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Updated: Sep 28, 2026

Noninvasive Sampling of Mucosal Lining Fluid for the Quantification of In Vivo Upper Airway Immune-mediator Levels
Published on: August 7, 2017
Inflammation in childhood asthma and other wheezing disorders
1Department of Pediatrics and Medicine, University of Wisconsin Medical School, Madison, Wisconsin 53792, USA. rfl@medicine.wisc.edu
Insights
Identifying asthma in young children is crucial to prevent irreversible airway remodeling. Early diagnosis using inflammation markers like eosinophils aids in distinguishing asthma from other wheezing conditions, though more research is needed.
Area of Science:
- Pediatric respiratory medicine
- Immunology of asthma
Background:
- Asthma is primarily characterized by airway tissue inflammation.
- Chronic inflammation can lead to irreversible airway remodeling, even in early childhood.
- Early identification of childhood asthma phenotypes is essential for timely intervention.
Purpose of the Study:
- To highlight the critical need for distinguishing asthma from other causes of wheezing in young children.
- To emphasize the importance of early treatment to prevent airway remodeling.
- To discuss the current limitations and future research directions in diagnosing pediatric asthma.
Main Methods:
- Review of current understanding of asthma pathology and diagnosis in children.
- Discussion of inflammatory mediators (e.g., eosinophils) as potential diagnostic markers.
- Analysis of challenges in differential diagnosis of pediatric wheezing disorders.
Main Results:
- Airway inflammation is the primary pathology in asthma.
- Airway remodeling can occur early in children with chronic asthma.
- Eosinophil levels may help differentiate asthma from viral-induced wheezing.
Conclusions:
- Accurate diagnosis of asthma in young children is challenging but vital for preventing long-term airway damage.
- Biomarkers like eosinophils show promise but are insufficient for definitive diagnosis.
- Further research is required to establish definitive markers for differentiating pediatric asthma from other respiratory conditions.
Abstract:
It has become clear in the last few decades that the primary underlying pathology of asthma is airway tissue inflammation. In asthma, airway remodeling occurs during chronic inflammation, even in very young children. One of the key goals in treating asthma is to identify those young children with an asthmatic phenotype and initiate early treatment to avoid irreversible airway remodeling. Distinguishing asthma from other conditions that induce wheezing is a daunting but critical step in the appropriate treatment of asthma. In some children, hallmark mediators of inflammation, such as increased eosinophil levels, may distinguish asthma from other causes of wheezing, such as viral infections. Although progress has been made in the differential diagnoses of asthma in young children, more research is needed to define unique markers for distinguishing asthma from other respiratory conditions that produce wheezing.
Related Concept Videos
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma-I: Introduction
Asthma-II: Pathophysiology and Classification
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma-III: Symptoms and Complications
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Asthma I: Introduction
Asthma III: Clinical Manifestations

