Fig. 7
Effects of PCA and Que on proinflammatory cytokine secretion after infection with ETEC K88 in IPEC-1 cells. Cells were cultured with 40 μmol/L PCA or 10 μmol/L Que for 24 h, followed by infected with or without 1 × 108 ETEC K88/mL for another 2 h. a–c mRNA expressions of TNF-α, IL-8 and IL-6. d–f Protein concentration of TNF-α, IL-8 and IL-6. Values are means ± SE, n = 6. a–eDifferent letters represent a significant difference, P < 0.05. IL-6, interleukin-6; IL-8, interleukin-8; TNF-α, tumor necrosis factor-α