TREM2 promotes lung fibrosis via controlling alveolar macrophage survival and pro-fibrotic activity.

ABSTRACT: Lung macrophages play a pivotal role in pulmonary fibrosis, with monocyte-derived alveolar macrophages driving disease progression. However, the mechanisms regulating their pro-fibrotic behavior and survival remain unclear, and effective therapeutic strategies are lacking. Here we show that triggering receptors expressed on myeloid cells 2 are predominantly expressed on monocyte-derived alveolar macrophages in fibrotic mouse lungs and are significantly elevated in lung macrophages from patients with idiopathic pulmonary fibrosis. Deletion or knockdown of this receptor disrupts intracellular survival signaling, promotes macrophage apoptosis, and attenuates their pro-fibrotic phenotype. We further demonstrate that a lipid mediator and a high-avidity ligand of this receptor, encountered by ma

SUBMITTER: Cui H 

PROVIDER: S-EPMC11840137 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature