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Thévenod F, Herbrechter R, Schlabs C, Pethe A, Lee WK, Wolff NA, Roussa E. Role of the SLC22A17/lipocalin-2 receptor in renal endocytosis of proteins/metalloproteins: a focus on iron- and cadmium-binding proteins. Am J Physiol Renal Physiol 2023; 325:F564-F577. [PMID: 37589051 DOI: 10.1152/ajprenal.00020.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 08/18/2023] Open
Abstract
The transmembrane protein SLC22A17 [or the neutrophil gelatinase-associated lipocalin/lipocalin-2 (LCN2)/24p3 receptor] is an atypical member of the SLC22 family of organic anion and cation transporters: it does not carry typical substrates of SLC22 transporters but mediates receptor-mediated endocytosis (RME) of LCN2. One important task of the kidney is the prevention of urinary loss of proteins filtered by the glomerulus by bulk reabsorption of multiple ligands via megalin:cubilin:amnionless-mediated endocytosis in the proximal tubule (PT). Accordingly, overflow, glomerular, or PT damage, as in Fanconi syndrome, results in proteinuria. Strikingly, up to 20% of filtered proteins escape the PT under physiological conditions and are reabsorbed by the distal nephron. The renal distal tubule and collecting duct express SLC22A17, which mediates RME of filtered proteins that evade the PT but with limited capacity to prevent proteinuria under pathological conditions. The kidney also prevents excretion of filtered essential and nonessential transition metals, such as iron or cadmium, respectively, that are largely bound to proteins with high affinity, e.g., LCN2, transferrin, or metallothionein, or low affinity, e.g., microglobulins or albumin. Hence, increased uptake of transition metals may cause nephrotoxicity. Here, we assess the literature on SLC22A17 structure, topology, tissue distribution, regulation, and assumed functions, emphasizing renal SLC22A17, which has relevance for physiology, pathology, and nephrotoxicity due to the accumulation of proteins complexed with transition metals, e.g., cadmium or iron. Other putative renal functions of SLC22A17, such as its contribution to osmotic stress adaptation, protection against urinary tract infection, or renal carcinogenesis, are discussed.
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Affiliation(s)
- Frank Thévenod
- Institute for Physiology, Pathophysiology and Toxicology, Center for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany
- Physiology and Pathophysiology of Cells and Membranes, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Robin Herbrechter
- Institute for Physiology, Pathophysiology and Toxicology, Center for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany
| | - Carolin Schlabs
- Institute for Physiology, Pathophysiology and Toxicology, Center for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany
| | - Abhishek Pethe
- Department of Molecular Embryology, Faculty of Medicine, Institute of Anatomy and Cell Biology, University of Freiburg, Freiburg im Breisgau, Germany
| | - Wing-Kee Lee
- Physiology and Pathophysiology of Cells and Membranes, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Natascha A Wolff
- Institute for Physiology, Pathophysiology and Toxicology, Center for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany
| | - Eleni Roussa
- Department of Molecular Embryology, Faculty of Medicine, Institute of Anatomy and Cell Biology, University of Freiburg, Freiburg im Breisgau, Germany
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2
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Živalj M, Van Ginderachter JA, Stijlemans B. Lipocalin-2: A Nurturer of Tumor Progression and a Novel Candidate for Targeted Cancer Therapy. Cancers (Basel) 2023; 15:5159. [PMID: 37958332 PMCID: PMC10648573 DOI: 10.3390/cancers15215159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Within the tumor microenvironment (TME) exists a complex signaling network between cancer cells and stromal cells, which determines the fate of tumor progression. Hence, interfering with this signaling network forms the basis for cancer therapy. Yet, many types of cancer, in particular, solid tumors, are refractory to the currently used treatments, so there is an urgent need for novel molecular targets that could improve current anti-cancer therapeutic strategies. Lipocalin-2 (Lcn-2), a secreted siderophore-binding glycoprotein that regulates iron homeostasis, is highly upregulated in various cancer types. Due to its pleiotropic role in the crosstalk between cancer cells and stromal cells, favoring tumor progression, it could be considered as a novel biomarker for prognostic and therapeutic purposes. However, the exact signaling route by which Lcn-2 promotes tumorigenesis remains unknown, and Lcn-2-targeting moieties are largely uninvestigated. This review will (i) provide an overview on the role of Lcn-2 in orchestrating the TME at the level of iron homeostasis, macrophage polarization, extracellular matrix remodeling, and cell migration and survival, and (ii) discuss the potential of Lcn-2 as a promising novel drug target that should be pursued in future translational research.
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Affiliation(s)
- Maida Živalj
- Brussels Center for Immunology, Vrije Universiteit Brussel, 1050 Brussels, Belgium
- Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, 1050 Brussels, Belgium
| | - Jo A. Van Ginderachter
- Brussels Center for Immunology, Vrije Universiteit Brussel, 1050 Brussels, Belgium
- Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, 1050 Brussels, Belgium
| | - Benoit Stijlemans
- Brussels Center for Immunology, Vrije Universiteit Brussel, 1050 Brussels, Belgium
- Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, 1050 Brussels, Belgium
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3
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Khan A, Singh A, Singh P, Kumar R, Ojha KK, Singh VK, Srivastava A. LCN2-Fungal siderophore-iron binding and uptake leads to oxidative stress and cell death in hepatocellular carcinoma cell line HepG2. J Biomol Struct Dyn 2023; 41:12714-12733. [PMID: 36762696 DOI: 10.1080/07391102.2023.2175380] [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: 10/27/2022] [Accepted: 01/05/2023] [Indexed: 02/11/2023]
Abstract
Microorganisms produce non-ribosomal peptides called siderophores for the purpose of iron acquisition. Mammalian immune system is well-known for producing small secretory proteins called lipocalins upon bacterial infection. These proteins sequester siderophores produced by invading bacterial pathogens rendering them unable to acquire iron from the host. However, this is not their sole function. In addition to transferrin and lactoferrin, lipocalins are also known to transport siderophore-bound iron to the host cells. While binding of bacterial siderophores with human lipocalin is well studied, binding of the fungal counterpart is still not confirmed and fully understood. Apart from pathogen-affected cells, developing cancerous cells also show varying expression level of different proteins including those involved in iron transport. The possibility of exogenous fungal siderophore-mediated iron transport via lipocalin and its receptor in mammalian cells has not yet been explored much. In present investigation we have checked differential expression of human lipocalin, LCN2 in hepatocellular carcinoma cell lines HepG2 as well as its normal counterpart WRL-68 and computationally determined the feasibility of LCN2 binding with fungal siderophore. Further in case of a stable complex being formed, whether this complex has the ability to transport iron through its specific receptor was assessed. Also, we have tried to explore possible mechanism of fungal-siderophore mediated oxidative stress leading to significant cell death in cancerous cells. This study will thus be useful towards finding a new way of treating hepatocellular carcinoma via inducing siderophore-mediated cell death in cancerous cells.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Azmi Khan
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Ashutosh Singh
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Pratika Singh
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Rakesh Kumar
- Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Krishna Kumar Ojha
- Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Vijay Kumar Singh
- Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
| | - Amrita Srivastava
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, Bihar
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4
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Li Q, Ru X, Yang Y, Zhao H, Qu J, Chen W, Pan P, Ruan H, Li C, Chen Y, Feng H. Lipocalin-2-Mediated Insufficient Oligodendrocyte Progenitor Cell Remyelination for White Matter Injury After Subarachnoid Hemorrhage via SCL22A17 Receptor/Early Growth Response Protein 1 Signaling. Neurosci Bull 2022; 38:1457-1475. [PMID: 35817941 DOI: 10.1007/s12264-022-00906-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/26/2022] [Indexed: 10/17/2022] Open
Abstract
Insufficient remyelination due to impaired oligodendrocyte precursor cell (OPC) differentiation and maturation is strongly associated with irreversible white matter injury (WMI) and neurological deficits. We analyzed whole transcriptome expression to elucidate the potential role and underlying mechanism of action of lipocalin-2 (LCN2) in OPC differentiation and WMI and identified the receptor SCL22A17 and downstream transcription factor early growth response protein 1 (EGR1) as the key signals contributing to LCN2-mediated insufficient OPC remyelination. In LCN-knockdown and OPC EGR1 conditional-knockout mice, we discovered enhanced OPC differentiation in developing and injured white matter (WM); consistent with this, the specific inactivation of LCN2/SCl22A17/EGR1 signaling promoted remyelination and neurological recovery in both atypical, acute WMI due to subarachnoid hemorrhage and typical, chronic WMI due to multiple sclerosis. This potentially represents a novel strategy to enhance differentiation and remyelination in patients with white matter injury.
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Affiliation(s)
- Qiang Li
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Department of Neurobiology, College of Basic Medical Sciences, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Xufang Ru
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Yang Yang
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Hengli Zhao
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jie Qu
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Weixiang Chen
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Pengyu Pan
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Huaizhen Ruan
- Department of Neurobiology, College of Basic Medical Sciences, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Chaojun Li
- Model Animal Research Center, Nanjing University, Nanjing, 210032, China.
| | - Yujie Chen
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China. .,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China. .,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
| | - Hua Feng
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.,Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
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5
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Morales-Primo AU, Becker I, Zamora-Chimal J. Neutrophil extracellular trap-associated molecules: a review on their immunophysiological and inflammatory roles. Int Rev Immunol 2021; 41:253-274. [PMID: 34036897 DOI: 10.1080/08830185.2021.1921174] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Neutrophil extracellular traps (NETs) are a defense mechanism against pathogens. They are composed of DNA and various proteins and have the ability to hinder microbial spreading and survival. However, NETs are not only related to infections but also participate in sterile inflammatory events. In addition to DNA, NETs contain histones, serine proteases, cytoskeletal proteins and antimicrobial peptides, all of which have immunomodulatory properties that can augment or decrease the inflammatory response. Extracellular localization of these molecules alerts the immune system of cellular damage, which is triggered by recognition of damage-associated molecular patterns (DAMPs) through specific pattern recognition receptors. However, not all of these molecules are DAMPs and may have other immunophysiological properties in the extracellular space. The release of NETs can lead to production of pro-inflammatory cytokines (due to TLR2/4/9 and inflammasome activation), the destruction of the extracellular matrix, activation of serine proteases and of matrix metallopeptidases (MMPs), modulation of cellular proliferation, induction of cellular migration and adhesion, promotion of thrombogenesis and angiogenesis and disruption of epithelial and endothelial permeability. Understanding the dynamics of NET-associated molecules, either individually or synergically, will help to unravel their role in inflammatory events and open novel perspectives for potential therapeutic targets. We here review molecules contained within NETS and their immunophysiological roles.
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Affiliation(s)
- Abraham U Morales-Primo
- Laboratory of Immunoparasitology, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Hospital General de México, Mexico City, Mexico
| | - Ingeborg Becker
- Laboratory of Immunoparasitology, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Hospital General de México, Mexico City, Mexico
| | - Jaime Zamora-Chimal
- Laboratory of Immunoparasitology, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Hospital General de México, Mexico City, Mexico
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6
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Li C, Li Y, Lou L, Han X, Wang H, Huang T, Li C. The interaction between lipocalin 2 and dipyridine ketone hydrazone dithiocarbamte may influence respective function in proliferation and metastasis-related gene expressions in HepG2 cell. J Biol Inorg Chem 2021; 26:123-133. [PMID: 33449164 DOI: 10.1007/s00775-020-01842-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 11/30/2020] [Indexed: 10/22/2022]
Abstract
LCN2 (Lipocalins) was first identified as iron transporter through associating with its siderophores and also involved in many cancer metastases, but its function is still paradoxical. We questioned that whether LCN2 might also associate exogenous iron chelator as does in inherent way and the association may influence their respective function. To address this issue, we investigated the effect of LCN2 on action of DpdtC (2,2'-dipyridine ketone hydrazone dithiocarbamte), an iron chelator in proliferation and metastasis-related gene expression. The results showed that exogenous LCN2 and DpdtC could inhibit growth of HepG2 cells, while the combination treatment enhanced their inhibitory effect both in proliferation and colony formation. This encouraged us to investigate the effect of the interaction on metastasis-related gene expression. The results revealed that both LCN2 and DpdtC impaired the wound healing of HepG2, but the inhibitory effect of DpdtC was significantly enhanced upon association with LCN2. Undergoing epithelium-mesenchymal transition (EMT) is a crucial step for cancer metastasis, LCN2 and DpdtC had opposite effects on EMT markers, the binding of DpdtC to LCN2 significantly weakened the regulation of it (or its iron chelate) on EMT markers. To insight into the interaction between LCN2 and DpdtC-iron, fluorescence titration and molecular docking were performed to obtain the association constant (~ 104 M-1) and thermodynamic parameters (ΔG = - 26.10 kJ/mol). Importantly this study provided evidence that siderophores-loading state of LCN2 may influence its function, which be helpful for understanding the contradictory role of LCN2 in the metastasis of cancer.
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Affiliation(s)
- Cuiping Li
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Yongli Li
- Department of Histology and Embryology, Sanquan College of Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Liying Lou
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Xinyi Han
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Huihui Wang
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Tengfei Huang
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Changzheng Li
- Department of Molecular Biology and Biochemistry, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China. .,Experimental Teaching Center of Biology and Basic Medical Sciences, Sanquan College of Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China.
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7
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Qu W, Jin H, Chen BP, Liu J, Li R, Guo W, Tian H. CPEB3 regulates neuron-specific alternative splicing and involves neurogenesis gene expression. Aging (Albany NY) 2020; 13:2330-2347. [PMID: 33318303 PMCID: PMC7880327 DOI: 10.18632/aging.202259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/27/2020] [Indexed: 12/17/2022]
Abstract
In the mammalian brain, alternative pre-mRNA splicing is a fundamental mechanism that modifies neuronal function dynamically where secretion of different splice variants regulates neurogenesis, development, pathfinding, maintenance, migration, and synaptogenesis. Sequence-specific RNA-Binding Protein CPEB3 has distinctive isoform-distinct biochemical interactions and neuronal development assembly roles. Nonetheless, the mechanisms moderating splice isoform options remain unclear. To establish the modulatory trend of CPEB3, we cloned and excessively expressed CPEB3 in HT22 cells. We used RNA-seq to analyze CPEB3-regulated alternative splicing on control and CPEB3-overexpressing cells. Consequently, we used iRIP-seq to identify CPEB-binding targets. We additionally validated CPEB3-modulated genes using RT-qPCR. CPEB3 overexpression had insignificant effects on gene expression in HT22 cells. Notably, CPEB3 partially modulated differential gene splicing enhanced in the modulation of neural development, neuron cycle, neurotrophin, synapse, and specific development pathway, implying an alternative splicing regulatory mechanism associated with neurogenesis. Moreover, qRT-PCR verified the CPEB3-modulated transcription of neurogenesis genes LCN2 and NAV2, synaptogenesis gene CYLD, as well as neural development gene JADE1. Herein, we established that CPEB3 is a critical modulator of alternative splicing in neurogenesis, which remarkably enhances the current understanding of the CPEB3 mediated alternative pre-mRNA splicing.
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Affiliation(s)
- Wenrui Qu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Hongjuan Jin
- Department of Plastic and Reconstructive Surgery, The First Hospital of Jilin University, Changchun, China
| | - Bing-Peng Chen
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Jun Liu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Rui Li
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Wenlai Guo
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Heng Tian
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, Jilin Province, China
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8
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Chen X, Qiu F, Zhao X, Lu J, Tan X, Xu J, Chen C, Zhang F, Liu C, Qiao D, Wang H. Astrocyte-Derived Lipocalin-2 Is Involved in Mitochondrion-Related Neuronal Apoptosis Induced by Methamphetamine. ACS Chem Neurosci 2020; 11:1102-1116. [PMID: 32186847 DOI: 10.1021/acschemneuro.9b00559] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Methamphetamine (METH) is a widely abused and highly addictive psychoactive stimulant that can induce neuronal apoptosis. Lipocalin-2 (LCN2) is a member of the lipocalin family, and its upregulation is involved in cell death in the adult brain. However, the role of LCN2 in METH-induced neurotoxicity has not been reported. In this study, we found that LCN2 was predominantly expressed in hippocampal astrocytes after METH exposure and that recombinant LCN2 (Re LCN2) can induce neuronal apoptosis in vitro and in vivo. The inhibition of LCN2 and LCN2R, a cell surface receptor for LCN2, reduced METH- and Re LCN2-induced mitochondrion-related neuronal apoptosis in cultures of primary rat neurons and animal models. Our study supports the role of reactive oxygen species (ROS) generation and the PRKR-like ER kinase (PERK)-mediated signaling pathway in the upregulation of astrocyte-derived LCN2 after METH exposure. Additionally, the serum and cerebrospinal fluid (CSF) levels of LCN2 were significantly upregulated after METH exposure. These results indicate that upregulation of astrocyte-derived LCN2 binding to LCN2R is involved in METH-induced mitochondrion-related neuronal apoptosis.
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Affiliation(s)
- Xuebing Chen
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Feng Qiu
- Department of Laboratory Medicine, Nanhai Hospital, Southern Medical University, Foshan, Guangdong 528244, China
| | - Xu Zhao
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Jiancong Lu
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Xiaohui Tan
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Jingtao Xu
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Chuanxiang Chen
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Fu Zhang
- Key Lab of Forensic Pathology, Guangdong Public Security Department, Guangzhou 510050, China
| | - Chao Liu
- Guangzhou Forensic Science Institute, Guangzhou 510030, China
| | - Dongfang Qiao
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
| | - Huijun Wang
- School of Forensic Medicine, Southern Medical University, Guangzhou 510515, China
- Department of Laboratory Medicine, Nanhai Hospital, Southern Medical University, Foshan, Guangdong 528244, China
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9
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Ghosh S, Stepicheva N, Yazdankhah M, Shang P, Watson AM, Hose S, Liu H, Weiss J, Zigler JS, Valapala M, Watkins SC, Sinha D. The role of lipocalin-2 in age-related macular degeneration (AMD). Cell Mol Life Sci 2020; 77:835-851. [PMID: 31901947 PMCID: PMC7079812 DOI: 10.1007/s00018-019-03423-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 12/04/2019] [Accepted: 12/10/2019] [Indexed: 12/21/2022]
Abstract
Lipocalins are a family of secreted adipokines which play important roles in various biological processes. Lipocalin-2 (LCN-2) has been shown to be involved in acute and chronic inflammation. This particular protein is critical in the pathogenesis of several diseases including cancer, diabetes, obesity, and multiple sclerosis. Herein, we discuss the general molecular basis for the involvement of LCN-2 in acute infections and chronic disease progression and also ascertain the probable role of LCN-2 in ocular diseases, particularly in age-related macular degeneration (AMD). We elaborate on the signaling cascades which trigger LCN-2 upregulation in AMD and suggest therapeutic strategies for targeting such pathways.
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Affiliation(s)
- Sayan Ghosh
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA.
| | - Nadezda Stepicheva
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - Meysam Yazdankhah
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - Peng Shang
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - Alan M Watson
- Center for Biologic Imaging and Department of Cellular Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Stacey Hose
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - Haitao Liu
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - Joseph Weiss
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA
| | - J Samuel Zigler
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - Simon C Watkins
- Center for Biologic Imaging and Department of Cellular Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Debasish Sinha
- Department of Ophthalmology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA.
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
- Department of Ophthalmology, Cell Biology and Developmental Biology, Children's Hospital of University of Pittsburgh School of Medicine, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA.
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10
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Lu F, Inoue K, Kato J, Minamishima S, Morisaki H. Functions and regulation of lipocalin-2 in gut-origin sepsis: a narrative review. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2019; 23:269. [PMID: 31375129 PMCID: PMC6679544 DOI: 10.1186/s13054-019-2550-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/22/2019] [Indexed: 12/14/2022]
Abstract
Lipocalin-2 (Lcn2), an innate immune protein, has come to be recognized for its roles in iron homeostasis, infection, and inflammation. In this narrative review, we provide a comprehensive description based on currently available evidence of the clinical implications of Lcn2 and its therapeutic potency in gut-origin sepsis. Lcn2 appears to mitigate gut barrier injury via maintaining homeostasis of the microbiota and exerting antioxidant strategy, as well as by deactivating macrophages and inducing immune cell apoptosis to terminate systemic hyper-inflammation. We propose that development of a therapeutic strategy targeting lipocalin-2 could be highly promising in the management of gut-origin sepsis.
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Affiliation(s)
- Fanglin Lu
- Keio University Graduate School of Medicine Doctoral Programs, Tokyo, Japan.,Department of Anesthesiology, Keio University School of Medicine, 35 Shinanoamchi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kei Inoue
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanoamchi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Jungo Kato
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanoamchi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Shizuka Minamishima
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanoamchi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Hiroshi Morisaki
- Department of Anesthesiology, Keio University School of Medicine, 35 Shinanoamchi, Shinjuku-ku, Tokyo, 160-8582, Japan.
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11
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Channels, transporters and receptors for cadmium and cadmium complexes in eukaryotic cells: myths and facts. Biometals 2019; 32:469-489. [DOI: 10.1007/s10534-019-00176-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 01/21/2019] [Indexed: 12/21/2022]
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12
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Betten R, Scharner B, Probst S, Edemir B, Wolff NA, Langelueddecke C, Lee WK, Thévenod F. Tonicity inversely modulates lipocalin-2 (Lcn2/24p3/NGAL) receptor (SLC22A17) and Lcn2 expression via Wnt/β-catenin signaling in renal inner medullary collecting duct cells: implications for cell fate and bacterial infection. Cell Commun Signal 2018; 16:74. [PMID: 30404645 PMCID: PMC6223074 DOI: 10.1186/s12964-018-0285-3] [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] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 10/18/2018] [Indexed: 02/06/2023] Open
Abstract
Background We have previously evidenced apical expression of the 24p3/NGAL/lipocalin-2 receptor (Lcn2-R; SLC22A17) in inner medullary collecting duct (IMCD) cells, which are present in vivo in a hyperosmotic/-tonic environment that activates canonical Wnt/β-catenin signaling. The localization of Lcn2-R in the inner medulla is intriguing considering local bacterial infections trigger toll-like receptor-4 (TLR-4)-mediated secretion of the bacteriostatic Fe3+-free (apo-)Lcn2. Aim To determine the effects of osmolarity/tonicity changes, Wnt/β-catenin and TLR-4 activation on Lcn2-R and Lcn2 expression and cell viability in rat primary IMCD and mouse (m)IMCD3 cells. Methods Normosmolarity/-tonicity was 300 mosmol/l whereas hyperosmolarity/-tonicity was induced by adding 100 mmol/l NaCl + 100 mmol/l urea (600 mosmol/l, 1-7 days). Lcn2-R and Lcn2 expression were determined by qPCR, immunoblotting, flow cytometry and immunofluorescence microscopy. β-catenin was silenced by RNAi. Cell viability/death was determined with MTT and LDH release assays. TLR-4 was activated by bacterial lipopolysaccharides (LPS). Results Hyperosmotic/-tonic media upregulated Lcn2-R by ~4-fold and decreased Lcn2 expression/secretion, along with Wnt/β-catenin activation, in IMCD cells. These effects of hyperosmotic/-tonic media on Lcn2-R/Lcn2 expression were reverted by normosmolarity/-tonicity, β-catenin silencing and/or LPS. Exposure of cells with endogenous or stably overexpressing Lcn2-R to apo-Lcn2 or LPS decreased cell viability. Conclusions Lcn2-R upregulation and Lcn2 downregulation via Wnt/β-catenin may promote adaptive osmotolerant survival of IMCD cells in response to hyperosmolarity/-tonicity whereas Lcn2 upregulation and Lcn2-R downregulation via TLR-4 and/or normosmolarity/-tonicity may protect IMCD cells against bacterial infections and prevent autocrine death induction by Lcn2. Electronic supplementary material The online version of this article (10.1186/s12964-018-0285-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- R Betten
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - B Scharner
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - S Probst
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - B Edemir
- Department of Medicine, Hematology and Oncology, Martin Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - N A Wolff
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - C Langelueddecke
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - W-K Lee
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany
| | - F Thévenod
- Department of Physiology, Pathophysiology & Toxicology and ZBAF (Centre for Biomedical Education and Research), Faculty of Health, School of Medicine, Witten/Herdecke University, Stockumer Str 12 (Thyssenhaus), D-58453, Witten, Germany.
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13
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De La Chesnaye E, Manuel-Apolinar L, Damasio L, Olivares A, Palomino MA, Santos I, Méndez JP. Expression profiling of lipocalin-2 and 24p3 receptor in murine gonads at different developmental stages. Exp Ther Med 2018; 16:213-221. [PMID: 29896242 PMCID: PMC5995090 DOI: 10.3892/etm.2018.6196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 03/01/2018] [Indexed: 12/02/2022] Open
Abstract
Numerous clinical studies have reported the association between high circulating levels of lipocalin-2 (LCN2) and metabolic diseases. However, only few studies have addressed sexually dimorphic, either in its circulating concentration or in its expression in other organs. To the best of our knowledge, LCN2 and the 24p3 receptor (24p3R), have not been identified in gonads; therefore, the present study analyzed their mRNA expression profile and cellular localization in gonads collected from fetal rats at 21 days post coitum, as well as from neonatal rats at 0, 2, 4, 6, 12, 20 and 30 postnatal days. Semiquantitative polymerase chain reaction and immunohistochemical assays revealed that the LCN2 mRNA during perinatal and pre-pubertal stages presented a sex-specific expression pattern, being higher in ovaries than in testes collected at these stages. Furthermore, the mRNA levels of the long and short isoforms of the 24p3R (507 and 350 bp, respectively), were lower in female gonads from postnatal day 0 onwards in comparison with the levels observed in males, but before birth, the short isoform of the 24p3R was higher in ovaries than in testes. In addition, in females, the abundance of mRNA of this isoform was drastically diminished at 24 h after birth. Furthermore, this specific expression profile of LCN2 and 24p3R at perinatal and prepubertal stages coincides with events of cellular proliferation and apoptosis within both gonads. Immunohistochemical assays revealed that in ovaries, LCN2 and 24p3R are present in germinal and somatic cells of follicles, while in testes, this adipokine and its receptor are only located in germinal cells. These findings suggest that in murine gonads, LCN2/24p3R signaling may be involved either in cell proliferation or cell death driven by gonadotropin-independent or -dependent mechanisms.
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Affiliation(s)
- Elsa De La Chesnaye
- Cardiovascular and Metabolic Diseases Research Unit, Mexican Social Security Institute, México City 06720, México
| | - Leticia Manuel-Apolinar
- Endocrine Research Unit, National Medical Center, Mexican Social Security Institute, México City 06720, México
| | - Leticia Damasio
- Endocrine Research Unit, National Medical Center, Mexican Social Security Institute, México City 06720, México
| | - Aleida Olivares
- Research Unit in Reproductive Medicine, Gyneco-Obstetrics Hospital, Mexican Social Security Institute, México City 01090, México
| | - Miguel Angel Palomino
- Cardiovascular and Metabolic Diseases Research Unit, Mexican Social Security Institute, México City 06720, México
| | - Isis Santos
- Research Unit in Reproductive Medicine, Gyneco-Obstetrics Hospital, Mexican Social Security Institute, México City 01090, México
| | - Juan Pablo Méndez
- Peripheral Obesity Research Unit, Faculty of Medicine, National Autonomous University of Mexico, México City 14000, México
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14
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Ferreira AC, Santos T, Sampaio-Marques B, Novais A, Mesquita SD, Ludovico P, Bernardino L, Correia-Neves M, Sousa N, Palha JA, Sousa JC, Marques F. Lipocalin-2 regulates adult neurogenesis and contextual discriminative behaviours. Mol Psychiatry 2018; 23:1031-1039. [PMID: 28485407 DOI: 10.1038/mp.2017.95] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 03/07/2017] [Accepted: 03/16/2017] [Indexed: 12/24/2022]
Abstract
In the adult mammalian brain, newborn granule cells are continuously integrated into hippocampal circuits, and the fine-tuning of this process is important for hippocampal function. Thus, the identification of factors that control adult neural stem cells (NSCs) maintenance, differentiation and integration is essential. Here we show that the deletion of the iron trafficking protein lipocalin-2 (LCN2) induces deficits in NSCs proliferation and commitment, with impact on the hippocampal-dependent contextual fear discriminative task. Mice deficient in LCN2 present an increase in the NSCs population, as a consequence of a G0/G1 cell cycle arrest induced by increased endogenous oxidative stress. Of notice, supplementation with the iron-chelating agent deferoxamine rescues NSCs oxidative stress, promotes cell cycle progression and improves contextual fear conditioning. LCN2 is, therefore, a novel key modulator of neurogenesis that, through iron, controls NSCs cell cycle progression and death, self-renewal, proliferation and differentiation and, ultimately, hippocampal function.
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Affiliation(s)
- A C Ferreira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - T Santos
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - B Sampaio-Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - A Novais
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - S D Mesquita
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - P Ludovico
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - L Bernardino
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - M Correia-Neves
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - N Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - J A Palha
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - J C Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
| | - F Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal
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15
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Song J, Kim OY. Perspectives in Lipocalin-2: Emerging Biomarker for Medical Diagnosis and Prognosis for Alzheimer's Disease. Clin Nutr Res 2018; 7:1-10. [PMID: 29423384 PMCID: PMC5796918 DOI: 10.7762/cnr.2018.7.1.1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 10/16/2017] [Accepted: 01/08/2018] [Indexed: 01/23/2023] Open
Abstract
Lipocalin-2 (LCN2), a secreted glycoprotein belonging to the lipocalin superfamily was reported to participate in various biological processes including cell migration, cell survival, inflammatory responses, and insulin sensitivity. LCN2 is expressed in the multiple tissues such as kidney, liver, uterus, and bone marrow. The receptors for LCN2 were additionally found in microglia, astrocytes, epithelial cells, and neurons, but the role of LCN2 in the central nervous system (CNS) has not been fully understood yet. Recently, in vitro, in vivo, and clinical studies reported the association between LCN2 and the risk of Alzheimer's disease (AD). Here, we reviewed the significant evidences showing that LCN2 contributes to the onset and progression of AD. It may suggest that the manipulation of LCN2 in the CNS would be a crucial target for regulation of the pathogenesis and risk of AD.
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Affiliation(s)
- Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Gwangju 61469, Korea.,Human Life Research Center, Dong-A University, Busan 49315, Korea
| | - Oh Yoen Kim
- Human Life Research Center, Dong-A University, Busan 49315, Korea.,Department of Food Science and Nutrition, Brain Busan 21 Project, Dong-A University, Busan 49315, Korea
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16
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Costa D, Principi E, Lazzarini E, Descalzi F, Cancedda R, Castagnola P, Tavella S. LCN2 overexpression in bone enhances the hematopoietic compartment via modulation of the bone marrow microenvironment. J Cell Physiol 2017; 232:3077-3087. [PMID: 28004388 DOI: 10.1002/jcp.25755] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/20/2016] [Accepted: 12/20/2016] [Indexed: 12/15/2022]
Abstract
Lipocalin-2 (LCN2) is a member of the lipocalin family whose expression is modulated in several conditions, including cell differentiation, innate immunity, stress, and cancer. Although it is known that it is expressed in bone, its function in this tissue remains poorly studied. To this end, we took advantage of transgenic mice lines that expressed LCN2 driven by a bone specific type I collagen (LCN2-Tg). In the bone marrow (BM) of LCN2-Tg mice we observed an increased number of phenotypically long-term hematopoietic stem cells (LT-HSC) that also displayed a higher proliferation rate compared to wild-type controls (Wt). Furthermore, hematopoietic progenitor cells, obtained from LCN2-Tg BM showed an increased clonogenic capacity compared to those obtained from LCN2-Tg spleen, a higher concentration of serum erythropoietin and a higher number of mature erythrocytes in the peripheral blood of old LCN2-Tg animals compared to aged-matched wt. The findings of a combined increase in the BM of the LCN2-Tg mice of SDF-1, SCF, and TIMP-1 levels along with the reduction of both MMP-9 activity and cathepsin K concentration may explain the observed effects on the HSC compartment. This study shows that LCN2 overexpression in bones modifies the BM microenvironment via modulation of the expression of key secreted factors and cytokines, which in turn regulate the HSC niche behavior enhancing both HSC homing in young mice and erythrocytes production in older mice.
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Affiliation(s)
- Delfina Costa
- Dipartimento di Medicina Sperimentale, Universita' di Genova, Genova, Italy
| | - Elisa Principi
- Dipartimento di Medicina Sperimentale, Universita' di Genova, Genova, Italy
| | - Edoardo Lazzarini
- Dipartimento di Medicina Sperimentale, Universita' di Genova, Genova, Italy
| | - Fiorella Descalzi
- Istituto di Bioimmagini e Fisiologia Molecolare, Consiglio Nazionale delle Ricerche, Genova, Italy
| | - Ranieri Cancedda
- Dipartimento di Medicina Sperimentale, Universita' di Genova, Genova, Italy
| | - Patrizio Castagnola
- IRCCS AOU San Martino-IST, Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
| | - Sara Tavella
- Dipartimento di Medicina Sperimentale, Universita' di Genova, Genova, Italy.,IRCCS AOU San Martino-IST, Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
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17
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Furukawa T, Shimoyama S, Miki Y, Nikaido Y, Koga K, Nakamura K, Wakabayashi K, Ueno S. Chronic diazepam administration increases the expression of Lcn2 in the CNS. Pharmacol Res Perspect 2017; 5:e00283. [PMID: 28596835 PMCID: PMC5461642 DOI: 10.1002/prp2.283] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/03/2016] [Accepted: 11/11/2016] [Indexed: 12/17/2022] Open
Abstract
Benzodiazepines (BZDs), which bind with high affinity to gamma-aminobutyric acid type A receptors (GABAA-Rs) and potentiate the effects of GABA, are widely prescribed for anxiety, insomnia, epileptic discharge, and as anticonvulsants. The long-term use of BZDs is limited due to adverse effects such as tolerance, dependence, withdrawal effects, and impairments in cognition and learning. Additionally, clinical reports have shown that chronic BZD treatment increases the risk of Alzheimer's disease. Unusual GABAA-R subunit expression and GABAA-R phosphorylation are induced by chronic BZD use. However, the gene expression and signaling pathways related to these effects are not completely understood. In this study, we performed a microarray analysis to investigate the mechanisms underlying the effect of chronic BZD administration on gene expression. Diazepam (DZP, a BZD) was chronically administered, and whole transcripts in the brain were analyzed. We found that the mRNA expression levels were significantly affected by chronic DZP administration and that lipocalin 2 (Lcn2) mRNA was the most upregulated gene in the cerebral cortex, hippocampus, and amygdala. Lcn2 is known as an iron homeostasis-associated protein. Immunostained signals of Lcn2 were detected in neuron, astrocyte, microglia, and Lcn2 protein expression levels were consistently upregulated. This upregulation was observed without proinflammatory genes upregulation, and was attenuated by chronic treatment of deferoxamine mesylate (DFO), iron chelator. Our results suggest that chronic DZP administration regulates transcription and upregulates Lcn2 expression levels without an inflammatory response in the mouse brain. Furthermore, the DZP-induced upregulation of Lcn2 expression was influenced by ambient iron.
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Affiliation(s)
- Tomonori Furukawa
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Shuji Shimoyama
- Research Center for Child Mental Development Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Yasuo Miki
- Department of Neuropathology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Yoshikazu Nikaido
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Kohei Koga
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Kazuhiko Nakamura
- Research Center for Child Mental Development Hirosaki University Graduate School of Medicine Hirosaki Japan.,Department of Neuropsychiatry Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Koichi Wakabayashi
- Department of Neuropathology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Shinya Ueno
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan.,Research Center for Child Mental Development Hirosaki University Graduate School of Medicine Hirosaki Japan
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18
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Shishido H, Toyota Y, Hua Y, Keep RF, Xi G. Role of lipocalin 2 in intraventricular haemoglobin-induced brain injury. Stroke Vasc Neurol 2016; 1:37-43. [PMID: 28959462 PMCID: PMC5435192 DOI: 10.1136/svn-2016-000009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 04/12/2016] [Accepted: 04/14/2016] [Indexed: 12/14/2022] Open
Abstract
Objective Our recent studies have shown that blood components, including haemoglobin and iron, contribute to hydrocephalus development and brain injury after intraventricular haemorrhage (IVH). The current study investigated the role of lipocalin 2 (LCN2), a protein involved in iron handling, in the ventricular dilation and neuroinflammation caused by brain injury in a mouse model of IVH. Design Female wild-type (WT) C57BL/6 mice and LCN2-deficient (LCN2−/−) mice had an intraventricular injection of haemoglobin, and control mice received an equivalent amount of saline. MRI was performed presurgery and postsurgery to measure ventricular volume and the brains were used for either immunohistochemistry or western blot. Results Ventricular dilation was observed in WT mice at 24 h after haemoglobin (25 mg/mL, 20 µL) injection (12.5±2.4 vs 8.6±1.5 mm3 in the control, p<0.01). Western blotting showed that LCN2 was significantly upregulated in the periventricular area (p<0.01). LCN2 was mainly expressed in astrocytes, whereas the LCN2 receptor was detected in astrocytes, microglia/macrophages and neurons. Haemoglobin-induced ventricle dilation and glia activation were less in LCN2−/− mice (p<0.01). Injection of high-dose haemoglobin (50 mg/mL) resulted in lower mortality in LCN2−/− mice (27% vs 86% in WT; p<0.05). Conclusions Intraventricular haemoglobin caused LCN2 upregulation and ventricular dilation. Haemoglobin resulted in lower mortality and less ventricular dilation in LCN2−/− mice. These results suggest that LCN2 has a role in haemoglobin-induced brain injury and may be a therapeutic target for IVH.
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Affiliation(s)
- Hajime Shishido
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Yasunori Toyota
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Ya Hua
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Richard F Keep
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Guohua Xi
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
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19
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Tang HC, Chang PC, Chen YC. Iron depletion strategy for targeted cancer therapy: utilizing the dual roles of neutrophil gelatinase-associated lipocalin protein. J Mol Model 2016; 22:32. [PMID: 26757915 DOI: 10.1007/s00894-015-2897-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 12/21/2015] [Indexed: 11/24/2022]
Abstract
Decreasing iron uptake and increasing iron efflux may result in cell death by oxidative inactivation of vital enzymes. Applying the dual function of neutrophil gelatinase-associated lipocalin (NGAL) could achieve the goal of iron depletion in the cancer cells. Tyr106, Lys125 or Lys134 was the key binding site for NGAL protein to sequester iron-chelating siderophores. In this study, we employed all bioactive peptides in peptide databank to dock with the siderophore-binding sites of NGAL protein by virtual screening. In addition, we performed molecular dynamics (MD) simulation to observe the molecular character and structural variation of ligand-protein interaction. Glu-Glu-Lys-Glu (EEKE), Glu-Glu-Asp-Cys-Lys (EEDCK), and Gly-Glu-Glu-Cys-Asp (GEECD) were selected preliminarily by rigorous scoring functions for further investigation. GEECD was excluded due to higher binding total energy than the others. Moreover, we also excluded EEKE due to larger influence to the stability of binding residues by the information of root mean square fluctuation (RMSF) and principal component analysis (PCA). Thus, we suggested that EEDCK was the potential bioactive peptide which had been proved to inhibit malignant cells for targeted cancer therapy. Graphical Abstract Perspective drug design of occupying the siderophore-binding sites of NGAL outside the cell temporarily by a potential short peptide until NGAL enters into the cell, and releasing the siderophore-binding sites inside the cell.
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Affiliation(s)
- Hsin-Chieh Tang
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 41354, Taiwan
| | - Pei-Chun Chang
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 41354, Taiwan
| | - Yu-Chian Chen
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 41354, Taiwan. .,Human Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, 40402, Taiwan. .,Research Center for Chinese Medicine & Acupuncture, China Medical University, Taichung, 40402, Taiwan.
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20
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Vaulont S, Schalk I. [Roles of bacterial and mammalian siderophores in host-pathogen interactions]. Med Sci (Paris) 2015; 31:756-63. [PMID: 26340835 DOI: 10.1051/medsci/20153108014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Iron is an essential nutriment for almost all forms of life, from bacteria to humans. Despite its key role in living organisms, iron becomes toxic at high concentrations. In the body, to circumvent this toxicity, almost all the intracellular iron is bound to proteins (especially to ferritin, a protein able to bind up to 4000 atoms of iron) and a small proportion (0.2% to 3%) to low molecular weight ligands (less than 2 kDa) constituting a free iron pool able to ensure the traffic of intracellular iron. A number of small molecules (citrate, phosphate, phospholipid, polypeptide) able to chelate iron, with variable affinities, have been known for a long time. In 2010, two teams have identified new mammal endogen chelators able to bind iron with similar chemical properties as bacterial siderophores. Recently, a few publications emphasized that most of the free iron present in the body cells is indeed linked to these siderophores, which play a key role in infected-host protection mechanisms during bacterial infections, through iron homeostasis and oxidative stress regulation.
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Affiliation(s)
- Sophie Vaulont
- Inserm U1016, institut Cochin, 24, rue du Faubourg Saint-Jacques, 75014 Paris, France - CNRS, UMR8104, Paris, France - Université Paris Descartes, Sorbonne Paris Cité, Paris, France - Laboratory of excellence GR-Ex
| | - Isabelle Schalk
- UMR 7242, université de Strasbourg-CNRS, ESBS, Strasbourg, France - CNRS, UMR 7242, ESBS, Illkirch, France
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Ferreira AC, Dá Mesquita S, Sousa JC, Correia-Neves M, Sousa N, Palha JA, Marques F. From the periphery to the brain: Lipocalin-2, a friend or foe? Prog Neurobiol 2015; 131:120-36. [PMID: 26159707 DOI: 10.1016/j.pneurobio.2015.06.005] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 06/23/2015] [Accepted: 06/28/2015] [Indexed: 01/08/2023]
Abstract
Lipocalin-2 (LCN2) is an acute-phase protein that, by binding to iron-loaded siderophores, acts as a potent bacteriostatic agent in the iron-depletion strategy of the immune system to control pathogens. The recent identification of a mammalian siderophore also suggests a physiological role for LCN2 in iron homeostasis, specifically in iron delivery to cells via a transferrin-independent mechanism. LCN2 participates, as well, in a variety of cellular processes, including cell proliferation, cell differentiation and apoptosis, and has been mostly found up-regulated in various tissues and under inflammatory states, being its expression regulated by several inducers. In the central nervous system less is known about the processes involving LCN2, namely by which cells it is produced/secreted, and its impact on cell proliferation and death, or in neuronal plasticity and behaviour. Importantly, LCN2 recently emerged as a potential clinical biomarker in multiple sclerosis and in ageing-related cognitive decline. Still, there are conflicting views on the role of LCN2 in pathophysiological processes, with some studies pointing to its neurodeleterious effects, while others indicate neuroprotection. Herein, these various perspectives are reviewed and a comprehensive and cohesive view of the general function of LCN2, particularly in the brain, is provided.
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Affiliation(s)
- Ana C Ferreira
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Sandro Dá Mesquita
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João C Sousa
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Margarida Correia-Neves
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana A Palha
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Fernanda Marques
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Xiong H, Luo T, He W, Xi D, Lu H, Li M, Liu J, Guo Z. Up-regulation of miR-138 inhibits hypoxia-induced cardiomyocyte apoptosis via down-regulating lipocalin-2 expression. Exp Biol Med (Maywood) 2015; 241:25-30. [PMID: 26129883 DOI: 10.1177/1535370215591831] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/12/2015] [Indexed: 11/17/2022] Open
Abstract
Hypoxia-induced cardiomyocyte apoptosis contributes significantly to the development of numerous cardiac diseases, such as ischemic heart disease, heart failure, etc. Promoting cell survival by inhibiting apoptosis is one of the available strategies to attenuate cardiac dysfunction caused by cardiomyocyte loss. Previous studies have been demonstrated that miR-138 and lipocalin-2 (Lcn2) play important roles in cardiomyocyte apoptosis and survival. We presently determined whether Lcn2 is a target gene of miR-138 involved in hypoxia-induced cardiomyocyte apoptosis. Firstly, mimics of miR-138 were transfected into HL-1 cells to investigate its effect on cell apoptosis. Using 3-(4,5-dimethyl-thiazol-2-y1) 2,5-diphenyl tetrazolium bromide (MTT) and Annexin V-FITC/PI flow cytometer assays, over-expression of miR-138 significantly enhanced the cell growth and significantly attenuated the cell apoptosis in hypoxic conditions. Dual-luciferase reporter gene and western blot results confirmed Lcn2 was a direct target of miR-138. Then, the recombinant plasmid, pcDNA3.1/Lcn2 was transfected into the HL-1 cells that over-expressed miR-138. We further observed that the over-expression of Lcn2 diminished the protection of miR-138 over-expression from hypoxia-induced cell survival and apoptosis. In conclusion, our study demonstrated that up-regulation of miR-138 inhibits the hypoxia-induced cardiomyocyte apoptosis via down-regulating the pro-apoptotic gene expression of Lcn2.
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Affiliation(s)
- Haowei Xiong
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Tiantian Luo
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Wenshuai He
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Dan Xi
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Hao Lu
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Menghao Li
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Jichen Liu
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Zhigang Guo
- Division of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
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Chia WJ, Tan FCK, Ong WY, Dawe GS. Expression and localisation of brain-type organic cation transporter (BOCT/24p3R/LCN2R) in the normal rat hippocampus and after kainate-induced excitotoxicity. Neurochem Int 2015; 87:43-59. [PMID: 26004810 DOI: 10.1016/j.neuint.2015.04.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/06/2015] [Accepted: 04/14/2015] [Indexed: 01/13/2023]
Abstract
The iron siderophore binding protein lipocalin 2 (LCN2, also known as 24p3, NGAL and siderocalin) may be involved in iron homeostasis, but to date, little is known about expression of its putative receptor, brain-type organic cation transporter (BOCT, also known as BOCT1, 24p3R, NGALR and LCN2R), in the brain during neurodegeneration. The present study was carried out to elucidate the expression of LCN2 and BOCT in hippocampus after excitotoxicity induced by the glutamate analog, kainate (KA) and a possible role of LCN2 in neuronal injury. As reported previously, a rapid and sustained induction in expression of LCN2 was found in the hippocampus after intracerebroventicular injection of KA. BOCT was expressed in neurons of the saline-injected control hippocampus, and immunolabel for BOCT protein was preserved in pyramidal neurons of CA1 at 1 day post-KA injection, likely due to the delayed onset of neurodegeneration after KA injection. At 3 days and 2 weeks after KA injections, loss of immunolabel was observed due to degenerated neurons, although remaining neurons continued to express BOCT, and induction of BOCT was found in OX-42 positive microglia. This resulted in an overall decrease in BOCT mRNA and protein expression after KA treatment. Increased expression of the pro-apoptotic marker, Bim, was found in both neurons and microglia after KA injection, but TUNEL staining indicating apoptosis was found primarily in Bim-expressing neurons, but not microglia. Interaction between LCN2 and BOCT was found by DuoLink assay in cultured hippocampal neurons. Apo-LCN2 without iron caused no significant differences in neuronal Bim expression or cell survival, whereas holo-LCN2 consisting of LCN2:iron:enterochelin complex increased Bim mRNA expression and decreased neuronal survival. Together, results suggest that LCN2 and BOCT may have a role in neuronal injury.
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Affiliation(s)
- Wan-Jie Chia
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, 10 Medical Drive, Singapore 117597; National University of Singapore Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456; Neurobiology and Ageing Programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456
| | - Francis Chee Kuan Tan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, 10 Medical Drive, Singapore 117597; Neurobiology and Ageing Programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456; Singapore Institute for Neurotechnology (SINAPSE), Centre for Life Sciences, 28 Medical Drive, Singapore 117456
| | - Wei-Yi Ong
- Neurobiology and Ageing Programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456; Department of Anatomy, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, 4 Medical Drive, Singapore 117597.
| | - Gavin S Dawe
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, 10 Medical Drive, Singapore 117597; National University of Singapore Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456; Neurobiology and Ageing Programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456; Singapore Institute for Neurotechnology (SINAPSE), Centre for Life Sciences, 28 Medical Drive, Singapore 117456.
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24
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Diverse functional roles of lipocalin-2 in the central nervous system. Neurosci Biobehav Rev 2015; 49:135-56. [DOI: 10.1016/j.neubiorev.2014.12.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 11/28/2014] [Accepted: 12/04/2014] [Indexed: 12/16/2022]
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25
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26
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Scotece M, Conde J, Abella V, López V, Pino J, Lago F, Gómez-Reino JJ, Gualillo O. Bone metabolism and adipokines: are there perspectives for bone diseases drug discovery? Expert Opin Drug Discov 2014; 9:945-57. [PMID: 24857197 DOI: 10.1517/17460441.2014.922539] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Over the past 20 years, the idea that white adipose tissue (WAT) is simply an energy depot organ has been radically changed. Indeed, present understanding suggests WAT to be an endocrine organ capable of producing and secreting a wide variety of proteins termed adipokines. These adipokines appear to be relevant factors involved in a number of different functions, including metabolism, immune response, inflammation and bone metabolism. AREAS COVERED In this review, the authors focus on the effects of several adipose tissue-derived factors in bone pathophysiology. They also consider how the modification of the adipokine network could potentially lead to promising treatment options for bone diseases. EXPERT OPINION There are currently substantial developments being made in the understanding of the interplay between bone metabolism and the metabolic system. These insights could potentially lead to the development of new treatment strategies and interventions with the aim of successful outcomes in many people affected by bone disorders. Specifically, future research should look into the intimate mechanisms regulating peripheral and central activity of adipokines as it has potential for novel drug discovery.
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Affiliation(s)
- Morena Scotece
- Santiago University Clinical Hospital, SERGAS, Division of Rheumatology, Research Laboratory 9 , Santiago de Compostela, 15706 , Spain
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27
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Adipokines as drug targets in joint and bone disease. Drug Discov Today 2014; 19:241-58. [DOI: 10.1016/j.drudis.2013.07.012] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/09/2013] [Accepted: 07/18/2013] [Indexed: 02/07/2023]
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28
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Costa D, Lazzarini E, Canciani B, Giuliani A, Spanò R, Marozzi K, Manescu A, Cancedda R, Tavella S. Altered bone development and turnover in transgenic mice over-expressing lipocalin-2 in bone. J Cell Physiol 2013; 228:2210-21. [PMID: 23606520 DOI: 10.1002/jcp.24391] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 04/10/2013] [Indexed: 11/06/2022]
Abstract
Lipocalin-2 (LCN2) is a protein largely expressed in many tissues, associated with different biological phenomena such as cellular differentiation, inflammation and cancer acting as a survival/apoptotic signal. We found that LCN2 was expressed during osteoblast differentiation and we generated transgenic (Tg) mice over-expressing LCN2 in bone. Tg mice were smaller and presented bone microarchitectural changes in both endochondral and intramembranous bones. In particular, Tg bones displayed a thinner layer of cortical bone and a decreased trabecular number. Osteoblast bone matrix deposition was reduced and osteoblast differentiation was slowed-down. Differences were also observed in the growth plate of young transgenic mice where chondrocyte displayed a more immature phenotype and a lower proliferation rate. In bone marrow cell cultures from transgenic mice, the number of osteoclast progenitors was increased whereas in vivo it was increased the number of mature osteoclasts expressing tartrate-resistant acid phosphatase (TRAP). Finally, while osteoprotegerin (OPG) levels remained unchanged, the expression of the conventional receptor activator of nuclear factor-κB ligand (RANKL) and of the IL-6 was enhanced in Tg mice. In conclusion, we found that LCN2 plays a role in bone development and turnover having both a negative effect on bone formation, by affecting growth plate development and interfering with osteoblast differentiation, and a positive effect on bone resorption by enhancing osteoclast compartment.
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Affiliation(s)
- Delfina Costa
- Dipartimento di Medicina Sperimentale, Universita' di Genova & IRCCS AOU San Martino-IST, Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
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Abstract
PURPOSE OF REVIEW Acute kidney injury (AKI) is a major clinical problem in hospitalized patients. Effective treatment and early diagnosis of this syndrome are not currently available. This review focuses on recent studies examining the biological characteristics and the diagnostic and prognostic value of a novel biomarker--neutrophil gelatinase-associated lipocalin (NGAL)--in the two major patient populations at risk for AKI. RECENT FINDINGS NGAL is one of the most intensively investigated novel renal biomarkers with promising data from animal experiments and clinical studies comprising more than 3500 cardiac surgery or critically ill patients. NGAL was discovered using unbiased transcriptomic approaches and was identified as the gene with the earliest and highest rise of mRNA and protein concentration in renal tissue, urine and plasma following various renal insults. Within minutes to a few hours after a renal insult, NGAL is induced in and released from the injured distal nephron. The average sensitivity and specificity of NGAL--measured 1-3 days prior to current AKI consensus diagnosis--was 76 and 77% respectively for cardiac surgery patients and 73 and 80% respectively for patients admitted to the intensive care unit. SUMMARY NGAL appears to fulfill many characteristics of an appropriate 'real-time' biomarker for AKI detection.
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Ferreira AC, Pinto V, Dá Mesquita S, Novais A, Sousa JC, Correia-Neves M, Sousa N, Palha JA, Marques F. Lipocalin-2 is involved in emotional behaviors and cognitive function. Front Cell Neurosci 2013; 7:122. [PMID: 23908604 PMCID: PMC3725407 DOI: 10.3389/fncel.2013.00122] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/11/2013] [Indexed: 11/13/2022] Open
Abstract
Lipocalin-2 (LCN2), an iron-related protein well described to participate in the innate immune response, has been shown to modulate spine morphology and to regulate neuronal excitability. In accordance, LCN2-null mice are reported to have stress-induced anxiety. Here we show that, under standard housing conditions, LCN2-null mice display anxious and depressive-like behaviors, as well as cognitive impairment in spatial learning tasks. These behavioral alterations were associated with a hyperactivation of the hypothalamic-pituitary-adrenal axis and with an altered brain cytoarchitecture in the hippocampus. More specifically, we found that the granular and pyramidal neurons of the ventral hippocampus, a region described to be associated with emotion, were hypertrophic, while neurons from the dorsal hippocampus, a region implicated in memory and cognition, were atrophic. In addition, LCN2-null mice presented synaptic impairment in hippocampal long-term potentiation. Whether the LCN2 effects are mediated through modulation of the level of corticosteroids or through a novel mechanism, the present observations bring further into light this immune-related protein as a player in the fine-tuning of behavior and of synaptic activity.
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Affiliation(s)
- Ana C Ferreira
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho Braga, Portugal ; ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
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Cairo G, Bernuzzi F, Recalcati S. A precious metal: Iron, an essential nutrient for all cells. GENES AND NUTRITION 2012; 1:25-39. [PMID: 18850218 DOI: 10.1007/bf02829934] [Citation(s) in RCA: 177] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Accepted: 02/22/2006] [Indexed: 12/21/2022]
Abstract
Iron is an important cofactor required for a number of essential cell functions and hence is a vital nutrient. However, iron can also be dangerous as a catalyst of free radical reactions. Accordingly, intracellular iron homeostasis and body iron balance are tightly regulated. In this review, we presented an overview of the remarkable new insights that over the last years have been gained into the multifaceted and sophisticated molecular mechanisms controlling iron acquisition, storage and release. We also reviewed the data about nutrition-related abnormalities of iron metabolism, such as iron overload and deficiency. Finally, we discussed how pathogenic microorganisms and host cells compete for iron, a battle whose outcome has a relevant role in infectious disease.
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Affiliation(s)
- G Cairo
- Institute of General Pathology Generale, Università di Milano, Via Mangiagalli 31, 20133, Milan, Italy,
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Suk K. Proteomic analysis of glioma chemoresistance. Curr Neuropharmacol 2012; 10:72-9. [PMID: 22942880 PMCID: PMC3286849 DOI: 10.2174/157015912799362733] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 06/09/2011] [Accepted: 06/24/2011] [Indexed: 12/16/2022] Open
Abstract
Malignant glioma is the most common and destructive form of primary brain tumor. Along with surgery and radiation, chemotherapy remains as the major treatment modality. The emergence of drug resistance, however, often leads to a therapeutic failure in the treatment of glioma, precluding long-term survival of the patients. A proteomic approach has recently been adapted for the mechanistic analysis of glioma drug resistance. The proteomic analysis of drug-resistant glioma led to the discovery of novel biomarkers that can be used for the prognosis of glioma as well as for monitoring the drug response or resistance of glioma. These proteomics-based biomarkers can also be a druggable target that one can exploit for successful glioma chemotherapy. In this review, recent reports on proteomic analysis of glioma from the perspective of chemoresistance are discussed with a focus on the proteome profiles of glioma cells that are resistant to the alkylating agent, 1, 3-bis (2-chloroethyl)-1-nitrosourea (BCNU), as a prime example. Among numerous proteins that were up- or down-regulated in drug-resistant glioma cells, lipocalin 2 (LCN2) and integrin β3 (ITGB3) were identified as key proteins that determine the survival and death of glioma cells. LCN2, ITGB3, and other proteins identified by proteomic analysis could be utilized to overcome glioma chemoresistance.
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Affiliation(s)
- Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, Kyungpook National University School of Medicine, Daegu, Korea
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Marques F, Mesquita SD, Sousa JC, Coppola G, Gao F, Geschwind DH, Columba-Cabezas S, Aloisi F, Degn M, Cerqueira JJ, Sousa N, Correia-Neves M, Palha JA. Lipocalin 2 is present in the EAE brain and is modulated by natalizumab. Front Cell Neurosci 2012; 6:33. [PMID: 22907989 PMCID: PMC3414908 DOI: 10.3389/fncel.2012.00033] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 07/24/2012] [Indexed: 11/18/2022] Open
Abstract
Multiple sclerosis (MS) is a demyelinating disease that causes major neurological disability in young adults. A definitive diagnosis at the time of the first episode is still lacking, but since early treatment leads to better prognosis, the search for early biomarkers is needed. Here we characterized the transcriptome of the choroid plexus (CP), which is part of the blood-brain barriers (BBBs) and the major site of cerebrospinal fluid production, in the experimental autoimmune encephalomyelitis (EAE) mouse model of MS. In addition, cerebrospinal fluid samples from two cohorts of patients with MS and with optic neuritis (ON) were analyzed to confirm the clinical relevance of the findings. Genes encoding for adhesion molecules, chemokines and cytokines displayed the most altered expression, supporting the role of CP as a site of immune-brain interaction in MS. The gene encoding for lipocalin 2 was the most up-regulated; notably, the cerebrospinal fluid lipocalin 2 levels coincided with the active phases of the disease. Immunostaining revealed that neutrophils infiltrating the CP were the source of the increased lipocalin 2 expression in this structure. However, within the brain, lipocalin 2 was also detected in astrocytes, particularly in regions typically affected in patients with MS. The increase of lipocalin 2 in the cerebrospinal fluid and in astrocytes was reverted by natalizumab treatment. Most importantly, the results obtained in the murine model were translatable into humans since patients from two different cohorts presented increased cerebrospinal fluid lipocalin 2 levels. The findings support lipocalin 2 as a valuable molecule for the diagnostic/monitoring panel of MS.
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Affiliation(s)
- Fernanda Marques
- School of Health Sciences, Life and Health Sciences Research Institute (ICVS), University of Minho Braga, Portugal
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Pantopoulos K, Porwal SK, Tartakoff A, Devireddy L. Mechanisms of mammalian iron homeostasis. Biochemistry 2012; 51:5705-24. [PMID: 22703180 DOI: 10.1021/bi300752r] [Citation(s) in RCA: 385] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Iron is vital for almost all organisms because of its ability to donate and accept electrons with relative ease. It serves as a cofactor for many proteins and enzymes necessary for oxygen and energy metabolism, as well as for several other essential processes. Mammalian cells utilize multiple mechanisms to acquire iron. Disruption of iron homeostasis is associated with various human diseases: iron deficiency resulting from defects in the acquisition or distribution of the metal causes anemia, whereas iron surfeit resulting from excessive iron absorption or defective utilization causes abnormal tissue iron deposition, leading to oxidative damage. Mammals utilize distinct mechanisms to regulate iron homeostasis at the systemic and cellular levels. These involve the hormone hepcidin and iron regulatory proteins, which collectively ensure iron balance. This review outlines recent advances in iron regulatory pathways as well as in mechanisms underlying intracellular iron trafficking, an important but less studied area of mammalian iron homeostasis.
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Affiliation(s)
- Kostas Pantopoulos
- Lady Davis Institute for Medical Research, Jewish General Hospital and Department of Medicine, McGill University, Montreal, QC, Canada
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Mir SUR, Jin L, Craven RJ. Neutrophil gelatinase-associated lipocalin (NGAL) expression is dependent on the tumor-associated sigma-2 receptor S2RPgrmc1. J Biol Chem 2012; 287:14494-501. [PMID: 22418433 DOI: 10.1074/jbc.m111.324921] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Tumor invasion is a critical step in the spread of cancer. S2R (sigma-2 receptor)/Pgrmc1 (progesterone receptor membrane component 1) is a cytochrome b(5)-related drug-binding orphan receptor essential for tumor formation and invasion. Secretory proteins drive these processes, so we screened for S2R(Pgrmc1)-dependent secreted proteins using antibody arrays. S2R(Pgrmc1) markedly regulated the expression of NGAL/LCN2 (neutrophil gelatinase-associated lipocalin/lipocalin 2), a secreted glycoprotein that binds to MMP-9 (matrix metalloproteinase 9) and protects it from degradation. S2R(Pgrmc1) knock-down blocked NGAL/LCN2 expression at the protein and RNA levels and decreased MMP9 activity. NGAL expression was required for MMP-9 activity and tumor formation. S2R(Pgrmc1) associates with EGFR and increases EGFR levels at the plasma membrane, and the EGFR inhibitors erlotinib and AG1478, as well as Akt and ERK inhibitors, suppressed the NGAL/LCN2 RNA and protein levels. NGAL is transcriptionally regulated by NFκB, and S2R(Pgrmc1) knock-down decreased the NFκB subunit p65/RelA acetylation, phosphorylation, and activation. In S2R(Pgrmc1) knock-down cells, p65 acetylation was reversed by inhibitors of histone deacetylase 1, and the inhibitors partially restored NGAL levels. Our results are consistent with a model in which S2R(Pgrmc1) increases NGAL/LCN2 levels by activating NFκB via EGFR.
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Affiliation(s)
- Shakeel U R Mir
- Department of Molecular and Biomedical Pharmacology, Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
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ZOU GY, JI CN, SHEN Q, XUE JL, CHEN JZ. FHC Interacts With Bim and Protects Cell From Apoptosis*. PROG BIOCHEM BIOPHYS 2011. [DOI: 10.3724/sp.j.1206.2010.00608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ip JPK, Noçon AL, Hofer MJ, Lim SL, Müller M, Campbell IL. Lipocalin 2 in the central nervous system host response to systemic lipopolysaccharide administration. J Neuroinflammation 2011; 8:124. [PMID: 21943033 PMCID: PMC3192694 DOI: 10.1186/1742-2094-8-124] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 09/26/2011] [Indexed: 12/11/2022] Open
Abstract
Background Lipocalin 2 (Lcn2) is a bacteriostatic factor that may also modulate cellular function, however, little is known concerning the expression or role of Lcn2 in CNS inflammation. Therefore, here we investigated the regulation and possible function of Lcn2 in the CNS following peripheral lipopolysaccharide (LPS) injection in mice. Methods A murine model for systemic endotoxemia was used in this study. Wild type or Lcn2 KO mice (both genotypes C57BL/6 strain) were given either a single or dual, staggered intraperitoneal injections of purified E. coli LPS or vehicle alone. The brain was examined for the expression and location of Lcn2 mRNA and protein and various markers for neuroinflammation were analyzed. Results Although undetectable under physiological conditions, both Lcn2 mRNA and protein were induced to high levels in the brain after LPS injection. By contrast, RNA corresponding to the putative Lcn2 (termed 24p3R) receptor was present at high levels in the normal brain and remained unaltered by LPS injection. Differences between Lcn2 and 24p3R mRNA expression were found at the anatomic and cellular level. Endothelial cells, microglia and the choroid plexus but not neurons were identified as the main cellular sources for Lcn2 mRNA in the CNS. By contrast, 24p3R mRNA was detected in neurons and the choroid plexus only. Lcn2 protein was found to have a similar cellular localization as the corresponding RNA transcripts with the exception that subsets of neurons were also strongly positive. Various inflammatory, glial, and iron handling markers were analyzed and found to have similar alterations between WT and Lcn2 KO animals. Conclusions 1) Lcn2 production is strongly induced in the CNS by systemic LPS injection, 2) in addition to Lcn2 production at key gateways of bacterial entry to the CNS, neurons may be a target for the actions of Lcn2, which is apparently taken up by these cells, and 3) the cellular functions of Lcn2 in the CNS remain enigmatic.
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Affiliation(s)
- Jacque P K Ip
- School of Molecular Bioscience and Bosch Institute, The University of Sydney, Sydney, Australia
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Abstract
My laboratory has been interested for some time in the influence of iron, a nutrient that is essential for both microbial pathogens and their mammalian hosts, on the course of infectious disease. Our studies indicate that alterations in the expression of host molecules that sequester or transport iron can have direct effects on pathogen growth and can also have an impact on the ability to mount normal immune responses. We have elucidated the mechanistic basis for some of these observations, and have started to apply our findings in strategies to control abnormalities of inflammation and iron metabolism. I will review here what we have learned about the interactions between iron and immunity and discuss the implications of the information that we have acquired.
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Affiliation(s)
- Bobby J Cherayil
- Mucosal Immunology Laboratory, MassGeneral Hospital for Children, Charlestown, MA 02129, USA.
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Expression and localization of the iron-siderophore binding protein lipocalin 2 in the normal rat brain and after kainate-induced excitotoxicity. Neurochem Int 2011; 59:591-9. [PMID: 21683107 DOI: 10.1016/j.neuint.2011.04.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 02/18/2011] [Accepted: 04/04/2011] [Indexed: 12/21/2022]
Abstract
Lipocalin 2 (LCN2) is produced by mammalian hosts to bind bacterial siderophore and sequester free iron as part of an innate immune response, and could also play a role in tissue iron homeostasis, but thus far, little is known about its expression in the CNS. The present study was carried out to study the expression of the lipocalin in the normal rat brain and after neuronal injury induced by kainate (KA). Low levels of LCN2 mRNA and protein expression were detected in most regions of the normal brain except the olfactory bulb, brainstem and cerebellum. KA lesions resulted in damage to the hippocampus, leading to an early increase at three days and a sustained elevation in LCN2 mRNA level of 16-fold, and protein expression at 80-fold in the lesioned tissue compared to controls at 2 weeks post-KA injection. The sustained elevation in mRNA expression was not detected among other lipocalins surveyed using real-time RT-PCR - apoD, PGDS, Rbp4 and LCN5. Single and double immunostaining confirmed that LCN2 is present in astrocytes in the olfactory bulb, brainstem and cerebellum of the normal brain, and reactive astrocytes in the KA-lesioned hippocampus. In conclusion, the present study showed LCN2 to be present in select brain regions, and is upregulated in astrocytes after neuronal injury induced by kainate. We postulate that, as in the periphery, LCN2 may have a role in iron transport or trafficking in the CNS.
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Iron traffics in circulation bound to a siderocalin (Ngal)-catechol complex. Nat Chem Biol 2010; 6:602-9. [PMID: 20581821 PMCID: PMC2907470 DOI: 10.1038/nchembio.402] [Citation(s) in RCA: 241] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 05/27/2010] [Indexed: 02/06/2023]
Abstract
The lipocalins are secreted proteins that bind small organic molecules. Scn-Ngal (also known as neutrophil gelatinase associated lipocalin, siderocalin, lipocalin 2) sequesters bacterial iron chelators, called siderophores, and consequently blocks bacterial growth. However, Scn-Ngal is also prominently expressed in aseptic diseases, implying that it binds additional ligands and serves additional functions. Using chemical screens, crystallography and fluorescence methods, we report that Scn-Ngal binds iron together with a small metabolic product called catechol. The formation of the complex blocked the reactivity of iron and permitted its transport once introduced into circulation in vivo. Scn-Ngal then recycled its iron in endosomes by a pH-sensitive mechanism. As catechols derive from bacterial and mammalian metabolism of dietary compounds, the Scn-Ngal-catechol-Fe(III) complex represents an unforeseen microbial-host interaction, which mimics Scn-Ngal-siderophore interactions but instead traffics iron in aseptic tissues. These results identify an endogenous siderophore, which may link the disparate roles of Scn-Ngal in different diseases.
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Ding L, Hanawa H, Ota Y, Hasegawa G, Hao K, Asami F, Watanabe R, Yoshida T, Toba K, Yoshida K, Ogura M, Kodama M, Aizawa Y. Lipocalin-2/neutrophil gelatinase-B associated lipocalin is strongly induced in hearts of rats with autoimmune myocarditis and in human myocarditis. Circ J 2010; 74:523-30. [PMID: 20057160 DOI: 10.1253/circj.cj-09-0485] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Lipocalin-2/neutrophil gelatinase-B associated lipocalin (Lcn2/NGAL) is involved in the transport of iron and seems to play an important role in inflammation. A recent study has reported that it is also expressed in the failing heart and may be a biomarker not only for renal failure but also for heart failure. Because Lcn2/NGAL is thought to be induced by interleukin-1, it might be strongly induced in the presence of myocarditis. METHODS AND RESULTS This study investigated the expression of Lcn2/NGAL in rat experimental autoimmune myocarditis (EAM) and in human myocarditis. In EAM hearts, the expression of Lcn2/NGAL was markedly increased (>100-fold at an early stage), and in human myocarditis it was also highly expressed compared with non-inflammatory failing hearts. Lcn2/NGAL expressing cells in hearts with EAM and human myocarditis were identified as cardiomyocytes, vascular wall cells, fibroblasts and neutrophils. Lcn2/NGAL in EAM rats was also expressed in the liver. Plasma Lcn2/NGAL levels abruptly increased at an early stage of EAM, and high levels were initially sustained during the inflammatory stage, then decreased with recovery. In contrast, levels of B-type natriuretic peptide increased only slowly as the disease progressed. CONCLUSIONS Cardiomyocytes, vascular wall cells and fibroblasts in myocarditis strongly express Lcn2/NGAL via proinflammatory cytokines.
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Affiliation(s)
- Limin Ding
- Division of Cardiology, Niigata University Graduate School of Medical and Dental Sciences, Japan
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Kell DB. Iron behaving badly: inappropriate iron chelation as a major contributor to the aetiology of vascular and other progressive inflammatory and degenerative diseases. BMC Med Genomics 2009; 2:2. [PMID: 19133145 PMCID: PMC2672098 DOI: 10.1186/1755-8794-2-2] [Citation(s) in RCA: 359] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 01/08/2009] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The production of peroxide and superoxide is an inevitable consequence of aerobic metabolism, and while these particular 'reactive oxygen species' (ROSs) can exhibit a number of biological effects, they are not of themselves excessively reactive and thus they are not especially damaging at physiological concentrations. However, their reactions with poorly liganded iron species can lead to the catalytic production of the very reactive and dangerous hydroxyl radical, which is exceptionally damaging, and a major cause of chronic inflammation. REVIEW We review the considerable and wide-ranging evidence for the involvement of this combination of (su)peroxide and poorly liganded iron in a large number of physiological and indeed pathological processes and inflammatory disorders, especially those involving the progressive degradation of cellular and organismal performance. These diseases share a great many similarities and thus might be considered to have a common cause (i.e. iron-catalysed free radical and especially hydroxyl radical generation).The studies reviewed include those focused on a series of cardiovascular, metabolic and neurological diseases, where iron can be found at the sites of plaques and lesions, as well as studies showing the significance of iron to aging and longevity. The effective chelation of iron by natural or synthetic ligands is thus of major physiological (and potentially therapeutic) importance. As systems properties, we need to recognise that physiological observables have multiple molecular causes, and studying them in isolation leads to inconsistent patterns of apparent causality when it is the simultaneous combination of multiple factors that is responsible.This explains, for instance, the decidedly mixed effects of antioxidants that have been observed, since in some circumstances (especially the presence of poorly liganded iron) molecules that are nominally antioxidants can actually act as pro-oxidants. The reduction of redox stress thus requires suitable levels of both antioxidants and effective iron chelators. Some polyphenolic antioxidants may serve both roles.Understanding the exact speciation and liganding of iron in all its states is thus crucial to separating its various pro- and anti-inflammatory activities. Redox stress, innate immunity and pro- (and some anti-)inflammatory cytokines are linked in particular via signalling pathways involving NF-kappaB and p38, with the oxidative roles of iron here seemingly involved upstream of the IkappaB kinase (IKK) reaction. In a number of cases it is possible to identify mechanisms by which ROSs and poorly liganded iron act synergistically and autocatalytically, leading to 'runaway' reactions that are hard to control unless one tackles multiple sites of action simultaneously. Some molecules such as statins and erythropoietin, not traditionally associated with anti-inflammatory activity, do indeed have 'pleiotropic' anti-inflammatory effects that may be of benefit here. CONCLUSION Overall we argue, by synthesising a widely dispersed literature, that the role of poorly liganded iron has been rather underappreciated in the past, and that in combination with peroxide and superoxide its activity underpins the behaviour of a great many physiological processes that degrade over time. Understanding these requires an integrative, systems-level approach that may lead to novel therapeutic targets.
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Affiliation(s)
- Douglas B Kell
- School of Chemistry and Manchester Interdisciplinary Biocentre, The University of Manchester, 131 Princess St, Manchester, M1 7DN, UK.
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Vinuesa E, Sola A, Jung M, Alfaro V, Hotter G. Lipocalin-2-induced renal regeneration depends on cytokines. Am J Physiol Renal Physiol 2008; 295:F1554-62. [DOI: 10.1152/ajprenal.90250.2008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study investigated whether the renal regeneration occurring in the recovery phase of kidney ischemia-reperfusion (I/R) is mediated by endogenously generated lipocalin-2 (Lcn2). A second objective was to examine whether Lcn2-mediated cell effects could be regulated by the inflammatory cytokines in the environment through their action on Lcn2 receptors (Lcn2R and megalin). Male Swiss mice were subjected to 30 min of renal ischemia with a reperfusion period of 24 h (early reperfusion, expected time for maximum inflammation) and 96 h (late reperfusion, expected time for maximum regeneration). Different experimental groups underwent I/R, I/R with iv anti-mouse Lcn2 monoclonal antibody injected during the early/inflammatory or late/recovery phase, and I/R with proinflammatory cytokine cocktail administration (recombinant mouse IL-1β, TNF-α, and IFN-γ). Compared with control nonischemic mice, the expression of three proliferation markers (stathmin, PCNA, and Ki-67, analyzed by quantitative RT-PCR) increased significantly in the I/R-treated animals. Blockade of Lcn2 by addition of anti-Lcn2 antibody significantly decreased the expression of these three proliferation markers when administered in the late/reparative phase, but had the opposite effect when administered in the early/inflammatory phase. Proinflammatory cytokine cocktail administration reduced the proliferative effects of Lcn2, and repressed Lcn2R and megalin expression. In conclusion, endogenously generated Lcn2 induces renal cell regeneration depending on the inflammatory cytokines in kidney I/R.
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Kuo CW, Chen CM, Lee YC, Chu ST, Khoo KH. Glycomics and proteomics analyses of mouse uterine luminal fluid revealed a predominance of Lewis Y and X epitopes on specific protein carriers. Mol Cell Proteomics 2008; 8:325-42. [PMID: 18941134 DOI: 10.1074/mcp.m800320-mcp200] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Sperm motility and maturation are known to be affected by a host of factors encountered en route in both male and female genital tracts prior to fertilization. Using a concerted proteomics and glycomics approach with advanced mass spectrometry-based glycan sequencing capability, we show in this work that 24p3, an abundant mouse uterine luminal fluid (ULF) glycoprotein also called lipocalin 2 (Lcn2), is highly fucosylated in the context of carrying multiple Lewis X and Y epitopes on complex type N-glycans at its single glycosylation site. The predominance of Lewis X/Y along with Neu5Acalpha2-6 sialylation was found to be a salient feature of the ULF glycome, and several other protein carriers were additionally identified including the highly abundant lactotransferrin, which is N-glycosylated at two sites, both with a similar range of highly fucosylated N-glycans. A comparative glycomics analysis of the male genital tract fluids revealed that there is a gradient of glycomic complexity from the cauda to caput regions of the epididymis, varying from high mannose to sialylated complex type N-glycans but mostly devoid of fucosylation. The seminal vesicle fluid glycome, on the other hand, carries equally abundant multimeric Lewis X structures but is distinctively lacking in additional fucosylation of the terminal galactose to give the Lewis Y epitope typifying the glycome of female ULF. One-dimensional shotgun proteomics analysis identified over 40 proteins in the latter, many of which are reported for the first time, and a majority are notably involved in immune defense and antigen processing. Further sperm binding and motility assays suggest that the Lewis X/Y epitopes do contribute to the sperm motility-enhancing activity of 24p3, whereas lactotransferrin is largely inactive in this context despite being similarly glycosylated. These findings underline the importance of glycoproteomics in delineating both the specific glycan structures and their carriers in assigning glycobiological functions.
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Affiliation(s)
- Chu-Wei Kuo
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
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Abergel RJ, Clifton MC, Pizarro JC, Warner JA, Shuh DK, Strong RK, Raymond KN. The siderocalin/enterobactin interaction: a link between mammalian immunity and bacterial iron transport. J Am Chem Soc 2008; 130:11524-34. [PMID: 18680288 PMCID: PMC3188318 DOI: 10.1021/ja803524w] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The siderophore enterobactin (Ent) is produced by enteric bacteria to mediate iron uptake. Ent scavenges iron and is taken up by the bacteria as the highly stable ferric complex [Fe (III)(Ent)] (3-). This complex is also a specific target of the mammalian innate immune system protein, Siderocalin (Scn), which acts as an antibacterial agent by specifically sequestering siderophores and their ferric complexes during infection. Recent literature suggesting that Scn may also be involved in cellular iron transport has increased the importance of understanding the mechanism of siderophore interception and clearance by Scn; Scn is observed to release iron in acidic endosomes and [Fe (III)(Ent)] (3-) is known to undergo a change from catecholate to salicylate coordination in acidic conditions, which is predicted to be sterically incompatible with the Scn binding pocket (also referred to as the calyx). To investigate the interactions between the ferric Ent complex and Scn at different pH values, two recombinant forms of Scn with mutations in three residues lining the calyx were prepared: Scn-W79A/R81A and Scn-Y106F. Binding studies and crystal structures of the Scn-W79A/R81A:[Fe (III)(Ent)] (3-) and Scn-Y106F:[Fe (III)(Ent)] (3-) complexes confirm that such mutations do not affect the overall conformation of the protein but do weaken significantly its affinity for [Fe (III)(Ent)] (3-). Fluorescence, UV-vis, and EXAFS spectroscopies were used to determine Scn/siderophore dissociation constants and to characterize the coordination mode of iron over a wide pH range, in the presence of both mutant proteins and synthetic salicylate analogues of Ent. While Scn binding hinders salicylate coordination transformation, strong acidification results in the release of iron and degraded siderophore. Iron release may therefore result from a combination of Ent degradation and coordination change.
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Affiliation(s)
- Rebecca J. Abergel
- Department of Chemistry, University of California, Berkeley, CA 94720-1460
| | - Matthew C. Clifton
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Juan C. Pizarro
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Jeffrey A. Warner
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
| | - David K. Shuh
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
| | - Roland K. Strong
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Kenneth N. Raymond
- Department of Chemistry, University of California, Berkeley, CA 94720-1460
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
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Abstract
According to the free radical theory of aging proposed by Denham Harman more than 50 years ago, oxidatively modified cellular components accumulate continuously in the cells during the organism's lifespan leading to progressive decline of cellular functions. Since then, it has been shown that proteins, lipids, nucleic acids and other cell components undergo reversible and/or irreversible oxidative modifications during aging. Moreover, oxidized cell components can undergo further oxidative modifications leading to formation of products that cell degradation systems are incapable of removing. Accumulation of such non-degradable aggregates further inhibits the functionality of degradation systems, thus aggravating the effects and leading to a vicious cycle. In this presentation, we propose that the availability of intracellular iron in its redox active form (labile iron) represents the main catalyst that mediates extensive oxidative modifications of cellular components and ultimately leads to their accumulation and consequent cellular dysfunction. It is tempting to speculate that regulated restriction of labile iron may have positive effects on health in general and aging in particular.
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Affiliation(s)
- Dimitrios Galaris
- Laboratory of Biological Chemistry, University of Ioannina Medical School, Ioannina, Greece.
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Richardson DR, Lok HC. The nitric oxide–iron interplay in mammalian cells: Transport and storage of dinitrosyl iron complexes. Biochim Biophys Acta Gen Subj 2008; 1780:638-51. [DOI: 10.1016/j.bbagen.2007.12.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Revised: 12/03/2007] [Accepted: 12/18/2007] [Indexed: 02/05/2023]
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Lin HH, Li WW, Lee YC, Chu ST. Apoptosis induced by uterine 24p3 protein in endometrial carcinoma cell line. Toxicology 2007; 234:203-15. [PMID: 17420078 DOI: 10.1016/j.tox.2007.02.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 02/26/2007] [Accepted: 02/26/2007] [Indexed: 11/16/2022]
Abstract
The biological functions and reaction pathways of lipocalins in mammalian system were sought. Mouse uterine 24p3 protein is a secreted lipocalin from mouse uterus. To evaluate the effect of uterine 24p3 protein on the reproductive system, endometrial carcinoma cell line (RL95-2) was an experimental target for achieving the in vitro study. The cells were treated with 0.75 microM dexamethasone (DEX) or under serum-free medium to mimic the stress environment for various time periods, then employing Western blot to measure the 24p3 protein secretion. It showed the time-dependent induction effect on 24p3 protein and suggested the level of protein secretion correlating to environmental stress. Furthermore, the supplementation of 24p3 protein to the medium accompanied the reduction of cell viability. It showed that the 24p3 protein may be a death factor under conditional media via PI and annexinV-FITC assay. Based on the autocrine hypothesis, we investigated the effect of 24p3 protein on cultured RL95-2 cells upon the 24p3 protein interaction. We have demonstrated significant increase in intracellular reactive oxygen species upon 24p3 protein interaction. While the changes of mitochondrial membrane potential and cytochrome c release from mitochondria occurred, the activities of caspase-8, -9 and -3 were found to have increased. The condensation of DNA was occurred suggesting that 24p3 protein induced irreparable DNA damage, which in turn triggered the process of apoptosis. It shows evidence for the direct effect of this protein on endometrial cells. These findings suggest that 24p3 protein creates an intracellular oxidative environment that induces apoptosis in RL95-2 cells.
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Affiliation(s)
- Hsiu Hsia Lin
- Institute of Biochemical Science, College of Life Science, National Taiwan University, Taipei, Taiwan
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Dunn LL, Suryo Rahmanto Y, Richardson DR. Iron uptake and metabolism in the new millennium. Trends Cell Biol 2007; 17:93-100. [PMID: 17194590 DOI: 10.1016/j.tcb.2006.12.003] [Citation(s) in RCA: 279] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 11/28/2006] [Accepted: 12/13/2006] [Indexed: 12/18/2022]
Abstract
Iron is an essential element for metabolic processes intrinsic to life, and yet the properties that make iron a necessity also make it potentially deleterious. To avoid harm, iron homeostasis is achieved through iron transport, storage and regulatory proteins. The functions of some of these molecules are well described, for example transferrin and transferrin receptor-1, whereas the roles of others, such as the transferrin homolog melanotransferrin, remain unclear. The past decade has seen the identification of new molecules involved in iron metabolism, such as divalent metal transporter-1, ferroportin-1, hepcidin, hemojuvelin and heme carrier protein-1. Here, we focus on these intriguing new molecules and the insights gained from them into cellular iron uptake and the regulation of iron metabolism.
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Affiliation(s)
- Louise L Dunn
- Iron Metabolism and Chelation Program, Department of Pathology, Blackburn Building D06, University of Sydney, Sydney, NSW 2006, Australia
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Li PT, Lee YC, Elangovan N, Chu ST. Mouse 24p3 protein has an effect on L929 cell viability. Int J Biol Sci 2007; 3:100-7. [PMID: 17304338 PMCID: PMC1796953 DOI: 10.7150/ijbs.3.100] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Accepted: 01/12/2007] [Indexed: 11/30/2022] Open
Abstract
It is well known that mouse uterine 24p3 protein, is an acute phase protein, secreted from the L929 cell line, and that it will be induced by the dexamethasone stimulation of the cell. We investigated the possible effects of 24p3 protein on the L929 cell line, by observing its morphological change, ROS increase and viability decrease, by the process of culturing in a 24p3 protein-supplemented medium. Following the L929 cells′ exposure to the 24p3 protein supplement for a period of 72 hours, S-phase cells accumulated to a significant degree, suggesting that the entry into the G2/M phase from the S phase, in the cell cycle progression, was blocked. There was a significant decrease in cell numbers and increased DNA damage within the cells in the presence of 24p3 protein within the medium for 96 hours, implying that they have undergone pathway of cell death. After 96h incubation in low concentration of 24p3 protein, the result of PI/annexin V double staining showed cell death obviously. These results suggest that 24p3 protein-induced S phase arrest in the cell cycle, would cause DNA damage, followed by cell death in the L929 cells.
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Affiliation(s)
- Pei-Tzu Li
- 2. Institute of Biochemical Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Ying-Chu Lee
- 1. Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Namasivayam Elangovan
- 2. Institute of Biochemical Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Sin-Tak Chu
- 1. Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- 2. Institute of Biochemical Science, College of Life Science, National Taiwan University, Taipei, Taiwan
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