Longitudinal tracking of the cystic fibrosis airway metagenome
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PROVIDER: PRJEB50802 | ENA |
REPOSITORIES: ENA
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Project description:Our laboratory has held a long interest in the glycosylation changes seen on the surface of airway epithelia of patients with the disease cystic fibrosis (CF). Experiments from our laboratory have detailed a CF glycosylation phenotype of increased Fuca1,3/4 and decreased Fuca1,2 and sialic acid on the surfaces of immortalized and primary CF cells compared to non-CF cells. Further, we have shown that gene transfer and subsequent expression of a wild type CF plasmid in CF airway cells results in correction or reversal of this glycosylation phenotype. We hypothesize that the changes in glycosylation seen in CF cells are key in the pathophysiology of the cystic fibrosis airway disease. For example, it has been shown that Pseudomonas aeruginosa, a bacterium that has a predilection for colonizing CF airways, adheres to asialylated glycolipids and glycoconjugates with terminal Fuca1,3/4. One focus of our laboratory is to elucidate the etiology of the glycosylation changes seen in CF cells and the mechanism by which these changes are reversed by wild type CFTR gene transfer. We propose to study the gene expression of immortalized and primary CF and non-CF airway epithelial cells: 1. CF/T43 vs. BEAS-2B cells. These are two widely used immortalized airway cell lines that we have used extensively in the past. 2. C38 cells; C38 cells are IB3 cells expressing wtCFTR. The experimental focus is to elucidate the etiology of the glycosylation changes seen in Cystic Fibrosis (CF) cells and the mechanism by which these changes are reversed by wild type CFTR gene transfer. To do so, the gene expression of immortalized and primary CF and non-CF airway epithelial cells were compared and studied. Cell lines used were CF/T43 and BEAS-2B, both widely used immortalized airway cell lines. Other cell lines studied included C38 cell lines (clonal derivatives of IB3 cells expressing wtCFTR).
2011-01-07 | E-GEOD-26482 | biostudies-arrayexpress
Project description:Our laboratory has held a long interest in the glycosylation changes seen on the surface of airway epithelia of patients with the disease cystic fibrosis (CF). Experiments from our laboratory have detailed a CF glycosylation phenotype of increased Fuca1,3/4 and decreased Fuca1,2 and sialic acid on the surfaces of immortalized and primary CF cells compared to non-CF cells. Further, we have shown that gene transfer and subsequent expression of a wild type CF plasmid in CF airway cells results in correction or reversal of this glycosylation phenotype. We hypothesize that the changes in glycosylation seen in CF cells are key in the pathophysiology of the cystic fibrosis airway disease. For example, it has been shown that Pseudomonas aeruginosa, a bacterium that has a predilection for colonizing CF airways, adheres to asialylated glycolipids and glycoconjugates with terminal Fuca1,3/4. One focus of our laboratory is to elucidate the etiology of the glycosylation changes seen in CF cells and the mechanism by which these changes are reversed by wild type CFTR gene transfer.
2011-01-07 | GSE26482 | GEO
Project description:The purpose of the study is to compare the transcriptomic profile of the airway epithelium generated from bronchial airway epithelial cells isolated from healthy donors (NCF) and patients with cystic fibrosis (CF). Cells were grown at the air-liquid interface for at least 2-months. CF is caused by mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Only patients homozygous for the F508del mutation of the CFTR gene were considered. The reconstituted airway epithelium was mechanically wounded and allowed to repair with time. We considered four steps: 1) intact, non-wounded (NW) epithelium; 2) 24h hours post-wounding (pW); 3) time at which the wound is closed (WC); 4) two days post-wound closure (pWC). We also mimicked infection by exposing the cells to Pseudominas aeruginosa flagelin for NW and WC conditions.
2019-10-08 | GSE127696 | GEO
Project description:Cystic fibrosis (CF) is a life-shortening disease caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Although bacterial lung infection and the resulting inflammation cause most of the morbidity and mortality, how loss of CFTR first disrupts airway host defense has remained uncertain. We asked what abnormality impairs elimination when a bacterium lands on the pristine surface of a newborn CF airway? To investigate this defect, we interrogated the viability of individual bacteria immobilized on solid grids and placed on the airway surface. As a model we studied CF pigs, which spontaneously develop hallmark features of CF lung disease. At birth, their lungs lack infection and inflammation, but have a reduced ability to eradicate bacteria. Here we show that in newborn wild-type pigs, the thin layer of airway surface liquid (ASL) rapidly killed bacteria in vivo, when removed from the lung, and in primary epithelial cultures. Lack of CFTR reduced bacterial killing. We found that ASL pH was more acidic in CF, and reducing pH inhibited the antimicrobial activity of ASL. Reducing ASL pH diminished bacterial killing in wild-type pigs, and increasing ASL pH rescued killing in CF pigs. These results directly link the initial host defense defect to loss of CFTR, an anion channel that facilitates HCO3- transport. Without CFTR, airway epithelial HCO3- secretion is defective, ASL pH falls and inhibits antimicrobial function, and thereby impairs killing of bacteria that enter the newborn lung. These findings suggest that increasing ASL pH might prevent the initial infection in patients with CF and that assaying ASL pH or bacterial killing could report on the benefit of therapeutic interventions. 11 samples of trachea primary airway epithelial cultures representing CFTR+/+ and CFTR-/- pigs. Pig samples representing 14 bronchus and 12 trachea tissue samples submitted in GSE21071.
2012-03-29 | E-GEOD-36906 | biostudies-arrayexpress
Project description:This multi-center study will compare multi-target DNA and quantitative FIT stool-based testing to colonoscopy in individuals with Cystic Fibrosis (CF) undergoing colon cancer screening with colonoscopy. The primary endpoint is detection of any adenomas, including advanced adenomas and colorectal cancer (CRC).
| 2726863 | ecrin-mdr-crc
Project description:The goal of this study was to examine changes in gene expression over time in healthy and cystic fibrosis (CF) human airway epithelia infected with RSV.
2023-11-08 | GSE247298 | GEO
Project description:In vitro cultures of primary human airway epithelial cells (hAECs) grown at air-liquid interface have become a valuable tool to study airway biology and physiology and for drug discovery in lung diseases such as Cystic Fibrosis (CF). An increasing number of different differentiation media, are now available, making comparison of data between studies difficult. Here we investigated the impact of two common differentiation media on the transcriptome features of CF and non-CF epithelia. RNA-sequencing analysis found 20330 and 19052 transcripts in CF and NCF epithelia, respectively and revealed that 1346 genes were significantly regulated in CF cells compared to 922 in NCF cells.
2020-09-22 | GSE154905 | GEO
Project description:CF's physiopathology is poorly explained by the mutation alone. The oxydative stress could be a major factor of this illness . Study its impact on transcriptome's CF cell line could be ameliorate our understanding of the evolution of cystic fibrosis. we used microarray technology to evaluate under oxydative stress, the transcriptional state of an epithelial lung cell issued from a human with cystic fibrosis and to identify a set of modulated genes associated to survival cell processes. the two cell lines are cultivated to Air-liquid Interface for RNA extraction and hybridization on Affymetrix microarrays. Each condition is triplicated. For the oxidative stress conditions, the two cell lines are treated on apical site by 15 µl of DMNQ (2,3-dimethoxy-1,4-naphtoquinone) ,concentrated at 15 µM, during 24 hours before RNA extraction.
2012-08-02 | E-GEOD-39843 | biostudies-arrayexpress
Project description:CF's physiopathology is poorly explained by the mutation alone. The oxydative stress could be a major factor of this illness . Study its impact on transcriptome's CF cell line could be ameliorate our understanding of the evolution of cystic fibrosis. we used microarray technology to evaluate under oxydative stress, the transcriptional state of an epithelial lung cell issued from a human with cystic fibrosis and to identify a set of modulated genes associated to survival cell processes.
2012-08-03 | GSE39843 | GEO
Project description:Cystic fibrosis (CF) is one of the commonest lethal genetic diseases in which the role of microRNAs (miRNAs) has yet to be explored. We hypothesized that unique miRNA expression profiles exist in CF versus non-CF bronchial epithelial cells so the our aim was to investigate whether unique miRNA expression profiles exist in CF, particularly in CF bronchial epithelial cells and explore their effects on influencing signaling pathways. The expression of 667 miRNAs were measured in bronchial brushings from individuals with and without cystic fibrosis (CFn=5, non-CF n=5). The 5 CF patient samples have been normalised to the controls so we get a final normalised value for 5 samples only. There are 2 raw data files for samples and controls as there are two cards A and B ran for each sample, for a total of 4 raw data files available on the Series record.
2010-03-22 | E-GEOD-19431 | biostudies-arrayexpress