PMN‐MDSCs Orchestrate the Immunosuppressive Microenvironment in the Lung and Are Associated With Clinical Outcome in Bronchiectasis

These findings suggest that PMN-MDSCs accumulate and establish an immunosuppressive microenvironment in the lung via ARG-1 in bronchiectasis, which is associated with clinical outcome and response to antibiotic treatment, highlighting a potential role of PMN-MDSCs in bronchiectasis progression.