Project description:Idiopathic pulmonary fibrosis (IPF) is the prototypic progressive fibrotic lung disease with a median survival of 2-4 years. Injury to and/or dysfunction of alveolar epithelium are strongly implicated in IPF disease initiation, but what factors determine why fibrosis progresses rather than normal tissue repair occurs remain poorly understood. We previously demonstrated that ZEB1-mediated epithelial-mesenchymal transition (EMT) in human alveolar epithelial type II (ATII) cells augments TGF-β-induced profibrogenic responses in underlying lung fibroblasts by paracrine signalling. Here we investigated bi-directional epithelial-mesenchymal crosstalk and its potential to drive fibrosis progression. RNA sequencing (RNA-seq) of lung fibroblasts exposed to conditioned media from ATII cells undergoing RAS-induced EMT identified many differentially expressed genes including those involved in cell migration and extracellular matrix (ECM) regulation. We confirmed that paracrine signalling between AS-activated ATII cells and fibroblasts augmented fibroblast recruitment and demonstrated that this involved a ZEB1-tissue plasminogen activator (tPA) axis. In a reciprocal fashion, paracrine signalling from TGF-β-activated lung fibroblasts or IPF fibroblasts induced RAS activation in ATII cells, at least partially via the secreted protein, SPARC. Together these data identify that aberrant bi-directional epithelial-mesenchymal crosstalk in IPF drives a chronic feedback loop that maintains a wound-healing phenotype and provides self-sustaining pro-fibrotic signals.

2021-08-19 | PXD025821 | Pride

Comparison of Azithromycin treated and non-treated human lung fibroblasts

Project description:Azithromycin has been shown to have anti-fibrotic effects on idiopathic lung fibroblasts (IPF). We thus wanted to investigate involved genes and pathways by microarray analysis. We treated normal human lung fibroblasts with Azithromycin (50uM) for 24h and compared them to non-treated samples.

2019-11-07 | E-MTAB-8488 | biostudies-arrayexpress

Gene expression in lung fibroblasts

Project description:Pulmonary fibrosis is a chronic, progressive, and lethal interstitial lung disease. It is characterized by extracellular matrix deposition, fibroblast proliferation, and accumulation. Fibroblasts from normal or UIP histology were cultured and analyzed. Keywords: Fibroblasts from normal histology lung tissue or UIP histology lung tissue

2009-03-19 | GSE10921 | GEO

Homo sapiens

Project description:Expression data from cultured human esophageal squamous cell carcinoma cell lines and cultured human fibroblasts.

| PRJNA269575 | ENA

Integration of genome-wide DNA methylome and transcriptome of human intestinal fibroblasts reveals novel candidate gene signatures in Crohnâs disease-associated fibrosis

Project description:Tissue fibrosis is a serious complication of Crohnâs disease (CD) as well as of a variety of other complex, chronic pathologies. Understanding the underlying pathophysiology of tissue fibrosis is crucial for the development of tissue-specific prevention and interventional treatment strategies. To identify molecular states specific to fibrotic disease, we employed deep sequencing to define the genome-wide DNA methylome and the whole transcriptome of purified human intestinal fibrotic fibroblasts (HIFs) isolated from the colon of patients with fibrotic CD. Integration of this information, via computational tools, identified candidate molecular interactions that could lead to fibrosis pathology. Our definition of a genome-wide fibrosis-specific DNA methylome provides a new paradigm for understanding mechanisms of pathological gene expression that lead to intestinal fibrosis and may have relevance to fibrogenesis in other organs. Human intestinal fibroblasts (HIFs) were extracted and cultured from colon specimens of two groups: Crohnâs disease with associated fibrosis (n=3) and normal fibroblasts from patients with Diverticulitis (n=3). Both RNA-seq and MBD-isolated genome sequencing (MiGS) were performed on every sample.

2016-03-22 | E-GEOD-67250 | biostudies-arrayexpress

Genome wide chromatin accessibilty changes associated with JUN expression in human normal and IPF lung fiborblasts

Project description:We found that JUN expression is increased in many human fibrotic diseases and that systemic induction of Jun in mice resulted in development of fibrosis of multiple organs. To identify the changes in chromatin accessibility associated with JUN, we worked with primary human fibrotic lung fibroblasts that have normal or Knock-out levels of JUN expression and performed ATAC-seq analysis in both of them. Meanwhile we also modified primary human normal lung fibroblasts with or without JUN over-expression induction, then processed ATAC-seq and ChIP-seq analysis.

2020-04-27 | GSE114844 | GEO

Homo sapiens

Project description:Transcriptome analysis of normal human lung fibroblasts (NHLFs) following TBX4 knockdown.

| PRJNA381149 | ENA