Evaluation of the butyrylcholinesterase expression and activity in CHO, HEK-293 and vero cell lines transformed by dual promoter expression vector

BACKGROUND: Butyrylcholineesterase (BChE) is a therapeutic drug and its producing as a recombinant protein is an essential issue in biotechnology. One of the highlights in this regard is choosing the best host cells and plasmids. OBJECTIVES: The aim of this study is to evaluate the production of butyrylcholinesterase in Vero, HEK-293, and CHO cell lines using a dual promoter vector. MATERIAL AND METHODS: The dual-promoter construction (pBudCE dual BChE) was transfected into cell lines categorized in three experimental groups (pBudCE dual BChE, pCMV and negative control). BChE gene expression and enzyme activity was evaluated at different times. RESULTS: All three cell lines showed higher gene expression level in pBudCE dual BChE group. BChE enzyme activity level of this group in CHO cells decreased in sixth day and increased in ninth day. In HEK-293 cells it has a downward trend from sixth to ninth day and in Vero cells its level in the ninth day was the highest. CONCLUSION: The difference of pBudCE dual BChE and pCMV groups was more pronounced in the HEK-293 cell and the BChE gene expression level of this cells was higher than the others while, CHO cells showed higher level of BChE enzyme activity.