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Effect of allergen avoidance in infancy on airway inflammation

Primary prevention of asthma and atopy by allergen avoidance. Do preventative measures influence the type and degree of airway inflammation?

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN28233205
Enrollment
120
Registered
2010-05-12
Start date
2009-03-01
Completion date
Unknown
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Topic: Respiratory

Interventions

Dietary and house dust mite allergy prevention. Sputum Induction: This involves breathing in a mist of saline solution, which helps make phlegm in the lungs, which is then collected in a sputum pot.

Sponsors

Isle of Wight Healthcare NHS Trust (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Everyone (120 subjects) who participated in the original Isle of Wight Primary Prevention study will be asked if they wish to participate.

Exclusion criteria

Exclusion criteria: 1. Any patient who does not wish to participate 2. Any patient where their lung function test suggests that they would be at risk of significant bronchospasm and/or clinical suspicion is high that they would not tolerate sputum induction

Design outcomes

Primary

MeasureTime frame
Number of sputum eosinophils in the intervention versus control group. Sputum samples will be collected during a visit to the research centre, with preparation and analysis taking place after.

Secondary

MeasureTime frame
1. Number of other cells (1) neutrophils, (2): epithelial cells in sputum in the two groups 2. Eosinophilic inflammatory markers (eosinophilic cationic protein and interleukin 5) in sputum supernatant in the two groups Sputum samples will be collected during a visit to the research centre, with preparation and analysis taking place after.

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026