Lower respiratory tract microbiome composition and community interactions in smokers

作者：Michael Campos, Trevor Cickovski, Mitch Fernandez, Melita Jaric, Adam Wanner, Gregory E. Holt, Elio Donna, Eliana Mendes, Eugenia Silva‐Herzog, Lisa Schneper, Jonathan Segal, David Moraga Amador, Juan Riveros, Vanessa Aguiar‐Pulido, Santanu Banerjee, Matthias Salathé, Kalai Mathee, Giri Narasimhan · 年份：2022 · DOI：10.1099/acmi.0.000497.v1 · 被引用次数：2 · 研究领域：Gut microbiota and health、Chronic Obstructive Pulmonary Disease (COPD) Research、Pediatric health and respiratory diseases

The lung microbiome impacts lung function, making any smoking-induced changes in the lung microbiome potentially significant. The complex co-occurrence and co-avoidance patterns between the bacterial taxa in the LRT microbiome were explored for a cohort of active (AS), former (FS), and never (NS) smokers. Bronchoalveolar lavages (BAL) were collected from 55 volunteer subjects (nine NS, 24 FS, and 22 AS). The LRT microbiome composition was assessed using 16S rRNA amplicon sequencing. Identification of differentially abundant taxa, co-occurrence patterns, discriminant analysis, and biomarker inferences were performed. The data show that smoking results in a loss in the diversity of the lower respiratory tract (LRT) microbiome, change in the co-occurrence patterns, and a weakening of the tight community structure present in healthy microbiomes. The increased abundance of Ralstonia taxa in the lung microbiomes of both former and active smokers is significant. Partial least square discriminant and DESeq2 analyses suggested a compositional difference between the cohorts in the LRT microbiome. The groups were sufficiently distinct from each other, suggesting that cessation of smoking may not be sufficient for the lung microbiota to return to a composition similar to that of never smokers. The LEfSe analyses identified several bacterial taxa as potential biomarkers of smoking status. Network-based clustering analysis highlighted different co-occurring and co-avoiding microbial taxa i...