Fig. 1From: Histamine H4 receptor regulates IL-6 and INF-γ secretion in native monocytes from healthy subjects and patients with allergic rhinitisIFN-γ and IL-6 secretion upon treatment with H1R or H4R antagonist. IFN-γ (a, b) and IL-6 (c, d) production was observed in U937 cells, which were challenged by histamine first and then treated by H1R (triprolidine) or H4R (JNJ7777120) antagonist under different dose and time points. Data are shown as the mean ± SEMBack to article page