Early pulmonary inflammation and lung damage in children with cystic fibrosis
1Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, Western Australia, Australia; School of Paediatric and Child Health, University of Western Australia, Perth, Western Australia, Australia; Telethon Kids Institute, Perth, Western Australia, Australia.
Insights
Cystic fibrosis (CF) causes progressive lung damage due to airway inflammation and infection, even before symptoms appear. Understanding the altered airway microenvironment is key to preventing early lung disease in CF patients.
Area of Science:
- Pulmonary Medicine
- Genetics
- Cell Biology
Background:
- Cystic Fibrosis (CF) is a genetic disorder characterized by progressive airway inflammation, infection, and lung damage.
- These pathological processes begin early in life, often preceding the onset of clinical symptoms.
- CF arises from mutations in the CF transmembrane regulator (CFTR) gene, leading to a dysfunctional airway microenvironment.
Purpose of the Study:
- To review the mechanisms by which an altered airway microenvironment drives CF lung disease.
- To examine the CF airway's response to early-life infection.
- To discuss strategies for preventing inflammation and early lung disease in CF.
Main Methods:
- Literature review of studies on CF pathogenesis and treatment.
- Analysis of the impact of CFTR dysfunction on airway surface liquid (ASL) properties.
- Examination of inflammatory and infectious processes in early CF lung disease.
Main Results:
- CFTR mutations result in ASL dehydration, reduced ASL acidity, altered mucin composition, and dysregulated inflammation.
- These microenvironmental changes promote lung damage even before significant infection is established.
- Early infection exacerbates inflammation and accelerates disease progression.
Conclusions:
- The aberrant airway microenvironment is a critical driver of early CF lung disease.
- Targeting microenvironmental factors and early inflammation is crucial for therapeutic intervention.
- Preventative strategies are essential to mitigate progressive lung damage in individuals with CF.
Abstract:
Individuals with cystic fibrosis (CF) suffer progressive airway inflammation, infection and lung damage. Airway inflammation and infection are present from early in life, often before children are symptomatic. CF gene mutations cause changes in the CF transmembrane regulator protein that result in an aberrant airway microenvironment including airway surface liquid (ASL) dehydration, reduced ASL acidity, altered airway mucin and a dysregulated inflammatory response. This review discusses how an altered microenvironment drives CF lung disease before overt airway infection, the response of the CF airway to early infection, and methods to prevent inflammation and early lung disease.
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