The development of a new class of inhibitors for betaine-homocysteine S-methyltransferase
摘要:
Betaine-homocysteine S-methyltransferase (BHMT) is an important zinc-dependent methyltransferase that uses betaine as the methyl donor for the remethylation of homocysteine to form methionine. In the liver, BHMT performs to half of the homocysteine remethylation. In this study, we systematically investigated the tolerance of the enzyme for modifications at the "homocysteine" part of the previously reported potent inhibitor (R,S)-5-(3-amino-3-carboxy-propylsulfanyl)-pentanoic acid (1). In the new compounds, which are S-alkylated homocysteine derivatives, we replaced the carboxylic group in the "homocysteine" part of inhibitor 1 with different isosteric moieties (tetrazole and oxadiazolone); we suppressed the carboxylic negative charge by amidations; we enhanced acidity by replacing the carboxylate with phosphonic or phosphinic acids; and we introduced pyrrolidine steric constraints. Some of these compounds display high affinity toward human BHMT and may be useful for further pharmacological studies of this enzyme. Although none of the new compounds were more potent inhibitors than the reference inhibitor 1, this study helped to completely define the structural requirements of the active site of BHMT and revealed the remarkable selectivity of the enzyme for homocysteine. (C) 2013 Elsevier Masson SAS. All rights reserved.
[EN] AMINOPEPTIDASE A INHIBITORS AND PHARMACEUTICAL COMPOSITIONS COMPRISING THE SAME<br/>[FR] INHIBITEURS D'AMINOPEPTIDASE A ET COMPOSITIONS PHARMACEUTIQUES LES COMPRENANT
申请人:QUANTUM GENOMICS
公开号:WO2020084131A1
公开(公告)日:2020-04-30
The present invention relates to a novel compound, to a composition comprising the same, to methods for preparing the compound, and the use of this compound in therapy. In particular, the present invention relates to compound that is useful in the treatment and prevention of primary and secondary arterial hypertension, ictus, myocardial ischaemia, cardiac and renal insufficiency, myocardial infarction, peripheral vascular disease, diabetic proteinuria, Syndrome X and glaucoma.
[EN] BIOLUMINESCENT COMPOSITIONS AND USES THEREOF<br/>[FR] COMPOSITIONS BIOLUMINESCENTES ET LEURS UTILISATIONS
申请人:ECOLE POLYTECHNIQUE FED DE LAUSANNE EPFL EPFL DAR TTO
公开号:WO2021152393A1
公开(公告)日:2021-08-05
Compositions and methods for non-invasively monitoring the intracellular processing of a biomolecule are provided. The compositions have a novel thio-luciferin moiety which can be conjugated to the biomolecule directly or via a linker such as disulfide bond wherein the luminescent (such as thio-luciferin) or pro-luminescent (such as thio-cyanobenzothiazoles) moiety is released upon reduction of the disulfide bond upon cytosolic internalization.
[EN] COMPOUNDS AND METHODS FOR TRANS-MEMBRANE DELIVERY OF MOLECULES<br/>[FR] COMPOSÉS ET PROCÉDÉS POUR L'ADMINISTRATION TRANSMEMBRANAIRE DE MOLÉCULES
申请人:APOSENSE LTD
公开号:WO2019130319A1
公开(公告)日:2019-07-04
The Invention provides a novel delivery system for delivery of drugs across biological membranes. It provides novel chemical conjugates that comprise said delivery system, methods for synthesis of said compounds, and methods for utilization of said delivery system, among others, for delivery of genetic drugs into tissues and cells, in vitro, ex vivo, and in vivo, for the treatment of various medical disorders.
Enzymatic and Organocatalyzed Asymmetric Aldolization Reactions for the Synthesis of Thiosugar Scaffolds
作者:Johan Fanton、Flora Camps、José A. Castillo、Christine Guérard-Hélaine、Marielle Lemaire、Franck Charmantray、Laurence Hecquet
DOI:10.1002/ejoc.201101137
日期:2012.1
We studied the synthesis of original thiosugar scaffolds by enantioselective aldolization. L-Proline-catalyzed C-C bond formation was the key step in the synthesis of L-erythro-thioketoses (3S,4R), whereas fructose-6-phosphate aldolase-catalyzed reactions yielded the D-threo-thioketose series (3S,4S). By the organocatalytic approach, 5-thio-L-ribulofuranose (1) and 5-deoxy-6-thio-L-psicopyranose (2)
Phase-Transfer Catalyzed Asymmetric [4 + 1] Annulations for the Synthesis of Chiral 2,2-Disubstituted Tetrahydrothiophenes
作者:Qi Yin、Xiaolu Wen、Yiwei Chen、Xiangnan Gong、Lin Hu
DOI:10.1021/acs.orglett.1c02744
日期:2021.10.1
An efficient catalyticasymmetric [4 + 1] reaction, which features the use of simple β-keto esters as one-carbon nucleophiles and 5-succinimidothio-pent-2-enoates as four-atom bielectrophiles, has been developed in the presence of a bifunctional chiral phase-transfer catalyst. The new annulation provides a distinct protocol to access the functionalized 2-acyl-2-carboxyl tetrahydrothiophenes bearing