Multimeric xanthates as carbonic anhydrase inhibitors
摘要:
The field of multivalent inhibition of enzymes is growing exponentially from the first reported multivalent effect on a glycosidase enzyme. However, the investigations have generally remained restricted to carbohydrate-processing enzymes. Carbonic anhydrases are ubiquitous metallo-enzymes involved in many key biological processes, that catalyze the reversible hydration/dehydration of CO2/HCO3-. This study reports the first synthesis of multimeric xanthates addressing the selectivity and potency of CA multivalent inhibition. Six multivalent compounds containing three, four, and six xanthate moieties were prepared and assayed against four relevant CA isoforms together with their monovalent analogues. Some of the multimers were stronger inhibitors than the monomeric species. For hCA I, the two best molecules 18 and 20 showed an improvement of the ligand affinity of 4.8 and 2.3 per xanthate units (valence-corrected values), respectively, which corresponds to a clear multivalent effect. Moreover, the biochemical assays demonstrated that the multimeric presentation of xanthates, also affected the selectivity of the relative inhibition among the four CAs assayed.
as ligands in copper-catalyzed azide and alkyne cycloaddition (CuAAC) reactions were studied. The compounds with a lower number of branches exhibit excellent gelation properties and can function as supramolecular gelators. The resulting gels were characterized using optical microcopy and atomic force microscopy. The glycoconjugates containing six branches showed significant catalytic activity for copper
[EN] SELECTIN OR GALECTIN ANTAGONISTS FOR TREATING CYTOKINE RELEASE SYNDROME AND CRS-INDUCED NEUROTOXICITY<br/>[FR] ANTAGONISTES DE LA SÉLECTINE OU DE LA GALECTINE POUR LE TRAITEMENT DU SYNDROME DE LIBÉRATION DE LA CYTOKINE ET DE LA NEUROTOXICITÉ INDUITE PAR LE CRS
申请人:MAGNANI JOHN L
公开号:WO2020150263A1
公开(公告)日:2020-07-23
Methods and compounds for the treatment and/or prevention of CRS and/or CRS-induced neurotoxicities using at least one selectin antagonist are disclosed. The disclosed methods and compounds use at least one of the disclosed antagonists to target and reduce cytokine expression and/or endothelial activation to treat and/or prevent CRS and/or CRS-related conditions such as CRS-induced neurotoxicities.
[EN] GALACTOSE-LINKED MULTIMERIC GLYCOMIMETIC INHIBITORS OF E-SELECTINS, GALECTIN-3, AND/OR CXCR4 CHEMOKINE RECEPTORS<br/>[FR] INHIBITEURS GLYCOMIMÉTIQUES MULTIMÈRES LIÉS AU GALACTOSE DE SÉLECTINES E, DE GALECTINE-3 ET/OU DE RÉCEPTEURS DE CHIMIOKINE CXCR4
申请人:GLYCOMIMETICS INC
公开号:WO2020219417A1
公开(公告)日:2020-10-29
Compounds, compositions, and methods for treating and/or preventing at least one disease, disorder, and/or condition associated with E-selectin, galectin-3, and/or CXCR4 chemokine receptor activity are disclosed herein. For example, multimeric glycomimetic inhibitors ofE-selectins, galectin-3, and/or CXCR4 chemokine receptors and their use for treating and/or preventing inflammatory diseases, fibrosis, and cancers are disclosed. Formula (I).
Cluster glycosides and heteroglycoclusters presented in alternative arrangements
作者:Andreza S. Figueredo、Luis O.B. Zamoner、Martin Rejzek、Robert A. Field、Ivone Carvalho
DOI:10.1016/j.tetlet.2018.10.069
日期:2018.12
Multivalent carbohydrates, or glycoclusters, are useful tools to study glycan-lectin and glycan-enzyme recognition processes and have wide potential therapeutic applicability. Herein, we report the synthesis of novel glycoclusters presenting glucopyranose units in alternate arrangements by coupling through the C-1, C-2, C-3 or C-6 sugar positions and using tetra- and hexa-valent scaffolds for multivalent
antibiotic therapies. Infections caused by Pseudomonasaeruginosa are of great concern, especially for immunocompromised and cystic fibrosis patients. P. aeruginosa lectins LecA and LecB are virulencefactors and play a key role in establishing biofilm; therefore, inhibition of the function of these proteins has potential in dismantling the bacterium from the protective biofilm environment and in restoring