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Luo G, Zeng D, Liu J, Li D, Takiff HE, Song S, Gao Q, Yan B. Temporal and cellular analysis of granuloma development in mycobacterial infected adult zebrafish. J Leukoc Biol 2024; 115:525-535. [PMID: 37982587 DOI: 10.1093/jleuko/qiad145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 09/25/2023] [Accepted: 11/01/2023] [Indexed: 11/21/2023] Open
Abstract
Because granulomas are a hallmark of tuberculosis pathogenesis, the study of the dynamic changes in their cellular composition and morphological character can facilitate our understanding of tuberculosis pathogenicity. Adult zebrafish infected with Mycobacterium marinum form granulomas that are similar to the granulomas in human patients with tuberculosis and therefore have been used to study host-mycobacterium interactions. Most studies of zebrafish granulomas, however, have focused on necrotic granulomas, while a systematic description of the different stages of granuloma formation in the zebrafish model is lacking. Here, we characterized the stages of granulomas in M. marinum-infected zebrafish, including early immune cell infiltration, nonnecrotizing granulomas, and necrotizing granulomas, using corresponding samples from patients with pulmonary tuberculosis as references. We combined hematoxylin and eosin staining and in situ hybridization to identify the different immune cell types and follow their spatial distribution in the different stages of granuloma development. The macrophages in zebrafish granulomas were shown to belong to distinct subtypes: epithelioid macrophages, foamy macrophages, and multinucleated giant cells. By defining the developmental stages of zebrafish granulomas and the spatial distribution of the different immune cells they contain, this work provides a reference for future studies of mycobacterial granulomas and their immune microenvironments.
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Affiliation(s)
- Geyang Luo
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, 130 Dongan Rd., Xuhui District, 200032 Shanghai, People's Republic of China
| | - Dong Zeng
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Jianxin Liu
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
- School of Medicine, Shanghai Ninth People's Hospital Affiliated to Shanghai JiaoTong University, 639 Manufacturing Bureau Rd., Huangpu District, 200011 Shanghai, People's Republic of China
| | - Duoduo Li
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Howard E Takiff
- Instituto Venezolano de Investigaciones Científicas, Centro de Microbiología y Biología Celular, Caracas, 1020A, Venezuela
| | - Shu Song
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Qian Gao
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, 130 Dongan Rd., Xuhui District, 200032 Shanghai, People's Republic of China
| | - Bo Yan
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
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Li G, Sun Y, Kwok I, Yang L, Wen W, Huang P, Wu M, Li J, Huang Z, Liu Z, He S, Peng W, Bei JX, Ginhoux F, Ng LG, Zhang Y. Cebp1 and Cebpβ transcriptional axis controls eosinophilopoiesis in zebrafish. Nat Commun 2024; 15:811. [PMID: 38280871 PMCID: PMC10821951 DOI: 10.1038/s41467-024-45029-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 01/11/2024] [Indexed: 01/29/2024] Open
Abstract
Eosinophils are a group of granulocytes well known for their capacity to protect the host from parasites and regulate immune function. Diverse biological roles for eosinophils have been increasingly identified, but the developmental pattern and regulation of the eosinophil lineage remain largely unknown. Herein, we utilize the zebrafish model to analyze eosinophilic cell differentiation, distribution, and regulation. By identifying eslec as an eosinophil lineage-specific marker, we establish a Tg(eslec:eGFP) reporter line, which specifically labeled cells of the eosinophil lineage from early life through adulthood. Spatial-temporal analysis of eslec+ cells demonstrates their organ distribution from larval stage to adulthood. By single-cell RNA-Seq analysis, we decipher the eosinophil lineage cells from lineage-committed progenitors to mature eosinophils. Through further genetic analysis, we demonstrate the role of Cebp1 in balancing neutrophil and eosinophil lineages, and a Cebp1-Cebpβ transcriptional axis that regulates the commitment and differentiation of the eosinophil lineage. Cross-species functional comparisons reveals that zebrafish Cebp1 is the functional orthologue of human C/EBPεP27 in suppressing eosinophilopoiesis. Our study characterizes eosinophil development in multiple dimensions including spatial-temporal patterns, expression profiles, and genetic regulators, providing for a better understanding of eosinophilopoiesis.
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Affiliation(s)
- Gaofei Li
- Department of Hematology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Yicong Sun
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Immanuel Kwok
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, 138648, Singapore
| | - Liting Yang
- Department of Developmental Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, P.R. China
| | - Wanying Wen
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Peixian Huang
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Mei Wu
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Jing Li
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Zhibin Huang
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China
| | - Zhaoyuan Liu
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Shuai He
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
| | - Wan Peng
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
| | - Jin-Xin Bei
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, 138648, Singapore
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Lai Guan Ng
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, 138648, Singapore.
- Shanghai Immune Therapy Institute, Shanghai Jiao Tong University School of Medicine Affiliated Renji Hospital, Shanghai, P.R. China.
- Department of Microbiology and Immunology, Immunology Translational Research Program, Yong Loo Lin School of Medicine, Immunology Program, Life Sciences Institute, National University of Singapore, Singapore, 117543, Singapore.
| | - Yiyue Zhang
- Department of Hematology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China.
- Innovation Centre of Ministry of Education for Development and Diseases, School of Medicine, South China University of Technology, Guangzhou, 510006, P.R. China.
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3
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Sposato AL, Llewellyn DR, Weber JM, Hollins HL, Schrock MN, Farrell JA, Gagnon JA. Germ cells do not progress through spermatogenesis in the infertile zebrafish testis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.05.556432. [PMID: 37732254 PMCID: PMC10508784 DOI: 10.1101/2023.09.05.556432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Vertebrate spermatogonial stem cells maintain sperm production over the lifetime of an animal but fertility declines with age. While morphological studies have greatly informed our understanding of typical spermatogenesis, the molecular and cellular mechanisms underlying spermatogenesis are not yet understood, particularly with respect to the onset of fertility. We used single-cell RNA sequencing to generate a developmental atlas of the zebrafish testis. Using 5 timepoints across the adult life of a zebrafish, we described cellular profiles in the testis during and after fertility. While all germ cell stages of spermatogenesis are detected in testes from fertile adult zebrafish, testes from older infertile males only contained spermatogonia and a reduced population of spermatocytes. These remaining germ cells are transcriptionally distinct from fertile spermatogonia. Immune cells including macrophages and lymphocytes drastically increase in abundance in infertile testes. Our developmental atlas reveals the cellular changes as the testis ages and defines a molecular roadmap for the regulation of male fertility.
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Affiliation(s)
- Andrea L. Sposato
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
| | | | - Jenna M. Weber
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Hailey L. Hollins
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Madison N. Schrock
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Jeffrey A. Farrell
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814
| | - James A. Gagnon
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112
- Henry Eyring Center for Cell and Genome Science, University of Utah, Salt Lake City, UT 84112
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Amin A, Morello M, Petrara MR, Rizzo B, Argenton F, De Rossi A, Giunco S. Short-Term TERT Inhibition Impairs Cellular Proliferation via a Telomere Length-Independent Mechanism and Can Be Exploited as a Potential Anticancer Approach. Cancers (Basel) 2023; 15:2673. [PMID: 37345011 DOI: 10.3390/cancers15102673] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/21/2023] [Accepted: 05/04/2023] [Indexed: 06/23/2023] Open
Abstract
Telomerase reverse transcriptase (TERT), the catalytic component of telomerase, may also contribute to carcinogenesis via telomere-length independent mechanisms. Our previous in vitro and in vivo studies demonstrated that short-term telomerase inhibition by BIBR1532 impairs cell proliferation without affecting telomere length. Here, we show that the impaired cell cycle progression following short-term TERT inhibition by BIBR1532 in in vitro models of B-cell lymphoproliferative disorders, i.e., Epstein-Barr virus (EBV)-immortalized lymphoblastoid cell lines (LCLs), and B-cell malignancies, i.e., Burkitt's lymphoma (BL) cell lines, is characterized by a significant reduction in NF-κB p65 nuclear levels leading to the downregulation of its target gene MYC. MYC downregulation was associated with increased expression and nuclear localization of P21, thus promoting its cell cycle inhibitory function. Consistently, treatment with BIBR1532 in wild-type zebrafish embryos significantly decreased Myc and increased p21 expression. The combination of BIBR1532 with antineoplastic drugs (cyclophosphamide or fludarabine) significantly reduced xenografted cells' proliferation rate compared to monotherapy in the zebrafish xenograft model. Overall, these findings indicate that short-term inhibition of TERT impairs cell growth through the downregulation of MYC via NF-κB signalling and supports the use of TERT inhibitors in combination with antineoplastic drugs as an efficient anticancer strategy.
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Affiliation(s)
- Aamir Amin
- Department of Surgery, Oncology and Gastroenterology, Section of Oncology and Immunology, University of Padova, 35128 Padova, Italy
| | - Marzia Morello
- Immunology and Diagnostic Molecular Oncology Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padova, Italy
| | - Maria Raffaella Petrara
- Department of Surgery, Oncology and Gastroenterology, Section of Oncology and Immunology, University of Padova, 35128 Padova, Italy
| | - Beatrice Rizzo
- Immunology and Diagnostic Molecular Oncology Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padova, Italy
| | | | - Anita De Rossi
- Department of Surgery, Oncology and Gastroenterology, Section of Oncology and Immunology, University of Padova, 35128 Padova, Italy
- Immunology and Diagnostic Molecular Oncology Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padova, Italy
| | - Silvia Giunco
- Department of Surgery, Oncology and Gastroenterology, Section of Oncology and Immunology, University of Padova, 35128 Padova, Italy
- Immunology and Diagnostic Molecular Oncology Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padova, Italy
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5
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Dai Y, Wu S, Cao C, Xue R, Luo X, Wen Z, Xu J. Csf1rb regulates definitive hematopoiesis in zebrafish. Development 2022; 149:276084. [DOI: 10.1242/dev.200534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 07/07/2022] [Indexed: 11/20/2022]
Abstract
ABSTRACT
In vertebrates, hematopoietic stem and progenitor cells (HSPCs) are capable of self-renewal and continuously replenishing all mature blood lineages throughout life. However, the molecular signaling regulating the maintenance and expansion of HSPCs remains incompletely understood. Colony-stimulating factor 1 receptor (CSF1R) is believed to be the primary regulator for the myeloid lineage but not HSPC development. Here, we show a surprising role of Csf1rb, a zebrafish homolog of mammalian CSF1R, in preserving the HSPC pool by maintaining the proliferation of HSPCs. Deficiency of csf1rb leads to a reduction in both HSPCs and their differentiated progenies, including myeloid, lymphoid and erythroid cells at early developmental stages. Likewise, the absence of csf1rb conferred similar defects upon HSPCs and leukocytes in adulthood. Furthermore, adult hematopoietic cells from csf1rb mutants failed to repopulate immunodeficient zebrafish. Interestingly, loss-of-function and gain-of-function assays suggested that the canonical ligands for Csf1r in zebrafish, including Csf1a, Csf1b and Il34, were unlikely to be ligands of Csf1rb. Thus, our data indicate a previously unappreciated role of Csf1r in maintaining HSPCs, independently of known ligands.
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Affiliation(s)
- Yimei Dai
- School of Medicine, South China University of Technology 1 Laboratory of Immunology & Regeneration , , Guangzhou 510006, China
| | - Shuting Wu
- State Key Laboratory of Molecular Neuroscience and Center of Systems Biology and Human Health, the Hong Kong University of Science and Technology 2 Division of Life Science , , Clear Water Bay, Kowloon, Hong Kong , People's Republic of China
| | - Canran Cao
- School of Medicine, South China University of Technology 1 Laboratory of Immunology & Regeneration , , Guangzhou 510006, China
| | - Rongtao Xue
- Nanfang Hospital, Southern Medical University 3 Department of Hematology , , Guangzhou, Guangdong 510515 , China
| | - Xuefen Luo
- State Key Laboratory of Molecular Neuroscience and Center of Systems Biology and Human Health, the Hong Kong University of Science and Technology 2 Division of Life Science , , Clear Water Bay, Kowloon, Hong Kong , People's Republic of China
| | - Zilong Wen
- State Key Laboratory of Molecular Neuroscience and Center of Systems Biology and Human Health, the Hong Kong University of Science and Technology 2 Division of Life Science , , Clear Water Bay, Kowloon, Hong Kong , People's Republic of China
- Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen Peking University−Hong Kong University of Science and Technology Medical Center 4 , Shenzhen 518055 , China
| | - Jin Xu
- School of Medicine, South China University of Technology 1 Laboratory of Immunology & Regeneration , , Guangzhou 510006, China
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6
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Prajsnar TK, Serba JJ, Dekker BM, Gibson JF, Masud S, Fleming A, Johnston SA, Renshaw SA, Meijer AH. The autophagic response to Staphylococcus aureus provides an intracellular niche in neutrophils. Autophagy 2021; 17:888-902. [PMID: 32174246 PMCID: PMC8078660 DOI: 10.1080/15548627.2020.1739443] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 02/17/2020] [Accepted: 02/28/2020] [Indexed: 11/22/2022] Open
Abstract
Staphylococcus aureus is a major human pathogen causing multiple pathologies, from cutaneous lesions to life-threatening sepsis. Although neutrophils contribute to immunity against S. aureus, multiple lines of evidence suggest that these phagocytes can provide an intracellular niche for staphylococcal dissemination. However, the mechanism of neutrophil subversion by intracellular S. aureus remains unknown. Targeting of intracellular pathogens by macroautophagy/autophagy is recognized as an important component of host innate immunity, but whether autophagy is beneficial or detrimental to S. aureus-infected hosts remains controversial. Here, using larval zebrafish, we showed that the autophagy marker Lc3 rapidly decorates S. aureus following engulfment by macrophages and neutrophils. Upon phagocytosis by neutrophils, Lc3-positive, non-acidified spacious phagosomes are formed. This response is dependent on phagocyte NADPH oxidase as both cyba/p22phox knockdown and diphenyleneiodonium (DPI) treatment inhibited Lc3 decoration of phagosomes. Importantly, NADPH oxidase inhibition diverted neutrophil S. aureus processing into tight acidified vesicles, which resulted in increased host resistance to the infection. Some intracellular bacteria within neutrophils were also tagged by Sqstm1/p62-GFP fusion protein and loss of Sqstm1 impaired host defense. Together, we have shown that intracellular handling of S. aureus by neutrophils is best explained by Lc3-associated phagocytosis (LAP), which appears to provide an intracellular niche for bacterial pathogenesis, while the selective autophagy receptor Sqstm1 is host-protective. The antagonistic roles of LAP and Sqstm1-mediated pathways in S. aureus-infected neutrophils may explain the conflicting reports relating to anti-staphylococcal autophagy and provide new insights for therapeutic strategies against antimicrobial-resistant Staphylococci.Abbreviations: ATG: autophagy related; CFU: colony-forming units; CMV: cytomegalovirus; Cyba/P22phox: cytochrome b-245, alpha polypeptide; DMSO: dimethyl sulfoxide; DPI: diphenyleneiodonium; EGFP: enhanced green fluorescent protein; GFP: green fluorescent protein; hpf: hours post-fertilization; hpi: hours post-infection; Irf8: interferon regulatory factor 8; LAP: LC3-associated phagocytosis; lyz: lysozyme; LWT: london wild type; Map1lc3/Lc3: microtubule-associated protein 1 light chain 3; NADPH oxidase: nicotinamide adenine dinucleotide phosphate oxidase; RFP: red fluorescent protein; ROS: reactive oxygen species; RT-PCR: reverse transcriptase polymerase chain reaction; Sqstm1/p62: sequestosome 1; Tg: transgenic; TSA: tyramide signal amplification.
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Affiliation(s)
- Tomasz K. Prajsnar
- Bateson Centre and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
- Institute of Biology Leiden, Faculty of Science, Leiden University, Leiden, The Netherlands
| | - Justyna J. Serba
- Bateson Centre and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Bernice M. Dekker
- Institute of Biology Leiden, Faculty of Science, Leiden University, Leiden, The Netherlands
| | - Josie F. Gibson
- Bateson Centre and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
- Krebs Institute and Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, UK
| | - Samrah Masud
- Institute of Biology Leiden, Faculty of Science, Leiden University, Leiden, The Netherlands
| | - Angeleen Fleming
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Simon A. Johnston
- Bateson Centre and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Stephen A. Renshaw
- Bateson Centre and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Annemarie H. Meijer
- Institute of Biology Leiden, Faculty of Science, Leiden University, Leiden, The Netherlands
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Campos-Sánchez JC, Esteban MÁ. Review of inflammation in fish and value of the zebrafish model. JOURNAL OF FISH DISEASES 2021; 44:123-139. [PMID: 33236349 DOI: 10.1111/jfd.13310] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 05/28/2023]
Abstract
Inflammation is a crucial step in the development of chronic diseases in humans. Understanding the inflammation environment and its intrinsic mechanisms when it is produced by harmful stimuli may be a key element in the development of human disease diagnosis. In recent decades, zebrafish (Danio rerio) have been widely used in research, due to their exceptional characteristics, as a model of various human diseases. Interestingly, the mediators released during the inflammatory response of both the immune system and nervous system, after its integration in the hypothalamus, could also facilitate the detection of injury through the register of behavioural changes in the fish. Although there are many studies that give well-defined information separately on such elements as the recruitment of cells, the release of pro- and anti-inflammatory mediators or the type of neurotransmitters released against different triggers, to the best of our knowledge there are no reviews that put all this knowledge together. In the present review, the main available information on inflammation in zebrafish is presented in order to facilitate knowledge about this important process of innate immunity, as well as the stress responses and behavioural changes derived from it.
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Affiliation(s)
- Jose Carlos Campos-Sánchez
- Department of Cell Biology and Histology, Faculty of Biology, Immunobiology for Aquaculture Group, University of Murcia, Murcia, Spain
| | - María Ángeles Esteban
- Department of Cell Biology and Histology, Faculty of Biology, Immunobiology for Aquaculture Group, University of Murcia, Murcia, Spain
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Yu T, Kuang H, Chen J, Lin X, Wu Y, Chen K, Zhang M, Zhang W, Wen Z. Tripartite-motif family protein 35-28 regulates microglia development by preventing necrotic death of microglial precursors in zebrafish. J Biol Chem 2020; 295:8846-8856. [PMID: 32398256 DOI: 10.1074/jbc.ra119.012043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 05/04/2020] [Indexed: 02/02/2023] Open
Abstract
Microglia are tissue-resident macrophages in the central nervous system (CNS) that play essential roles in the regulation of CNS development and homeostasis. Yet, the genetic networks governing microglia development remain incompletely defined. Here, we report the identification and characterization of a microglia-defective zebrafish mutant wulonghkz12 (wulhkz12 ) isolated from an ethylnitrosourea (ENU)-based genetic screen. We show that wulhkz12 mutants harbors a missense point mutation in the gene region encoding the PRY/SPRY domain of the tripartite-motif family protein 35-28 (trim35-28) gene. Time-lapse imaging revealed that the loss of Trim35-28 function causes lytic necrosis of microglial precursors/peripheral macrophages, as indicated by cytoplasmic swelling and membrane rupture of these precursors and accompanied by neutrophil infiltration and systemic inflammation. Intriguingly, the lytic necrosis of microglial precursors in trim35-28-deficient mutants appeared to depend neither on the canonical pyroptotic nor necroptotic pathways, as inhibition of the key component in each pathway could not rescue the microglia phenotype in trim35-28-deficient mutants. Finally, results from tissue-specific rescue experiments suggested that Trim35-28 acts cell-autonomously in the survival of microglial precursors. Taken together, the findings of our study reveal Trim35-28 as a regulatory protein essential for microglia development.
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Affiliation(s)
- Tao Yu
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University- The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Haoyue Kuang
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University- The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Jiahao Chen
- Department of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangdong, Guangzhou, China
| | - Xi Lin
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yi Wu
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University- The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Keyu Chen
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, China
| | - Mingjie Zhang
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University- The Hong Kong University of Science and Technology Medical Center, Shenzhen, China; Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, China
| | - Wenqing Zhang
- Department of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangdong, Guangzhou, China.
| | - Zilong Wen
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University- The Hong Kong University of Science and Technology Medical Center, Shenzhen, China; Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, China.
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9
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Wang L, Gao S, Wang H, Xue C, Liu X, Yuan H, Wang Z, Chen S, Chen Z, de Thé H, Zhang Y, Zhang W, Zhu J, Zhou J. Interferon regulatory factor 2 binding protein 2b regulates neutrophil versus macrophage fate during zebrafish definitive myelopoiesis. Haematologica 2020; 105:325-337. [PMID: 31123027 PMCID: PMC7012491 DOI: 10.3324/haematol.2019.217596] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 05/20/2019] [Indexed: 12/15/2022] Open
Abstract
Aproper choice of neutrophil-macrophage progenitor cell fate is essential for the generation of adequate myeloid subpopulations during embryonic development and in adulthood. The network governing neutrophil-macrophage progenitor cell fate has several key determinants, such as myeloid master regulators CCAAT enhancer binding protein alpha (C/EBPα) and spleen focus forming virus proviral integration oncogene (PU.1). Nevertheless, more regulators remain to be identified and characterized. To ensure balanced commitment of neutrophil-macrophage progenitors toward each lineage, the interplay among these determinants is not only synergistic, but also antagonistic. Depletion of interferon regulatory factor 2 binding protein 2b (Irf2bp2b), a well-known negative transcription regulator, results in a bias in neutrophil-macrophage progenitor cell fate in favor of macrophages at the expense of neutrophils during the stage of definitive myelopoiesis in zebrafish embryos. Mechanistic studies indicate that Irf2bp2b acts as a downstream target of C/EBPα, repressing PU.1 expression, and that SUMOylation confers the repressive function of Irf2bp2b. Thus, Irf2bp2b is a novel determinant in the choice of fate of neutrophil-macrophage progenitor cells.
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Affiliation(s)
- Luxiang Wang
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuo Gao
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haihong Wang
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chang Xue
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaohui Liu
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Yuan
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zixuan Wang
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Saijuan Chen
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhu Chen
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hugues de Thé
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Université de Paris 7/INSERM/CNRS UMR 944/7212, Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Paris, France
| | - Yiyue Zhang
- Division of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangzhou, China
| | - Wenqing Zhang
- Division of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangzhou, China
| | - Jun Zhu
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China .,Université de Paris 7/INSERM/CNRS UMR 944/7212, Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Paris, France
| | - Jun Zhou
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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10
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Rosowski EE. Determining macrophage versus neutrophil contributions to innate immunity using larval zebrafish. Dis Model Mech 2020; 13:13/1/dmm041889. [PMID: 31932292 PMCID: PMC6994940 DOI: 10.1242/dmm.041889] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The specific roles of the two major innate immune cell types – neutrophils and macrophages – in response to infection and sterile inflammation are areas of great interest. The larval zebrafish model of innate immunity, and the imaging capabilities it provides, is a source of new research and discoveries in this field. Multiple methods have been developed in larval zebrafish to specifically deplete functional macrophages or neutrophils. Each of these has pros and cons, as well as caveats, that often make it difficult to directly compare results from different studies. The purpose of this Review is to (1) explore the pros, cons and caveats of each of these immune cell-depleted models; (2) highlight and place into a broader context recent key findings on the specific functions of innate immune cells using these models; and (3) explore future directions in which immune cell depletion methods are being expanded. Summary: Macrophages and neutrophils are distinct innate immune cells with diverse roles in diverse inflammatory contexts. Recent research in larval zebrafish using cell-specific depletion methods has revealed new insights into these cells' functions.
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Affiliation(s)
- Emily E Rosowski
- Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA
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11
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Sommer F, Torraca V, Kamel SM, Lombardi A, Meijer AH. Frontline Science: Antagonism between regular and atypical Cxcr3 receptors regulates macrophage migration during infection and injury in zebrafish. J Leukoc Biol 2019; 107:185-203. [PMID: 31529512 PMCID: PMC7028096 DOI: 10.1002/jlb.2hi0119-006r] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 07/11/2019] [Accepted: 09/04/2019] [Indexed: 12/17/2022] Open
Abstract
The CXCR3‐CXCL11 chemokine‐signaling axis plays an essential role in infection and inflammation by orchestrating leukocyte trafficking in human and animal models, including zebrafish. Atypical chemokine receptors (ACKRs) play a fundamental regulatory function in signaling networks by shaping chemokine gradients through their ligand scavenging function, while being unable to signal in the classic G‐protein‐dependent manner. Two copies of the CXCR3 gene in zebrafish, cxcr3.2 and cxcr3.3, are expressed on macrophages and share a highly conserved ligand‐binding site. However, Cxcr3.3 has structural characteristics of ACKRs indicative of a ligand‐scavenging role. In contrast, we previously showed that Cxcr3.2 is an active CXCR3 receptor because it is required for macrophage motility and recruitment to sites of mycobacterial infection. In this study, we generated a cxcr3.3 CRISPR‐mutant to functionally dissect the antagonistic interplay among the cxcr3 paralogs in the immune response. We observed that cxcr3.3 mutants are more susceptible to mycobacterial infection, whereas cxcr3.2 mutants are more resistant. Furthermore, macrophages in the cxcr3.3 mutant are more motile, show higher activation status, and are recruited more efficiently to sites of infection or injury. Our results suggest that Cxcr3.3 is an ACKR that regulates the activity of Cxcr3.2 by scavenging common ligands and that silencing the scavenging function of Cxcr3.3 results in an exacerbated Cxcr3.2 signaling. In human, splice variants of CXCR3 have antagonistic functions and CXCR3 ligands also interact with ACKRs. Therefore, in zebrafish, an analogous regulatory mechanism appears to have evolved after the cxcr3 gene duplication event, through diversification of conventional and atypical receptor variants.
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Affiliation(s)
- Frida Sommer
- Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Vincenzo Torraca
- Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Sarah M Kamel
- Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Amber Lombardi
- Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
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12
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Developmental protein kinase C hyper-activation results in microcephaly and behavioral abnormalities in zebrafish. Transl Psychiatry 2018; 8:232. [PMID: 30352990 PMCID: PMC6199330 DOI: 10.1038/s41398-018-0285-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 08/13/2018] [Accepted: 09/10/2018] [Indexed: 12/19/2022] Open
Abstract
Susceptible genetic polymorphisms and altered expression levels of protein kinase C (PKC)-encoding genes suggest overactivation of PKC in autism spectrum disorder (ASD) development. To delineate the pathological role of PKC, we pharmacologically stimulated its activity during the early development of zebrafish. Results demonstrated that PKC hyper-activation perturbs zebrafish development and induces a long-lasting head size deficit. The anatomical and cellular analysis revealed reduced neural precursor proliferation and newborn neuron formation. β-Catenin that is essential for brain growth is dramatically degraded. Stabilization of β-catenin by gsk3β inhibition partially restores the head size deficit. In addition, the neuropathogenic effect of developmental PKC hyper-activation was further supported by the alterations in the behavioral domain including motor abnormalities, heightened stress reactivity and impaired habituation learning. Taken together, by causally connecting early-life PKC hyper-activation to these neuropathological traits and the impaired neurogenesis, these results suggest that PKC could be a critical pathway in ASD pathogenesis.
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13
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van Leeuwen LM, Boot M, Kuijl C, Picavet DI, van Stempvoort G, van der Pol SM, de Vries HE, van der Wel NN, van der Kuip M, van Furth AM, van der Sar AM, Bitter W. Mycobacteria employ two different mechanisms to cross the blood-brain barrier. Cell Microbiol 2018; 20:e12858. [PMID: 29749044 PMCID: PMC6175424 DOI: 10.1111/cmi.12858] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 03/27/2018] [Accepted: 04/23/2018] [Indexed: 12/16/2022]
Abstract
Central nervous system (CNS) infection by Mycobacterium tuberculosis is one of the most devastating complications of tuberculosis, in particular in early childhood. In order to induce CNS infection, M. tuberculosis needs to cross specialised barriers protecting the brain. How M. tuberculosis crosses the blood-brain barrier (BBB) and enters the CNS is not well understood. Here, we use transparent zebrafish larvae and the closely related pathogen Mycobacterium marinum to answer this question. We show that in the early stages of development, mycobacteria rapidly infect brain tissue, either as free mycobacteria or within circulating macrophages. After the formation of a functionally intact BBB, the infiltration of brain tissue by infected macrophages is delayed, but not blocked, suggesting that crossing the BBB via phagocytic cells is one of the mechanisms used by mycobacteria to invade the CNS. Interestingly, depletion of phagocytic cells did not prevent M. marinum from infecting the brain tissue, indicating that free mycobacteria can independently cause brain infection. Detailed analysis showed that mycobacteria are able to cause vasculitis by extracellular outgrowth in the smaller blood vessels and by infecting endothelial cells. Importantly, we could show that this second mechanism is an active process that depends on an intact ESX-1 secretion system, which extends the role of ESX-1 secretion beyond the macrophage infection cycle.
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Affiliation(s)
- Lisanne M. van Leeuwen
- Medical Microbiology and Infection ControlVU Medical CenterAmsterdamThe Netherlands
- Paediatric Infectious Diseases and ImmunologyVU Medical CenterAmsterdamThe Netherlands
| | - Maikel Boot
- Medical Microbiology and Infection ControlVU Medical CenterAmsterdamThe Netherlands
| | - Coen Kuijl
- Medical Microbiology and Infection ControlVU Medical CenterAmsterdamThe Netherlands
| | - Daisy I. Picavet
- Cell Biology and Histology, Electron Microscopy Centre AmsterdamAcademic Medical CentreAmsterdamThe Netherlands
| | - Gunny van Stempvoort
- Medical Microbiology and Infection ControlVU Medical CenterAmsterdamThe Netherlands
| | - Susanne M.A. van der Pol
- Molecular Cell Biology and Immunology, Amsterdam NeuroscienceVU Medical CenterAmsterdamThe Netherlands
| | - Helga E. de Vries
- Molecular Cell Biology and Immunology, Amsterdam NeuroscienceVU Medical CenterAmsterdamThe Netherlands
| | - Nicole N. van der Wel
- Cell Biology and Histology, Electron Microscopy Centre AmsterdamAcademic Medical CentreAmsterdamThe Netherlands
| | - Martijn van der Kuip
- Paediatric Infectious Diseases and ImmunologyVU Medical CenterAmsterdamThe Netherlands
| | | | | | - Wilbert Bitter
- Medical Microbiology and Infection ControlVU Medical CenterAmsterdamThe Netherlands
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14
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Rosowski EE, Raffa N, Knox BP, Golenberg N, Keller NP, Huttenlocher A. Macrophages inhibit Aspergillus fumigatus germination and neutrophil-mediated fungal killing. PLoS Pathog 2018; 14:e1007229. [PMID: 30071103 PMCID: PMC6091969 DOI: 10.1371/journal.ppat.1007229] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 08/14/2018] [Accepted: 07/18/2018] [Indexed: 01/11/2023] Open
Abstract
In immunocompromised individuals, Aspergillus fumigatus causes invasive fungal disease that is often difficult to treat. Exactly how immune mechanisms control A. fumigatus in immunocompetent individuals remains unclear. Here, we use transparent zebrafish larvae to visualize and quantify neutrophil and macrophage behaviors in response to different A. fumigatus strains. We find that macrophages form dense clusters around spores, establishing a protective niche for fungal survival. Macrophages exert these protective effects by inhibiting fungal germination, thereby inhibiting subsequent neutrophil recruitment and neutrophil-mediated killing. Germination directly drives fungal clearance as faster-growing CEA10-derived strains are killed better in vivo than slower-growing Af293-derived strains. Additionally, a CEA10 pyrG-deficient strain with impaired germination is cleared less effectively by neutrophils. Host inflammatory activation through Myd88 is required for killing of a CEA10-derived strain but not sufficient for killing of an Af293-derived strain, further demonstrating the role of fungal-intrinsic differences in the ability of a host to clear an infection. Altogether, we describe a new role for macrophages in the persistence of A. fumigatus and highlight the ability of different A. fumigatus strains to adopt diverse modes of virulence. Immunocompromised patients are susceptible to invasive fungal infections, including aspergillosis. However, healthy humans inhale spores of the fungus Aspergillus fumigatus from the environment every day without becoming sick, and how the immune system clears this infection is still obscure. Additionally, there are many different strains of A. fumigatus, and whether the pathogenesis of these different strains varies is also largely unknown. To investigate these questions, we infected larval zebrafish with A. fumigatus spores derived from two genetically diverse strains. Larval zebrafish allow for visualization of fungal growth and innate immune cell behavior in live, intact animals. We find that differences in the rate of growth between strains directly affect fungal persistence. In both wild-type and macrophage-deficient zebrafish larvae, a fast-germinating strain is actually cleared better than a slow-germinating strain. This fungal killing is driven primarily by neutrophils while macrophages promote fungal persistence by inhibiting spore germination. Our experiments underline different mechanisms of virulence that pathogens can utilize—rapid growth versus dormancy and persistence—and inform future strategies for fighting fungal infections in susceptible immunocompromised patients.
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Affiliation(s)
- Emily E. Rosowski
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Nicholas Raffa
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Benjamin P. Knox
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Netta Golenberg
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Graduate Program in Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Nancy P. Keller
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
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15
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Ellett F, Pazhakh V, Pase L, Benard EL, Weerasinghe H, Azabdaftari D, Alasmari S, Andrianopoulos A, Lieschke GJ. Macrophages protect Talaromyces marneffei conidia from myeloperoxidase-dependent neutrophil fungicidal activity during infection establishment in vivo. PLoS Pathog 2018; 14:e1007063. [PMID: 29883484 PMCID: PMC6010348 DOI: 10.1371/journal.ppat.1007063] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/20/2018] [Accepted: 04/30/2018] [Indexed: 12/21/2022] Open
Abstract
Neutrophils and macrophages provide the first line of cellular defence against pathogens once physical barriers are breached, but can play very different roles for each specific pathogen. This is particularly so for fungal pathogens, which can occupy several niches in the host. We developed an infection model of talaromycosis in zebrafish embryos with the thermally-dimorphic intracellular fungal pathogen Talaromyces marneffei and used it to define different roles of neutrophils and macrophages in infection establishment. This system models opportunistic human infection prevalent in HIV-infected patients, as zebrafish embryos have intact innate immunity but, like HIV-infected talaromycosis patients, lack a functional adaptive immune system. Importantly, this new talaromycosis model permits thermal shifts not possible in mammalian models, which we show does not significantly impact on leukocyte migration, phagocytosis and function in an established Aspergillus fumigatus model. Furthermore, the optical transparency of zebrafish embryos facilitates imaging of leukocyte/pathogen interactions in vivo. Following parenteral inoculation, T. marneffei conidia were phagocytosed by both neutrophils and macrophages. Within these different leukocytes, intracellular fungal form varied, indicating that triggers in the intracellular milieu can override thermal morphological determinants. As in human talaromycosis, conidia were predominantly phagocytosed by macrophages rather than neutrophils. Macrophages provided an intracellular niche that supported yeast morphology. Despite their minor role in T. marneffei conidial phagocytosis, neutrophil numbers increased during infection from a protective CSF3-dependent granulopoietic response. By perturbing the relative abundance of neutrophils and macrophages during conidial inoculation, we demonstrate that the macrophage intracellular niche favours infection establishment by protecting conidia from a myeloperoxidase-dependent neutrophil fungicidal activity. These studies provide a new in vivo model of talaromycosis with several advantages over previous models. Our findings demonstrate that limiting T. marneffei's opportunity for macrophage parasitism and thereby enhancing this pathogen's exposure to effective neutrophil fungicidal mechanisms may represent a novel host-directed therapeutic opportunity.
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Affiliation(s)
- Felix Ellett
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
- Cancer and Haematology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Vahid Pazhakh
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Luke Pase
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
- Cancer and Haematology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Erica L. Benard
- Cancer and Haematology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Harshini Weerasinghe
- Genetics, Genomics and Systems Biology, School of BioSciences, University of Melbourne, Victoria, Australia
| | - Denis Azabdaftari
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Sultan Alasmari
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Alex Andrianopoulos
- Genetics, Genomics and Systems Biology, School of BioSciences, University of Melbourne, Victoria, Australia
| | - Graham J. Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
- Cancer and Haematology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
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16
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Protective efficacy of recombinant BCG over-expressing protective, stage-specific antigens of Mycobacterium tuberculosis. Vaccine 2018; 36:2619-2629. [PMID: 29627232 DOI: 10.1016/j.vaccine.2018.03.066] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 02/21/2018] [Accepted: 03/24/2018] [Indexed: 01/13/2023]
Abstract
Tuberculosis (TB) remains a major cause of mortality and morbidity worldwide, yet current control strategies, including the existing BCG vaccine, have had little impact on disease control. CysVac2, a fusion protein comprising stage-specific Mycobacterium tuberculosis antigens, provided superior protective efficacy against chronic M. tuberculosis infection in mice, compared to BCG. To determine if the delivery of CysVac2 in the context of BCG could improve BCG-induced immunity and protection, we generated a recombinant strain of BCG overexpressing CysVac2 (rBCG:CysVac2). Expression of CysVac2 in BCG was facilitated by the M. tuberculosis hspX promoter, which is highly induced inside phagocytic cells and induces strong cellular immune responses to antigens expressed under its regulation. Intradermal vaccination with rBCG:CysVac2 resulted in increased monocyte/macrophage recruitment and enhanced antigen-specific CD4+ T cell priming compared to parental BCG, indicating CysVac2 overexpression had a marked effect on rBCG induced-immunity. Further, rBCG:CysVac2 was a more potent inducer of antigen-specific multifunctional CD4+ T cells (CD4+IFN-γ+TNF+IL-2+) than BCG after vaccination of mice. This improved immunogenicity however did not influence protective efficacy, with both BCG and rBCG:CysVac2 affording comparable level of protection aerosol infection with M. tuberculosis. Boosting either BCG or rBCG:CysVac2 with the CysVac2 fusion protein resulted in a similar improvement in protective efficacy. These results demonstrate that the expression of protective antigens in BCG can augment antigen-specific immunity after vaccination but does not alter protection against infection, further highlighting the challenge of developing effective vaccines to control TB.
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17
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Gore AV, Pillay LM, Venero Galanternik M, Weinstein BM. The zebrafish: A fintastic model for hematopoietic development and disease. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2018; 7:e312. [PMID: 29436122 DOI: 10.1002/wdev.312] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/30/2017] [Accepted: 12/03/2017] [Indexed: 12/19/2022]
Abstract
Hematopoiesis is a complex process with a variety of different signaling pathways influencing every step of blood cell formation from the earliest precursors to final differentiated blood cell types. Formation of blood cells is crucial for survival. Blood cells carry oxygen, promote organ development and protect organs in different pathological conditions. Hematopoietic stem and progenitor cells (HSPCs) are responsible for generating all adult differentiated blood cells. Defects in HSPCs or their downstream lineages can lead to anemia and other hematological disorders including leukemia. The zebrafish has recently emerged as a powerful vertebrate model system to study hematopoiesis. The developmental processes and molecular mechanisms involved in zebrafish hematopoiesis are conserved with higher vertebrates, and the genetic and experimental accessibility of the fish and the optical transparency of its embryos and larvae make it ideal for in vivo analysis of hematopoietic development. Defects in zebrafish hematopoiesis reliably phenocopy human blood disorders, making it a highly attractive model system to screen small molecules to design therapeutic strategies. In this review, we summarize the key developmental processes and molecular mechanisms of zebrafish hematopoiesis. We also discuss recent findings highlighting the strengths of zebrafish as a model system for drug discovery against hematopoietic disorders. This article is categorized under: Adult Stem Cells, Tissue Renewal, and Regeneration > Stem Cell Differentiation and Reversion Vertebrate Organogenesis > Musculoskeletal and Vascular Nervous System Development > Vertebrates: Regional Development Comparative Development and Evolution > Organ System Comparisons Between Species.
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Affiliation(s)
- Aniket V Gore
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, Maryland
| | - Laura M Pillay
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, Maryland
| | - Marina Venero Galanternik
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, Maryland
| | - Brant M Weinstein
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, Maryland
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18
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Yu SH, Zhu KY, Zhang F, Wang J, Yuan H, Chen Y, Jin Y, Dong M, Wang L, Jia XE, Gao L, Dong ZW, Ren CG, Chen LT, Huang QH, Deng M, Zon LI, Zhou Y, Zhu J, Xu PF, Liu TX. The histone demethylase Jmjd3 regulates zebrafish myeloid development by promoting spi1 expression. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1861:106-116. [PMID: 29378332 DOI: 10.1016/j.bbagrm.2017.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/29/2017] [Accepted: 12/20/2017] [Indexed: 01/01/2023]
Abstract
The histone demethylase Jmjd3 plays a critical role in cell lineage specification and differentiation at various stages of development. However, its function during normal myeloid development remains poorly understood. Here, we carried out a systematic in vivo screen of epigenetic factors for their function in hematopoiesis and identified Jmjd3 as a new epigenetic factor that regulates myelopoiesis in zebrafish. We demonstrated that jmjd3 was essential for zebrafish primitive and definitive myelopoiesis, knockdown of jmjd3 suppressed the myeloid commitment and enhanced the erythroid commitment. Only overexpression of spi1 but not the other myeloid regulators rescued the myeloid development in jmjd3 morphants. Furthermore, preliminary mechanistic studies demonstrated that Jmjd3 could directly bind to the spi1 regulatory region to alleviate the repressive H3K27me3 modification and activate spi1 expression. Thus, our studies highlight that Jmjd3 is indispensable for early zebrafish myeloid development by promoting spi1 expression.
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Affiliation(s)
- Shan-He Yu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China.
| | - Kang-Yong Zhu
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Fan Zhang
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Juan Wang
- Department of Bioinformatics, School of Life Science and Technology, Tongji University, Shanghai 200092, China
| | - Hao Yuan
- Sino-French Research Center for Life Sciences and Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yi Chen
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Yi Jin
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Mei Dong
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Lei Wang
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Xiao-E Jia
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Lei Gao
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Zhi-Wei Dong
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Chun-Guang Ren
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Li-Ting Chen
- Tongji hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qiu-Hua Huang
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China
| | - Min Deng
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
| | - Leonard I Zon
- Harvard Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Stem Cell Program and Division of Hematology/Oncology, Boston Children's Hospital, Pediatric Hematology/Oncology at Dana Farber Cancer Institute, Harvard Stem Cell Institute, Harvard Medical School and Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Yi Zhou
- Harvard Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Stem Cell Program and Division of Hematology/Oncology, Boston Children's Hospital, Pediatric Hematology/Oncology at Dana Farber Cancer Institute, Harvard Stem Cell Institute, Harvard Medical School and Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Jiang Zhu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China.
| | - Peng-Fei Xu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China.
| | - Ting-Xi Liu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Rui-Jin Hospital affiliated to Shanghai Jiao-Tong University School of Medicine, Shanghai 200025, China; Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai 200031, China
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19
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Tokarz DA, Heffelfinger AK, Jima DD, Gerlach J, Shah RN, Rodriguez-Nunez I, Kortum AN, Fletcher AA, Nordone SK, Law JM, Heber S, Yoder JA. Disruption of Trim9 function abrogates macrophage motility in vivo. J Leukoc Biol 2017; 102:1371-1380. [PMID: 29021367 DOI: 10.1189/jlb.1a0816-371r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 09/01/2017] [Accepted: 09/26/2017] [Indexed: 11/24/2022] Open
Abstract
The vertebrate immune response comprises multiple molecular and cellular components that interface to provide defense against pathogens. Because of the dynamic complexity of the immune system and its interdependent innate and adaptive functionality, an understanding of the whole-organism response to pathogen exposure remains unresolved. Zebrafish larvae provide a unique model for overcoming this obstacle, because larvae are protected against pathogens while lacking a functional adaptive immune system during the first few weeks of life. Zebrafish larvae were exposed to immune agonists for various lengths of time, and a microarray transcriptome analysis was executed. This strategy identified known immune response genes, as well as genes with unknown immune function, including the E3 ubiquitin ligase tripartite motif-9 (Trim9). Although trim9 expression was originally described as "brain specific," its expression has been reported in stimulated human Mϕs. In this study, we found elevated levels of trim9 transcripts in vivo in zebrafish Mϕs after immune stimulation. Trim9 has been implicated in axonal migration, and we therefore investigated the impact of Trim9 disruption on Mϕ motility and found that Mϕ chemotaxis and cellular architecture are subsequently impaired in vivo. These results demonstrate that Trim9 mediates cellular movement and migration in Mϕs as well as neurons.
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Affiliation(s)
- Debra A Tokarz
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Amy K Heffelfinger
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Dereje D Jima
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA.,Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina, USA.,Bioinformatics Research Center, North Carolina State University, Raleigh, North Carolina, USA
| | - Jamie Gerlach
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Radhika N Shah
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Ivan Rodriguez-Nunez
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Amanda N Kortum
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Ashley A Fletcher
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Shila K Nordone
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - J McHugh Law
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA.,Department of Population Health and Pathobiology, North Carolina State University, Raleigh, North Carolina, USA; and
| | - Steffen Heber
- Department of Computer Science, North Carolina State University, Raleigh, North Carolina, USA
| | - Jeffrey A Yoder
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA; .,Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
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20
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Activation of liver stromal cells is associated with male-biased liver tumor initiation in xmrk and Myc transgenic zebrafish. Sci Rep 2017; 7:10315. [PMID: 28871112 PMCID: PMC5583234 DOI: 10.1038/s41598-017-10529-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/09/2017] [Indexed: 02/07/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is more prevalent in men than in women. Previously we have found that some stromal cells, including hepatic stellate cells (HSCs), neutrophils and macrophages, play crucial roles in promoting sex disparity in krasV12-induced zebrafish HCC. The activation of HSCs is mediated by serotonin while activation of neutrophils and macrophages is mediated by cortisol. To ensure that these findings are also applicable to other oncogene induced tumors, stromal cell activation was compared between male and female fish during liver tumorigenesis initiated by xmrk or Myc oncogene. Consistently, we observed male-biased liver tumorigenesis in the xmrk and Myc models. In both models, there was a higher rate of HSC activation accompanied with a higher level of serotonin in male liver tumors. For tumor-infiltrated neutrophils and macrophages, significantly higher densities in male liver tumors were observed in both xmrk and Myc models. However, the male-biased increase of cortisol was observed only in xmrk- but not apparently in Myc expressing liver tumors. Overall, these observations are consistent with the observations in the kras liver tumor model, indicating that the serotonin- and cortisol-mediated pathways also play roles in sex disparity of liver tumors caused by other molecular pathways.
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21
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Masud S, Torraca V, Meijer AH. Modeling Infectious Diseases in the Context of a Developing Immune System. Curr Top Dev Biol 2016; 124:277-329. [PMID: 28335862 DOI: 10.1016/bs.ctdb.2016.10.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Zebrafish has been used for over a decade to study the mechanisms of a wide variety of inflammatory disorders and infections, with models ranging from bacterial, viral, to fungal pathogens. Zebrafish has been especially relevant to study the differentiation, specialization, and polarization of the two main innate immune cell types, the macrophages and the neutrophils. The optical accessibility and the early appearance of myeloid cells that can be tracked with fluorescent labels in zebrafish embryos and the ability to use genetics to selectively ablate or expand immune cell populations have permitted studying the interaction between infection, development, and metabolism. Additionally, zebrafish embryos are readily colonized by a commensal flora, which facilitated studies that emphasize the requirement for immune training by the natural microbiota to properly respond to pathogens. The remarkable conservation of core mechanisms required for the recognition of microbial and danger signals and for the activation of the immune defenses illustrates the high potential of the zebrafish model for biomedical research. This review will highlight recent insight that the developing zebrafish has contributed to our understanding of host responses to invading microbes and the involvement of the microbiome in several physiological processes. These studies are providing a mechanistic basis for developing novel therapeutic approaches to control infectious diseases.
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Affiliation(s)
- Samrah Masud
- Institute of Biology, Leiden University, Leiden, The Netherlands
| | - Vincenzo Torraca
- Institute of Biology, Leiden University, Leiden, The Netherlands
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22
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Cronan MR, Beerman RW, Rosenberg AF, Saelens JW, Johnson MG, Oehlers SH, Sisk DM, Jurcic Smith KL, Medvitz NA, Miller SE, Trinh LA, Fraser SE, Madden JF, Turner J, Stout JE, Lee S, Tobin DM. Macrophage Epithelial Reprogramming Underlies Mycobacterial Granuloma Formation and Promotes Infection. Immunity 2016; 45:861-876. [PMID: 27760340 PMCID: PMC5268069 DOI: 10.1016/j.immuni.2016.09.014] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 07/21/2016] [Accepted: 07/29/2016] [Indexed: 01/23/2023]
Abstract
Mycobacterium tuberculosis infection in humans triggers formation of granulomas, which are tightly organized immune cell aggregates that are the central structure of tuberculosis. Infected and uninfected macrophages interdigitate, assuming an altered, flattened appearance. Although pathologists have described these changes for over a century, the molecular and cellular programs underlying this transition are unclear. Here, using the zebrafish-Mycobacterium marinum model, we found that mycobacterial granuloma formation is accompanied by macrophage induction of canonical epithelial molecules and structures. We identified fundamental macrophage reprogramming events that parallel E-cadherin-dependent mesenchymal-epithelial transitions. Macrophage-specific disruption of E-cadherin function resulted in disordered granuloma formation, enhanced immune cell access, decreased bacterial burden, and increased host survival, suggesting that the granuloma can also serve a bacteria-protective role. Granuloma macrophages in humans with tuberculosis were similarly transformed. Thus, during mycobacterial infection, granuloma macrophages are broadly reprogrammed by epithelial modules, and this reprogramming alters the trajectory of infection and the associated immune response.
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Affiliation(s)
- Mark R Cronan
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Rebecca W Beerman
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Allison F Rosenberg
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Joseph W Saelens
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Matthew G Johnson
- Division of Infectious Diseases, Duke University School of Medicine, Durham, NC 27710, USA; Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Stefan H Oehlers
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Dana M Sisk
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Kristen L Jurcic Smith
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA; Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Neil A Medvitz
- Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Sara E Miller
- Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Le A Trinh
- Molecular and Computational Biology and Translational Imaging Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Scott E Fraser
- Molecular and Computational Biology and Translational Imaging Center, University of Southern California, Los Angeles, CA 90089, USA
| | - John F Madden
- Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Joanne Turner
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA; Center for Microbial Interface Biology, The Ohio State University, Columbus, OH 43210, USA
| | - Jason E Stout
- Division of Infectious Diseases, Duke University School of Medicine, Durham, NC 27710, USA; Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Sunhee Lee
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA; Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - David M Tobin
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA; Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA.
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23
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Boot M, Sparrius M, Jim KK, Commandeur S, Speer A, van de Weerd R, Bitter W. iniBAC induction Is Vitamin B12- and MutAB-dependent in Mycobacterium marinum. J Biol Chem 2016; 291:19800-19812. [PMID: 27474746 PMCID: PMC5025670 DOI: 10.1074/jbc.m116.724088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 07/01/2016] [Indexed: 01/29/2024] Open
Abstract
Tuberculosis can be treated with a 6-month regimen of antibiotics. Although the targets of most of the first-line antibiotics have been identified, less research has focused on the intrabacterial stress responses that follow upon treatment with antibiotics. Studying the roles of these stress genes may lead to the identification of crucial stress-coping mechanisms that can provide additional drug targets to increase treatment efficacy. A three-gene operon with unknown function that is strongly up-regulated upon treatment with isoniazid and ethambutol is the iniBAC operon. We have reproduced these findings and show that iniBAC genes are also induced in infected host cells, although with higher variability. Next, we set out to elucidate the genetic network that results in iniBAC induction in Mycobacterium marinum By transposon mutagenesis, we identified that the operon is highly induced by mutations in genes encoding enzymes of the vitamin B12 biosynthesis pathway and the vitamin B12-dependent methylmalonyl-CoA-mutase MutAB. Lipid analysis showed that a mutA::tn mutant has decreased phthiocerol dimycocerosates levels, suggesting a link between iniBAC induction and the production of methyl-branched lipids. Moreover, a similar screen in Mycobacterium bovis BCG identified that phthiocerol dimycocerosate biosynthesis mutants cause the up-regulation of iniBAC genes. Based on these data, we propose that iniBAC is induced in response to mutations that cause defects in the biosynthesis of methyl-branched lipids. The resulting metabolic stress caused by these mutations or caused by ethambutol or isoniazid treatment may be relieved by iniBAC to increase the chance of bacterial survival.
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Affiliation(s)
- Maikel Boot
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Marion Sparrius
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Kin Ki Jim
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Susanna Commandeur
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Alexander Speer
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Robert van de Weerd
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Wilbert Bitter
- From the Department of Medical Microbiology and Infection Control, VU University Medical Center, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
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24
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Hosseini R, Lamers GEM, Soltani HM, Meijer AH, Spaink HP, Schaaf MJM. Efferocytosis and extrusion of leukocytes determine the progression of early mycobacterial pathogenesis. J Cell Sci 2016; 129:3385-95. [PMID: 27469488 DOI: 10.1242/jcs.135194] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 07/25/2016] [Indexed: 12/12/2022] Open
Abstract
Macrophages and neutrophils are the first responders to invading pathogens and contribute strongly to the host defense against intracellular pathogens. The collective interplay and dynamic interactions between these leukocytes are to a large extent not understood. In the present study, we have investigated their role using a combination of confocal laser-scanning and electron microscopy in a zebrafish model for tuberculosis, a local Mycobacterium marinum infection in the tissue of the larval tail fin. Our results show that neutrophils are efficient in phagocytosis of mycobacteria and that they contribute largely to their dissemination. Macrophages appear to play a major role in efferocytosis, phagocytosis of dead cells that contain bacterial content. Phagocytic cells with large bacterial aggregates are formed that can be extruded out of the tissue after cell death. Alternatively, these excessively infected cells can undergo necrosis leading to immediate recruitment of surrounding leukocytes and subsequent phagocytosis of released bacteria. Our data show that these necrotic burst events result in progression of the infection, whereas extrusion abates the infection.
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Affiliation(s)
- Rohola Hosseini
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
| | - Gerda E M Lamers
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
| | - Hiwa M Soltani
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
| | - Annemarie H Meijer
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
| | - Herman P Spaink
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
| | - Marcel J M Schaaf
- Institute of Biology Leiden, Leiden University, Leiden 2333CC, The Netherlands
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25
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Chatzopoulou A, Heijmans JPM, Burgerhout E, Oskam N, Spaink HP, Meijer AH, Schaaf MJM. Glucocorticoid-Induced Attenuation of the Inflammatory Response in Zebrafish. Endocrinology 2016; 157:2772-84. [PMID: 27219276 DOI: 10.1210/en.2015-2050] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Glucocorticoids are steroid hormones that are secreted upon stress. Their effects are mediated by the glucocorticoid receptor, which acts as a transcription factor. Because the antiinflammatory activity of glucocorticoids has been well established, they are widely used clinically to treat many inflammatory and immune-related diseases. However, the exact specificity, mechanisms, and level of regulation of different inflammatory pathways have not been fully elucidated. In the present study, a tail fin amputation assay was used in 3-day-old zebrafish larvae to study the immunomodulatory effects of the synthetic glucocorticoid beclomethasone. First, a transcriptome analysis was performed, which showed that upon amputation mainly immune-related genes are regulated. This regulation was inhibited by beclomethasone for 86% of regulated genes. For two immune-related genes, tlr4bb and alox5ap, the amputation-induced increase was not attenuated by beclomethasone. Alox5ap is involved in eicosanoid biosynthesis, but the increase in leukotriene B4 concentration upon amputation was abolished, and lipoxin A4 levels were unaffected by beclomethasone. Furthermore, we studied the migration of neutrophils and macrophages toward the wound site. Our results show that amputation induced migration of both types of leukocytes and that this migration was dependent on de novo protein synthesis. Beclomethasone treatment attenuated the migratory behavior of neutrophils in a glucocorticoid receptor-dependent manner but left the migration of macrophages unaffected. In conclusion, beclomethasone has a dramatic inhibitory effect on the amputation-induced proinflammatory gene regulation, and this is reflected in an inhibition of the neutrophil migration but not the migration of macrophages, which are likely to be involved in inflammation resolution.
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Affiliation(s)
| | | | - Erik Burgerhout
- Institute of Biology, Leiden University, 2333CC Leiden, The Netherlands
| | - Nienke Oskam
- Institute of Biology, Leiden University, 2333CC Leiden, The Netherlands
| | - Herman P Spaink
- Institute of Biology, Leiden University, 2333CC Leiden, The Netherlands
| | | | - Marcel J M Schaaf
- Institute of Biology, Leiden University, 2333CC Leiden, The Netherlands
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26
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Ates LS, van der Woude AD, Bestebroer J, van Stempvoort G, Musters RJP, Garcia-Vallejo JJ, Picavet DI, Weerd RVD, Maletta M, Kuijl CP, van der Wel NN, Bitter W. The ESX-5 System of Pathogenic Mycobacteria Is Involved In Capsule Integrity and Virulence through Its Substrate PPE10. PLoS Pathog 2016; 12:e1005696. [PMID: 27280885 PMCID: PMC4900558 DOI: 10.1371/journal.ppat.1005696] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 05/20/2016] [Indexed: 11/18/2022] Open
Abstract
Mycobacteria produce a capsule layer, which consists of glycan-like polysaccharides and a number of specific proteins. In this study, we show that, in slow-growing mycobacteria, the type VII secretion system ESX-5 plays a major role in the integrity and stability of the capsule. We have identified PPE10 as the ESX-5 substrate responsible for this effect. Mutants in esx-5 and ppe10 both have impaired capsule integrity as well as reduced surface hydrophobicity. Electron microscopy, immunoblot and flow cytometry analyses demonstrated reduced amounts of surface localized proteins and glycolipids, and morphological differences in the capsular layer. Since capsular proteins secreted by the ESX-1 system are important virulence factors, we tested the effect of the mutations that cause capsular defects on virulence mechanisms. Both esx-5 and ppe10 mutants of Mycobacterium marinum were shown to be impaired in ESX-1-dependent hemolysis. In agreement with this, the ppe10 and esx5 mutants showed reduced recruitment of ubiquitin in early macrophage infection and intermediate attenuation in zebrafish embryos. These results provide a pivotal role for the ESX-5 secretion system and its substrate PPE10, in the capsular integrity of pathogenic mycobacteria. These findings open up new roads for research on the mycobacterial capsule and its role in virulence and immune modulation.
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Affiliation(s)
- Louis S Ates
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands
| | - Aniek D van der Woude
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands.,Department of Molecular Microbiology, VU University, Amsterdam, the Netherlands
| | - Jovanka Bestebroer
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands
| | | | - René J P Musters
- Department of Physiology and Cardiology, VU University Medical Center, Amsterdam, the Netherlands
| | - Juan J Garcia-Vallejo
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, the Netherlands
| | - Daisy I Picavet
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam the Netherlands
| | - Robert van de Weerd
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands
| | | | - Coenraad P Kuijl
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands
| | - Nicole N van der Wel
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam the Netherlands
| | - Wilbert Bitter
- Department of Medical Microbiology and Infection Prevention, VU University Medical Center, Amsterdam, the Netherlands.,Department of Molecular Microbiology, VU University, Amsterdam, the Netherlands
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27
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Yu M, Nagalingam G, Ellis S, Martinez E, Sintchenko V, Spain M, Rutledge PJ, Todd MH, Triccas JA. Nontoxic Metal-Cyclam Complexes, a New Class of Compounds with Potency against Drug-Resistant Mycobacterium tuberculosis. J Med Chem 2016; 59:5917-21. [PMID: 27214150 DOI: 10.1021/acs.jmedchem.6b00432] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Tuberculosis (TB) accounted for 1.5 million deaths in 2014, and new classes of anti-TB drugs are required. We report a class of functionalized 1,8-disubstituted cyclam derivatives that display low micromolar activity against pathogenic mycobacteria. These compounds inhibit intracellular growth of Mycobacterium tuberculosis, are nontoxic to human cell lines, and are active against multidrug-resistant M. tuberculosis strains, indicating a distinct mode of action. These compounds warrant further appraisal as novel agents to control TB in humans.
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Affiliation(s)
- Mingfeng Yu
- School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia
| | - Gayathri Nagalingam
- Microbial Immunity and Pathogenesis Group, Department of Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Sydney, NSW 2006, Australia
| | - Samantha Ellis
- Microbial Immunity and Pathogenesis Group, Department of Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Sydney, NSW 2006, Australia
| | - Elena Martinez
- Centre for Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research-Pathology West, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Vitali Sintchenko
- Centre for Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research-Pathology West, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Malcolm Spain
- School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia
| | - Peter J Rutledge
- School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia
| | - Matthew H Todd
- School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia
| | - James A Triccas
- Microbial Immunity and Pathogenesis Group, Department of Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Sydney, NSW 2006, Australia
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28
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Prendergast KA, Counoupas C, Leotta L, Eto C, Bitter W, Winter N, Triccas JA. The Ag85B protein of the BCG vaccine facilitates macrophage uptake but is dispensable for protection against aerosol Mycobacterium tuberculosis infection. Vaccine 2016; 34:2608-15. [PMID: 27060378 DOI: 10.1016/j.vaccine.2016.03.089] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 02/09/2016] [Accepted: 03/28/2016] [Indexed: 10/22/2022]
Abstract
Defining the function and protective capacity of mycobacterial antigens is crucial for progression of tuberculosis (TB) vaccine candidates to clinical trials. The Ag85B protein is expressed by all pathogenic mycobacteria and is a component of multiple TB vaccines under evaluation in humans. In this report we examined the role of the BCG Ag85B protein in host cell interaction and vaccine-induced protection against virulent Mycobacterium tuberculosis infection. Ag85B was required for macrophage infection in vitro, as BCG deficient in Ag85B expression (BCG:(Δ85B)) was less able to infect RAW 264.7 macrophages compared to parental BCG, while an Ag85B-overexpressing BCG strain (BCG:(oex85B)) demonstrated improved uptake. A similar pattern was observed in vivo after intradermal delivery to mice, with significantly less BCG:(Δ85B) present in CD64(hi)CD11b(hi) macrophages compared to BCG or BCG:(oex85B). After vaccination of mice with BCG:(Δ85B) or parental BCG and subsequent aerosol M. tuberculosis challenge, similar numbers of activated CD4(+) and CD8(+) T cells were detected in the lungs of infected mice for both groups, suggesting the reduced macrophage uptake observed by BCG:(Δ85B) did not alter host immunity. Further, vaccination with both BCG:(Δ85B) and parental BCG resulted in a comparable reduction in pulmonary M. tuberculosis load. These data reveal an unappreciated role for Ag85B in the interaction of mycobacteria with host cells and indicates that single protective antigens are dispensable for protective immunity induced by BCG.
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Affiliation(s)
- Kelly A Prendergast
- Microbial Pathogenesis and Immunity Group, Discipline of Infectious Diseases and Immunology, University of Sydney, Sydney, NSW, Australia; Mycobacterial Research Group, Centenary Institute of Cancer Medicine and Cell Biology, Sydney, NSW, Australia
| | - Claudio Counoupas
- Microbial Pathogenesis and Immunity Group, Discipline of Infectious Diseases and Immunology, University of Sydney, Sydney, NSW, Australia; Mycobacterial Research Group, Centenary Institute of Cancer Medicine and Cell Biology, Sydney, NSW, Australia
| | - Lisa Leotta
- Microbial Pathogenesis and Immunity Group, Discipline of Infectious Diseases and Immunology, University of Sydney, Sydney, NSW, Australia; Mycobacterial Research Group, Centenary Institute of Cancer Medicine and Cell Biology, Sydney, NSW, Australia
| | - Carolina Eto
- Microbial Pathogenesis and Immunity Group, Discipline of Infectious Diseases and Immunology, University of Sydney, Sydney, NSW, Australia
| | - Wilbert Bitter
- Department of Medical Microbiology and Infection Control, VU University Medical Center, Amsterdam, The Netherlands
| | - Nathalie Winter
- INRA, Université de Tours, UMR 1282, Infectiologie et Santé Publique, 37380 Nouzilly, France
| | - James A Triccas
- Microbial Pathogenesis and Immunity Group, Discipline of Infectious Diseases and Immunology, University of Sydney, Sydney, NSW, Australia; Mycobacterial Research Group, Centenary Institute of Cancer Medicine and Cell Biology, Sydney, NSW, Australia.
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29
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Xu J, Zhu L, He S, Wu Y, Jin W, Yu T, Qu JY, Wen Z. Temporal-Spatial Resolution Fate Mapping Reveals Distinct Origins for Embryonic and Adult Microglia in Zebrafish. Dev Cell 2016; 34:632-41. [PMID: 26418294 DOI: 10.1016/j.devcel.2015.08.018] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/05/2015] [Accepted: 08/26/2015] [Indexed: 12/24/2022]
Abstract
Microglia are CNS resident macrophages, and they play important roles in neural development and function. Recent studies have suggested that murine microglia arise from a single source, the yolk sac (YS), yet these studies lack spatial resolution to define the bona fide source(s) for microglia. Here, using light-induced high temporal-spatial resolution fate mapping, we challenge this single-source view by showing that microglia in zebrafish arise from multiple sources. The embryonic/larval microglia originate from the rostral blood island (RBI) region, the equivalent of mouse YS for myelopoiesis, whereas the adult microglia arise from the ventral wall of dorsal aorta (VDA) region, a tissue also producing definitive hematopoiesis in mouse. We further show that the VDA-region-derived microglia are Runx1 dependent, but cMyb independent, and developmentally regulated differently from the RBI region-derived microglia. Our study establishes a new paradigm for investigating the development and function of distinct microglia populations.
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Affiliation(s)
- Jin Xu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Lu Zhu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Sicong He
- Department of Electronic and Computer Engineering, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Yi Wu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Wan Jin
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Tao Yu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC
| | - Jianan Y Qu
- Department of Electronic and Computer Engineering, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC.
| | - Zilong Wen
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PRC.
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Direct In Vivo Manipulation and Imaging of Calcium Transients in Neutrophils Identify a Critical Role for Leading-Edge Calcium Flux. Cell Rep 2015; 13:2107-17. [PMID: 26673320 DOI: 10.1016/j.celrep.2015.11.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 09/21/2015] [Accepted: 10/30/2015] [Indexed: 10/22/2022] Open
Abstract
Calcium signaling has long been associated with key events of immunity, including chemotaxis, phagocytosis, and activation. However, imaging and manipulation of calcium flux in motile immune cells in live animals remain challenging. Using light-sheet microscopy for in vivo calcium imaging in zebrafish, we observe characteristic patterns of calcium flux triggered by distinct events, including phagocytosis of pathogenic bacteria and migration of neutrophils toward inflammatory stimuli. In contrast to findings from ex vivo studies, we observe enriched calcium influx at the leading edge of migrating neutrophils. To directly manipulate calcium dynamics in vivo, we have developed transgenic lines with cell-specific expression of the mammalian TRPV1 channel, enabling ligand-gated, reversible, and spatiotemporal control of calcium influx. We find that controlled calcium influx can function to help define the neutrophil's leading edge. Cell-specific TRPV1 expression may have broad utility for precise control of calcium dynamics in other immune cell types and organisms.
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31
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Hodgkinson JW, Ge JQ, Katzenback BA, Havixbeck JJ, Barreda DR, Stafford JL, Belosevic M. Development of an in vitro model system to study the interactions between Mycobacterium marinum and teleost neutrophils. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2015; 53:349-357. [PMID: 26231477 DOI: 10.1016/j.dci.2015.07.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 06/04/2023]
Abstract
The lack of a reliable mammalian neutrophil in vitro culture system has restricted our ability to examine their precise roles in mycobacterial infections. Previously, we developed the procedures for the isolation and culture of primary kidney-derived neutrophil-like cells from goldfish that are functionally and morphologically similar to mammalian neutrophils. The cultured primary goldfish neutrophils exhibited prolonged viability and functional effector responses. In this study, we demonstrate that when exposed to live or heat-killed Mycobacterium marinum, goldfish neutrophils increased their mRNA levels for several pro-inflammatory cytokines (il-1β1, il-1β2, tnfα-1, tnfα-2) and the cytokine receptors (ifngr1-1, tnfr1, tnfr2). These neutrophils also exhibited chemotaxis toward live mycobacteria, internalized the bacilli, and produced reactive oxygen intermediates (ROI) in response to pathogen exposure. The survival of intracellular mycobacteria was significantly reduced in activated neutrophils, indicating a robust killing response by these teleost granulocytes. We suggest that this goldfish primary neutrophil in vitro model system will provide important information regarding neutrophil-mediated host defense mechanisms against mycobacteria in teleosts as well as in higher vertebrates.
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Affiliation(s)
- Jordan W Hodgkinson
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Jun-Qing Ge
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Barbara A Katzenback
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Jeffrey J Havixbeck
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Daniel R Barreda
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada; Department of Agricultural Food and Nutritional Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - James L Stafford
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada; Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta, Canada.
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32
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Galindo-Villegas J. Recent findings on vertebrate developmental immunity using the zebrafish model. Mol Immunol 2015; 69:106-12. [PMID: 26589453 DOI: 10.1016/j.molimm.2015.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/17/2015] [Accepted: 10/19/2015] [Indexed: 01/06/2023]
Abstract
To grant survival against sterile or microbe induced inflammation, all animals rely on correct immune system functioning. The development of immunity occurs in vertebrates during embryogenesis in a process called hematopoiesis, which is characterized by the formation of blood cellular components such as embryonic erythrocytes and primitive macrophages. These cells are formed in a sterile environment from a rare subset of pluripotent hematopoietic stem cells (HSC) during a brief period of the primitive hematopoietic wave. Diverse signals, like Notch, are indispensable in HSC emergence and differentiation. However, to successfully replicate the process in vitro using pluripotent precursors, the full set of required signals is still a matter of debate. Among the latest findings, proinflammatory signals produced by transient primitive myelocites in zebrafish have been seen to act as essential mediators in establishing the HSC program of the adult vertebrate hematopoietic system. In this regard, the zebrafish immune model has emerged as a feasible live vertebrate model for examining developmental immunity and related host-microbe interactions, both at the molecular and cellular level. Thus, using the zebrafish embryo, this review summarizes recent findings, on the signals required for immune development and further maturation of the system, in a context where no adaptive immune response has yet been developed.
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Affiliation(s)
- Jorge Galindo-Villegas
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, IMIB-Arrixaca, Campus Universitario de Espinardo, Murcia 30100, Spain.
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33
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Shi X, He BL, Ma ACH, Leung AYH. Fishing the targets of myeloid malignancies in the era of next generation sequencing. Blood Rev 2015; 30:119-30. [PMID: 26443083 DOI: 10.1016/j.blre.2015.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 08/15/2015] [Accepted: 09/04/2015] [Indexed: 11/29/2022]
Abstract
Recent advent in next generation sequencing (NGS) and bioinformatics has generated an unprecedented amount of genetic information in myeloidmalignancies. This information may shed lights to the pathogenesis, diagnosis and prognostication of these diseases and provide potential targets for therapeutic intervention. However, the rapid emergence of genetic information will quickly outpace their functional validation by conventional laboratory platforms. Foundational knowledge about zebrafish hematopoiesis accumulated over the past two decades and novel genomeediting technologies and research strategies in thismodel organismhavemade it a unique and timely research tool for the study of human blood diseases. Recent studies modeling human myeloid malignancies in zebrafish have also highlighted the technical feasibility and clinical relevance of thesemodels. Careful validation of experimental protocols and standardization among laboratorieswill further enhance the application of zebrafish in the scientific communities and provide important insights to the personalized treatment ofmyeloid malignancies.
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Affiliation(s)
- Xiangguo Shi
- Division of Haematology, Medical Oncology and Bone Marrow Transplantation, Department of Medicine, LKS Faculty Medicine, The University of Hong Kong.
| | - Bai-Liang He
- Division of Haematology, Medical Oncology and Bone Marrow Transplantation, Department of Medicine, LKS Faculty Medicine, The University of Hong Kong.
| | - Alvin C H Ma
- Division of Haematology, Medical Oncology and Bone Marrow Transplantation, Department of Medicine, LKS Faculty Medicine, The University of Hong Kong.
| | - Anskar Y H Leung
- Division of Haematology, Medical Oncology and Bone Marrow Transplantation, Department of Medicine, LKS Faculty Medicine, The University of Hong Kong.
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Harvie EA, Huttenlocher A. Neutrophils in host defense: new insights from zebrafish. J Leukoc Biol 2015; 98:523-37. [PMID: 25717145 PMCID: PMC4569048 DOI: 10.1189/jlb.4mr1114-524r] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 01/15/2015] [Accepted: 01/19/2015] [Indexed: 12/11/2022] Open
Abstract
Neutrophils are highly motile phagocytic cells that play a critical role in the immune response to infection. Zebrafish (Danio rerio) are increasingly used to study neutrophil function and host-pathogen interactions. The generation of transgenic zebrafish lines with fluorescently labeled leukocytes has made it possible to visualize the neutrophil response to infection in real time by use of optically transparent zebrafish larvae. In addition, the genetic tractability of zebrafish has allowed for the generation of models of inherited neutrophil disorders. In this review, we discuss several zebrafish models of infectious disease, both in the context of immunocompetent, as well as neutrophil-deficient hosts and how these models have shed light on neutrophil behavior during infection.
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Affiliation(s)
- Elizabeth A Harvie
- *Microbiology Doctoral Training Program, Departments of Medical Microbiology and Immunology and Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Anna Huttenlocher
- *Microbiology Doctoral Training Program, Departments of Medical Microbiology and Immunology and Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, USA
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35
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Okuda KS, Misa JP, Oehlers SH, Hall CJ, Ellett F, Alasmari S, Lieschke GJ, Crosier KE, Crosier PS, Astin JW. A zebrafish model of inflammatory lymphangiogenesis. Biol Open 2015; 4:1270-80. [PMID: 26369931 PMCID: PMC4610225 DOI: 10.1242/bio.013540] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a disabling chronic inflammatory disease of the gastrointestinal tract. IBD patients have increased intestinal lymphatic vessel density and recent studies have shown that this may contribute to the resolution of IBD. However, the molecular mechanisms involved in IBD-associated lymphangiogenesis are still unclear. In this study, we established a novel inflammatory lymphangiogenesis model in zebrafish larvae involving colitogenic challenge stimulated by exposure to 2,4,6-trinitrobenzenesulfonic acid (TNBS) or dextran sodium sulphate (DSS). Treatment with either TNBS or DSS resulted in vascular endothelial growth factor receptor (Vegfr)-dependent lymphangiogenesis in the zebrafish intestine. Reduction of intestinal inflammation by the administration of the IBD therapeutic, 5-aminosalicylic acid, reduced intestinal lymphatic expansion. Zebrafish macrophages express vascular growth factors vegfaa, vegfc and vegfd and chemical ablation of these cells inhibits intestinal lymphatic expansion, suggesting that the recruitment of macrophages to the intestine upon colitogenic challenge is required for intestinal inflammatory lymphangiogenesis. Importantly, this study highlights the potential of zebrafish as an inflammatory lymphangiogenesis model that can be used to investigate the role and mechanism of lymphangiogenesis in inflammatory diseases such as IBD.
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Affiliation(s)
- Kazuhide S Okuda
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - June Pauline Misa
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Stefan H Oehlers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham 27710, USA
| | - Christopher J Hall
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Felix Ellett
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Sultan Alasmari
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Graham J Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Kathryn E Crosier
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Philip S Crosier
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Jonathan W Astin
- Department of Molecular Medicine & Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
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36
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Host contributions to construction of three device-associated Candida albicans biofilms. Infect Immun 2015; 83:4630-8. [PMID: 26371129 DOI: 10.1128/iai.00931-15] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/09/2015] [Indexed: 01/05/2023] Open
Abstract
Among the most fascinating virulence attributes of Candida is the ability to transition to a biofilm lifestyle. As a biofilm, Candida cells adhere to a surface, such as a vascular catheter, and become encased in an extracellular matrix. During this mode of growth, Candida resists the normal immune response, often causing devastating disease. Based on scanning electron microscopy images, we hypothesized that host cells and proteins become incorporated into clinical biofilms. As a means to gain an understanding of these host-biofilm interactions, we explored biofilm-associated host components by using microscopy and liquid chromatography-mass spectrometry. Here we characterize the host proteins associated with several in vivo rat Candida albicans biofilms, including those from vascular catheter, denture, and urinary catheter models as well as uninfected devices. A conserved group of 14 host proteins were found to be more abundant during infection at each of the niches. The host proteins were leukocyte and erythrocyte associated and included proteins involved in inflammation, such as C-reactive protein, myeloperoxidase, and alarmin S100-A9. A group of 59 proteins were associated with both infected and uninfected devices, and these included matricellular and inflammatory proteins. In addition, site-specific proteins were identified, such as amylase in association with the denture device. Cellular analysis revealed neutrophils as the predominant leukocytes associating with biofilms. These experiments demonstrate that host cells and proteins are key components of in vivo Candida biofilms, likely with one subset associating with the device and another being recruited by the proliferating biofilm.
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37
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Functions of idh1 and its mutation in the regulation of developmental hematopoiesis in zebrafish. Blood 2015; 125:2974-84. [DOI: 10.1182/blood-2014-09-601187] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 03/05/2015] [Indexed: 12/26/2022] Open
Abstract
Key Points
Zebrafish idh1 plays an important role in the regulation of myelopoiesis and definitive hematopoiesis. Expression of human IDH1-R132H and its zebrafish orthologue induced an increase in myelopoiesis and 2-hydroxyglutrate.
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38
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Liu X, Jia X, Yuan H, Ma K, Chen Y, Jin Y, Deng M, Pan W, Chen S, Chen Z, de The H, Zon LI, Zhou Y, Zhou J, Zhu J. DNA methyltransferase 1 functions through C/ebpa to maintain hematopoietic stem and progenitor cells in zebrafish. J Hematol Oncol 2015; 8:15. [PMID: 25886310 PMCID: PMC4372312 DOI: 10.1186/s13045-015-0115-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/24/2015] [Indexed: 12/13/2022] Open
Abstract
Background DNA methyltransferase 1 (Dnmt1) regulates expression of many critical genes through maintaining parental DNA methylation patterns on daughter DNA strands during mitosis. It is essential for embryonic development and diverse biological processes, including maintenance of hematopoietic stem and progenitor cells (HSPCs). However, the precise molecular mechanism of how Dnmt1 is involved in HSPC maintenance remains unexplored. Methods An N-ethyl-N-nitrosourea (ENU)-based genetic screening was performed to identify putative mutants with defects in definitive HSPCs during hematopoiesis in zebrafish. The expression of hematopoietic markers was analyzed via whole mount in situ hybridization assay (WISH). Positional cloning approach was carried out to identify the gene responsible for the defective definitive hematopoiesis in the mutants. Analyses of the mechanism were conducted by morpholino-mediated gene knockdown, mRNA injection rescue assays, anti-phosphorylated histone H3 (pH3) immunostaining and TUNEL assay, quantitative real-time PCR, and bisulfite sequencing analysis. Results A heritable mutant line with impaired HSPCs of definitive hematopoiesis was identified. Positional cloning demonstrated that a stop codon mutation was introduced in dnmt1 which resulted in a predicted truncated Dnmt1 lacking the DNA methylation catalytic domain. Molecular analysis revealed that expression of CCAAT/enhancer-binding protein alpha (C/ebpa) was upregulated, which correlated with hypomethylation of CpG islands in the regulation regions of cebpa gene in Dnmt1 deficient HSPCs. Overexpression of a transcriptional repressive SUMO-C/ebpa fusion protein could rescue hematological defects in the dnmt1 mutants. Finally, dnmt1 and cebpa double null embryos exhibited no obvious abnormal hematopoiesis indicated that the HSPC defects triggered by dnmt1 mutation were C/ebpa dependent. Conclusions Dnmt1 is required for HSPC maintenance via cebpa regulation during definitive hematopoiesis in zebrafish. Electronic supplementary material The online version of this article (doi:10.1186/s13045-015-0115-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaohui Liu
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Xiaoe Jia
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, 200031, China.
| | - Hao Yuan
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Ke Ma
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, 200031, China.
| | - Yi Chen
- Laboratory of Development and Diseases, State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Yi Jin
- Laboratory of Development and Diseases, State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Min Deng
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, 200031, China.
| | - Weijun Pan
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, 200031, China.
| | - Saijuan Chen
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Zhu Chen
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Hugues de The
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. .,Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Université de Paris 7/INSERM/CNRS UMR 944/7212, 75475, Paris, France.
| | - Leonard I Zon
- Stem Cell Program, Hematology/Oncology Program at Children's Hospital Boston, Harvard Medical School, Boston, MA, 02114, USA.
| | - Yi Zhou
- Stem Cell Program, Hematology/Oncology Program at Children's Hospital Boston, Harvard Medical School, Boston, MA, 02114, USA.
| | - Jun Zhou
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Jun Zhu
- CNRS-LIA124, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. .,Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Université de Paris 7/INSERM/CNRS UMR 944/7212, 75475, Paris, France.
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Torraca V, Masud S, Spaink HP, Meijer AH. Macrophage-pathogen interactions in infectious diseases: new therapeutic insights from the zebrafish host model. Dis Model Mech 2015; 7:785-97. [PMID: 24973749 PMCID: PMC4073269 DOI: 10.1242/dmm.015594] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Studying macrophage biology in the context of a whole living organism provides unique possibilities to understand the contribution of this extremely dynamic cell subset in the reaction to infections, and has revealed the relevance of cellular and molecular processes that are fundamental to the cell-mediated innate immune response. In particular, various recently established zebrafish infectious disease models are contributing substantially to our understanding of the mechanisms by which different pathogens interact with macrophages and evade host innate immunity. Transgenic zebrafish lines with fluorescently labeled macrophages and other leukocyte populations enable non-invasive imaging at the optically transparent early life stages. Furthermore, there is a continuously expanding availability of vital reporters for subcellular compartments and for probing activation of immune defense mechanisms. These are powerful tools to visualize the activity of phagocytic cells in real time and shed light on the intriguing paradoxical roles of these cells in both limiting infection and supporting the dissemination of intracellular pathogens. This Review will discuss how several bacterial and fungal infection models in zebrafish embryos have led to new insights into the dynamic molecular and cellular mechanisms at play when pathogens encounter host macrophages. We also describe how these insights are inspiring novel therapeutic strategies for infectious disease treatment.
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Affiliation(s)
- Vincenzo Torraca
- Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Samrah Masud
- Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Herman P Spaink
- Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Annemarie H Meijer
- Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands.
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40
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Abstract
Despite efforts to generate new vaccines and antibiotics for tuberculosis, the disease remains a public health problem worldwide. The zebrafish Danio rerio has emerged as a useful model to investigate mycobacterial pathogenesis and treatment. Infection of zebrafish with Mycobacterium marinum, the closest relative of the Mycobacterium tuberculosis complex, recapitulates many aspects of human tuberculosis. The zebrafish model affords optical transparency, abundant genetic tools and in vivo imaging of the progression of infection. Here, we review how the zebrafish–M. marinum system has been deployed to make novel observations about the role of innate immunity, the tuberculous granuloma, and crucial host and bacterial genes. Finally, we assess how these findings relate to human disease and provide a framework for novel strategies to treat tuberculosis.
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Affiliation(s)
- Mark R Cronan
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710, USA
| | - David M Tobin
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710, USA. Center for Microbial Pathogenesis, Duke University Medical Center, Durham, NC 27710, USA.
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41
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Myc-induced liver tumors in transgenic zebrafish can regress in tp53 null mutation. PLoS One 2015; 10:e0117249. [PMID: 25612309 PMCID: PMC4303426 DOI: 10.1371/journal.pone.0117249] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 12/20/2014] [Indexed: 02/07/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is currently one of the top lethal cancers with an increasing trend. Deregulation of MYC in HCC is frequently detected and always correlated with poor prognosis. As the zebrafish genome contains two differentially expressed zebrafish myc orthologs, myca and mycb, it remains unclear about the oncogenicity of the two zebrafish myc genes. In the present study, we developed two transgenic zebrafish lines to over-express myca and mycb respectively in the liver using a mifepristone-inducible system and found that both myc genes were oncogenic. Moreover, the transgenic expression of myca in hepatocytes caused robust liver tumors with several distinct phenotypes of variable severity. ~5% of myca transgenic fish developing multinodular HCC with cirrhosis after 8 months of induced myca expression. Apoptosis was also observed with myca expression; introduction of homozygous tp53-/- mutation into the myca transgenic fish reduced apoptosis and accelerated tumor progression. The malignant status of hepatocytes was dependent on continued expression of myca; withdrawal of the mifepristone inducer resulted in a rapid regression of liver tumors, and the tumor regression occurred even in the tp53-/- mutation background. Thus, our data demonstrated the robust oncogenicity of zebrafish myca and the requirement of sustained Myc overexpression for maintenance of the liver tumor phenotype in this transgenic model. Furthermore, tumor regression is independent of the function of Tp53.
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42
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Keightley MC, Wang CH, Pazhakh V, Lieschke GJ. Delineating the roles of neutrophils and macrophages in zebrafish regeneration models. Int J Biochem Cell Biol 2014; 56:92-106. [DOI: 10.1016/j.biocel.2014.07.010] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/18/2014] [Accepted: 07/14/2014] [Indexed: 12/24/2022]
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43
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Benard EL, Racz PI, Rougeot J, Nezhinsky AE, Verbeek FJ, Spaink HP, Meijer AH. Macrophage-expressed perforins mpeg1 and mpeg1.2 have an anti-bacterial function in zebrafish. J Innate Immun 2014; 7:136-52. [PMID: 25247677 DOI: 10.1159/000366103] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 07/24/2014] [Indexed: 11/19/2022] Open
Abstract
Macrophage-expressed gene 1 (MPEG1) encodes an evolutionarily conserved protein with a predicted membrane attack complex/perforin domain associated with host defence against invading pathogens. In vertebrates, MPEG1/perforin-2 is an integral membrane protein of macrophages, suspected to be involved in the killing of intracellular bacteria by pore-forming activity. Zebrafish have 3 copies of MPEG1; 2 are expressed in macrophages, whereas the third could be a pseudogene. The mpeg1 and mpeg1.2 genes show differential regulation during infection of zebrafish embryos with the bacterial pathogens Mycobacterium marinum and Salmonella typhimurium. While mpeg1 is downregulated during infection with both pathogens, mpeg1.2 is infection inducible. Upregulation of mpeg1.2 is partially dependent on the presence of functional Mpeg1 and requires the Toll-like receptor adaptor molecule MyD88 and the transcription factor NFκB. Knockdown of mpeg1 alters the immune response to M. marinum infection and results in an increased bacterial burden. In Salmonella typhimurium infection, both mpeg1 and mpeg1.2 knockdown increase the bacterial burdens, but mpeg1 morphants show increased survival times. The combined results of these two in vivo infection models support the anti-bacterial function of the MPEG1/perforin-2 family and indicate that the intricate cross-regulation of the two mpeg1 copies aids the zebrafish host in combatting infection of various pathogens.
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Affiliation(s)
- Erica L Benard
- Institute of Biology, Leiden University, Leiden, The Netherlands
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44
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Li J, Li K, Dong X, Liang D, Zhao Q. Ncor1 and Ncor2 play essential but distinct roles in zebrafish primitive myelopoiesis. Dev Dyn 2014; 243:1544-53. [PMID: 25156564 DOI: 10.1002/dvdy.24181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 07/31/2014] [Accepted: 08/18/2014] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Although Ncor1 and Ncor2, the co-repressors that can actively repress gene transcription through binding nuclear receptors in the absence of ligands, are crucial to vertebrate embryogenesis, their roles in its primitive myelopoiesis remain unknown. We investigated the function of ncor1 or ncor2 in zebrafish embryos by antisense morpholino knocking down technologies. RESULTS Development of both mfap4(+) macrophages and mpx(+) neutrophils was abolished in ncor2 morphants, whereas development of mpx(+) neutrophils was depleted in ncor1 morphants. ncor2 was essential to the development of spi1b(+) myeloid precursors but not anterior hemangioblasts whereas ncor1 was dispensable to the specification of spi1b(+) myeloid precursors and anterior hemangioblasts. Overexpressing spi1b could partially rescue expressions of mfap4 and mpx in ncor2 morphants. Furthermore, overexpressing tal1/lmo2 could well rescue the defective myelopoiesis in both ncor1 and ncor2 morphants. CONCLUSIONS Ncor1 and Ncor2 play essential but distinct roles in zebrafish primitive myelopoiesis. ncor2 could parallel with tal1/lmo2 and acted upstream of spi1b to produce mature macrophages and neutrophils during primitive myelopoiesis. The role of ncor1 in zebrafish myelopoiesis could be substituted by excessive Tal1/Lmo2.
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Affiliation(s)
- Jingyun Li
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Nanjing, China; Maternal and Child Health Medical Institute, Nanjing Maternal and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, China
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Glenn NO, Schumacher JA, Kim HJ, Zhao EJ, Skerniskyte J, Sumanas S. Distinct regulation of the anterior and posterior myeloperoxidase expression by Etv2 and Gata1 during primitive Granulopoiesis in zebrafish. Dev Biol 2014; 393:149-159. [PMID: 24956419 DOI: 10.1016/j.ydbio.2014.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 06/11/2014] [Accepted: 06/13/2014] [Indexed: 12/26/2022]
Abstract
Neutrophilic granulocytes are the most abundant type of myeloid cells and form an essential part of the innate immune system. In vertebrates the first neutrophils are thought to originate during primitive hematopoiesis, which precedes hematopoietic stem cell formation. In zebrafish embryos, it has been suggested that primitive neutrophils may originate in two distinct sites, the anterior (ALPM) and posterior lateral plate mesoderm (PLPM). An ETS-family transcription factor Etsrp/Etv2/ER71 has been implicated in vasculogenesis and hematopoiesis in multiple vertebrates. However, its role during neutrophil development is not well understood. Here we demonstrate using zebrafish embryos that Etv2 has a specific cell-autonomous function during primitive neutropoiesis in the anterior lateral plate mesoderm (ALPM) but has little effect on erythropoiesis or the posterior lateral plate mesoderm (PLPM) expression of neutrophil marker myeloperoxidase mpo/mpx. Our results argue that ALPM-derived neutrophils originate from etv2-expressing cells which downregulate etv2 during neutropoiesis. We further show that Scl functions downstream of Etv2 in anterior neutropoiesis. Additionally, we demonstrate that mpx expression within the PLPM overlaps with gata1 expression, potentially marking the cells with a dual myelo-erythroid potential. Intriguingly, initiation of mpx expression in the PLPM is dependent on gata1 but not etv2 function. Our results demonstrate that mpx expression is controlled differently in the ALPM and PLPM regions and describe novel roles for etv2 and gata1 during primitive neutropoiesis.
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Affiliation(s)
- Nicole O Glenn
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
| | - Jennifer A Schumacher
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
| | - Hyon J Kim
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
| | - Emma J Zhao
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
| | - Jurate Skerniskyte
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
| | - Saulius Sumanas
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH 45229, USA
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He BL, Shi X, Man CH, Ma ACH, Ekker SC, Chow HCH, So CWE, Choi WWL, Zhang W, Zhang Y, Leung AYH. Functions of flt3 in zebrafish hematopoiesis and its relevance to human acute myeloid leukemia. Blood 2014; 123:2518-29. [PMID: 24591202 PMCID: PMC4017313 DOI: 10.1182/blood-2013-02-486688] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 02/18/2014] [Indexed: 12/22/2022] Open
Abstract
FMS-like tyrosine kinase 3 (FLT3) is expressed in human hematopoietic stem and progenitor cells (HSPCs) but its role during embryogenesis is unclear. In acute myeloid leukemia (AML), internal tandem duplication (ITD) of FLT3 at the juxtamembrane (JMD) and tyrosine kinase (TKD) domains (FLT3-ITD(+)) occurs in 30% of patients and is associated with inferior clinical prognosis. TKD mutations (FLT3-TKD(+)) occur in 5% of cases. We made use of zebrafish to examine the role of flt3 in developmental hematopoiesis and model human FLT3-ITD(+) and FLT3-TKD(+) AML. Zebrafish flt3 JMD and TKD were remarkably similar to their mammalian orthologs. Morpholino knockdown significantly reduced the expression of l-plastin (pan-leukocyte), csf1r, and mpeg1 (macrophage) as well as that of c-myb (definitive HSPCs), lck, and rag1 (T-lymphocyte). Expressing human FLT3-ITD in zebrafish embryos resulted in expansion and clustering of myeloid cells (pu.1(+), mpo(+), and cebpα(+)) which were ameliorated by AC220 and associated with stat5, erk1/2, and akt phosphorylation. Human FLT3-TKD (D835Y) induced significant, albeit modest, myeloid expansion resistant to AC220. This study provides novel insight into the role of flt3 during hematopoiesis and establishes a zebrafish model of FLT3-ITD(+) and FLT3-TKD(+) AML that may facilitate high-throughput screening of novel and personalized agents.
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Affiliation(s)
- Bai-Liang He
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
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Grayfer L, Hodgkinson JW, Belosevic M. Antimicrobial responses of teleost phagocytes and innate immune evasion strategies of intracellular bacteria. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 43:223-42. [PMID: 23954721 DOI: 10.1016/j.dci.2013.08.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 08/02/2013] [Accepted: 08/03/2013] [Indexed: 05/22/2023]
Abstract
During infection, macrophage lineage cells eliminate infiltrating pathogens through a battery of antimicrobial responses, where the efficacy of these innate immune responses is pivotal to immunological outcomes. Not surprisingly, many intracellular pathogens have evolved mechanisms to overcome macrophage defenses, using these immune cells as residences and dissemination strategies. With pathogenic infections causing increasing detriments to both aquacultural and wild fish populations, it is imperative to garner greater understanding of fish phagocyte antimicrobial responses and the mechanisms by which aquatic pathogens are able to overcome these teleost macrophage barriers. Insights into the regulation of macrophage immunity of bony fish species will lend to the development of more effective aquacultural prophylaxis as well as broadening our understanding of the evolution of these immune processes. Accordingly, this review focuses on recent advances in the understanding of teleost macrophage antimicrobial responses and the strategies by which intracellular fish pathogens are able to avoid being killed by phagocytes, with a focus on Mycobacterium marinum.
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Affiliation(s)
- Leon Grayfer
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, USA
| | | | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Edmonton, Canada; School of Public Health, University of Alberta, Edmonton, Canada.
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Kotkamp K, Kur E, Wendik B, Polok BK, Ben-Dor S, Onichtchouk D, Driever W. Pou5f1/Oct4 promotes cell survival via direct activation of mych expression during zebrafish gastrulation. PLoS One 2014; 9:e92356. [PMID: 24643012 PMCID: PMC3958507 DOI: 10.1371/journal.pone.0092356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 02/17/2014] [Indexed: 01/29/2023] Open
Abstract
Myc proteins control cell proliferation, cell cycle progression, and apoptosis, and play important roles in cancer as well in establishment of pluripotency. Here we investigated the control of myc gene expression by the Pou5f1/Oct4 pluripotency factor in the early zebrafish embryo. We analyzed the expression of all known zebrafish Myc family members, myca, mycb, mych, mycl1a, mycl1b, and mycn, by whole mount in situ hybridization during blastula and gastrula stages in wildtype and maternal plus zygotic pou5f1 mutant (MZspg) embryos, as well as by quantitative PCR and in time series microarray data. We found that the broad blastula and gastrula stage mych expression, as well as late gastrula stage mycl1b expression, both depend on Pou5f1 activity. We analyzed ChIP-Seq data and found that both Pou5f1 and Sox2 bind to mych and mycl1b control regions. The regulation of mych by Pou5f1 appears to be direct transcriptional activation, as overexpression of a Pou5f1 activator fusion protein in MZspg embryos induced strong mych expression even when translation of zygotically expressed mRNAs was suppressed. We further showed that MZspg embryos develop enhanced apoptosis already during early gastrula stages, when apoptosis was not be detected in wildtype embryos. However, Mych knockdown alone did not induce early apoptosis, suggesting potentially redundant action of several early expressed myc genes, or combination of several pathways affected in MZspg. Experimental mych overexpression in MZspg embryos did significantly, but not completely suppress the apoptosis phenotype. Similarly, p53 knockdown only partially suppressed apoptosis in MZspg gastrula embryos. However, combined knockdown of p53 and overexpression of Mych completely rescued the MZspg apoptosis phenotype. These results reveal that Mych has anti-apoptotic activity in the early zebrafish embryo, and that p53-dependent and Myc pathways are likely to act in parallel to control apoptosis at these stages.
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Affiliation(s)
- Kay Kotkamp
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Esther Kur
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Björn Wendik
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Bożena K. Polok
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Shifra Ben-Dor
- Biological Services, Weizmann Institute of Science, Rehovot, Israel
| | - Daria Onichtchouk
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
- BIOSS - Centre for Biological Signalling Studies, Freiburg, Germany
| | - Wolfgang Driever
- Developmental Biology, Institute Biology I, Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
- BIOSS - Centre for Biological Signalling Studies, Freiburg, Germany
- * E-mail:
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Makarov V, Lechartier B, Zhang M, Neres J, van der Sar AM, Raadsen SA, Hartkoorn RC, Ryabova OB, Vocat A, Decosterd LA, Widmer N, Buclin T, Bitter W, Andries K, Pojer F, Dyson PJ, Cole ST. Towards a new combination therapy for tuberculosis with next generation benzothiazinones. EMBO Mol Med 2014; 6:372-83. [PMID: 24500695 PMCID: PMC3958311 DOI: 10.1002/emmm.201303575] [Citation(s) in RCA: 269] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The benzothiazinone lead compound, BTZ043, kills Mycobacterium tuberculosis by inhibiting the essential flavo-enzyme DprE1, decaprenylphosphoryl-beta-D-ribose 2-epimerase. Here, we synthesized a new series of piperazine-containing benzothiazinones (PBTZ) and show that, like BTZ043, the preclinical candidate PBTZ169 binds covalently to DprE1. The crystal structure of the DprE1-PBTZ169 complex reveals formation of a semimercaptal adduct with Cys387 in the active site and explains the irreversible inactivation of the enzyme. Compared to BTZ043, PBTZ169 has improved potency, safety and efficacy in zebrafish and mouse models of tuberculosis (TB). When combined with other TB drugs, PBTZ169 showed additive activity against M. tuberculosis in vitro except with bedaquiline (BDQ) where synergy was observed. A new regimen comprising PBTZ169, BDQ and pyrazinamide was found to be more efficacious than the standard three drug treatment in a murine model of chronic disease. PBTZ169 is thus an attractive drug candidate to treat TB in humans. Subject Categories Microbiology, Virology & Host Pathogen Interaction; Pharmacology & Drug Discovery
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Affiliation(s)
- Vadim Makarov
- More Medicines for Tuberculosis (MM4TB) Consortium www.mm4tb.org
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Mikut R, Dickmeis T, Driever W, Geurts P, Hamprecht FA, Kausler BX, Ledesma-Carbayo MJ, Marée R, Mikula K, Pantazis P, Ronneberger O, Santos A, Stotzka R, Strähle U, Peyriéras N. Automated processing of zebrafish imaging data: a survey. Zebrafish 2013; 10:401-21. [PMID: 23758125 PMCID: PMC3760023 DOI: 10.1089/zeb.2013.0886] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Due to the relative transparency of its embryos and larvae, the zebrafish is an ideal model organism for bioimaging approaches in vertebrates. Novel microscope technologies allow the imaging of developmental processes in unprecedented detail, and they enable the use of complex image-based read-outs for high-throughput/high-content screening. Such applications can easily generate Terabytes of image data, the handling and analysis of which becomes a major bottleneck in extracting the targeted information. Here, we describe the current state of the art in computational image analysis in the zebrafish system. We discuss the challenges encountered when handling high-content image data, especially with regard to data quality, annotation, and storage. We survey methods for preprocessing image data for further analysis, and describe selected examples of automated image analysis, including the tracking of cells during embryogenesis, heartbeat detection, identification of dead embryos, recognition of tissues and anatomical landmarks, and quantification of behavioral patterns of adult fish. We review recent examples for applications using such methods, such as the comprehensive analysis of cell lineages during early development, the generation of a three-dimensional brain atlas of zebrafish larvae, and high-throughput drug screens based on movement patterns. Finally, we identify future challenges for the zebrafish image analysis community, notably those concerning the compatibility of algorithms and data formats for the assembly of modular analysis pipelines.
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Affiliation(s)
- Ralf Mikut
- Karlsruhe Institute of Technology, Karlsruhe, Germany.
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