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Updated: Jun 15, 2026
High Yield Expression of Recombinant Human Proteins with the Transient Transfection of HEK293 Cells in Suspension
Published on: December 28, 2015
Transient expression of recombinant sPDGFR alpha-Fc in CHO DG44 cells using 50-mL orbitally shaking disposable
Yun-Xia Sang1, Xiao-Wei Zhang, Xiao-Jia Chen
1Biomedical R&D Center, Guangdong Provincial Key Laboratory of Bioengineering Medicine, National Engineering Research Center of Genetic Medicine, Jinan University, Guangzhou 510632, Guangdong, PR China.
Abstract:
Overactivity of platelet-derived growth factor (PDGF) has been linked to malignant cancers. High levels of PDGF result in the activation of its receptors (PDGFRs) and the over-proliferation of cells. Therefore, interfering with this signaling pathway in cancer cells could be significant for anti-cancer drug development. In a previous study, the sPDGFR alpha-Fc fusion protein expressed in static CHO-k(1) cells showed an anti-proliferative effect on vascular endothelial cells. However, it was difficult to obtain a large quantity of this fusion protein for further functional studies. In the present study, the sPDGFR alpha-Fc fusion protein was transiently expressed in Chinese Hamster Ovary (CHO) DG44 cells in 50-mL orbital shaking bioreactors. sPDGFR alpha-Fc was expressed as a 250-kDa dimeric protein with potential glycosylation. The final yield of sPDGFR alpha-Fc in the culture supernatant was as high as 16.68 mg/L. Our results suggest that transient expression in orbital shaking bioreactors may be feasible for preparation of recombinant proteins used for preclinical studies.
