Group 2 Innate Lymphoid Cells Program Pulmonary Adaptive Immunity via GM-CSF - PubMed
3 days ago
- #ILC2
- #immune memory
- #asthma
- Group 2 innate lymphoid cells (ILC2s) and CD4+ TH2 cells are central to type 2 immunity in the lungs and asthma pathology.
- ILC2s produce innate type 2 cytokines quickly in response to allergens, while TH2 cells provide adaptive, antigen-specific immune memory.
- The study investigated ILC2 roles in adaptive immunity using an asthma mouse model, finding ILC2s essential for dendritic cell (DC) responses.
- ILC2-deficient mice showed suppressed DC responses, failing to develop TH2-type tissue-resident memory CD4+ T cells and type 2 airway inflammation.
- Adoptive transfer of ILC2s restored these responses, highlighting the role of granulocyte-macrophage colony-stimulating factor (GM-CSF) produced by ILC2s.
- GM-CSF from ILC2s is crucial for DC activation, TH2 cell recruitment, and establishing lung antigen-specific T-cell immune memory.