View clinical trials related to Peanut Hypersensitivity.
Filter by:The purpose of this study is to demonstrate the efficacy and safety of AR101 through reduction in clinical reactivity to peanut allergen in peanut-allergic children and adults.
Peanut allergy can be life-threatening. Current diagnostic techniques for peanut allergy have high sensitivity, but not high specificity. This clinical trial will test the validity of a novel blood biomarker (compared with current testing) as a diagnostic predictor of anaphylaxis to peanut.
Primary Objective: To determine if 36 months of peanut SLIT as an early intervention in subjects ages 1 to 4 years induces clinical desensitization. The primary outcome of this objective will be a statistically significant difference in challenge scores between the treatment group versus the placebo group during DBPCFC (Double blind placebo controlled food challenge) performed after 36 months of peanut SLIT (desensitization). Challenge scores are measured by the amount of peanut protein participants are able to ingest successfully without symptoms of an allergic reaction. [Time Frame: Baseline, 36 months] Secondary Objectives: A secondary outcome of this objective will be a statistically significant difference in the challenge score of the treatment group versus the placebo group during the DBPCFC performed 3 months after discontinuing therapy (tolerance). To examine the change in immune parameters associated with peanut SLIT and the development of clinical tolerance. Through this objective, the investigators will seek to understand the molecular processes by which SLIT affects the immune system through evaluation of immune mechanisms in relationship to clinical findings of desensitization and tolerance. The investigators will delineate the impact of peanut SLIT on the subsequent cellular and humoral responses to peanut protein. [Time Frame: Baseline, 39 months]
Many children who are allergic to peanuts do not outgrow their allergy and have very severe allergic reactions called anaphylaxis. Symptoms of anaphylaxis include difficulty breathing, decreased blood pressure, hives, and lip or throat swelling after exposure to an allergen. A severe allergic reaction can lead to death if not treated appropriately. The purpose of this study is to find out if there is a way to treat children with peanut allergy to help lower the risk of severe allergic reactions and also cause them to lose their allergy to peanuts. The approach that will used for this study is a process called "desensitization". Oral immunotherapy involves eating gradually increasing amounts of a food over several months. This is a research study because at this time peanut oral immunotherapy (OIT) is investigational. Peanut OIT (study drug) is investigational because it is not currently approved for clinical use by the Food and Drug Administration. There are no alternative safe and effective treatments for peanut induced allergic reactions other than peanut avoidance and treatment with medications.
This is a multi-center, open-label, follow-on study to gather additional information on the safety and tolerability of oral desensitization with CPNA in the subjects who participated in ARC001.
This pilot study is will examine the pathways involved in allergic response, primarily in food allergy; specifically peanut allergy. We will also study non-allergic donors as well as patients with atopic disorders, primarily as control subjects. We believe that this study will lead to discovery of significant pathways involved in the allergic pathway that can be explored in more detail during follow-up studies in order to address mechanistic questions that cannot be answered in a pilot trial. We believe that such a pilot study represents the ideal approach to identify effective therapeutic interventions and to simultaneously better understand the underlying mechanistic properties involved in the allergy cascade. We think that this study forms the basis for a novel avenue of research into the pathogenesis of allergic pathways, a disease that is still associated with significant morbidity and mortality.
Currently, there is no effective causal treatment for peanut allergy. A chemically modified, aluminium hydroxide adsorbed peanut extract (HAL-MPE1) for subcutaneous administration has been developed. Results from in vitro and in vivo preclinical studies demonstrate the immunotherapeutic potential of HAL-MPE1. Therefore, a phase I, single-centre clinical trial has been designed to assess the safety and tolerability of HAL-MPE1 in peanut allergic patients.
Peanut allergy is increasingly common, especially in countries such as UK and Australia. There is currently no accepted routine clinical therapy to cure peanut allergy. Recently studies have looked at desensitising people with peanut allergy by giving them small daily doses of roasted peanut. Although this therapy works for some people, its effects are not generally long lasting and it is associated with many side effects during protocol, resulting in a significant rate of drop-outs. Pilot data suggests that boiled peanut is less immunogenic than roasted peanut, and may therefore provide a safer way of inducing desensitisation in patients who are allergic to roasted peanut, by first inducing tolerance to boiled peanut. Study hypothesis: Increasing doses of boiled peanut can induce desensitisation to roasted peanut, in peanut-allergic individuals.
Determine whether peanut oral immunotherapy (OIT) induces clinical tolerance as assessed after the initial 3 month avoidance period Secondary Objectives: - Identify the basic immune mechanisms which can explain the differences in the effects of OIT in desensitized vs. tolerant individuals. - Determine whether immune monitoring measurements reflecting underlying mechanisms during OIT can be used to predict responses to OIT in individual subjects and, ultimately, to improve the safety and efficacy outcomes in peanut OIT protocols.
Many authors propose the strict avoidance of allergenic food as the only treatment for children known to be allergic to certain food. However, it has been observed an increase of the frequency and severity of the allergic accidents in these children in the long term. Other teams have suggested treating these allergies (in particular peanut allergies) by controlled and progressive reintroduction of the allergenic food. A good tolerance and a prevention of allergic reactions consecutive to the ingestion of the same allergenic food were observed. The immunological mechanisms of this type of treatment are not well known. A decrease of specific IgE and an increase of IgG4 have been observed in the case of egg allergies after this kind of treatment. Certain experiments realized in mice models testing the allergenic stimulation challenge showed an increase of lymphocytes T regulators (foxp3+ , CD4+, CD25+), stimulated by dendritic cells, and also an increase of interleukin 10, leading to the modification of the balance between Th1 and Th2.Our hypothesis is that after treating allergies by the reintroduction of the allergenic food, the immunological mechanism of acquisition of tolerance is associated to variations in populations of lymphocytes and in the activation or decrease of pro and anti-inflammatory cytokines. This reaction will be studied in two groups: 1. Children with a confirmed allergy to peanuts or nuts and 2. Children without antecedents of allergy or familiar atopy.