Study reveals new mechanism of lung tissue regeneration

New research performed in mice models at Penn Medicine shows, mechanistically, how the infant lung regenerates cells after injury differently than the adult lung, with alveolar type 1 (AT1) cells reprograming into alveolar type 2 (AT2) cells (two very different lung alveolar epithelial cells), promoting cell regeneration, rather than AT2 cells differentiating into AT1 cells, which is the most widely accepted mechanism in the adult lung. These study findings, published today in Cell Stem Cell, show that the long-held assumption that AT1 and AT2 cells behave the same way in children and in adults is untrue.

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