Effect of Anti-apoptotic Agents in Recombinant Chinese Hamster Ovary Cell Expressing Iduronate 2-sulphatase

The suppression of apoptosis during the cell culture might increase recombinant protein production. In the present study, the effects of anti-apoptotic agents on the apoptosis of recombinant Chinese Hamster Ovary cells and the production of Iduronate 2-sulphatase(IDS) were investigated Cell density slightly increased when $2{\mu}M$ of EGCG and $10{\mu}g/mL$ of STR-G were added to culture medium after two days. It was observed that the percentage of apoptotic cells was decreased in the culture with STR-G, and Bcl-2 expression level was enhanced in both culture with STR-G and EGCG. These results suggest that G418 and EGCG are effective anti-apoptotic agents for increasing the productivity of IDS with recombinant CHO-DG44.

본 연구에서는 세포 사멸을 억제시켜 재조합 단백질의 생산을 향상시키기 위한 전략을 개발하기 위해, 우선 STR-G와 EGCG를 농도별로 첨가하여 세포 성장, 사멸 그리고 IDS 생산성에 미치는 영향을 조사하였다. Flow cytometry 분석 결과, STR-G에 의한 apoptotic cell percentage의 감소, STR-G와 EGCG에 의한 bel-2 expression level의 증가와 IDS 생산성의 증가를 확인하였다.