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Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms
An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.
An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.
Searching Both is inclusive of interventional and observational studies.
|Eligible Ages||5 Months - 9 Months|
Inclusion Criteria:•Inclusion in original study cohorts at birth •≥2 first-degree relatives with allergic disease (food allergy, asthma, eczema, rhinoconjunctivitis)
Exclusion Criteria:- Not included in the original study cohorts - Skin-prick test positive to any allergen (HDM, cat, grass pollen, peanut, egg and milk) age 5 months
This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.
Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.
Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.
Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.
Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.
The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.
|University of Southampton|
The person who is responsible for the scientific and technical direction of the entire clinical study.
|Graham Roberts, Prof|
|Principal Investigator Affiliation||University of Southampton|
Category of organization(s) involved as sponsor (and collaborator) supporting the trial.
The disease, disorder, syndrome, illness, or injury that is being studied.
|Immunotherapy, Allergy and Immunology, Asthma|
There is an epidemic of allergic disease in childhood and current preventative strategies have failed to demonstrate effectiveness outside of isolated trials. In a previous study, the efficacy of sublingual immunotherapy (SLIT) with house dust mite in preventing the development of allergic sensitisation in infants was assessed. The long term objective was to assess the effect of the intervention on the subsequent development of asthma. The hypothesis is that high dose oral immunotherapy will induce immune tolerance and reduce development of allergic sensitisation and later clinical asthma and allergy. A total of 111 infants at high risk of allergy (with ≥2 first degree relatives affected by asthma or allergy) but with no evidence of allergic sensitisation at recruitment were recruited. These infants were randomised at 6 months of age to receive a year of active HDM (House dust-mite) allergen extract delivered as SLIT or placebo intervention. At 18 months of age, there was a significant reduction in cumulative allergic sensitisation in the SLIT intervention group and a trend for reduction in allergic symptoms. They have also been followed up at 3 years of age. The data currently being analysed. Additionally, an observational cohort (Immune Tolerance in Early Childhood, ITEC) was recruited at birth with the same inclusion criteria as the interventional one and assessed in the same way up to 3 years. This cohort has provided additional control data and samples to utilise in the analyses. This proposed study is the 6-8 year follow up of these interventional and observational cohorts. The aim of the 6-8 year assessment is to assess the efficacy of prophylactic oral immunotherapy with HDM allergen in preventing the later development of asthma. The hypothesis is that high dose oral immunotherapy will induce immune tolerance and reduce development of allergic sensitisation and later clinical asthma and allergy. Participants will be assessed 6-8 years after finishing the intervention. The assessment will include a questionnaire, skin prick testing to the common aeroallergens and food allergens and lung function. Families and study investigators will both be blinded to participants' original treatment allocations. An additional aim is to investigate the epigenetic and immune mechanisms involved in the development of asthma and allergy and how allergen immunotherapy influence this process.
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