Endothelial-Derived CCL7 Promotes Macrophage Polarization and Aggravates Septic Acute Lung Injury via CCR1-Mediated STAT1 Succinylation.

ABSTRACT: Acute lung injury (ALI) is a significant complication of sepsis, wherein the interaction between pulmonary vascular endothelial cells and immune cells plays a pivotal role in the pathogenesis. In this study, it is demonstrated that secretion of chemokine C-C motif ligand 7 (CCL7) by endothelial cells (ECs) induces metabolic reprogramming and M1 polarization of C-C motif chemokine receptor 1-positive (CCR1⁺) macrophages. It is noteworthy that mice with specific inhibition of endothelial-derived CCL7 exhibit reduced severity of septic ALI, underscoring the critical role of CCL7 in the progression of sepsis. Mechanistically, activation of the CCL7-CCR1 axis enhances STAT1 succinylation through upregulation of KAT2A expression, leading to increased STAT1 binding to the promoter of glycolytic g

SUBMITTER: Li X 

PROVIDER: S-EPMC12520477 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature