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Source: Frontiers in Immunology

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Total 269 results found since Jan 2013.

Scurfy Mice Develop Features of Connective Tissue Disease Overlap Syndrome and Mixed Connective Tissue Disease in the Absence of Regulatory T Cells
Discussion Treg represent a lineage of T cells which play a fundamental role in maintaining humoral tolerance in the periphery. This subset of “suppressor T cells” is identified as FoxP3-expressing CD4+ T cells (16, 17). The unrestrained expression of FoxP3 is essential for the development and function of Treg (4). Accordingly, a disruption of the Foxp3 gene in scurfy mice results in an autoimmune lymphoproliferative disorder with fatal multi-organ inflammation (18). Since the causative mutation occurs in orthologous genes, the scurfy phenotype is indicated as the murine equivalent of the human IPEX sy...
Source: Frontiers in Immunology - April 23, 2019 Category: Allergy & Immunology Source Type: research

The Impact of Hyperosmolality on Activation and Differentiation of B Lymphoid Cells
This study was carried out in accordance with the German Law on Care and Use of Laboratory Animals. Euthanasia and organ preparation were approved by the local authorities (Landratsamt Erlangen-Hoechstadt, Erlangen, Germany). Author Contributions LC designed the study, planned, and performed experiments, analyzed and interpreted data and wrote the manuscript. SP designed the study, interpreted data, and edited the manuscript. JT initiated the study and supported the work. H-MJ made key suggestions, assisted in the design of experiments, interpreted data and critically reviewed the manuscript. WS designed the study, plann...
Source: Frontiers in Immunology - April 17, 2019 Category: Allergy & Immunology Source Type: research

The Emerging Epigenetic Role of CD8+T Cells in Autoimmune Diseases: A Systematic Review
The Emerging Epigenetic Role of CD8+T Cells in Autoimmune Diseases: A Systematic Review Qiancheng Deng1, Yangyang Luo1,2, Christopher Chang3, Haijing Wu1, Yan Ding4* and Rong Xiao1* 1Hunan Key Laboratory of Medical Epigenetics, Department of Dermatology, The Second Xiangya Hospital, Central South University, Changsha, China 2Department of Dermatology, Hunan Children's Hospital, Changsha, China 3Division of Rheumatology, Allergy and Clinical Immunology, University of California, Davis, Davis, CA, United States 4Department of Dermatology, Hainan Provincial Dermatology Disease Hospital, Haikou, China A...
Source: Frontiers in Immunology - April 17, 2019 Category: Allergy & Immunology Source Type: research

From “Serum Sickness” to “Xenosialitis”: Past, Present, and Future Significance of the Non-human Sialic Acid Neu5Gc
Conclusions and Perspectives In this review, we have discussed important milestones from the early description of “Serum-sickness” as being due to antibodies directed against Neu5Gc epitopes all the way to the present-day therapeutic implications of these antibodies in cancer therapy. Some of these milestones have been represented in a concise timeline (Figure 6). While the “Xenosialitis” hypothesis is well-supported in the human-like mouse models, it has yet to be conclusively proven in humans. It remains to be seen if “Xenosialitis” plays a role in other uniquely-human dis...
Source: Frontiers in Immunology - April 16, 2019 Category: Allergy & Immunology Source Type: research

ST18 Enhances PV-IgG-Induced Loss of Keratinocyte Cohesion in Parallel to Increased ERK Activation
Discussions Autoantibodies targeting Dsg1 and Dsg3 are pathogenic and cause blister formation by inducing structural desmosomal changes in the skin of PV patients (42). However, the mechanisms underlying disease development and the factors enhancing its manifestation have not yet been fully elucidated. Secondary factors promoting severity of the disease include non-Dsg antibodies (43) as well as genetic alterations such as recently reported ST18 SNPs (29–31) and may also entail keratinocyte-derived cytokine release. Here, we investigate the effect of ST18 overexpression and cytokine secretion on PV-IgG mediated l...
Source: Frontiers in Immunology - April 16, 2019 Category: Allergy & Immunology Source Type: research

Group 2 Innate Lymphoid Cells Are Redundant in Experimental Renal Ischemia-Reperfusion Injury
In this study, we sought to further characterize ILC2s in the kidney, their location within this organ and determine their functional role in IRI using a loss-of-function approach. Here, we found that kidney ILC2s constitutively express IL-5 and are primarily located in close proximity to the renal vasculature, within the adventitia. Additionally, we demonstrate that a reduction, deficiency or depletion of ILC2s had minimal impact on the severity of IRI. Whilst activation of ILC2s and the associated amplification of local type 2 immunity has been previously shown to reduce the deleterious consequences of AKI, our results r...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Cellular Immune Function in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)
This study was carried out in accordance with the recommendations of The London School of Hygiene & Tropical Medicine (LSHTM) Research Ethics Committee (Ref. 6123) and the National Research Ethics Service (NRES) London-Bloomsbury Research Ethics Committee (REC ref. 11/10/1760, IRAS ID: 77765), with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the LSHTM Research Ethics Committee and the NRES London-Bloomsbury Research Ethics Committee. Author Contributions JC, HD, LN, EL, and ER devised the study ...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Altered Lipidome Composition Is Related to Markers of Monocyte and Immune Activation in Antiretroviral Therapy Treated Human Immunodeficiency Virus (HIV) Infection and in Uninfected Persons
Conclusions: The lipidome is altered in ART-treated HIV infection, and may contribute to inflammation and CVD progression. Detailed lipidomic analyses may better assess CVD risk in both HIV+ and HIV– individuals than does traditional lipid profiling. Introduction Both HIV infection and the use of antiretroviral therapy (ART) contribute to an increased risk for cardiovascular disease (CVD) (1, 2). Dyslipidemia is observed in HIV-infected (HIV+) individuals, and is associated with reduced levels of high-density lipoprotein (HDL) cholesterol, and elevated total (TC) cholesterol, low-density lipoprotein (...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

IL-33 Mediated Inflammation in Chronic Respiratory Diseases —Understanding the Role of the Member of IL-1 Superfamily
Conclusion Analysis of the pleiotropic effects of IL-33 on multiple immunological cells (macrophages, mastocytes), as well as neurological cells of medulla oblongata, dorsal root ganglion, antigen-induced arthritis system, carrageen, and formalin, shows that this alarmin plays curtail, yet not fully known role in mediating inflammation, especially in chronic inflammatory pulmonary diseases such as asthma, COPD, and OSA. Taken into consideration the engagement in this process, in particular of mastocytes and their secretion of CXCL2, 4, 8, and other cytokines, there is no doubt regarding the etiopathogenic role of IL-33 in...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

A Systematic Review on Predisposition to Lymphoid (B and T cell) Neoplasias in Patients With Primary Immunodeficiencies and Immune Dysregulatory Disorders (Inborn Errors of Immunity)
Conclusions Though this is not a comprehensive summary of malignancies in PIDDs, or even lymphoproliferative disease in this area, this review summarizes the Medline-indexed published reports of B and T lymphomas in patients with PIDDs. This report highlights the diversity of malignant lymphoproliferative disorders in setting of PIDDs, and its associated challenges of diagnosis and treatment. The pathological classification and nomenclature for the lymphoid malignancies with variably reported and postulated underlying mechanisms were inconsistent and inadequate for many of these published reports. A wide range of treatmen...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Autophagy Limits Inflammasome During Chlamydia pneumoniae Infection
In this study we found blocking autophagy led to increased CP growth in both macrophages and mouse embryonic fibroblasts. In vivo, loss of the autophagy elongation component ATG16L1 specifically in myeloid cells led to increased mortality in response to CP infection, characterized by greater numbers of neutrophils and dendritic cells, but no change in the CP burden in the lungs. This was accompanied by an increase in inflammasome-active macrophages and IL-1β production. While induction of autophagy in macrophages led to reduced CP growth in vitro, in vivo treatment with rapamycin led to increased mortality of infec...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research

ALCAM Mediates DC Migration Through Afferent Lymphatics and Promotes Allospecific Immune Reactions
In conclusion, our findings identify ALCAM as a novel therapeutic target for preventing corneal allograft rejection in high-risk patient populations. Moreover, given the documented contribution of ALCAM to (lymph)angiogenesis, DC migration, and T cell activation, ALCAM blockade might represent a therapeutic strategy for treating other immune-mediated inflammatory conditions, such as solid organ transplant rejection, allergy or autoimmune diseases. Experimental Procedures Cloning, Expression, and Purification of I/F8-Fc and KSF-Fc For cloning of I/F8-Fc and KSF-Fc the respective scFv sequence was amplified from previousl...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research

The Antidepressant Mirtazapine Inhibits Hepatic Innate Immune Networks to Attenuate Immune-Mediated Liver Injury in Mice
Conclusion: Our data suggest that mirtazapine can attenuate hepatic innate immune responses that critically regulate the subsequent development of autoimmune liver injury. Therefore, given that it is a safe and widely used medication, mirtazapine may represent a novel therapeutic approach to autoimmune liver disease. Introduction Classically, autoimmune disease was considered a disorder of adaptive immunity (1). However, early innate immune responses are clearly important for driving subsequent adaptive immune responses in autoimmunity. In numerous autoimmune disease models, activation of resident tissue macrophages,...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research

P38 and JNK Mitogen-Activated Protein Kinases Interact With Chikungunya Virus Non-structural Protein-2 and Regulate TNF Induction During Viral Infection in Macrophages
This study has been funded by the Council of Scientific and Industrial Research (CSIR), New Delhi, India, vide grant no 37 (1542)/12/EMR-II and Department of Science and Technology (DST-SERB), New Delhi, India, vide grant no EMR/2016/000854. It was also supported by Institute of life sciences, Bhubaneswar, under Department of Biotechnology and National Institute of Science Education and Research (NISER), Bhubaneswar, under Department of Atomic Energy (DAE), Government of India. Conflict of Interest Statement The authors declare that the research was conducted in the absence of any commercial or financial relationships th...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research

Case Study: Mechanism for Increased Follicular Helper T Cell Development in Activated PI3K Delta Syndrome
This study was carried out after written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the Stanford University and UCLA Institutional Review Boards. Author Contributions MB provided patient care and obtained IRB approval. RO prepared histology images. MB, TT, and RB designed the research. TT and LP conducted experiments and analyzed data. MB made the molecular model. MB and TT wrote the manuscript. Funding Funding for this work came from the Jeffrey Modell Foundation and from the NIH/NIGMS (R01 GM110482 to MB)....
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research