Pathophysiologic mechanisms of chronic rhinosinusitis and their roles in emerging disease endotypes

Chronic rhinosinusitis (CRS) is a heterogeneous disorder with distinct pathophysiologic mechanisms. Based on the transcription factor expression and cytokine production patterns in different types of innate lymphoid cells (ILCs), in parallel with those of adaptive CD4+ T helper (Th) cells and CD8+ cytotoxic T (Tc) cells, new perspectives on endotypes of patients are emerging around the immune response deviation into type 1 (orchestrated by ILC1s, Tc1 and Th1 cells), type 2 (characterized by ILC2s, Tc2 and Th2 cells), and type 3 (mediated by ILC3s, Tc17 and Th17 cells) responses. (Source: Annals of Allergy, Asthma and Immunology)

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