ABSTRACT: Microbiome in acute exacerbation and stable phase of COPD: a descriptive and comparative study of 16s rRNA sequencing and metagenomic sequencing
Project description:To further unravel the potential molecular mechanisms involved in the loss of muscle function during an acute exacerbation, a cross-sectional microarray study was designed to compare the gene expression profile of the vastus lateralis muscle in patients with an acute COPD exacerbation and in stable COPD patients. Keywords: cross-sectional patient study A cross-sectional microarray study was designed. The microarray screening was performed on a vastus lateralis biopsy obtained from 4 patients with an acute COPD exacerbation and 5 stable COPD patients. No replicates or dye-swaps were included.
Project description:To further unravel the potential molecular mechanisms involved in the loss of muscle function during an acute exacerbation, a cross-sectional microarray study was designed to compare the gene expression profile of the vastus lateralis muscle in patients with an acute COPD exacerbation and in stable COPD patients. Keywords: cross-sectional patient study
Project description:Characterizing the bacterial community in sequential ( stable, exacerbation and post-exacerbation) COPD sputum samples using 454GS-FLX .
| PRJEB12565 | ENA
Project description:Microbiome in acute exacerbation and stable phase of COPD: a descriptive and comparative study of 16s rRNA sequencing and metagenomic sequencing
Project description:Long-term, low dose azithromycin reduces exacerbation frequency in COPD yet the mechanism remains unclear. This study characterises changes to gene expression in patients with neutrophilic COPD in response to long term low dose azithromycin therapy. Patients with neutrophilic COPD (>61% or >162x10^4/mL sputum neutrophils) were randomised to 12 weeks of either azithromycin or placebo treatment. RNA was extracted from sputum and blood collected before (pre) and after (post) treatment.
Project description:In idiopathic pulmonary fibrosis (IPF) and chronic obstructive pulmonary disease (COPD), epithelial abnormalities are present including bronchiolization and alveolar cell death and dysfunction. As epithelial progenitor cells are directed by their microenvironment, we hypothesized that changes in the microenvironment disrupt normal epithelial growth and differentiation. We therefore mimicked the soluble factor microenvironment in IPF using an IPF cocktail (IPFc), composed of 9 factors which are increased in IPF lungs (CCL2, IL-1β, IL-4, IL-8, IL-13, IL-33, TGF-β, TNFα and TSLP) and in COPD exacerbations using an exacerbation cocktail (EC) composed of 4 factors that are increased during an exacerbation of COPD (TNFα, IL-1β, IL-6, IL-8). We asked whether the soluble factor milieu in IPF and COPD exacerbations affects epithelial growth and differentiation. Mouse lung organoids (primary EpCAM+ cells co-cultured with CCL206 fibroblasts) were used to study epithelial growth and differentiation. Organoids exposed to IPFc, EC or TGF-β (as a comparator) were resorted into EpCAM+ and CCL206 fractions, and subjected to RNA-sequencing.
Project description:Comparison of severely emphysematous tissue removed at lung volume reduction surgery to that of normal or mildly emphysematous lung tissue resected from smokers with nodules suspicious for lung cancer. Data obtained from the 18 patients with severe emphysema and 12 patients with mild/no emphysema. Research may provide insights into the pathogenetic mechanisms involved in chronic obstructive pulmonary disease (COPD). Keywords: other
