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Koster EAS, von dem Borne PA, van Balen P, Marijt EWA, Tjon JML, Snijders TJF, van Lammeren D, Veelken H, Falkenburg JHF, Halkes CJM, de Wreede LC. Risk factors for graft-versus-host-disease after donor lymphocyte infusion following T-cell depleted allogeneic stem cell transplantation. Front Immunol 2024; 15:1335341. [PMID: 38545096 PMCID: PMC10966113 DOI: 10.3389/fimmu.2024.1335341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 02/13/2024] [Indexed: 04/10/2024] Open
Abstract
Introduction Unmodified donor lymphocyte infusions (DLI) after allogeneic stem cell transplantation (alloSCT) can boost the beneficial Graft-versus-Leukemia (GvL) effect but may also induce severe Graft-versus-Host-Disease (GvHD). To improve the balance between GvL and GvHD, it is crucial to identify factors that influence the alloreactivity of DLI. Methods We investigated the effects of the presence of patient-derived antigen-presenting cells at time of DLI as estimated by the bone marrow (BM) chimerism status, lymphopenia as measured by the absolute lymphocyte count (ALC) at time of DLI, and the presence of a viral infection (de novo or reactivation) close to DLI on the risk of GvHD after DLI. The cohort consisted of patients with acute leukemia or myelodysplastic syndrome who prophylactically or pre-emptively received DLI as standard care after alemtuzumab-based alloSCT. In patients at high risk for relapse, DLI was administered at 3 months after alloSCT (n=88) with a dose of 0.3x106 or 0.15x106 T cells/kg in case of a related or unrelated donor, respectively. All other patients (n=76) received 3x106 or 1.5x106 T cells/kg, respectively, at 6 months after alloSCT. Results For both DLIs, patients with reduced-intensity conditioning and an unrelated donor had the highest risk of GvHD. For DLI given at three months, viral infection within 1 week before and 2 weeks after DLI was an additional significant risk factor (hazard ratio (HR) 3.66 compared to no viral infection) for GvHD. At six months after alloSCT, viral infections were rare and not associated with GvHD. In contrast, mixed BM chimerism (HR 3.63 for ≥5% mixed chimerism compared to full donor) was an important risk factor for GvHD after DLI given at six months after alloSCT. ALC of <1000x106/l showed a trend for association with GvHD after this DLI (HR 2.05 compared to ≥1000x106/l, 95% confidence interval 0.94-4.45). Furthermore, the data suggested that the presence of a viral infection close to the DLI at three months or ≥5% mixed chimerism at time of the DLI at six months correlated with the severity of GvHD, thereby increasing their negative impact on the current GvHD-relapse-free survival. Conclusion These data demonstrate that the risk factors for GvHD after DLI depend on the setting of the DLI.
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Affiliation(s)
- Eva A S Koster
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | | | - Peter van Balen
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | - Erik W A Marijt
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | - Jennifer M L Tjon
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | | | | | - Hendrik Veelken
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | | | | | - Liesbeth C de Wreede
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands
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2
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Cao M, Wang Z, Lan W, Xiang B, Liao W, Zhou J, Liu X, Wang Y, Zhang S, Lu S, Lang J, Zhao Y. The roles of tissue resident macrophages in health and cancer. Exp Hematol Oncol 2024; 13:3. [PMID: 38229178 PMCID: PMC10790434 DOI: 10.1186/s40164-023-00469-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 12/28/2023] [Indexed: 01/18/2024] Open
Abstract
As integral components of the immune microenvironment, tissue resident macrophages (TRMs) represent a self-renewing and long-lived cell population that plays crucial roles in maintaining homeostasis, promoting tissue remodeling after damage, defending against inflammation and even orchestrating cancer progression. However, the exact functions and roles of TRMs in cancer are not yet well understood. TRMs exhibit either pro-tumorigenic or anti-tumorigenic effects by engaging in phagocytosis and secreting diverse cytokines, chemokines, and growth factors to modulate the adaptive immune system. The life-span, turnover kinetics and monocyte replenishment of TRMs vary among different organs, adding to the complexity and controversial findings in TRMs studies. Considering the complexity of tissue associated macrophage origin, macrophages targeting strategy of each ontogeny should be carefully evaluated. Consequently, acquiring a comprehensive understanding of TRMs' origin, function, homeostasis, characteristics, and their roles in cancer for each specific organ holds significant research value. In this review, we aim to provide an outline of homeostasis and characteristics of resident macrophages in the lung, liver, brain, skin and intestinal, as well as their roles in modulating primary and metastatic cancer, which may inform and serve the future design of targeted therapies.
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Affiliation(s)
- Minmin Cao
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zihao Wang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Wanying Lan
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
- Guixi Community Health Center of the Chengdu High-Tech Zone, Chengdu, China
| | - Binghua Xiang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Wenjun Liao
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Jie Zhou
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Xiaomeng Liu
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Yiling Wang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Shichuan Zhang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Shun Lu
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Jinyi Lang
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Yue Zhao
- Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China.
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3
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Pang J, Koh TJ. Proliferation of monocytes and macrophages in homeostasis, infection, injury, and disease. J Leukoc Biol 2023; 114:532-546. [PMID: 37555460 PMCID: PMC10673715 DOI: 10.1093/jleuko/qiad093] [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: 05/16/2023] [Revised: 06/30/2023] [Accepted: 07/31/2023] [Indexed: 08/10/2023] Open
Abstract
Monocytes (Mo) and macrophages (Mφ) play important roles in the function of tissues, organs, and systems of all animals during homeostasis, infection, injury, and disease. For decades, conventional wisdom has dictated that Mo and Mφ are end-stage cells that do not proliferate and that Mφ accumulation in tissues is the result of infiltration of Mo from the blood and subsequent differentiation to Mφ. However, reports from the early 1900s to the present describe evidence of Mo and Mφ proliferation in different tissues and contexts. The purpose of this review is to summarize both historical and current evidence for the contribution of Mφ proliferation to their accumulation in different tissues during homeostasis, infection, injury, and disease. Mφ proliferate in different organs and tissues, including skin, peritoneum, lung, heart, aorta, kidney, liver, pancreas, brain, spinal cord, eye, adipose tissue, and uterus, and in different species including mouse, rat, rabbit, and human. Mφ can proliferate at different stages of differentiation with infiltrating Mo-like cells proliferating in certain inflammatory contexts (e.g. skin wounding, kidney injury, bladder and liver infection) and mature resident Mφ proliferating in other inflammatory contexts (e.g. nematode infection, acetaminophen liver injury) and during homeostasis. The pathways involved in stimulating Mφ proliferation also may be context dependent, with different cytokines and transcription factors implicated in different studies. Although Mφ are known to proliferate in health, injury, and disease, much remains to be learned about the regulation of Mφ proliferation in different contexts and its impact on the homeostasis, injury, and repair of different organs and tissues.
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Affiliation(s)
- Jingbo Pang
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Chicago, IL 60612-7246, United States
| | - Timothy J Koh
- Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 West Taylor Street, Chicago, IL 60612-7246, United States
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Ash S, Askenasy N. Immunotherapy for neuroblastoma by hematopoietic cell transplantation and post-transplant immunomodulation. Crit Rev Oncol Hematol 2023; 185:103956. [PMID: 36893946 DOI: 10.1016/j.critrevonc.2023.103956] [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: 06/04/2021] [Revised: 12/14/2022] [Accepted: 03/04/2023] [Indexed: 03/09/2023] Open
Abstract
Neuroblastoma represents a relatively common childhood tumor that imposes therapeutic difficulties. High risk neuroblastoma patients have poor prognosis, display limited response to radiochemotherapy and may be treated by hematopoietic cell transplantation. Allogeneic and haploidentical transplants have the distinct advantage of reinstitution of immune surveillance, reinforced by antigenic barriers. The key factors favorable to ignition of potent anti-tumor reactions are transition to adaptive immunity, recovery from lymphopenia and removal of inhibitory signals that inactivate immune cells at the local and systemic levels. Post-transplant immunomodulation may further foster anti-tumor reactivity, with positive but transient impact of infusions of lymphocytes and natural killer cells both from the donor, the recipient or third party. The most promising approaches include introduction of antigen-presenting cells in early post-transplant stages and neutralization of inhibitory signals. Further studies will likely shed light on the nature and actions of suppressor factors within tumor stroma and at the systemic level.
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Affiliation(s)
- Shifra Ash
- Department of Pediatric Hematology-Oncology, Rambam Medical Center, Haifa, Israel; Frankel Laboratory of Bone Marrow Transplantation, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.
| | - Nadir Askenasy
- Frankel Laboratory of Bone Marrow Transplantation, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
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5
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von Máriássy D, Reibke R, Verbeek M, Gätjens B, Schiller R, Anslinger K. STR typing of skin swabs from individuals after an allogeneic hematopoietic stem cell transplantation. Int J Legal Med 2023; 137:227-236. [PMID: 35657433 PMCID: PMC9816181 DOI: 10.1007/s00414-022-02847-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 05/27/2022] [Indexed: 01/11/2023]
Abstract
One of the pre-requisites for forensic DNA analysis is the fact that all nucleated cells of a person carry the same genetic information. However, this is not the case for individuals who have received an allogeneic hematopoietic stem cell or bone marrow transplantation, as all new cells formed by the bone marrow no longer show the genetic information of the recipient but that of the donor, while all other cells still carry the original information before transplantation. Thus, STR typing of a blood sample after successful transplantation yields a DNA profile that differs from the recipient's original profile and corresponds to the donor genotype instead. Evidence from a routine case suggests that transplanted individuals may show donor alleles in skin swabs, as well. In order to examine this issue more closely, various skin swabs from 28 patients who have received an allogeneic hematopoietic stem cell transplantation were examined in this study. Swabs from the right and left palm, the back of the hand, one of the two upper arms, and the neck were collected from each person. Ninety-one of the 140 resulting swabs delivered useful results. All of those samples showed mixtures of recipient and donor DNA with different mixture ratios and the proportions of donor and recipient alleles revealed inter- and intra-individual differences. Those results were discussed with respect to graft versus host disease.
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Affiliation(s)
- Dagmar von Máriássy
- Institute of Legal Medicine, Ludwig-Maximilians-University, Nußbaumstr. 26, 80336, Munich, Germany.
| | - Roland Reibke
- Department of Internal Medicine I, Klinikum Bad Trissl, Oberaudorf, Germany
| | - Mareike Verbeek
- Department of Internal Medicine III, Klinikum Rechts Der Isar, Technische Universität München, Munich, Germany
| | - Britta Gätjens
- Institute of Legal Medicine, Ludwig-Maximilians-University, Nußbaumstr. 26, 80336, Munich, Germany
| | - Roberta Schiller
- Institute of Legal Medicine, Ludwig-Maximilians-University, Nußbaumstr. 26, 80336, Munich, Germany
| | - Katja Anslinger
- Institute of Legal Medicine, Ludwig-Maximilians-University, Nußbaumstr. 26, 80336, Munich, Germany
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6
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West HC, Davies J, Henderson S, Adegun OK, Ward S, Ferrer IR, Tye CA, Vallejo AF, Jardine L, Collin M, Polak ME, Bennett CL. Loss of T cell tolerance in the skin following immunopathology is linked to failed restoration of the dermal niche by recruited macrophages. Cell Rep 2022; 39:110819. [PMID: 35584681 DOI: 10.1016/j.celrep.2022.110819] [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: 07/14/2021] [Revised: 03/17/2022] [Accepted: 04/22/2022] [Indexed: 11/03/2022] Open
Abstract
T cell pathology in the skin leads to monocyte influx, but we have little understanding of the fate of recruited cells within the diseased niche, or the long-term impact on cutaneous immune homeostasis. By combining a murine model of acute graft-versus-host disease (aGVHD) with analysis of patient samples, we demonstrate that pathology initiates dermis-specific macrophage differentiation and show that aGVHD-primed macrophages continue to dominate the dermal compartment at the relative expense of quiescent MHCIIint cells. Exposure of the altered dermal niche to topical haptens after disease resolution results in hyper-activation of regulatory T cells (Treg), but local breakdown in tolerance. Disease-imprinted macrophages express increased IL-1β and are predicted to elicit altered TNF superfamily interactions with cutaneous Treg, and we demonstrate the direct loss of T cell regulation within the resolved skin. Thus, T cell pathology leaves an immunological scar in the skin marked by failure to re-set immune homeostasis.
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Affiliation(s)
- Heather C West
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK
| | - James Davies
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK
| | - Stephen Henderson
- Bill Lyons Informatics Centre, Cancer Institute, University College London, London WC1E 6DD, UK
| | - Oluyori K Adegun
- Department of Cellular Pathology, University College London Hospitals NHS Foundation Trust, London, UK
| | - Sophie Ward
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK
| | - Ivana R Ferrer
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK
| | - Chanidapa A Tye
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK
| | - Andres F Vallejo
- Clinical and Experimental Sciences (Sir Henry Wellcome Laboratories, Faculty of Medicine) and Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Laura Jardine
- Biosciences Institute, Newcastle University, Newcastle Upon Tyne, UK
| | - Matthew Collin
- Newcastle University Translational and Clinical Research Institute and NIHR Newcastle Biomedical Research Centre, Newcastle University, Newcastle Upon Tyne, UK
| | - Marta E Polak
- Clinical and Experimental Sciences (Sir Henry Wellcome Laboratories, Faculty of Medicine) and Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Clare L Bennett
- Department of Haematology, University College London (UCL) Cancer Institute, London WC1E 6DD, UK; Institute for Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK.
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7
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Wegner J, Weidenthaler-Barth B, Engelbert J, Knothe M, Braun C, Helbig D, Sacher C, Kreft A, Wagner EM, Ziemer M, Meyer RG, von Stebut E. Immunohistochemical markers for histopathological diagnosis and differentiation of acute cutaneous graft-versus-host disease. Exp Dermatol 2021; 30:1814-1819. [PMID: 34223669 DOI: 10.1111/exd.14416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/30/2021] [Accepted: 06/07/2021] [Indexed: 11/29/2022]
Abstract
Graft-versus-host disease (GvHD) is a major complication following stem-cell or solid-organ transplantation. Accurate diagnosis of cutaneous GvHD is challenging, given that drug eruptions and viral rashes may present with similar clinical/histological manifestations. Specific markers are not available. We performed the histological examination of biopsy samples from acute GvHD (aGvHD; n = 54), Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN; n = 27), maculopapular drug eruption (MDE; n = 26) and healthy controls (n = 26). Samples of aGvHD showed a decrease in Langerhans cells (LC, p = 0.0001) and an increase in macrophages (MΦ, p = 0.0001) compared to healthy skin. Compared to SJS/TEN, MDE and healthy skin, aGvHD biopsies contained greater numbers of CD4+ and CD8+ T cells. The majority of CD4+ T-helper cells were localized in the upper dermis, whereas cytotoxic CD8+ T cells were found in the epidermis. Increased numbers of CD56+ natural killer (NK) cells in the upper dermis of aGvHD skin (p = 0.007) were not observed in controls or SJS/TEN and MDE. There were no differences in elafin staining between aGvHD and the latter two conditions. Acute GvHD appears to have a distinct inflammatory cell profile (T cells/NK cells) that may aid establishing in a more accurate diagnosis, especially when used to rule out differential diagnoses such as SJS/TEN or MDE.
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Affiliation(s)
- Joanna Wegner
- Department of Dermatology, University Medical Center Mainz, Mainz, Germany
| | | | - Julia Engelbert
- Department of Dermatology, University Medical Center Mainz, Mainz, Germany
| | - Max Knothe
- Department of Dermatology, University Hospital of Leipzig, Leipzig, Germany
| | - Claudia Braun
- Department of Dermatology, University Medical Center Mainz, Mainz, Germany
| | - Doris Helbig
- Department of Dermatology, University Hospital Cologne and Faculty of Medicine Cologne, University of Cologne, Cologne, Germany
| | - Christopher Sacher
- Department of Dermatology, University Hospital Cologne and Faculty of Medicine Cologne, University of Cologne, Cologne, Germany
| | - Andreas Kreft
- Department of Pathology, University Medical Center Mainz, Mainz, Germany
| | - Eva M Wagner
- Department of Internal Medicine III, University Medical Center Mainz, Mainz, Germany
| | - Mirjana Ziemer
- Department of Dermatology, University Hospital of Leipzig, Leipzig, Germany
| | - Ralf G Meyer
- Department of Internal Medicine III, University Medical Center Mainz, Mainz, Germany
| | - Esther von Stebut
- Department of Dermatology, University Hospital Cologne and Faculty of Medicine Cologne, University of Cologne, Cologne, Germany
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Patel AA, Ginhoux F, Yona S. Monocytes, macrophages, dendritic cells and neutrophils: an update on lifespan kinetics in health and disease. Immunology 2021; 163:250-261. [PMID: 33555612 DOI: 10.1111/imm.13320] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/13/2021] [Accepted: 01/17/2021] [Indexed: 12/16/2022] Open
Abstract
Phagocytes form a family of immune cells that play a crucial role in tissue maintenance and help orchestrate the immune response. This family of cells can be separated by their nuclear morphology into mononuclear and polymorphonuclear phagocytes. The generation of these cells in the bone marrow, to the blood and finally into tissues is a tightly regulated process. Ensuring the adequate production of these cells and their timely removal is key for both the initiation and resolution of inflammation. Insight into the kinetic profiles of innate myeloid cells during steady state and pathology will permit the rational development of therapies to boost the production of these cells in times of need or reduce them when detrimental.
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Affiliation(s)
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore.,Shanghai Institute of Immunology, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Translational Immunology Institute, SingHealth Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Simon Yona
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University, Jerusalem, Israel
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Jardine L, Cytlak U, Gunawan M, Reynolds G, Green K, Wang XN, Pagan S, Paramitha M, Lamb CA, Long AK, Hurst E, Nair S, Jackson GH, Publicover A, Bigley V, Haniffa M, Simpson AJ, Collin M. Donor monocyte-derived macrophages promote human acute graft-versus-host disease. J Clin Invest 2021; 130:4574-4586. [PMID: 32453711 PMCID: PMC7456218 DOI: 10.1172/jci133909] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 05/19/2020] [Indexed: 12/16/2022] Open
Abstract
Myelopoiesis is invariably present and contributes to pathology in animal models of graft-versus-host disease (GVHD). In humans, a rich inflammatory infiltrate bearing macrophage markers has also been described in histological studies. In order to determine the origin, functional properties, and role in pathogenesis of these cells, we isolated single-cell suspensions from acute cutaneous GVHD and subjected them to genotype, transcriptome, and in vitro functional analysis. A donor-derived population of CD11c+CD14+ cells was the dominant population of all leukocytes in GVHD. Surface phenotype and NanoString gene expression profiling indicated the closest steady-state counterpart of these cells to be monocyte-derived macrophages. In GVHD, however, there was upregulation of monocyte antigens SIRPα and S100A8/9 transcripts associated with leukocyte trafficking, pattern recognition, antigen presentation, and costimulation. Isolated GVHD macrophages stimulated greater proliferation and activation of allogeneic T cells and secreted higher levels of inflammatory cytokines than their steady-state counterparts. In HLA-matched mixed leukocyte reactions, we also observed differentiation of activated macrophages with a similar phenotype. These exhibited cytopathicity to a keratinocyte cell line and mediated pathological damage to skin explants independently of T cells. Together, these results define the origin, functional properties, and potential pathogenic roles of human GVHD macrophages.
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Affiliation(s)
- Laura Jardine
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom.,Northern Centre for Bone Marrow Transplantation and.,NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Urszula Cytlak
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Merry Gunawan
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Gary Reynolds
- NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine and
| | - Kile Green
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | | | - Sarah Pagan
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Maharani Paramitha
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Christopher A Lamb
- NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine and
| | - Anna K Long
- NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine and
| | - Erin Hurst
- Northern Centre for Bone Marrow Transplantation and
| | - Smeera Nair
- Northern Centre for Bone Marrow Transplantation and
| | - Graham H Jackson
- Northern Centre for Bone Marrow Transplantation and.,Northern Institute of Cancer Research, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Amy Publicover
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom.,Northern Centre for Bone Marrow Transplantation and.,NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Venetia Bigley
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom.,Northern Centre for Bone Marrow Transplantation and.,NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Muzlifah Haniffa
- NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine and
| | - A J Simpson
- NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine and
| | - Matthew Collin
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom.,Northern Centre for Bone Marrow Transplantation and.,NIHR Newcastle Biomedical Research Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
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10
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Sreejit G, Fleetwood AJ, Murphy AJ, Nagareddy PR. Origins and diversity of macrophages in health and disease. Clin Transl Immunology 2020; 9:e1222. [PMID: 33363732 PMCID: PMC7750014 DOI: 10.1002/cti2.1222] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 12/14/2022] Open
Abstract
Macrophages are the first immune cells in the developing embryo and have a central role in organ development, homeostasis, immunity and repair. Over the last century, our understanding of these cells has evolved from being thought of as simple phagocytic cells to master regulators involved in governing a myriad of cellular processes. A better appreciation of macrophage biology has been matched with a clearer understanding of their diverse origins and the flexibility of their metabolic and transcriptional machinery. The understanding of the classical mononuclear phagocyte system in its original form has now been expanded to include the embryonic origin of tissue‐resident macrophages. A better knowledge of the intrinsic similarities and differences between macrophages of embryonic or monocyte origin has highlighted the importance of ontogeny in macrophage dysfunction in disease. In this review, we provide an update on origin and classification of tissue macrophages, the mechanisms of macrophage specialisation and their role in health and disease. The importance of the macrophage niche in providing trophic factors and a specialised environment for macrophage differentiation and specialisation is also discussed.
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Affiliation(s)
- Gopalkrishna Sreejit
- Division of Cardiac Surgery Department of Surgery The Ohio State University Wexner Medical Center Columbus OH USA
| | - Andrew J Fleetwood
- Division of Immunometabolism Baker Heart and Diabetes Institute Melbourne VIC Australia
| | - Andrew J Murphy
- Division of Immunometabolism Baker Heart and Diabetes Institute Melbourne VIC Australia
| | - Prabhakara R Nagareddy
- Division of Cardiac Surgery Department of Surgery The Ohio State University Wexner Medical Center Columbus OH USA
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11
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Iemura T, Arai Y, Kanda J, Kitawaki T, Hishizawa M, Kondo T, Yamashita K, Takaori-Kondo A. Impact of HLA class I allele-level mismatch on viral infection within 100 days after cord blood transplantation. Sci Rep 2020; 10:21150. [PMID: 33273656 PMCID: PMC7713055 DOI: 10.1038/s41598-020-78259-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/20/2020] [Indexed: 01/28/2023] Open
Abstract
Viral infection is more frequently reported in cord blood transplantation (CBT) than in transplantation of other stem cell sources, but its precise mechanism related to antiviral host defenses has not been elucidated yet. To evaluate the effect of human leukocyte antigen (HLA) class I allele-level incompatibility on viral infection in CBT, we conducted a single-center retrospective study. Total 94 patients were included, and viral infections were detected in 32 patients (34%) within 100 days after CBT. HLA-C mismatches in graft-versus-host direction showed a significantly higher incidence of viral infection (hazard ratio (HR), 3.67; p = 0.01), while mismatches in HLA-A, -B, or -DRB1 were not significant. Overall HLA class I mismatch was also a significant risk factor and the predictor of post-CBT viral infection (≥ 3 mismatches, HR 2.38, p = 0.02), probably due to the insufficient cytotoxic T cell recognition and dendritic cell priming. Patients with viral infection had significantly worse overall survival (52.7% vs. 72.1%; p = 0.02), and higher non-relapse mortality (29.3% vs. 9.8%; p = 0.01) at 5 years. Our findings suggest that appropriate graft selection as well as prophylaxis and early intervention for viral infection in such high-risk patients with ≥ 3 HLA class I allele-level mismatches, including HLA-C, may improve CBT outcomes.
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Affiliation(s)
- Tomoki Iemura
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yasuyuki Arai
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan. .,Department of Clinical Laboratory Medicine, Graduate School of Medicine, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Junya Kanda
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Toshio Kitawaki
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Masakatsu Hishizawa
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Tadakazu Kondo
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Kouhei Yamashita
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Akifumi Takaori-Kondo
- Department of Hematology and Oncology, Kyoto University, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
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12
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Kubota N, Saito A, Tanaka R, Nakamura Y, Watanabe R, Fujisawa Y, Ishitsuka Y, Clausen BE, Fujimoto M, Okiyama N. Langerhans Cells Suppress CD8 + T Cells In Situ during Mucocutaneous Acute Graft-Versus-Host Disease. J Invest Dermatol 2020; 141:1177-1187.e3. [PMID: 33091425 DOI: 10.1016/j.jid.2020.09.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 08/29/2020] [Accepted: 09/02/2020] [Indexed: 02/02/2023]
Abstract
Acute graft-versus-host disease (aGVHD) induced by allogenic hematopoietic stem cell transplantation is an immunological disorder in which donor lymphocytes attack recipient organs. It has been proven that recipient nonhematopoietic tissue cells, such as keratinocytes, are sufficient as immunological targets for allogenic donor T cells, whereas Langerhans cells (LCs) are potent professional hematopoietic antigen-presenting cells existing in the target epidermis and eliminated during the early phase of mucocutaneous aGVHD. Moreover, LCs have been reported to negatively regulate various types of immune responses. Here, we present data showing that initial depletion of recipient LCs exacerbates mucocutaneous lesions in a murine model of allogenic bone marrow transplantation-induced aGVHD. Furthermore, another murine model of mucocutaneous aGVHD induced in mice with keratinocytes genetically expressing chicken ovalbumin by transfer of ovalbumin-specific CD8+ OT-I cells also showed that LC-depleted recipient mice develop aggravated mucocutaneous disease owing to decreased apoptosis of skin-infiltrating OT-I cells. Moreover, coexisting LCs directly induce apoptosis and inhibit the proliferation of OT-I cells in vitro partially via B7 family proteins. Collectively, our results indicate that LCs negatively regulate mucocutaneous aGVHD-like lesions in situ by inhibiting the number of infiltrating CD8+ T cells.
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Affiliation(s)
- Noriko Kubota
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Akimasa Saito
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Ryota Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yoshiyuki Nakamura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Rei Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yasuhiro Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yosuke Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Björn E Clausen
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Manabu Fujimoto
- Department of Dermatology, Course of Integrated Medicine, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Naoko Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
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13
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Young JW. Alternative mechanisms that mediate graft-versus-host disease in allogeneic hematopoietic cell transplants. J Clin Invest 2020; 130:4532-4535. [PMID: 32716364 PMCID: PMC7456243 DOI: 10.1172/jci140064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Allogeneic hematopoietic cell transplantation (alloHCT) benefits increasing numbers of patients with otherwise lethal diseases. Graft-versus-host disease (GVHD), however, remains one of the most potentially life-threatening complications due to its own comorbidities and the side effects of its treatment. In this issue of the JCI, two groups have turned dogma on its head by providing evidence for alternative mechanisms of acute GVHD (aGVHD) in humans. The principle of donor T cell reactivity elicited by host antigen-presenting cells (APCs) expressing MHC-encoded major HLA disparities or expressing minor histocompatibility antigen (miHA) differences presented by identical HLA molecules remains intact. These reports, however, demonstrate that GVHD can additionally result from peripheral host T cells resident in skin and gut being stimulated against donor APCs in the form of monocyte-derived macrophages. Moreover, these donor monocyte-derived macrophages can themselves mediate cytopathic effects against resident host T cells in skin explants and against a keratinocyte-derived cell line.
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14
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Prevention and treatment of relapse after stem cell transplantation by cellular therapies. Bone Marrow Transplant 2018; 54:26-34. [PMID: 29795426 DOI: 10.1038/s41409-018-0227-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 03/28/2018] [Accepted: 04/04/2018] [Indexed: 12/27/2022]
Abstract
Despite recent advances in reducing therapy-related mortality after allogeneic stem cell transplantation (alloSCT) relapse remains the major cause of treatment failure and little progress has been achieved in the last decades. At the 3rd International Workshop on Biology, Prevention, and Treatment of Relapse held in Hamburg/Germany in November 2016 international experts presented and discussed recent developments in the field. Here, the potential of cellular therapies including unspecific and specific T cells, genetically modified T cells, CAR-T cells, NK-cells, and second allografting in prevention and treatment of relapse after alloSCT are summarized.
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15
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Santos e Sousa P, Bennett CL, Chakraverty R. Unraveling the Mechanisms of Cutaneous Graft-Versus-Host Disease. Front Immunol 2018; 9:963. [PMID: 29770141 PMCID: PMC5940745 DOI: 10.3389/fimmu.2018.00963] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/18/2018] [Indexed: 12/20/2022] Open
Abstract
The skin is the most common target organ affected by graft-versus-host disease (GVHD), with severity and response to therapy representing important predictors of patient survival. Although many of the initiating events in GVHD pathogenesis have been defined, less is known about why treatment resistance occurs or why there is often a permanent failure to restore tissue homeostasis. Emerging data suggest that the unique immune microenvironment in the skin is responsible for defining location- and context-specific mechanisms of injury that are distinct from those involved in other target organs. In this review, we address recent advances in our understanding of GVHD biology in the skin and outline the new research themes that will ultimately enable design of precision therapies.
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Affiliation(s)
- Pedro Santos e Sousa
- UCL Cancer Institute, University College London, London, United Kingdom
- UCL Institute of Immunity and Transplantation, University College London, London, United Kingdom
| | - Clare L. Bennett
- UCL Cancer Institute, University College London, London, United Kingdom
- UCL Institute of Immunity and Transplantation, University College London, London, United Kingdom
| | - Ronjon Chakraverty
- UCL Cancer Institute, University College London, London, United Kingdom
- UCL Institute of Immunity and Transplantation, University College London, London, United Kingdom
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16
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Collin M, Bigley V. Human dendritic cell subsets: an update. Immunology 2018; 154:3-20. [PMID: 29313948 PMCID: PMC5904714 DOI: 10.1111/imm.12888] [Citation(s) in RCA: 762] [Impact Index Per Article: 127.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/30/2017] [Accepted: 12/04/2017] [Indexed: 02/06/2023] Open
Abstract
Dendritic cells (DC) are a class of bone-marrow-derived cells arising from lympho-myeloid haematopoiesis that form an essential interface between the innate sensing of pathogens and the activation of adaptive immunity. This task requires a wide range of mechanisms and responses, which are divided between three major DC subsets: plasmacytoid DC (pDC), myeloid/conventional DC1 (cDC1) and myeloid/conventional DC2 (cDC2). Each DC subset develops under the control of a specific repertoire of transcription factors involving differential levels of IRF8 and IRF4 in collaboration with PU.1, ID2, E2-2, ZEB2, KLF4, IKZF1 and BATF3. DC haematopoiesis is conserved between mammalian species and is distinct from monocyte development. Although monocytes can differentiate into DC, especially during inflammation, most quiescent tissues contain significant resident populations of DC lineage cells. An extended range of surface markers facilitates the identification of specific DC subsets although it remains difficult to dissociate cDC2 from monocyte-derived DC in some settings. Recent studies based on an increasing level of resolution of phenotype and gene expression have identified pre-DC in human blood and heterogeneity among cDC2. These advances facilitate the integration of mouse and human immunology, support efforts to unravel human DC function in vivo and continue to present new translational opportunities to medicine.
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Affiliation(s)
- Matthew Collin
- Human Dendritic Cell LabInstitute of Cellular Medicine and NIHR Newcastle Biomedical Research Centre Newcastle upon Tyne Hospitals NHS Foundation Trust and Newcastle UniversityNewcastle upon TyneUK
| | - Venetia Bigley
- Human Dendritic Cell LabInstitute of Cellular Medicine and NIHR Newcastle Biomedical Research Centre Newcastle upon Tyne Hospitals NHS Foundation Trust and Newcastle UniversityNewcastle upon TyneUK
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17
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Falkenburg JHF, Jedema I. Graft versus tumor effects and why people relapse. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2017; 2017:693-698. [PMID: 29222323 PMCID: PMC6142614 DOI: 10.1182/asheducation-2017.1.693] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Graft-versus-tumor (GVT) reactivity mediated by donor T cells in the context of allogeneic stem cell transplantation (alloSCT) is one of the most potent forms of cellular immunotherapy. The antitumor effect against hematologic malignancies is mediated by a polyclonal T-cell response targeting polymorphic antigens expressed on hematopoietic tissues of the recipient, leaving donor hematopoiesis in the patient after transplantation unharmed. Fortunately, hematopoietic tissues (including malignant hematopoietic cell populations) are relatively susceptible to T-cell recognition. If, however, nonhematopoietic tissues of the recipient are targeted as well, graft-versus-host disease (GVHD) will occur. The balance between GVT and GVHD is influenced by the genetic disparity between donor and recipient, the number and origin of professional antigen-presenting cells provoking the immune response, the target antigen specificity, magnitude and diversity of the response, and the in vivo inflammatory environment, whereas inhibitory factors may silence the immune response. Manipulation of each of these factors will determine the balance between GVT and GVHD.
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Affiliation(s)
| | - Inge Jedema
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
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18
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Lutz MB, Strobl H, Schuler G, Romani N. GM-CSF Monocyte-Derived Cells and Langerhans Cells As Part of the Dendritic Cell Family. Front Immunol 2017; 8:1388. [PMID: 29109731 PMCID: PMC5660299 DOI: 10.3389/fimmu.2017.01388] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/09/2017] [Indexed: 12/21/2022] Open
Abstract
Dendritic cells (DCs) and macrophages (Mph) share many characteristics as components of the innate immune system. The criteria to classify the multitude of subsets within the mononuclear phagocyte system are currently phenotype, ontogeny, transcription patterns, epigenetic adaptations, and function. More recently, ontogenetic, transcriptional, and proteomic research approaches uncovered major developmental differences between Flt3L-dependent conventional DCs as compared with Mphs and monocyte-derived DCs (MoDCs), the latter mainly generated in vitro from murine bone marrow-derived DCs (BM-DCs) or human CD14+ peripheral blood monocytes. Conversely, in vitro GM-CSF-dependent monocyte-derived Mphs largely resemble MoDCs whereas tissue-resident Mphs show a common embryonic origin from yolk sac and fetal liver with Langerhans cells (LCs). The novel ontogenetic findings opened discussions on the terminology of DCs versus Mphs. Here, we bring forward arguments to facilitate definitions of BM-DCs, MoDCs, and LCs. We propose a group model of terminology for all DC subsets that attempts to encompass both ontogeny and function.
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Affiliation(s)
- Manfred B Lutz
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Herbert Strobl
- Institute of Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Gerold Schuler
- Department of Dermatology, University Hospital Erlangen, Erlangen, Germany
| | - Nikolaus Romani
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
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19
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Kreft A, Krümpelmann K, Rosenwald A, Hollemann D, Wagner-Drouet EM. Dermatopathic lymphadenopathy with Langerhans cell chimerism in graft-versus-host disease of the skin. Eur J Haematol 2017; 99:582-585. [PMID: 28888027 DOI: 10.1111/ejh.12968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2017] [Indexed: 11/28/2022]
Abstract
Dermatopathic lymphadenopathy (DL) is well-known in inflammatory skin disease; however, it has not been reported in graft-versus-host disease (GvHD) after allogeneic stem cell transplantation. Here, we report 2 cases of DL in patients with acute GvHD of the skin and demonstrate complete donor chimerism of Langerhans cells within the lymph nodes.
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Affiliation(s)
- Andreas Kreft
- Institute of Pathology, University Medical Centre Mainz, Mainz, Germany
| | | | - Andreas Rosenwald
- Institute of Pathology, University of Würzburg and Comprehensive Cancer Centre, Würzburg, Germany
| | - David Hollemann
- Institute of Pathology, University Medical Centre Regensburg, Regensburg, Germany
| | - Eva Maria Wagner-Drouet
- Department of Internal Medicine III, University Cancer Center, University Medical Centre Mainz, Mainz, Germany
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20
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Abstract
The maintenance of monocytes, macrophages, and dendritic cells (DCs) involves manifold pathways of ontogeny and homeostasis that have been the subject of intense study in recent years. The concept of a peripheral mononuclear phagocyte system continually renewed by blood-borne monocytes has been modified to include specialized DC pathways of development that do not involve monocytes, and longevity through self-renewal of tissue macrophages. The study of development remains difficult owing to the plasticity of phenotypes and misconceptions about the fundamental structure of hematopoiesis. However, greater clarity has been achieved in distinguishing inflammatory monocyte-derived DCs from DCs arising in the steady state, and new concepts of conjoined lymphomyeloid hematopoiesis more easily accommodate the shared lymphoid and myeloid phenotypes of some DCs. Cross-species comparisons have also yielded coherent systems of nomenclature for all mammalian monocytes, macrophages, and DCs. Finally, the clear relationships between ontogeny and functional specialization offer information about the regulation of immune responses and provide new tools for the therapeutic manipulation of myeloid mononuclear cells in medicine.
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21
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Stewart CL, Cornejo CM, Wanat KA, Sander I, Samimi S, Prouty S, Seykora J, Zhang P, Rosenbach M, Kim EJ, Micheletti RG. The immune reconstitution of the skin following sex-mismatched allogeneic haematopoietic stem cell transplant: a prospective case series utilizing fluorescence in situ hybridization and immunohistochemistry. Br J Dermatol 2017; 178:e55-e56. [PMID: 28796881 DOI: 10.1111/bjd.15878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C L Stewart
- Department of Medicine, Division of Dermatology, University of Washington, Seattle, WA, U.S.A
| | - C M Cornejo
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - K A Wanat
- Department of Dermatology, University of Iowa, Iowa City, IA, U.S.A.,Department of Pathology, University of Iowa, Iowa City, IA, U.S.A
| | - I Sander
- Department of Dermatology, Johns Hopkins University, Baltimore, MD, U.S.A
| | - S Samimi
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - S Prouty
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - J Seykora
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - P Zhang
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - M Rosenbach
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - E J Kim
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
| | - R G Micheletti
- Departments of Dermatology and Pathology, University of Pennsylvania, Philadelphia, PA, U.S.A
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22
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von Máriássy D, Bayer B, Anslinger K. Irritierende Ergebnisse einer DNA-Analyse aus Mischspuren. Rechtsmedizin (Berl) 2017. [DOI: 10.1007/s00194-017-0152-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Ogonek J, Varanasi P, Luther S, Schweier P, Kühnau W, Göhring G, Dammann E, Stadler M, Ganser A, Borchers S, Koehl U, Weissinger EM, Hambach L. Possible Impact of Cytomegalovirus-Specific CD8 + T Cells on Immune Reconstitution and Conversion to Complete Donor Chimerism after Allogeneic Stem Cell Transplantation. Biol Blood Marrow Transplant 2017; 23:1046-1053. [PMID: 28344058 DOI: 10.1016/j.bbmt.2017.03.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/17/2017] [Indexed: 12/22/2022]
Abstract
Complete donor chimerism is strongly associated with complete remission after allogeneic stem cell transplantation (allo-SCT) in patients with hematologic malignancies. Donor-derived allo-immune responses eliminate the residual host hematopoiesis and thereby mediate the conversion to complete donor chimerism. Recently, cytomegalovirus (CMV) reactivation was described to enhance overall T cell reconstitution, to increase graft-versus-host disease incidence, and to reduce the leukemia relapse risk. However, the link between CMV and allo-immune responses is still unclear. Here, we studied the relationship between CMV-specific immunity, overall T cell reconstitution, and residual host chimerism in 106 CMV-seropositive patients transplanted after reduced-intensity conditioning including antithymocyte globulin. In accordance with previous reports, the recovery of CMV-specific cytotoxic T cells (CMV-CTLs) was more frequent in CMV-seropositive recipients (R) transplanted from CMV-seropositive than from seronegative donors (D). However, once CMV-CTLs were detectable, the reconstitution of CMV-specific CTLs was comparable in CMV R+/D- and R+/D+ patients. CD3+ and CD8+ T cell reconstitution was significantly faster in patients with CMV-CTLs than in patients without CMV-CTLs both in the CMV R+/D- and R+/D+ setting. Moreover, CMV-CTL numbers correlated with CD3+ and CD8+ T cell numbers in both settings. Finally, presence of CMV-CTLs was associated with low host chimerism levels 3 months after allo-SCT. In conclusion, our data provide a first indication that CMV-CTLs in CMV-seropositive patients might trigger the reconstitution of T cells and allo-immune responses reflected by the conversion to complete donor chimerism.
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Affiliation(s)
- Justyna Ogonek
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Pavankumar Varanasi
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany; German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany
| | - Susanne Luther
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Patrick Schweier
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Wolfgang Kühnau
- Department Human Genetics, Hannover Medical School, Hannover, Germany
| | - Gudrun Göhring
- Department Human Genetics, Hannover Medical School, Hannover, Germany
| | - Elke Dammann
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Michael Stadler
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Arnold Ganser
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | | | - Ulrike Koehl
- Institute of Cellular Therapeutics, Hannover Medical School, Hannover, Germany
| | - Eva M Weissinger
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany; German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany
| | - Lothar Hambach
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany.
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24
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Peters S, Junghanss C, Knueppel A, Murua Escobar H, Roolf C, Knuebel G, Sekora A, Lindner I, Jonas L, Freund M, Lange S. Kinetics of Langerhans cell chimerism in the skin of dogs following 2 Gy TBI allogeneic hematopoietic stem cell transplantation. BMC HEMATOLOGY 2016; 16:11. [PMID: 27127633 PMCID: PMC4848868 DOI: 10.1186/s12878-016-0050-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 04/20/2016] [Indexed: 11/26/2022]
Abstract
Background Langerhans cells (LC) are bone marrow-derived cells in the skin. The LC donor/recipient chimerism is assumed to influence the incidence and severity of graft-versus-host disease (GVHD) after hematopoietic stem cell transplantation (HSCT). In nonmyeloablative (NM) HSCT the appearance of acute GVHD is delayed when compared with myeloablative conditioning. Therefore, we examined the development of LC chimerism in a NM canine HSCT model. Methods 2 Gy conditioned dogs received bone marrow from dog leukocyte antigen identical littermates. Skin biopsies were obtained pre- and post-transplant. LC isolation was performed by immunomagnetic separation and chimerism analysis by PCR analyzing variable-number-of-tandem-repeat markers with subsequent capillary electrophoresis. Results All dogs engrafted. Compared to peripheral blood chimerism the development of LC chimerism was delayed (earliest at day +56). None of the dogs achieved complete donor LC chimerism, although two dogs manifested a 100 % donor chimerism in peripheral blood at days +91 and +77. Of interest, one dog remained LC chimeric despite loss of donor chimerism in the peripheral blood cells. Conclusion Our study indicates that LC donor chimerism correlates with chimerism development in the peripheral blood but occurs delayed following NM-HSCT.
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Affiliation(s)
- Sabrina Peters
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Christian Junghanss
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Anne Knueppel
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Hugo Murua Escobar
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Catrin Roolf
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Gudrun Knuebel
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Anett Sekora
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Iris Lindner
- Institute of Legal Medicine, Division of Medicine, University of Rostock, St.-Georg-Str. 108, 18055 Rostock, Germany
| | - Ludwig Jonas
- Electron Microscopic Centre, Division of Medicine, University of Rostock, Strempelstr. 14, 18057 Rostock, Germany
| | - Mathias Freund
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
| | - Sandra Lange
- Department of Hematology, Oncology, Palliative Medicine, Division of Medicine, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany
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Lavin Y, Mortha A, Rahman A, Merad M. Regulation of macrophage development and function in peripheral tissues. Nat Rev Immunol 2016; 15:731-44. [PMID: 26603899 DOI: 10.1038/nri3920] [Citation(s) in RCA: 415] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Macrophages are immune cells of haematopoietic origin that provide crucial innate immune defence and have tissue-specific functions in the regulation and maintenance of organ homeostasis. Recent studies of macrophage ontogeny, as well as transcriptional and epigenetic identity, have started to reveal the decisive role of the tissue stroma in the regulation of macrophage function. These findings suggest that most macrophages seed the tissues during embryonic development and functionally specialize in response to cytokines and metabolites that are released by the stroma and drive the expression of unique transcription factors. In this Review, we discuss how recent insights into macrophage ontogeny and macrophage-stroma interactions contribute to our understanding of the crosstalk that shapes macrophage function and the maintenance of organ integrity.
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Affiliation(s)
- Yonit Lavin
- Department of Oncological Sciences, Tisch Cancer Institute and the Immunology Institute, Icahn School of Medicine at Mount Sinai, New York City, New York 10029, USA
| | - Arthur Mortha
- Department of Oncological Sciences, Tisch Cancer Institute and the Immunology Institute, Icahn School of Medicine at Mount Sinai, New York City, New York 10029, USA
| | - Adeeb Rahman
- Department of Oncological Sciences, Tisch Cancer Institute and the Immunology Institute, Icahn School of Medicine at Mount Sinai, New York City, New York 10029, USA
| | - Miriam Merad
- Department of Oncological Sciences, Tisch Cancer Institute and the Immunology Institute, Icahn School of Medicine at Mount Sinai, New York City, New York 10029, USA
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Picarda G, Chéneau C, Humbert JM, Bériou G, Pilet P, Martin J, Duteille F, Perrot P, Bellier-Waast F, Heslan M, Haspot F, Guillon F, Josien R, Halary FA. Functional Langerinhigh-Expressing Langerhans-like Cells Can Arise from CD14highCD16−Human Blood Monocytes in Serum-Free Condition. THE JOURNAL OF IMMUNOLOGY 2016; 196:3716-28. [DOI: 10.4049/jimmunol.1501304] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 02/23/2016] [Indexed: 12/31/2022]
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Abstract
PURPOSE OF REVIEW This article summarizes recent research on the ontogeny of Langerhans cells and regulation of their homeostasis in quiescent and inflamed conditions. RECENT FINDINGS Langerhans cells originate prenatally and may endure throughout life, independently of bone marrow-derived precursors. Fate-mapping experiments have recently resolved the relative contribution of primitive yolk sac and fetal liver hematopoiesis to the initial formation of Langerhans cells. In postnatal life, local self-renewal restores Langerhans cell numbers following chronic or low-grade inflammatory insults. However, severe inflammation recruits de-novo bone marrow-derived precursors in two waves; a transient population of classical monocytes followed by uncharacterized myeloid precursors that form a stable self-renewing Langerhans cell network as inflammation subsides. Human CD1c⁺ dendritic cells have Langerhans cell potential in vitro, raising the possibility that dendritic cell progenitors provide the second wave. Langerhans cell development depends upon transforming growth factor beta receptor signaling with distinct pathways active during differentiation and homeostasis. Langerhans cell survival is mediated by multiple pathways including mechanistic target of rapamycin and extracellular signal-regulated kinase signaling, mechanisms that become highly relevant in Langerhans cell neoplasia. SUMMARY The study of Langerhans cells continues to provide novel and unexpected insights into the origin and regulation of myeloid cell populations. The melding of macrophage and dendritic cell biology, shaped by a unique habitat, is a special feature of Langerhans cells.
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Affiliation(s)
- Matthew Collin
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle upon Tyne, UK
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Abstract
Langerhans cell histiocytosis (LCH) is heterogeneous disease characterized by common histology of inflammatory lesions containing Langerin(+) (CD207) histiocytes. Emerging data support a model in which MAPK activation in self-renewing hematopoietic progenitors may drive disseminated high-risk disease, whereas MAPK activation in more differentiated committed myeloid populations may induce low-risk LCH. The heterogeneous clinical manifestations with shared histology may represent the final common pathway of an acquired defect of differentiation, initiated at more than one point. Implications of this model include re-definition of LCH as a myeloid neoplasia and re-focusing therapeutic strategies on the cells and lineages of origin.
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Affiliation(s)
- Matthew Collin
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
| | - Venetia Bigley
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
| | - Kenneth L McClain
- Texas Children's Cancer Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Carl E Allen
- Texas Children's Cancer Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
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29
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Reynolds G, Haniffa M. Human and Mouse Mononuclear Phagocyte Networks: A Tale of Two Species? Front Immunol 2015; 6:330. [PMID: 26124761 PMCID: PMC4479794 DOI: 10.3389/fimmu.2015.00330] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 06/12/2015] [Indexed: 12/22/2022] Open
Abstract
Dendritic cells (DCs), monocytes, and macrophages are a heterogeneous population of mononuclear phagocytes that are involved in antigen processing and presentation to initiate and regulate immune responses to pathogens, vaccines, tumor, and tolerance to self. In addition to their afferent sentinel function, DCs and macrophages are also critical as effectors and coordinators of inflammation and homeostasis in peripheral tissues. Harnessing DCs and macrophages for therapeutic purposes has major implications for infectious disease, vaccination, transplantation, tolerance induction, inflammation, and cancer immunotherapy. There has been a paradigm shift in our understanding of the developmental origin and function of the cellular constituents of the mononuclear phagocyte system. Significant progress has been made in tandem in both human and mouse mononuclear phagocyte biology. This progress has been accelerated by comparative biology analysis between mouse and human, which has proved to be an exceptionally fruitful strategy to harmonize findings across species. Such analyses have provided unexpected insights and facilitated productive reciprocal and iterative processes to inform our understanding of human and mouse mononuclear phagocytes. In this review, we discuss the strategies, power, and utility of comparative biology approaches to integrate recent advances in human and mouse mononuclear phagocyte biology and its potential to drive forward clinical translation of this knowledge. We also present a functional framework on the parallel organization of human and mouse mononuclear phagocyte networks.
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Affiliation(s)
- Gary Reynolds
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University , Newcastle upon Tyne , UK ; Musculoskeletal Research Group, Institute of Cellular Medicine, Newcastle University , Newcastle upon Tyne , UK
| | - Muzlifah Haniffa
- Human Dendritic Cell Laboratory, Institute of Cellular Medicine, Newcastle University , Newcastle upon Tyne , UK
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30
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Human mononuclear phagocyte system reunited. Semin Cell Dev Biol 2015; 41:59-69. [DOI: 10.1016/j.semcdb.2015.05.004] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 05/11/2015] [Indexed: 12/31/2022]
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Dey A, Allen J, Hankey-Giblin PA. Ontogeny and polarization of macrophages in inflammation: blood monocytes versus tissue macrophages. Front Immunol 2015; 5:683. [PMID: 25657646 PMCID: PMC4303141 DOI: 10.3389/fimmu.2014.00683] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/17/2014] [Indexed: 12/23/2022] Open
Abstract
The explosion of new information in recent years on the origin of macrophages in the steady-state and in the context of inflammation has opened up numerous new avenues of investigation and possibilities for therapeutic intervention. In contrast to the classical model of macrophage development, it is clear that tissue-resident macrophages can develop from yolk sac-derived erythro-myeloid progenitors, fetal liver progenitors, and bone marrow-derived monocytes. Under both homeostatic conditions and in response to pathophysiological insult, the contribution of these distinct sources of macrophages varies significantly between tissues. Furthermore, while all of these populations of macrophages appear to be capable of adopting the polarized M1/M2 phenotypes, their respective contribution to inflammation, resolution of inflammation, and tissue repair remains poorly understood and is likely to be tissue- and disease-dependent. A better understanding of the ontology and polarization capacity of macrophages in homeostasis and disease will be essential for the development of novel therapies that target the inherent plasticity of macrophages in the treatment of acute and chronic inflammatory disease.
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Affiliation(s)
- Adwitia Dey
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University , University Park, PA , USA ; Graduate Program in Physiology, The Pennsylvania State University , University Park, PA , USA
| | - Joselyn Allen
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University , University Park, PA , USA ; Graduate Program in Immunology and Infectious Disease, The Pennsylvania State University , University Park, PA , USA
| | - Pamela A Hankey-Giblin
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University , University Park, PA , USA ; Graduate Program in Physiology, The Pennsylvania State University , University Park, PA , USA ; Graduate Program in Immunology and Infectious Disease, The Pennsylvania State University , University Park, PA , USA
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Abstract
Langerhans cells (LCs) are self-renewing in the steady state but repopulated by myeloid precursors after injury. Human monocytes give rise to langerin-positive cells in vitro, suggesting a potential precursor role. However, differentiation experiments with human lineage-negative cells and CD34(+) progenitors suggest that there is an alternative monocyte-independent pathway of LC differentiation. Recent data in mice also show long-term repopulation of the LC compartment with alternative myeloid precursors. Here we show that, although monocytes are able to express langerin, when cultured with soluble ligands granulocyte macrophage colony-stimulating factor (GM-CSF), transforming growth factor β (TGFβ), and bone morphogenetic protein 7 (BMP7), CD1c(+) dendritic cells (DCs) become much more LC-like with high langerin, Birbeck granules, EpCAM, and E-cadherin expression under the same conditions. These data highlight a new potential precursor function of CD1c(+) DCs and demonstrate an alternative pathway of LC differentiation that may have relevance in vivo.
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