Stimulation. All of these findings indicate that transgenic animals can respond rapidly to bacterial infection and that they do so by releasing more cytokines than non-transgenic animals. Monocytes/macrophages were challenged with LPS, and levels of TNF-a, IL-10, IL-6, IL-8, and IFN-c transcription were measured (Fig. 8). In the transgenic group, under 100 ng/mL LPS stimulation, IL-6 expression remained relatively high throughout the study. This differed significantly from the non-transgenic group at 2 hours post-stimulation. At no point in the study did the transgenic and non-transgenic groups differ with respect to expression of IL-8 and TNF-a. Expression of IL-6 and IL-8 remained high, indicating 
that the inflammation reaction wasongoing. Under 1000 ng/mL LPS stimulation, IL-6 expression was up-regulated, and it peaked 12 hours after stimulation, followed by a decline. The expression of IL-8 continued to increase in 1326631 both transgenic and non-transgenic animals. The highest levels of TNF-a and IFN-c expression were observed 2 hours and 1 hour after stimulation, respectively, after which the expression of both declined immediately. The transient expression of TNF-a and IFN-c helped to prevent over-inflammatory reaction. IL-10 expression was shown to increase significantly by 0.5 hours after LY-2409021 web stimulation in transgenic cells and tended 
to be upregulated during the experiment. This indicates that antiinflammatory factors were released.Overexpression of TLR4 induced strong oxidative injury by secret NO of monocyte/macrophage in transgenic sheepNO plays an important role in killing the invaded microbes in a non-specific manner. Levels of NO, T-NOS, and active iNOS are shown in Figure 9. For transgenic sheep, similar patterns were observed ?a dramatic rise and a rapid decline. Expression of iNOS was up-regulated at 0.5 hours post-stimulation and a 2-fold increase was observed over the non-transgenic group by 4 hours 1326631 both transgenic and non-transgenic animals. The highest levels of TNF-a and IFN-c expression were observed 2 hours and 1 hour after stimulation, respectively, after which the expression of both declined immediately. The transient expression of TNF-a and IFN-c helped to prevent over-inflammatory reaction. IL-10 expression was shown to increase significantly by 0.5 hours after stimulation in transgenic cells and tended to be upregulated during the experiment. This indicates that antiinflammatory factors were released.Overexpression of TLR4 induced strong oxidative injury by secret NO of monocyte/macrophage in transgenic sheepNO plays an important role in killing the invaded microbes in a non-specific manner. Levels of NO, T-NOS, and active iNOS are shown in Figure 9. For transgenic sheep, similar patterns were observed ?a dramatic rise and a rapid decline. Expression of iNOS was up-regulated at 0.5 hours post-stimulation and a 2-fold increase was observed over the non-transgenic group by 4 hours 15755315 post-stimulation (P,0.05). The pattern of NO secretion was similar to that of IL-6 and IL-8.Rapid neutrophil infiltration in the ear of transgenic sheep after stimulation with LPSSheep ear tissue was exposed to 3 mg/mL LPS by intradermic injection. To assess HE staining, ear tissue sections were collected at different times from both transgenic and non-transgenic lambsOverexpression of Toll-Like Receptor 4 in SheepFigure 2. Effects of overexpression of TLR4 in fetal fibroblasts in vitro on the inflammatory reaction. A) Transient transfection of pTLR43S vector in the fetal fibroblast cell (1006). B) Show TLR4 overexpressed in fetal fibroblasts by transient transfection. C) and D) TNF-a transcriptional level under LPS (1 ng/mL, 10 ng/mL) stimulation. In the overexpression group, the subjects’ immune systems quickly responded to stimulation. In graph: C = subjects transfected with p3S-LoxP fetal fibroblasts, subjects transfected with TLR4 = pTLR4-3S fetal fibroblasts. Data shown are means 6 SE. * Values within the same concentration of LPS with differ significantly across different groups (P,0.05). doi:10.1371/journal.pone.0047118.g(Fig. 10). In the transgenic group, inflammatory cell infiltration was observed around blood vessel dermis by 0.5 hours post injection. The horny layer was sloughed off and cell infiltration was observed by 4 hours post injection. By 24 hours post injection, no abnormalities were observed. In the non-transgenic group, only few eosinophil infiltrations were observed by 0.5 hours post injection. Cell componen.