Structural optimization of a CXCR2-directed antagonist that indirectly inhibits γ-secretase and reduces Aβ
摘要:
Amyloid beta(A beta), a key molecule in the pathogenesis of Alzheimer's disease (AD), is derived from the amyloid precursor protein (APP) by sequential proteolysis via beta- and gamma-secretases. Because of their role in generation of A beta, these enzymes have emerged as important therapeutic targets for AD. In the case of gamma-secretase, progress has been made towards designing potent inhibitors with suitable pharmacological profiles. Direct gamma-secretase inhibitors are being evaluated in clinical trials and new strategies are being explored to block gamma-secretase activity indirectly as well. In this regard, we have previously reported an indirect regulation of gamma-secretase through antagonism of CXCR2, a G-protein coupled receptor (GPCR). We demonstrated that N-(2-hydroxy-4-nitrophenyl)-N'-(2-bromophenyl)urea (SB225002), a selective inhibitor of CXCR2 also plays a role in an indirect inhibition of gamma-secretase. Furthermore, we reported a similar to 5-fold difference in the selective inhibition of APP versus Notch processing via gamma-secretase following treatment with SB225002. Herein we describe the synthesis and optimization of SB225002. By determination of the structure-activity relationship (SAR), we derived small molecules that inhibit A beta 40 production with IC(50) values in the sub-micromolar range in a cell-based assay and also validated the potential of CXCR2 as a new target for therapeutic intervention in AD. (C) 2009 Elsevier Ltd. All rights reserved.
[EN] IL-8 RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RECEPTEURS D'IL-8
申请人:SMITHKLINE BEECHAM CORPORATION
公开号:WO1996025157A1
公开(公告)日:1996-08-22
(EN) This invention relates to the novel use of phenyl ureas in the treatment of disease states mediated by the chemokine, Interleukin-8 (IL-8).(FR) Cette invention se rapporte à une nouvelle utilisation des urées phényliques dans le traitement d'états pathologiques dont le médiateur est la chimiokine, appelée interleukine-8 (IL-8).
This invention relates to novel compounds and a novel use of phenyl ureas in the treatment of disease states mediated by the chemokine, Interleukin-8 (IL-8).
Evaluation of Potent and Selective Small-Molecule Antagonists for the CXCR2 Chemokine Receptor
作者:Katherine L. Widdowson、John D. Elliott、Daniel F. Veber、Hong Nie、Melvin C. Rutledge、Brent W. McCleland、Jia-Ning Xiang、Anthony J. Jurewicz、Robert P. Hertzberg、James J. Foley、Don E. Griswold、Lenox Martin、Judithann M. Lee、John R. White、Henry M. Sarau
DOI:10.1021/jm034248l
日期:2004.3.1
N,N'-Diarylureas were prepared, and the structure-activity relationship relative to the CXCR2 receptor was examined. This led to the identification of a potent and highly selective CXCR2 antagonist, which in addition was shown to be functionally active both in vitro against human neutrophils and in vivo in rabbit models of ear edema and neutropenia.