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Microbial diversity within the airway microbiome in chronic pediatric lung diseases
Andrea Hahn1, Stephanie Warnken2, Marcos Pérez-Losada3
1Division of Infectious Diseases, Children's National Health System (CNHS), Washington, D.C. 20010, USA; Department of Pediatrics, George Washington University (GWU) School of Medicine and Health Sciences (SMHS), Washington, D.C. 20052, USA.
Insights
Pediatric airway diseases like cystic fibrosis and asthma are linked to changes in the airway microbiome. Understanding microbial diversity is key to developing new treatments for these inflammatory conditions.
Area of Science:
- Pediatric pulmonology
- Microbiome research
- Inflammatory diseases
Background:
- The airway microbiome's role in pediatric respiratory diseases is an emerging area of study.
- Microbial diversity is implicated in acute and chronic airway inflammation.
- Key diseases include cystic fibrosis, asthma, and chronic lung disease of prematurity.
Purpose of the Study:
- To explore the relationship between airway microbiome diversity and pediatric inflammatory lung diseases.
- To highlight the significance of microbial diversity in conditions like cystic fibrosis, asthma, and bronchopulmonary dysplasia.
- To discuss advanced sequencing techniques for microbiome analysis.
Main Methods:
- Review of current research on pediatric airway microbiome.
- Discussion of metataxonomic (16S rRNA sequencing) and metagenomic (shotgun sequencing) approaches.
- Emphasis on the advantages of metagenomics for detailed microbial analysis.
Main Results:
- Decreased microbial diversity is associated with Pseudomonas spp. in cystic fibrosis and poorer lung function.
- Early viral infections may alter bacterial diversity, increasing asthma risk.
- Ureaplasma spp. in premature infants correlates with higher risk of chronic lung disease and inflammation.
Conclusions:
- Microbiome alterations significantly impact pediatric airway inflammation and disease risk.
- Metagenomic sequencing offers superior resolution for analyzing the airway microbiome's composition and function.
- Future research using advanced sequencing techniques can inform novel therapeutic strategies for vulnerable pediatric populations.
Abstract:
The study of the airway microbiome in children is an area of emerging research, especially in relation to the role microbial diversity may play in acute and chronic inflammation. Three such pediatric airway diseases include cystic fibrosis, asthma, and chronic lung disease of prematurity. In cystic fibrosis, the presence of Pseudomonas spp. is associated with decreased microbial diversity. Decreasing microbial diversity is also associated with poor lung function. In asthma, early viral infections appear to drive changes in bacterial diversity which may be associated with asthma risk. Premature infants with Ureaplasma spp. are at higher risk for chronic lung disease due to inflammation. Microbiome changes due to prematurity also appear to affect the inflammatory response to viral infections post-natally. Importantly, microbial diversity can be measured using metataxonomic (e.g., 16S rRNA sequencing) and metagenomic (e.g., shotgun sequencing) approaches. A metagenomics approach may be preferable as it can provide further granularity of the sample composition, identifying the bacterial species or strain, information on additional microbial components, including fungal and viral components, information about functional genomics of the microbiome, and information about antimicrobial resistance mutations. Future studies of pediatric airway diseases incorporating these techniques may provide evidence for new treatment approaches for these vulnerable patient populations.
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