Cytosol-Specific Fluorogenic Reactions for Visualizing Intracellular Disintegration of Responsive Polymeric Nanocarriers and Triggered Drug Release
摘要:
Supramolecular aggregates of stimuli-responsive block copolymers are increasingly utilized as drug nanocarriers. Although in situ tracking their triggered disintegration and drug release processes at the cellular level is highly desirable, it remains a considerable challenge. We report the fabrication of double hydrophilic block copolymers covalently conjugated with alpha,beta-unsaturated ketone-caged coumarin functionalities in the thermoresponsive block. Upon thermo-induced micellization and cellular uptake, Michael addition reaction of unsaturated ketone moieties with thiol compounds (GSH and Cys) in the reductive subcellular compartments leads to micelle-to-unimer transition. This is accompanied by concomitant fluorescence emission turn-on and triggered drug release, allowing for the process visualization.
Doubly Caged Linker for AND-Type Fluorogenic Construction of Protein/Antibody Bioconjugates and In Situ Quantification
作者:Guhuan Liu、Guohai Shi、Haoyue Sheng、Yanyan Jiang、Haojun Liang、Shiyong Liu
DOI:10.1002/anie.201702748
日期:2017.7.17
In situquantification of the conjugation efficiency of azide‐terminated synthetic polymers/imaging probes and thiol‐functionalized antibodies/proteins/peptides was enabled by a doublycaged profluorescent and heterodifunctional core molecule C1 as a self‐sorting bridging unit. Orthogonal dual “click” coupling of C1 with azide‐ and thiol‐functionalized precursors led to highly fluorescent bioconjugates
A new magnetic nanoparticle-supported Schiff base complex of manganese: an efficient and recyclable catalyst for selective oxidation of alcohols
作者:Qiangfei Zhou、Zijuan Wan、Xiaofeng Yuan、Jun Luo
DOI:10.1002/aoc.3419
日期:2016.4
A new magneticnanoparticle‐supported Schiff base complex of manganese was prepared via the copper‐catalyzed ‘click’ reaction of an aminosalicylidene manganese complex bearing terminal alkynyl with azide‐functionalized shell–core magneticnanoparticles. The as‐prepared catalyst was applied in the oxidation of alcohols to corresponding aldehydes or ketones with high yield and selectivity when the reaction
molecules are non-toxic even at the highest tested concentration (100 μg mL−1). Some 3α-hydroxydeoxydihydroartemisinin-triazole derivatives (11a, 14a, 15a, 17a–22a) were also synthesized along with their peroxy counterparts. The antiproliferative activity results revealed that, except for compound 11a, all the compounds with peroxy functionality are more active than their 3α-hydroxydeoxy counterparts.
Benzaldehyde derivatives with functional propargyl groups as α-glucosidase inhibitors
作者:Seyit Ali Güngör、Mehmet Tümer、Muhammet Köse、Sultan Erkan
DOI:10.1016/j.molstruc.2020.127780
日期:2020.4
Abstract The benzaldehydederivatives (1–6) containing one and/or two propargyl arm(s) attached to the phenolic hydroxyl oxygen atom on the ortho-, meta- or para-positions of the aromatic ring were synthesized and characterized by spectral and microanalytical methods. The molecular structures were of 1, 4–6 determined by the single crystal X-ray crystallography. The benzaldehydederivatives containing