Development of a bioassay system to screen anti-aging chemicals and characterization of candidate molecules

点击翻译按钮获取中文摘要

In this study, we tried to identify the intracellular signaling pathways and develop a system to screen anti-aging chemicals both in vitro and in vivo. We found that one of the synthesized sequences of identified motifs bound to hepatocyte nuclear factor-4 (HNF-4). When the reporter construct, containing an element upstream of a secreted alkaline phosphatase (SEAP) gene, was co-transfected with HNF-4 and its regulator peroxisome proliferator-activated receptor-gamma coactivator 1 (PGC-1), activity of SEAP was increased dose-dependently in comparison to untransfected controls. Moreover, transgenic mice established using this construct showed increased SEAP activity both calorie restriction (CR) and candidate chemical-fed mice in comparison to ad libitum fed mice. Interestingly, oxidative stress resistance was correlated with SEAP activity of these transgenic mice. These data suggest that our bioassay would be useful to screen for CR mimetic photochemical both in vitro and in vivo.