Hedgehog-Responsive PDGFRa(+) Fibroblasts Maintain a Unique Pool of Alveolar Epithelial Progenitor Cells during Alveologenesis

Scientists showed that during alveologenesis, Hedgehog-responsive PDGFRa(+) progenitors were a source of secreted trophic molecules that maintained a unique lung alveolar type 2 progenitor population.