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Iriondo O, Mecenas D, Li Y, Chin CR, Thomas A, Moriarty A, Marker R, Wang YJ, Hendrick H, Amzaleg Y, Ortiz V, MacKay M, Dickerson A, Lee G, Harotoonian S, Benayoun BA, Smith A, Mason CE, Roussos Torres ET, Klotz R, Yu M. Hypoxic Memory Mediates Prolonged Tumor-Intrinsic Type I Interferon Suppression to Promote Breast Cancer Progression. Cancer Res 2024; 84:3141-3157. [PMID: 38990731 PMCID: PMC11444891 DOI: 10.1158/0008-5472.can-23-2028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 05/03/2024] [Accepted: 07/03/2024] [Indexed: 07/13/2024]
Abstract
Hypoxia is a common feature of many solid tumors due to aberrant proliferation and angiogenesis that is associated with tumor progression and metastasis. Most of the well-known hypoxia effects are mediated through hypoxia-inducible factors (HIF). Identification of the long-lasting effects of hypoxia beyond the immediate HIF-induced alterations could provide a better understanding of hypoxia-driven metastasis and potential strategies to circumvent it. Here, we uncovered a hypoxia-induced mechanism that exerts a prolonged effect to promote metastasis. In breast cancer patient-derived circulating tumor cell lines and common breast cancer cell lines, hypoxia downregulated tumor-intrinsic type I IFN signaling and its downstream antigen presentation (AP) machinery in luminal breast cancer cells, via both HIF-dependent and HIF-independent mechanisms. Hypoxia induced durable IFN/AP suppression in certain cell types that was sustained after returning to normoxic conditions, presenting a "hypoxic memory" phenotype. Hypoxic memory of IFN/AP downregulation was established by specific hypoxic priming, and cells with hypoxic memory had an enhanced ability for tumorigenesis and metastasis. Overexpression of IRF3 enhanced IFN signaling and reduced tumor growth in normoxic, but not hypoxic, conditions. The histone deacetylase inhibitor entinostat upregulated IFN targets and erased the hypoxic memory. These results point to a mechanism by which hypoxia facilitates tumor progression through a long-lasting memory that provides advantages for circulating tumor cells during the metastatic cascade. Significance: Long-term cellular memory of hypoxia leads to sustained suppression of tumor-intrinsic type I IFN signaling and the antigen presentation pathway that facilitates tumorigenesis and metastasis. See related commentary by Purdy and Ford, p. 3125.
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Affiliation(s)
- Oihana Iriondo
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Center for Cooperative Research (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Derio, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain
| | - Desirea Mecenas
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Yilin Li
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Christopher R Chin
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, New York
| | - Amal Thomas
- Department of Molecular and Computational Biology, USC Dana and David Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
| | - Aidan Moriarty
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Rebecca Marker
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Yiru J Wang
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Haley Hendrick
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Yonatan Amzaleg
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry of the University of Southern California, Los Angeles, California
| | - Veronica Ortiz
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Matthew MacKay
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Amber Dickerson
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Grace Lee
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Sevana Harotoonian
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Bérénice A Benayoun
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Molecular and Computational Biology, USC Dana and David Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California
| | - Andrew Smith
- Department of Molecular and Computational Biology, USC Dana and David Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
| | - Christopher E Mason
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, New York
| | - Evanthia T Roussos Torres
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Remi Klotz
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
| | - Min Yu
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
- USC Norris Comprehensive Cancer Center, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland
- Marlene and Stewart Greenebaum NCI Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland
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Xun Z, Zhou H, Shen M, Liu Y, Sun C, Du Y, Jiang Z, Yang L, Zhang Q, Lin C, Hu Q, Ye Y, Han L. Identification of Hypoxia-ALCAM high Macrophage- Exhausted T Cell Axis in Tumor Microenvironment Remodeling for Immunotherapy Resistance. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309885. [PMID: 38956900 PMCID: PMC11434037 DOI: 10.1002/advs.202309885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 04/02/2024] [Indexed: 07/04/2024]
Abstract
Although hypoxia is known to be associated with immune resistance, the adaptability to hypoxia by different cell populations in the tumor microenvironment and the underlying mechanisms remain elusive. This knowledge gap has hindered the development of therapeutic strategies to overcome tumor immune resistance induced by hypoxia. Here, bulk, single-cell, and spatial transcriptomics are integrated to characterize hypoxia associated with immune escape during carcinogenesis and reveal a hypoxia-based intercellular communication hub consisting of malignant cells, ALCAMhigh macrophages, and exhausted CD8+ T cells around the tumor boundary. A hypoxic microenvironment promotes binding of HIF-1α complex is demonstrated to the ALCAM promoter therefore increasing its expression in macrophages, and the ALCAMhigh macrophages co-localize with exhausted CD8+ T cells in the tumor spatial microenvironment and promote T cell exhaustion. Preclinically, HIF-1ɑ inhibition reduces ALCAM expression in macrophages and exhausted CD8+ T cells and potentiates T cell antitumor function to enhance immunotherapy efficacy. This study reveals the systematic landscape of hypoxia at single-cell resolution and spatial architecture and highlights the effect of hypoxia on immunotherapy resistance through the ALCAMhigh macrophage-exhausted T cell axis, providing a novel immunotherapeutic strategy to overcome hypoxia-induced resistance in cancers.
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Affiliation(s)
- Zhenzhen Xun
- Center for Immune‐Related Diseases at Shanghai Institute of ImmunologyDepartment of GastroenterologyRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China
- Shanghai Institute of ImmunologyState Key Laboratory of Systems Medicine for CancerDepartment of Immunology and MicrobiologyShanghai Jiao Tong University School of MedicineShanghai200025China
| | - Huanran Zhou
- Department of EndocrinologyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui230001China
| | - Mingyi Shen
- Center for Immune‐Related Diseases at Shanghai Institute of ImmunologyDepartment of GastroenterologyRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China
- Shanghai Institute of ImmunologyState Key Laboratory of Systems Medicine for CancerDepartment of Immunology and MicrobiologyShanghai Jiao Tong University School of MedicineShanghai200025China
| | - Yao Liu
- Department of Hepatobiliary SurgeryCentre for Leading Medicine and Advanced Technologies of IHMThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230001China
| | - Chengcao Sun
- Department of Molecular and Cellular OncologyThe University of Texas MD Anderson Cancer CenterHoustonTX77030USA
| | - Yanhua Du
- Center for Immune‐Related Diseases at Shanghai Institute of ImmunologyDepartment of GastroenterologyRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China
| | - Zhou Jiang
- Department of Molecular and Cellular OncologyThe University of Texas MD Anderson Cancer CenterHoustonTX77030USA
| | - Liuqing Yang
- Department of Molecular and Cellular OncologyThe University of Texas MD Anderson Cancer CenterHoustonTX77030USA
| | - Qing Zhang
- Simmons Comprehensive Cancer CenterDepartment of PathologyUniversity of Texas Southwestern Medical CenterDallasTX75390USA
| | - Chunru Lin
- Department of Molecular and Cellular OncologyThe University of Texas MD Anderson Cancer CenterHoustonTX77030USA
| | - Qingsong Hu
- Department of Hepatobiliary SurgeryCentre for Leading Medicine and Advanced Technologies of IHMThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230001China
| | - Youqiong Ye
- Center for Immune‐Related Diseases at Shanghai Institute of ImmunologyDepartment of GastroenterologyRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China
- Shanghai Institute of ImmunologyState Key Laboratory of Systems Medicine for CancerDepartment of Immunology and MicrobiologyShanghai Jiao Tong University School of MedicineShanghai200025China
| | - Leng Han
- Brown Center for ImmunotherapySchool of MedicineIndiana UniversityIndianapolisIN46202USA
- Department of Biostatistics and Health Data ScienceSchool of MedicineIndiana UniversityIndianapolisIN46202USA
- Department of Biochemistry and Molecular BiologyMcGovern Medical School at The University of Texas Health Science Center at HoustonHoustonTX77030USA
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Khalil NN, Rexius-Hall ML, Escopete S, Parker SJ, McCain ML. Distinct phenotypes induced by acute hypoxia and TGF-β1 in human adult cardiac fibroblasts. JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY PLUS 2024; 9:100080. [PMID: 39329164 PMCID: PMC11423773 DOI: 10.1016/j.jmccpl.2024.100080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
Myocardial infarction (MI) causes hypoxic injury to downstream myocardial tissue, which initiates a wound healing response that replaces injured myocardial tissue with a scar. Wound healing is a complex process that consists of multiple phases, in which many different stimuli induce cardiac fibroblasts to differentiate into myofibroblasts and deposit new matrix. While this process is necessary to replace necrotic tissue, excessive and unresolved fibrosis is common post-MI and correlated with heart failure. Therefore, defining how cardiac fibroblast phenotypes are distinctly regulated by stimuli that are prevalent in the post-MI microenvironment, such as hypoxia and transforming growth factor-beta (TGF-β), is essential for understanding and ultimately mitigating pathological fibrosis. In this study, we acutely treated primary human adult cardiac fibroblasts with TGF-β1 or hypoxia and then characterized their phenotype through immunofluorescence, quantitative RT-PCR, and proteomic analysis. We found that fibroblasts responded to low oxygen with increased localization of hypoxia inducible factor 1 (HIF-1) to the nuclei after 4h, which was followed by increased gene expression of vascular endothelial growth factor A (VEGFA), a known target of HIF-1, by 24h. Both TGF-β1 and hypoxia inhibited proliferation after 24h. TGF-β1 treatment also upregulated various fibrotic pathways. In contrast, hypoxia caused a reduction in several protein synthesis pathways, including collagen biosynthesis. Collectively, these data suggest that TGF-β1, but not acute hypoxia, robustly induces the differentiation of human cardiac fibroblasts into myofibroblasts. Discerning the overlapping and distinctive outcomes of TGF-β1 and hypoxia treatment is important for elucidating their roles in fibrotic remodeling post-MI and provides insight into potential therapeutic targets.
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Affiliation(s)
- Natalie N. Khalil
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
| | - Megan L. Rexius-Hall
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
| | - Sean Escopete
- Department of Cardiology and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Sarah J. Parker
- Department of Cardiology and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Megan L. McCain
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of USC, Los Angeles, CA, 90033, USA
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Villareal LB, Falcon DM, Xie L, Xue X. Hypoxia-inducible factor 3α1 increases epithelial-to-mesenchymal transition and iron uptake to drive colorectal cancer liver metastasis. Br J Cancer 2024; 130:1904-1915. [PMID: 38693428 PMCID: PMC11183190 DOI: 10.1038/s41416-024-02699-3] [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: 05/30/2023] [Revised: 04/14/2024] [Accepted: 04/16/2024] [Indexed: 05/03/2024] Open
Abstract
BACKGROUND/OBJECTIVES Hypoxia-inducible factor (HIF)-3α1's role in colorectal cancer (CRC) cells, especially its effects on epithelial-mesenchymal transition (EMT), zinc finger E-box binding homeobox 2 (ZEB2) gene expression, and iron metabolism, remains largely unstudied. This research sought to elucidate these relationships. METHODS RNA-seq was conducted to investigate the impact of HIF-3α1 overexpression in CRC cells. Dual-luciferase reporter assays assessed the direct targeting of ZEB2 by HIF-3α1. Scratch assays measured changes in cell migration following HIF-3α1 overexpression and ZEB2 knockdown. The effects of HIF-3α1 overexpression on colon tumour growth and liver metastasis were examined in vivo. Iron chelation was used to explore the role of iron metabolism in HIF-3α1-mediated EMT and tumour growth. RESULTS HIF-3α1 overexpression induced EMT and upregulated ZEB2 expression, enhancing cancer cell migration. ZEB2 knockdown reduced mesenchymal markers and cell migration. HIF-3α1 promoted colon tumour growth and liver metastasis, increased transferrin receptor (TFRC) expression and cellular iron levels, and downregulated HIF-1α, HIF-2α, and NDRG1. Iron chelation mitigated HIF-3α1-mediated EMT, tumour growth, and survival. CONCLUSIONS HIF-3α1 plays a critical role in colon cancer progression by promoting EMT, iron accumulation, and metastasis through ZEB2 and TFRC regulation, suggesting potential therapeutic targets in CRC.
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Affiliation(s)
- Luke B Villareal
- Department of Biochemistry and Molecular Biology, University of New Mexico, Albuquerque, NM, USA
| | - Daniel M Falcon
- Department of Biochemistry and Molecular Biology, University of New Mexico, Albuquerque, NM, USA
| | - Liwei Xie
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xiang Xue
- Department of Biochemistry and Molecular Biology, University of New Mexico, Albuquerque, NM, USA.
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5
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Li C, Lv J, Wumaier G, Zhao Y, Dong L, Zeng Y, Zhu N, Zhang X, Wang J, Xia J, Li S. NDRG1 promotes endothelial dysfunction and hypoxia-induced pulmonary hypertension by targeting TAF15. PRECISION CLINICAL MEDICINE 2023; 6:pbad024. [PMID: 37885911 PMCID: PMC10599394 DOI: 10.1093/pcmedi/pbad024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/26/2023] [Accepted: 10/07/2023] [Indexed: 10/28/2023] Open
Abstract
Background Pulmonary hypertension (PH) represents a threatening pathophysiologic state that can be induced by chronic hypoxia and is characterized by extensive vascular remodeling. However, the mechanism underlying hypoxia-induced vascular remodeling is not fully elucidated. Methods and Results By using quantitative polymerase chain reactions, western blotting, and immunohistochemistry, we demonstrate that the expression of N-myc downstream regulated gene-1 (NDRG1) is markedly increased in hypoxia-stimulated endothelial cells in a time-dependent manner as well as in human and rat endothelium lesions. To determine the role of NDRG1 in endothelial dysfunction, we performed loss-of-function studies using NDRG1 short hairpin RNAs and NDRG1 over-expression plasmids. In vitro, silencing NDRG1 attenuated proliferation, migration, and tube formation of human pulmonary artery endothelial cells (HPAECs) under hypoxia, while NDRG1 over-expression promoted these behaviors of HPAECs. Mechanistically, NDRG1 can directly interact with TATA-box binding protein associated factor 15 (TAF15) and promote its nuclear localization. Knockdown of TAF15 abrogated the effect of NDRG1 on the proliferation, migration and tube formation capacity of HPAECs. Bioinformatics studies found that TAF15 was involved in regulating PI3K-Akt, p53, and hypoxia-inducible factor 1 (HIF-1) signaling pathways, which have been proved to be PH-related pathways. In addition, vascular remodeling and right ventricular hypertrophy induced by hypoxia were markedly alleviated in NDRG1 knock-down rats compared with their wild-type littermates. Conclusions Taken together, our results indicate that hypoxia-induced upregulation of NDRG1 contributes to endothelial dysfunction through targeting TAF15, which ultimately contributes to the development of hypoxia-induced PH.
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Affiliation(s)
- Chengwei Li
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Junzhu Lv
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Gulinuer Wumaier
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yu Zhao
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Liang Dong
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yuzhen Zeng
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Ning Zhu
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xiujuan Zhang
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Jing Wang
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Jingwen Xia
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Shengqing Li
- Department of Pulmonary and Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
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Kojima T, Nakamura T, Saito J, Hidaka Y, Akimoto T, Inoue H, Chick CN, Usuki T, Kaneko M, Miyagi E, Ishikawa Y, Yokoyama U. Hydrostatic pressure under hypoxia facilitates fabrication of tissue-engineered vascular grafts derived from human vascular smooth muscle cells in vitro. Acta Biomater 2023; 171:209-222. [PMID: 37793599 DOI: 10.1016/j.actbio.2023.09.041] [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: 05/16/2023] [Revised: 09/15/2023] [Accepted: 09/25/2023] [Indexed: 10/06/2023]
Abstract
Biologically compatible vascular grafts are urgently required. The scaffoldless multi-layered vascular wall is considered to offer theoretical advantages, such as facilitating cells to form cell-cell and cell-matrix junctions and natural extracellular matrix networks. Simple methods are desired for fabricating physiological scaffoldless tissue-engineered vascular grafts. Here, we showed that periodic hydrostatic pressurization under hypoxia (HP/HYP) facilitated the fabrication of multi-layered tunica media entirely from human vascular smooth muscle cells. Compared with normoxic atmospheric pressure, HP/HYP increased expression of N-myc downstream-regulated 1 (NDRG1) and the collagen-cross-linking enzyme lysyl oxidase in human umbilical artery smooth muscle cells. HP/HYP increased N-cadherin-mediated cell-cell adhesion via NDRG1, cell-matrix interaction (i.e., clustering of integrin α5β1 and fibronectin), and collagen fibrils. We then fabricated vascular grafts using HP/HYP during repeated cell seeding and obtained 10-layered smooth muscle grafts with tensile rupture strength of 0.218-0.396 MPa within 5 weeks. Implanted grafts into the rat aorta were endothelialized after 1 week and patent after 5 months, at which time most implanted cells had been replaced by recipient-derived cells. These results suggest that HP/HYP enables fabrication of scaffoldless human vascular mimetics that have a spatial arrangement of cells and matrices, providing potential clinical applications for cardiovascular diseases. STATEMENT OF SIGNIFICANCE: Tissue-engineered vascular grafts (TEVGs) are theoretically more biocompatible than prosthetic materials in terms of mechanical properties and recipient cell-mediated tissue reconstruction. Although some promising results have been shown, TEVG fabrication processes are complex, and the ideal method is still desired. We focused on the environment in which the vessels develop in utero and found that mechanical loading combined with hypoxia facilitated formation of cell-cell and cell-matrix junctions and natural extracellular matrix networks in vitro, which resulted in the fabrication of multi-layered tunica media entirely from human umbilical artery smooth muscle cells. These scaffoldless TEVGs, produced using a simple process, were implantable and have potential clinical applications for cardiovascular diseases.
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Affiliation(s)
- Tomoyuki Kojima
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan; Department of Obstetrics and Gynecology, Yokohama City University Graduate School of Medicine, Kanagawa 236-0004, Japan
| | - Takashi Nakamura
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan
| | - Junichi Saito
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan
| | - Yuko Hidaka
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan
| | - Taisuke Akimoto
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Kanagawa 236-0004, Japan
| | - Hana Inoue
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan
| | - Christian Nanga Chick
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Toyonobu Usuki
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Makoto Kaneko
- Graduate School of Science and Engineering, Meijo University, Aichi 468-8502, Japan
| | - Etsuko Miyagi
- Department of Obstetrics and Gynecology, Yokohama City University Graduate School of Medicine, Kanagawa 236-0004, Japan
| | - Yoshihiro Ishikawa
- Cardiovascular Research Institute, Yokohama City University Graduate School of Medicine, Kanagawa 236-0004, Japan
| | - Utako Yokoyama
- Department of Physiology, Tokyo Medical University, Tokyo 160-0023, Japan.
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7
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Ghafouri-Fard S, Ahmadi Teshnizi S, Hussen BM, Taheri M, Sharifi G. A review on the role of NDRG1 in different cancers. Mol Biol Rep 2023; 50:6251-6264. [PMID: 37249826 PMCID: PMC10290039 DOI: 10.1007/s11033-023-08540-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 05/19/2023] [Indexed: 05/31/2023]
Abstract
NDRG1 is a member of the α/β hydrolase superfamily that resides in the cytoplasm and participates in the stress responses, hormone response, cell growth, and differentiation. Several studies have pointed to the importance of NDRG1 in the carcinogenesis. This gene has been found to be up-regulated in an array of cancer types such as bladder, esophageal squamous cell carcinoma, endometrial, lung and liver cancers, but being down-regulated in other types of cancers such as colorectal, gastric and ovarian cancers. The current study summarizes the evidence on the role of NDRG1 in the carcinogenic processes in different types of tissues.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Sara Ahmadi Teshnizi
- Phytochemistry Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Bashdar Mahmud Hussen
- Department of Clinical Analysis, College of Pharmacy, Hawler Medical University, Kurdistan Region, Erbil, Iraq
| | - Mohammad Taheri
- Institute of Human Genetics, Jena University Hospital, Jena, Germany.
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran.
| | - Guive Sharifi
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Science, Tehran, Iran.
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8
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Zhao X, Richardson DR. The role of the NDRG1 in the pathogenesis and treatment of breast cancer. Biochim Biophys Acta Rev Cancer 2023; 1878:188871. [PMID: 36841367 DOI: 10.1016/j.bbcan.2023.188871] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/18/2023] [Accepted: 02/19/2023] [Indexed: 02/26/2023]
Abstract
Breast cancer (BC) is the leading cause of cancer death in women. This disease is heterogeneous, with clinical subtypes being estrogen receptor-α (ER-α) positive, having human epidermal growth factor receptor 2 (HER2) overexpression, or being triple-negative for ER-α, progesterone receptor, and HER2 (TNBC). The ER-α positive and HER2 overexpressing tumors can be treated with agents targeting these proteins, including tamoxifen and pertuzumab, respectively. Despite these treatments, resistance and metastasis are problematic, while TNBC is challenging to treat due to the lack of suitable targets. Many studies examining BC and other tumors indicate a role for N-myc downstream-regulated gene-1 (NDRG1) as a metastasis suppressor. The ability of NDRG1 to inhibit metastasis is due, in part, to the inhibition of the initial step in metastasis, namely the epithelial-to-mesenchymal transition. Paradoxically, there are also reports of NDRG1 playing a pro-oncogenic role in BC pathogenesis. The oncogenic effects of NDRG1 in BC have been reported to relate to lipid metabolism or the mTOR signaling pathway. The molecular mechanism(s) of how NDRG1 regulates the activity of multiple signaling pathways remains unclear. Therapeutic strategies that up-regulate NDRG1 have been developed and include agents of the di-2-pyridylketone thiosemicarbazone class. These compounds target oncogenic drivers in BC cells, suppressing the expression of multiple key hormone receptors including ER-α, progesterone receptor, androgen receptor, and prolactin receptor, and can also overcome tamoxifen resistance. Considering the varying role of NDRG1 in BC pathogenesis, further studies are required to examine what subset of BC patients would benefit from pharmacopeia that up-regulate NDRG1.
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Affiliation(s)
- Xiao Zhao
- Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland 4111, Australia
| | - Des R Richardson
- Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland 4111, Australia; Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan.
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NDRG1 in Cancer: A Suppressor, Promoter, or Both? Cancers (Basel) 2022; 14:cancers14235739. [PMID: 36497221 PMCID: PMC9737586 DOI: 10.3390/cancers14235739] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/21/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
N-myc downregulated gene-1 (NDRG1) has been variably reported as a metastasis suppressor, a biomarker of poor outcome, and a facilitator of disease progression in a range of different cancers. NDRG1 is poorly understood in cancer due to its context-dependent and pleiotropic functions. Within breast cancer, NDRG1 is reported to be either a facilitator of, or an inhibitor of tumour progression and metastasis. The wide array of roles played by NDRG1 are dependent on post-translational modifications and subcellular localization, as well as the cellular context, for example, cancer type. We present an update on NDRG1, and its association with hallmarks of cancer such as hypoxia, its interaction with oncogenic proteins such as p53 as well its role in oncogenic and metastasis pathways in breast and other cancers. We further comment on its functional implications as a metastasis suppressor and promoter, its clinical relevance, and discuss its therapeutic targetability in different cancers.
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10
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Regulatory mechanisms and function of hypoxia-induced long noncoding RNA NDRG1-OT1 in breast cancer cells. Cell Death Dis 2022; 13:807. [PMID: 36127332 PMCID: PMC9489765 DOI: 10.1038/s41419-022-05253-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 09/06/2022] [Accepted: 09/09/2022] [Indexed: 01/23/2023]
Abstract
Hypoxia is a classic feature of the tumor microenvironment that has profound effects on cancer progression and is tightly associated with poor prognosis. Long noncoding RNAs (lncRNAs), a component of the noncoding genome, have been increasingly investigated due to their diverse roles in tumorigenesis. Previously, a hypoxia-induced lncRNA, NDRG1-OT1, was identified in MCF-7 breast cancer cells using next-generation sequencing. However, the regulatory mechanisms of NDRG1-OT1 remain elusive. Therefore, the purpose of this study was to investigate the regulatory mechanisms and functional roles of NDRG1-OT1 in breast cancer cells. Expression profiling of NDRG1-OT1 revealed that it was upregulated under hypoxia in different breast cancer cells. Overexpression and knockdown of HIF-1α up- and downregulated NDRG1-OT1, respectively. Luciferase reporter assays and chromatin immunoprecipitation assays validated that HIF-1α transcriptionally activated NDRG1-OT1 by binding to its promoter (-1773 to -1769 and -647 to -643 bp). Next, to investigate whether NDRG1-OT1 could function as a miRNA sponge, results of in silico analysis, expression profiling of predicted miRNAs, and RNA immunoprecipitation assays indicated that NDRG1-OT1 could act as a miRNA sponge of miR-875-3p. In vitro and in vivo functional assays showed that NDRG1-OT1 could promote tumor growth and migration. Lastly, a small peptide (66 a.a.) translated from NDRG1-OT1 was identified. In summary, our findings revealed novel regulatory mechanisms of NDRG1-OT1 by HIF-1α and upon miR-875-3p. Also, NDRG1-OT1 promoted the malignancy of breast cancer cells and encoded a small peptide.
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11
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Beniamino Y, Cenni V, Piccioli M, Ciurli S, Zambelli B. The Ni(II)-Binding Activity of the Intrinsically Disordered Region of Human NDRG1, a Protein Involved in Cancer Development. Biomolecules 2022; 12:1272. [PMID: 36139110 PMCID: PMC9496542 DOI: 10.3390/biom12091272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
Nickel exposure is associated with tumors of the respiratory tract such as lung and nasal cancers, acting through still-uncharacterized mechanisms. Understanding the molecular basis of nickel-induced carcinogenesis requires unraveling the mode and the effects of Ni(II) binding to its intracellular targets. A possible Ni(II)-binding protein and a potential focus for cancer treatment is hNDRG1, a protein induced by Ni(II) through the hypoxia response pathway, whose expression correlates with higher cancer aggressiveness and resistance to chemotherapy in lung tissue. The protein sequence contains a unique C-terminal sequence of 83 residues (hNDRG1*C), featuring a three-times-repeated decapeptide, involved in metal binding, lipid interaction and post-translational phosphorylation. In the present work, the biochemical and biophysical characterization of unmodified hNDRG1*C was performed. Bioinformatic analysis assigned it to the family of the intrinsically disordered regions and the absence of secondary and tertiary structure was experimentally proven by circular dichroism and NMR. Isothermal titration calorimetry revealed the occurrence of a Ni(II)-binding event with micromolar affinity. Detailed information on the Ni(II)-binding site and on the residues involved was obtained in an extensive NMR study, revealing an octahedral paramagnetic metal coordination that does not cause any major change of the protein backbone, which is coherent with CD analysis. hNDRG1*C was found in a monomeric form by light-scattering experiments, while the full-length hNDRG1 monomer was found in equilibrium between the dimer and tetramer, both in solution and in human cell lines. The results are the first essential step for understanding the cellular function of hNDRG1*C at the molecular level, with potential future applications to clarify its role and the role of Ni(II) in cancer development.
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Affiliation(s)
- Ylenia Beniamino
- Laboratory of Bioinorganic Chemistry, Department of Pharmacy and Biotechnology, University of Bologna, Viale Giuseppe Fanin 40, 40127 Bologna, Italy
| | - Vittoria Cenni
- CNR Institute of Molecular Genetics “Luigi-Luca Cavalli-Sforza” Unit of Bologna, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Mario Piccioli
- Department of Chemistry, Center for Magnetic Resonance, University of Florence, 50121 Florence, Italy
| | - Stefano Ciurli
- Laboratory of Bioinorganic Chemistry, Department of Pharmacy and Biotechnology, University of Bologna, Viale Giuseppe Fanin 40, 40127 Bologna, Italy
| | - Barbara Zambelli
- Laboratory of Bioinorganic Chemistry, Department of Pharmacy and Biotechnology, University of Bologna, Viale Giuseppe Fanin 40, 40127 Bologna, Italy
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12
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Zhao C, Ren Y, Zhang Y. NDRG4 Alleviates Myocardial Infarction-Induced Apoptosis through the JAK2/STAT3 Pathway. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:4869470. [PMID: 35126626 PMCID: PMC8814718 DOI: 10.1155/2022/4869470] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/13/2021] [Accepted: 12/20/2021] [Indexed: 01/18/2023]
Abstract
OBJECTIVE At present, studies have confirmed that NDRG4 is specifically expressed in the heart, while its effect on the heart is still unclear. This study is to explore the effect of NDRG4 on cardiomyocyte apoptosis caused by acute myocardial infarction (AMI). METHODS Twenty SD rats were randomly divided into Sham (left anterior descent of heart without ligation) and AMI groups. In this study, coronary artery ligation was used to establish an AMI model, and the AMI model was verified by auxiliary examination and pathological examination. Besides, quantitative real-time polymerase chain reaction (qRT-PCR) and Western blotting (WB) was used to detect the expression level of Bax and Bcl-2 in heart tissues, and NDRG mRNA levels in tissues were also detected. qRT-PCR technology was used to verify the transfection efficiency of NDRG4 in H9C2 cells, and the change of apoptosis level of H9C2 cells was detected by Cell Counting Kit-8 (CCK-8) assay and TUNEL staining; besides, the expression level of apoptosis-related factors was detected by WB and qRT-PCR technology. Simultaneously with the modeling of rats, we injected adenovirus (Ad) into the heart tissue and examined the structural and functional changes of the rat heart. Then, WB technology was used to detect the expression level of the JAK2/STAT3 signaling pathway. RESULTS The heart function and heart structure of rats in the MI group were dramatically worse, and the expression level of NDRG4 was also dramatically reduced. The overexpression of NDRG4 in H9C2 cells can effectively inhibit the ischemia/hypoxia- (I/H-) induced decrease in cell viability and increase in apoptosis rate and inhibit the increase in Bax/Bcl-2 ratio. Moreover, overexpression of NDRG4 in heart tissue can effectively improve the cardiac function and structural destruction caused by MI. In addition, NDRG4 can inhibit JAK2/STAT3 pathway activation. CONCLUSION The expression of NDRG4 in the MI tissue of rats was suppressed, while overexpression of NDRG4 by injection of Ad can obviously protect the rat heart. Furthermore, overexpression of NDRG4 in H9C2 cells can effectively inhibit the I/H-induced decrease in cell viability and increase in apoptosis rate, and this may be related to the inhibition of the JAK2/STAT3 signaling pathway.
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Affiliation(s)
- Changliang Zhao
- Department of Cardiology 4, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161000 Heilongjiang, China
| | - Yuanyuan Ren
- Department of Cardiology 4, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161000 Heilongjiang, China
| | - Yachao Zhang
- Intensive Care Unit, Hospital of Traditional Chinese Medicine of Qiqihar, Qiqihar, 161000 Heilongjiang, China
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13
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Le N, Hufford TM, Park JS, Brewster RM. Differential expression and hypoxia-mediated regulation of the N-myc downstream regulated gene family. FASEB J 2021; 35:e21961. [PMID: 34665878 PMCID: PMC8573611 DOI: 10.1096/fj.202100443r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/11/2021] [Accepted: 09/15/2021] [Indexed: 01/09/2023]
Abstract
Many organisms rely on oxygen to generate cellular energy (adenosine triphosphate or ATP). During severe hypoxia, the production of ATP decreases, leading to cell damage or death. Conversely, excessive oxygen causes oxidative stress that is equally damaging to cells. To mitigate pathological outcomes, organisms have evolved mechanisms to adapt to fluctuations in oxygen levels. Zebrafish embryos are remarkably hypoxia-tolerant, surviving anoxia (zero oxygen) for hours in a hypometabolic, energy-conserving state. To begin to unravel underlying mechanisms, we analyze here the distribution of the N-myc Downstream Regulated Gene (ndrg) family, ndrg1-4, and their transcriptional response to hypoxia. These genes have been primarily studied in cancer cells and hence little is understood about their normal function and regulation. We show here using in situ hybridization that ndrgs are expressed in metabolically demanding organs of the zebrafish embryo, such as the brain, kidney, and heart. To investigate whether ndrgs are hypoxia-responsive, we exposed embryos to different durations and severity of hypoxia and analyzed transcript levels. We observed that ndrgs are differentially regulated by hypoxia and that ndrg1a has the most robust response, with a ninefold increase following prolonged anoxia. We further show that this treatment resulted in de novo expression of ndrg1a in tissues where the transcript is not observed under normoxic conditions and changes in Ndrg1a protein expression post-reoxygenation. These findings provide an entry point into understanding the role of this conserved gene family in the adaptation of normal cells to hypoxia and reoxygenation.
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Affiliation(s)
- Nguyet Le
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Timothy M. Hufford
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Jong S. Park
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Rachel M. Brewster
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
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14
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Comparison of Osteosarcoma Aggregated Tumour Models with Human Tissue by Multimodal Mass Spectrometry Imaging. Metabolites 2021; 11:metabo11080506. [PMID: 34436447 PMCID: PMC8401535 DOI: 10.3390/metabo11080506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/24/2022] Open
Abstract
Osteosarcoma (OS) is the most common primary bone malignancy and largely effects adolescents and young adults, with 60% of patients under the age of 25. There are multiple cell models of OS described in vitro that express the specific genetic alterations of the sarcoma. In the work reported here, multiple mass spectrometry imaging (MSI) modalities were employed to characterise two aggregated cellular models of OS models formed using the MG63 and SAOS-2 cell lines. Phenotyping of the metabolite activity within the two OS aggregoid models was achieved and a comparison of the metabolite data with OS human tissue samples revealed relevant fatty acid and phospholipid markers. Although, annotations of these species require MS/MS analysis for confident identification of the metabolites. From the putative assignments however, it was suggested that the MG63 aggregoids are an aggressive tumour model that exhibited metastatic-like potential. Alternatively, the SAOS-2 aggregoids are more mature osteoblast-like phenotype that expressed characteristics of cellular differentiation and bone development. It was determined the two OS aggregoid models shared similarities of metabolic behaviour with different regions of OS human tissues, specifically of the higher metastatic grade.
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15
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FOXP1 and NDRG1 act differentially as downstream effectors of RAD9-mediated prostate cancer cell functions. Cell Signal 2021; 86:110091. [PMID: 34298089 DOI: 10.1016/j.cellsig.2021.110091] [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: 03/03/2021] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 11/21/2022]
Abstract
Metastatic progression is the key feature of prostate cancer primarily responsible for mortality caused by this disease. RAD9 is an oncogene for prostate cancer, and the encoded protein enhances metastasis-related phenotypes. RAD9 is a transcription factor with a limited set of regulated target genes, but the complete list of downstream genes critical for prostate carcinogenesis is unknown. We used microarray gene expression profiling and chromatin immunoprecipitation in parallel to identify genes transcriptionally controlled by RAD9 that contribute to this cancer. We found expression of 44 genes altered in human prostate cancer DU145 cells when RAD9 is knocked down by siRNA, and all of them bind RAD9 at their genomic location. FOXP1 and NDRG1 were down regulated when RAD9 expression was reduced, and we evaluated them further. We demonstrate that reduced RAD9, FOXP1 or NDGR1 expression decreases cell proliferation, rapid migration, anchorage-independent growth, anoikis resistance, and aerobic glycolysis. Ectopic expression of FOXP1 or NDRG1 partially restored aerobic glycolysis to prostate cancer cells with reduced RAD9 abundance, but only FOXP1 significantly complemented the other deficiencies. We thus show, for the first time, that RAD9 regulates FOXP1 and NDRG1 expression, and they function differently as downstream effectors for RAD9-mediated prostate cancer cell activities.
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16
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Yang Y, Liu L, Sun J, Wang S, Yang Z, Li H, Huang N, Zhao W. Deoxypodophyllotoxin Inhibits Non-Small Cell Lung Cancer Cell Growth by Reducing HIF-1α-Mediated Glycolysis. Front Oncol 2021; 11:629543. [PMID: 33732648 PMCID: PMC7959795 DOI: 10.3389/fonc.2021.629543] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/11/2021] [Indexed: 12/24/2022] Open
Abstract
Cancer cell proliferation is a metabolically demanding process that requires high rate of glycolysis to support anabolic growth. Deoxypodophyllotoxin (DPT) is a natural flavonolignan with various pharmacological activities, including antitumor effect. However, whether DPT affects the metabolic reprogramming of cancer cells is unknown. The purpose of this study is to investigate the role of DPT on non-small cell lung cancer (NSCLC) and to explore whether HIF-1α-mediated glycolysis is involved in its mechanism of action.The level of HIF-1α mRNA and protein in NSCLC cells following DPT treatment was detected using qRT-PCR and western blotting, respectively. Cell Counting Kit-8 (CCK-8) and caspase-3 activity assays were performed to analyze cell proliferation and apoptosis. The underlying molecular mechanism was identified by dual luciferase assay, Western blotting, qRT-PCR, glucose consumption, lactate production, and immunoprecipitation. A murine NSCLC model was used to clarify the effect of DPT treatment on tumor cell proliferation. Our findings showed that DPT treatment inhibited NSCLC cell growth in a dose- and time-dependent manner. Further analysis suggested that DPT treatment inhibited HIF-1α signaling pathway by Parkin-mediated protein degradation in NSCLC cells. DPT treatment significantly decreased glucose consumption and lactate production. In addition, DPT treatment reduced the expression of HIF-1α target genes, including GLUT1, HK2 and LDHA, resulting in reduction in glycolysis. We further revealed that DPT-induced cell growth inhibition and increased glucose and lactate levels could be reversed by overexpressing HIF-1α. Additionally, we found that DPT repressed NSCLC growth and GLUT1, HK2 and LDHA expression in vivo. Overall, this study suggested that DPT inhibited NSCLC growth by preventing HIF-1α-mediated glycolysis.
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Affiliation(s)
- Yuping Yang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Lingling Liu
- School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, China.,Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, China
| | - Jinghui Sun
- School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, China
| | - Shu Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing, China
| | | | - Honghui Li
- Department of Refractive Surgery, Chengdu Aier Eye Hospital, Chengdu, China
| | - Na Huang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Wei Zhao
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China.,School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, China
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17
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Park KC, Paluncic J, Kovacevic Z, Richardson DR. Pharmacological targeting and the diverse functions of the metastasis suppressor, NDRG1, in cancer. Free Radic Biol Med 2020; 157:154-175. [PMID: 31132412 DOI: 10.1016/j.freeradbiomed.2019.05.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/24/2019] [Accepted: 05/16/2019] [Indexed: 12/18/2022]
Abstract
N-myc downstream regulated gene-1 (NDRG1) is a potent metastasis suppressor that is regulated by hypoxia, metal ions including iron, the free radical nitric oxide (NO.), and various stress stimuli. This intriguing molecule exhibits diverse functions in cancer, inhibiting epithelial-mesenchymal transition (EMT), cell migration and angiogenesis by modulation of a plethora of oncogenes via cellular signaling. Thus, pharmacological targeting of NDRG1 signaling in cancer is a promising therapeutic strategy. Of note, novel anti-tumor agents of the di-2-pyridylketone thiosemicarbazone series, which exert the "double punch" mechanism by binding metal ions to form redox-active complexes, have been demonstrated to markedly up-regulate NDRG1 expression in cancer cells. This review describes the mechanisms underlying NDRG1 modulation by the thiosemicarbazones and the diverse effects NDRG1 exerts in cancer. As a major induction mechanism, iron depletion appears critical, with NO. also inducing NDRG1 through its ability to bind iron and generate dinitrosyl-dithiol iron complexes, which are then effluxed from cells. Apart from its potent anti-metastatic role, several studies have reported a pro-oncogenic role of NDRG1 in a number of cancer-types. Hence, it has been suggested that NDRG1 plays pleiotropic roles depending on the cancer-type. The molecular mechanism(s) underlying NDRG1 pleiotropy remain elusive, but are linked to differential regulation of WNT signaling and potentially differential interaction with the tumor suppressor, PTEN. This review discusses NDRG1 induction mechanisms by metal ions and NO. and both the anti- and possible pro-oncogenic functions of NDRG1 in multiple cancer-types and compares the opposite effects this protein exerts on cancer progression.
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Affiliation(s)
- Kyung Chan Park
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Medical Foundation Building (K25), The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Jasmina Paluncic
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Medical Foundation Building (K25), The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Zaklina Kovacevic
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Medical Foundation Building (K25), The University of Sydney, Sydney, New South Wales, 2006, Australia.
| | - Des R Richardson
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Medical Foundation Building (K25), The University of Sydney, Sydney, New South Wales, 2006, Australia.
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18
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Li H, Kittur FS, Hung CY, Li PA, Ge X, Sane DC, Xie J. Quantitative Proteomics Reveals the Beneficial Effects of Low Glucose on Neuronal Cell Survival in an in vitro Ischemic Penumbral Model. Front Cell Neurosci 2020; 14:272. [PMID: 33033473 PMCID: PMC7491318 DOI: 10.3389/fncel.2020.00272] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/31/2020] [Indexed: 01/04/2023] Open
Abstract
Understanding proteomic changes in the ischemic penumbra are crucial to rescue those salvageable cells and reduce the damage of an ischemic stroke. Since the penumbra region is dynamic with heterogeneous cells/tissues, tissue sampling from animal models of stroke for the molecular study is a challenge. In this study, cultured hippocampal HT22 cells under hypoxia treatment for 17.5 h with 0.69 mM low glucose (H+LG) could mimic ischemic penumbral cells since they had much higher cell viability and viable cell number compared to hypoxia without glucose (H-G) treatment. To validate established cell-based ischemic penumbral model and understand the beneficial effects of low glucose (LG), quantitative proteomics analysis was performed on H+LG, H-G, and normoxia with normal 22 mM glucose (N+G) treated cells. We identified 427 differentially abundant proteins (DAPs) between H-G and N+G and further identified 105 DAPs between H+LG and H-G. Analysis of 105 DAPs revealed that LG promotes cell survival by activating HIF1α to enhance glycolysis; preventing the dysregulations of extracellular matrix remodeling, cell cycle and division, and antioxidant and detoxification; as well as attenuating inflammatory reaction response, protein synthesis and neurotransmission activity. Our results demonstrated that this established cell-based system could mimic penumbral conditions and can be used for molecular studies.
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Affiliation(s)
- Hua Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States
| | - Farooqahmed S Kittur
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States
| | - Chiu-Yueh Hung
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States
| | - Xinghong Ge
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States.,Department of Dermatology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - David C Sane
- Carilion Clinic, Virginia Tech Carilion School of Medicine, Roanoke, VA, United States
| | - Jiahua Xie
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC, United States
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19
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Effect of Hypoxia on Gene Expression in Cell Populations Involved in Wound Healing. BIOMED RESEARCH INTERNATIONAL 2019; 2019:2626374. [PMID: 31534956 PMCID: PMC6724439 DOI: 10.1155/2019/2626374] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/28/2019] [Accepted: 07/25/2019] [Indexed: 01/27/2023]
Abstract
Wound healing is a complex process regulated by multiple signals and consisting of several phases known as haemostasis, inflammation, proliferation, and remodelling. Keratinocytes, endothelial cells, macrophages, and fibroblasts are the major cell populations involved in wound healing process. Hypoxia plays a critical role in this process since cells sense and respond to hypoxic conditions by changing gene expression. This study assessed the in vitro expression of 77 genes involved in angiogenesis, metabolism, cell growth, proliferation and apoptosis in human keratinocytes (HaCaT), microvascular endothelial cells (HMEC-1), differentiated macrophages (THP-1), and dermal fibroblasts (HDF). Results indicated that the gene expression profiles induced by hypoxia were cell-type specific. In HMEC-1 and differentiated THP-1, most of the genes modulated by hypoxia encode proteins involved in angiogenesis or belonging to cytokines and growth factors. In HaCaT and HDF, hypoxia mainly affected the expression of genes encoding proteins involved in cell metabolism. This work can help to enlarge the current knowledge about the mechanisms through which a hypoxic environment influences wound healing processes at the molecular level.
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20
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Hettiarachchi GK, Katneni UK, Hunt RC, Kames JM, Athey JC, Bar H, Sauna ZE, McGill JR, Ibla JC, Kimchi-Sarfaty C. Translational and transcriptional responses in human primary hepatocytes under hypoxia. Am J Physiol Gastrointest Liver Physiol 2019; 316:G720-G734. [PMID: 30920299 PMCID: PMC6620582 DOI: 10.1152/ajpgi.00331.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The liver is the primary source of a large number of plasma proteins and plays a critical role in multiple biological processes. Inadequate oxygen supply characterizing various clinical settings such as liver transplantation exposes the liver to hypoxic conditions. Studies assessing hypoxia-induced global translational changes in liver are lacking. Here, we employed a recently developed ribosome-profiling technique to assess global translational responses of human primary hepatocytes exposed to acute hypoxic stress (1% O2) for the short term. In parallel, transcriptome profiling was performed to assess mRNA expression changes. We found that translational responses appeared earlier and were predominant over transcriptional responses. A significant decrease in translational efficiency of several ribosome genes indicated translational inhibition of new ribosome protein synthesis in hypoxia. Pathway enrichment analysis highlighted altered translational regulation of MAPK signaling, drug metabolism, oxidative phosphorylation, and nonalcoholic fatty liver disease pathways. Gene Ontology enrichment analysis revealed terms related to translation, metabolism, angiogenesis, apoptosis, and response to stress. Transcriptional induction of genes encoding heat shock proteins was observed within 30 min of hypoxia. Induction of genes encoding stress response mediators, metabolism regulators, and proangiogenic proteins was observed at 240 min. Despite the liver being the primary source of coagulation proteins and the implicated role of hypoxia in thrombosis, limited differences were observed in genes encoding coagulation-associated proteins. Overall, our study demonstrates the predominance of translational regulation over transcription and highlights differentially regulated pathways or biological processes in short-term hypoxic stress responses of human primary hepatocytes. NEW & NOTEWORTHY The novelty of this study lies in applying parallel ribosome- and transcriptome-profiling analyses to human primary hepatocytes in hypoxia. To our knowledge, this is the first study to assess global translational responses using ribosome profiling in hypoxic hepatocytes. Our results demonstrate the predominance of translational responses over transcriptional responses in early hepatic hypoxic stress responses. Furthermore, our study reveals multiple pathways and specific genes showing altered regulation in hypoxic hepatocytes.
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Affiliation(s)
- Gaya K. Hettiarachchi
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Upendra K. Katneni
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Ryan C. Hunt
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Jacob M. Kames
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - John C. Athey
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Haim Bar
- 2Department of Statistics, University of Connecticut, Storrs, Connecticut
| | - Zuben E. Sauna
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Joseph R. McGill
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
| | - Juan C. Ibla
- 3Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Chava Kimchi-Sarfaty
- 1Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland
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21
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Yeh CC, Luo JL, Nhut Phan N, Cheng YC, Chow LP, Tsai MH, Chuang EY, Lai LC. Different effects of long noncoding RNA NDRG1-OT1 fragments on NDRG1 transcription in breast cancer cells under hypoxia. RNA Biol 2018; 15:1487-1498. [PMID: 30497328 DOI: 10.1080/15476286.2018.1553480] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Hypoxia plays a crucial role in the aggressiveness of solid tumors by driving multiple signaling pathways. Recently, long non-coding RNA (lncRNA) has been reported to promote or inhibit tumor aggressiveness by regulating gene expression. Previous studies in our laboratory found that the lncRNA NDRG1-OT1 is significantly up-regulated under hypoxia and inhibits its target gene NDRG1 at both the mRNA and protein levels. At the protein level, NDRG1-OT1 increases NDRG1 degradation via ubiquitin-mediated proteolysis. However, the repressive mechanism of NDRG1 at the RNA level is still unknown. Therefore, the purpose of this study was to study how NDRG1-OT1 transcriptionally regulates its target gene NDRG1. Luciferase reporter assays showed that NDRG1-OT1 decreased NDRG1 promoter activities. Mass spectrometry, bioinformatics tools, genetic manipulation, and immunoblotting were used to identify the interacting proteins. Surprisingly, different fragments of NDRG1-OT1 had opposite effects on NDRG1. The first quarter fragment (1-149 nt) of NDRG1-OT1 had no effect on the NDRG1 promoter; the second quarter fragment (150-263 nt) repressed NDRG1 by increasing the binding affinity of HNRNPA1; the third quarter fragment (264-392 nt) improved NDRG1 promoter activity by recruiting HIF-1α; the fourth quarter fragment (393-508 nt) down-regulated NDRG1 promoter activity via down-regulation of KHSRP under hypoxia. In summary, we have found a novel mechanism by which different fragments of the same lncRNA can cause opposite effects within the same target gene.
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Affiliation(s)
- Ching-Ching Yeh
- a Graduate Institute of Physiology, College of Medicine , National Taiwan University , Taipei , Taiwan
| | - Jun-Liang Luo
- a Graduate Institute of Physiology, College of Medicine , National Taiwan University , Taipei , Taiwan
| | - Nam Nhut Phan
- b Bioinformatics Program, Taiwan International Graduate Program, Institute of Information Science , Academia Sinica , Taipei , Taiwan.,c Graduate Institute of Biomedical Electronics and Bioinformatics , National Taiwan University , Taipei , Taiwan
| | - Yi-Chun Cheng
- a Graduate Institute of Physiology, College of Medicine , National Taiwan University , Taipei , Taiwan
| | - Lu-Ping Chow
- d Graduate Institute of Biochemistry and Molecular Biology, College of Medicine , National Taiwan University , Taipei , Taiwan
| | - Mong-Hsun Tsai
- e Institute of Biotechnology , National Taiwan University , Taipei , Taiwan.,f Bioinformatics and Biostatistics Core, Center of Genomic and Precision Medicine , National Taiwan University , Taipei , Taiwan
| | - Eric Y Chuang
- c Graduate Institute of Biomedical Electronics and Bioinformatics , National Taiwan University , Taipei , Taiwan.,f Bioinformatics and Biostatistics Core, Center of Genomic and Precision Medicine , National Taiwan University , Taipei , Taiwan
| | - Liang-Chuan Lai
- a Graduate Institute of Physiology, College of Medicine , National Taiwan University , Taipei , Taiwan.,f Bioinformatics and Biostatistics Core, Center of Genomic and Precision Medicine , National Taiwan University , Taipei , Taiwan
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22
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Potential role of the N-MYC downstream-regulated gene family in reprogramming cancer metabolism under hypoxia. Oncotarget 2018; 7:57442-57451. [PMID: 27447861 PMCID: PMC5303000 DOI: 10.18632/oncotarget.10684] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 06/13/2016] [Indexed: 12/19/2022] Open
Abstract
Metabolic reprogramming toward aerobic glycolysis and lactate fermentation supplies cancer cells with intermediate metabolites, which are used as macromolecule precursors. The oncogene MYC contributes to such aerobic metabolism by activating the expression of numerous genes essential for glycolysis and mitochondrial biogenesis. However, to survive and evolve in a hypoxic tumor milieu, cancer cells must revise MYC-driven metabolism because the mitochondrial respiratory chain provides free electrons to generate oxygen free radicals with inefficient production of ATP due to oxygen depletion. Instead, hypoxia-inducible transcription factor hypoxia-inducible factor 1 (HIF-1) takes over the role of MYC in glycolysis, but suppresses mitochondrial biogenesis and activity to protect cells from such threats. Recently, the N-MYC downstream-regulated gene (NDRG) family has received attention as potential biomarkers of cancer prognosis. NDRGs are repressed MYC-dependently in various cancers, but induced under hypoxia because HIF-1 directly activates their promoters and indirectly de-represses them by antagonizing MYC. In this review, we summarize the current understanding of the reprogramming of cancer metabolism via the counterbalance between MYC and HIF-1, and discuss the proven and putative roles of the NDRG family in adjusting cancer metabolism according to the ambient oxygen level.
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23
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Labrecque MP, Takhar MK, Nason R, Santacruz S, Tam KJ, Massah S, Haegert A, Bell RH, Altamirano-Dimas M, Collins CC, Lee FJS, Prefontaine GG, Cox ME, Beischlag TV. The retinoblastoma protein regulates hypoxia-inducible genetic programs, tumor cell invasiveness and neuroendocrine differentiation in prostate cancer cells. Oncotarget 2018; 7:24284-302. [PMID: 27015368 PMCID: PMC5029701 DOI: 10.18632/oncotarget.8301] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 03/04/2016] [Indexed: 12/14/2022] Open
Abstract
Loss of tumor suppressor proteins, such as the retinoblastoma protein (Rb), results in tumor progression and metastasis. Metastasis is facilitated by low oxygen availability within the tumor that is detected by hypoxia inducible factors (HIFs). The HIF1 complex, HIF1α and dimerization partner the aryl hydrocarbon receptor nuclear translocator (ARNT), is the master regulator of the hypoxic response. Previously, we demonstrated that Rb represses the transcriptional response to hypoxia by virtue of its association with HIF1. In this report, we further characterized the role Rb plays in mediating hypoxia-regulated genetic programs by stably ablating Rb expression with retrovirally-introduced short hairpin RNA in LNCaP and 22Rv1 human prostate cancer cells. DNA microarray analysis revealed that loss of Rb in conjunction with hypoxia leads to aberrant expression of hypoxia-regulated genetic programs that increase cell invasion and promote neuroendocrine differentiation. For the first time, we have established a direct link between hypoxic tumor environments, Rb inactivation and progression to late stage metastatic neuroendocrine prostate cancer. Understanding the molecular pathways responsible for progression of benign prostate tumors to metastasized and lethal forms will aid in the development of more effective prostate cancer therapies.
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Affiliation(s)
- Mark P Labrecque
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Mandeep K Takhar
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Rebecca Nason
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Stephanie Santacruz
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Kevin J Tam
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada.,Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shabnam Massah
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Anne Haegert
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Robert H Bell
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Manuel Altamirano-Dimas
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Colin C Collins
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Frank J S Lee
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Gratien G Prefontaine
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Michael E Cox
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Timothy V Beischlag
- The Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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24
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Lee E, Wang J, Jung Y, Cackowski FC, Taichman RS. Reduction of two histone marks, H3k9me3 and H3k27me3 by epidrug induces neuroendocrine differentiation in prostate cancer. J Cell Biochem 2018; 119:3697-3705. [PMID: 29236331 DOI: 10.1002/jcb.26586] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 12/06/2017] [Indexed: 12/21/2022]
Abstract
Neuroendocrine prostate cancer (NE PCa) is an aggressive malignancy, often presenting with advanced metastasis. We previously reported that reduction of histone marks regulated by DNMT1 following epidrug (5-Azacitidine, 5-Aza) treatment controls induction of epithelial to mesenchymal (EMT) and a cancer stem cell (CSC) phenotype, which facilitates tumorigenesis in PCa cells. Here, we use the epidrug 5-Aza as a model for how histone marks may regulate the reprogramming of prostate adenocarcinoma into NE phenotypic cells. First, we observed that 5-Aza treatment of PCa cells in vitro induces a neuron-like phenotype. In addition, significant increases in the expression of the NE markers N-Myc downstream regulated gene 1 (NDRG1), enolase-2 (ENO2), and synaptophysin were observed. Critically, a high density of NE cells with synaptophysin expression was found in tumors generated by 5-Aza pretreatment of PCa cells. Importantly, induction of NE differentiation of PCa cells was associated with an enhancement of NDRG1 expression by reduction of two histone marks, H3K9me3 and H3K27me3. Further, more NDRG1 expression was detected in the subset of PCa cells with reduced expression of H3K9me3 or H3K27me3 in the tumors generated by 5-Aza pretreated PCa cells and critically, these biological differences are also observed in small cell carcinoma in advanced stage of human primary PCa tumors. Our results suggest that reduction of histone marks regulated by the epidrug 5-Aza may control induction of a NE phenotype, which facilitates PCa progression. These studies suggest a strong rationale for developing therapeutics, which target epigenetic regulation.
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Affiliation(s)
- Eunsohl Lee
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor,, Michigan
| | - Jingcheng Wang
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor,, Michigan
| | - Younghun Jung
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor,, Michigan
| | - Frank C Cackowski
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor,, Michigan.,Department of Internal Medicine, Division of Hematology and Oncology, University of Michigan School of Medicine, Ann Arbor, Michigan
| | - Russell S Taichman
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor,, Michigan
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25
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Du A, Jiang Y, Fan C. NDRG1 Downregulates ATF3 and Inhibits Cisplatin-Induced Cytotoxicity in Lung Cancer A549 Cells. Int J Med Sci 2018; 15:1502-1507. [PMID: 30443171 PMCID: PMC6216061 DOI: 10.7150/ijms.28055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/30/2018] [Indexed: 01/19/2023] Open
Abstract
N-myc downstream regulated gene 1 (NDRG1) plays a variety of roles in human cancers. Our previous studies showed that NDRG1 expression is elevated in non-small cell lung cancer and contributes to cancer growth. However, its function in apoptosis and chemoresistance in malignant tumors, including lung cancer, is not yet fully understood. In this study, we investigated the roles of NDRG1 in chemoresistance to cisplatin in lung cancer cells. We found that overexpression of NDRG1 significantly reduced cisplatin-induced cytotoxicity in lung cancer A549 cells, while overexpression of activating transcription factor 3 (ATF3), a stress-inducible gene found to be associated with apoptosis in some human cancers, significantly promoted cytotoxicity (P < 0.05). Further investigation showed that overexpression of NDRG1 significantly downregulated ATF3 and P53 expression in A549 cells, while overexpression of ATF3 significantly upregulated P53 expression (P < 0.05). In addition, cisplatin significantly upregulated ATF3, phospho-P53(ser46), and cleaved caspase 3 expression in lung cancer cells, but overexpression of NDRG1 in the presence of cisplatin reduced the level of these proteins elevated by cisplatin (P < 0.05). While, overexpression of ATF3 significantly promoted the cytoxicity induced by cisplatin in 1299 cells (p<0.05) (Figure 4), but overexpression of NDRG1 didn't regulate the cytoxicity induced by cisplatin (p>0.05). These results indicate that NDRG1 may contribute to cisplatin-resistance in lung cancer, possibly due to its function in the regulation of ATF3 expression.
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Affiliation(s)
- Aolin Du
- Department of Pathology, First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, China
| | - Yufeng Jiang
- Department of Pathology, First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, China
| | - Chuifeng Fan
- Department of Pathology, First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, China
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26
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The hypoxia-responsive lncRNA NDRG-OT1 promotes NDRG1 degradation via ubiquitin-mediated proteolysis in breast cancer cells. Oncotarget 2017. [PMID: 29535820 PMCID: PMC5828211 DOI: 10.18632/oncotarget.23732] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Hypoxia can lead to solid tumor aggressiveness by driving multiple signaling pathways. Long non-coding RNAs respond to several extrinsic stimuli, causing changes in cancer cells by participating in multiple steps of gene expression. However, genomic profiling of long non-coding RNAs regulated by oxygen in breast cancer remained unclear. Therefore, the aims of this study were to identify oxygen-responsive long non-coding RNAs in breast cancer cells, and to delineate their regulatory mechanisms. The expression profiling of long non-coding RNAs in breast cancer cells growing under normoxic, hypoxic, and re-oxygenated conditions was examined using next-generation sequencing technology. Four hundred and seventy-two lncRNAs oxygen-responsive lncRNAs were identified. After examining the top three differentially expressed lncRNAs in hypoxia, we selected N-Myc Downstream Regulated Gene 1-Overlapping 1 (NDRG1-OT1) for further study, especially the most responsive isoform, NDRG1-OT1_v4. We overexpressed NDRG1-OT1_v4 under normoxia and performed microarray analysis to identify 108 NDRG1-OT1_v4 regulated genes and their functions. Among these genes, we found that both NDRG1 mRNA expression and NDRG1 protein levels were inhibited by NDRG1-OT1_v4. Finally, we used co-immunoprecipitation to show that NDRG1-OT1_v4 destabilizes NDRG1 by promoting ubiquitin-mediated proteolysis. Our findings reveal a new type of epigenetic regulation of NDRG1 by NDRG1-OT1_v4 in breast cancer cells.
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27
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Button EL, Bersten DC, Whitelaw ML. HIF has Biff – Crosstalk between HIF1a and the family of bHLH/PAS proteins. Exp Cell Res 2017; 356:141-145. [DOI: 10.1016/j.yexcr.2017.03.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 03/27/2017] [Indexed: 12/18/2022]
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28
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Said HM, Safari R, Al-Kafaji G, Ernestus RI, Löhr M, Katzer A, Flentje M, Hagemann C. Time- and oxygen-dependent expression and regulation of NDRG1 in human brain cancer cells. Oncol Rep 2017; 37:3625-3634. [PMID: 28498432 DOI: 10.3892/or.2017.5620] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 02/02/2017] [Indexed: 11/06/2022] Open
Abstract
N-myc downstream-regulated gene 1 (NDRG1) is a tumor suppressor with the potential to suppress metastasis, invasion and migration of cancer cells. It is regulated under stress conditions such as starvation or hypoxia. NDRG1 regulation is both induced and controlled by HIF-1α-dependent and -independent pathways under hypoxic conditions. However, there are profound differences in the way NDRG1 expression is regulated by HIF-1α and other transcription factors. Therefore, we aimed to define the time-dependent pattern of NDRG1 mRNA and protein expression in human glioblastoma cell lines in extreme hypoxia and after re-oxygenation as well as under normoxic conditions. Furthermore, we ascribe the regulation of NDRG1 to the transcription factors HIF-1α, SP1, CEBPα, YB-1 and Smad7 in a time-dependent manner. The human malignant glioma cell lines U87-MG, U373 and GaMG were cultured for 1, 6 and 24 h under hypoxic (0.1% O2) conditions and then they were re-oxygenated. The mRNA expression of NDRG1, HIF-1α SP1, CEBPα, YB-1 and Smad7 was measured using semi-quantitative RT-PCR analysis. Their protein expression was analyzed using western blotting. Our experiments revealed that long-term (24 h), but not short-term hypoxia led to the induction of NDRG1 expression in human glioma cell lines. NDRG1 expression was found to correlate with the protein expression of HIF-1α, SP1, CEBPα, YB-1 and Smad7. The present study suggests for the first time that SP1 regulates NDRG1 expression in glioma cells under hypoxia in a time-dependent manner along with HIF-1α, CEBPα, YB-1 and Smad7. These molecules, each separately or in combination, may possess the potential to become target molecules for antitumor therapeutic approaches particularly in human brain tumors.
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Affiliation(s)
- Harun Muayad Said
- Department of Molecular Medicine, Graduate School of Health Sciences, Dokuz Eylul University, Izmir, Turkey
| | - Roghaiyeh Safari
- Izmir Biomedicine and Genome (IBG) Center, Dokuz Eylul University, Izmir, Turkey
| | - Ghada Al-Kafaji
- Department of Molecular Medicine, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
| | | | - Mario Löhr
- Department of Neurosurgery, University of Würzburg, Würzburg, Germany
| | - Astrid Katzer
- Department of Radiation Oncology, University of Würzburg, Würzburg, Germany
| | - Michael Flentje
- Department of Radiation Oncology, University of Würzburg, Würzburg, Germany
| | - Carsten Hagemann
- Department of Neurosurgery, University of Würzburg, Würzburg, Germany
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29
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Cen G, Zhang K, Cao J, Qiu Z. Downregulation of the N-myc downstream regulated gene 1 is related to enhanced proliferation, invasion and migration of pancreatic cancer. Oncol Rep 2017; 37:1189-1195. [PMID: 28075464 DOI: 10.3892/or.2017.5355] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/27/2016] [Indexed: 11/06/2022] Open
Abstract
The N-myc downstream regulated gene 1 (NDRG1) is differently expressed in human malignancies according to the tumor type. We investigated the expression of NDRG1 in pancreatic cancer tissues and cell lines as well as how it affects tumor growth, invasion and migration in pancreatic cancer cells. Experimental groups included NDRG1 overexpression and knockdown pancreatic cancer cell lines. Lentivirus-based empty vector transfected cells (NC group) were considered control groups. Proliferation, invasion and migration related proteins such as STAT3, MMPs, PTEN, PI3K/AKT were assessed by CCK-8, Transwell assay and western blotting. Efficient NDRG1 overexpression results in reduced cell proliferation, invasion and migration. Inversely, downregulation of NDRG1 promoted proliferation, invasion and migration. We also found NDRG1 could deactivate p-STAT3, PI3K, p-AKT, MMP2, MMP9 and activate PTEN. NDRG1 is a potential anti-oncogene. Its upregulation significantly decreases pancreatic cancer tumorigenesis, likely by inhibiting STAT3 and the PI3K/AKT signaling pathway.
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Affiliation(s)
- Gang Cen
- Department of General Surgery, Shanghai General Hospital of Nanjing Medical University, 100 Haining Road, Shanghai 200080, P.R. China
| | - Kundong Zhang
- Department of General Surgery, Shanghai General Hospital of Nanjing Medical University, 100 Haining Road, Shanghai 200080, P.R. China
| | - Jun Cao
- Department of General Surgery, Shanghai General Hospital of Nanjing Medical University, 100 Haining Road, Shanghai 200080, P.R. China
| | - Zhengjun Qiu
- Department of General Surgery, Shanghai General Hospital of Nanjing Medical University, 100 Haining Road, Shanghai 200080, P.R. China
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30
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Lu WJ, Chua MS, Wei W, So SK. NDRG1 promotes growth of hepatocellular carcinoma cells by directly interacting with GSK-3β and Nur77 to prevent β-catenin degradation. Oncotarget 2016; 6:29847-59. [PMID: 26359353 PMCID: PMC4745767 DOI: 10.18632/oncotarget.4913] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 08/07/2015] [Indexed: 02/01/2023] Open
Abstract
The N-myc downstream regulated gene 1 (NDRG1) is significantly associated with advanced tumor stages and poor survival of hepatocellular carcinoma (HCC), thereby implicating it as a potential target for HCC treatment. We aim to further understand its biological roles in hepatocarcinogenesis, as a means to exploit it for therapeutic purposes. By screening using the ProtoArray® Human Protein Microarrays, we identified glycogen synthase kinase 3β (GSK-3β) and the orphan nuclear receptor (Nur77) as potential interaction partners of NDRG1. These interactions were confirmed in HCC cell lines in vitro by co-immunoprecipitation; and co-localizations of NDRG1 with GSK-3β and Nur77 were observed by immunofluorescence staining. Additionally, high levels of NDRG1 competitively bind to GSK-3β and Nur77 to allow β-catenin to escape degradation, with consequent elevated levels of downstream oncogenic genes. In vivo, we consistently observed that NDRG1 suppression in HCC xenografts decreased β-catenin levels and its downstream target Cyclin D1, with concomitant tumor growth inhibition. Clinically, the over-expression of NDRG1 in HCC patient samples is positively correlated with GSK-3β-9ser (| R | = 0.28, p = 0.01), Nur77 (| R | = 0.42, p < 0.001), and β-catenin (| R |= 0.32, p = 0.003) expressions. In conclusion, we identified GSK-3β and Nur77 as novel interaction partners of NDRG1. These protein-protein interactions regulate the turnover of β-catenin and subsequent downstream signaling mediated by β-catenin in HCC cells, and provides potential targets for future therapeutic interventions.
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Affiliation(s)
- Wen-Jing Lu
- Asian Liver Center, Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Mei-Sze Chua
- Asian Liver Center, Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Wei Wei
- Asian Liver Center, Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Samuel K So
- Asian Liver Center, Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
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31
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Aryl Hydrocarbon Receptor Activates NDRG1 Transcription under Hypoxia in Breast Cancer Cells. Sci Rep 2016; 6:20808. [PMID: 26852918 PMCID: PMC4745107 DOI: 10.1038/srep20808] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 01/12/2016] [Indexed: 12/12/2022] Open
Abstract
Hypoxia has been intensively investigated over the past several decades based on the observations that hypoxic tumors are more resistant to therapy and have a worse prognosis. Previously, we reported that N-myc downstream-regulated gene 1 (NDRG1) is strongly up-regulated under hypoxia and may play an important role in tumor adaptation to fluctuating oxygen concentrations. However, the regulatory mechanism of NDRG1 under hypoxia remains elusive. Therefore, the purpose of this study was to identify the transcription factors that regulate NDRG1 and to investigate the functional roles of NDRG1 in hypoxia. We showed that binding sites of aryl hydrocarbon receptor (AHR) were predicted in the NDRG1 promoter. Nuclear AHR was up-regulated in the presence of cobalt and hypoxia. AHR translocated to nuclei and bound between base pairs -412 and -388 of the NDRG1 promoter in hypoxia. Moreover, hypoxia-mimetic induction of NDRG1 was attenuated by knockdown of AHR expression. Also, overexpression of AHR facilitated cell proliferation and migration via up-regulation of NDRG1. These results showed for the first time that AHR positively regulates NDRG1 transcription through an AHR binding site by way of hypoxia-mimetic signaling, which may lead to development of a specific therapeutic regimen to prevent tumor malignancy under hypoxia.
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32
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Qian J, Bai H, Gao Z, Dong YU, Pei J, Ma M, Han B. Downregulation of HIF-1α inhibits the proliferation and invasion of non-small cell lung cancer NCI-H157 cells. Oncol Lett 2016; 11:1738-1744. [PMID: 26998070 PMCID: PMC4774571 DOI: 10.3892/ol.2016.4150] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 12/02/2015] [Indexed: 01/01/2023] Open
Abstract
Lung cancer, specifically non-small cell lung cancer (NSCLC), is the leading cause of cancer-associated mortality in the world. In previous years, almost no significant advancements have been made towards the molecular characterization of NSCLC, which highlights the requirement for novel target genes. Hypoxia inducible factor-1α (HIF-1α) is known to be essential in tumorigenesis, as it regulates the expression of numerous factors that are involved in angiogenesis, cellular proliferation and apoptosis. However, no direct association between HIF-1α and NSCLC treatment has previously been established. The aim of the present study was to characterize the effect of HIF-1α on NSCLC and to explore the possible mechanism. Additionally, HIF-1α small interfering (si)RNA and diamminedichloroplatinum (DDP) were used in combination to explore the combined effects on NSCLC cells. Lung carcinoma NCI-H157 cells were treated with HIF-1α small interfering (si)RNA, 5 µg/ml DDP or a combination of the two, and the proliferation, apoptosis and invasion ability of the cells were detected using a cell counting kit-8 assay, Annexin V/propidium iodide staining and a Transwell assay, respectively. In addition, the protein levels of caspase-3/9, anti-apoptotic protein B-cell lymphoma-2 (Bcl-2), vascular endothelial growth factor (VEGF), pigment epithelium-derived factor (PEDF), phosphoinositide 3-kinase (PI3K), phosphorylated (p-)PI3K, protein kinase B (AKT), p-AKT, extracellular signal-regulated kinase (ERK) and p-ERK were detected using western blot analysis. Similar to DPP treatment, HIF-1α siRNA treatment may reduce cell proliferation and the invasiveness of tumor cells while promoting apoptosis. Additionally, HIF-1α siRNA may increase the levels of the apoptotic proteins caspases 3 and 9 and inhibit the expression of Bcl-2. These anti-tumor effects may be acting through the VEGF/PEDF, PI3K/AKT and Raf/mitogen-activated protein kinase kinase/ERK signaling pathways. The effects of HIF-1α siRNA may be strengthened by DDP. The present data indicated that HIF-1α siRNA is important in the inhibition of NSCLC cells. Additionally, the effects of HIF-1α siRNA may be strengthened by DDP, which suggests that HIF-1α siRNA may be combined with DDP for the treatment of tumors.
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Affiliation(s)
- Jialin Qian
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Hao Bai
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Zhiqiang Gao
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Y U Dong
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Jun Pei
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Meili Ma
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Baohui Han
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
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RGS19 converts iron deprivation stress into a growth-inhibitory signal. Biochem Biophys Res Commun 2015; 464:168-75. [DOI: 10.1016/j.bbrc.2015.06.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 06/16/2015] [Indexed: 11/20/2022]
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Hu ZY, Xie WB, Yang F, Xiao LW, Wang XY, Chen SY, Li ZG. NDRG1 attenuates epithelial-mesenchymal transition of nasopharyngeal cancer cells via blocking Smad2 signaling. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1876-86. [PMID: 26071641 DOI: 10.1016/j.bbadis.2015.06.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 05/26/2015] [Accepted: 06/08/2015] [Indexed: 12/12/2022]
Abstract
N-myc downstream-regulated gene 1 (NDRG1) has been implicated in tumorigenesis and metastasis in different cancers. However, its role in nasopharyngeal carcinoma remains unknown. We found that NDRG1 expression level was high in nasopharyngeal cancer 5-8F cells but low in 5-8F-LN cells with lymphatic metastasis potential. Knockdown of NDRG1 by shRNA promoted 5-8F cell proliferation, migration, and invasion in vitro and its tumorigenesis in vivo. Moreover, NDRG1 deficiency induced an epithelial-mesenchymal transition (EMT) of 5-8F cells as shown by an attenuation of E-cadherin and an induction of N-cadherin and vimentin expression. NDRG1 knockdown also enhanced Smad2 expression and phosphorylation. Smad2 signaling was attenuated in 5-8F cells but was significantly activated in 5-8F-LN cells. Knockdown of Smad2 restored E-cadherin but attenuated N-cadherin expression in NDRG1-deficient 5-8F cells, suggesting a reduction of EMT. Consistently, blockade of Smad2 in 5-8F-LN cells increased E-cadherin while diminishing N-cadherin and vimentin expression. These data indicate that Smad2 mediates the NDRG1 deficiency-induced EMT of 5-8F cells. In tumors derived from NDRG1-deficient 5-8F cells, E-cadherin expression was inhibited while vimentin and Smad2 were increased in a large number of cancer cells. Most importantly, NDRG1 expression was attenuated in human nasopharyngeal carcinoma tissues, resulted in a lower survival rate in patients. The NDRG1 was further decreased in the detached nasopharyngeal cancer cells, which was associated with a further reduced survival rate in patients with lymphatic metastasis. Taken together, these results demonstrated that NDRG1 prevents nasopharyngeal tumorigenesis and metastasis via inhibiting Smad2-mediated EMT of nasopharyngeal cells.
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Affiliation(s)
- Zhi-Yan Hu
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Wei-Bing Xie
- Department of Forensic Science, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Fang Yang
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Li-Wei Xiao
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Xiao-Yan Wang
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Shi-You Chen
- Department of Physiology & Pharmacology, University of Georgia, Athens, GA, United States.
| | - Zu-Guo Li
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.
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A membrane-type-1 matrix metalloproteinase (MT1-MMP)-discoidin domain receptor 1 axis regulates collagen-induced apoptosis in breast cancer cells. PLoS One 2015; 10:e0116006. [PMID: 25774665 PMCID: PMC4638154 DOI: 10.1371/journal.pone.0116006] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 12/03/2014] [Indexed: 11/19/2022] Open
Abstract
During tumour dissemination, invading breast carcinoma cells become confronted with a reactive stroma, a type I collagen-rich environment endowed with anti-proliferative and pro-apoptotic properties. To develop metastatic capabilities, tumour cells must acquire the capacity to cope with this novel microenvironment. How cells interact with and respond to their microenvironment during cancer dissemination remains poorly understood. To address the impact of type I collagen on the fate of tumour cells, human breast carcinoma MCF-7 cells were cultured within three-dimensional type I collagen gels (3D COL1). Using this experimental model, we have previously demonstrated that membrane type-1 matrix metalloproteinase (MT1-MMP), a proteinase overexpressed in many aggressive tumours, promotes tumour progression by circumventing the collagen-induced up-regulation of BIK, a pro-apoptotic tumour suppressor, and hence apoptosis. Here we performed a transcriptomic analysis to decipher the molecular mechanisms regulating 3D COL1-induced apoptosis in human breast cancer cells. Control and MT1-MMP expressing MCF-7 cells were cultured on two-dimensional plastic plates or within 3D COL1 and a global transcriptional time-course analysis was performed. Shifting the cells from plastic plates to 3D COL1 activated a complex reprogramming of genes implicated in various biological processes. Bioinformatic analysis revealed a 3D COL1-mediated alteration of key cellular functions including apoptosis, cell proliferation, RNA processing and cytoskeleton remodelling. By using a panel of pharmacological inhibitors, we identified discoidin domain receptor 1 (DDR1), a receptor tyrosine kinase specifically activated by collagen, as the initiator of 3D COL1-induced apoptosis. Our data support the concept that MT1-MMP contributes to the inactivation of the DDR1-BIK signalling axis through the cleavage of collagen fibres and/or the alteration of DDR1 receptor signalling unit, without triggering a drastic remodelling of the transcriptome of MCF-7 cells.
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Mokhonova EI, Avliyakulov NK, Kramerova I, Kudryashova E, Haykinson MJ, Spencer MJ. The E3 ubiquitin ligase TRIM32 regulates myoblast proliferation by controlling turnover of NDRG2. Hum Mol Genet 2015; 24:2873-83. [PMID: 25701873 DOI: 10.1093/hmg/ddv049] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 02/02/2015] [Indexed: 12/14/2022] Open
Abstract
Limb girdle muscular dystrophy 2H is caused by mutations in the gene encoding the E3 ubiquitin ligase, TRIM32. Previously, we generated and characterized a Trim32 knockout mouse (T32KO) that displays both neurogenic and myopathic features. The myopathy in these mice is attributable to impaired muscle growth, associated with satellite cell senescence and premature sarcopenia. This satellite cell senescence is due to accumulation of the SUMO ligase PIASy, a substrate of TRIM32. The goal of this investigation was to identify additional substrates of TRIM32 using 2D fluorescence difference gel electrophoresis (2D-DIGE) in order to further explore its role in skeletal muscle. Because TRIM32 is an E3 ubiquitin ligase, we reasoned that TRIM32's substrates would accumulate in its absence. 2D-DIGE identified 19 proteins that accumulate in muscles from the T32KO mouse. We focused on two of these proteins, NDRG2 and TRIM72, due to their putative roles in myoblast proliferation and myogenesis. Follow-up analysis confirmed that both proteins were ubiquitinated by TRIM32 in vitro; however, only NDRG2 accumulated in skeletal muscle and myoblasts in the absence of TRIM32. NDRG2 overexpression in myoblasts led to reduced cell proliferation and delayed cell cycle withdrawal during differentiation. Thus, we identified NDRG2 as a novel target for TRIM32; these findings further corroborate the hypothesis that TRIM32 is involved in control of myogenic cells proliferation and differentiation.
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Affiliation(s)
| | - Nuraly K Avliyakulov
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | | | | | - Michael J Haykinson
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Melissa J Spencer
- Department of Neurology and Center for Duchenne Muscular Dystrophy at UCLA, Los Angeles, CA, USA and Molecular Biology Institute, UCLA, Los Angeles, CA, USA
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A prolyl-hydroxylase inhibitor, ethyl-3,4-dihydroxybenzoate, induces cell autophagy and apoptosis in esophageal squamous cell carcinoma cells via up-regulation of BNIP3 and N-myc downstream-regulated gene-1. PLoS One 2014; 9:e107204. [PMID: 25232961 PMCID: PMC4169646 DOI: 10.1371/journal.pone.0107204] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Accepted: 08/12/2014] [Indexed: 12/14/2022] Open
Abstract
The protocatechuic acid ethyl ester ethyl-3,4-dihydroxybenzoate is an antioxidant found in the testa of peanut seeds. Previous studies have shown that ethyl-3,4-dihydroxybenzoate can effectively reduce breast cancer cell metastasis by inhibiting prolyl-hydroxylase. In this study, we investigated the cytotoxic effect of ethyl-3,4-dihydroxybenzoate on esophageal squamous cell carcinoma cells in vitro and identified key regulators of ethyl-3,4-dihydroxybenzoate-induced esophageal cancer cell death through transcription expression profiling. Using flow cytometry analysis, we found that ethyl-3,4-dihydroxybenzoate induced S phase accumulation, a loss in mitochondrial membrane permeabilization, and caspase-dependent apoptosis. Moreover, an expression profile analysis identified 46 up- and 9 down-regulated genes in esophageal cancer KYSE 170 cells treated with ethyl-3,4-dihydroxybenzoate. These differentially expressed genes are involved in several signaling pathways associated with cell cycle regulation and cellular metabolism. Consistent with the expression profile results, the transcriptional and protein expression levels of candidate genes NDRG1, BNIP3, AKR1C1, CCNG2 and VEGFA were found to be significantly increased in treated KYSE 170 cells by reverse-transcription PCR and western blot analysis. We also found that protein levels of hypoxia-inducible factor-1α, BNIP3, Beclin and NDRG1 were increased and that enriched expression of BNIP3 and Beclin caused autophagy mediated by microtubule-associated protein 1 light chain 3 in the treated cells. Autophagy and apoptosis were activated together in esophageal cancer cells after exposed to ethyl-3,4-dihydroxybenzoate. Furthermore, knock-down of NDRG1 expression by siRNA significantly attenuated apoptosis in the cancer cells, implying that NDRG1 may be required for ethyl-3,4-dihydroxybenzoate-induced apoptosis. Together, these results suggest that the cytotoxic effects of ethyl-3,4-dihydroxybenzoate were mediated by the up-regulation of NDRG1, BNIP3, Beclin and hypoxia-inducible factor-1α, initiating BNIP3 and Beclin mediated autophagy at an early stage and ultimately resulting in esophageal cancer cell apoptosis.
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MicroRNA-769-3p down-regulates NDRG1 and enhances apoptosis in MCF-7 cells during reoxygenation. Sci Rep 2014; 4:5908. [PMID: 25081069 PMCID: PMC4118187 DOI: 10.1038/srep05908] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 06/24/2014] [Indexed: 12/30/2022] Open
Abstract
Hypoxia and reoxygenation are common characteristics of solid tumors, which lead to oxidative stress and activation of stress-response genes. Previously, we observed that N-myc downstream-regulated gene 1 (NDRG1) was strongly down-regulated after shifting to reoxygenation, but the regulatory mechanism of NDRG1 remained elusive. Here we focused on the regulation of NDRG1 by microRNAs (miRNAs). Breast cancer MCF-7 cells were cultured under hypoxia for 24 h followed by 24 h of reoxygenation. The miRNA profiles were examined by Nanostring nCounter assays. Forty-three miRNAs had significant changes upon reoxygenation. In silico analysis identified four oxygen-sensitive miRNAs whose seed regions perfectly matched the 3′-UTR of NDRG1. In particular, miR-769-3p was able to inhibit the expression of NDRG1, which caused a significant reduction of NDRG1 protein upon reoxygenation. Furthermore, overexpression of miR-769-3p significantly inhibited cell proliferation and enhanced apoptosis. Our results revealed that miR-769-3p can functionally regulate NDRG1 during changes in oxygen concentration.
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Li X, Liu X, Xu Y, Liu J, Xie M, Ni W, Chen S. KLF5 promotes hypoxia-induced survival and inhibits apoptosis in non-small cell lung cancer cells via HIF-1α. Int J Oncol 2014; 45:1507-14. [PMID: 25051115 DOI: 10.3892/ijo.2014.2544] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 06/30/2014] [Indexed: 11/06/2022] Open
Abstract
Transcription factor Krüppel-like factors 5 (KLF5) is overexpressed in a wide range of tumor tissues and acts as a prognostic factor in cancer. However, the role of KLF5 in non-small cell lung cancer is not clear. Hypoxia plays a vital part in the development of cancer via hypoxia-inducible factor 1 (HIF-1). Our study showed that hypoxia (1% O2) increased cell viability, clonality and proliferation and inhibited cell apoptosis in A549 cells. The expression of HIF-1α and KLF5 was increased time-dependently in hypoxia. Using small interfering RNA (siRNA) targeting KLF5 or HIF-1α, we demonstrated that KLF5 or HIF-1α knockdown inhibited hypoxia-induced cell survival and promoted cell apoptosis by actively downregulating cyclin B1, survivin and upregulating caspase-3. Given the similar effect of KLF5 and HIF-1α on cell survival, an attempt was made to investigate the putative interaction of them in hypoxia. KLF5 was revealed to co-immunoprecipitate with HIF-1α and hypoxia increased the amount of KLF5 and HIF-1α complex. Moreover, silencing of KLF5 decreased HIF-1α expression while KLF5 was not affected by HIF-1α inhibition in hypoxia, confirming the effect of KLF5 on upregulation of HIF-1α. In conclusion, this study identified hypoxia as a tumor promoter by triggering KLF5 → HIF-1α → cyclin B1/survivin/caspase-3 in lung cancer cells.
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Affiliation(s)
- Xiaochen Li
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Xiansheng Liu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Yongjian Xu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Jin Liu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Min Xie
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Wang Ni
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
| | - Shixin Chen
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R. China
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NDRG1 expression is related to the progression and prognosis of gastric cancer patients through modulating proliferation, invasion and cell cycle of gastric cancer cells. Mol Biol Rep 2014; 41:6215-23. [PMID: 24985974 DOI: 10.1007/s11033-014-3501-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 06/17/2014] [Indexed: 12/12/2022]
Abstract
N-myc downstream-regulated gene 1 (NDRG1) has been proposed as a tumor suppressor gene in many different types of tumors, but its potential function and corresponding mechanism are not yet fully elucidated. This study aims to detect the possible function of NDRG1 in gastric cancer progression. In this study, 112 paired gastric cancer tissues and corresponding nonmalignant gastric tissues were utilized to identify the differential protein expression of NDRG1 by immunohistochemistry and its clinical significance was analyzed. Furthermore, 49 of 112 paired gastric specimens were used to detect the differential mRNA expression by real-time PCR. The over expression of NDRG1 in human gastric cancer cell line AGS by PcDNA3.1-NDRG1 transfection was utilized to detect the role of NDRG1 in regulating the biological behavior of gastric cancer. NDRG1 expression was significantly decreased in primary gastric cancer tissues, compared with its corresponding nonmalignant gastric tissues (p < 0.05), and its decreased expression was significantly associated with lymph node metastasis (p < 0.01), invasion depth (p < 0.01) and differentiation (p < 0.05). Additionally, the overall survival rate of gastric cancer patients with high expression of NDRG1 was higher than those with low expression during the follow-up period. NDRG1 overexpression suppressed cells proliferation, invasion and induced a G1 cell cycle arrest in gastric cancer. Furthermore, the down-regulation of NDRG1 in gastric cancer metastatic progression was correlated to E-cadherin and MMP-9. Our results verify that NDRG1 acts as a tumor suppressor gene and may play an important role in the metastasis progression and prognosis of gastric cancer.
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Ma X, Jia Y, Zu S, Li R, Jia Y, Zhao Y, Xiao D, Dang N, Wang Y. Alpha5 nicotinic acetylcholine receptor mediates nicotine-induced HIF-1α and VEGF expression in non-small cell lung cancer. Toxicol Appl Pharmacol 2014; 278:172-9. [DOI: 10.1016/j.taap.2014.04.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/10/2014] [Accepted: 04/21/2014] [Indexed: 01/06/2023]
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Fang BA, Kovačević Ž, Park KC, Kalinowski DS, Jansson PJ, Lane DJR, Sahni S, Richardson DR. Molecular functions of the iron-regulated metastasis suppressor, NDRG1, and its potential as a molecular target for cancer therapy. Biochim Biophys Acta Rev Cancer 2013; 1845:1-19. [PMID: 24269900 DOI: 10.1016/j.bbcan.2013.11.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/11/2013] [Accepted: 11/13/2013] [Indexed: 12/11/2022]
Abstract
N-myc down-regulated gene 1 (NDRG1) is a known metastasis suppressor in multiple cancers, being also involved in embryogenesis and development, cell growth and differentiation, lipid biosynthesis and myelination, stress responses and immunity. In addition to its primary role as a metastasis suppressor, NDRG1 can also influence other stages of carcinogenesis, namely angiogenesis and primary tumour growth. NDRG1 is regulated by multiple effectors in normal and neoplastic cells, including N-myc, histone acetylation, hypoxia, cellular iron levels and intracellular calcium. Further, studies have found that NDRG1 is up-regulated in neoplastic cells after treatment with novel iron chelators, which are a promising therapy for effective cancer management. Although the pathways by which NDRG1 exerts its functions in cancers have been documented, the relationship between the molecular structure of this protein and its functions remains unclear. In fact, recent studies suggest that, in certain cancers, NDRG1 is post-translationally modified, possibly by the activity of endogenous trypsins, leading to a subsequent alteration in its metastasis suppressor activity. This review describes the role of this important metastasis suppressor and discusses interesting unresolved issues regarding this protein.
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Affiliation(s)
- Bernard A Fang
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Žaklina Kovačević
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Kyung Chan Park
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Danuta S Kalinowski
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Patric J Jansson
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Darius J R Lane
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Sumit Sahni
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia
| | - Des R Richardson
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, Blackburn Building (D06), The University of Sydney, Sydney, NSW 2006, Australia.
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Inhibition of monocarboxylate transporter-4 depletes stem-like glioblastoma cells and inhibits HIF transcriptional response in a lactate-independent manner. Oncogene 2013; 33:4433-41. [PMID: 24077291 DOI: 10.1038/onc.2013.390] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/01/2013] [Accepted: 08/13/2013] [Indexed: 12/27/2022]
Abstract
Hypoxic regions are frequent in glioblastoma (GBM), the most common type of malignant adult brain tumor, and increased levels of tumor hypoxia have been associated with worse clinical outcomes. To unmask genes important in hypoxia, we treated GBM neurospheres in hypoxia and identified monocarboxylate transporter-4 (MCT4) as one of the most upregulated genes. To investigate the clinical importance of MCT4 in GBM, we examined clinical outcomes and found that MCT4 overexpression is associated with shorter patient survival. Consistent with this, MCT4 upregulation correlated with the aggressive mesenchymal subset of GBM, and MCT4 downregulation correlated with the less aggressive G-CIMP (Glioma CpG Methylator Phenotype) subset of GBM. Immunohistochemical analysis of tissue microarrays confirmed that MCT4 protein levels were increased in high-grade as compared with lower-grade astrocytomas, further suggesting that MCT4 is a clinically relevant target. To test the requirement for MCT4 in vitro, we transduced neurospheres with lentiviruses encoding short-hairpin RNAs (shRNAs) against MCT4, resulting in growth inhibition of 50-80% under hypoxia in two lines. MCT4 knockdown was associated with a decreased percentage of cells expressing the stem-cell marker CD133 and increased apoptotic fraction. We also found that flow-sorted CD133-positive cells had almost sixfold higher MCT4 levels than CD133-negative cells, suggesting that the stem-like population might have a greater requirement for MCT4. Most importantly, MCT4 silencing also slowed GBM intracranial xenograft growth in vivo. Interestingly, whereas MCT4 is a well-characterized lactate exporter, we found that both intracellular and extracellular lactate levels did not change following MCT4 silencing, suggesting a novel lactate export-independent mechanism for growth inhibition in GBMs. To identify this potential mechanism, we performed microarray analysis on control and shMCT4-expressing neurospheres and found a dramatic reduction in the expression of multiple Hypoxia-Inducible Factor (HIF)-regulated genes following MCT4 knockdown. The overall reduction in HIF transcriptional response was further validated using a hypoxia response element (HRE)-dependent green-fluorescent protein (GFP) reporter line.
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Mao S, Huang S. The signaling pathway of hypoxia inducible factor and its role in renal diseases. J Recept Signal Transduct Res 2013; 33:344-8. [PMID: 23971630 DOI: 10.3109/10799893.2013.830130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
It is well-documented that hypoxia inducible factor (HIF) is a key mediator of tissue and cellular adaptation to hypoxia. HIF-target genes are also involved in cellular apoptosis and profibrotic mechanisms. The role of HIF in diseases is not consistent. It is a risk factor for tumor progression, whereas it plays a protective role against ischemic hypofusion. For renal diseases, it is not always a risk or protective factor. Many factors are involved in the pathogenesis of renal diseases. It is reported that HIF not only increases hypoxia tolerance, but also regulates a lot of signaling pathways. In the past decades, a number of studies were also conducted to explore the association between HIF and the risk of renal diseases. However, the role of HIF in the development of renal diseases was not entirely clear. In this study, the signal transduction pathways of HIF and its role in the pathogenesis of renal diseases were reviewed.
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Affiliation(s)
- Song Mao
- Department of Nephrology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University , Nanjing, Jiangsu , China
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