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Ednacot EMQ, Nabhani A, Dinh DM, Morehouse BR. Pharmacological potential of cyclic nucleotide signaling in immunity. Pharmacol Ther 2024; 258:108653. [PMID: 38679204 DOI: 10.1016/j.pharmthera.2024.108653] [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: 01/07/2024] [Revised: 03/16/2024] [Accepted: 04/17/2024] [Indexed: 05/01/2024]
Abstract
Cyclic nucleotides are important signaling molecules that play many critical physiological roles including controlling cell fate and development, regulation of metabolic processes, and responding to changes in the environment. Cyclic nucleotides are also pivotal regulators in immune signaling, orchestrating intricate processes that maintain homeostasis and defend against pathogenic threats. This review provides a comprehensive examination of the pharmacological potential of cyclic nucleotide signaling pathways within the realm of immunity. Beginning with an overview of the fundamental roles of cAMP and cGMP as ubiquitous second messengers, this review delves into the complexities of their involvement in immune responses. Special attention is given to the challenges associated with modulating these signaling pathways for therapeutic purposes, emphasizing the necessity for achieving cell-type specificity to avert unintended consequences. A major focus of the review is on the recent paradigm-shifting discoveries regarding specialized cyclic nucleotide signals in the innate immune system, notably the cGAS-STING pathway. The significance of cyclic dinucleotides, exemplified by 2'3'-cGAMP, in controlling immune responses against pathogens and cancer, is explored. The evolutionarily conserved nature of cyclic dinucleotides as antiviral agents, spanning across diverse organisms, underscores their potential as targets for innovative immunotherapies. Findings from the last several years have revealed a striking diversity of novel bacterial cyclic nucleotide second messengers which are involved in antiviral responses. Knowledge of the existence and precise identity of these molecules coupled with accurate descriptions of their associated immune defense pathways will be essential to the future development of novel antibacterial therapeutic strategies. The insights presented herein may help researchers navigate the evolving landscape of immunopharmacology as it pertains to cyclic nucleotides and point toward new avenues or lines of thinking about development of therapeutics against the pathways they regulate.
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Affiliation(s)
- Eirene Marie Q Ednacot
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California Irvine, Irvine, CA 92697, USA; Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California Irvine, Irvine, CA 92697, USA
| | - Ali Nabhani
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California Irvine, Irvine, CA 92697, USA
| | - David M Dinh
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California Irvine, Irvine, CA 92697, USA
| | - Benjamin R Morehouse
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California Irvine, Irvine, CA 92697, USA; Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California Irvine, Irvine, CA 92697, USA; Institute for Immunology, University of California Irvine, Irvine, CA 92697, USA; Center for Virus Research, University of California Irvine, Irvine, CA 92697, USA.
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2
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Cao X, Cordova AF, Li L. Therapeutic Interventions Targeting Innate Immune Receptors: A Balancing Act. Chem Rev 2021; 122:3414-3458. [PMID: 34870969 DOI: 10.1021/acs.chemrev.1c00716] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The innate immune system is an organism's first line of defense against an onslaught of internal and external threats. The downstream adaptive immune system has been a popular target for therapeutic intervention, while there is a relative paucity of therapeutics targeting the innate immune system. However, the innate immune system plays a critical role in many human diseases, such as microbial infection, cancer, and autoimmunity, highlighting the need for ongoing therapeutic research. In this review, we discuss the major innate immune pathways and detail the molecular strategies underpinning successful therapeutics targeting each pathway as well as previous and ongoing efforts. We will also discuss any recent discoveries that could inform the development of novel therapeutic strategies. As our understanding of the innate immune system continues to develop, we envision that therapies harnessing the power of the innate immune system will become the mainstay of treatment for a wide variety of human diseases.
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3
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Cordova A, Ritchie C, Böhnert V, Li L. Human SLC46A2 Is the Dominant cGAMP Importer in Extracellular cGAMP-Sensing Macrophages and Monocytes. ACS CENTRAL SCIENCE 2021; 7:1073-1088. [PMID: 34235268 PMCID: PMC8228594 DOI: 10.1021/acscentsci.1c00440] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 05/04/2023]
Abstract
Administration of exogenous CDNs to activate the cGAMP-STING pathway is a promising therapeutic strategy to unleash the full potential of cancer immunotherapy. This strategy mirrors the role of endogenous extracellular cGAMP, an immunotransmitter that is transferred from cancer cells to cGAMP-sensing cells in the host, promoting immunity. However, the CDN import mechanisms used by host cells within tumors remain unknown. Here we identified the protein SLC46A2 as the dominant cGAMP importer in primary human monocytes. Furthermore, we discovered that monocytes and M1-polarized macrophages directly sense tumor-derived extracellular cGAMP in murine tumors. Finally, we demonstrated that SLC46A2 is the dominant cGAMP importer in monocyte-derived macrophages. Together, we provide the first cellular and molecular mechanisms of cGAMP as an immunotransmitter, paving the way for effective STING pathway therapeutics.
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Affiliation(s)
- Anthony
F. Cordova
- Department of Biochemistry and Institute of Chemistry, Engineering, and Medicine
for Human Health (ChEM-H), Stanford University, Stanford, California 94305, United States
| | - Christopher Ritchie
- Department of Biochemistry and Institute of Chemistry, Engineering, and Medicine
for Human Health (ChEM-H), Stanford University, Stanford, California 94305, United States
| | - Volker Böhnert
- Department of Biochemistry and Institute of Chemistry, Engineering, and Medicine
for Human Health (ChEM-H), Stanford University, Stanford, California 94305, United States
| | - Lingyin Li
- Department of Biochemistry and Institute of Chemistry, Engineering, and Medicine
for Human Health (ChEM-H), Stanford University, Stanford, California 94305, United States
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4
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Kim KY, Yoon M, Cho Y, Lee KH, Park S, Lee SR, Choi SY, Lee D, Yang C, Cho EH, Jeon SD, Kim SH, Kim C, Kim MG. Targeting metastatic breast cancer with peptide epitopes derived from autocatalytic loop of Prss14/ST14 membrane serine protease and with monoclonal antibodies. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:363. [PMID: 31426843 PMCID: PMC6701106 DOI: 10.1186/s13046-019-1373-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 08/09/2019] [Indexed: 11/10/2022]
Abstract
Background In order to develop a new immunotherapeutic agent targeting metastatic breast cancers, we chose to utilize autocatalytic feature of the membrane serine protease Prss14/ST14, a specific prognosis marker for ER negative breast cancer as a target molecule. Methods The study was conducted using three mouse breast cancer models, 4 T1 and E0771 mouse breast cancer cells into their syngeneic hosts, and an MMTV-PyMT transgenic mouse strain was used. Prss14/ST14 knockdown cells were used to test function in tumor growth and metastasis, peptides derived from the autocatalytic loop for activation were tested as preventive metastasis vaccine, and monoclonal and humanized antibodies to the same epitope were tested as new therapeutic candidates. ELISA, immunoprecipitation, Immunofluorescent staining, and flow cytometry were used to examine antigen binding. The functions of antibodies were tested in vitro for cell migration and in vivo for tumor growth and metastasis. Results Prss14/ST14 is critically involved in the metastasis of breast cancer and poor survival rather than primary tumor growth in two mouse models. The epitopes derived from the specific autocatalytic loop region of Prss14/ST14, based on structural modeling acted as efficient preventive metastasis vaccines in mice. A new specific monoclonal antibody mAb3F3 generated against the engineered loop structure could reduce cell migration, eliminate metastasis in PyMT mice, and can detect the Prss14/ST14 protein expressed in various human cancer cells. Humanized antibody huAb3F3 maintained the specificity and reduced the migration of human breast cancer cells in vitro. Conclusion Our study demonstrates that Prss14/ST14 is an important target for modulating metastasis. Our newly developed hybridoma mAbs and humanized antibody can be further developed as new promising candidates for the use in diagnosis and in immunotherapy of human metastatic breast cancer. Electronic supplementary material The online version of this article (10.1186/s13046-019-1373-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ki Yeon Kim
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea
| | - Minsang Yoon
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea
| | - Youngkyung Cho
- Division of Life Sciences, Seoul National University, Seoul, South Korea
| | - Kwang-Hoon Lee
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, South Korea
| | - Sora Park
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, South Korea
| | - Se-Ra Lee
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, South Korea
| | - So-Young Choi
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, South Korea
| | - Deokjae Lee
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea.,MedyTox, 114, Central town-ro, Yeongtong-gu, Suwon, South Korea
| | - Chansik Yang
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea.,Division of Life Sciences, Seoul National University, Seoul, South Korea
| | - Eun Hye Cho
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea
| | - Sangjun Davie Jeon
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea
| | - Seok-Hyung Kim
- Department of Pathology, College of Medicine, Sungkyunkwan University, Samsung Medical Center, Seoul, South Korea
| | - Chungho Kim
- Department of Life Sciences, Korea University, Seoul, South Korea
| | - Moon Gyo Kim
- Department of Biological Sciences, Inha University, Inharo 100, Michuhol-Gu, Incheon, Republic of Korea. .,Convergent Research Institute for Metabolism and Immunoregulation, Inha University, Incheon, South Korea.
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5
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Kim SG, Kim KY, Hong S, Kim MG. B16 melanoma expressing EGFP as a self antigen is differentially immunoedited by tolerogenic thymic epithelial and dendritic cells. Anim Cells Syst (Seoul) 2017. [DOI: 10.1080/19768354.2017.1406870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Su Gang Kim
- Department of Biological Sciences, Inha University, Incheon, Republic of Korea
| | - Ki Yeon Kim
- Department of Biological Sciences, Inha University, Incheon, Republic of Korea
| | - Seokmann Hong
- Department of Integrative Bioscience and Biotechnology, Institute of Anticancer Medicine Development, Sejong University, Seoul, Republic of Korea
| | - Moon Gyo Kim
- Department of Biological Sciences, Inha University, Incheon, Republic of Korea
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6
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Oh J, Shin JS. The Role of Dendritic Cells in Central Tolerance. Immune Netw 2015; 15:111-20. [PMID: 26140042 PMCID: PMC4486773 DOI: 10.4110/in.2015.15.3.111] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/26/2015] [Accepted: 06/02/2015] [Indexed: 12/16/2022] Open
Abstract
Dendritic cells (DCs) play a significant role in establishing self-tolerance through their ability to present self-antigens to developing T cells in the thymus. DCs are predominantly localized in the medullary region of thymus and present a broad range of self-antigens, which include tissue-restricted antigens expressed and transferred from medullary thymic epithelial cells, circulating antigens directly captured by thymic DCs through coticomedullary junction blood vessels, and peripheral tissue antigens captured and transported by peripheral tissue DCs homing to the thymus. When antigen-presenting DCs make a high affinity interaction with antigen-specific thymocytes, this interaction drives the interacting thymocytes to death, a process often referred to as negative selection, which fundamentally blocks the self-reactive thymocytes from differentiating into mature T cells. Alternatively, the interacting thymocytes differentiate into the regulatory T (Treg) cells, a distinct T cell subset with potent immune suppressive activities. The specific mechanisms by which thymic DCs differentiate Treg cells have been proposed by several laboratories. Here, we review the literatures that elucidate the contribution of thymic DCs to negative selection and Treg cell differentiation, and discusses its potential mechanisms and future directions.
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Affiliation(s)
- Jaehak Oh
- Department of Microbiology and Immunology, Sandler Asthma Basic Research Center, University of California San Francisco, San Francisco, CA 94143, USA
| | - Jeoung-Sook Shin
- Department of Microbiology and Immunology, Sandler Asthma Basic Research Center, University of California San Francisco, San Francisco, CA 94143, USA
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7
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Kim KY, Lee G, Yoon M, Cho EH, Park CS, Kim MG. Expression Analyses Revealed Thymic Stromal Co-Transporter/Slc46A2 Is in Stem Cell Populations and Is a Putative Tumor Suppressor. Mol Cells 2015; 38:548-61. [PMID: 26013383 PMCID: PMC4469913 DOI: 10.14348/molcells.2015.0044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 03/10/2015] [Accepted: 03/10/2015] [Indexed: 01/08/2023] Open
Abstract
By combining conventional single cell analysis with flow cytometry and public database searches with bioinformatics tools, we extended the expression profiling of thymic stromal cotransporter (TSCOT), Slc46A2/Ly110, that was shown to be expressed in bipotent precursor and cortical thymic epithelial cells. Genome scale analysis verified TSCOT expression in thymic tissue- and cell type- specific fashion and is also expressed in some other epithelial tissues including skin and lung. Coexpression profiling with genes, Foxn1 and Hoxa3, revealed the role of TSCOT during the organogenesis. TSCOT expression was detected in all thymic epithelial cells (TECs), but not in the CD31(+) endothelial cell lineage in fetal thymus. In addition, ABC transporter-dependent side population and Sca-1(+) fetal TEC populations both contain TSCOT-expressing cells, indicating TEC stem cells express TSCOT. TSCOT expression was identified as early as in differentiating embryonic stem cells. TSCOT expression is not under the control of Foxn1 since TSCOT is present in the thymic rudiment of nude mice. By searching variations in the expression levels, TSCOT is positively associated with Grhl3 and Irf6. Cytokines such as IL1b, IL22 and IL24 are the potential regulators of the TSCOT expression. Surprisingly, we found TSCOT expression in the lung is diminished in lung cancers, suggesting TSCOT may be involved in the suppression of lung tumor development. Based on these results, a model for TEC differentiation from the stem cells was proposed in context of multiple epithelial organ formation.
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Affiliation(s)
- Ki Yeon Kim
- Department of Biological Sciences, Inha University, Incheon 402-720,
Korea
| | - Gwanghee Lee
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, MO 63110,
USA
| | - Minsang Yoon
- Department of Biological Sciences, Inha University, Incheon 402-720,
Korea
| | - Eun Hye Cho
- Department of Biological Sciences, Inha University, Incheon 402-720,
Korea
| | - Chan-Sik Park
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
| | - Moon Gyo Kim
- Department of Biological Sciences, Inha University, Incheon 402-720,
Korea
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8
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Sansom SN, Shikama-Dorn N, Zhanybekova S, Nusspaumer G, Macaulay IC, Deadman ME, Heger A, Ponting CP, Holländer GA. Population and single-cell genomics reveal the Aire dependency, relief from Polycomb silencing, and distribution of self-antigen expression in thymic epithelia. Genome Res 2014; 24:1918-31. [PMID: 25224068 PMCID: PMC4248310 DOI: 10.1101/gr.171645.113] [Citation(s) in RCA: 229] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Accepted: 09/12/2014] [Indexed: 12/18/2022]
Abstract
Promiscuous gene expression (PGE) by thymic epithelial cells (TEC) is essential for generating a diverse T cell antigen receptor repertoire tolerant to self-antigens, and thus for avoiding autoimmunity. Nevertheless, the extent and nature of this unusual expression program within TEC populations and single cells are unknown. Using deep transcriptome sequencing of carefully identified mouse TEC subpopulations, we discovered a program of PGE that is common between medullary (m) and cortical TEC, further elaborated in mTEC, and completed in mature mTEC expressing the autoimmune regulator gene (Aire). TEC populations are capable of expressing up to 19,293 protein-coding genes, the highest number of genes known to be expressed in any cell type. Remarkably, in mouse mTEC, Aire expression alone positively regulates 3980 tissue-restricted genes. Notably, the tissue specificities of these genes include known targets of autoimmunity in human AIRE deficiency. Led by the observation that genes induced by Aire expression are generally characterized by a repressive chromatin state in somatic tissues, we found these genes to be strongly associated with H3K27me3 marks in mTEC. Our findings are consistent with AIRE targeting and inducing the promiscuous expression of genes previously epigenetically silenced by Polycomb group proteins. Comparison of the transcriptomes of 174 single mTEC indicates that genes induced by Aire expression are transcribed stochastically at low cell frequency. Furthermore, when present, Aire expression-dependent transcript levels were 16-fold higher, on average, in individual TEC than in the mTEC population.
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Affiliation(s)
- Stephen N Sansom
- MRC Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, United Kingdom;
| | - Noriko Shikama-Dorn
- Paediatric Immunology, Department of Biomedicine, University of Basel, and The Basel University Children's Hospital, Basel, 4058, Switzerland
| | - Saule Zhanybekova
- Paediatric Immunology, Department of Biomedicine, University of Basel, and The Basel University Children's Hospital, Basel, 4058, Switzerland
| | - Gretel Nusspaumer
- Paediatric Immunology, Department of Biomedicine, University of Basel, and The Basel University Children's Hospital, Basel, 4058, Switzerland
| | - Iain C Macaulay
- Wellcome Trust Sanger Institute-EBI Single Cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Mary E Deadman
- Developmental Immunology, Department of Paediatrics, and the Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Andreas Heger
- MRC Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, United Kingdom
| | - Chris P Ponting
- MRC Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, United Kingdom; Wellcome Trust Sanger Institute-EBI Single Cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Georg A Holländer
- Paediatric Immunology, Department of Biomedicine, University of Basel, and The Basel University Children's Hospital, Basel, 4058, Switzerland; Developmental Immunology, Department of Paediatrics, and the Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
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9
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Differential lineage specification of thymic epithelial cells from bipotent precursors revealed by TSCOT promoter activities. Genes Immun 2013; 14:401-6. [DOI: 10.1038/gene.2013.30] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 04/22/2013] [Accepted: 04/23/2013] [Indexed: 11/08/2022]
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10
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Lee G, Kim KY, Chang CH, Kim MG. Thymic epithelial requirement for γδ T cell development revealed in the cell ablation transgenic system with TSCOT promoter. Mol Cells 2012; 34:481-93. [PMID: 23178972 PMCID: PMC3524997 DOI: 10.1007/s10059-012-0246-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 10/10/2012] [Indexed: 10/27/2022] Open
Abstract
In order to investigate the role of thymic epithelial cell (TEC) subsets during T-cell development, we established a new transgenic system, enabling inducible cell-specific ablation as well as marking the TEC subsets using bicistronic bacterial nitroreductase and EGFP genes. Two different lengths of the TSCOT promoter in transgenic mice, named 3.1T-NE and 9.1T-NE, drive EGFP expression into TECs. In adult life, EGFP expression was located in the medulla with a smaller 3.1 kb TSCOT promoter, while it was maintained in the cortex with a 9.1 kb promoter, suggesting putative TEC specific as well as compartment specific cis elements within two promoters. Nitroreductase induced cell death was specific without bystander killing upon the treatment of prodrugs such as nitrofurantoin and metronidazol. The degree of cell death was dependent on the dose of the prodrug in the cell and the fetal thymic organ cultures (FTOCs). Fetal thymic stromal populations were analyzed based on the expression levels of EpCAM, MHCII, CDR1 and/or UEA-1. EGFP expression patterns varied among subsets indicating the differential TSCOT promoter activity in each TEC subset. Prodrug treatment in FTOCs reduced the numbers of total and subsets of thymocytes. A CD4(+)CD8(+) double positive cell population was highly susceptible in both transgenic lines. Surprisingly, there was a distinct reduction in γδ T cell population only in the 9.1T-NE thymus, indicating that they require a NTREGFP expressing TEC population. Therefore, these results support a division of labor within TEC subsets for the αβ and γδ lineage specification.
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Affiliation(s)
| | - Ki Yeon Kim
- Department of Biological Sciences, Inha University, Incheon 402-701,
Korea
| | | | - Moon Gyo Kim
- Department of Biological Sciences, Inha University, Incheon 402-701,
Korea
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11
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Lee D, Lee HS, Yang SJ, Jeong H, Kim DY, Lee SD, Oh JW, Park D, Kim MG. PRSS14/Epithin is induced in macrophages by the IFN-γ/JAK/STAT pathway and mediates transendothelial migration. Biochem Biophys Res Commun 2011; 405:644-50. [PMID: 21295011 DOI: 10.1016/j.bbrc.2011.01.084] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 01/24/2011] [Indexed: 12/27/2022]
Abstract
PRSS14/Epithin (also known as matriptase and ST14), a member of the type II transmembrane serine proteases, is primarily found in a subpopulation of normal epithelial cells and in epithelial cancers. Its known functions include maintaining the epithelial barrier, thymic development, and cancer progression. In this study, we show that several macrophage cell lines and activated bone marrow-derived macrophages also express PRSS14/Epithin. Surface expression, as well as cytoplasmic expression, was detectable upon activation by IFN-γ, but not TNF-α or TGF-β. Induction of the protein appeared to be restricted to macrophages. IFN-γ showed a biphasic regulation in RAW264.7 cells, and upregulated expression was sustained for several days. This induction by IFN-γ was partially through the increase of PRSS14/Epithin mRNA production, which is downstream of the JAK pathway, shown by the inhibition by tyrphostin AG490. Using chromatin immunoprecipitation, we verified that two sites among six putative STAT1 binding sites in the PRSS14/Epithin promoter were occupied by STAT1 upon activation. Treatment with IFN-γ enhanced the serum-triggered transendothelial migration of RAW264.7 cells, but not that of PRSS14/Epithin knock-down RAW264.7 cells, although they express multiple markers such as ICAM1, CD80, and CD40 at normal levels. These data strongly suggest that PRSS14/Epithin plays an important role in the transendothelial migration of activated macrophages in the inflammatory microenvironment, and the mode of action is similar to the events in cancer metastasis.
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Affiliation(s)
- Deokjae Lee
- Department of Biological Sciences, Inha University, Yonghyun-dong, Incheon 402-751, Republic of Korea
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12
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Lee G, Origanti S, White LS, Sun J, Stappenbeck TS, Piwnica-Worms H. Contributions made by CDC25 phosphatases to proliferation of intestinal epithelial stem and progenitor cells. PLoS One 2011; 6:e15561. [PMID: 21283624 PMCID: PMC3026785 DOI: 10.1371/journal.pone.0015561] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Accepted: 11/13/2010] [Indexed: 11/29/2022] Open
Abstract
The CDC25 protein phosphatases drive cell cycle advancement by activating cyclin-dependent protein kinases (CDKs). Humans and mice encode three family members denoted CDC25A, -B and -C and genes encoding these family members can be disrupted individually with minimal phenotypic consequences in adult mice. However, adult mice globally deleted for all three phosphatases die within one week after Cdc25 disruption. A severe loss of absorptive villi due to a failure of crypt epithelial cells to proliferate was observed in the small intestines of these mice. Because the Cdc25s were globally deleted, the small intestinal phenotype and loss of animal viability could not be solely attributed to an intrinsic defect in the inability of small intestinal stem and progenitor cells to divide. Here, we report the consequences of deleting different combinations of Cdc25s specifically in intestinal epithelial cells. The phenotypes arising in these mice were then compared with those arising in mice globally deleted for the Cdc25s and in mice treated with irinotecan, a chemotherapeutic agent commonly used to treat colorectal cancer. We report that the phenotypes arising in mice globally deleted for the Cdc25s are due to the failure of small intestinal stem and progenitor cells to proliferate and that blocking cell division by inhibiting the cell cycle engine (through Cdc25 loss) versus by inducing DNA damage (via irinotecan) provokes a markedly different response of small intestinal epithelial cells. Finally, we demonstrate that CDC25A and CDC25B but not CDC25C compensate for each other to maintain the proliferative capacity of intestinal epithelial stem and progenitor cells.
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Affiliation(s)
- Gwanghee Lee
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Sofia Origanti
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- BRIGHT Institute, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America
| | - Lynn S. White
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- BRIGHT Institute, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America
| | - Jinwu Sun
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Molecular Imaging Center, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Thaddeus S. Stappenbeck
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Helen Piwnica-Worms
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- BRIGHT Institute, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America
- * E-mail:
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13
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Kovalovsky D, Pezzano M, Ortiz BD, Sant'Angelo DB. A novel TCR transgenic model reveals that negative selection involves an immediate, Bim-dependent pathway and a delayed, Bim-independent pathway. PLoS One 2010; 5:e8675. [PMID: 20072628 PMCID: PMC2800196 DOI: 10.1371/journal.pone.0008675] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 12/15/2009] [Indexed: 11/18/2022] Open
Abstract
A complete understanding of negative selection has been elusive due to the rapid apoptosis and clearance of thymocytes in vivo. We report a TCR transgenic model in which expression of the TCR during differentiation occurs only after V(D)J-like recombination. TCR expression from this transgene closely mimics expression of the endogenous TCRalpha locus allowing for development that is similar to wild type thymocytes. This model allowed us to characterize the phenotypic changes that occurred after TCR-mediated signaling in self-reactive thymocytes prior to their deletion in a highly physiological setting. Self-reactive thymocytes were identified as being immature, activated and CD4(lo)CD8(lo). These cells had upregulated markers of negative selection and were apoptotic. Elimination of Bim reduced the apoptosis of self-reactive thymocytes, but it did not rescue their differentiation and the cells remained at the immature CD4(lo)CD8(lo) stage of development. These cells upregulate Nur77 and do not contribute to the peripheral T cell repertoire in vivo. Remarkably, development past the CD4(lo)CD8(lo) stage was possible once the cells were removed from the negatively selecting thymic environment. In vitro development of these cells occurred despite their maintenance of high intracellular levels of Nur77. Therefore, in vivo, negatively selected Bim-deficient thymocytes are eliminated after prolonged developmental arrest via a Bim-independent pathway that is dependent on the thymic microenvironment. These data newly reveal a layering of immediate, Bim-dependent, and delayed Bim-independent pathways that both contribute to elimination of self-reactive thymocytes in vivo.
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Affiliation(s)
- Damian Kovalovsky
- Immunology Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
| | - Mark Pezzano
- Department of Biology, The City College of New York, New York, New York, United States of America
| | - Benjamin D. Ortiz
- Department of Biological Sciences, City University of New York, Hunter College, New York, New York, United States of America
| | - Derek B. Sant'Angelo
- Immunology Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
- Louis V. Gerstner Jr. Graduate School of Biomedical Sciences, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
- Weill Graduate School of Medical Sciences of Cornell University, New York, New York, United States of America
- * E-mail:
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14
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Ebert PJR, Li QJ, Huppa JB, Davis MM. Functional development of the T cell receptor for antigen. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2010; 92:65-100. [PMID: 20800817 PMCID: PMC4887107 DOI: 10.1016/s1877-1173(10)92004-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
For over three decades now, the T cell receptor (TCR) for antigen has not ceased to challenge the imaginations of cellular and molecular immunologists alike. T cell antigen recognition transcends every aspect of adaptive immunity: it shapes the T cell repertoire in the thymus and directs T cell-mediated effector functions in the periphery, where it is also central to the induction of peripheral tolerance. Yet, despite its central position, there remain many questions unresolved: how can one TCR be specific for one particular peptide-major histocompatibility complex (pMHC) ligand while also binding other pMHC ligands with an immunologically relevant affinity? And how can a T cell's extreme specificity (alterations of single methyl groups in their ligand can abrogate a response) and sensitivity (single agonist ligands on a cell surface are sufficient to trigger a measurable response) emerge from TCR-ligand interactions that are so low in affinity? Solving these questions is intimately tied to a fundamental understanding of molecular recognition dynamics within the many different contexts of various T cell-antigen presenting cell (APC) contacts: from the thymic APCs that shape the TCR repertoire and guide functional differentiation of developing T cells to the peripheral APCs that support homeostasis and provoke antigen responses in naïve, effector, memory, and regulatory T cells. Here, we discuss our recent findings relating to T cell antigen recognition and how this leads to the thymic development of foreign-antigen-responsive alphabetaT cells.
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Affiliation(s)
- Peter J R Ebert
- The Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, USA
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15
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Antigen presentation in the thymus for positive selection and central tolerance induction. Nat Rev Immunol 2009; 9:833-44. [DOI: 10.1038/nri2669] [Citation(s) in RCA: 383] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Abstract
Immune self tolerance involves the deletion in the thymus of developing T cells that have the ability to recognize self-antigens, but by which cells? New evidence argues that cortical epithelial cells can induce deletion of self-reactive T cells.
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