Active clinical trials for "Food Hypersensitivity"

Food allergy (FA) derives from an abnormal immunological response to dietary antigens. On the basis of the immunological mechanism, FA are divided into the following forms: IgE-mediated, non-IgE-mediated and mixed. Prevalence, persistence and severity of pediatric FA have significantly increased over the past 2 decades. The treatment of FA is based on a rigorous elimination diet and on the correct management of acute allergic reactions, induced by the accidental ingestion of food allergens, with antihistamines, cortisones and adrenaline. Ensuring a strict exclusion of the allergen from the diet can be problematic, with the risk of nutritional deficiencies, accidental exposure, cross-contamination or caused by incorrect labeling of processed food products. At the same time, the daily management of a correct elimination diet and a possible allergic reaction, entail a significant burden and high levels of anxiety and stress associated with uncertainty about the management of anaphylaxis, in the parents of children with FA, particularly in mothers, resulting in an impact on Quality of Life (QoL). The availability of a multidisciplinary team made up of pediatricians, allergists and dietitians / nutritionists with experience in the field of FA could reduce the stress and anxiety of parents, while improving their QoL. Currently, for the evaluation of the quality of life of the parent of a child with FA, specific questionnaires for food allergies developed and validated in English are used: the food allergy self-efficacy scale for parents (FASE-P) and the Food Allergy Quality of Life - Parental Burden Questionnaire (FAQL-PB).

The prevalence of food allergy in the western world is a growing health problem. The majority of reactions are caused due to oral exposure to the known food allergen. However, there are reports about allergic symptoms after exposure to the allergenic food by contact and/ or inhalation. Most of those reports are subjective without an objective report of healthcare professionals. There are only a few prospective studies that observed objectively the "reliability" of those subjective reports. The estimated chance for systemic allergic reaction due to skin prick test with fresh food is 0.008%, and even then it will not cause anaphylaxis that will need epinephrine use. That evidence is in concordance with our experience. Even with all the information gathered, a study that examines the chance of systemic reaction after skin contact with the allergenic food is still missing. Additionally, lately, researchers start to examine the influence of food allergy on the quality of life (QOL) of allergic children and their parents. As expected, all studies show negative effects on QOL. The major concern of the parents is from random exposure and severe allergic reaction due to contact with the allergenic food. As far as the investigators know, no study examined the influence of supervised contact with allergenic food on the fear of the child and his parents. The study aims to evaluate the risk for a systemic allergic reaction after skin exposure to allergenic food in children with known food allergy.

Aim of the study is to improve the diagnosis of food allergy and hypersensitivity. Intestinal homogenates will be used to determine total IgE, specific IgE, tryptase, histamine and inflammation parameters (IFNgamma, TNFalpha). These data will be correlated with serum values and disease status. In addition, organoids from duodenal tissue will be isolated and cultured in vitro and stimulated with the major food allergens. The gene and protein expression will be checked to identify relevant biomarkers.

Cow's Milk Allergy (CMA) affects between 2-3% of young children but its severity varies between regions/countries. While the long-term prognosis for CMA is good, with the majority (80-90%) of children outgrowing their allergy by around 3-5 years. Breast feeding is the most optimal form of feeding for all infants, regardless of their condition, and in those with CMA maternal dairy exclusion is recommended as first line treatment. In non-breast fed or mixed feeding, a hypoallergenic milk substitute is recommended for young infants. The AAP and other societies such as EAACI and ESPGHAN considers a formula to be 'hypoallergenic' if at least 90% of children with documented CMA tolerate it, with a 95% CI, under double-blind, placebo-controlled conditions.This equates to at least 29 children who should tolerate the product following blind and open challenge.

Anaphylaxis elicited by accidental intake of the offending food constitutes a major health risk to the food allergic patient. Current advice for the food allergic patient is to avoid the offending food allergen and to carry an epinephrine autoinjector. However, novel treatments altering the clinical reactivity to the offending food thereby diminishing the risk of anaphylaxis are much needed. A correlation between the level of specific IgE in serum towards the offending food and the clinical sensitivity of the patient has been suggested. The clinical threshold for a food allergic reaction to occur is therefore hypothesized to increase by reducing the level of specific IgE to the relevant food allergen. Therapy with Omalizumab has proven efficacious in lowering the level of IgE in serum but a high pre-treatment level of total IgE in serum potentially hampers the efficacy in a number of patients, as seen especially in patients with concomitant atopic dermatitis. The aim of this study is to investigate if the combination of initial IgE specific immunoadsorption combined with subsequent treatment with Omalizumab will increase the clinical threshold to the culprit food and thus prevent medical emergencies (anaphylaxis) in patients with severe food allergy.

Oral immunotherapy (OIT) is a food allergy treatment where small amounts of the food a child is allergic to is eaten and gradually increased over time with the aim to be able to eat a certain amount of the allergen without experiencing an allergic reaction. While this process works in many children there are concerns about safety, feasibility and drop-outs and how to adapt protocols for multiple allergies. Many OIT trials have targeted approximately 4000mg of single food/day. In these trials up to 40% drop-out. There is evidence much lower doses can have beneficial effects. The investigators will evaluate if low doses of foods can allow for OIT to multiple foods. This approach may have efficacy against accidental exposure and be able to demonstrate immune changes. This approach may have a low burden of treatment and a low rate of allergic reactions and

This study is a multi-center, randomized, double-blind, placebo-controlled study in participants 1 to less than 56 years of age who are allergic to peanut and at least two other foods (including milk, egg, wheat, cashew, hazelnut, or walnut). While each participant may be allergic to more than two other foods, the primary endpoint/outcome in this study will only be assessed in peanut and two other foods for each participant. The primary objective of the study is to compare the ability to consume foods without dose-limiting symptoms during a double-blind placebo-controlled food challenge (DBPCFC), after treatment with either omalizumab or placebo for omalizumab.

This is an open-label, safety extension study for participants who participated in the Harmony study (protocol ADP101-MA-01).

iREACH is a five-year NIH funded study aimed at assessing and improving pediatric clinician adherence to the 2017 NIAID Prevention of Peanut Allergy (PPA) Guidelines. iREACH has been developed as an electronic health record (EHR) integrated Clinical Decision Support (CDS) tool together with educational modules on the PPA guidelines to assist clinicians in implementing the 2017 NIAID PPA Guidelines. A practice-based, two-arm, cluster-randomized clinical trial will evaluate the effectiveness of iREACH in increasing pediatric clinician adherence to the PPA Guidelines and explore the end-goal of reducing peanut allergy incidence by age 2.5 years in the intervention vs control group. This study has the potential to: 1) provide evidence regarding the effectiveness of iREACH in promoting clinical processes and outcomes related to the PPA Guidelines, 2) provide important insight about practice-based implementation of PPA Guidelines by pediatric clinicians, allergists and caregivers, and 3) facilitate rapid, widespread implementation of PPA Guidelines and reduce peanut allergy incidence across the US.

The investigators will conduct low-dose intranasal allergen challenges on children and young people with an indeterminate diagnosis of food allergy to cow's milk or peanut. Blood samples will also be taken, for conventional blood allergy diagnostics (allergy-specific Immunoglobulin E) and mast cell activation test (MAT). The data will be used to determine the diagnostic accuracy of two complementary, novel approaches to diagnose food allergy, in a representative clinical cohort.