Bone Marrow Mesenchymal Stem Cell‐Derived Exosomal miR‐451a Inhibits Macrophage M1 Polarization Through the TLR4/PI3K/AKT Signaling Pathway to Alleviate Acute Lung Injury
Background Abnormal polarization of macrophages toward the M1 phenotype is a key pathogenic mechanism in acute lung injury (ALI). Bone marrow mesenchymal stem cell (MSC)‐derived exosomes (BMSC‐Exos) represent a promising therapeutic approach to inhibit macrophage M1 polarization and alleviate ALI, but the molecular med...