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Bee GCW, Lokken-Toyli KL, Yeung ST, Rodriguez L, Zangari T, Anderson EE, Ghosh S, Rothlin CV, Brodin P, Khanna KM, Weiser JN. Age-dependent differences in efferocytosis determine the outcome of opsonophagocytic protection from invasive pathogens. Immunity 2023; 56:1255-1268.e5. [PMID: 37059107 PMCID: PMC10330046 DOI: 10.1016/j.immuni.2023.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/22/2022] [Accepted: 03/21/2023] [Indexed: 04/16/2023]
Abstract
In early life, susceptibility to invasive infection skews toward a small subset of microbes, whereas other pathogens associated with diseases later in life, including Streptococcus pneumoniae (Spn), are uncommon among neonates. To delineate mechanisms behind age-dependent susceptibility, we compared age-specific mouse models of invasive Spn infection. We show enhanced CD11b-dependent opsonophagocytosis by neonatal neutrophils improved protection against Spn during early life. The augmented function of neonatal neutrophils was mediated by higher CD11b surface expression at the population level due to dampened efferocytosis, which also resulted in more CD11bhi "aged" neutrophils in peripheral blood. Dampened efferocytosis during early life could be attributed to the lack of CD169+ macrophages in neonates and reduced systemic expressions of multiple efferocytic mediators, including MerTK. On experimentally impairing efferocytosis later in life, CD11bhi neutrophils increased and protection against Spn improved. Our findings reveal how age-dependent differences in efferocytosis determine infection outcome through the modulation of CD11b-driven opsonophagocytosis and immunity.
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Affiliation(s)
- Gavyn Chern Wei Bee
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA.
| | - Kristen L Lokken-Toyli
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA
| | - Stephen T Yeung
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA
| | - Lucie Rodriguez
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Tonia Zangari
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA
| | - Exene E Anderson
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA
| | - Sourav Ghosh
- Department of Pharmacology, Yale School of Medicine, New Haven, CT, USA; Department of Neurology, Yale School of Medicine, New Haven, CT, USA
| | - Carla V Rothlin
- Department of Pharmacology, Yale School of Medicine, New Haven, CT, USA; Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Petter Brodin
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Department of Immunology & Inflammation, Imperial College London, London, UK
| | - Kamal M Khanna
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA; Laura & Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY, USA
| | - Jeffrey N Weiser
- Department of Microbiology, New York University Grossman School of Medicine, New York, USA.
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Ma J, Mahmud N, Bosland MC, Ross SR. DDX41 is needed for pre- and postnatal hematopoietic stem cell differentiation in mice. Stem Cell Reports 2022; 17:879-893. [PMID: 35303436 PMCID: PMC9023775 DOI: 10.1016/j.stemcr.2022.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 12/13/2022] Open
Abstract
DDX41 is a tumor suppressor frequently mutated in human myeloid neoplasms, but whether it affects hematopoiesis is unknown. Using a knockout mouse, we demonstrate that DDX41 is required for mouse hematopoietic stem and progenitor cell (HSPC) survival and differentiation, particularly of myeloid lineage cells. Transplantation of Ddx41 knockout fetal liver and adult bone marrow (BM) cells was unable to rescue mice from lethal irradiation, and knockout stem cells were also defective in colony formation assays. RNA-seq analysis of Lin-/cKit+/Sca1+Ddx41 knockout cells from fetal liver demonstrated that the expression of many genes associated with hematopoietic differentiation were altered. Furthermore, differential splicing of genes involved in key biological processes was observed. Our data reveal a critical role for DDX41 in HSPC differentiation and myeloid progenitor development, likely through regulating gene expression programs and splicing.
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Affiliation(s)
- Jing Ma
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, 835 South Wolcott Avenue, E705 MSB (MC 790), Chicago, IL 60612, USA
| | - Nadim Mahmud
- Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Maarten C Bosland
- Department of Pathology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Susan R Ross
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, 835 South Wolcott Avenue, E705 MSB (MC 790), Chicago, IL 60612, USA.
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Abstract
PURPOSE OF REVIEW Myeloid cells contribute to immune response to infection and tissue regeneration after injury as well as to the developmental induction of the hematopoietic system overall. Here we review recent uses of zebrafish to advance the study of myeloid biology in development and disease. RECENT FINDINGS Recent studies have made use of advanced imaging and genetic strategies and have highlighted key concepts in myeloid cell behavior. These include immune-cell cross-talk and subpopulation response in infection and regeneration, and tightly regulated inflammatory and tissue remodeling behaviors in development. SUMMARY These new findings will shape our understanding of the developmental origins of immune populations as well as their specific cellular behaviors at all stages of infection, regeneration, and myeloid neoplasms.
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Affiliation(s)
- Samuel J. Wattrus
- Stem Cell Program and Division of Hematology/Oncology, Boston Children’s Hospital and Dana Farber Cancer Institute, Howard Hughes Medical Institute, Harvard Medical School, Harvard Stem Cell Institute, Stem Cell and Regenerative Biology Department, Harvard University, Boston, MA, USA
| | - Leonard I. Zon
- Stem Cell Program and Division of Hematology/Oncology, Boston Children’s Hospital and Dana Farber Cancer Institute, Howard Hughes Medical Institute, Harvard Medical School, Harvard Stem Cell Institute, Stem Cell and Regenerative Biology Department, Harvard University, Boston, MA, USA
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Saha S, Murmu KC, Biswas M, Chakraborty S, Basu J, Madhulika S, Kolapalli SP, Chauhan S, Sengupta A, Prasad P. Transcriptomic Analysis Identifies RNA Binding Proteins as Putative Regulators of Myelopoiesis and Leukemia. Front Oncol 2019; 9:692. [PMID: 31448224 PMCID: PMC6691814 DOI: 10.3389/fonc.2019.00692] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/12/2019] [Indexed: 12/26/2022] Open
Abstract
Acute myeloid leukemia (AML) is a common and aggressive hematological malignancy. Acquisition of heterogeneous genetic aberrations and epigenetic dysregulation lead to the transformation of hematopoietic stem cells (HSC) into leukemic stem cells (LSC), which subsequently gives rise to immature blast cells and a leukemic phenotype. LSCs are responsible for disease relapse as current chemotherapeutic regimens are not able to completely eradicate these cellular sub-populations. Therefore, it is critical to improve upon the existing knowledge of LSC specific markers, which would allow for specific targeting of these cells more effectively allowing for their sustained eradication from the cellular milieu. Although significant milestones in decoding the aberrant transcriptional network of various cancers, including leukemia, have been achieved, studies on the involvement of post-transcriptional gene regulation (PTGR) in disease progression are beginning to unfold. RNA binding proteins (RBPs) are key players in mediating PTGR and they regulate the intracellular fate of individual transcripts, from their biogenesis to RNA metabolism, via interactions with RNA binding domains (RBDs). In this study, we have used an integrative approach to systematically profile RBP expression and identify key regulatory RBPs involved in normal myeloid development and AML. We have analyzed RNA-seq datasets (GSE74246) of HSCs, common myeloid progenitors (CMPs), granulocyte-macrophage progenitors (GMPs), monocytes, LSCs, and blasts. We observed that normal and leukemic cells can be distinguished on the basis of RBP expression, which is indicative of their ability to define cellular identity, similar to transcription factors. We identified that distinctly co-expressing modules of RBPs and their subclasses were enriched in hematopoietic stem/progenitor (HSPCs) and differentiated monocytes. We detected expression of DZIP3, an E3 ubiquitin ligase, in HSPCs, knockdown of which promotes monocytic differentiation in cell line model. We identified co-expression modules of RBP genes in LSCs and among these, distinct modules of RBP genes with high and low expression. The expression of several AML-specific RBPs were also validated by quantitative polymerase chain reaction. Network analysis identified densely connected hubs of ribosomal RBP genes (rRBPs) with low expression in LSCs, suggesting the dependency of LSCs on altered ribosome dynamics. In conclusion, our systematic analysis elucidates the RBP transcriptomic landscape in normal and malignant myelopoiesis, and highlights the functional consequences that may result from perturbation of RBP gene expression in these cellular landscapes.
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Affiliation(s)
- Subha Saha
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
| | - Krushna Chandra Murmu
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
| | - Mayukh Biswas
- Translational Research Unit of Excellence (TRUE), Stem Cell and Leukemia Laboratory, Council of Scientific and Industrial Research (CSIR)-Indian Institute of Chemical Biology (IICB), Kolkata, India
| | - Sohini Chakraborty
- Department of Pathology, New York University School of Medicine, New York, NY, United States
| | - Jhinuk Basu
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
| | - Swati Madhulika
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
| | | | - Santosh Chauhan
- Cell Biology and Infectious Disease Unit, Institute of Life Sciences, Bhubaneswar, India
| | - Amitava Sengupta
- Translational Research Unit of Excellence (TRUE), Stem Cell and Leukemia Laboratory, Council of Scientific and Industrial Research (CSIR)-Indian Institute of Chemical Biology (IICB), Kolkata, India
| | - Punit Prasad
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
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Hu N, Qiu Y, Dong F. Role of Erk1/2 signaling in the regulation of neutrophil versus monocyte development in response to G-CSF and M-CSF. J Biol Chem 2015; 290:24561-73. [PMID: 26296889 DOI: 10.1074/jbc.m115.668871] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Indexed: 01/11/2023] Open
Abstract
Lineage specification in the hematopoietic system depends on the expression of lineage specific transcription factors. However, the role of hematopoietic cytokines in this process has been controversial and little is known about the intracellular signaling mechanisms by which cytokines instruct lineage choice. G-CSF and M-CSF are two lineage-specific cytokines that play a dominant role in granulopoiesis and monopoiesis, respectively. We show here that a G-CSFR mutant in which tyrosine 729 had been mutated to phenylalanine (Y729F) promoted monocyte rather than neutrophil development in myeloid precursors, which was associated with prolonged activation of Erk1/2 and augmented activation of downstream targets c-Fos and Egr1. Inhibition of Erk1/2 activation or knockdown of c-Fos or Egr1 largely rescued neutrophil development in cells expressing G-CSFR Y729F. We also show that M-CSF, but not G-CSF, stimulated strong and sustained activation of Erk1/2 in mouse lineage marker negative (Lin(-)) bone marrow cells. Significantly, inhibition of Erk1/2 signaling in these cells favored neutrophil over monocyte development in response to M-CSF. Thus, prolonged Erk1/2 activation resulted in monocyte development following G-CSF induction whereas inhibition of Erk1/2 signaling promoted neutrophil development at the expense of monocyte formation in response to M-CSF. These results reveal an important mechanism by which G-CSF and M-CSF instruct neutrophil versus monocyte lineage choice, i.e. differential activation of Erk1/2 pathway.
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Affiliation(s)
- Nan Hu
- From the Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Yaling Qiu
- From the Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Fan Dong
- From the Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
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