Construction and expression characterization of transgenic chicken bioreactor vector
转基因鸡生物反应器载体的构建及其表达特性分析

We constructed transgenic chicken bioreactor vector, driven by chicken ovalbumin promoter, lentiviral vector and cytomegalovirus (CMV) promoter control vector encoding green fluorescent protein (GFP) and luciferase (Luc) as reporter genes. The three vectors were used to transfect or infect chicken primary oviduct epithelial cells, embryo fibroblasts cells, mouse 3T3-L1 preadipocytes cells and bovine mammary epithelial cells. High efficient and specific expression vector for transgenic chicken bioreactor was determined by detecting fluorescence and luciferase activity. Reporter gene analysis showed that chicken ovalbumin promoter expression vector was not cell type-specific in these four different cells. Additionally, luciferase reporter analysis illustrated that the chicken ovalbumin promoter activity was over 100 times lower than that of the CMV promoter in four different cells. Both of these two reporter genes were expressed in those four different cells infected by lentiviral expression vectors. Similarly, the GFP reached the similar expression level in cells infected by lentivirus and cells transfected with CMV promoter plasmid vectors when the multiplicity of infection was 20. In conclusion, the transgenic chicken bioreactor vector under the control of chicken ovalbumin promoter was not highly efficient and cell type-specific. However, the efficient expression and extensiveness of lentiviral vector could be used for studying chicken oviduct bioreactor.