2 (range = 8.9-23.6) years. A parent questionnaire assessed manifestations throughout development. The 6-Minute Walk Test captured gait disturbances and triggered paroxysmal exertional dyskinesia. All longitudinal outcomes remained stable over time. Epilepsy dominated infancy and improved during childhood. Dystonia emerged during childhood or adolescence. Earlier introduction of the ketogenic diet correlated with better long-term outcomes on some measures. Percent-predicted 6-Minute Walk Test distance correlated significantly with Columbia Neurological Scores. We conclude that Glut1 deficiency syndrome is a chronic condition, dominated by epilepsy in infancy and by movement disorders thereafter. Dietary treatment in the first postnatal months may effect improved outcomes, emphasizing the importance of early diagnosis and treatment.
Collapse
Affiliation(s)
- Aliza S Alter
- Department of Neurology, Columbia University, New York, NY, USA
| | | | - Veronica J Hinton
- Department of Neurology, Columbia University, New York, NY, USA Gertrude Sergievsky Center, Columbia University, New York, NY, USA
| | | | - Toni S Pearson
- Department of Neurology, Columbia University, New York, NY, USA
| | - Cigdem I Akman
- Department of Neurology, Columbia University, New York, NY, USA
| | | |
Collapse
|
47
|
Gemenetzi M, Lotery AJ. The role of epigenetics in age-related macular degeneration. Eye (Lond) 2014; 28:1407-17. [PMID: 25233816 DOI: 10.1038/eye.2014.225] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 07/31/2014] [Indexed: 12/27/2022] Open
Abstract
It is becoming increasingly evident that epigenetic mechanisms influence gene expression and can explain how interactions between genetics and the environment result in particular phenotypes during development. The extent to which this epigenetic effect contributes to phenotype heritability in age-related macular degeneration (AMD) is currently ill defined. However, emerging evidence suggests that epigenetic changes are relevant to AMD and as such provide an exciting new avenue of research for AMD. This review addresses information on the impact of posttranslational modification of the genome on the pathogenesis of AMD, such as DNA methylation changes affecting antioxidant gene expression, hypoxia-regulated alterations in chromatin structure, and histone acetylation status in relation to angiogenesis and inflammation. It also contains information on the role of non-coding RNA-mediated gene regulation in AMD at a posttranscriptional (before translation) level. Our aim was to review the epigenetic mechanisms that cause heritable changes in gene activity without changing the DNA sequence. We also describe some long-term alterations in the transcriptional potential of a cell, which are not necessarily heritable but remains to be defined in the future. Increasing understanding of the significance of common and rare genetic variants and their relationship to epigenetics and environmental influences may help in establishing methods to assess the risk of AMD. This in turn may allow new therapeutic interventions for the leading cause of central vision impairment in patients over the age of 50 years in developed countries. Search strategy We searched the MEDLINE/PubMed database following MeSH suggestions for articles including the terms: 'ocular epigenetic mechanisms', 'human disease epigenetics', and 'age-related macular degeneration genetics'. The headline used to locate related articles in PubMed was 'epigenetics in ocular disease', and to restrict search, we used the headlines 'DNA methylation in age related macular degeneration', 'altered gene expression in AMD pathogenesis'. A manual search was also based on references from these articles as well as review articles.
Collapse
Affiliation(s)
- M Gemenetzi
- Southampton Eye Unit, Southampton University Hospital, Southampton, UK
| | - A J Lotery
- 1] Southampton Eye Unit, Southampton University Hospital, Southampton, UK [2] Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, University Hospital Southampton, Southampton, UK
| |
Collapse
|
48
|
Saini MK, Sanyal SN. Targeting angiogenic pathway for chemoprevention of experimental colon cancer using C-phycocyanin as cyclooxygenase-2 inhibitor. Biochem Cell Biol 2014; 92:206-18. [DOI: 10.1139/bcb-2014-0016] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
An angiogenic pathway was studied that involved stromal tissue degradation with matrix metalloproteinases (MMPs), vesicular endothelial growth factor-A (VEGF-A), and hypoxia inducible factor-1α (HIF-1α) mediated growth regulation in a complex interaction with chemokines, such as monocyte chemoattractant protein-1 (MCP-1) and macrophage inflammatory protein-1β (MIP-1β). Gene and protein expression was studied with real-time PCR, Western immunoblot, and immunofluorescence. Morphological and histopathological analysis of tumor was done, as also the activity of MMPs and HIF-1α by gelatin zymography and ELISA. Binding interactions of proteins were studied by molecular docking. Piroxicam, a traditional NSAID and C-phycocyanin, a biliprotein from Spirulina platensis, were utilized in the chemoprevention of DMH-induced rat colon cancer. A significant number of tumors was evident in DMH treated animals, while with piroxicam and C-phycocyanin, the number and size of tumors/lesions were reduced. Colonic tissues showed severe dysplasia, tubular adenoma, and adenocarcinoma from DMH, with invasive features along with signet ring cell carcinoma. No occurrence of carcinoma was detected in either of the drug treatments or in a combination regimen. An elevated VEGF-A, MMP-2, and MMP-9 level was observed, which is required for metastasis and invasion into surrounding tissues. Drugs induced chemoprevention by down-regulating these proteins. Piroxicam docked in VEGF-A binding site of VEGF-A receptors i.e., VEGFR1 and VEGFR2, while phycocyanobilin (a chromophore of C-phycocyanin) docked with VEGFR1 alone. HIF-1α is up-regulated which is associated with increased oxygen demand and angiogenesis. MCP-1 and MIP-1β expression was also found altered in DMH and regulated by the drugs. Anti-angiogenic role of piroxicam and C-phycocyanin is well demonstrated.
Collapse
|
49
|
Chen H, Long H, Cui X, Zhou J, Xu M, Yuan G. Exploring the formation and recognition of an important G-quadruplex in a HIF1α promoter and its transcriptional inhibition by a benzo[c]phenanthridine derivative. J Am Chem Soc 2014; 136:2583-91. [PMID: 24450937 DOI: 10.1021/ja412128w] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four putative G-quadruplex sequences (PGSs) in the HIF1α promoter and the 5'UTR were evaluated for their G-quadruplex-forming potential using ESI-MS, CD, FRET, DMS footprinting, and a polymerase stop assay. An important G-quadruplex (S1) has been proven to inhibit HIF1α transcription by blocking AP2 binding. A benzo[c]phenanthridine derivative was found to target the S1 G-quadruplex and induce its conformational conversion from antiparallel to parallel orientation. The transcriptional suppression of HIF1α by this compound was demonstrated using western blotting, Q-RT-PCR, luciferase assay, and ChIP. Our new findings provided a novel strategy for HIF1α regulation and potential insight for cancer therapy.
Collapse
Affiliation(s)
- Han Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | | | | | | | | | | |
Collapse
|
50
|
Lafleur VN, Richard S, Richard DE. Transcriptional repression of hypoxia-inducible factor-1 (HIF-1) by the protein arginine methyltransferase PRMT1. Mol Biol Cell 2014; 25:925-35. [PMID: 24451260 PMCID: PMC3952860 DOI: 10.1091/mbc.e13-07-0423] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Hypoxia-inducible factors (HIF) are essential for the adaptive response of cells to low-oxygen conditions. Transcription of HIF-α subunits and HIF activity are repressed by the arginine methyltransferase PRMT1. Therefore PRMT1 is a novel regulator of hypoxic cell responses. Hypoxia-inducible factors (HIF-1 and HIF-2) are essential mediators for the adaptive transcriptional response of cells and tissues to low-oxygen conditions. Under hypoxia or when cells are treated with various nonhypoxic stimuli, the active HIF-α subunits are mainly regulated through increased protein stabilization. For HIF-1α, it is clear that further transcriptional, translational, and posttranslational regulations are important for complete HIF-1 activity. Novel evidence links hypoxia and HIF-1 to arginine methylation, an important protein modification. These studies suggest that arginine methyltransferases may be important for hypoxic responses. Protein arginine methyltransferase 1 (PRMT1), the predominant arginine methyltransferase, can act as a transcriptional activator or repressor by modifying a diverse set of substrates. In this work, we show that PRMT1 is a repressor of both HIF-1 and HIF-2. The cellular depletion of PRMT1 by small interference RNA targeting leads to increased HIF transcriptional activity. This activation is the result of enhanced HIF-α subunit transcription, which allows increased HIF-α subunit availability. We provide evidence that PRMT1-dependent HIF-1α regulation is mediated through the activities of both specificity protein 1 (Sp1) and Sp3, two transcription factors known to control HIF-1α expression. This study therefore identifies PRMT1 as a novel regulator of HIF-1– and HIF-2–mediated responses.
Collapse
Affiliation(s)
- Véronique N Lafleur
- Centre de Recherche du CHU de Québec, L'Hôtel-Dieu de Québec, and Department of Molecular Biology, Medical Biochemistry and Pathology, Université Laval, Québec, QC G1R 2J6, Canada Lady Davis Institute for Medical Research, Sir Mortimer B. Davis Jewish General Hospital, and Departments of Oncology and Medicine, McGill University, Montréal, QC H3G 1Y6, Canada
| | | | | |
Collapse
|