Abstract:Objective To understand the growth characteristics of bovine cumulus cells and the transfection efficiency of cumulus cells,based on the gene vector pGC1-collagen-EGFP-Neor that containing human collagen type I cDNA gene and mammary gland specific promoter,constructed in our laboratory.Methods Bovine cumulus cells were obtained by digestion of bovine cumulus/oocyte complexes(COCs) using hyaluronidase.Gene vector pMSCV-EGFP-Neor and pGC1-collagen-EGFP-Neor was transfected into cumulus cells with cationic lip...