Synthesis of new ligands for targeting the S1P1 receptor
摘要:
Sphingosine-1-phosphate (S1P) influences various fundamental biological processes by interacting with a family of five G protein-coupled receptors (S1P(1-5)). FTY720, a sphingosine analogue, which was approved for treatment of relapsing forms of multiple sclerosis, is phosphorylated in vivo and acts as an agonist of four of the five S1P receptor subtypes. Starting from these lead structures we developed new agonists for the S1P(1) receptor. The biological activity was tested in vivo and promising ligands were fluorinated at different positions to identify candidates for positron emission tomography (PET) imaging after [F-18]-labelling. The radioligands shall enable the imaging of S1P(1) receptor expression in vivo and thus may serve as novel imaging markers of S1P-related diseases. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of new ligands for targeting the S1P1 receptor
摘要:
Sphingosine-1-phosphate (S1P) influences various fundamental biological processes by interacting with a family of five G protein-coupled receptors (S1P(1-5)). FTY720, a sphingosine analogue, which was approved for treatment of relapsing forms of multiple sclerosis, is phosphorylated in vivo and acts as an agonist of four of the five S1P receptor subtypes. Starting from these lead structures we developed new agonists for the S1P(1) receptor. The biological activity was tested in vivo and promising ligands were fluorinated at different positions to identify candidates for positron emission tomography (PET) imaging after [F-18]-labelling. The radioligands shall enable the imaging of S1P(1) receptor expression in vivo and thus may serve as novel imaging markers of S1P-related diseases. (C) 2015 Elsevier Ltd. All rights reserved.
The overstimulation of the N-methyl-D-aspartate (NMDA) subtype of glutamate receptors is involved in excitotoxicity, a process participating in neurodegeneration that characterizes some neurological disorders and acute cerebral insults. In looking for compounds with neuroprotective properties, a series of kynurenine derivatives were synthesized, and their effects on both the NMDA and nNOS activity in rat striatum were evaluated. Two compounds, 15a (2-acetamido-4-(2-amino-5-methoxyphenyl)-4-oxobutyric acid) and 15c (2-butyramido-4-(2-amino-5-methoxyphenyl)-4-oxobutyric acid), displayed more potent activities than the other synthetic compounds tested for the inhibition of NMDA excitability and nNOS activity. Two other compounds, 18a (2-acetamido-4-(3-methoxyphenyl)-4-oxobutyric acid) and 18c (2-butyramido-4-(3-methoxyphenyl)-4-oxobutyric acid), that have the same structure as 15a and 15c, except the amino group in R-1, showed different effects. Whereas compound 18a showed lower electrophysiological potency than compounds 15a and 15c in the inhibition of the NMDA-dependent excitability, compound 18c showed the opposite effect. Moreover, compounds 18a and 18c were unable to modify nNOS activity. The remaining kynurenines tested behave like compound 18a. These results suggest that a structure-related activity of these synthetic kynurenines and a N-H bond in a specific direction is necessary for some kynurenine analogues to inhibit nNOS activity.
4-Hydroxy-2-quinolones. 31. 3-Amino-ir-2-oxo-4-hydroxyquinolines and their acyl derivatives
作者:I. V. Ukrainets、S. G. Taran、L. V. Sidorenko、O. V. Gorokhova、A. A. Ogirenko、A. V. Turov、N. I. Filimonova
DOI:10.1007/bf01176974
日期:1996.8
Ginzburg,O.F.; Ryaboi,V.I., Journal of general chemistry of the USSR, 1964, vol. 34, p. 1175 - 1176
作者:Ginzburg,O.F.、Ryaboi,V.I.
DOI:——
日期:——
4-HETEROARYL PIPERIDINE INTERMEDIATES AND THEIR PREPARATION
申请人:NOVO NORDISK A/S
公开号:EP0502024B1
公开(公告)日:1996-07-10
ARCT, B.;KOSSOWSKA, B.;LORENZ, M.;PRELICZ, D.;SEDZIK-HIBNER, D.;OSTROWSKI+, J. ENVIRON. SCI. AND HEALTH, 1983, 18, N 4-5, 559-568