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García-Arévalo F, Leija-Montoya AG, González-Ramírez J, Isiordia-Espinoza M, Serafín-Higuera I, Fuchen-Ramos DM, Vazquez-Jimenez JG, Serafín-Higuera N. Modulation of myeloid-derived suppressor cell functions by oral inflammatory diseases and important oral pathogens. Front Immunol 2024; 15:1349067. [PMID: 38495880 PMCID: PMC10940359 DOI: 10.3389/fimmu.2024.1349067] [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: 12/04/2023] [Accepted: 02/21/2024] [Indexed: 03/19/2024] Open
Abstract
The oral cavity presents a diverse microbiota in a dynamic balance with the host. Disruption of the microbial community can promote dysregulation of local immune response which could generate oral diseases. Additionally, alterations in host immune system can result in inflammatory disorders. Different microorganisms have been associated with establishment and progression of the oral diseases. Oral cavity pathogens/diseases can modulate components of the inflammatory response. Myeloid-derived suppressor cells (MDSCs) own immunoregulatory functions and have been involved in different inflammatory conditions such as infectious processes, autoimmune diseases, and cancer. The aim of this review is to provide a comprehensive overview of generation, phenotypes, and biological functions of the MDSCs in oral inflammatory diseases. Also, it is addressed the biological aspects of MDSCs in presence of major oral pathogens. MDSCs have been mainly analyzed in periodontal disease and Sjögren's syndrome and could be involved in the outcome of these diseases. Studies including the participation of MDSCs in other important oral diseases are very scarce. Major oral bacterial and fungal pathogens can modulate expansion, subpopulations, recruitment, metabolism, immunosuppressive activity and osteoclastogenic potential of MDSCs. Moreover, MDSC plasticity is exhibited in presence of oral inflammatory diseases/oral pathogens and appears to be relevant in the disease progression and potentially useful in the searching of possible treatments. Further analyses of MDSCs in oral cavity context could allow to understand the contribution of these cells in the fine-tuned balance between host immune system and microorganism of the oral biofilm, as well as their involvement in the development of oral diseases when this balance is altered.
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Affiliation(s)
- Fernando García-Arévalo
- Laboratorio de Biología Celular, Centro de Ciencias de la Salud Mexicali, Facultad de Odontología Mexicali, Universidad Autónoma de Baja California, Mexicali, BC, Mexico
| | | | - Javier González-Ramírez
- Laboratorio de Biología Molecular, Centro de Ciencias de la Salud Mexicali, Facultad de Enfermería Mexicali, Universidad Autónoma de Baja California, Mexicali, BC, Mexico
| | - Mario Isiordia-Espinoza
- Instituto de Investigación en Ciencias Médicas, Departamento de Clínicas, División de Ciencias Biomédicas, Centro Universitario de los Altos, Universidad de Guadalajara, Tepatitlán de Morelos, Jal, Mexico
| | - Idanya Serafín-Higuera
- Laboratorio de Microbiología, Facultad de Medicina, Universidad Autónoma de Baja California, Tijuana, BC, Mexico
| | - Dulce Martha Fuchen-Ramos
- Laboratorio de Biología Celular, Centro de Ciencias de la Salud Mexicali, Facultad de Odontología Mexicali, Universidad Autónoma de Baja California, Mexicali, BC, Mexico
| | | | - Nicolas Serafín-Higuera
- Laboratorio de Biología Celular, Centro de Ciencias de la Salud Mexicali, Facultad de Odontología Mexicali, Universidad Autónoma de Baja California, Mexicali, BC, Mexico
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2
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Esher Righi S, Harriett AJ, Lilly EA, Fidel PL, Noverr MC. Candida-induced granulocytic myeloid-derived suppressor cells are protective against polymicrobial sepsis. mBio 2023; 14:e0144623. [PMID: 37681975 PMCID: PMC10653853 DOI: 10.1128/mbio.01446-23] [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: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 09/09/2023] Open
Abstract
IMPORTANCE Polymicrobial intra-abdominal infections are serious clinical infections that can lead to life-threatening sepsis, which is difficult to treat in part due to the complex and dynamic inflammatory responses involved. Our prior studies demonstrated that immunization with low-virulence Candida species can provide strong protection against lethal polymicrobial sepsis challenge in mice. This long-lived protection was found to be mediated by trained Gr-1+ polymorphonuclear leukocytes with features resembling myeloid-derived suppressor cells (MDSCs). Here we definitively characterize these cells as MDSCs and demonstrate that their mechanism of protection involves the abrogation of lethal inflammation, in part through the action of the anti-inflammatory cytokine interleukin (IL)-10. These studies highlight the role of MDSCs and IL-10 in controlling acute lethal inflammation and give support for the utility of trained tolerogenic immune responses in the clinical treatment of sepsis.
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Affiliation(s)
- Shannon Esher Righi
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Amanda J. Harriett
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Elizabeth A. Lilly
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Paul L. Fidel
- Center of Excellence in Oral and Craniofacial Biology, Louisiana State University Health Sciences Center School of Dentistry, New Orleans, Louisiana, USA
| | - Mairi C. Noverr
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana, USA
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3
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Gjerstorff MF. Epigenetic targeting of myeloid-derived suppressor cells: time to move into infectious diseases? Front Immunol 2023; 14:1247715. [PMID: 37680643 PMCID: PMC10482232 DOI: 10.3389/fimmu.2023.1247715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 08/14/2023] [Indexed: 09/09/2023] Open
Affiliation(s)
- Morten Frier Gjerstorff
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
- Department of Oncology, Odense University Hospital, Odense, Denmark
- Academy of Geriatric Cancer Research (AgeCare), Odense University Hospital, Odense, Denmark
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4
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Kaminski VDL, Preite NW, Borges BM, Dos Santos BV, Calich VLG, Loures FV. The immunosuppressive activity of myeloid-derived suppressor cells in murine Paracoccidioidomycosis relies on Indoleamine 2,3-dioxygenase activity and Dectin-1 and TLRs signaling. Sci Rep 2023; 13:12391. [PMID: 37524886 PMCID: PMC10390561 DOI: 10.1038/s41598-023-39262-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/22/2023] [Indexed: 08/02/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is a systemic mycosis with a high incidence in Latin America. Prior studies have demonstrated the significance of the enzyme Indoleamine 2,3-dioxygenase (IDO-1) in the immune regulation of PCM as well as the vital role of myeloid-derived suppressor cells (MDSCs) in moderating PCM severity. Additionally, Dectin-1 and Toll-Like Receptors (TLRs) signaling in cancer, infection, and autoimmune diseases have been shown to impact MDSC-IDO-1+ activity. To expand our understanding of MDSCs and the role of IDO-1 and pattern recognition receptors (PRRs) signaling in PCM, we generated MDSCs in vitro and administered an IDO-1 inhibitor before challenging the cells with Paracoccidioides brasiliensis yeasts. By co-culturing MDSCs with lymphocytes, we assessed T-cell proliferation to examine the influence of IDO-1 on MDSC activity. Moreover, we utilized specific antibodies and MDSCs from Dectin-1, TLR4, and TLR2 knockout mice to evaluate the effect of these PRRs on IDO-1 production by MDSCs. We confirmed the importance of these in vitro findings by assessing MDSC-IDO-1+ in the lungs of mice following the fungal infection. Taken together, our data show that IDO-1 expression by MDSCs is crucial for the control of T-cell proliferation, and the production of this enzyme is partially dependent on Dectin-1, TLR2, and TLR4 signaling during murine PCM.
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Affiliation(s)
- Valéria de Lima Kaminski
- Institute of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - Nycolas Willian Preite
- Institute of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - Bruno Montanari Borges
- Institute of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - Bianca Vieira Dos Santos
- Institute of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - Vera Lucia Garcia Calich
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo - USP, São Paulo, Brazil
| | - Flávio Vieira Loures
- Institute of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil.
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5
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Ostrand-Rosenberg S, Lamb TJ, Pawelec G. Here, There, and Everywhere: Myeloid-Derived Suppressor Cells in Immunology. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 210:1183-1197. [PMID: 37068300 PMCID: PMC10111205 DOI: 10.4049/jimmunol.2200914] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/06/2023] [Indexed: 04/19/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs) were initially identified in humans and mice with cancer where they profoundly suppress T cell- and NK cell-mediated antitumor immunity. Inflammation is a central feature of many pathologies and normal physiological conditions and is the dominant driving force for the accumulation and function of MDSCs. Therefore, MDSCs are present in conditions where inflammation is present. Although MDSCs are detrimental in cancer and conditions where cellular immunity is desirable, they are beneficial in settings where cellular immunity is hyperactive. Because MDSCs can be generated ex vivo, they are being exploited as therapeutic agents to reduce damaging cellular immunity. In this review, we discuss the detrimental and beneficial roles of MDSCs in disease settings such as bacterial, viral, and parasitic infections, sepsis, obesity, trauma, stress, autoimmunity, transplantation and graft-versus-host disease, and normal physiological settings, including pregnancy and neonates as well as aging. The impact of MDSCs on vaccination is also discussed.
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Affiliation(s)
- Suzanne Ostrand-Rosenberg
- Division of Microbiology and Immunology, Department of Pathology, University of Utah 84112, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA
| | - Tracey J. Lamb
- Division of Microbiology and Immunology, Department of Pathology, University of Utah 84112, Salt Lake City, UT
| | - Graham Pawelec
- Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, Tübingen, Germany, and Health Sciences North Research Institute, Sudbury, ON, Canada
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6
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Borgna E, Prochetto E, Gamba JC, Marcipar I, Cabrera G. Role of myeloid-derived suppressor cells during Trypanosoma cruzi infection. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2023; 375:117-163. [PMID: 36967151 DOI: 10.1016/bs.ircmb.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Chagas disease (CD), caused by the protozoan parasite Trypanosoma cruzi, is the third largest parasitic disease burden globally. Currently, more than 6 million people are infected, mainly in Latin America, but international migration has turned CD into an emerging health problem in many nonendemic countries. Despite intense research, a vaccine is still not available. A complex parasite life cycle, together with numerous immune system manipulation strategies, may account for the lack of a prophylactic or therapeutic vaccine. There is substantial experimental evidence supporting that T. cruzi acute infection generates a strong immunosuppression state that involves numerous immune populations with regulatory/suppressive capacity. Myeloid-derived suppressor cells (MDSCs), Foxp3+ regulatory T cells (Tregs), regulatory dendritic cells and B regulatory cells are some of the regulatory populations that have been involved in the acute immune response elicited by the parasite. The fact that, during acute infection, MDSCs increase notably in several organs, such as spleen, liver and heart, together with the observation that depletion of those cells can decrease mouse survival to 0%, strongly suggests that MDSCs play a major role during acute T. cruzi infection. Accumulating evidence gained in different settings supports the capacity of MDSCs to interact with cells from both the effector and the regulatory arms of the immune system, shaping the outcome of the response in a very wide range of scenarios that include pathological and physiological processes. In this sense, the aim of the present review is to describe the main knowledge about MDSCs acquired so far, including several crosstalk with other immune populations, which could be useful to gain insight into their role during T. cruzi infection.
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Prochetto E, Borgna E, Jiménez-Cortegana C, Sánchez-Margalet V, Cabrera G. Myeloid-derived suppressor cells and vaccination against pathogens. Front Cell Infect Microbiol 2022; 12:1003781. [PMID: 36250061 PMCID: PMC9557202 DOI: 10.3389/fcimb.2022.1003781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/15/2022] [Indexed: 12/01/2022] Open
Abstract
It is widely accepted that the immune system includes molecular and cellular components that play a role in regulating and suppressing the effector immune response in almost any process in which the immune system is involved. Myeloid-derived suppressor cells (MDSCs) are described as a heterogeneous population of myeloid origin, immature state, with a strong capacity to suppress T cells and other immune populations. Although the initial characterization of these cells was strongly associated with pathological conditions such as cancer and then with chronic and acute infections, extensive evidence supports that MDSCs are also involved in physiological/non-pathological settings, including pregnancy, neonatal period, aging, and vaccination. Vaccination is one of the greatest public health achievements and has reduced mortality and morbidity caused by many pathogens. The primary goal of prophylactic vaccination is to induce protection against a potential pathogen by mimicking, at least in a part, the events that take place during its natural interaction with the host. This strategy allows the immune system to prepare humoral and cellular effector components to cope with the real infection. This approach has been successful in developing vaccines against many pathogens. However, when the infectious agents can evade and subvert the host immune system, inducing cells with regulatory/suppressive capacity, the development of vaccines may not be straightforward. Notably, there is a long list of complex pathogens that can expand MDSCs, for which a vaccine is still not available. Moreover, vaccination against numerous bacteria, viruses, parasites, and fungi has also been shown to cause MDSC expansion. Increases are not due to a particular adjuvant or immunization route; indeed, numerous adjuvants and immunization routes have been reported to cause an accumulation of this immunosuppressive population. Most of the reports describe that, according to their suppressive nature, MDSCs may limit vaccine efficacy. Taking into account the accumulated evidence supporting the involvement of MDSCs in vaccination, this review aims to compile the studies that highlight the role of MDSCs during the assessment of vaccines against pathogens.
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Affiliation(s)
- Estefanía Prochetto
- Laboratorio de Tecnología Inmunológica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe capital, Argentina
| | - Eliana Borgna
- Laboratorio de Tecnología Inmunológica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe capital, Argentina
| | - Carlos Jiménez-Cortegana
- Clinical Laboratory, Department of Medical Biochemistry, Molecular Biology and Immunology, School of Medicine, Virgen Macarena University Hospital, University of Seville, Seville, Spain
| | - Víctor Sánchez-Margalet
- Clinical Laboratory, Department of Medical Biochemistry, Molecular Biology and Immunology, School of Medicine, Virgen Macarena University Hospital, University of Seville, Seville, Spain
| | - Gabriel Cabrera
- Laboratorio de Tecnología Inmunológica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe capital, Argentina
- *Correspondence: Gabriel Cabrera,
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8
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Li T, Liu T, Zhao Z, Pan Y, Xu X, Zhang Y, Zhan S, Zhou S, Zhu W, Guo H, Yang R. Antifungal immunity mediated by C-type lectin receptors may be a novel target in immunotherapy for urothelial bladder cancer. Front Immunol 2022; 13:911325. [PMID: 36131933 PMCID: PMC9483128 DOI: 10.3389/fimmu.2022.911325] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 07/18/2022] [Indexed: 11/29/2022] Open
Abstract
Immunotherapies, such as immune-checkpoint blockade and adoptive T-cell therapy, offer novel treatment options with good efficacy for patients with urothelial bladder cancer. However, heterogeneity and therapeutic resistance have limited the use of immunotherapy. Further research into immune-regulatory mechanisms in bladder cancer is urgently required. Emerging evidence demonstrates that the commensal microbiota and its interactions with host immunity play pivotal roles in a variety of physiological and pathological processes, including in cancer. The gut microbiota has been identified as a potentially effective target of treatment that can be synergized with immunotherapy. The urothelial tract is also a key site for multiple microbes, although the immune-regulatory role of the urinary microbiome in the process of carcinogenesis of bladder cancer remains to be elucidated. We performed a comprehensive analysis of the expression and biological functions of C-type lectin receptors (CLRs), which have been recognized as innate pathogen-associated receptors for fungal microbiota, in bladder cancer. In line with previous research on fungal colonization of the urothelial tract, we found that CLRs, including Dectin-1, Dectin-2, Dectin-3, and macrophage-inducible Ca2+-dependent lectin receptor (Mincle), had a significant association with immune infiltration in bladder cancer. Multiple innate and adaptive pathways are positively correlated with the upregulation of CLRs. In addition, we found a significant correlation between the expression of CLRs and a range of immune-checkpoint proteins in bladder cancer. Based on previous studies and our findings, we hypothesize that the urinary mycobiome plays a key role in the pathogenesis of bladder cancer and call for more research on CLR-mediated anti-fungal immunity against bladder cancer as a novel target for immunotherapy in urothelial bladder cancer.
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Affiliation(s)
- Tianhang Li
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Tianyao Liu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Zihan Zhao
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Yuchen Pan
- State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing, China
| | - Xinyan Xu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Yulin Zhang
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Shoubin Zhan
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Shengkai Zhou
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Wenjie Zhu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Hongqian Guo
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
- *Correspondence: Rong Yang, ; Hongqian Guo,
| | - Rong Yang
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
- *Correspondence: Rong Yang, ; Hongqian Guo,
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Kustermann M, Dasari P, Knape I, Keltsch E, Liu J, Pflüger S, Osen W, Holzmann K, Huber-Lang M, Debatin KM, Strauss G. Adoptively Transferred in vitro-Generated Myeloid-Derived Suppressor Cells Improve T-Cell Function and Antigen-Specific Immunity after Traumatic Lung Injury. J Innate Immun 2022; 15:78-95. [PMID: 35691281 PMCID: PMC10643914 DOI: 10.1159/000525088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 05/07/2022] [Indexed: 11/19/2022] Open
Abstract
Immune reactions after trauma are characterized by immediate activation of innate immunity and simultaneously downregulation of adaptive immunity leading to a misbalanced immunohomeostasis and immunosuppression of the injured host. Therefore, the susceptibility to secondary infections is strongly increased after trauma. Immune responses are regulated by a network of immune cells influencing each other and at the same time modifying their functions dependent on the inflammatory environment. Although myeloid-derived suppressor cells (MDSCs) are initially described as T-cell suppressors, their immunomodulatory capacity after trauma is mostly undefined. Therefore, in vitro-generated MDSCs were adoptively transferred into mice after blunt chest trauma (TxT). A single MDSC treatment-induced splenic T-cell expansion decreased apoptosis sensitivity and improved proliferation in the absence of T-cell exhaustion until 2 weeks after trauma. MDSC treatment had a long-lasting effect on the genomic landscape of CD4+ T cells by upregulating primarily Th2-associated genes. Remarkably, immune-activating functions of MDSCs supported the ability of TxT mice to respond to post-traumatic secondary antigen challenge. Secondary insults were mimicked by immunizing MDSC-treated TxT mice with ovalbumin (OVA), followed by OVA restimulation in vitro. MDSC treatment significantly increased the frequency of OVA-specific T cells, enhanced their Th1/Th2 cytokine expression, and induced upregulation of cytolytic molecules finally improving OVA-specific cytotoxicity. Overall, we could show that therapeutic MDSC treatment after TxT improves post-traumatic T-cell functions, which might enable the traumatic host to counterbalance trauma-induced immunoparalysis.
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Affiliation(s)
- Monika Kustermann
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Prasad Dasari
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Ingrid Knape
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Emma Keltsch
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Jianing Liu
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Silvia Pflüger
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Wolfram Osen
- GMP & T Cell Therapy, German Cancer Research Center, Heidelberg, Germany
| | | | - Markus Huber-Lang
- Institute of Experimental Trauma-Immunology, University Medical Center Ulm, Ulm, Germany
| | - Klaus-Michael Debatin
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Gudrun Strauss
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
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10
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Neutrophil Functional Heterogeneity and Implications for Viral Infections and Treatments. Cells 2022; 11:cells11081322. [PMID: 35456003 PMCID: PMC9025666 DOI: 10.3390/cells11081322] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 12/15/2022] Open
Abstract
Evidence suggests that neutrophils exert specialized effector functions during infection and inflammation, and that these cells can affect the duration, severity, and outcome of the infection. These functions are related to variations in phenotypes that have implications in immunoregulation during viral infections. Although the complexity of the heterogeneity of neutrophils is still in the process of being uncovered, evidence indicates that they display phenotypes and functions that can assist in viral clearance or augment and amplify the immunopathology of viruses. Therefore, deciphering and understanding neutrophil subsets and their polarization in viral infections is of importance. In this review, the different phenotypes of neutrophils and the roles they play in viral infections are discussed. We also examine the possible ways to target neutrophil subsets during viral infections as potential anti-viral treatments.
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11
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Cannon RD. Oral Fungal Infections: Past, Present, and Future. FRONTIERS IN ORAL HEALTH 2022; 3:838639. [PMID: 35187534 PMCID: PMC8850356 DOI: 10.3389/froh.2022.838639] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 01/12/2022] [Indexed: 12/14/2022] Open
Abstract
Oral fungal infections have afflicted humans for millennia. Hippocrates (ca. 460-370 BCE) described two cases of oral aphthae associated with severe underlying diseases that could well have been oral candidiasis. While oral infections caused by other fungi such as cryptococcosis, aspergillosis, mucormycosis, histoplasmosis, blastomycosis, and coccidioidomycosis occur infrequently, oral candidiasis came to the fore during the AIDS epidemic as a sentinel opportunistic infection signaling the transition from HIV infection to AIDS. The incidence of candidiasis in immunocompromised AIDS patients highlighted the importance of host defenses in preventing oral fungal infections. A greater understanding of the nuances of human immune systems has revealed that mucosal immunity in the mouth delivers a unique response to fungal pathogens. Oral fungal infection does not depend solely on the fungus and the host, however, and attention has now focussed on interactions with other members of the oral microbiome. It is evident that there is inter-kingdom signaling that affects microbial pathogenicity. The last decade has seen significant advances in the rapid qualitative and quantitative analysis of oral microbiomes and in the simultaneous quantification of immune cells and cytokines. The time is ripe for the application of machine learning and artificial intelligence to integrate more refined analyses of oral microbiome composition (including fungi, bacteria, archaea, protozoa and viruses—including SARS-CoV-2 that causes COVID-19). This analysis should incorporate the quantification of immune cells, cytokines, and microbial cell signaling molecules with signs of oral fungal infections in order to better diagnose and predict susceptibility to oral fungal disease.
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12
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Neutrophil-suppressive activity over T-cell proliferation and fungal clearance in a murine model of Fonsecaea pedrosoi infection. Sci Rep 2021; 11:20220. [PMID: 34642440 PMCID: PMC8511260 DOI: 10.1038/s41598-021-99847-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 09/15/2021] [Indexed: 11/28/2022] Open
Abstract
Neutrophils are essential to control several fungal infections. These cells are commonly known for their pro-inflammatory activities. However, some studies have demonstrated the anti-inflammatory properties of neutrophils during certain infectious diseases, culminating in the inhibition of T cell proliferation. Chromoblastomycosis (CBM) is a deep and progressive mycosis that affects thousands of people worldwide. Although neutrophil infiltrates are observed in the lesion histopathology, the fungus can overtake the immune system response and destroy the host-infected tissue. The present study demonstrated that neutropenic animals had an increase in the IL-6 production in the spleen and liver, followed by a lower fungal burden in these organs up to 14 days of infection. Neutropenic animals also showed a lower F. pedrosoi-specific antibody production 14-days post infection and higher T-cell proliferation in the in vitro experiments after stimulation with F. pedrosoi-purified proteins. Taken together, our results suggest that the presence of regulatory neutrophils in the mouse model of F. pedrosoi infection could act favoring the spread of the fungus and the chronicity of the infection. These findings shed light on the CBM treatment, which might target neutrophil polarization as a new therapy approach to treat CBM lesions.
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13
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Villar CC, Dongari-Bagtzoglou A. Fungal diseases: Oral dysbiosis in susceptible hosts. Periodontol 2000 2021; 87:166-180. [PMID: 34463992 DOI: 10.1111/prd.12378] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The oral cavity is colonized by a large number of microorganisms that are referred to collectively as the oral microbiota. These indigenous microorganisms have evolved in symbiotic relationships with the oral mucosal immune system and are involved in maintaining homeostasis in the oral cavity. Although Candida species are commonly found in the healthy oral cavity without causing infection, these fungi can become pathogenic. Recents advances indicate that the development of oral candidiasis is driven both by Candida albicans overgrowth in a dysbiotic microbiome and by disturbances in the host's immune system. Perturbation of the oral microbiota triggered by host-extrinsic (ie, medications), host-intrinsic (ie, host genetics), and microbiome-intrinsic (ie, microbial interactions) factors may increase the risk of oral candidiasis. In this review, we provide an overview of the oral mycobiome, with a particular focus on the interactions of Candida albicans with some of the most common oral bacteria and the oral mucosal immune system. Also, we present a summary of our current knowledge of the host-intrinsic and host-extrinsic factors that can predispose to oral candidiasis.
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Affiliation(s)
- Cristina Cunha Villar
- Division of Periodontics, Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Anna Dongari-Bagtzoglou
- Department of Oral Health and Diagnostic Sciences, University of Connecticut School of Dental Medicine, Farmington, CT, USA
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14
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Wu X, Li F, Deng Y, Fan X. Analysis of the control mechanism of lung cancer of caspase recruitment domain-containing protein 9 and myeloid-derived suppressor cell in Lewis lung cancer mice model. Saudi J Biol Sci 2019; 26:2037-2042. [PMID: 31889790 PMCID: PMC6923466 DOI: 10.1016/j.sjbs.2019.09.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/21/2019] [Accepted: 09/24/2019] [Indexed: 10/27/2022] Open
Abstract
The purpose of this study was to explore the internal mechanism of lung cancer under the action of caspase recruitment domain-containing protein 9 (CARD9) and immunosuppressive cells myeloid-derived suppressor cells (MDSCs) in the Lewis lung cancer mice model. In this research, mice were selected as research objects, and the mechanism of CARD9 and immunosuppressive cells MDSCs in lung cancer was studied by experimental methods such as mRNA expression level, HE staining of tumor cells, and electron microscopy. The results showed that CARD9 regulated lung cancer by controlling the working state of immunosuppressive cells MDSCs and its downstream product indoleamine 2, 3-dioxygenase (IDO). The study confirmed the tumor regulatory mechanism of CARD9-MDSCs-NF-KB-IDO in MDSCs under tumor environment. In summary, the mechanism of CARD9 and immunosuppressive cells MDSCs in lung cancer was to achieve the goal of tumor control through the control of downstream product IDO. There are still some shortcomings in the research process, but the research results still provide some guidance for future research. Therefore, it is a research topic with practical significance.
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Affiliation(s)
- Xiaowei Wu
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical Collage of Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Fan Li
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical Collage of Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Yu Deng
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical Collage of Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Xiaowu Fan
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical Collage of Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
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15
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Esher SK, Fidel PL, Noverr MC. Candida/Staphylococcal Polymicrobial Intra-Abdominal Infection: Pathogenesis and Perspectives for a Novel Form of Trained Innate Immunity. J Fungi (Basel) 2019; 5:E37. [PMID: 31075836 PMCID: PMC6617080 DOI: 10.3390/jof5020037] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 01/10/2023] Open
Abstract
Polymicrobial sepsis is difficult to diagnose and treat and causes significant morbidity and mortality, especially when fungi are involved. In vitro, synergism between Candida albicans and various bacterial species has been described for many years. Our laboratory has developed a murine model of polymicrobial intra-abdominal infection with Candida albicans and Staphylococcus aureus, demonstrating that polymicrobial infections cause high levels of mortality, while monoinfections do not. By contrast, closely related Candida dubliniensis does not cause synergistic lethality and rather provides protection against lethal polymicrobial infection. This protection is thought to be driven by a novel form of trained innate immunity mediated by myeloid-derived suppressor cells (MDSCs), which we are proposing to call "trained tolerogenic immunity". MDSC accumulation has been described in patients with sepsis, as well as in in vivo sepsis models. However, clinically, MDSCs are considered detrimental in sepsis, while their role in in vivo models differs depending on the sepsis model and timing. In this review, we will discuss the role of MDSCs in sepsis and infection and summarize our perspectives on their development and function in the spectrum of trained innate immune protection against fungal-bacterial sepsis.
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Affiliation(s)
- Shannon K Esher
- Center of Excellence in Oral and Craniofacial Biology, School of Dentistry, Louisiana State University Health Sciences Center, New Orleans, LA 70119, USA.
- Department of Microbiology and Immunology, School of Medicine, Tulane University, New Orleans, LA 70112, USA.
| | - Paul L Fidel
- Center of Excellence in Oral and Craniofacial Biology, School of Dentistry, Louisiana State University Health Sciences Center, New Orleans, LA 70119, USA.
| | - Mairi C Noverr
- Center of Excellence in Oral and Craniofacial Biology, School of Dentistry, Louisiana State University Health Sciences Center, New Orleans, LA 70119, USA.
- Department of Microbiology and Immunology, School of Medicine, Tulane University, New Orleans, LA 70112, USA.
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16
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Heigl T, Singh A, Saez-Gimenez B, Kaes J, Van Herck A, Sacreas A, Beeckmans H, Vanstapel A, Verleden SE, Van Raemdonck DE, Verleden G, Vanaudenaerde BM, Hartl D, Vos R. Myeloid-Derived Suppressor Cells in Lung Transplantation. Front Immunol 2019; 10:900. [PMID: 31080450 PMCID: PMC6497753 DOI: 10.3389/fimmu.2019.00900] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 04/08/2019] [Indexed: 12/19/2022] Open
Abstract
Myeloid-derived suppressor cells (MDSC) are a heterogeneous group of immune cells from the myeloid lineage. MDSCs expand in pathological situations, such as chronic infection, cancer, autoimmunity, and allograft rejection. As chronic lung allograft dysfunction (CLAD) limits long-term survival after lung transplantation (LTx), MDSCs may play a role in its pathophysiology. We assessed phenotype and frequency of MDSCs in peripheral blood from lung transplant recipients and its relationship to post-transplant complications and immunosuppression. Granulocytic (G)-MDSC were identified and quantified by flow cytometry of blood from 4 control subjects and 20 lung transplant patients (stable n = 6, infection n = 5; CLAD n = 9). G-MDSC functionality was assessed in vitro by their capability to block CD4 and CD8 T cell proliferation. More G-MDSC could be assessed using EDTA tubes compared to heparin tubes (p = 0.004). G-MDSC were increased in stable lung transplant recipients vs. non-transplant controls (52.1% vs. 9.4%; p = 0.0095). The infection or CLAD groups had lower G-MDSCs vs. stable recipients (28.2%p = 0.041 and 33.0%; p = 0.088, respectively), but were not different among CLAD phenotypes. G-MDSC tended to correlate with cyclosporine A and tacrolimus levels (r2 = 0.18; r2 = 0.17). CD4 and CD8 cells proliferation decreased by 50 and 80% if co-cultured with MDSCs (1:6 and 1:2 MDSC:T-cell ratio, respectively). In conclusion, circulating MDSCs are measurable, functional and have a G-MDSC phenotype in lung transplant patients. Their frequency is increased in stable patients, decreased during post-transplant complications, and related to level of immunosuppression. This study may pave the way for further investigations of MDSC in the context of lung transplantation.
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Affiliation(s)
- Tobias Heigl
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Anurag Singh
- Universitätsklinik für Kinder-und Jugendmedizin, Tübingen, Germany
| | - Berta Saez-Gimenez
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Janne Kaes
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Anke Van Herck
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Annelore Sacreas
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Hanne Beeckmans
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Arno Vanstapel
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Stijn E Verleden
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Dirk E Van Raemdonck
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Geert Verleden
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Bart M Vanaudenaerde
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - Dominik Hartl
- Universitätsklinik für Kinder-und Jugendmedizin, Tübingen, Germany
| | - Robin Vos
- Lung Transplant Unit, Lab of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
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17
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Principi E, Raffaghello L. The role of the P2X7 receptor in myeloid-derived suppressor cells and immunosuppression. Curr Opin Pharmacol 2019; 47:82-89. [PMID: 30959357 DOI: 10.1016/j.coph.2019.02.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 12/11/2022]
Abstract
Myeloid derived suppressor cells (MDSC) are a heterogeneous population of immature myeloid cells expanded and recruited from the bone marrow to the periphery or to a specific site of inflammation/infection. MDSC have been described in different pathological conditions including cancer, infections, autoimmunity and obesity. The main function of MDSC is immunosuppression occurring through different mechanisms such as induction of immunosuppressive cells, impairment of lymphocyte homing, free radical production, depletion of amino acids critical for T cell functions, upregulation of ectoenzymes involved in adenosine production and activation of immune regulatory molecules responsible of T cell anergy. A novel immunosuppressive mechanism MDSC-mediated involves the ATP/P2X7 receptor axis that induces the release of immunosuppressive chemokines/cytokines upon triggering with ATP.
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Affiliation(s)
- Elisa Principi
- Stem Cell Laboratory and Cell Therapy Center, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Lizzia Raffaghello
- Stem Cell Laboratory and Cell Therapy Center, IRCCS Istituto Giannina Gaslini, Genova, Italy; Center of Translational and Experimental Myology, IRCCS Istituto Giannina Gaslini, Genova, Italy.
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18
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Dorhoi A, Glaría E, Garcia-Tellez T, Nieuwenhuizen NE, Zelinskyy G, Favier B, Singh A, Ehrchen J, Gujer C, Münz C, Saraiva M, Sohrabi Y, Sousa AE, Delputte P, Müller-Trutwin M, Valledor AF. MDSCs in infectious diseases: regulation, roles, and readjustment. Cancer Immunol Immunother 2019; 68:673-685. [PMID: 30569204 PMCID: PMC11028159 DOI: 10.1007/s00262-018-2277-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 10/29/2018] [Indexed: 12/24/2022]
Abstract
Many pathogens, ranging from viruses to multicellular parasites, promote expansion of MDSCs, which are myeloid cells that exhibit immunosuppressive features. The roles of MDSCs in infection depend on the class and virulence mechanisms of the pathogen, the stage of the disease, and the pathology associated with the infection. This work compiles evidence supported by functional assays on the roles of different subsets of MDSCs in acute and chronic infections, including pathogen-associated malignancies, and discusses strategies to modulate MDSC dynamics to benefit the host.
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Affiliation(s)
- Anca Dorhoi
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer 10, 17493, Greifswald, Insel Riems, Germany.
- Faculty of Mathematics and Natural Sciences, University of Greifswald, Greifswald, Germany.
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany.
| | - Estibaliz Glaría
- Nuclear Receptor Group, Department of Cell Biology, Physiology and Immunology, School of Biology, University of Barcelona, Av. Diagonal, 643, 3rd floor, 08028, Barcelona, Spain
- Institute of Biomedicine of the University of Barcelona (IBUB), Barcelona, Spain
| | | | | | - Gennadiy Zelinskyy
- Institute of Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Benoit Favier
- Immunology of Viral Infections and Autoimmune Diseases (IMVA), IDMIT Department, CEA, Université Paris Sud 11, INSERM U1184, IBJF, Fontenay-aux-Roses, France
| | - Anurag Singh
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen, Tübingen, Germany
| | - Jan Ehrchen
- Department of Dermatology, University Hospital Münster, Münster, Germany
| | - Cornelia Gujer
- Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zurich, Switzerland
| | - Christian Münz
- Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zurich, Switzerland
| | - Margarida Saraiva
- i3S-Instituto de Investigação e Inovação em Saúde, Porto, Portugal
- IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Yahya Sohrabi
- Molecular and Translational Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Ana E Sousa
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Peter Delputte
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | | | - Annabel F Valledor
- Nuclear Receptor Group, Department of Cell Biology, Physiology and Immunology, School of Biology, University of Barcelona, Av. Diagonal, 643, 3rd floor, 08028, Barcelona, Spain.
- Institute of Biomedicine of the University of Barcelona (IBUB), Barcelona, Spain.
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19
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Medina E, Hartl D. Myeloid-Derived Suppressor Cells in Infection: A General Overview. J Innate Immun 2018; 10:407-413. [PMID: 29945134 DOI: 10.1159/000489830] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 04/23/2018] [Indexed: 01/09/2023] Open
Abstract
After initial infection, the immune response that serves to restrict the invading pathogen needs to be tightly calibrated in order to avoid collateral immunopathological damage. This calibration is performed by specialized suppressor mechanisms, which are capable of dampening overwhelming or unremitting inflammation in order to prevent tissue damage. Myeloid-derived suppressor cells (MDSC) are emerging as key players in counter-balancing inflammatory responses and pathogenesis during infection. However, some pathogens are able to exploit the suppressive activities of MDSC to favor pathogen persistence and chronic infections. In this article, we review the current knowledge about the importance of MDSC in the context of bacterial, virus, parasites, and fungal infections.
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Affiliation(s)
- Eva Medina
- Helmholtz Centre for Infection Research, Infection Immunology Research Group, Braunschweig,
| | - Dominik Hartl
- Children's Hospital, University of Tübingen, Tübingen, Germany
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20
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Goyal S, Castrillón-Betancur JC, Klaile E, Slevogt H. The Interaction of Human Pathogenic Fungi With C-Type Lectin Receptors. Front Immunol 2018; 9:1261. [PMID: 29915598 PMCID: PMC5994417 DOI: 10.3389/fimmu.2018.01261] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/18/2018] [Indexed: 01/19/2023] Open
Abstract
Fungi, usually present as commensals, are a major cause of opportunistic infections in immunocompromised patients. Such infections, if not diagnosed or treated properly, can prove fatal. However, in most cases healthy individuals are able to avert the fungal attacks by mounting proper antifungal immune responses. Among the pattern recognition receptors (PRRs), C-type lectin receptors (CLRs) are the major players in antifungal immunity. CLRs can recognize carbohydrate ligands, such as β-glucans and mannans, which are mainly found on fungal cell surfaces. They induce proinflammatory immune reactions, including phagocytosis, oxidative burst, cytokine, and chemokine production from innate effector cells, as well as activation of adaptive immunity via Th17 responses. CLRs such as Dectin-1, Dectin-2, Mincle, mannose receptor (MR), and DC-SIGN can recognize many disease-causing fungi and also collaborate with each other as well as other PRRs in mounting a fungi-specific immune response. Mutations in these receptors affect the host response and have been linked to a higher risk in contracting fungal infections. This review focuses on how CLRs on various immune cells orchestrate the antifungal response and on the contribution of single nucleotide polymorphisms in these receptors toward the risk of developing such infections.
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Affiliation(s)
- Surabhi Goyal
- Institute for Microbiology and Hygiene, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Juan Camilo Castrillón-Betancur
- Septomics Research Center, Jena University Hospital, Jena, Germany.,International Leibniz Research School for Microbial and Biomolecular Interactions, Leibniz Institute for Natural Product Research and Infection Biology/Hans Knöll Institute, Jena, Germany
| | - Esther Klaile
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Hortense Slevogt
- Septomics Research Center, Jena University Hospital, Jena, Germany
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21
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Myeloid-derived suppressor cells coming of age. Nat Immunol 2018; 19:108-119. [PMID: 29348500 DOI: 10.1038/s41590-017-0022-x] [Citation(s) in RCA: 1206] [Impact Index Per Article: 201.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/07/2017] [Indexed: 02/07/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of cells generated during a large array of pathologic conditions ranging from cancer to obesity. These cells represent a pathologic state of activation of monocytes and relatively immature neutrophils. MDSCs are characterized by a distinct set of genomic and biochemical features, and can, on the basis of recent findings, be distinguished by specific surface molecules. The salient feature of these cells is their ability to inhibit T cell function and thus contribute to the pathogenesis of various diseases. In this Review, we discuss the origin and nature of these cells; their distinctive features; and their biological roles in cancer, infectious diseases, autoimmunity, obesity and pregnancy.
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22
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Dorhoi A, Du Plessis N. Monocytic Myeloid-Derived Suppressor Cells in Chronic Infections. Front Immunol 2018; 8:1895. [PMID: 29354120 PMCID: PMC5758551 DOI: 10.3389/fimmu.2017.01895] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/11/2017] [Indexed: 01/04/2023] Open
Abstract
Heterogeneous populations of myeloid regulatory cells (MRC), including monocytes, macrophages, dendritic cells, and neutrophils, are found in cancer and infectious diseases. The inflammatory environment in solid tumors as well as infectious foci with persistent pathogens promotes the development and recruitment of MRC. These cells help to resolve inflammation and establish host immune homeostasis by restricting T lymphocyte function, inducing regulatory T cells and releasing immune suppressive cytokines and enzyme products. Monocytic MRC, also termed monocytic myeloid-derived suppressor cells (M-MDSC), are bona fide phagocytes, capable of pathogen internalization and persistence, while exerting localized suppressive activity. Here, we summarize molecular pathways controlling M-MDSC genesis and functions in microbial-induced non-resolved inflammation and immunopathology. We focus on the roles of M-MDSC in infections, including opportunistic extracellular bacteria and fungi as well as persistent intracellular pathogens, such as mycobacteria and certain viruses. Better understanding of M-MDSC biology in chronic infections and their role in antimicrobial immunity, will advance development of novel, more effective and broad-range anti-infective therapies.
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Affiliation(s)
- Anca Dorhoi
- Institute of Immunology, Bundesforschungsinstitut für Tiergesundheit, Friedrich-Loeffler-Institut (FLI), Insel Riems, Germany.,Faculty of Mathematics and Natural Sciences, University of Greifswald, Greifswald, Germany.,Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Nelita Du Plessis
- Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, SAMRC Centre for Tuberculosis Research, DST and NRF Centre of Excellence for Biomedical TB Research, Stellenbosch University, Tygerberg, South Africa
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