Type 2 Inflammation-Biased Arachidonic Acid Metabolite Regulates Mucosal Remodeling of Chronic Rhinosinusitis With Nasal Polyps - PubMed
3 hours ago
- #chronic rhinosinusitis
- #mucosal remodeling
- #type 2 inflammation
- Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common inflammatory respiratory disease, with the eosinophilic subtype (ECRSwNP) presenting particular challenges due to type 2 inflammation, mucosal edema, and stromal remodeling.
- Metabolomics studies identified 15(S)-HETE, an ALOX15-dependent metabolite derived from arachidonic acid, as correlating with CRSwNP severity. It reduces TGF-β1 via PPAR-γ activation, impairing collagen production and worsening mucosal edema.
- Inhibition of ALOX15 in mouse models improved mucosal remodeling, reduced polyp size, and attenuated type 2 inflammation. Anti-IL-4Rα treatment in clinical trials reversed the metabolic axis and improved remodeling.
- The study highlights the type 2 inflammation-ALOX15-15(S)-HETE-PPAR-γ axis as a key driver of impaired tissue remodeling in ECRSwNP, offering new therapeutic targets for this refractory condition.