Effect of mitochondrial and ER-targeted B cl-2 overexpression on apoptosis in recombinant Chinese hamster ovary cells under sodium butyrate-treated condition
Maintenance of mitochondria integrity by overexpression of Bcl-2, a typical anti-apoptotic protein, is a critical point in recombinant Chinese hamster ovary (rCHO) cell culture treated with sodium butyrate (NaBu) known as a typical specific productivity-enhancing factor. Bcl-2 distributes and functions in multiple intracellular organelles such as nucleus, mitochondria, and ER. To evaluate the effect of organelle -specific overexpression of Bcl-2 on NaBu-induced apoptosis, Bcl-2 expression was restricted at mitochondria or ER by employing mitochondrial insertion sequence of ActA or ER-specific sequence of cytochrome b5 to its sequence. The rCHO cell lines over -expressing mitochondrial Bcl-2 (MT-Bcl-2) or ER-targeted Bcl-2 (ER-Bcl-2) were established. Overexpression of MT-Bcl-2 or ER-Bcl-2 could increase cell viability and decrease LDH release under NaBu-treated condition. Also, it could suppress NaBu-induced apoptosis as evidenced from DNA fragmentation assay. Mitochondria membrane potential assay revealed that ER-Bcl-2 overexpression can maintain the mitochondria membrane integrity without helping MT-Bcl-2 overexpression, indicating the role of ER should be considered in alleviating NaBu-induced apoptosis by genetic modulation strategy. Taken together, it was found that restricted Bcl-2 overexpression at ER could inhibit the NaBu-induced apoptosis via maintaining mitochondria integrity in rCHO cells.
Yeon-Gu KIM [ Biotechnology Process Engineering Center, KRIBB, Daejon 305-806, Korea. ]
Byoungwoo PARK [ Biotechnology Process Engineering Center, KRIBB, Daejon 305-806, Korea. ]
Jee Yon KIM [ Department of Biological Sciences, Graduate School of Nanoscience & Technology (WCU), KAIST, 373-1 Kusong-Dong, Yusong-Gu, Daejon 305-701, Korea. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동
간행물
간행물명
한국생물공학회 학술대회
간기
반년간
수록기간
1985~2013
십진분류
KDC 476DDC 576
이 권호 내 다른 논문 / 한국생물공학회 학술대회 2011년도 한국생물공학회 춘계학술발표대회