Cyclo-His-Pro (CHP) is a cyclic dipeptide with numerous biological activities, and structurally related to thyrotropin-releasing hormone that was originally discovered in brain. This study was designed to determine the protective effect and its action mechanism of CHP on the apoptosis of pancreatic β-cells. The RINm5F cell line is a well-established and commonly used in vitro model for the study of the biology of pancreatic islet cells. Hence, the effect of CHP was tested on streptozotocin (STZ)-treated RINm5F cells and their stimulatory effects on RINm5F cells proliferation and apoptosis were investigated. CHP was produced from defatted soybean meal by hydrolysis with commercial proteases. In RINm5F cells, CHP markedly protected against STZ-mediated cytotoxicity (76%). Moreover, RINm5F cells incubated with CHP showed a significant reductions of STZ-induced nitric oxide (NO) production and lipidperoxidation. It also reduced the STZ-induced apoptotic events such as the activation of caspase-3, poly (ADP-ribose) polymerase cleavage, and DNA fragmentation in RINm5F cells showing the mode of protection of CHP on RINm5F cells. In addition, RINm5F cells treated with CHP increased the insulin-secretion capacity. These results suggest that CHP may be a candidate for the therapeutic agent against STZ-mediated cytotoxicity and apoptosis.
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