The development of a novel transforming growth factor-β (TGF-β) inhibitor that disrupts ligand-receptor interactions
作者:Han Wu、Yu Sun、Wee Lin Wong、Jiajia Cui、Jingyang Li、Xuefu You、Lee Fah Yap、Yu Huang、Wei Hong、Xinyi Yang、Ian C. Paterson、Hao Wang
DOI:10.1016/j.ejmech.2020.112042
日期:2020.3
Transforming growth factor-beta (TGF-beta) plays an important role in regulating epithelial to mesenchymal transition (EMT) and the TGF-beta signaling pathway is a potential target for therapeutic intervention in the development of many diseases, such as fibrosis and cancer. Most currently available inhibitors of TGF-beta signaling function as TGF-beta receptor I (T beta R-I) kinase inhibitors, however, such kinase inhibitors often lack specificity. In the present study, we targeted the extracellular protein binding domain of the TGF-beta receptor II (T beta R-II) to interfere with the protein-protein interactions (PPIs) between TGF-beta and its receptors. One compound, CJJ300, inhibited TGF-beta signaling by disrupting the formation of the TGF-beta-T beta R-I-T beta R-II signaling complex. Treatment of A549 cells with CJJ300 resulted in the inhibition of downstream signaling events such as the phosphorylation of key factors along the TGF-beta pathway and the induction of EMT markers. Concomitant with these effects, CJJ300 significantly inhibited cell migration. The present study describes for the first time a designed molecule that can regulate TGF-beta-induced signaling and EMT by interfering with the PPIs required for the formation of the TGF-beta signaling complex. Therefore, CJJ300 can be an important lead compound with which to study TGF-beta signaling and to design more potent TGF-beta signaling antagonists. (C) 2020 Elsevier Masson SAS. All rights reserved.
Oxime-Based Receptors for Mono- and Disaccharides
作者:Monika Mazik、Arno C. Buthe
DOI:10.1021/jo701370g
日期:2007.10.1
Representatives of a new series of acyclic oxime-based receptors were prepared and their binding properties toward neutral sugar molecules studied. 1H NMR and fluorescence titrations revealed that receptors 2a and 2b, incorporating suitable positioned amine and oxime moieties, are able to form strong 1:1 complexes (Ka1 ∼ 105 M-1) with dodecyl α- and β-maltoside in chloroform solutions. Furthermore