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Source: Frontiers in Immunology

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Total 269 results found since Jan 2013.

Oral Immunotherapy and Basophil and Mast Cell Reactivity in Food Allergy
Basophil activation tests (BATs) can closely monitor, in vitro, a patient’s propensity to develop type I hypersensitivity reactions. Because of their high specificity and sensitivity, BATs have become promising diagnostic tools, especially in cases with equivocal clinical histories, skin prick test results, and/or levels of specific IgE to allergen extracts. BATs also are useful as tools for monitoring the effects of treatment, since oral immunotherapy (OIT) studies report a diminution in patients’ basophil responsiveness over the course of OIT. This review will discuss the BAT findings obtained before, during, and aft...
Source: Frontiers in Immunology - December 14, 2020 Category: Allergy & Immunology Source Type: research

Mucosal Nanoemulsion Allergy Vaccine Suppresses Alarmin Expression and Induces Bystander Suppression of Reactivity to Multiple Food Allergens
We have demonstrated that intranasal immunotherapy with allergens formulated in a nanoemulsion (NE) mucosal adjuvant suppresses Th2/IgE-mediated allergic responses and protects from allergen challenge in murine food allergy models. Protection conferred by this therapy is associated with strong suppression of allergen specific Th2 cellular immunity and increased Th1 cytokines. Here we extend these studies to examine the effect of NE-allergen immunization in mice sensitized to multiple foods. Mice were sensitized to both egg and peanut and then received NE vaccine formulated with either one or both of these allergens. The an...
Source: Frontiers in Immunology - February 25, 2021 Category: Allergy & Immunology Source Type: research

The Role of Non-Immune Cell-Derived Extracellular Vesicles in Allergy
Extracellular vesicles (EVs), and especially exosomes, have been shown to mediate information exchange between distant cells; this process directly affects the biological characteristics and functionality of the recipient cell. As such, EVs significantly contribute to the shaping of immune responses in both physiology and disease states. While vesicles secreted by immune cells are often implicated in the allergic process, growing evidence indicates that EVs from non-immune cells, produced in the stroma or epithelia of the organs directly affected by inflammation may also play a significant role. In this review, we provide ...
Source: Frontiers in Immunology - August 19, 2021 Category: Allergy & Immunology Source Type: research

Periostin in Allergy and Inflammation
Matricellular proteins are involved in the crosstalk between cells and their environment and thus play an important role in allergic and inflammatory reactions. Periostin, a matricellular protein, has several documented and multi-faceted roles in health and disease. It is differentially expressed, usually upregulated, in allergic conditions, a variety of inflammatory diseases as well as in cancer and contributes to the development and progression of these diseases. Periostin has also been shown to influence tissue remodelling, fibrosis, regeneration and repair. In allergic reactions periostin is involved in type 2 immunity...
Source: Frontiers in Immunology - August 27, 2021 Category: Allergy & Immunology Source Type: research

Integrative Transcriptomics Reveals Activation of Innate Immune Responses and Inhibition of Inflammation During Oral Immunotherapy for Egg Allergy in Children
We previously reported the results of a randomized, open-label trial of egg oral immunotherapy (OIT) in 50 children where 44% were desensitized and 46% were partially desensitized after 8 months of treatment. Here we focus on cell-mediated molecular mechanisms driving desensitization during egg OIT. We sought to determine whether changes in genome-wide gene expression in blood cells during egg OIT correlate with humoral responses and the clinical outcome. The blood cell transcriptome of 50 children receiving egg OIT was profiled using peripheral blood mononuclear cell (PBMC) samples obtained at baseline and after 3 and 8 m...
Source: Frontiers in Immunology - December 15, 2021 Category: Allergy & Immunology Source Type: research

Generation of high affinity ICAM-1-specific nanobodies and evaluation of their suitability for allergy treatment
In conclusion, our results showed that the selected ICAM-1-specific nanobody bound ICAM-1 with high affinity and was not internalized. Thus, it could be further used to engineer heterodimers with allergen-specific nanobodies in order to develop topical treatments of pollen allergy.
Source: Frontiers in Immunology - November 9, 2022 Category: Allergy & Immunology Source Type: research

Prevalence of parent-reported food allergy among children in China: A population-based cross-sectional survey
ConclusionsA high prevalence of parent-reported FA was observed among children in general primary schools in Jiangxi Province, China. Shrimp, mango, and mollusks were the most common causative foods. The main common symptoms of FA were adverse reactions relating to the skin system. The rate of severe allergic reactions was also high in Jiangxi Children with reported FA. Local standards and policies for the prevention and management of FA need to be adjusted on a timely basis according to actual local conditions.
Source: Frontiers in Immunology - December 12, 2022 Category: Allergy & Immunology Source Type: research

Intermittent fasting protects against food allergy in a murine model via regulating gut microbiota
ConclusionIn an OVA-induced mice FA model, long-term IF may attenuate FA by reducing Th2 inflammation, maintaining the integrity of the intestinal epithelial barrier, and preventing gut dysbiosis.
Source: Frontiers in Immunology - May 9, 2023 Category: Allergy & Immunology Source Type: research

Anaphylaxis in Elderly Patients —Data From the European Anaphylaxis Registry
Conclusion: Anaphylaxis in the elderly is often caused by insect venoms and drugs. These patients suffer more often from cardiovascular symptoms, receive more frequently adrenaline and require more often hospitalization. The data indicate that anaphylaxis in the elderly tends to be more frequently life threatening and patients require intensified medical intervention. The data support the need to recognize anaphylaxis in this patient group, which is prone to be at a higher risk for a fatal outcome. Introduction The incidence of anaphylaxis, which may occur at any age, is rising in Western countries (1, 2). While life...
Source: Frontiers in Immunology - April 23, 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

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

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

A Critical View of Specific Antibody Deficiencies
Ricardo U. Sorensen1,2,3* 1Professor Emeritus of Pediatrics, Department of Pediatrics, Louisiana State University Health Science Center, New Orleans, LA, United States 2Louisiana Primary Immunodeficiency Network, New Orleans, LA, United States 3Honorary Professor, Faculty of Medicine, University of La Frontera, Temuco, Chile In thisopinion manuscript the author postulates that the present definition of Specific Antibody Deficiency (SAD) needs to be revised and expanded. It is presently defined as a syndrome of low IgG antibody responses to purified Streptococcus pneumoniae capsular polysaccharides vaccine...
Source: Frontiers in Immunology - April 30, 2019 Category: Allergy & Immunology Source Type: research

Sex Differences in IL-33-Induced STAT6-Dependent Type 2 Airway Inflammation
In this study, we have demonstrated that delivery of OVA+IL-33 to the lungs of mice induced an innate inflammatory response that exhibited sex-dependent differences in magnitude and regulation. Compared to males, female mice produced larger amounts of type 2 cytokines and chemokines and had substantially more activated eosinophils and AAM in the lung; each of these responses was significantly lower in female mice lacking STAT6. On the contrary, male mice displayed less inflammation overall, and in some instances, no apparent role for STAT6 was observed. BALF levels of inflammatory mediators and eosinophils were very lo...
Source: Frontiers in Immunology - April 30, 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