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Source: Frontiers in Immunology

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Total 269 results found since Jan 2013.

B Cell Reconstitution and Influencing Factors After Hematopoietic Stem Cell Transplantation in Children
Nicolaas G. van der Maas, Dagmar Berghuis, Mirjam van der Burg and Arjan C. Lankester* Willem-Alexander Children's Hospital, Department of Pediatrics and Laboratory for Pediatric Immunology, Leiden University Medical Center, Leiden, Netherlands B cell reconstitution after hematopoietic stem cell transplantation (HSCT) is variable and influenced by different patient, donor, and treatment related factors. In this review we describe B cell reconstitution after pediatric allogeneic HST, including the kinetics of reconstitution of the different B cell subsets and the development of the B cell repertoire, and d...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research

Targeted NGS Platforms for Genetic Screening and Gene Discovery in Primary Immunodeficiencies
Conclusions: NGS technology represents a powerful approach in the complex field of rare disorders but its different application should be weighted. A relatively small NGS target panel can be successfully applied for a robust diagnostic suspicion, while when the spectrum of clinical phenotypes overlaps more than one PID an in-depth NGS analysis is required, including also whole exome/genome sequencing to identify the causative gene. Introduction Primary immunodeficiencies (PIDs) are a phenotypically and genetically heterogeneous group of more than 300 monogenic inherited disorders resulting in immune defects that pred...
Source: Frontiers in Immunology - April 10, 2019 Category: Allergy & Immunology Source Type: research

Sequential Immunization With Live-Attenuated Chimeric Hemagglutinin-Based Vaccines Confers Heterosubtypic Immunity Against Influenza A Viruses in a Preclinical Ferret Model
This study was also partly funded by a research contract from GSK. The findings and conclusions contained within are those of the authors and do not necessarily reflect positions or policies of the funders. Conflict of Interest Statement AG-S, FK, and PP are inventors in patent applications filed and owned b
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

Contribution of Non-immune Cells to Activation and Modulation of the Intestinal Inflammation
Conclusions As the intestinal mucosa surface constitutes the major surface of the body which is in direct contact with the outer environment, intestinal immune homeostasis must be accurately regulated. The interplay between commensal microbiota, intestinal stromal cells, and the mucosal immune system components should guarantee the intestinal homeostasis to avoid a sustained inflammation that could induce tissue damage. However, several factors can lead to inflammation through homeostasis breakdown. Figure 1 summarizes the main points that have been reviewed here. We have described what it is known so far about the role o...
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

Innate Lymphoid Cells in Helminth Infections —Obligatory or Accessory?
Conclusion ILC2s are clearly an inherent feature of the immune response to helminth infection, and in all probability their evolution has been driven by the threat of parasites. While in experimental model systems they are not always found to be essential, they are often center stage, particularly in the early phases of infection of each helminth system so far analyzed. They also form an important conceptual and mechanistic link with the allergic response that will allow us to understand in more detail the genesis and control of allergic disorders. In this respect, a much fuller analysis of ILC biology and function in the...
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

Complement C5b-9 and Cancer: Mechanisms of Cell Damage, Cancer Counteractions, and Approaches for Intervention
In conclusion, osmotic burst of inflated complement-damaged cells may occur, but these bursts are most likely a consequence of metabolic collapse of the cell rather than the cause of cell death. The Complement Cell Death Mediator: A Concerted Action of Toxic Moieties Membrane pores caused by complement were first visualized by electron microscopy on red blood cell membranes as large ring structures (22). Similar lesions were viewed on E. coli cell walls (23). Over the years, ample information on the fine ultrastructure of the MAC that can activate cell death has been gathered (24) and has been recently further examined (...
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

BKV Clearance Time Correlates With Exhaustion State and T-Cell Receptor Repertoire Shape of BKV-Specific T-Cells in Renal Transplant Patients
This study was approved by our local ethical review committee in compliance with the declaration of Helsinki. Informed and written consent was obtained from all patients (Ethic Committee Charité University Medicine, Berlin, Germany, EA2/028/13). The study cohort consisted of 7 kidney transplant recipients with sustained BKV reactivation (Table 1). The HLA typing for each patient and donor is summarized in Figure 1. TABLE 1 Table 1. Characteristics of patients with BKV reactivation. FIGURE 1 Figure 1. Recipient and donor HLA type. HLA type of the patients and their kidney donors. Black square i...
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

Fc γR-TLR Cross-Talk Enhances TNF Production by Human Monocyte-Derived DCs via IRF5-Dependent Gene Transcription and Glycolytic Reprogramming
This study was done according to the ethical guidelines of the Academic Medical Center and human material was obtained in accordance with the AMC Medical Ethics Review Committee according to the Medical Research Involving Human Subjects Act. Buffy coats obtained after blood donation (Sanquin blood supply) are not subjected to informed consent, which is according to the Medical Research Involving Human Subjects Act and the AMC Medical Ethics Review Committee. All samples were handled anonymously. Ethical review and approval was not required for this study in accordance with the local legislation. Monocytes were isolated fro...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

BET Bromodomain Inhibitor iBET151 Impedes Human ILC2 Activation and Prevents Experimental Allergic Lung Inflammation
This study was supported by grants from GSK and the UK Medical Research Council (U105178805). Conflict of Interest Statement AM has grant funding from GSK and AstraZeneca/MedImmune. MB, DJ, AP, DT, and AvO are employees of GSK. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Acknowledgments We are grateful to the Ares staff, genotyping facility, and flow cytometry core for their technical assistance. We thank Jen Walker for advice on the manuscript. Supplementary Material The Supplem...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

Plasmacytoid Dendritic Cells Provide Protection Against Bacterial-Induced Colitis
In conclusion, our data indicates that pDC have a protective role in limiting bacterial load in the gut and helping to maintain the intestinal barrier. As C. rodentium is closely related to the attaching and effacing human pathogens EPEC/EHEC, our work suggests that pDC may also play a role in protection from these organisms. More generally, a role for pDC in maintenance of the gut mucosal barrier and perhaps gut homeostasis would mean these cells may be important in protection from many human gut pathogens. pDC also appeared to regulate the systemic inflammatory response to pathogens released from the gut. Although pDC-de...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

NF- κB Signaling in Macrophages: Dynamics, Crosstalk, and Signal Integration
Conclusions NF-κB is a master regulator of innate immune responses, and vital to many of the roles that macrophages and other innate immune cells play in orchestrating the inflammatory response to pathogens. In this review, we have outlined the many variables that influence the outcomes of NF-κB signaling, including those that are cell-, tissue-, and stimulus-specific. Over 30 years of research has illuminated the dynamics of this signaling pathway and the genes that are regulated by it, leading to many breakthroughs in how we understand NF-κB function. However, much of this information has come fr...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

The Pivotal Role of Regulatory T Cells in the Regulation of Innate Immune Cells
This study was provided by the Canadian Institutes of Health Research and the Manitoba Health Research Council. Conflict of Interest Statement The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. References 1. Sprent J, Kishimoto H. The thymus and central tolerance. Philos Trans R Soc Lond B Biol Sci. (2001) 356:609–16. doi: 10.1098/rstb.2001.0846 PubMed Abstract | CrossRef Full Text | Google Scholar 2. Sakaguchi S, Wing K, Miyara M. Regulatory T cells - a brief history and perspective...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

Editorial: Orchestration of an Immune Response to Respiratory Pathogens
Steven M. Varga1 and Andrea J. Sant2* 1Microbiology and Immunology, University of Iowa, Iowa City, IA, United States2Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Rochester, NY, United States Editorial on the Research Topic Orchestration of an Immune Response to Respiratory Pathogens This issue of Frontiers deals with the complex series of events and long-term consequences of immune responses to respiratory pathogens. In this issue, the contributors discuss the earliest events following infection, the alternative paths that the adaptive immune response can take an...
Source: Frontiers in Immunology - April 8, 2019 Category: Allergy & Immunology Source Type: research

Mind the Gap: How Interspecies Variability in IgG and Its Receptors May Complicate Comparisons of Human and Non-human Primate Effector Function
Conclusions The sheer number of factors to consider when translating observations between macaques and humans makes the process a challenging, multidimensional one. Differences in the structures and activities of IgG subclasses, and polymorphisms in protein sequence and post-translational modification of antibody receptors are a subset of the many relevant considerations. Copy number variation, splice variants, and alleles with sequence variation outside of coding regions have been associated with a diversity of phenotypes in humans (183, 213–217), and are presumed to exist in NHP. A number of differences in the p...
Source: Frontiers in Immunology - April 7, 2019 Category: Allergy & Immunology Source Type: research

Gut Microbiome as Target for Innovative Strategies Against Food Allergy
Roberto Berni Canani, Lorella Paparo, Rita Nocerino, Carmen Di Scala, Giusy Della Gatta, Ylenia Maddalena, Aniello Buono, Cristina Bruno, Luana Voto, Danilo Ercolini
Source: Frontiers in Immunology - February 15, 2019 Category: Allergy & Immunology Source Type: research