Scientists just found the lung’s hidden self-healing switch

Mayo Clinic researchers discovered a molecular "switch" in lung cells that controls whether they repair tissue or fight infection, but cannot do both simultaneously. The switch involves three key regulators, including C/EBPα, which acts like a clamp preventing cells from behaving like stem cells. This finding explains why infections slow lung recovery and why regeneration fails in diseases like pulmonary fibrosis and COPD. The discovery could lead to new treatments that enhance the lung's natural repair mechanisms.