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. 2020 Dec 23;11:615536. doi: 10.3389/fimmu.2020.615536

Figure 4.

Figure 4

Butyrate increased bactericidal activity of macrophages through activation of HIF-1α. (A, B) HKMs were exposed to NaB (1 mM) as well as specific HIF-1α inhibitor, dimethyl-bisphenol A (DBA, 25 μM) (A, n = 7) or chrysin (25 μM) (B, n = 4) for 24 h, followed by the assessment of bacterial killing activity of treated macrophages. Error bars are presented as mean ± SD. (C, D) HKMs were treated with NaB (1 mM) plus DBA (C, n = 6) or chrysin (D, n = 3) for 24 h, and the gene expression of lysozyme was detected. (E, F) HKMs were incubated with NaB (1 mM) plus DBA (E, n = 7) or chrysin (F, n = 7) for 24 h, and lysozyme activity was assessed. Data were calculated from at least three independent experiments. * p < 0.05, ***p < 0.001.