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Dendrimer-magnetic nanoparticles as multiple stimuli responsive and enzymatic drug delivery vehicle

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Title Dendrimer-magnetic nanoparticles as multiple stimuli responsive and enzymatic drug delivery vehicle
 
Creator CHANDRA, S
NORONHA, G
DIETRICH, S
LANG, H
BAHADUR, D
 
Subject PORE-SIZE
RELEASE
DOXORUBICIN
DESIGN
Magnetic nanoparticles
Dendrimers
Drug loading
Enzymatic release
Doxorubicin
 
Description Two different chain lengths of (poly)ethylene glycol-PAMAM dendrimers namely. L6-PEG-PAMAM and 56-PEG-PAMAM with six end-grafted ethylene glycol ether-tentacles of type CH2CH2C(O)O(CH2CH2O)(9)CH3 and CH2CH2C(O)O(CH2CH2O)(2)C2H5, respectively, were synthesized. These dendrimers have multiple sigma-donor capabilities and therefore, were used for stabilizing the magnetite (Fe3O4) nanoparticles. Both the dendrimer-magnetic nanoparticles (L6-PEG-PAMAM-MNPs and S6-PEG-PAMAM-MNPs) were characterized by different spectroscopic and microstructural techniques. The nanoparticles were mesoporous and superparamagnetic and therefore, explored for their possible use in delivery of cancer drug, doxorubicin (DOX). In the developed drug delivery system, achieving high drug-loading efficiency with controllable release were the main challenges. The change in zeta potential and quenching of fluorescence intensity suggests chemical interaction between DOX and the nanoparticles. The loading efficiency was calculated to be over 95% with a sustained pH and temperature sensitive release. Further, enzyme cathepsin B has also been used to degrade the dendritic shell to trigger sustained drug release in the vicinity of tumor cells. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-14T14:28:31Z
2016-01-14T14:28:31Z
2015
 
Type Article
 
Identifier JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 380,7-12
0304-8853
1873-4766
http://dx.doi.org/10.1016/j.jmmm.2014.10.000
http://dspace.library.iitb.ac.in/jspui/handle/100/17727
 
Language en