A Pseudomonas aeruginosa quorum-sensing metabolite manipulates macrophage ferroptosis through a methylation pathway.

ABSTRACT: Ferroptosis is a type of iron- and lipid peroxidation-dependent programmed cell death that is involved in various diseases. Some pathogens manipulate host ferroptosis for pathogenesis; however, the potential mechanisms of action remain unclear. Pseudomonas aeruginosa is an opportunistic pathogen that relies on iron for its virulence, biofilm formation, and survival. Here, we report that P. aeruginosa employs the quorum-sensing metabolite, Pseudomonas quinolone signal (PQS), to induce ferroptosis in macrophages through a carnosine-N-methyltransferase (CNMT)-transferrin receptor 1 (TFR1) methylation pathway. Specifically, PQS promotes iron-dependent lipid peroxidation to induce ferroptosis in macrophages. Using high-resolution mass spectrometry-based cellular thermal shift assay (MS-CETSA)/t

SUBMITTER: Jia T 

PROVIDER: S-EPMC12615762 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature