Alveolar stem cells go beyond making gas-exchange cells to repair damaged airways

Alveolar type 2 (AT2) cells are the stem cells of the lung’s air sacs and are responsible for maintaining alveolar structure and gas exchange. A study that tracked AT2 cells shows that, after injury to the airway, they can also migrate between lung compartments and become bronchiolar cells to help repair damaged airways. Alveolar type 2 cells can migrate from the lung’s air sacs into the airways to repair damage there.