Synthesis and biological evaluation of kresoxim-methyl analogues as novel inhibitors of hypoxia-inducible factor (HIF)-1 accumulation in cancer cells
摘要:
We designed and synthesized strobilurin analogues as hypoxia-inducible factor (HIF) inhibitors based on the molecular structure of kresoxim-methyl. Biological evaluation in human colorectal cancer HCT116 cells showed that most of the synthesized kresoxim-methyl analogues possessed moderate to potent inhibitory activity against hypoxia-induced HIF-1 transcriptional activation. Three candidates, compounds 11b, 11c, and 11d were identified as potent inhibitors against HIF-1 activation with IC50 values of 0.60-0.94 mu M. Under hypoxic condition, compounds 11b, 11c, and 11d increased the intracellular oxygen contents, thereby attenuating the hypoxia-induced accumulation of HIF-1 alpha protein. (C) 2017 Elsevier Ltd. All rights reserved.
Synthesis and Characterization of Amine-Functionalized Polystyrene Nanoparticles
摘要:
Functionalized polymer nanoparticles have been synthesized through an intramolecular cross-linking reaction with polystyrene as the backbone and an amino group as the functional moiety. The intramolecular cross-linking reaction was performed under ultradilute conditions, and the crosslinked polymers were characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), dynamic light scattering (DLS), and atomic force microscopy (AFM). The availability of the amino moiety in the nanoparticle for further functionalization was confirmed by its reaction with trimethylacetyl chloride.