A Fragment-Based In Situ Combinatorial Approach To Identify High-Affinity Ligands for Unknown Binding Sites
作者:Sachin V. Shelke、Brian Cutting、Xiaohua Jiang、Hendrik Koliwer-Brandl、Daniel S. Strasser、Oliver Schwardt、Soerge Kelm、Beat Ernst
DOI:10.1002/anie.200907254
日期:——
the lead: The title method for the identification of ligands is particularly useful for bindingsites where little or no structural information is available. In a fragment‐based approach, a suitable pair of first‐ and second‐siteligands is identified by NMR experiments. By applying a receptor‐mediated in situcombinatorialapproach, the two ligands are then linked to generate a new high‐affinity lead
Nanomolar E-Selectin Antagonists with Prolonged Half-Lives by a Fragment-Based Approach
作者:Jonas Egger、Céline Weckerle、Brian Cutting、Oliver Schwardt、Said Rabbani、Katrin Lemme、Beat Ernst
DOI:10.1021/ja4029582
日期:2013.7.3
Selectins, a family of C-type lectins, play a key role in inflammatory diseases (e.g., asthma and arthritis). However, the only millimolar affinity of sialyl Lewis(x) (sLe(x)), which is the common tetrasaccharide epitope of all physiological selectin ligands, has been a major obstacle to the development of selectin antagonists for therapeutic applications. In a fragment-based approach guided by NMR, ligands binding to a second site in close proximity to a sLe(x) mimic were identified. A library of antagonists obtained by connecting the sLe(x) mimic to the best second-site ligand via triazole linkers of different lengths was evaluated by surface plasmon resonance. Detailed analysis of the five most promising candidates revealed antagonists with K-D values ranging from 30 to 89 nM. In contrast to carbohydratelectin complexes with typical half-lives (t(1/2)) in the range of one second or even less, these fragment-based selectin antagonists show t(1/2) of several minutes. They exhibit a promising starting point for the development of novel anti-inflammatory drugs.
METHOD FOR THE IDENTIFICATION OF NEW LEADS FOR DRUG CANDIDATES
申请人:Universität Basel
公开号:EP2013624B1
公开(公告)日:2011-08-03
Method for the Identification of New Leads for Drug Candidates
申请人:Ernst Beat
公开号:US20090239760A1
公开(公告)日:2009-09-24
Disclosed is a method for producing new leads for drug candidates. The method employs a combinatorial approach for identifying high affinity ligands. The target may be unknown and/or may include one or more unknown binding sites. A method involving a combined screening and synthesis method for bi-site inhibitors is disclosed comprising: 1) determining if there is sufficient proximity between ligands binding to different sites of a target: e.g. by using spin-labelled ligands quenching can be measured with NMR if a first ligand and second allosteric ligand are in proximity 2) connecting both ligands having linkers, via in situ synthesis in the presence of the protein scaffold (e.g. target guided synthesis combined with fragment based self assembly). Click chemistry is a preferred embodiment here. Also disclosed are kits used in context of this method, leads discovered by the method and their use in drug development. Leads for drugs acting on myelin associated glycoprotein (MAG) have been identified and synthesised.
[EN] METHOD FOR THE IDENTIFICATION OF NEW LEADS FOR DRUG CANDIDATES<br/>[FR] PROCÉDÉ D'IDENTIFICATION DE NOUVELLES TÊTES DE SÉRIE POUR DES MÉDICAMENTS CANDIDATS
申请人:UNIV BASEL
公开号:WO2007105094A1
公开(公告)日:2007-09-20
[EN] Disclosed is a method for producing new leads for drug candidates. The method employs a combinatorial approach for identifying high affinity ligands. The target may be unknown and/or may include one or more unknown binding sites. A method involving a combined screening and synthesis method for bi-site inhibitors is disclosed comprising: 1) determining if there is sufficient proximity between ligands binding to different sites of a target: e.g. by using spin-labelled ligands quenching can be measured with NMR if a first ligand and second allosteric ligand are in proximity 2) connecting both ligands having linkers, via in situ synthesis in the presence of the protein scaffold (e.g. target guided synthesis combined with fragment based self assembly). Click chemistry is a preferred embodiment here. Also disclosed are kits used in context of this method, leads discovered by the method and their use in drug development. Leads for drugs acting on myelin associated glycoprotein (MAG) have been identified and synthesised. [FR] La présente invention concerne un procédé de production de nouvelles têtes de série pour des médicaments candidats. Le procédé utilise une approche combinatoire pour identifier des ligands à affinité élevée. La cible peut être inconnue et/ou peut comprendre un ou des sites de liaison inconnus. L'invention concerne également un procédé comprenant un procédé combiné de criblage et de synthèse pour des inhibiteurs à deux sites comprenant: 1) la détermination de proximité suffisante entre des ligands de liaison à différents sites d'une cible, par exemple, au moyen de ligands marqués par spin, la désactivation peut être mesurée par la résonance magnétique nucléaire si un premier ligand et un second ligand allostérique sont en relation de proximité, 2) la connexion de deux ligands ayant des lieurs, par une synthèse in situ en présence de l'échafaudage protéinique interne (par exemple, une synthèse orientée vers la cible avec un auto-assemblage à base de fragments). La technique de liaison covalente désignée "click chemistry" constitue un mode de réalisation préféré de la présente invention. L'invention concerne également des trousses utilisées dans le cadre de ce procédé, des têtes de série découvertes par ce procédé et leur utilisation dans le développement de médicaments. Des têtes de série pour des médicaments agissant sur la glycoprotéine associée à la myéline (MAG) ont été identifiées et synthétisées.