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Source: Frontiers in Immunology

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Total 269 results found since Jan 2013.

The Differentiation in vitro of Human Tonsil B Cells With the Phenotypic and Functional Characteristics of T-bet+ Atypical Memory B Cells in Malaria
This study was conducted in the rural village of Kalifabougou, Mali where intense P. falciparum transmission occurs from June to December each year. Isolation of Tonsil B Cells Tonsils were mechanically disrupted in complete RPMI (RPMI 1640 with L-glutamine supplemented with 10% heat-inactivated FBS, 1 mM sodium pyruvate, 1% MEM nonessential amino acids, 50 μM 2-mercaptoethanol, 100 U/ml penicillin, 100 μg/ml streptomycin, and 25 mM HEPES, pH 7.2–7.5 [all from GIBCO, Invitrogen]) and passed through a 70-μm cell strainer to make a single cell suspension. B cells were then negatively selecte...
Source: Frontiers in Immunology - April 23, 2019 Category: Allergy & Immunology Source Type: research

T Cell Receptor Expression Timing and Signal Strength in the Functional Differentiation of Invariant Natural Killer T Cells
Nyambayar Dashtsoodol1,2*, Sabrina Bortoluzzi1 and Marc Schmidt-Supprian1* 1Department of Hematology and Medical Oncology, Klinikum rechts der Isar and TranslaTUM Cancer Center, Technische Universität München, München, Germany 2Department of Microbiology and Immunology, School of Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia The CD1d-restricted Vα14 invariant NKT (iNKT) cell lineage in mice (Vα24 in humans) represents an evolutionary conserved innate-like immune cell type that recognizes glycolipid antigens. Because of their unique a...
Source: Frontiers in Immunology - April 25, 2019 Category: Allergy & Immunology Source Type: research

MASP-1 Increases Endothelial Permeability
This study was carried out in accordance with the recommendations of WMA Declaration of Helsinki 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 Semmelweis University Institutional Review Board (permission number: TUKEB141/2015). Author Contributions MLD designed and performed experiments, analyzed data, and wrote the manuscript. ZN performed the bioinformatics analysis. EK, ES, and VM contributed to cellular experiments and data analysis and commented on the manuscript. FW performed the xCELLigenc...
Source: Frontiers in Immunology - May 2, 2019 Category: Allergy & Immunology Source Type: research

Current Clinical Trials in Pemphigus and Pemphigoid
Conclusions The clinical trials discussed here, which include several trials investigating novel therapeutic targets, demonstrate that translational research in pemphigus and pemphigoid is a fast-growing field. We thus expect that several novel treatments will be shortly available for the treatment of pemphigus and pemphigoid patients. Given the high, and thus far unmet, medical need in this field (110), this is highly encouraging and will hopefully improve the quality of life of the affected patients. In addition to the compounds and targets described here, several new targets have been recently identified in preclinical...
Source: Frontiers in Immunology - May 2, 2019 Category: Allergy & Immunology Source Type: research

Human Gut-Associated Natural Killer Cells in Health and Disease
Alessandro Poggi1*, Roberto Benelli2, Roberta Venè1, Delfina Costa1, Nicoletta Ferrari1, Francesca Tosetti1 and Maria Raffaella Zocchi3 1Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 2Immunology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 3Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy It is well established that natural killer (NK) cells are involved in both innate and adaptive immunity. Indeed, they can recognize molecules induced at the cell surface by stress signals...
Source: Frontiers in Immunology - May 2, 2019 Category: Allergy & Immunology Source Type: research

Immunomodulation by Human Milk Oligosaccharides: The Potential Role in Prevention of Allergic Diseases
The prevalence and incidence of allergic diseases is rising and these diseases have become the most common chronic diseases during childhood in Westernized countries. Early life forms a critical window predisposing for health or disease. Therefore, this can also be a window of opportunity for allergy prevention. Postnatally the gut needs to mature, and the microbiome is built which further drives the training of infant's immune system. Immunomodulatory components in breastmilk protect the infant in this crucial period by; providing nutrients that contain substrates for the microbiome, supporting intestinal barrier function...
Source: Frontiers in Immunology - May 6, 2020 Category: Allergy & Immunology Source Type: research

What Can Parasites Tell Us About the Pathogenesis and Treatment of Asthma and Allergic Diseases
The same mechanisms that enable host defense against helminths also drive allergic inflammation. This suggests that pathomechanisms of allergic diseases represent evolutionary old responses against helminth parasites and that studying antihelminth immunity may provide insights into pathomechanisms of asthma. However, helminths have developed an intricate array of immunoregulatory mechanisms to modulate type 2 immune mechanisms. This has led to the hypothesis that the lack of helminth infection may contribute to the rise in allergic sensitization in modern societies. Indeed, the anti-inflammatory potential of helminth (worm...
Source: Frontiers in Immunology - September 10, 2020 Category: Allergy & Immunology Source Type: research

Probiotics in Medicine: A Long Debate
During the last years probiotics gained the attention of clinicians for their use in the prevention and treatment of multiple diseases. Probiotics main mechanisms of action include enhanced mucosal barrier function, direct antagonism with pathogens, inhibition of bacterial adherence and invasion capacity in the intestinal epithelium, boosting of the immune system and regulation of the central nervous system. It is accepted that there is a mutual communication between the gut microbiota and the liver, the so-called “microbiota-gut-liver axis” as well as a reciprocal communication between the intestinal microbiota and th...
Source: Frontiers in Immunology - September 24, 2020 Category: Allergy & Immunology Source Type: research

Targeting the Fc εRI Pathway as a Potential Strategy to Prevent Food-Induced Anaphylaxis
Despite attempts to halt it, the prevalence of food allergy is increasing, and there is an unmet need for strategies to prevent morbidity and mortality from food-induced allergic reactions. There are no known medications that can prevent anaphylaxis, but several novel therapies show promise for the prevention of food-induced anaphylaxis through targeting of the high-affinity IgE receptor (FcϵRI) pathway. This pathway includes multiple candidate targets, including tyrosine kinases and the receptor itself. Small molecule inhibitors of essential kinases have rapid onset of action and transient efficacy, which may be benefici...
Source: Frontiers in Immunology - December 17, 2020 Category: Allergy & Immunology Source Type: research

IgE and T Cell Reactivity to a Comprehensive Panel of Cockroach Allergens in Relation to Disease
IgE sensitization to cockroach allergens is associated with development of allergic diseases, such as asthma. To understand the relevance of different cockroach allergens for diagnosis and immunotherapy, a comprehensive analysis of IgE antibody levels and T cell reactivity to an expanded set of cockroach allergens and their relationship to disease was performed in a cohort of USA cockroach sensitized patients. IgE antibody levels to recombinant chitinase and hemocyanin were measured for 23 subjects by custom-made ImmunoCAPs and compared with IgE levels to eight cockroach allergens we previously reported for the same cohort...
Source: Frontiers in Immunology - February 10, 2021 Category: Allergy & Immunology Source Type: research

CpG Adjuvant in Allergen-Specific Immunotherapy: Finding the Sweet Spot for the Induction of Immune Tolerance
Prevalence and incidence of IgE-mediated allergic diseases have increased over the past years in developed and developing countries. Allergen-specific immunotherapy (AIT) is currently the only curative treatment available for allergic diseases that has long-term efficacy. Although AIT has been proven successful as an immunomodulatory therapy since its beginnings, it still faces several unmet needs and challenges today. For instance, some patients can experience severe side effects, others are non-responders, and prolonged treatment schedules can lead to lack of patient adherence and therapy discontinuation. A common strate...
Source: Frontiers in Immunology - February 23, 2021 Category: Allergy & Immunology Source Type: research

Thermoneutrality Alters Gastrointestinal Antigen Passage Patterning and Predisposes to Oral Antigen Sensitization in Mice
Food allergy is an emerging epidemic, and the underlying mechanisms are not well defined partly due to the lack of robust adjuvant free experimental models of dietary antigen sensitization. As housing mice at thermoneutrality (Tn) - the temperature of metabolic homeostasis (26–30°C) – has been shown to improve modeling various human diseases involved in inflammation, we tested the impact of Tn housing on an experimental model of food sensitization. Here we demonstrate that WT BALB/c mice housed under standard temperature (18–20°C, Ts) conditions translocated the luminal antigens in the small intestine (SI) across t...
Source: Frontiers in Immunology - March 25, 2021 Category: Allergy & Immunology Source Type: research

Innovative Systems to Deliver Allergen Powder for Epicutaneous Immunotherapy
Allergy is a disorder owing to hyperimmune responses to a particular kind of substance like food and the disease remains a serious healthcare burden worldwide. This unpleasant and sometimes fatal allergic disease has been tackled vigorously by allergen-specific immunotherapy over a century, but the progress made so far is far from satisfactory for some allergies. Herein, we introduce innovative, allergen powder-based epicutaneous immunotherapies (EPIT), which could potentially serve to generate a new stream of technological possibilities that embrace the features of super safety and efficacious immunotherapy by manipulatin...
Source: Frontiers in Immunology - March 26, 2021 Category: Allergy & Immunology Source Type: research

COVID-19 mRNA Vaccines Are Generally Safe in the Short Term: A Vaccine Vigilance Real-World Study Says
ConclusionAEFIs of COVID-19 mRNA vaccines were generally non-severe local or systemic reactions. A prior allergy history is the risk factor for anaphylaxis, while a history of anxiety may link with severe neurological AEs. Such vaccine recipients need further evaluation and monitor.
Source: Frontiers in Immunology - May 21, 2021 Category: Allergy & Immunology Source Type: research

S100A4 Is Critical for a Mouse Model of Allergic Asthma by Impacting Mast Cell Activation
ConclusionS100A4 is required for mast cell functional activation, and S100A4 may participate in the regulation of allergic responses at least partly through regulating the activation of mast cells.
Source: Frontiers in Immunology - July 22, 2021 Category: Allergy & Immunology Source Type: research