Preparation and characterization of stimuli-responsive magnetic nanoparticles

被引：27

作者：

Wang, ShiXing ^{[1
,2
]}

Zhou, Yang ^{[1
,2
]}

Guan, Wen ^{[1
]}

Ding, Bingjun ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Sci, Xian 710049, Peoples R China

[2] Natl Ctr Nanosci & Technol, Beijing, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2008年 / 3卷 / 08期

关键词：

site-specific delivery; surface chemistry; nanoparticles; biomaterials; conjugation; controlled release;

D O I：

10.1007/s11671-008-9151-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, the main attention was focused on the synthesis of stimuli-responsive magnetic nanoparticles (SR-MNPs) and the influence of glutathione concentration on its cleavage efficiency. Magnetic nanoparticles (MNPs) were first modified with activated pyridyldithio. Then, MNPs modified with activated pyridyldithio (MNPs-PDT) were conjugated with 2, 4-diamino-6-mercaptopyrimidine (DMP) to form SR-MNPs via stimuli-responsive disulfide linkage. Fourier transform infrared spectra (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize MNPs-PDT. The disulfide linkage can be cleaved by reduced glutathione (GHS). The concentration of glutathione plays an important role in controlling the cleaved efficiency. The optimum concentration of GHS to release DMP is in the millimolar range. These results had provided an important insight into the design of new MNPs for biomedicine applications, such as drug delivery and bio-separation.

引用

页码：289 / 294

页数：6

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