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The Long-term Prognosis of Moderate to Severe Bronchial Hyperresponsiveness (BHR) in Asthmatic Preschool Children

2014-08-27 03:12:54 | BioPortfolio

Summary

The aim of investigator´s clinical trial is to investigate 52 patients aged three to five years with viral-induced asthma and 52 patients aged three to five years with allergic asthma. Over a time-span of 5 years the investigators will explore lung function and bronchial responsiveness. The investigators plan to evaluate long-term clinical history of moderate to severe bronchial hyperresponsiveness in preschool children with asthma. Therefore factors like atopy in children, parental atopy and bronchial hyperresponsiveness will be explored.

Description

A positive family history with prevalence of atopy, eczema, wheezing are well-known factors predicting asthma. Caudri et al found more important predictors like perinatal transmission, parental use of inhalative medications and wheezing/dyspnea out of viral infections(5). Measurement of BHR in children was in most studies a second outcome parameter.

Four visits will be performed, baseline and after 1, 3, and 5 years. At visit 1 the investigators will characterize all patients by a ISAAC survey. At each visit in children a methacholine challenge, a skin Prick test, eNO, RAST and total IgE will be performed. At visit 3 and 4 sputum will be induced. In parents only at the first visit a methacholine challenge will be performed. A genetic identification of ADAM33 gene from EDTA blood shall be provided. ADAMs are multidomain proteins with a metalloprotease domain, associated with airway remodelling. Visits should be kept in a time interval without asthma therapy and respiratory infection.

To examine the feasibility of methacholine challenges in preschool children data rised in 2006 will be analysed.

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Conditions

Intrinsic Asthma

Intervention

methacholine bronchial challenge, methacholine bronchial challenge

Location

Goethe University
Frankfurt am Main
Germany
60590

Status

Not yet recruiting

Source

Johann Wolfgang Goethe University Hospitals

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:12:54-0400

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Medical and Biotech [MESH] Definitions

Tests involving inhalation of allergens (nebulized or in dust form), nebulized pharmacologically active solutions (e.g., histamine, methacholine), or control solutions, followed by assessment of respiratory function. These tests are used in the diagnosis of asthma.

A group of compounds that are derivatives of beta-methylacetylcholine (methacholine).

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A beta-2 adrenergic agonist used in the treatment of ASTHMA and BRONCHIAL SPASM.

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