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- W3046195229 abstract "Lung injury in mice induces mobilization of discrete subsets of epithelial progenitor cells to promote new airway and alveolar structures. However, whether similar cell types exist in human lung remains unresolved. Using flow cytometry, we identified a distinct cluster of cells expressing the epithelial cell adhesion molecule (EpCAM), a cell surface marker expressed on epithelial progenitor cells, enriched in the ecto-5′-nucleotidase CD73 in unaffected postnatal human lungs resected from pediatric patients with congenital lung lesions. Within the EpCAM + CD73 + population, a small subset coexpresses integrin β4 and HTII-280. This population remained stable with age. Spatially, EpCAM + CD73 + cells were positioned along the basal membrane of respiratory epithelium and alveolus next to CD73 + cells lacking EpCAM. Expanded EpCAM + CD73 + cells give rise to a pseudostratified epithelium in a two-dimensional air–liquid interface or a clonal three-dimensional organoid assay. Organoids generated under alveolar differentiation conditions were cystic-like and lacked robust alveolar mature cell types. Compared with unaffected postnatal lung, congenital lung lesions were marked by clusters of EpCAM + CD73 + cells in airway and cystic distal lung structures lined by simple epithelium composed of EpCAM + SCGB1A1 + cells and hyperplastic EpCAM + proSPC + cells. In non-small-cell lung cancer (NSCLC), there was a marked increase in EpCAM + CD73 + tumor cells enriched in inhibitory immune checkpoint molecules CD47 and programmed death-ligand 1 (PD-L1), which was associated with poor survival in lung adenocarcinoma (LUAD). In conclusion, EpCAM + CD73 + cells are rare novel epithelial progenitor cells in the human lung. Importantly, reemergence of CD73 in lung adenocarcinoma enriched in negative immune checkpoint molecules may serve as a novel therapeutic target." @default.
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- W3046195229 date "2020-11-01" @default.
- W3046195229 modified "2023-10-16" @default.
- W3046195229 title "EpCAM<sup>+</sup>CD73<sup>+</sup> mark epithelial progenitor cells in postnatal human lung and are associated with pathogenesis of pulmonary disease including lung adenocarcinoma" @default.
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- W3046195229 doi "https://doi.org/10.1152/ajplung.00279.2019" @default.
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