Multifunctional mesoporous nanoellipsoids for biological bimodal imaging and magnetically targeted delivery of anticancer drugs

Chen, Yu, Chen, Hangrong, Zhang, Shengjian, Chen, Feng, Zhang, Lingxia, Zhang, Jiamin, Zhu, Min, Wu, Huixia, Guo, Limin, Feng, Jingwei and Shi, Jianlin (2011) Multifunctional mesoporous nanoellipsoids for biological bimodal imaging and magnetically targeted delivery of anticancer drugs. Advanced Functional Materials, 21 2: 270-278. doi:10.1002/adfm.201001495


Author Chen, Yu
Chen, Hangrong
Zhang, Shengjian
Chen, Feng
Zhang, Lingxia
Zhang, Jiamin
Zhu, Min
Wu, Huixia
Guo, Limin
Feng, Jingwei
Shi, Jianlin
Title Multifunctional mesoporous nanoellipsoids for biological bimodal imaging and magnetically targeted delivery of anticancer drugs
Journal name Advanced Functional Materials   Check publisher's open access policy
ISSN 1616-301X
1616-3028
Publication date 2011-01-21
Sub-type Article (original research)
DOI 10.1002/adfm.201001495
Open Access Status
Volume 21
Issue 2
Start page 270
End page 278
Total pages 9
Place of publication Weinheim, Germany
Publisher Wiley - VCH
Language eng
Formatted abstract
A general polyelectrolyte-mediated self-assembly technique is adopted to prepare multifunctional mesoporous nanostructures as an effective biological bimodal imaging probe and magnetically targeted anticancer drug (doxorubicin) delivery systems (DDSs). A positively charged polyelectrolyte (PAH) and negatively charged fluorescent quantum dots (QDs) are successfully assembled onto the surface of ellipsoidal Fe3O4@SiO2@mSiO2 composite nanostructures to combine the merits of tunable fluorescent/magnetic properties, mesoporous nanostructures for drug loading, and the uniform ellipsoidal morphology for enhanced uptake by cancer cells. The resultant nanoellipsoids are homogeneously coated with four layers of PAH/QDs, with an additional PAH layer to make the ellipsoidal surface positively charged. This acts to enhance cellular uptake, which is driven by electrostatic interactions between the positive nanoparticle surface and the negative cell surface. The high biocompatibility of the achieved multifunctional nanoellipsoids is demonstrated by a cell-cytotoxicity assay, hemolyticity against human red blood cells, and coagulation evaluation of fresh human blood plasma after exposure to the nanoparticles. Moreover, confocal microscopy and bio-TEM observations show that the cell uptake of nanocarriers is dose-dependent, and the nanoparticles accumulate mostly in the cytoplasm. The excellent capability of the nanocarriers as contrast agents for MRI is demonstrated by the relatively high r2 value (143 mM−1s−1) and preliminary in vivo characterization. More importantly, the doxorubicin-loaded DDSs show higher cytotoxicity than the free doxorubicin drug as contributed by the intracellular release pathway of doxorubicin from the DDSs, indicating the potential application of the obtained multifunctional mesoporous nanoellipsoids as highly effective bimodal imaging probes and DDSs for cancer diagnosis and chemotherapy, simultaneously.
Keyword Drug delivery
Layer-by-layer self-assembly
Magnetite
Mesoporous silica
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 155 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 161 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 28 Oct 2014, 11:33:13 EST by System User on behalf of School of Chemical Engineering