Design and Evaluation of Nonpeptide Fibrinogen .gamma. Chain-Based GPIIB/IIIA Antagonists
摘要:
Two series of nonpeptide turn mimetics were designed by analysis of the solution NMR structure of the 385-411 sequence of the gamma-chain of fibrinogen. These compounds, based on the KQAGD (Lys-Gln-Ala-Gly-Asp, 406-410) sequence, were synthesized and studied in vitro. The most interesting compound from our study, RWJ 50042 (25), exhibits potent inhibition of fibrinogen binding to GPIIb/IIIa (IC50 = 0.009 mu M), as well as thrombin- or collagen-induced platelet aggregation (IC50 = 0.76, 0.14 mu M). Since the 400-411 sequence is required for gamma-chain bioactivity and is a unique recognition sequence among ligands for integrins, vis-a-vis other RGD (Arg-Gly-Asp)-presenting proteins, these turn mimetics may represent a new, selective approach to antagonism of the fibrinogen receptor.
[EN] ALPHA V BETA 6 AND ALPHA V BETA 1 INTEGRIN INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE L'INTÉGRINE ALPHA V BÊTA 6 ET ALPHA V BÊTA 1 ET LEURS UTILISATIONS
申请人:DICE MOLECULES SV INC
公开号:WO2022192545A1
公开(公告)日:2022-09-15
Provided herein are alpha V beta 6 and alpha V beta 1 integrin inhibitors, methods of making such alpha V beta 6 and alpha V beta 1 integrin inhibitors, pharmaceutical compositions of alpha V beta 6 and alpha V beta 1 integrin inhibitors, and methods of treating and/or preventing various medical disorders in a subject by administering to the subject in need thereof alpha V beta 6 and alpha V beta 1 integrin inhibitors.
Following the withdrawal of novobiocin, the introduction of a new ATPase inhibitor of DNA gyrase to the clinic would add the first representative of this mechanistic class to the antibacterial pipeline. This would be of great importance because of the well-known problems associated with antibacterial resistance. Using structure-based design and starting from the recently determined crystal structure of the N-phenyl-4,5-dibromopyrrolamide inhibitor-DNA gyrase B complex, we have prepared 28 new N-phenyl-4,5-dibromopyrrolamides and N-phenylindolamides and evaluated them against DNA gyrase from Escherichia coli. The most potent compound was 2-((4-(4,5-dibromo-1H-pyrrole-2-carboxamido)phenyl) amino)-2-oxoacetic acid (9a), with an IC50 of 0.18 mu M against E. coli gyrase. A selected set of compounds was evaluated against DNA gyrase from Staphylococcus aureus and against topoisomerase IV from E. coli and S. aureus, but the activities were weaker. The binding affinity of 2-((4-(4,5-dibromo-1H-pyrrole-2carboxamido)phenyl)amino)-2-oxoacetic acid (9a) to E. coli gyrase was studied using surface plasmon resonance. In the design of the present series, the focus was on the optimisation of biological activities of compounds especially by varying their size, the position and orientation of key functional groups, and their acid base properties. The structure activity relationship (SAR) was examined and the results were rationalised with molecular docking. (C) 2016 Elsevier Masson SAS. All rights reserved.
Discovery of molecular switches within the ADX-47273 mGlu5 PAM scaffold that modulate modes of pharmacology to afford potent mGlu5 NAMs, PAMs and partial antagonists
作者:Jeffrey P. Lamb、Darren W. Engers、Colleen M. Niswender、Alice L. Rodriguez、Daryl F. Venable、P. Jeffrey Conn、Craig W. Lindsley
DOI:10.1016/j.bmcl.2010.11.119
日期:2011.5
This Letter describes a chemical lead optimization campaign directed at a weak mGlu(5) NAM discovered while developing SAR for the mGlu(5) PAM, ADX-47273. An iterative parallel synthesis effort discovered multiple, subtle molecular switches that afford potent mGlu(5) NAMs, mGlu(5) PAMs as well as mGlu(5) partial antagonists. (C) 2010 Elsevier Ltd. All rights reserved.