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Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms

ABSTRACT: Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms

PROVIDER: PRJNA1112870 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29070628.fastq.gz	Fastqsanger.gz
	SRR29070629.fastq.gz	Fastqsanger.gz
	SRR29070630.fastq.gz	Fastqsanger.gz
	SRR29070631.fastq.gz	Fastqsanger.gz
	SRR29070632.fastq.gz	Fastqsanger.gz

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Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms III

Project description:Severe lung injury requiring mechanical ventilation may lead to secondary fibrosis. Senescence, a cell response characterized by cell cycle arrest and a shift towards a proinflammatory/profibrotic phenotype, is one of the mechanisms involved in lung fibrosis. Here, we explore the contribution of mechanical stretch to senescence of the alveolar epithelium and its link with fibrosis. Human alveolar cells and fibroblasts were exposed in vitro to mechanical stretch, and senescence assessed. In addition, fibroblasts were exposed to culture media preconditioned by senescent epithelial cells and their activation was studied. Transcriptomic profiles from stretched, senescent epithelial cells and activated fibroblasts were combined to identify potential activated pathways. Finally, the senolytic effects of digoxin were tested in these models. Mechanical stretch induced senescence in alveolar epithelial cells, but not in fibroblasts. This stretch-induced senescence has specific features compared to senescence induced by doxorubicin. Fibroblasts were activated after exposure to supernatants conditioned by epithelial senescent cells. Transcriptomic analyses revealed notch signaling as a potential responsible for the epithelial-mesenchymal crosstalk, as fibroblast activation was inhibited by treatment with an inhibitor of g-secretase. Treatment with digoxin reduced the percentage of senescent cells after stretch and ameliorated the fibroblast response to preconditioned media. These results suggest that lung fibrosis in response to mechanical stretch may be caused by the paracrine effects of senescent alveolar cells. This pathogenetic mechanism can be pharmacologically manipulated to improve lung repair.

2025-03-25 | GSE267787 | GEO

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms II

2025-03-25 | GSE267784 | GEO

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms I

2025-03-25 | GSE267782 | GEO

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms I

Project description:Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms I

| PRJNA1112866 | ENA

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms II

Project description:Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms II

| PRJNA1112876 | ENA

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms III

Project description:Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms III

| PRJNA1112877 | ENA

miR-19b mediates lung epithelial-mesenchymal transition via PTEN signaling in response to mechanical stretch

Project description:Alveolar epithelial type II (AEII) cells are the first line host in response to mechanical ventilation. We tested the hypothesis that the modulation of microRNA on AEII cells in response to mechanical stretch may participate in the ventilator-induced lung injury. This experiment is designed to screen miRNAs that are deregulated during mechanical stretch of AEII cells.

2015-11-18 | GSE75100 | GEO

Mechanical stretch induces senescence of alveolar epithelial cells and drives fibroblast activation by paracrine mechanisms

Project description:This SuperSeries is composed of the SubSeries listed below.

2025-03-25 | GSE267788 | GEO

The ion channel Trpc6a regulates the cardiomyocyte regenerative response to mechanical stretch

Project description:Myocardial damage caused for example by cardiac ischemia leads to ventricular volume overload resulting in increased stretch of the remaining myocardium. In adult mammals, these changes trigger an adaptive cardiomyocyte hypertrophic response which, if the damage is extensive, will ultimately lead to pathological hypertrophy and heart failure. Conversely, in response to extensive myocardial damage, cardiomyocytes in the adult zebrafish heart and neonatal mice proliferate and completely regenerate the damaged myocardium. We therefore hypothesized that in adult zebrafish, changes in mechanical loading due to myocardial damage may act as a trigger to induce cardiac regeneration. Based, on this notion we sought to identify mechanosensors which could be involved in detecting changes in mechanical loading and triggering regeneration. Here we show using a combination of knockout animals, RNAseq and in vitro assays that the mechanosensitive ion channel Trpc6a is required by cardiomyocytes for successful cardiac regeneration in adult zebrafish. Furthermore, using a cyclic cell stretch assay, we have determined that Trpc6a induces the expression of components of the AP1 transcription complex in response to mechanical stretch. Our data highlights how changes in mechanical forces due to myocardial damage can be detected by mechanosensors which in turn can trigger cardiac regeneration.

2023-12-20 | E-MTAB-13603 | biostudies-arrayexpress

Cyclic mechanical stretch-induced gene expression

Project description:With gene expression profiling it was aimed to identify the differentially expressed genes associated with the regulation of the cytoskeleton to investigate the stretch-induced cell alignment mechanism. A whole genome microarray based analysis of the stretch-induced gene expression changes was done. Gene expression was measured at the beginning of the alignment process showing first reoriented cells after 5 h stretching and at the end after 24 h, where nearly all cells are aligned. Cyclic mechanical stretching of cells results in cellular alignment perpendicular to the stretch direction regulating cellular response. This stress response is assumed to be an adaptation mechanism to reduce extensive stretching but also acts as architectural restructuring changing performance and biomechanics of the tissue. Gene expression profiling of control vs. stretched primary human dermal fibroblasts after 5 h and 24 h demonstrated the regulation of differentially expressed genes associated with metabolism, differentiation and morphology. Primary human dermal fibroblasts from ten donors were cultured on Bioflex culture plates and stretched for 5h and 24 h or left untreated to avoid changes according to cell culturing. Each of the subject provided 4 samples (control/treated and 5hrs/24hrs) resulting in 40 samples total.

2014-06-11 | E-GEOD-58389 | biostudies-arrayexpress

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