Illustration of Pla2g5 expression and function during allergen-induced
pulmonary inflammation.
Dendritic cells (DCs) expressing Pla2g5 uptake and process allergens for
presentation to T-cells in lymph nodes (LN). Activated T-cells are recruited to
the lung by Pla2g5-expressing macrophages producing CCL22.
Epithelial cells release IL-33, which activates ILC2s and macrophages.
Activated macrophages expressing Pla2g5 produce IL-33 and the FFAs, LA and OA,
which further activate ILC2s to produce IL-5 for eosinophil recruitment and
activation.