Reduction-Triggered Transformation of Disulfide-Containing Micelles at Chemically Tunable Rates
作者:Zhengyu Deng、Shuai Yuan、Ronald X. Xu、Haojun Liang、Shiyong Liu
DOI:10.1002/anie.201802909
日期:2018.7.16
designing delivery nanocarriers and in vivo nanoreactors. Reported herein are disulfide‐crosslinked (DCL) micelles exhibiting reduction‐triggered switching of crosslinking modules and synchronized hydrophobic‐to‐hydrophilic transition. Tumor cell targeted DCL micelles undergo cytoplasmic milieu triggered disulfide cleavage and self‐immolative decaging reactions at chemically adjustable rates, generating
当设计递送纳米载体和体内纳米反应器时,在所需位置处的流通稳定性和货物释放/质量扩散之间存在难题。本文报道的是二硫键交联(DCL)胶束,其交联模块的还原触发转换和疏水性至亲水性转变的同步化。靶向肿瘤细胞的DCL胶束以化学可调节的速率经历细胞质环境触发的二硫键裂解和自焚降解反应,生成伯胺部分。由于高的局部浓度和表观胺p K a的抑制,因此发生了与相邻酯部分的广泛酰胺化反应。 在疏水性核内具有重要的价值,从而导致活细胞内部具有亲水性核的交联模块的转变和无痕交联(TCL)胶束的形成。我们进一步将这种设计原理与经诊断的磁共振波谱学纳米载体整合在一起,以通过增强的磁共振(MR)成像性能指导选择性的细胞内药物转运。
Controlled Ondansetron Release Based on Hydroxyethyl Starch Hydroxyethyl Methacrylate
作者:Muhammad Nazir Tahir、Ahmad Adnan、Eunae Cho、Seunho Jung
DOI:10.5012/bkcs.2012.33.12.4035
日期:2012.12.20
Presented study describes the synthesis of photo cross-linkable and water soluble hydroxyethyl starch hydroxyethyl methacrylate (HESHEMA) samples with different degree of substitution (DS) by functionalization of hydroxyethyl starch (HES) with hydroxyethyl methacrylate (HEMA) or hydroxyethyl methacrylate carbonylimidazole (HEMACI) in DMSO using two different routes. It was revealed that the reaction time for HESHEMA synthesis can be reduced from 5 days to 24 h by conducting the reaction at $80^\circ}C$ instead of at room temperature. Solubility of HESHEMA was found to be dependent on DS which in turn was dependent on ratio between HES and HEMA or HEMACI. HESHEMA samples with DS > 0.24 depicted insoluble in water, whereas the samples with DS < 0.05 did not form appreciable gel. HESHEMA samples with appropriate DS were converted into hydrogels by cross-linking polymer chains under UV radiations and resulting HESHEMA hydrogels showed swelling up to 1200%. Application of HESHEMA in controlled drug delivery was investigated by diffusion based encapsulation of Ondansetron, a serotonin 5-$HT_3$ receptor antagonist drug, mainly used for nausea and vomiting treatment.
Compounds, monomers, and polymers containing a carbonate linkage
申请人:Khosravi Ezat
公开号:US09650335B2
公开(公告)日:2017-05-16
The invention provides compounds and monomers having a carbonate linkage. The monomers can be used to form homopolymers or can be coupled with other monomers to provide a wide variety of non-homopolymers. The invention further provides a wide variety of compositions comprising the compounds, monomers, and polymers. In the exemplary structures below, Q, A, R, and n are as described herein.
Synthesis of polymeric 1-iminopyridinium ylides as photoreactive polymers
作者:Daniel Klinger、Katja Nilles、Patrick Theato
DOI:10.1002/pola.23832
日期:2010.2.15
by polymer analogous reactions on reactive precursor polymers. Quantitative conversion of the reactive groups was achieved with pentafluorophenyl ester containing polymers and newly synthesized photoreactive amines as well as by the reaction of poly(4‐vinylbenzoyl azide) with a photoreactive alcohol. The polymers obtained by both routes were examined regarding their photoreaction products and kinetics