IL-6 is produced by Type 2 helper T cells (Th2 cells)18, but a previous study using a mouse model of atopic dermatitis confirmed that YRC3780 significantly reduced the concentration of IL-4 which is a marker of Th2 cells—in spleen cells, suggesting that it suppresses the activity of Th2 cells19. The gene discussed is IL6; the disease is atopic eczema.