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- W4225375105 abstract "Epithelial polyploidization after injury is a conserved phenomenon recently shown to improve barrier restoration during wound healing. Whether lung injury can induce alveolar epithelial polyploidy is not known. We show that bleomycin injury induces alveolar type 2 cell (AT2) hypertrophy and polyploidy. AT2 polyploidization is also seen in short term ex vivo cultures, where AT2-to-AT1 transdifferentiation is associated with substantial binucleation due to failed cytokinesis. Both hypertrophic and polyploid features of AT2 cells can be attenuated by inhibiting the integrated stress response using the small molecule ISRIB. These data suggest that AT2 hypertrophic growth and polyploidization may be a feature of alveolar epithelial injury. Because AT2 cells serve as facultative progenitors for the distal lung epithelium, a propensity for injury-induced binucleation has implications for AT2 self-renewal and regenerative potential upon reinjury, which may benefit from targeting the integrated stress response." @default.
- W4225375105 created "2022-05-05" @default.
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- W4225375105 date "2022-05-01" @default.
- W4225375105 modified "2023-10-16" @default.
- W4225375105 title "Lung Injury Induces Alveolar Type 2 Cell Hypertrophy and Polyploidy with Implications for Repair and Regeneration" @default.
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- W4225375105 doi "https://doi.org/10.1165/rcmb.2021-0356oc" @default.
- W4225375105 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35202558" @default.
- W4225375105 hasPublicationYear "2022" @default.
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