Characterization of human hybrid cell line, F2N78, through a comparison of culture performances and protein qualities.

Abstract

To evaluate the characteristics of a novel human cell line, F2N78, including growth performance, physicochemical properties, and biological activity via direct comparison with CHO cells. The culture performance and physicochemical properties of antibodies produced from F2N78 and CHO cells were compared. For charge variants, antibodies produced from F2N78 cells contained a greater acidic charge variants than CHO cells. Regarding main glycoforms, degree of galactosylation was 52% in CT-A produced from F2N78 cells compared to CHO cells (37%). For sialic acid forms, α-2,6-linked sialic acid and N-acetylneuraminic acid (NANA) residues were observed in antibodies produced from F2N78 cells. In contrast, only α-2,3 linked sialic acid forms were detected in antibodies produced from CHO cells, and NANA and N-glycolylneuraminic acid were detected. Hybrid structure and bisecting structure were only observed in F2N78 cells. F2N78 cells stably produced antibodies with human specific N-glycan. The novel expression system based on human cells may facilitate the development of an alternative host cell for production of recombinant proteins.