The Expression of NF-kB Signaling Pathway Was Inhibited by Silencing TGF-b4 in Chicken IECs Infected with E. tenella

Jin, HHaicheng, YCaiyun, ZYong, ZJinrong, W

Chicken coccidiosis is a parasitic disease caused by one or more species of Eimeria infection with severe consequences. The NF-B signaling pathway and TGF-4 play an important role in the inflammation and immune response caused by coccidiosis infection. This study was designed to investigate the changes of NF-B signaling pathway and the effects of TGF-4 silencing on the expression of NF-B signaling pathway in chickens intestinal epithelial cells (IECs) after infecting with E. tenella sporozoites. TGF-4 small interfering RNA (TGF-4 siRNA) sequences were transfected into chicken IECs for reducing TGF-4 expression. The results showed that compared with uninfected control group (Con.), the proinflammatory factors of NF-B, IL-6, IL-2, IL-1 increased significantly in the E. tenella infected group (ET) (p 0.05). In comparison with the IECs in the ET, the expression level of NF-B, IL-6, IL-2, IL-1 dropped significantly in the group infected both by E. tenella and TGF-4 siRNA vector (ET+siRNA) (p 0.05). The results of this experiment indicate that NF-B signaling pathway is closely correlated with TGF-4 in IECs infected with coccidia sporozoites. TGF-4 plays an important role in regulating the immune function of coccidia-infected chicken epithelial cells through NF-B signaling pathway and preventing immune-mediated pathological changes.(AU)

1. NF-B signaling pathway
2. Chicken
3. TGF-4
4. Coccidiosis
5. IECs