Aberrant expression of thioredoxin 1(Trx1)plays an important role in cancer initiation and progression and has gained attention as an anticancer drug *** we report that the recently discovered natural diterpenoid isof...
Aberrant expression of thioredoxin 1(Trx1)plays an important role in cancer initiation and progression and has gained attention as an anticancer drug *** we report that the recently discovered natural diterpenoid isoforretin A(IsoA)significantly inhibits Trx1 activity and mediates anticancer effects in multiple preclinical *** inhibitory effect of IsoA was antagonized by free radical scavengers polyethylene glycol-catalase,polyethylene glycol superoxide dismutase,thiol-based antioxidants N-acetylcysteine and *** spectrometry analysis revealed that the mechanism of action was based on direct conjugation of IsoA to the Cys32/Cys35 residues of *** conjugation event attenuated reversible thiol reduction of Trx1,leading to ROS accumulation and a broader degradation of thiol redox homeostasis in cancer *** these in vitro findings,we documented that IsoA administration inhibited the growth of HepG2 tumors in a murine xenograft model of hepatocellular *** together,our findings highlight IsoA as a potent bioactive inhibitor of Trxl and a candidate anticancer natural product.
ArcAB is a two-component regulatory system that can help bacterium respond to and survive in a changing *** identify the function of ArcAB homologs in Serratia marcescens FS14,in-frame deletion mutants of the arc A,ar...
详细信息
ArcAB is a two-component regulatory system that can help bacterium respond to and survive in a changing *** identify the function of ArcAB homologs in Serratia marcescens FS14,in-frame deletion mutants of the arc A,arcB and arcAB genes were *** our surprise,ArcB affects the motility of FS14,but ArcA does *** results are the opposite of those in Escherichia *** studies demonstrated that ArcB could promote bacterial motility by activating the synthesis of flagella and particularly by activating the expression of the biosurfactant serrawettin *** results suggest that ArcB regulates FS14 motility by interacting with an unknown response regulator other than *** regulation of ArcAB should be bacteria ***,there must be different response regulators crosstalking with ArcB to respond to the different stimuli in the complex regulation *** same regulatory system may develop different mechanisms to adapt to different environments.
暂无评论