Figure 1.

Effects of dietary tryptophan supplementation on intestinal permeability of piglets challenged with diquat. (A) D-lactate concentration; (B) diamine oxidase activity; (C) TER, transepithelial electrical resistance; (D) the flux of FD4, 4 kDa fluorescein isothiocyanate dextran, at the jejunum. Data are means ± standard error; n = 8 for each group. Mean values sharing different superscripts within the same row differ significantly (p < 0.05). Control, piglets fed the basal diet without diquat injection; diquat, piglets fed the basal diet and challenged with diquat; 0.15% Trp + diquat, piglets fed the 0.15% supplemented diet and treated with diquat.