Aim: To express the recombinant angiogenin protein in mammalian cells.
Methods: Human ANG full-length cDNA was obtained by chemical synthesis. The target gene ANG was inserted into eukaryotic expression vector pEGFP-C2. The recombinant plasmid was transfected into the human umbilical vein endothelial cells (HUVECs) via Lipofectin transfection. The expression of ANG gene in transfected HUVECs was detected by fluorescence microscopy and immunohistochemical staining.
Results: DNA sequencing showed the sequence of the synthetic ANG was correct and amino acid sequence of ANG was right. The green fluorescence could be seen in transfected HUVECs under fluorescence microscope. Immunohistochemical staining detection showed that ANG expressed in transfected cells.
Conclusion: Human ANG full-length cDNA has been obtained. The ANG protein was expressed in mammalian cells successfully.