Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles

Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles

Jie Zhou,1,* Jian Zhang,2,* Wenxi Gao11Department of Urology, Hubei Hospital of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Wuhan, People’s Republic of China; 2Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, USA*Th...

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Autores principales: Zhou J, Zhang J, Gao W
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Lenguaje:EN
Publicado: Dove Medical Press 2014
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Medicine (General)
R5-920
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spelling oai:doaj.org-article:c0fe89fcc2914b48890012ae05c161662021-12-02T00:10:20ZEnhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles1178-2013https://doaj.org/article/c0fe89fcc2914b48890012ae05c161662014-06-01T00:00:00Zhttp://www.dovepress.com/enhanced-and-selective-delivery-of-enzyme-therapy-to-9l-glioma-tumor-v-a17158https://doaj.org/toc/1178-2013 Jie Zhou,1,* Jian Zhang,2,* Wenxi Gao11Department of Urology, Hubei Hospital of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Wuhan, People’s Republic of China; 2Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, USA*These authors contributed equally to this workAbstract: The stability of enzyme-conjugated magnetic iron oxide nanoparticles in plasma is of great importance for in vivo delivery of the conjugated enzyme. In this study, ß-glucosidase was conjugated on aminated magnetic iron oxide nanoparticles using the glutaraldehyde method (ß-Glu-MNP), and further PEGylated via N-hydroxysuccinimide chemistry. The PEG-modified, ß-glucosidase-immobilized magnetic iron oxide nanoparticles (PEG-ß-Glu-MNPs) were characterized by hydrodynamic diameter distribution, zeta potential, Fourier transform infrared spectroscopy, transmission electron microscopy, and a superconducting quantum interference device. The results showed that the multidomain structure and magnetization properties of these nanoparticles were conserved well throughout the synthesis steps, with an expected diameter increase and zeta potential shifts. The Michaelis constant was calculated to evaluate the activity of conjugated ß-glucosidase on the magnetic iron oxide nanoparticles, indicating 73.0% and 65.4% of enzyme activity remaining for ß-Glu-MNP and PEG-ß-Glu-MNP, respectively. Both magnetophoretic mobility analysis and pharmacokinetics showed improved in vitro/in vivo stability of PEG-ß-Glu-MNP compared with ß-Glu-MNP. In vivo magnetic targeting of PEG-ß-Glu-MNP was confirmed by magnetic resonance imaging and electron spin resonance analysis in a mouse model of subcutaneous 9L-glioma. Satisfactory accumulation of PEG-ß-Glu-MNP in tumor tissue was successfully achieved, with an iron content of 627±45 nmol Fe/g tissue and ß-glucosidase activity of 32.2±8.0 mU/g tissue.Keywords: ß-glucosidase, enzyme/prodrug therapy, magnetic nanoparticles, magnetic targeting, 9L-gliomaZhou JZhang JGao WDove Medical PressarticleMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol 2014, Iss Issue 1, Pp 2905-2917 (2014)
institution DOAJ
collection DOAJ
language EN
topic Medicine (General)
R5-920
spellingShingle Medicine (General)
R5-920
Zhou J
Zhang J
Gao W
Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
description Jie Zhou,1,* Jian Zhang,2,* Wenxi Gao11Department of Urology, Hubei Hospital of Traditional Chinese Medicine, Hubei University of Chinese Medicine, Wuhan, People’s Republic of China; 2Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI, USA*These authors contributed equally to this workAbstract: The stability of enzyme-conjugated magnetic iron oxide nanoparticles in plasma is of great importance for in vivo delivery of the conjugated enzyme. In this study, ß-glucosidase was conjugated on aminated magnetic iron oxide nanoparticles using the glutaraldehyde method (ß-Glu-MNP), and further PEGylated via N-hydroxysuccinimide chemistry. The PEG-modified, ß-glucosidase-immobilized magnetic iron oxide nanoparticles (PEG-ß-Glu-MNPs) were characterized by hydrodynamic diameter distribution, zeta potential, Fourier transform infrared spectroscopy, transmission electron microscopy, and a superconducting quantum interference device. The results showed that the multidomain structure and magnetization properties of these nanoparticles were conserved well throughout the synthesis steps, with an expected diameter increase and zeta potential shifts. The Michaelis constant was calculated to evaluate the activity of conjugated ß-glucosidase on the magnetic iron oxide nanoparticles, indicating 73.0% and 65.4% of enzyme activity remaining for ß-Glu-MNP and PEG-ß-Glu-MNP, respectively. Both magnetophoretic mobility analysis and pharmacokinetics showed improved in vitro/in vivo stability of PEG-ß-Glu-MNP compared with ß-Glu-MNP. In vivo magnetic targeting of PEG-ß-Glu-MNP was confirmed by magnetic resonance imaging and electron spin resonance analysis in a mouse model of subcutaneous 9L-glioma. Satisfactory accumulation of PEG-ß-Glu-MNP in tumor tissue was successfully achieved, with an iron content of 627±45 nmol Fe/g tissue and ß-glucosidase activity of 32.2±8.0 mU/g tissue.Keywords: ß-glucosidase, enzyme/prodrug therapy, magnetic nanoparticles, magnetic targeting, 9L-glioma
format article
author Zhou J
Zhang J
Gao W
author_facet Zhou J
Zhang J
Gao W
author_sort Zhou J
title Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
title_short Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
title_full Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
title_fullStr Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
title_full_unstemmed Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, ß-glucosidase- conjugated iron oxide nanoparticles
title_sort enhanced and selective delivery of enzyme therapy to 9l-glioma tumor via magnetic targeting of peg-modified, ß-glucosidase- conjugated iron oxide nanoparticles
publisher Dove Medical Press
publishDate 2014
url https://doaj.org/article/c0fe89fcc2914b48890012ae05c16166
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AT zhangj enhancedandselectivedeliveryofenzymetherapyto9lgliomatumorviamagnetictargetingofpegmodifiedszligglucosidaseconjugatedironoxidenanoparticles
AT gaow enhancedandselectivedeliveryofenzymetherapyto9lgliomatumorviamagnetictargetingofpegmodifiedszligglucosidaseconjugatedironoxidenanoparticles
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