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Pan Z, Li M, Zhang P, Li T, Liu R, Liu J, Liu S, Zhang Y. Peripheral Blood Lymphocyte Subsets and Heterogeneity of B Cell Subsets in Patients of Idiopathic Inflammatory Myositis with Different Myositis-specific Autoantibodies. Inflammation 2024:10.1007/s10753-024-02052-z. [PMID: 38755405 DOI: 10.1007/s10753-024-02052-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/08/2024] [Accepted: 05/10/2024] [Indexed: 05/18/2024]
Abstract
Idiopathic inflammatory myopathies (IIM) are a group of myopathies that present with muscle weakness and multiple extra-muscular manifestations, in which lymphocytes play central roles in myositis pathogenesis. This study aimed to explore the clinical characteristics of lymphocyte subsets, especially B cell subsets, in patients with IIM. Our study included 176 patients with active IIM and 210 gender/age-matched healthy controls (HCs). Compared to HCs, patients have reduced counts of T cells, B cells, and natural killer cells. In addition, B cell subsets from 153 patients with IIM and 92 HCs were characterized. Patients had a lower percentage of memory B cells and translational memory B cells, while those patients were with an elevated percentage of CD19+ B cells, plasmablast and naïve B cells compared with HCs. Moreover, to further explore the heterogeneity of B cells in IIM, patients were categorized into three clusters based on clustering analysis. Cluster 1 was dominated by CD19+ B cells, Bregs and naïve B cells, cluster 3 was dominated by memory B cells and plasmablast, and cluster 2 had the highest proportion of translational memory B cells. Notably, patients in cluster 1 presented with higher CK levels, indicating muscle damage, whereas patients in cluster 3 showed a higher incidence of chest tightness. Our study indicated that lymphopenia is a common manifestation in patients with IIM. B cell subsets are abnormally expressed and showed high heterogeneity in patients with IIM. The patients with IIM were divided into three different clusters with different percentages of chest tightness and distinct CK levels.
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Affiliation(s)
- Zhou Pan
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Mengdi Li
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Department of Rheumatology and Clinical Immunology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Panpan Zhang
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Tianqi Li
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Rui Liu
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jia Liu
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shengyun Liu
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China.
| | - Yusheng Zhang
- Department of Rheumatology and Clinical Immunology, The first affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Ren FP, Chen Q, Yao SS, Feng L, Xue XY, Zhao WC, Wang D, Zhao ZL, Gu SW, Li T, Shen YW, Gao L, Zang XL, Bao XY, Tong ZH. Characteristics and prognostic implications of peripheral blood lymphocyte subsets in patients with anti-MDA5 antibody positive dermatomyositis-interstitial lung disease. BMC Pulm Med 2023; 23:411. [PMID: 37898737 PMCID: PMC10612305 DOI: 10.1186/s12890-023-02706-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/11/2023] [Indexed: 10/30/2023] Open
Abstract
OBJECTIVES To examine the characteristics of blood lymphocyte subsets in dermatomyositis-interstitial lung disease (DM-ILD) inflicted patients with positive anti-melanoma differentiation-associated gene 5 (anti-MDA5), as well as its prognosis value in this set of patients. METHODS Data were retrospectively collected from 253 DM-ILD patients from three hospitals in China between January 2016 to January 2021. Patients were grouped into anti-MDA5 antibody positive group (MDA5+ DM-ILD) and anti-MDA5 antibody negative group (MDA5- DM-ILD) based on myositis-specific autoantibody test results. Demographic characteristics, lymphocyte subsets patterns and other clinical features were compared between the two groups. The association of lymphocyte subsets with 180-day mortality was investigated using survival analysis in MDA5+ DM-ILD. RESULTS Out of 253 eligible patients with DM-ILD, 59 patients were anti-MDA5+ and 194 were anti-MDA5-. Peripheral blood lymphocyte count, CD3+ count, percentage of CD3+, CD3+CD4+ count, and CD3+CD8+ count was lower in MDA5+ DM-ILD than in MDA5- DM-ILD- (all P < 0.001) as well as CD3-CD19+ count (P = 0.04). In MDA5+ DM-ILD, CD3+CD8+ count ≤ 49.22 cell/μL (HR = 3.81, 95%CI [1.20,12.14]) and CD3-CD19+ count ≤ 137.64 cell/μL (HR = 3.43, 95%CI [1.15,10.24]) were independent predictors of mortality. CD3+CD8+ count ≤ 31.38 cell/μL was associated with a higher mortality risk in all DM-ILD patients (HR = 8.6, 95%CI [2.12,31.44]) after adjusting for anti-MDA5 and other clinical characteristics. CONCLUSION Significant lymphocytes decrease was observed in MDA5+ DM-ILD patients. CD3+CD8+ cell count was associated with worse prognosis in both MDA5+ DM-ILD and all DM-ILD patients.
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Affiliation(s)
- Fang-Ping Ren
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Qi Chen
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | | | - Lin Feng
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xin-Ying Xue
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Wei-Chao Zhao
- PLA Strategic Support Force Medical Center, Beijing, China
| | - Dong Wang
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Zhi-Ling Zhao
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Si-Wei Gu
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ting Li
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Ya-Wen Shen
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Lan Gao
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Xue-Lei Zang
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | | | - Zhao-Hui Tong
- Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
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Razizadeh MH, Zafarani A, Taghavi-Farahabadi M, Khorramdelazad H, Minaeian S, Mahmoudi M. Natural killer cells and their exosomes in viral infections and related therapeutic approaches: where are we? Cell Commun Signal 2023; 21:261. [PMID: 37749597 PMCID: PMC10519079 DOI: 10.1186/s12964-023-01266-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/11/2023] [Indexed: 09/27/2023] Open
Abstract
Innate immunity is the first line of the host immune system to fight against infections. Natural killer cells are the innate immunity lymphocytes responsible for fighting against virus-infected and cancerous cells. They have various mechanisms to suppress viral infections. On the other hand, viruses have evolved to utilize different ways to evade NK cell-mediated responses. Viruses can balance the response by regulating the cytokine release pattern and changing the proportion of activating and inhibitory receptors on the surface of NK cells. Exosomes are a subtype of extracellular vesicles that are involved in intercellular communication. Most cell populations can release these nano-sized vesicles, and it was shown that these vesicles produce identical outcomes to the originating cell from which they are released. In recent years, the role of NK cell-derived exosomes in various diseases including viral infections has been highlighted, drawing attention to utilizing the therapeutic potential of these nanoparticles. In this article, the role of NK cells in various viral infections and the mechanisms used by viruses to evade these important immune system cells are initially examined. Subsequently, the role of NK cell exosomes in controlling various viral infections is discussed. Finally, the current position of these cells in the treatment of viral infections and the therapeutic potential of their exosomes are reviewed. Video Abstract.
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Affiliation(s)
- Mohammad Hossein Razizadeh
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Alireza Zafarani
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahsa Taghavi-Farahabadi
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Khorramdelazad
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Department of Immunology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Sara Minaeian
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Mahmoudi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Immunology Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran.
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Bernit E, Jean E, Marlot B, Laget L, Izard C, Dettori I, Beley S, Gautier I, Agouti I, Frassati C, Pedini P, Picard C, Paganini J, Chiaroni J, Di Cristofaro J. HLA-F and LILRB1 Genetic Polymorphisms Associated with Alloimmunisation in Sickle Cell Disease. Int J Mol Sci 2023; 24:13591. [PMID: 37686397 PMCID: PMC10487752 DOI: 10.3390/ijms241713591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/25/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
Red blood cell (RBC) transfusion remains a critical component in caring for the acute and chronic complications of sickle cell disease (SCD). Patient alloimmunisation is the main limitation of transfusion, which can worsen anaemia and lead to delayed haemolytic transfusion reaction or transfusion deadlock. Although biological risk factors have been identified for immunisation, patient alloimmunisation remains difficult to predict. We aimed to characterise genetic alloimmunisation factors to optimise the management of blood products compatible with extended antigen matching to ensure the self-sufficiency of labile blood products. Considering alloimmunisation in other clinical settings, like pregnancy and transplantation, many studies have shown that HLA Ib molecules (HLA-G, -E, and -F) are involved in tolerance mechanism; these molecules are ligands of immune effector cell receptors (LILRB1, LILRB2, and KIR3DS1). Genetic polymorphisms of these ligands and receptors have been linked to their expression levels and their influence on inflammatory and immune response modulation. Our hypothesis was that polymorphisms of HLA Ib genes and of their receptors are associated with alloimmunisation susceptibility in SCD patients. The alloimmunisation profile of thirty-seven adult SCD patients was analysed according to these genetic polymorphisms and transfusion history. Our results suggest that the alloimmunisation of SCD patients is linked to both HLA-F and LILRB1 genetic polymorphisms located in their regulatory region and associated with their protein expression level.
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Affiliation(s)
- Emmanuelle Bernit
- Unité Transversale de la Drépanocytose, Centre de Référence Antilles-Guyane pour la Drépanocytose, les Thalassémies et les Maladies Constitutives du Globule Rouge et de l’Erythropoïèse, CHU Guadeloupe, 97110 Pointe à Pitre, France
| | - Estelle Jean
- Centre de Référence pour la Drépanocytose, les Thalassémies et les Maladies Constitutives du Globule Rouge et de l’Erythropoïèse, Assistance Publique des Hôpitaux de Marseille, 13005 Marseille, France
| | - Bastien Marlot
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
| | - Laurine Laget
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Caroline Izard
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Isabelle Dettori
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Sophie Beley
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
| | - Isabelle Gautier
- Centre de Référence pour la Drépanocytose, les Thalassémies et les Maladies Constitutives du Globule Rouge et de l’Erythropoïèse, Assistance Publique des Hôpitaux de Marseille, 13005 Marseille, France
| | - Imane Agouti
- Centre de Référence pour la Drépanocytose, les Thalassémies et les Maladies Constitutives du Globule Rouge et de l’Erythropoïèse, Assistance Publique des Hôpitaux de Marseille, 13005 Marseille, France
| | - Coralie Frassati
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Pascal Pedini
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Christophe Picard
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | | | - Jacques Chiaroni
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
| | - Julie Di Cristofaro
- UMR7268, ADES, EFS, CNRS, Aix Marseille University, 13003 Marseille, France
- Etablissement Français du Sang PACA Corse, 13001 Marseille, France
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Abstract
RSV is a leading cause of respiratory tract disease in infants and the elderly. RSV has limited therapeutic interventions and no FDA-approved vaccine. Gaps in our understanding of virus-host interactions and immunity contribute to the lack of biological countermeasures. This review updates the current understanding of RSV immunity and immunopathology with a focus on interferon responses, animal modeling, and correlates of protection.
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6
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Abstract
Natural killer cells, one of the important types of innate immune cells, play a pivotal role in the antiviral process in vivo. It has been shown that increasing NK cell activity may promote the alleviation of viral infections, even severe infection-induced sepsis. Given the current state of the novel coronavirus (SARS-CoV-2) global pandemic, clarifying the anti-viral function of NK cells would be helpful for revealing the mechanism of host immune responses and decipher the progression of COVID-19 and providing important clues for combating this pandemic. In this review, we summarize the roles of NK cells in viral infection and sepsis as well as the potential possibilities of NK cell-based immunotherapy for treating COVID-19.
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Affiliation(s)
- Lu Ma
- The Hengyang Key Laboratory of Cellular Stress Biology, Institute of Cytology and Genetics, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Qi Li
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Suna Cai
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Hourong Peng
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Ting Huyan
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Hui Yang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
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7
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Abstract
Natural killer cells play a vital role in the rejection of tumors and pathogen-infected cells. NK cells are indispensable in the early immune response against viral infections by directly targeting infected cells. Furthermore, NK cells influence adaptive immunity by driving virus-specific T-cell responses. Respiratory syncytial virus, a highly contagious virus that causes bronchiolitis, is the main reason for mortality in infants and elderly patients. RSV infection triggers both innate and adaptive immune responses. However, immunity against RSV is ephemeral due to the impaired development of immunological memory. The role of NK cells during RSV infection remains ambiguous. NK cells play a dual role in RSV infection; initially, their role is a protective one as they utilize their intrinsic cytotoxicity, followed by a detrimental one that induces lung injury due to the inhibition of antibody responses and the secretion of pro-inflammatory factors. Noteworthy, IFN-γ released from NK cells play a critical role in promoting a shift to adaptive responses and inhibiting antibody responses in neonates. Indeed, NK cells have a pro-inflammatory and inhibitory role rather than a cytotoxic one that contributes to the severity of the disease. Therapeutic options, including DNA-protein-based vaccines, synthetic peptides, and attenuated strains, are presently under tests. However, there is a need for effective strategies to augment NK cell activity and circumvent the pro-inflammatory activity to benefit the host. In this review, we focused on the role played by NK cells in the immune response and its outcome on the immunopathogenesis of RSV disease.
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Affiliation(s)
- Rauf Bhat
- Virology Research Group, Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed A Farrag
- Virology Research Group, Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Fahad N Almajhdi
- Virology Research Group, Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
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8
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Cadena-Mota S, Monsiváis-Urenda A, Salgado-Bustamante M, Monjarás-Ávila C, Bernal-Silva S, Aranda-Romo S, Noyola DE. Effect of cytomegalovirus infection and leukocyte immunoglobulin like receptor B1 polymorphisms on receptor expression in peripheral blood mononuclear cells. Microbiol Immunol 2019; 62:755-762. [PMID: 30461037 DOI: 10.1111/1348-0421.12661] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/25/2018] [Accepted: 11/13/2018] [Indexed: 12/20/2022]
Abstract
Leukocyte immunoglobulin like receptor B1 (LILRB1) plays a significant role in a number of infectious, autoimmune, cardiovascular, and oncologic disorders. LILRB1 expression varies between individuals and may be associated with polymorphisms on the regulatory region of the LILRB1 gene, as well as to previous cytomegalovirus infection. In this study, the contribution of these two factors to LILRB1 expression in peripheral blood mononuclear cells of healthy young adults was analyzed. LILRB1 expression in NK cells, T cells, B cells and monocytes was significantly stronger in individuals who had had cytomegalovirus infection than in those who had not (P < 0.001, P < 0.001, P < 0.01, and P < 0.001, respectively). Overall, no differences in LILRB1 expression were observed between individuals with and without GAA haplotypes of the LILRB1 regulatory region. However, when analyzed according to cytomegalovirus infection status, significant differences in LILRB1+ NK cells were observed. A higher proportion of LILRB1+ cells was found in GAA+ than in GAA- individuals who had not been infected (P < 0.01), whereas GAA- individuals had a larger proportion of LILRB1+ cells than GAA+ individuals who were cytomegalovirus positive (P < 0.01). In conclusion, cytomegalovirus infection has a major effect on LILRB1 expression in NK and other mononuclear cells and polymorphisms in the LILRB1 regulatory region appear to have a modulatory influence over this effect.
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Affiliation(s)
- Sandra Cadena-Mota
- Faculty of Medicine, Microbiology Department, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico
| | - Adriana Monsiváis-Urenda
- Faculty of Medicine, Department of Immunology, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico.,Research Center for Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, 550 Sierra Leona Avenue, Lomas 2da Sección, 78210 San Luis Potosí, Mexico
| | - Mariana Salgado-Bustamante
- Faculty of Medicine, Department of Biochemistry, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico
| | - César Monjarás-Ávila
- Faculty of Medicine, Microbiology Department, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico
| | - Sofía Bernal-Silva
- Faculty of Medicine, Microbiology Department, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico.,Research Center for Health Sciences and Biomedicine, Autonomous University of San Luis Potosí, 550 Sierra Leona Avenue, Lomas 2da Sección, 78210 San Luis Potosí, Mexico
| | - Saray Aranda-Romo
- Faculty of Dentistry, Biochemistry, Microbiology, and Pathology Laboratory, Autonomous University of San Luis Potosí, 2 Dr. Manuel Nava Avenue, Zona Universitaria, 78290 San Luis Potosí, Mexico
| | - Daniel E Noyola
- Faculty of Medicine, Microbiology Department, Autonomous University of San Luis Potosí, 2405 Venustiano Carranza Avenue, Colonia los Filtros, 78210 San Luis Potosí, Mexico
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Abstract
Respiratory syncytial virus (RSV) is a very frequent viral respiratory pathogen of the young (<5 years old) with a significant portion of young toddlers having been infected before 2 years of age. Although we understand that some of the morbidity associated with RSV in neonates is due to immunological maturation that favors immunosuppression over antiviral innate and/or adaptive immune responses, the rapid development of the immune system right after birth suggests that each age group (newborn, early infant, older infant, toddler, and older) may respond to the virus in different ways. In this study, we summarize the morbidity associated with infection in young children in the context of immunological maturation of monocytes/macrophages and the ramifications for poor innate control of viral pathogenesis. We also summarize key mechanisms that contribute to the diminished antiviral innate immune responses of these young children.
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Affiliation(s)
- David Verhoeven
- Veterinary Microbiology and Preventative Medicine, Iowa State University, Ames , Iowa
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Abstract
Respiratory syncytial virus (RSV) is an important etiological agent of respiratory infections, particularly in children. Much information regarding the immune response to RSV comes from animal models and in vitro studies. Here, we provide a comprehensive description of the human immune response to RSV infection, based on a systematic literature review of research on infected humans. There is an initial strong neutrophil response to RSV infection in humans, which is positively correlated with disease severity and mediated by interleukin-8 (IL-8). Dendritic cells migrate to the lungs as the primary antigen-presenting cell. An initial systemic T-cell lymphopenia is followed by a pulmonary CD8+ T-cell response, mediating viral clearance. Humoral immunity to reinfection is incomplete, but RSV IgG and IgA are protective. B-cell-stimulating factors derived from airway epithelium play a major role in protective antibody generation. Gamma interferon (IFN-γ) has a strongly protective role, and a Th2-biased response may be deleterious. Other cytokines (particularly IL-17A), chemokines (particularly CCL-5 and CCL-3), and local innate immune factors (including cathelicidins and IFN-λ) contribute to pathogenesis. In summary, neutrophilic inflammation is incriminated as a harmful response, whereas CD8+ T cells and IFN-γ have protective roles. These may represent important therapeutic targets to modulate the immunopathogenesis of RSV infection.
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Affiliation(s)
- Clark D Russell
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Stefan A Unger
- Department of Child Life and Health, University of Edinburgh, Edinburgh, UK
| | - Marc Walton
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Jürgen Schwarze
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Department of Child Life and Health, University of Edinburgh, Edinburgh, UK
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