Single cell transcriptome analysis of bleomycin injured distal adult murine lung airway epithelium
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PROVIDER: PRJNA533796 | ENA |
REPOSITORIES: ENA
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Project description:To comprehensively study the heterogeneity within distal airway epithelium, we performed single cell transcriptomic analysis of the naive lung samples. Our analysis reveals that distal lung airway epithelial cells are highly heterogenous. We employed supervised clustering to identify a rare group of cells with transcriptional similiarities to embryonic distal lung bud tip progenitors. This approach identified a quiescent progenitor population of airway cells that accounted for all in vitro regenerative activity. Furthermore, these cells were also required for in vivo transplantation, reconstitution of alveoli, and functional recovery of injured mice. These findings indicate that small subpopulations of specialized stem/progenitors are required for effective lung regeneration and could potentially be used as therapeutic adjuncts after major lung injury.
2020-01-23 | GSE130077 | GEO
Project description:Bleomycin-injured alveolospheres
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Project description:To comprehensively study the heterogeneity within distal airway epithelium, we performed single cell transcriptomic analysis of the naive lung samples. Our analysis reveals that distal lung airway epithelial cells are highly heterogenous. We employed supervised clustering to identify a rare group of cells with transcriptional similiarities to embryonic distal lung bud tip progenitors. This approach identified a quiescent progenitor population of airway cells that accounted for all in vitro regenerative activity. Furthermore, these cells were also required for in vivo transplantation, reconstitution of alveoli, and functional recovery of injured mice. These findings indicate that small subpopulations of specialized stem/progenitors are required for effective lung regeneration and could potentially be used as therapeutic adjuncts after major lung injury.
2020-01-23 | GSE129937 | GEO
Project description:The proximal-distal patterning program determines unique structural and functional properties of proximal and distal airways in the adult lung. Based on the knowledge that remod-eling of distal airways is the major pathologic feature of chronic obstructive pulmonary disease (COPD), and that small airway epithelium (SAE), which covers distal airways, is the primary site of the initial smoking-induced changes relevant to COPD pathogenesis, we hypothesized that in COPD smokers, the SAE transcriptome loses its region-specific biologic identity and takes on the transcriptional pattern of the proximal airways. By analyzing human airway epithelium col-lected by bronchoscopic brushings from proximal and distal airways of healthy smokers, proxi-mal and distal airway epithelial transcriptome signatures were identified. Dramatic smoking-dependent suppression of distal signature paralleled by acquisition of the proximal airway epithe-lial phenotype was found in the SAE of COPD smokers. Distal-proximal re-patterning observed in the SAE of smokers in vivo was reproduced in vitro by stimulating SAE basal cells (BC), the stem/progenitor cells of the SAE, with EGF, a growth factor up-regulated in airway epithelium by smoking. Together, this study identifies distal-proximal SAE re-patterning as a characteristic feature of small airway disordering in COPD smokers potentially driven by EGF/EGFR-mediated reprogramming of SAE BC stem/progenitor cells.
2017-07-18 | GSE64614 | GEO
Project description:To comprehensively study the heterogeneity within distal airway epithelium, we performed single cell transcriptomic analysis of the normal human donor lung samples. Our analysis reveals that secretory (club) and basal cells in the distal lung airway epithelial cells are highly heterogenous. Further interrogation of secretory cells identified a subpopulation with potential for alveolar differentiation in vitro, implicating distal lung airway secretory cells as new candidates in alveolar repair and regeneration.
2021-12-10 | GSE130076 | GEO
Project description:Single cell transcriptome analysis of distal adult murine lung airway epithelium
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Project description:Proteomic analysis of injured human peripheral nerves, particularly focusing on events occurring in the proximal and distal nerve ends, remains relatively underexplored. This study aimed to investigate the molecular patterns underlying a digital nerve injury, concentrating on differences in protein expression between the proximal and distal nerve ends. A total of 26 human injured digital nerve samples (24 men; 2 women; median age 47 [30-66] years), harvested during primary nerve repair within 48 hours post-injury from proximal and distal nerve ends, were analyzed using mass spectrometry. A total of 3914 proteins were identified, with 127 proteins showing significant differences in abundance between the proximal and the distal nerve ends. The downregulation of proteins in the distal nerve end was associated with synaptic transmission, autophagy, neurotransmitter regulation, cell adhesion and migration. Conversely, proteins upregulated in the distal nerve end were implicated in cellular stress response, neuromuscular junction stability and muscle contraction, neuronal excitability and neurotransmitter release, synaptic vesicle recycling and axon guidance and angiogenesis. Investigation of proteins, with functional annotations analysis, in proximal and the distal ends of human injured digital nerves, revealed dynamic cellular responses aimed at promoting tissue degeneration and restoration, while suppressing non-essential processes.
2024-07-19 | PXD051266 | Pride
Project description:Although airway epithelia are primarily devoted to gas exchange, they have to fulfil a number of different tasks including organ maintenance and the epithelial immune response to fight airborne pathogens. These different tasks are at least partially accomplished by specialized cell types in the epithelium. In addition, a proximal to distal gradient mirroring the transition from airflow conduction to real gas exchange, is also operative. We analysed the airway system of larval Drosophila melanogaster with respect to region-specific expression in the proximal to distal axis. The larval airway system is made of epithelial cells only. Previously, it had been anticipated that these cells are very similar in their functional and transcript properties. We found differential expression between primary trunks of the airways and more distal ones comprising secondary and tertiary ones. Among these genes are especially those involved in signal transduction. A more detailed analysis was performed using DNA-microarray analyses to identify cohorts of genes that are either predominantly expressed in the primary or in the secondary/tertiary parts of the airways. Genes, including a putative mucin and the neuropeptide FMRFamide are predominantly found in primary branches, whereas the wnt- and the TGF-beta signalling pathways appear to be overrepresented in the secondary/tertiary ones. This differential expression is indicative for a proximal to distal transcriptional regionalization presumably reflecting functional differences in these parts of the flyM-bM-^@M-^Ys airway system. Trachea of wildtype L3 larvae were dissected and primary branches were processed seperately from secondary and tertiary branches. 3 biological replicates were included per group.
2014-04-01 | E-GEOD-53273 | biostudies-arrayexpress
Project description:Idiopathic pulmonary fibrosis (IPF) is a complex disease involving various cell types. Macrophages are essential in maintenance of physiological homeostasis, wound repair and fibrosis in the lung. Macrophages play a crucial role in repair and remodeling by altering their phenotype and secretory pattern in response to injury. The secretome of induced pluripotent stem cells (iPSC-cm) attenuates injury and fibrosis in bleomycin injured rat lungs. In the current study, we evaluate the effect of iPSC-cm on interstitial macrophage gene expression and phenotype in bleomycin injured rat lungs in vivo. Â iPSC-cm was intratracheally instilled 7 days after bleomycin induced lung injury and assessed 7 days later and single cell isolation was performed. Macrophages were FACS sorted and microarray analysis was performed. We characterized changes in the rat lung interstitial macrophages using transcriptional profiling.
2017-03-20 | E-MTAB-5619 | biostudies-arrayexpress
Project description:Airway Epithelium and Model Systems
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