A macrocyclic sulfate (MCS)‐based approach to monodisperse poly(ethyleneglycols) (M‐PEGs) and their monofunctionalized derivatives has been developed. Macrocyclization of oligo(ethyleneglycols) (OEGs) provides MCS (up to a 62‐membered macrocycle) as versatile precursors for a range of monofunctionalized M‐PEGs. Through iterative nucleophilic ring‐opening reactions of MCS without performing group
knockdown assay demonstrated that the anti-GBM effect of 5 mainly depended on the expression of PKM2 in vitro and in vivo. Compound 16, a prodrug of 5, markedly suppressed U118 tumor xenograft growth and reduced the weight of tumor. On the basis of these investigations, we propose that 16 might be considered as a promising lead compound for discovery of anti-GBM drugs.
This article reports a cyclophosphazene-based hybrid polymer electrolyte formed via the epoxy–amine reaction for high-performance lithium-ion batteries.
本文报道了一种基于环磷酸酯的混合聚合物电解质,通过环氧-胺反应形成,用于高性能锂离子电池。
Self-assembled carbohydrate-based micelles for lectin targeting
作者:Alexandre G. Dal Bó、Valdir Soldi、Fernando C. Giacomelli、Bruno Jean、Isabelle Pignot-Paintrand、Redouane Borsali、Sébastien Fort
DOI:10.1039/c0sm01411g
日期:——
Biocompatible low-polydispersity micelles designed for lectin targeting have been prepared by spontaneous self-assembly in water of macromolecular glycosylated amphiphiles. Propargyl-β-lactoside and N-acetyl-β-D-glucosaminide were conjugated by copper-catalyzed Huisgen cycloaddition to azide-terminated PEG 900 stearate. Upon dissolution in water, the resulting amphiphiles immediately self-assemble into highly regular micelles having a mean diameter of 10 nm. Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM) and Small-Angle X-ray Scattering (SAXS) were used to investigate the structure of the self-assembled saccharidic amphiphiles micelles. The presence of the carbohydrate epitopes on the surface of the micelles and their bioavailability for lectin targeting were also demonstrated by light scattering measurements. Specific interaction of the GlcNac and Lac residues with Wheat Germ Agglutinin (WGA) and Peanut Agglutinin (PNA) respectively, unveils potential applications of such carbohydrate-derived surfactants as simple and site-specific vectorization systems for drug delivery.
Copolymers are prepared from (a) at least 0.5 mole % of monomers having reactive groups which are, directly or indirectly, capable of reaction with free amine or sulfhydryl groups of biologically active substances, (b) from 0.1 to 20 mole % of monomers having polyoxyalkylene side chains, each of which side chains has a molecular weight of at least 88, and (c) up to 99.4 mole % of oleophilic monomers which provide hydrophobicity to the copolymers. The copolymers can be supplied as latex particles in aqueous compositions.