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How the airway smooth muscle in cystic fibrosis reacts in proinflammatory conditions: implications for airway hyper-responsiveness and asthma in cystic fibrosis
- Source :
- The Lancet. Respiratory medicine. 1(2)
- Publication Year :
- 2014
-
Abstract
- Summary Among patients with cystic fibrosis there is a high prevalence (40–70%) of asthma signs and symptoms such as cough and wheezing and airway hyper-responsiveness to inhaled histamine or methacholine. Whether these abnormal airway responses are due to a primary deficiency in the cystic fibrosis transmembrane conductance regulator (CFTR) or are secondary to the inflammatory environment in the cystic fibrosis lungs is not clear. A role for the CFTR in smooth muscle function is emerging, and alterations in contractile signalling have been reported in CFTR -deficient airway smooth muscle. Persistent bacterial infection, especially with Pseudomonas aeruginosa , stimulates interleukin-8 release from the airway epithelium, resulting in neutrophilic inflammation. Increased neutrophilia and skewing of CFTR -deficient T-helper cells to type 2 helper T cells creates an inflammatory environment characterised by high concentrations of tumour necrosis factor α, interleukin-8, and interleukin-13, which might all contribute to increased contractility of airway smooth muscle in cystic fibrosis. An emerging role of interleukin-17, which is raised in patients with cystic fibrosis, in airway smooth muscle proliferation and hyper-responsiveness is apparent. Increased understanding of the molecular mechanisms responsible for the altered smooth muscle physiology in patients with cystic fibrosis might provide insight into airway dysfunction in this disease.
- Subjects :
- Pulmonary and Respiratory Medicine
congenital, hereditary, and neonatal diseases and abnormalities
Pathology
medicine.medical_specialty
Cystic Fibrosis
Respiratory System
Cystic Fibrosis Transmembrane Conductance Regulator
medicine.disease_cause
Cystic fibrosis
Bronchial Provocation Tests
Proinflammatory cytokine
medicine
Humans
Calcium Signaling
Inflammation
biology
Pseudomonas aeruginosa
business.industry
Interleukins
Muscle, Smooth
respiratory system
medicine.disease
Cystic fibrosis transmembrane conductance regulator
Neutrophilia
Asthma
respiratory tract diseases
Immunology
biology.protein
Respiratory epithelium
Methacholine
medicine.symptom
business
Airway
medicine.drug
Subjects
Details
- ISSN :
- 22132600
- Volume :
- 1
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- The Lancet. Respiratory medicine
- Accession number :
- edsair.doi.dedup.....803a582ed62cecc47d35f6b5b1633c19