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Dias J, Cattin A, Bendoumou M, Dutilleul A, Lodge R, Goulet JP, Fert A, Raymond Marchand L, Wiche Salinas TR, Ngassaki Yoka CD, Gabriel EM, Caballero RE, Routy JP, Cohen ÉA, Van Lint C, Ancuta P. Retinoic acid enhances HIV-1 reverse transcription and transcription in macrophages via mTOR-modulated mechanisms. Cell Rep 2024; 43:114414. [PMID: 38943643 PMCID: PMC11341200 DOI: 10.1016/j.celrep.2024.114414] [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: 10/25/2023] [Revised: 05/14/2024] [Accepted: 06/12/2024] [Indexed: 07/01/2024] Open
Abstract
The intestinal environment facilitates HIV-1 infection via mechanisms involving the gut-homing vitamin A-derived retinoic acid (RA), which transcriptionally reprograms CD4+ T cells for increased HIV-1 replication/outgrowth. Consistently, colon-infiltrating CD4+ T cells carry replication-competent viral reservoirs in people with HIV-1 (PWH) receiving antiretroviral therapy (ART). Intriguingly, integrative infection in colon macrophages, a pool replenished by monocytes, represents a rare event in ART-treated PWH, thus questioning the effect of RA on macrophages. Here, we demonstrate that RA enhances R5 but not X4 HIV-1 replication in monocyte-derived macrophages (MDMs). RNA sequencing, gene set variation analysis, and HIV interactor NCBI database interrogation reveal RA-mediated transcriptional reprogramming associated with metabolic/inflammatory processes and HIV-1 resistance/dependency factors. Functional validations uncover post-entry mechanisms of RA action including SAMHD1-modulated reverse transcription and CDK9/RNA polymerase II (RNAPII)-dependent transcription under the control of mammalian target of rapamycin (mTOR). These results support a model in which macrophages residing in the intestine of ART-untreated PWH contribute to viral replication/dissemination in an mTOR-sensitive manner.
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Affiliation(s)
- Jonathan Dias
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Amélie Cattin
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Maryam Bendoumou
- Service of Molecular Virology, Department of Molecular Biology (DBM), Université libre de Bruxelles (ULB), 6041 Gosselies, Belgium
| | - Antoine Dutilleul
- Service of Molecular Virology, Department of Molecular Biology (DBM), Université libre de Bruxelles (ULB), 6041 Gosselies, Belgium
| | - Robert Lodge
- Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | | | - Augustine Fert
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Laurence Raymond Marchand
- Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Tomas Raul Wiche Salinas
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Christ-Dominique Ngassaki Yoka
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Etiene Moreira Gabriel
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada
| | - Ramon Edwin Caballero
- Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada; Department of Microbiology and Immunology, McGill University Health Centre, Montréal, QC, Canada
| | - Jean-Pierre Routy
- Infectious Diseases and Immunity in Global Health Program, Research Institute, McGill University Health Centre, Montréal, QC, Canada; Chronic Viral Illness Service, McGill University Health Centre, Montréal, QC, Canada; Division of Hematology, McGill University Health Centre, Montreal, QC, Canada
| | - Éric A Cohen
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | - Carine Van Lint
- Service of Molecular Virology, Department of Molecular Biology (DBM), Université libre de Bruxelles (ULB), 6041 Gosselies, Belgium.
| | - Petronela Ancuta
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, QC, Canada; Centre de recherche du centre hospitalier de l'Université de Montréal (CR-CHUM), Montréal, QC, Canada.
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2
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Wong H, Sugimura R. Immune-epigenetic crosstalk in haematological malignancies. Front Cell Dev Biol 2023; 11:1233383. [PMID: 37808081 PMCID: PMC10551137 DOI: 10.3389/fcell.2023.1233383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023] Open
Abstract
Haematological malignancies comprise a diverse set of lymphoid and myeloid neoplasms which can arise during any stage of haematopoiesis in the bone marrow. Accumulating evidence suggests that chronic inflammation generated by inflammatory cytokines secreted by tumour and the tumour-associated cells within the bone marrow microenvironment initiates signalling pathways in malignant cells, resulting in activation of master transcription factors including Smads, STAT3, and NF-κB which confer cancer stem cell phenotypes and drive disease progression. Deciphering the molecular mechanisms for how immune cells interact with malignant cells to induce such epigenetic modifications, specifically DNA methylation, histone modification, expression of miRNAs and lnRNAs to perturbate haematopoiesis could provide new avenues for developing novel targeted therapies for haematological malignancies. Here, the complex positive and negative feedback loops involved in inflammatory cytokine-induced cancer stem cell generation and drug resistance are reviewed to highlight the clinical importance of immune-epigenetic crosstalk in haematological malignancies.
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Affiliation(s)
| | - Ryohichi Sugimura
- School of Biomedical Sciences, Lee Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
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3
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Weivoda MM, Bradley EW. Macrophages and Bone Remodeling. J Bone Miner Res 2023; 38:359-369. [PMID: 36651575 PMCID: PMC10023335 DOI: 10.1002/jbmr.4773] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/19/2023]
Abstract
Bone remodeling in the adult skeleton facilitates the removal and replacement of damaged and old bone to maintain bone quality. Tight coordination of bone resorption and bone formation during remodeling crucially maintains skeletal mass. Increasing evidence suggests that many cell types beyond osteoclasts and osteoblasts support bone remodeling, including macrophages and other myeloid lineage cells. Herein, we discuss the origin and functions for macrophages in the bone microenvironment, tissue resident macrophages, osteomacs, as well as newly identified osteomorphs that result from osteoclast fission. We also touch on the role of macrophages during inflammatory bone resorption. © 2023 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
| | - Elizabeth W. Bradley
- Department of Orthopedics and Stem Cell Institute, University of Minnesota, Minneapolis, MN
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4
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Macrophages and Intervertebral Disc Degeneration. Int J Mol Sci 2023; 24:ijms24021367. [PMID: 36674887 PMCID: PMC9863885 DOI: 10.3390/ijms24021367] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/14/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023] Open
Abstract
The intervertebral disc (IVD) aids in motion and acts to absorb energy transmitted to the spine. With little inherent regenerative capacity, degeneration of the intervertebral disc results in intervertebral disc disease, which contributes to low back pain and significant disability in many individuals. Increasing evidence suggests that IVD degeneration is a disease of the whole joint that is associated with significant inflammation. Moreover, studies show elevated macrophage accumulation within the IVD with increasing levels of disease severity; however, we still need to understand the roles, be they causative or consequential, of macrophages during the degenerative process. In this narrative review, we discuss hallmarks of IVD degeneration, showcase evidence of macrophage involvement during disc degeneration, and explore burgeoning research aimed at understanding the molecular pathways regulating macrophage functions during intervertebral disc degeneration.
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Wang J, Liu YM, Hu J, Chen C. Trained immunity in monocyte/macrophage: Novel mechanism of phytochemicals in the treatment of atherosclerotic cardiovascular disease. Front Pharmacol 2023; 14:1109576. [PMID: 36895942 PMCID: PMC9989041 DOI: 10.3389/fphar.2023.1109576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/27/2023] [Indexed: 02/23/2023] Open
Abstract
Atherosclerosis (AS) is the pathology of atherosclerotic cardiovascular diseases (ASCVD), characterized by persistent chronic inflammation in the vessel wall, in which monocytes/macrophages play a key role. It has been reported that innate immune system cells can assume a persistent proinflammatory state after short stimulation with endogenous atherogenic stimuli. The pathogenesis of AS can be influenced by this persistent hyperactivation of the innate immune system, which is termed trained immunity. Trained immunity has also been implicated as a key pathological mechanism, leading to persistent chronic inflammation in AS. Trained immunity is mediated via epigenetic and metabolic reprogramming and occurs in mature innate immune cells and their bone marrow progenitors. Natural products are promising candidates for novel pharmacological agents that can be used to prevent or treat cardiovascular diseases (CVD). A variety of natural products and agents exhibiting antiatherosclerotic abilities have been reported to potentially interfere with the pharmacological targets of trained immunity. This review describes in as much detail as possible the mechanisms involved in trained immunity and how phytochemicals of this process inhibit AS by affecting trained monocytes/macrophages.
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Affiliation(s)
- Jie Wang
- Guang'anmen Hospital, China Academy of Chinese Medicine Sciences, Beijing, China
| | - Yong-Mei Liu
- Guang'anmen Hospital, China Academy of Chinese Medicine Sciences, Beijing, China
| | - Jun Hu
- Guang'anmen Hospital, China Academy of Chinese Medicine Sciences, Beijing, China
| | - Cong Chen
- Guang'anmen Hospital, China Academy of Chinese Medicine Sciences, Beijing, China
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6
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Cancer co-opts differentiation of B-cell precursors into macrophage-like cells. Nat Commun 2022; 13:5376. [PMID: 36104343 PMCID: PMC9474882 DOI: 10.1038/s41467-022-33117-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 08/31/2022] [Indexed: 11/08/2022] Open
Abstract
We have recently reported that some cancers induce accumulation of bone marrow (BM) B-cell precursors in the spleen to convert them into metastasis-promoting, immunosuppressive B cells. Here, using various murine tumor models and samples from humans with breast and ovarian cancers, we provide evidence that cancers also co-opt differentiation of these B-cell precursors to generate macrophage-like cells (termed B-MF). We link the transdifferentiation to a small subset of CSF1R+ Pax5Low cells within BM pre-B and immature B cells responding to cancer-secreted M-CSF with downregulation of the transcription factor Pax5 via CSF1R signaling. Although the primary source of tumor-associated macrophages is monocytes, B-MFs are phenotypically and functionally distinguishable. Compared to monocyte-derived macrophages, B-MFs more efficiently phagocytize apoptotic cells, suppress proliferation of T cells and induce FoxP3+ regulatory T cells. In mouse tumor models, B-MFs promote shrinkage of the tumor-infiltrating IFNγ+ CD4 T cell pool and increase cancer progression and metastasis, suggesting that this cancer-induced transdifferentiation pathway is functionally relevant and hence could serve as an immunotherapeutic target. The tumour microenvironment has been shown to change the phenotypes and functionality of immune cells to enable tumour propagation. Here authors show that cancers can derail B cell development to give rise to macrophage-like cells, contributing to cancer progression and metastasis via disabling local T cell response.
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7
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Chong YK, Tartey S, Yoshikawa Y, Imami K, Li S, Yoshinaga M, Hirabayashi A, Liu G, Vandenbon A, Hia F, Uehata T, Mino T, Suzuki Y, Noda T, Ferrandon D, Standley DM, Ishihama Y, Takeuchi O. Cyclin J-CDK complexes limit innate immune responses by reducing proinflammatory changes in macrophage metabolism. Sci Signal 2022; 15:eabm5011. [PMID: 35412849 DOI: 10.1126/scisignal.abm5011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Toll-like receptor (TLR) stimulation induces glycolysis and the production of mitochondrial reactive oxygen species (ROS), both of which are critical for inflammatory responses in macrophages. Here, we demonstrated that cyclin J, a TLR-inducible member of the cyclin family, reduced cytokine production in macrophages by coordinately controlling glycolysis and mitochondrial functions. Cyclin J interacted with cyclin-dependent kinases (CDKs), which increased the phosphorylation of a subset of CDK substrates, including the transcription factor FoxK1 and the GTPase Drp1. Cyclin J-dependent phosphorylation of FoxK1 decreased the transcription of glycolytic genes and Hif-1α activation, whereas hyperactivation of Drp1 by cyclin J-dependent phosphorylation promoted mitochondrial fragmentation and impaired the production of mitochondrial ROS. In mice, cyclin J in macrophages limited the growth of tumor xenografts and protected against LPS-induced shock but increased the susceptibility to bacterial infection. Collectively, our findings indicate that cyclin J-CDK signaling promotes antitumor immunity and the resolution of inflammation by opposing the metabolic changes that drive inflammatory responses in macrophages.
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Affiliation(s)
- Yee Kien Chong
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Sarang Tartey
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,IGM Biosciences Inc., Mountain View, CA, USA
| | - Yuki Yoshikawa
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Koshi Imami
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Songling Li
- Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Masanori Yoshinaga
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ai Hirabayashi
- Laboratory of Ultrastructural Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Guohao Liu
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Alexis Vandenbon
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Fabian Hia
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takuya Uehata
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takashi Mino
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba, Japan
| | - Takeshi Noda
- Laboratory of Ultrastructural Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | | | - Daron M Standley
- Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Yasushi Ishihama
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Osamu Takeuchi
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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8
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Aminu AJ, Petkova M, Atkinson AJ, Yanni J, Morris AD, Simms RT, Chen W, Yin Z, Kuniewicz M, Holda MK, Kuzmin VS, Perde F, Molenaar P, Dobrzynski H. Further insights into the molecular complexity of the human sinus node - The role of 'novel' transcription factors and microRNAs. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2021; 166:86-104. [PMID: 34004232 DOI: 10.1016/j.pbiomolbio.2021.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 02/06/2023]
Abstract
RESEARCH PURPOSE The sinus node (SN) is the heart's primary pacemaker. Key ion channels (mainly the funny channel, HCN4) and Ca2+-handling proteins in the SN are responsible for its function. Transcription factors (TFs) regulate gene expression through inhibition or activation and microRNAs (miRs) do this through inhibition. There is high expression of macrophages and mast cells within the SN connective tissue. 'Novel'/unexplored TFs and miRs in the regulation of ion channels and immune cells in the SN are not well understood. Using RNAseq and bioinformatics, the expression profile and predicted interaction of key TFs and cell markers with key miRs in the adult human SN vs. right atrial tissue (RA) were determined. PRINCIPAL RESULTS 68 and 60 TFs significantly more or less expressed in the SN vs. RA respectively. Among those more expressed were ISL1 and TBX3 (involved in embryonic development of the SN) and 'novel' RUNX1-2, CEBPA, GLI1-2 and SOX2. These TFs were predicted to regulate HCN4 expression in the SN. Markers for different cells: fibroblasts (COL1A1), fat (FABP4), macrophages (CSF1R and CD209), natural killer (GZMA) and mast (TPSAB1) were significantly more expressed in the SN vs. RA. Interestingly, RUNX1-3, CEBPA and GLI1 also regulate expression of these cells. MiR-486-3p inhibits HCN4 and markers involved in immune response. MAJOR CONCLUSIONS In conclusion, RUNX1-2, CSF1R, TPSAB1, COL1A1 and HCN4 are highly expressed in the SN but not miR-486-3p. Their complex interactions can be used to treat SN dysfunction such as bradycardia. Interestingly, another research group recently reported miR-486-3p is upregulated in blood samples from severe COVID-19 patients who suffer from bradycardia.
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Affiliation(s)
- Abimbola J Aminu
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Maria Petkova
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Andrew J Atkinson
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Joseph Yanni
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Alex D Morris
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Robert T Simms
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Weixuan Chen
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Zeyuan Yin
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom
| | - Marcin Kuniewicz
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom; Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland
| | - Mateusz K Holda
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom; Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland
| | - Vladislav S Kuzmin
- Department of Human and Animal Physiology, Lomonosov Moscow State University, Moscow, Russia
| | - Filip Perde
- National Institute of Legal Medicine, Bucharest, Romania
| | - Peter Molenaar
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, Australia; Cardiovascular Molecular & Therapeutics Translational Research Group, University of Queensland, The Prince Charles Hospital, Brisbane, Australia
| | - Halina Dobrzynski
- The Division of Cardiovascular Sciences, University of Manchester, United Kingdom; Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland.
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9
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Edgar L, Akbar N, Braithwaite AT, Krausgruber T, Gallart-Ayala H, Bailey J, Corbin AL, Khoyratty TE, Chai JT, Alkhalil M, Rendeiro AF, Ziberna K, Arya R, Cahill TJ, Bock C, Laurencikiene J, Crabtree MJ, Lemieux ME, Riksen NP, Netea MG, Wheelock CE, Channon KM, Rydén M, Udalova IA, Carnicer R, Choudhury RP. Hyperglycemia Induces Trained Immunity in Macrophages and Their Precursors and Promotes Atherosclerosis. Circulation 2021; 144:961-982. [PMID: 34255973 PMCID: PMC8448412 DOI: 10.1161/circulationaha.120.046464] [Citation(s) in RCA: 114] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 06/23/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cardiovascular risk in diabetes remains elevated despite glucose-lowering therapies. We hypothesized that hyperglycemia induces trained immunity in macrophages, promoting persistent proatherogenic characteristics. METHODS Bone marrow-derived macrophages from control mice and mice with diabetes were grown in physiological glucose (5 mmol/L) and subjected to RNA sequencing (n=6), assay for transposase accessible chromatin sequencing (n=6), and chromatin immunoprecipitation sequencing (n=6) for determination of hyperglycemia-induced trained immunity. Bone marrow transplantation from mice with (n=9) or without (n=6) diabetes into (normoglycemic) Ldlr-/- mice was used to assess its functional significance in vivo. Evidence of hyperglycemia-induced trained immunity was sought in human peripheral blood mononuclear cells from patients with diabetes (n=8) compared with control subjects (n=16) and in human atherosclerotic plaque macrophages excised by laser capture microdissection. RESULTS In macrophages, high extracellular glucose promoted proinflammatory gene expression and proatherogenic functional characteristics through glycolysis-dependent mechanisms. Bone marrow-derived macrophages from diabetic mice retained these characteristics, even when cultured in physiological glucose, indicating hyperglycemia-induced trained immunity. Bone marrow transplantation from diabetic mice into (normoglycemic) Ldlr-/- mice increased aortic root atherosclerosis, confirming a disease-relevant and persistent form of trained innate immunity. Integrated assay for transposase accessible chromatin, chromatin immunoprecipitation, and RNA sequencing analyses of hematopoietic stem cells and bone marrow-derived macrophages revealed a proinflammatory priming effect in diabetes. The pattern of open chromatin implicated transcription factor Runt-related transcription factor 1 (Runx1). Similarly, transcriptomes of atherosclerotic plaque macrophages and peripheral leukocytes in patients with type 2 diabetes were enriched for Runx1 targets, consistent with a potential role in human disease. Pharmacological inhibition of Runx1 in vitro inhibited the trained phenotype. CONCLUSIONS Hyperglycemia-induced trained immunity may explain why targeting elevated glucose is ineffective in reducing macrovascular risk in diabetes and suggests new targets for disease prevention and therapy.
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Affiliation(s)
- Laurienne Edgar
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Naveed Akbar
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Adam T. Braithwaite
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Thomas Krausgruber
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria (T.K., A.F.R., C.B.)
| | - Héctor Gallart-Ayala
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden (H.G.-A., C.E.W.)
- Department of Respiratory Medicine and Allergy (H.G.-A., C.E.W.), Karolinska University Hospital, Stockholm, Sweden
| | - Jade Bailey
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Alastair L. Corbin
- The Kennedy Institute of Rheumatology, University of Oxford, UK (A.L.C., T.E.K., I.A.U.)
| | - Tariq E. Khoyratty
- The Kennedy Institute of Rheumatology, University of Oxford, UK (A.L.C., T.E.K., I.A.U.)
| | - Joshua T. Chai
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Mohammad Alkhalil
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - André F. Rendeiro
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria (T.K., A.F.R., C.B.)
| | - Klemen Ziberna
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Ritu Arya
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Thomas J. Cahill
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria (T.K., A.F.R., C.B.)
- Institute of Artificial Intelligence and Decision Support, Center for Medical Statistics, Informatics, and Intelligent Systems, Medical University of Vienna, Austria (C.B.)
| | - Jurga Laurencikiene
- Department of Medicine (H7) (J.L., M.R.), Karolinska University Hospital, Stockholm, Sweden
| | - Mark J. Crabtree
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | | | - Niels P. Riksen
- Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands (N.P.R.., M.G.N.)
| | - Mihai G. Netea
- Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands (N.P.R.., M.G.N.)
- Department for Genomics & Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, Germany (M.G.N.)
| | - Craig E. Wheelock
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden (H.G.-A., C.E.W.)
- Department of Respiratory Medicine and Allergy (H.G.-A., C.E.W.), Karolinska University Hospital, Stockholm, Sweden
| | - Keith M. Channon
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Mikael Rydén
- Department of Medicine (H7) (J.L., M.R.), Karolinska University Hospital, Stockholm, Sweden
| | - Irina A. Udalova
- The Kennedy Institute of Rheumatology, University of Oxford, UK (A.L.C., T.E.K., I.A.U.)
| | - Ricardo Carnicer
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
| | - Robin P. Choudhury
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, UK (L.E., N.A., A.T.B., J.B., J.T.C., M.A., K.Z., R.A., T.J.C., M.J.C., K.M.C., R.C., R.P.C.)
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10
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Longo V, Longo A, Adamo G, Fiannaca A, Picciotto S, La Paglia L, Romancino D, La Rosa M, Urso A, Cibella F, Bongiovanni A, Colombo P. 2,2'4,4'-Tetrabromodiphenyl Ether (PBDE-47) Modulates the Intracellular miRNA Profile, sEV Biogenesis and Their miRNA Cargo Exacerbating the LPS-Induced Pro-Inflammatory Response in THP-1 Macrophages. Front Immunol 2021; 12:664534. [PMID: 34025666 PMCID: PMC8138315 DOI: 10.3389/fimmu.2021.664534] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/22/2021] [Indexed: 12/30/2022] Open
Abstract
The 2,2’4,4’-tetrabromodiphenyl ether (PBDE-47) is one of the most prominent PBDE congeners detected in the environment and in animal and human tissues. Animal model experiments suggested the occurrence of PBDE-induced immunotoxicity leading to different outcomes and recently we demonstrated that this substance can impair macrophage and basophil activities. In this manuscript, we decided to further examine the effects induced by PBDE-47 treatment on innate immune response by looking at the intracellular expression profile of miRNAs as well as the biogenesis, cargo content and activity of human M(LPS) macrophage cell-derived small extracellular vesicles (sEVs). Microarray and in silico analysis demonstrated that PBDE-47 can induce some epigenetic effects in M(LPS) THP-1 cells modulating the expression of a set of intracellular miRNAs involved in biological pathways regulating the expression of estrogen-mediated signaling and immune responses with particular reference to M1/M2 differentiation. In addition to the cell-intrinsic modulation of intracellular miRNAs, we demonstrated that PBDE-47 could also interfere with the biogenesis of sEVs increasing their number and selecting a de novo population of sEVs. Moreover, PBDE-47 induced the overload of specific immune related miRNAs in PBDE-47 derived sEVs. Finally, culture experiments with naïve M(LPS) macrophages demonstrated that purified PBDE-47 derived sEVs can modulate macrophage immune response exacerbating the LPS-induced pro-inflammatory response inducing the overexpression of the IL-6 and the MMP9 genes. Data from this study demonstrated that PBDE-47 can perturb the innate immune response at different levels modulating the intracellular expression of miRNAs but also interfering with the biogenesis, cargo content and functional activity of M(LPS) macrophage cell-derived sEVs.
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Affiliation(s)
- Valeria Longo
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Alessandra Longo
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Giorgia Adamo
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Antonino Fiannaca
- High Performance Computing and Networking Institute, National Research Council of Italy (ICAR-CNR), Palermo, Italy
| | - Sabrina Picciotto
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Laura La Paglia
- High Performance Computing and Networking Institute, National Research Council of Italy (ICAR-CNR), Palermo, Italy
| | - Daniele Romancino
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Massimo La Rosa
- High Performance Computing and Networking Institute, National Research Council of Italy (ICAR-CNR), Palermo, Italy
| | - Alfonso Urso
- High Performance Computing and Networking Institute, National Research Council of Italy (ICAR-CNR), Palermo, Italy
| | - Fabio Cibella
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Antonella Bongiovanni
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
| | - Paolo Colombo
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Palermo, Italy
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11
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Sletta KY, Castells O, Gjertsen BT. Colony Stimulating Factor 1 Receptor in Acute Myeloid Leukemia. Front Oncol 2021; 11:654817. [PMID: 33842370 PMCID: PMC8027480 DOI: 10.3389/fonc.2021.654817] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 03/03/2021] [Indexed: 11/13/2022] Open
Abstract
Acute myeloid leukemia (AML) is an aggressive heterogeneous blood cancer derived from hematopoietic stem cells. Tumor-stromal interactions in AML are of importance for disease development and therapy resistance, and bone marrow stroma seem like an attractive therapeutic target. Of particular interest is colony stimulating factor 1 receptor (CSF1R, M-CSFR, c-FMS, CD115) and its role in regulating plasticity of tumor-associated macrophages. We discuss first the potential of CSF1R-targeted therapy as an attractive concept with regards to the tumor microenvironment in the bone marrow niche. A second therapy approach, supported by preclinical research, also suggests that CSF1R-targeted therapy may increase the beneficial effect of conventional and novel therapeutics. Experimental evidence positioning inhibitors of CSF1R as treatment should, together with data from preclinical and early phase clinical trials, facilitate translation and clinical development of CSF1R-targeted therapy for AML.
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Affiliation(s)
- Kristine Yttersian Sletta
- CCBIO, Centre for Cancer Biomarkers, Department of Clinical Science, Precision Oncology Research Group, University of Bergen, Bergen, Norway
| | - Oriol Castells
- Department of Medicine, Hematology Section, Haukeland University Hospital, Bergen, Norway
| | - Bjørn Tore Gjertsen
- CCBIO, Centre for Cancer Biomarkers, Department of Clinical Science, Precision Oncology Research Group, University of Bergen, Bergen, Norway
- Department of Medicine, Hematology Section, Haukeland University Hospital, Bergen, Norway
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12
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Summers KM, Bush SJ, Hume DA. Network analysis of transcriptomic diversity amongst resident tissue macrophages and dendritic cells in the mouse mononuclear phagocyte system. PLoS Biol 2020; 18:e3000859. [PMID: 33031383 PMCID: PMC7575120 DOI: 10.1371/journal.pbio.3000859] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 10/20/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023] Open
Abstract
The mononuclear phagocyte system (MPS) is a family of cells including progenitors, circulating blood monocytes, resident tissue macrophages, and dendritic cells (DCs) present in every tissue in the body. To test the relationships between markers and transcriptomic diversity in the MPS, we collected from National Center for Biotechnology Information Gene Expression Omnibus (NCBI-GEO) a total of 466 quality RNA sequencing (RNA-seq) data sets generated from mouse MPS cells isolated from bone marrow, blood, and multiple tissues. The primary data were randomly downsized to a depth of 10 million reads and requantified. The resulting data set was clustered using the network analysis tool BioLayout. A sample-to-sample matrix revealed that MPS populations could be separated based upon tissue of origin. Cells identified as classical DC subsets, cDC1s and cDC2s, and lacking Fcgr1 (encoding the protein CD64) were contained within the MPS cluster, no more distinct than other MPS cells. A gene-to-gene correlation matrix identified large generic coexpression clusters associated with MPS maturation and innate immune function. Smaller coexpression gene clusters, including the transcription factors that drive them, showed higher expression within defined isolated cells, including monocytes, macrophages, and DCs isolated from specific tissues. They include a cluster containing Lyve1 that implies a function in endothelial cell (EC) homeostasis, a cluster of transcripts enriched in intestinal macrophages, and a generic lymphoid tissue cDC cluster associated with Ccr7. However, transcripts encoding Adgre1, Itgax, Itgam, Clec9a, Cd163, Mertk, Mrc1, Retnla, and H2-a/e (encoding class II major histocompatibility complex [MHC] proteins) and many other proposed macrophage subset and DC lineage markers each had idiosyncratic expression profiles. Coexpression of immediate early genes (for example, Egr1, Fos, Dusp1) and inflammatory cytokines and chemokines (tumour necrosis factor [Tnf], Il1b, Ccl3/4) indicated that all tissue disaggregation and separation protocols activate MPS cells. Tissue-specific expression clusters indicated that all cell isolation procedures also co-purify other unrelated cell types that may interact with MPS cells in vivo. Comparative analysis of RNA-seq and single-cell RNA-seq (scRNA-seq) data from the same lung cell populations indicated that MPS heterogeneity implied by global cluster analysis may be even greater at a single-cell level. This analysis highlights the power of large data sets to identify the diversity of MPS cellular phenotypes and the limited predictive value of surface markers to define lineages, functions, or subpopulations.
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Affiliation(s)
- Kim M. Summers
- Mater Research Institute-University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Stephen J. Bush
- Nuffield Department of Clinical Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - David A. Hume
- Mater Research Institute-University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
- * E-mail:
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13
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Röhl S, Rykaczewska U, Seime T, Suur BE, Diez MG, Gådin JR, Gainullina A, Sergushichev AA, Wirka R, Lengquist M, Kronqvist M, Bergman O, Odeberg J, Lindeman JHN, Quertermous T, Hamsten A, Eriksson P, Hedin U, Razuvaev A, Matic LP. Transcriptomic profiling of experimental arterial injury reveals new mechanisms and temporal dynamics in vascular healing response. JVS Vasc Sci 2020; 1:13-27. [PMID: 34617037 PMCID: PMC8489224 DOI: 10.1016/j.jvssci.2020.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 01/31/2020] [Indexed: 12/23/2022] Open
Abstract
Objective Endovascular interventions cause arterial injury and induce a healing response to restore vessel wall homeostasis. Complications of defective or excessive healing are common and result in increased morbidity and repeated interventions. Experimental models of intimal hyperplasia are vital for understanding the vascular healing mechanisms and resolving the clinical problems of restenosis, vein graft stenosis, and dialysis access failure. Our aim was to systematically investigate the transcriptional, histologic, and systemic reaction to vascular injury during a prolonged time. Methods Balloon injury of the left common carotid artery was performed in male rats. Animals (n = 69) were euthanized before or after injury, either directly or after 2 hours, 20 hours, 2 days, 5 days, 2 weeks, 6 weeks, and 12 weeks. Both injured and contralateral arteries were subjected to microarray profiling, followed by bioinformatic exploration, histologic characterization of the biopsy specimens, and plasma lipid analyses. Results Immune activation and coagulation were key mechanisms in the early response, followed by cytokine release, tissue remodeling, and smooth muscle cell modulation several days after injury, with reacquisition of contractile features in later phases. Novel pathways related to clonal expansion, inflammatory transformation, and chondro-osteogenic differentiation were identified and immunolocalized to neointimal smooth muscle cells. Analysis of uninjured arteries revealed a systemic component of the reaction after local injury, underlined by altered endothelial signaling, changes in overall tissue bioenergy metabolism, and plasma high-density lipoprotein levels. Conclusions We demonstrate that vascular injury induces dynamic transcriptional landscape and metabolic changes identifiable as early, intermediate, and late response phases, reaching homeostasis after several weeks. This study provides a temporal “roadmap” of vascular healing as a publicly available resource for the research community. Endovascular intervention causes an injury to the arterial wall that subsequently induces a healing response to restore the vessel wall homeostasis. Complications after vascular interventions related to defective or excessive healing response, such as thrombosis or restenosis, are common and result in increased morbidity, suffering of the patient, need for repeated interventions, and possibly death. Thus, there is a need for better understanding of the underlying molecular mechanisms during vascular injury and healing response to identify and to assess the risk of complications in patients. Using an experimental model of vascular injury, this study demonstrates the full landscape of dynamic transcriptional changes in the resolution of vascular injury, accompanied also by systemic variations in plasma lipid levels and reaching homeostasis several weeks after injury. These results can guide the development of new strategies and molecular targets for modulation of the intimal response on endovascular interventions.
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Affiliation(s)
- Samuel Röhl
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Urszula Rykaczewska
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Till Seime
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Bianca E Suur
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | | | - Jesper R Gådin
- Department of Medicine, Karolinska Institutet, Solna, Sweden
| | | | | | - Robert Wirka
- Department of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, Calif
| | - Mariette Lengquist
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Malin Kronqvist
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Otto Bergman
- Department of Medicine, Karolinska Institutet, Solna, Sweden
| | - Jacob Odeberg
- Department of Protein Science, School of Chemistry, Biotechnology and Health, Royal Institute of Technology, Science for Life Laboratory, Sweden and the Department of Haematology, Coagulation Unit, Karolinska University Hospital, Stockholm, Sweden
| | | | - Thomas Quertermous
- Department of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, Calif
| | - Anders Hamsten
- Department of Medicine, Karolinska Institutet, Solna, Sweden
| | - Per Eriksson
- Department of Medicine, Karolinska Institutet, Solna, Sweden
| | - Ulf Hedin
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
| | - Anton Razuvaev
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
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14
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Zhou C, Li J, Liu L, Tang Z, Wan F, Lan L. Expression and localization of MrgprD in mouse intestinal tract. Cell Tissue Res 2019; 377:259-268. [PMID: 30919047 PMCID: PMC6647478 DOI: 10.1007/s00441-019-03017-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 03/09/2019] [Indexed: 12/16/2022]
Abstract
MrgprD, a Mas-related G protein-coupled receptor, is initially identified in sensory neurons of mouse dorsal root ganglia (DRG) and has been suggested to participate in somatosensation. However, MrgprD has recently been found to be expressed outside the nervous system such as in aortic endothelia cells and neutrophils. In this study, we used immunohistochemistry to detect the expression and localization of MrgprD in mouse intestinal tract. The immunoreactivity (IR) of MrgprD was found in the smooth muscle layers of small intestine, colon and rectum. In addition, MrgprD IR was colocalized with F4/80-positive macrophages and CD3-positive T lymphocytes resident in the lamina propria of intestinal mucosa. MrgprD was also found to be expressed in primary peritoneal macrophages and splenic T lymphocytes. Furthermore, the presence of MrgprD mRNA and its protein was detected in murine macrophage-like RAW 264.7 and human T lymphocyte Jurkat cell lines. Our study shows, for the first time, the expression and localization of MrgprD in the intestinal tract and in macrophages and T lymphocytes, indicating the potential roles of MrgprD in intestinal mobility and immunity.
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Affiliation(s)
- Chenxing Zhou
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023 Jiangsu People’s Republic of China
| | - Jia Li
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023 Jiangsu People’s Republic of China
| | - Lin Liu
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023 Jiangsu People’s Republic of China
| | - Zongxiang Tang
- Key Laboratory of Chinese Medicine for Prevention and Treatment of Neurological Diseases, School of Medicine and Life Sciences, Nanjing University of Chinese Medicine, Nanjing, 210023 Jiangsu People’s Republic of China
| | - Fengyi Wan
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205 USA
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205 USA
- Department of Oncology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205 USA
| | - Lei Lan
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023 Jiangsu People’s Republic of China
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15
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Hume DA, Caruso M, Ferrari-Cestari M, Summers KM, Pridans C, Irvine KM. Phenotypic impacts of CSF1R deficiencies in humans and model organisms. J Leukoc Biol 2019; 107:205-219. [PMID: 31330095 DOI: 10.1002/jlb.mr0519-143r] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/20/2019] [Accepted: 07/01/2019] [Indexed: 12/12/2022] Open
Abstract
Mϕ proliferation, differentiation, and survival are controlled by signals from the Mϕ CSF receptor (CSF1R). Mono-allelic gain-of-function mutations in CSF1R in humans are associated with an autosomal-dominant leukodystrophy and bi-allelic loss-of-function mutations with recessive skeletal dysplasia, brain disorders, and developmental anomalies. Most of the phenotypes observed in these human disease states are also observed in mice and rats with loss-of-function mutations in Csf1r or in Csf1 encoding one of its two ligands. Studies in rodent models also highlight the importance of genetic background and likely epistatic interactions between Csf1r and other loci. The impacts of Csf1r mutations on the brain are usually attributed solely to direct impacts on microglial number and function. However, analysis of hypomorphic Csf1r mutants in mice and several other lines of evidence suggest that primary hydrocephalus and loss of the physiological functions of Mϕs in the periphery contribute to the development of brain pathology. In this review, we outline the evidence that CSF1R is expressed exclusively in mononuclear phagocytes and explore the mechanisms linking CSF1R mutations to pleiotropic impacts on postnatal growth and development.
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Affiliation(s)
- David A Hume
- Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Melanie Caruso
- Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | | | - Kim M Summers
- Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Clare Pridans
- Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Katharine M Irvine
- Mater Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
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16
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Rojo R, Raper A, Ozdemir DD, Lefevre L, Grabert K, Wollscheid-Lengeling E, Bradford B, Caruso M, Gazova I, Sánchez A, Lisowski ZM, Alves J, Molina-Gonzalez I, Davtyan H, Lodge RJ, Glover JD, Wallace R, Munro DAD, David E, Amit I, Miron VE, Priller J, Jenkins SJ, Hardingham GE, Blurton-Jones M, Mabbott NA, Summers KM, Hohenstein P, Hume DA, Pridans C. Deletion of a Csf1r enhancer selectively impacts CSF1R expression and development of tissue macrophage populations. Nat Commun 2019; 10:3215. [PMID: 31324781 PMCID: PMC6642117 DOI: 10.1038/s41467-019-11053-8] [Citation(s) in RCA: 185] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 06/15/2019] [Indexed: 02/06/2023] Open
Abstract
The proliferation, differentiation and survival of mononuclear phagocytes depend on signals from the receptor for macrophage colony-stimulating factor, CSF1R. The mammalian Csf1r locus contains a highly conserved super-enhancer, the fms-intronic regulatory element (FIRE). Here we show that genomic deletion of FIRE in mice selectively impacts CSF1R expression and tissue macrophage development in specific tissues. Deletion of FIRE ablates macrophage development from murine embryonic stem cells. Csf1rΔFIRE/ΔFIRE mice lack macrophages in the embryo, brain microglia and resident macrophages in the skin, kidney, heart and peritoneum. The homeostasis of other macrophage populations and monocytes is unaffected, but monocytes and their progenitors in bone marrow lack surface CSF1R. Finally, Csf1rΔFIRE/ΔFIRE mice are healthy and fertile without the growth, neurological or developmental abnormalities reported in Csf1r-/- rodents. Csf1rΔFIRE/ΔFIRE mice thus provide a model to explore the homeostatic, physiological and immunological functions of tissue-specific macrophage populations in adult animals.
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Affiliation(s)
- Rocío Rojo
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Av. Ignacio Morones Prieto 3000 Pte, Col. Los Doctores, C.P. 64710, Monterrey, N.L., Mexico
| | - Anna Raper
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Derya D Ozdemir
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Lucas Lefevre
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Kathleen Grabert
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
- Department of Environmental Medicine, Toxicology Unit, Karolinska Institutet, Box 210, SE-171 77, Stockholm, Sweden
| | - Evi Wollscheid-Lengeling
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Barry Bradford
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Melanie Caruso
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Iveta Gazova
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Alejandra Sánchez
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Zofia M Lisowski
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Joana Alves
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Irene Molina-Gonzalez
- The MRC University of Edinburgh Centre for Reproductive Health, The Queen's Medical Research Institute, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Hayk Davtyan
- Department of Neurobiology and Behavior, University of California Irvine, 3014 Gross Hall 845 Health Sciences Rd, Irvine, CA, 92697-1705, USA
| | - Rebecca J Lodge
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - James D Glover
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Robert Wallace
- The Department of Orthopedic Surgery, University of Edinburgh, Chancellor's Building, Edinburgh BioQuarter, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - David A D Munro
- UK Dementia Research Institute, The University of Edinburgh, Chancellor's Building, Edinburgh BioQuarter, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Eyal David
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot, 7610001, Israel
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot, 7610001, Israel
| | - Véronique E Miron
- The MRC University of Edinburgh Centre for Reproductive Health, The Queen's Medical Research Institute, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Josef Priller
- UK Dementia Research Institute, The University of Edinburgh, Chancellor's Building, Edinburgh BioQuarter, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Stephen J Jenkins
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Giles E Hardingham
- UK Dementia Research Institute, The University of Edinburgh, Chancellor's Building, Edinburgh BioQuarter, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
- Centre for Discovery Brain Sciences, University of Edinburgh, Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK
| | - Mathew Blurton-Jones
- Department of Neurobiology and Behavior, University of California Irvine, 3014 Gross Hall 845 Health Sciences Rd, Irvine, CA, 92697-1705, USA
| | - Neil A Mabbott
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Kim M Summers
- Mater Research Institute-University of Queensland, Translational Research Institute, Woolloongabba, QLD, 4102, Australia
| | - Peter Hohenstein
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
- Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
| | - David A Hume
- Mater Research Institute-University of Queensland, Translational Research Institute, Woolloongabba, QLD, 4102, Australia.
| | - Clare Pridans
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.
- Simons Initiative for the Developing Brain, Centre for Discovery Brain Sciences, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh, EH8 9XD, UK.
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17
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Gonzalez-Junca A, Driscoll KE, Pellicciotta I, Du S, Lo CH, Roy R, Parry R, Tenvooren I, Marquez DM, Spitzer MH, Barcellos-Hoff MH. Autocrine TGFβ Is a Survival Factor for Monocytes and Drives Immunosuppressive Lineage Commitment. Cancer Immunol Res 2018; 7:306-320. [PMID: 30538091 DOI: 10.1158/2326-6066.cir-18-0310] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/06/2018] [Accepted: 12/07/2018] [Indexed: 12/22/2022]
Abstract
Transforming growth factor β (TGFβ) is an effector of immune suppression and contributes to a permissive tumor microenvironment that compromises effective immunotherapy. We identified a correlation between TGFB1 and genes expressed by myeloid cells, but not granulocytes, in The Cancer Genome Atlas lung adenocarcinoma data, in which high TGFB1 expression was associated with poor survival. To determine whether TGFβ affected cell fate decisions and lineage commitment, we studied primary cultures of CD14+ monocytes isolated from peripheral blood of healthy donors. We discovered that TGFβ was a survival factor for CD14+ monocytes, which rapidly executed an apoptotic program in its absence. Continued exposure to TGFβ in combination with granulocyte-macrophage colony stimulating factor (GM-CSF) and interleukin 6 (IL6) amplified HLA-DRlowCD14+CD11b+CD33+ myeloid-derived suppressor cells (MDSCs) at the expense of macrophage and dendritic cell (DC) differentiation. MDSCs generated in the presence of TGFβ were more effective in suppressing T-cell proliferation and promoted the T regulatory cell phenotype. In contrast, inhibition of TGFβ signaling using a small-molecule inhibitor of receptor kinase activity in CD14+ monocytes treated with GM-CSF and IL6 decreased MDSC differentiation and increased differentiation to proinflammatory macrophages and antigen-presenting DCs. The effect of autocrine and paracrine TGFβ on myeloid cell survival and lineage commitment suggests that pharmacologic inhibition of TGFβ-dependent signaling in cancer would favor antitumor immunity.
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Affiliation(s)
- Alba Gonzalez-Junca
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California.,Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - Kyla E Driscoll
- TGFβ and Tumor Microenvironment, Eli Lilly and Company, New York, New York
| | - Ilenia Pellicciotta
- Department of Radiation Oncology, New York University School of Medicine, New York, New York
| | - Shisuo Du
- Department of Radiation Oncology, New York University School of Medicine, New York, New York
| | - Chen Hao Lo
- Department of Radiation Oncology, New York University School of Medicine, New York, New York.,Department of Tumor Biology, Moffitt Cancer Center, Tampa, Florida
| | - Ritu Roy
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California.,Computational Biology and Informatics (CBI), University of California San Francisco, San Francisco, California
| | - Renate Parry
- Varian Medical Systems, Inc., Palo Alto, California
| | - Iliana Tenvooren
- Parker Institute for Cancer Immunotherapy, Department of Otolaryngology-Head and Neck Surgery, Department of Microbiology and Immunology, UCSF School of Medicine, San Francisco, California
| | - Diana M Marquez
- Parker Institute for Cancer Immunotherapy, Department of Otolaryngology-Head and Neck Surgery, Department of Microbiology and Immunology, UCSF School of Medicine, San Francisco, California
| | - Matthew H Spitzer
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California.,Parker Institute for Cancer Immunotherapy, Department of Otolaryngology-Head and Neck Surgery, Department of Microbiology and Immunology, UCSF School of Medicine, San Francisco, California
| | - Mary Helen Barcellos-Hoff
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California. .,Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
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18
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The evolution of the macrophage-specific enhancer (Fms intronic regulatory element) within the CSF1R locus of vertebrates. Sci Rep 2017; 7:17115. [PMID: 29215000 PMCID: PMC5719456 DOI: 10.1038/s41598-017-15999-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 11/03/2017] [Indexed: 01/07/2023] Open
Abstract
The Csf1r locus encodes the receptor for macrophage colony-stimulating factor, which controls the proliferation, differentiation and survival of macrophages. The 300 bp Fms intronic regulatory element (FIRE), within the second intron of Csf1r, is necessary and sufficient to direct macrophage-specific transcription. We have analysed the conservation and divergence of the FIRE DNA sequence in vertebrates. FIRE is present in the same location in the Csf1r locus in reptile, avian and mammalian genomes. Nearest neighbor analysis based upon this element alone largely recapitulates phylogenies inferred from much larger genomic sequence datasets. One core element, containing binding sites for AP1 family and the macrophage-specific transcription factor, PU.1, is conserved from lizards to humans. Around this element, the FIRE sequence is conserved within clades with the most conserved elements containing motifs for known myeloid-expressed transcription factors. Conversely, there is little alignment between clades outside the AP1/PU.1 element. The analysis favours a hybrid between “enhanceosome” and “smorgasbord” models of enhancer function, in which elements cooperate to bind components of the available transcription factor milieu.
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19
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Transcriptional mechanisms that control expression of the macrophage colony-stimulating factor receptor locus. Clin Sci (Lond) 2017; 131:2161-2182. [DOI: 10.1042/cs20170238] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/22/2017] [Accepted: 06/11/2017] [Indexed: 12/17/2022]
Abstract
The proliferation, differentiation, and survival of cells of the macrophage lineage depends upon signals from the macrophage colony-stimulating factor (CSF) receptor (CSF1R). CSF1R is expressed by embryonic macrophages and induced early in adult hematopoiesis, upon commitment of multipotent progenitors to the myeloid lineage. Transcriptional activation of CSF1R requires interaction between members of the E26 transformation-specific family of transcription factors (Ets) (notably PU.1), C/EBP, RUNX, AP-1/ATF, interferon regulatory factor (IRF), STAT, KLF, REL, FUS/TLS (fused in sarcoma/ranslocated in liposarcoma) families, and conserved regulatory elements within the mouse and human CSF1R locus. One element, the Fms-intronic regulatory element (FIRE), within intron 2, is conserved functionally across all the amniotes. Lineage commitment in multipotent progenitors also requires down-regulation of specific transcription factors such as MYB, FLI1, basic leucine zipper transcriptional factor ATF-like (BATF3), GATA-1, and PAX5 that contribute to differentiation of alternative lineages and repress CSF1R transcription. Many of these transcription factors regulate each other, interact at the protein level, and are themselves downstream targets of CSF1R signaling. Control of CSF1R transcription involves feed–forward and feedback signaling in which CSF1R is both a target and a participant; and dysregulation of CSF1R expression and/or function is associated with numerous pathological conditions. In this review, we describe the regulatory network behind CSF1R expression during differentiation and development of cells of the mononuclear phagocyte system.
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20
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Pridans C, Davis GM, Sauter KA, Lisowski ZM, Corripio-Miyar Y, Raper A, Lefevre L, Young R, McCulloch ME, Lillico S, Milne E, Whitelaw B, Hume DA. A Csf1r-EGFP Transgene Provides a Novel Marker for Monocyte Subsets in Sheep. THE JOURNAL OF IMMUNOLOGY 2016; 197:2297-305. [PMID: 27521343 PMCID: PMC5009875 DOI: 10.4049/jimmunol.1502336] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 07/15/2016] [Indexed: 12/12/2022]
Abstract
Expression of Csf1r in adults is restricted to cells of the macrophage lineage. Transgenic reporters based upon the Csf1r locus require inclusion of the highly conserved Fms-intronic regulatory element for expression. We have created Csf1r-EGFP transgenic sheep via lentiviral transgenesis of a construct containing elements of the mouse Fms-intronic regulatory element and Csf1r promoter. Committed bone marrow macrophage precursors and blood monocytes express EGFP in these animals. Sheep monocytes were divided into three populations, similar to classical, intermediate, and nonclassical monocytes in humans, based upon CD14 and CD16 expression. All expressed EGFP, with increased levels in the nonclassical subset. Because Csf1r expression coincides with the earliest commitment to the macrophage lineage, Csf1r-EGFP bone marrow provides a tool for studying the earliest events in myelopoiesis using the sheep as a model.
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Affiliation(s)
- Clare Pridans
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Gemma M Davis
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Kristin A Sauter
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Zofia M Lisowski
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | | | - Anna Raper
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Lucas Lefevre
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Rachel Young
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Mary E McCulloch
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Simon Lillico
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - Elspeth Milne
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, United Kingdom
| | - Bruce Whitelaw
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
| | - David A Hume
- The Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom; and
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21
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Voon DCC, Hor YT, Ito Y. The RUNX complex: reaching beyond haematopoiesis into immunity. Immunology 2015; 146:523-36. [PMID: 26399680 DOI: 10.1111/imm.12535] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 07/13/2015] [Accepted: 07/15/2015] [Indexed: 12/24/2022] Open
Abstract
Among their diverse roles as transcriptional regulators during development and cell fate specification, the RUNX transcription factors are best known for the parts they play in haematopoiesis. RUNX proteins are expressed throughout all haematopoietic lineages, being necessary for the emergence of the first haematopoietic stem cells to their terminal differentiation. Although much progress has been made since their discoveries almost two decades ago, current appreciation of RUNX in haematopoiesis is largely grounded in their lineage-specifying roles. In contrast, the importance of RUNX to immunity has been mostly obscured for historic, technical and conceptual reasons. However, this paradigm is likely to shift over time, as a primary purpose of haematopoiesis is to resource the immune system. Furthermore, recent evidence suggests a role for RUNX in the innate immunity of non-haematopoietic cells. This review takes a haematopoiesis-centric approach to collate what is known of RUNX's contribution to the overall mammalian immune system and discuss their growing prominence in areas such as autoimmunity, inflammatory diseases and mucosal immunity.
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Affiliation(s)
- Dominic Chih-Cheng Voon
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan.,Division of Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | | | - Yoshiaki Ito
- Cancer Biology Programme, Cancer Science Institute of Singapore, Singapore
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22
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Lie-A-Ling M, Marinopoulou E, Li Y, Patel R, Stefanska M, Bonifer C, Miller C, Kouskoff V, Lacaud G. RUNX1 positively regulates a cell adhesion and migration program in murine hemogenic endothelium prior to blood emergence. Blood 2014; 124:e11-20. [PMID: 25082880 DOI: 10.1182/blood-2014-04-572958] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
During ontogeny, the transcription factor RUNX1 governs the emergence of definitive hematopoietic cells from specialized endothelial cells called hemogenic endothelium (HE). The ultimate consequence of this endothelial-to-hematopoietic transition is the concomitant activation of the hematopoietic program and downregulation of the endothelial program. However, due to the rare and transient nature of the HE, little is known about the initial role of RUNX1 within this population. We, therefore, developed and implemented a highly sensitive DNA adenine methyltransferase identification-based methodology, including a novel data analysis pipeline, to map early RUNX1 transcriptional targets in HE cells. This novel transcription factor binding site identification protocol should be widely applicable to other low abundance cell types and factors. Integration of the RUNX1 binding profile with gene expression data revealed an unexpected early role for RUNX1 as a positive regulator of cell adhesion- and migration-associated genes within the HE. This suggests that RUNX1 orchestrates HE cell positioning and integration prior to the release of hematopoietic cells. Overall, our genome-wide analysis of the RUNX1 binding and transcriptional profile in the HE provides a novel comprehensive resource of target genes that will facilitate the precise dissection of the role of RUNX1 in early blood development.
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Affiliation(s)
| | - Elli Marinopoulou
- Cancer Research UK Stem Cell Biology Group, and Cancer Research UK Computational Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, United Kingdom
| | - Yaoyong Li
- Cancer Research UK Computational Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, United Kingdom
| | | | - Monika Stefanska
- Faculty of Biochemistry, Biophysics and Biotechnology Department, Jagiellonian University, Kraków, Poland
| | - Constanze Bonifer
- Institute of Biomedical Research, University of Birmingham, Birmingham, United Kingdom; and
| | - Crispin Miller
- Cancer Research UK Computational Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, United Kingdom
| | - Valerie Kouskoff
- Cancer Research UK Stem Cell Haematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, United Kingdom
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23
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Sauter KA, Pridans C, Sehgal A, Bain CC, Scott C, Moffat L, Rojo R, Stutchfield BM, Davies CL, Donaldson DS, Renault K, McColl BW, Mowat AM, Serrels A, Frame MC, Mabbott NA, Hume DA. The MacBlue binary transgene (csf1r-gal4VP16/UAS-ECFP) provides a novel marker for visualisation of subsets of monocytes, macrophages and dendritic cells and responsiveness to CSF1 administration. PLoS One 2014; 9:e105429. [PMID: 25137049 PMCID: PMC4138162 DOI: 10.1371/journal.pone.0105429] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 07/17/2014] [Indexed: 01/09/2023] Open
Abstract
The MacBlue transgenic mouse uses the Csf1r promoter and first intron to drive expression of gal4-VP16, which in turn drives a cointegrated gal4-responsive UAS-ECFP cassette. The Csf1r promoter region used contains a deletion of a 150 bp conserved region covering trophoblast and osteoclast-specific transcription start sites. In this study, we examined expression of the transgene in embryos and adult mice. In embryos, ECFP was expressed in the large majority of macrophages derived from the yolk sac, and as the liver became a major site of monocytopoiesis. In adults, ECFP was detected at high levels in both Ly6C+ and Ly6C- monocytes and distinguished them from Ly6C+, F4/80+, CSF1R+ immature myeloid cells in peripheral blood. ECFP was also detected in the large majority of microglia and Langerhans cells. However, expression was lost from the majority of tissue macrophages, including Kupffer cells in the liver and F4/80+ macrophages of the lung, kidney, spleen and intestine. The small numbers of positive cells isolated from the liver resembled blood monocytes. In the gut, ECFP+ cells were identified primarily as classical dendritic cells or blood monocytes in disaggregated cell preparations. Immunohistochemistry showed large numbers of ECFP+ cells in the Peyer's patch and isolated lymphoid follicles. The MacBlue transgene was used to investigate the effect of treatment with CSF1-Fc, a form of the growth factor with longer half-life and efficacy. CSF1-Fc massively expanded both the immature myeloid cell (ECFP-) and Ly6C+ monocyte populations, but had a smaller effect on Ly6C- monocytes. There were proportional increases in ECFP+ cells detected in lung and liver, consistent with monocyte infiltration, but no generation of ECFP+ Kupffer cells. In the gut, there was selective infiltration of large numbers of cells into the lamina propria and Peyer's patches. We discuss the use of the MacBlue transgene as a marker of monocyte/macrophage/dendritic cell differentiation.
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Affiliation(s)
- Kristin A. Sauter
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Clare Pridans
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Anuj Sehgal
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Calum C. Bain
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Charlotte Scott
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Lindsey Moffat
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Rocío Rojo
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Ben M. Stutchfield
- MRC Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, Midlothian, Scotland, United Kingdom
| | - Claire L. Davies
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - David S. Donaldson
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Kathleen Renault
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Barry W. McColl
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - Alan M. Mowat
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Alan Serrels
- Edinburgh Cancer Research Centre, University of Edinburgh, Edinburgh, Midlothian, Scotland, United Kingdom
| | - Margaret C. Frame
- Edinburgh Cancer Research Centre, University of Edinburgh, Edinburgh, Midlothian, Scotland, United Kingdom
| | - Neil A. Mabbott
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
| | - David A. Hume
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland, United Kingdom
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24
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ISLAM RABIA, YOON WONJOON, WOO KYUNGMI, BAEK JEONGHWA, RYOO HYUNMO. Pin1-Mediated Prolyl Isomerization of Runx1 Affects PU.1 Expression in Pre-Monocytes. J Cell Physiol 2013; 229:443-52. [DOI: 10.1002/jcp.24462] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 08/27/2013] [Indexed: 01/08/2023]
Affiliation(s)
- RABIA ISLAM
- Department of Molecular Genetics; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - WON-JOON YOON
- Department of Molecular Genetics; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - KYUNG-MI WOO
- Department of Molecular Genetics; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - JEONG-HWA BAEK
- Department of Molecular Genetics; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - HYUN-MO RYOO
- Department of Molecular Genetics; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
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25
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Sauter KA, Bouhlel MA, O’Neal J, Sester DP, Tagoh H, Ingram RM, Pridans C, Bonifer C, Hume DA. The function of the conserved regulatory element within the second intron of the mammalian Csf1r locus. PLoS One 2013; 8:e54935. [PMID: 23383005 PMCID: PMC3561417 DOI: 10.1371/journal.pone.0054935] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 12/18/2012] [Indexed: 01/09/2023] Open
Abstract
The gene encoding the receptor for macrophage colony-stimulating factor (CSF-1R) is expressed exclusively in cells of the myeloid lineages as well as trophoblasts. A conserved element in the second intron, Fms-Intronic Regulatory Element (FIRE), is essential for macrophage-specific transcription of the gene. However, the molecular details of how FIRE activity is regulated and how it impacts the Csf1r promoter have not been characterised. Here we show that agents that down-modulate Csf1r mRNA transcription regulated promoter activity altered the occupancy of key FIRE cis-acting elements including RUNX1, AP1, and Sp1 binding sites. We demonstrate that FIRE acts as an anti-sense promoter in macrophages and reversal of FIRE orientation within its native context greatly reduced enhancer activity in macrophages. Mutation of transcription initiation sites within FIRE also reduced transcription. These results demonstrate that FIRE is an orientation-specific transcribed enhancer element.
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Affiliation(s)
- Kristin A. Sauter
- Developmental Biology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
| | - M. Amine Bouhlel
- Section of Experimental Haematology, Leeds Institute of Molecular Medicine, University of Leeds, St James’s University Hospital, Leeds, United Kingdom
| | - Julie O’Neal
- Developmental Biology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
| | - David P. Sester
- Developmental Biology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
| | - Hiromi Tagoh
- Section of Experimental Haematology, Leeds Institute of Molecular Medicine, University of Leeds, St James’s University Hospital, Leeds, United Kingdom
| | - Richard M. Ingram
- Section of Experimental Haematology, Leeds Institute of Molecular Medicine, University of Leeds, St James’s University Hospital, Leeds, United Kingdom
| | - Clare Pridans
- Developmental Biology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
| | - Constanze Bonifer
- Section of Experimental Haematology, Leeds Institute of Molecular Medicine, University of Leeds, St James’s University Hospital, Leeds, United Kingdom
- School of Cancer Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - David A. Hume
- Developmental Biology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
- * E-mail:
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26
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Abstract
Macrophages not only are prominent effector cells of the immune system that are critical in inflammation and innate immune responses but also fulfill important functions in tissue homeostasis. Transcription factors can define macrophage identity and control their numbers and functions through the induction and maintenance of specific transcriptional programs. Here, we review the mechanisms employed by lineage-specific transcription factors to shape macrophage identity during the development from hematopoietic stem and progenitor cells. We also present current insight into how specific transcription factors control macrophage numbers, by regulating coordinated proliferation and differentiation of myeloid progenitor cells and self-renewal of mature macrophages. We finally discuss how functional specialization of mature macrophages in response to environmental stimuli can be induced through synergistic activity of lineage- and stimulus-specific transcription factors that plug into preexisting transcriptional programs. Understanding the mechanisms that define macrophage identity, numbers, and functions will provide important insights into the differential properties of macrophage populations under various physiological and pathological conditions.
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Affiliation(s)
- Kaaweh Molawi
- Centre d'Immunologie de Marseille-Luminy, UM2 Aix-Marseille Université, Marseille cedex 9; INSERM, Marseille, France; CNRS, Marseille, France; Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
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27
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Mononuclear phagocyte miRNome analysis identifies miR-142 as critical regulator of murine dendritic cell homeostasis. Blood 2012; 121:1016-27. [PMID: 23212522 DOI: 10.1182/blood-2012-07-445999] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The mononuclear phagocyte system comprises cells as diverse as monocytes, macrophages, and dendritic cells (DCs), which collectively play key roles in innate immune responses and the triggering of adaptive immunity. Recent studies have highlighted the role of growth and transcription factors in defining developmental pathways and lineage relations within this cellular compartment. However, contributions of miRNAs to the development of mononuclear phagocytes remain largely unknown. In the present study, we report a comprehensive map of miRNA expression profiles for distinct myeloid populations, including BM-resident progenitors, monocytes, and mature splenic DCs. Each of the analyzed cell populations displayed a distinctive miRNA profile, suggesting a role for miRNAs in defining myeloid cell identities. Focusing on DC development, we found miR-142 to be highly expressed in classic FLT3-L–dependent CD4+ DCs, whereas reduced expression was observed in closely related CD8α+ or CD4- CD8α- DCs. Moreover, mice deficient for miR-142 displayed an impairment of CD4+ DC homeostasis both in vitro and in vivo. Furthermore, loss of miR-142–dependent CD4+ DCs was accompanied by a severe and specific defect in the priming of CD4+ T cells. The results of our study establish a novel role for miRNAs in myeloid cell specification and define miR-142 as a pivotal genetic component in the maintenance of CD4+ DCs.
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28
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Ortega MT, Lu N, Chapes SK. Evaluation of in vitro macrophage differentiation during space flight. ADVANCES IN SPACE RESEARCH : THE OFFICIAL JOURNAL OF THE COMMITTEE ON SPACE RESEARCH (COSPAR) 2012; 49:1441-1455. [PMID: 23420085 PMCID: PMC3570223 DOI: 10.1016/j.asr.2012.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We differentiated mouse bone marrow cells in the presence of recombinant macrophage colony stimulating (rM-CSF) factor for 14 days during the flight of space shuttle Space Transportation System (STS)-126. We tested the hypothesis that the receptor expression for M-CSF, c-Fms was reduced. We used flow cytometry to assess molecules on cells that were preserved during flight to define the differentiation state of the developing bone marrow macrophages; including CD11b, CD31, CD44, Ly6C, Ly6G, F4/80, Mac2, c-Fos as well as c-Fms. In addition, RNA was preserved during the flight and was used to perform a gene microarray. We found that there were significant differences in the number of macrophages that developed in space compared to controls maintained on Earth. We found that there were significant changes in the distribution of cells that expressed CD11b, CD31, F4/80, Mac2, Ly6C and c-Fos. However, there were no changes in c-Fms expression and no consistent pattern of advanced or retarded differentiation during space flight. We also found a pattern of transcript levels that would be consistent with a relatively normal differentiation outcome but increased proliferation by the bone marrow macrophages that were assayed after 14 days of space flight. There also was a surprising pattern of space flight influence on genes of the coagulation pathway. These data confirm that a space flight can have an impact on the in vitro development of macrophages from mouse bone marrow cells.
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Affiliation(s)
| | | | - Stephen K. Chapes
- Corresponding author. Address: 116 Ackert Hall, Kansas State University, Manhattan, KS 66506-4901, USA. Tel.: +1 785 532 6795; fax: +1 785 532 6653.
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29
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Swain SD, Meissner NN, Siemsen DW, McInnerney K, Harmsen AG. Pneumocystis elicits a STAT6-dependent, strain-specific innate immune response and airway hyperresponsiveness. Am J Respir Cell Mol Biol 2012; 46:290-8. [PMID: 21960549 PMCID: PMC3326431 DOI: 10.1165/rcmb.2011-0154oc] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Accepted: 09/08/2011] [Indexed: 11/24/2022] Open
Abstract
It is widely held that exposure to pathogens such as fungi can be an agent of comorbidity, such as exacerbation of asthma or chronic obstructive pulmonary disease. Although many studies have examined allergic responses to fungi and their effects on pulmonary function, the possible pathologic implications of the early innate responses to fungal pathogens have not been explored. We examined early responses to the atypical fungus Pneumocystis in two common strains of mice in terms of overall immunological response and related pathology, such as cell damage and airway hyperresponsiveness (AHR). We found a strong strain-specific response in BALB/c mice that included recruitment of neutrophils, NK, NKT, and CD4 T cells. This response was accompanied by elevated indicators of lung damage (bronchoalveolar lavage fluid albumin and LDH) and profound AHR. This early response was absent in C57BL/6 mice, although both strains exhibited a later response associated with the clearance of Pneumocystis. We found that this AHR could not be attributed exclusively to the presence of recruited neutrophils, NKT, NK, or CD4 cells or to the actions of IFN-γ or IL-4. However, in the absence of STAT6 signaling, AHR and inflammatory cell recruitment were virtually absent. Gene expression analysis indicated that this early response included activation of several transcription factors that could be involved in pulmonary remodeling. These results show that exposure to a fungus such as Pneumocystis can elicit pulmonary responses that may contribute to morbidity, even without prior sensitization, in the context of certain genetic backgrounds.
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MESH Headings
- Albumins/metabolism
- Animals
- Antigens, CD1/genetics
- Antigens, CD1/metabolism
- Bronchial Hyperreactivity/genetics
- Bronchial Hyperreactivity/immunology
- Bronchial Hyperreactivity/metabolism
- Bronchial Hyperreactivity/microbiology
- Bronchial Hyperreactivity/physiopathology
- Bronchoalveolar Lavage Fluid/cytology
- Bronchoalveolar Lavage Fluid/immunology
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- CD4-Positive T-Lymphocytes/microbiology
- Disease Models, Animal
- Gene Expression Regulation
- Immunity, Innate
- Interferon-gamma/deficiency
- Interferon-gamma/genetics
- Interleukin-4/metabolism
- L-Lactate Dehydrogenase/metabolism
- Lung/immunology
- Lung/metabolism
- Lung/microbiology
- Lung/physiopathology
- Lung Diseases, Fungal/genetics
- Lung Diseases, Fungal/immunology
- Lung Diseases, Fungal/metabolism
- Lung Diseases, Fungal/microbiology
- Lung Diseases, Fungal/physiopathology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, SCID
- Natural Killer T-Cells/immunology
- Natural Killer T-Cells/metabolism
- Natural Killer T-Cells/microbiology
- Neutrophils/immunology
- Neutrophils/metabolism
- Neutrophils/microbiology
- Pneumocystis Infections/genetics
- Pneumocystis Infections/immunology
- Pneumocystis Infections/metabolism
- Pneumocystis Infections/microbiology
- Pneumocystis Infections/physiopathology
- Receptors, Interleukin-4/deficiency
- Receptors, Interleukin-4/genetics
- Receptors, Interleukin-8B/deficiency
- Receptors, Interleukin-8B/genetics
- STAT6 Transcription Factor/deficiency
- STAT6 Transcription Factor/genetics
- STAT6 Transcription Factor/metabolism
- Signal Transduction
- Species Specificity
- Time Factors
- Transcriptional Activation
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Affiliation(s)
- Steve D Swain
- Department of Immunology and Infectious Diseases, Montana State University, Bozeman, MT 59717, USA.
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30
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Trikha P, Sharma N, Opavsky R, Reyes A, Pena C, Ostrowski MC, Roussel MF, Leone G. E2f1-3 are critical for myeloid development. J Biol Chem 2010; 286:4783-95. [PMID: 21115501 DOI: 10.1074/jbc.m110.182733] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Hematopoietic development involves the coordinated activity of differentiation and cell cycle regulators. In current models of mammalian cell cycle control, E2f activators (E2f1, E2f2, and E2f3) are portrayed as the ultimate transcriptional effectors that commit cells to enter and progress through S phase. Using conditional gene knock-out strategies, we show that E2f1-3 are not required for the proliferation of early myeloid progenitors. Rather, these E2fs are critical for cell survival and proliferation at two distinct steps of myeloid development. First, E2f1-3 are required as transcriptional repressors for the survival of CD11b(+) myeloid progenitors, and then they are required as activators for the proliferation of CD11b(+) macrophages. In bone marrow macrophages, we show that E2f1-3 respond to CSF1-Myc mitogenic signals and serve to activate E2f target genes and promote their proliferation. Together, these findings expose dual functions for E2f1-3 at distinct stages of myeloid development in vivo, first as repressors in cell survival and then as activators in cell proliferation. In summary, this work places E2f1-3 in a specific signaling cascade that is critical for myeloid development in vivo.
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Affiliation(s)
- Prashant Trikha
- College of Medicine and Public Health, Ohio State University, Columbus, Ohio 43210, USA
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31
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Hume DA, Summers KM, Raza S, Baillie JK, Freeman TC. Functional clustering and lineage markers: insights into cellular differentiation and gene function from large-scale microarray studies of purified primary cell populations. Genomics 2010; 95:328-38. [PMID: 20211243 DOI: 10.1016/j.ygeno.2010.03.002] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 03/01/2010] [Accepted: 03/02/2010] [Indexed: 12/24/2022]
Abstract
Very large microarray datasets showing gene expression across multiple tissues and cell populations provide a window on the transcriptional networks that underpin the differences in functional activity between biological systems. Clusters of co-expressed genes provide lineage markers, candidate regulators of cell function and, by applying the principle of guilt by association, candidate functions for genes of currently unknown function. We have analysed a dataset comprising pure cell populations from hemopoietic and non-hemopoietic cell types (http://biogps.gnf.org). Using a novel network visualisation and clustering approach, we demonstrate that it is possible to identify very tight expression signatures associated specifically with embryonic stem cells, mesenchymal cells and hematopoietic lineages. Selected examples validate the prediction that gene function can be inferred by co-expression. One expression cluster was enriched in phagocytes, which, alongside endosome-lysosome constituents, contains genes that may make up a 'pathway' for phagocyte differentiation. Promoters of these genes are enriched for binding sites for the ETS/PU.1 and MITF families. Another cluster was associated with the production of a specific extracellular matrix, with high levels of gene expression shared by cells of mesenchymal origin (fibroblasts, adipocytes, osteoblasts and myoblasts). We discuss the limitations placed upon such data by the presence of alternative promoters with distinct tissue specificity within many protein-coding genes.
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Affiliation(s)
- David A Hume
- The Roslin Institute, Roslin Biocentre, Roslin, Midlothian, UK.
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32
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Ovchinnikov DA, DeBats CEE, Sester DP, Sweet MJ, Hume DA. A conserved distal segment of the mouse CSF-1 receptor promoter is required for maximal expression of a reporter gene in macrophages and osteoclasts of transgenic mice. J Leukoc Biol 2010; 87:815-22. [DOI: 10.1189/jlb.0809557] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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33
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Garceau V, Smith J, Paton IR, Davey M, Fares MA, Sester DP, Burt DW, Hume DA. Pivotal Advance: Avian colony-stimulating factor 1 (CSF-1), interleukin-34 (IL-34), and CSF-1 receptor genes and gene products. J Leukoc Biol 2010; 87:753-64. [PMID: 20051473 DOI: 10.1189/jlb.0909624] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Macrophages are involved in many aspects of development, host defense, pathology, and homeostasis. Their normal differentiation, proliferation, and survival are controlled by CSF-1 via the activation of the CSF1R. A recently discovered cytokine, IL-34, was shown to bind the same receptor in humans. Chicken is a widely used model organism in developmental biology, but the factors that control avian myelopoiesis have not been identified previously. The CSF-1, IL-34, and CSF1R genes in chicken and zebra finch were identified from respective genomic/cDNA sequence resources. Comparative analysis of the avian CSF1R loci revealed likely orthologs of mammalian macrophage-specific promoters and enhancers, and the CSF1R gene is expressed in the developing chick embryo in a pattern consistent with macrophage-specific expression. Chicken CSF-1 and IL-34 were expressed in HEK293 cells and shown to elicit macrophage growth from chicken BM cells in culture. Comparative sequence and co-evolution analysis across all vertebrates suggests that the two ligands interact with distinct regions of the CSF1R. These studies demonstrate that there are two separate ligands for a functional CSF1R across all vertebrates.
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Affiliation(s)
- Valerie Garceau
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, United Kingdom
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34
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Lattin JE, Greenwood KP, Daly NL, Kelly G, Zidar DA, Clark RJ, Thomas WG, Kellie S, Craik DJ, Hume DA, Sweet MJ. Beta-arrestin 2 is required for complement C1q expression in macrophages and constrains factor-independent survival. Mol Immunol 2009; 47:340-7. [PMID: 19783052 DOI: 10.1016/j.molimm.2009.09.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 09/03/2009] [Accepted: 09/03/2009] [Indexed: 12/22/2022]
Abstract
The beta-arrestins (ARRB1 and ARRB2) regulate G-protein coupled receptor (GPCR) dependent- and independent-signaling pathways and are ubiquitously expressed. Here we show that ARRB2 mRNA and protein expression is enriched in macrophages, and that it regulates complement C1q expression and cell survival. Basal and Toll-like receptor (TLR) inducible expression of mRNAs encoding the complement subcomponents C1qa, C1qb and C1qc was greatly reduced in bone marrow-derived macrophages (BMM) from ARRB2-deficient, but not ARRB1-deficient mice, while factor-independent survival of ARRB2(-/-) BMM was enhanced compared to wildtype BMM. TatARRB2(23), a cell-permeable peptide that contains the MAPK JNK-binding motif from within the ARRB2 C-domain, impaired ARRB2 interaction with JNK3, down-regulated C1q expression and permitted factor-independent survival in BMM, thus suggesting that this peptide antagonises ARRB2 function in macrophages. In addition, TatARRB2(23) transiently activated the phosphorylation of JNK and ERK, but not p38 in BMM. These data imply that ARRB2 acts to limit JNK/ERK activation and survival in macrophages, but is required for basal and TLR-inducible complement C1q expression. Given that loss of C1q function is strongly associated with the development of systemic lupus erythematosus, ARRB2 may act to limit the development of autoimmune disease.
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Affiliation(s)
- Jane E Lattin
- The University of Queensland, Institute for Molecular Bioscience, QLD 4072, Australia
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35
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CARD9 facilitates microbe-elicited production of reactive oxygen species by regulating the LyGDI-Rac1 complex. Nat Immunol 2009; 10:1208-14. [PMID: 19767757 DOI: 10.1038/ni.1788] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Accepted: 07/31/2009] [Indexed: 12/15/2022]
Abstract
In response to invading microorganisms, macrophages engage in phagocytosis and rapidly release reactive oxygen species (ROS), which serve an important microbicidal function. However, how phagocytosis induces ROS production remains largely unknown. CARD9, a caspase-recruitment domain (CARD)-containing protein, is important for resistance to fungal and bacterial infection. The mechanism of CARD9-mediated bacterial clearance is still mostly unknown. Here we show that CARD9 is required for killing intracellular bacteria in macrophages. CARD9 associated with the GDP-dissociation inhibitor LyGDI in phagosomes after bacterial and fungal infection and binding of CARD9 suppressed LyGDI-mediated inhibition of the GTPase Rac1, thereby leading to ROS production and bacterial killing in macrophages. Thus, our studies identify a key pathway that leads to microbe-elicited ROS production.
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36
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Barton JL, Bunka DHJ, Knowling SE, Lefevre P, Warren AJ, Bonifer C, Stockley PG. Characterization of RNA aptamers that disrupt the RUNX1-CBFbeta/DNA complex. Nucleic Acids Res 2009; 37:6818-30. [PMID: 19740763 PMCID: PMC2777437 DOI: 10.1093/nar/gkp728] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The transcription factor RUNX1 (AML1) is an important regulator of haematopoiesis, and an important fusion partner in leukaemic translocations. High-affinity DNA binding by RUNX1 requires the interaction of the RUNX1 Runt-Homology-Domain (RHD) with the core-binding factor β protein (CBFβ). To generate novel reagents for in vitro and in vivo studies of RUNX1 function, we have selected high-affinity RNA aptamers against a recombinant RHD–CBFβ complex. Selection yielded two sequence families, each dominated by a single consensus sequence. Aptamers from each family disrupt DNA binding by the RUNX1 protein in vitro and compete with sequence-specific dsDNA binding. Minimal, high-affinity (∼100–160 nM) active aptamer fragments 28 and 30 nts in length, consisting of simple short stem-loop structures, were then identified. These bind to the RHD subunit and disrupt its interaction with CBFβ, which is consistent with reduced DNA affinity in the presence of aptamer. These aptamers represent new reagents that target a novel surface on the RHD required to stabilize the recombinant RHD–CBFβ complex and thus will further aid exploring the functions of this key transcription factor.
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Affiliation(s)
- Jenny L Barton
- Section of Experimental Haematology, Leeds Institute of Molecular Medicine, St James's University Hospital, Leeds LS9 7TF, UK
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37
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Early chromatin unfolding by RUNX1: a molecular explanation for differential requirements during specification versus maintenance of the hematopoietic gene expression program. Blood 2009; 114:299-309. [PMID: 19339695 DOI: 10.1182/blood-2008-11-191890] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
At the cellular level, development progresses through successive regulatory states, each characterized by their specific gene expression profile. However, the molecular mechanisms regulating first the priming and then maintenance of gene expression within one developmental pathway are essentially unknown. The hematopoietic system represents a powerful experimental model to address these questions and here we have focused on a regulatory circuit playing a central role in myelopoiesis: the transcription factor PU.1, its target gene colony-stimulating-factor 1 receptor (Csf1r), and key upstream regulators such as RUNX1. We find that during ontogeny, chromatin unfolding precedes the establishment of active histone marks and the formation of stable transcription factor complexes at the Pu.1 locus and we show that chromatin remodeling is mediated by the transient binding of RUNX1 to Pu.1 cis-elements. By contrast, chromatin reorganization of Csf1r requires prior expression of PU.1 together with RUNX1 binding. Once the full hematopoietic program is established, stable transcription factor complexes and active chromatin can be maintained without RUNX1. Our experiments therefore demonstrate how individual transcription factors function in a differentiation stage-specific manner to differentially affect the initiation versus maintenance of a developmental program.
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38
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Rajaraman G, Murthi P, Leo B, Brennecke SP, Kalionis B. Homeobox gene HLX1 is a regulator of colony stimulating factor-1 dependent trophoblast cell proliferation. Placenta 2007; 28:991-8. [PMID: 17532041 DOI: 10.1016/j.placenta.2007.03.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Revised: 03/23/2007] [Accepted: 03/30/2007] [Indexed: 11/18/2022]
Abstract
The cytokine colony stimulating factor-1 (CSF-1) is a key regulator of the proliferation, differentiation and activation of mononuclear phagocytes. CSF-1 also plays an important role in reproduction. CSF-1 is produced in the placenta and activates signal transduction pathways that significantly increase the proliferation of placental trophoblast cells in culture. The target genes activated by CSF-1 mediated signal transduction in the nucleus are not well understood. Here, we use placental trophoblast cells to investigate potential downstream effector genes of CSF-1. HLX1 is a homeobox gene that controls proliferation in embryonic cell types and haematopoietic cell lineages. We have shown HLX1 is expressed in placental trophoblast cells but its functional role in the placenta is unknown. Following CSF-1 stimulation, HLX1 mRNA expression was significantly increased in SGHPL-4 and HTR-8/SVNeo cultured trophoblast cells (p<0.001, n=3). siRNA-mediated reduction of HLX1 mRNA levels with four independent oligonucleotides (siRNAs) resulted in significantly decreased cell proliferation in both cell lines (p<0.001, n=4). When HLX1 mRNA levels were reduced in the presence of CSF-1 stimulation, proliferation remained significantly decreased (p<0.001, n=4) in both the cell lines. We have shown for the first time that a homeobox gene, HLX1, is a downstream effector gene of CSF-1, that HLX1 regulates placental cell proliferation and that CSF-1 acts, at least in part, through HLX1 to control cell proliferation.
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Affiliation(s)
- G Rajaraman
- Department of Obstetrics and Gynaecology, University of Melbourne, Australia
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39
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Nilsson R, Bajic VB, Suzuki H, di Bernardo D, Björkegren J, Katayama S, Reid JF, Sweet MJ, Gariboldi M, Carninci P, Hayashizaki Y, Hume DA, Tegner J, Ravasi T. Transcriptional network dynamics in macrophage activation. Genomics 2006; 88:133-42. [PMID: 16698233 DOI: 10.1016/j.ygeno.2006.03.022] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2005] [Revised: 03/09/2006] [Accepted: 03/25/2006] [Indexed: 11/28/2022]
Abstract
Transcriptional regulatory networks govern cell differentiation and the cellular response to external stimuli. However, mammalian model systems have not yet been accessible for network analysis. Here, we present a genome-wide network analysis of the transcriptional regulation underlying the mouse macrophage response to bacterial lipopolysaccharide (LPS). Key to uncovering the network structure is our combination of time-series cap analysis of gene expression with in silico prediction of transcription factor binding sites. By integrating microarray and qPCR time-series expression data with a promoter analysis, we find dynamic subnetworks that describe how signaling pathways change dynamically during the progress of the macrophage LPS response, thus defining regulatory modules characteristic of the inflammatory response. In particular, our integrative analysis enabled us to suggest novel roles for the transcription factors ATF-3 and NRF-2 during the inflammatory response. We believe that our system approach presented here is applicable to understanding cellular differentiation in higher eukaryotes.
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Affiliation(s)
- Roland Nilsson
- Center for Genomics and Bioinformatics, Karolinska Institutet, Stockholm, Sweden
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