501
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Zheng T, Pang J, Tan G, He J, McPherson GL, Lu Y, John VT, Zhan J. Surfactant templating effects on the encapsulation of iron oxide nanoparticles within silica microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:5143-7. [PMID: 17397201 DOI: 10.1021/la063761+] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Hollow silica microspheres encapsulating ferromagnetic iron oxide nanoparticles were synthesized by a surfactant-aided aerosol process and subsequent treatment. The cationic surfactant cetyltrimethyl ammonium bromide (CTAB) played an essential role in directing the structure of the composite. Translation from mesoporous silica particles to hollow particles was a consequence of increased loading of ferric species in the precursor solution and the competitive partitioning of CTAB between silicate and ferric colloids. The hypothesis was that CTAB preferentially adsorbed onto more positively charged ferric colloids under acidic conditions. At a critical Fe/Si ratio, most of the CTAB was adsorbed onto ferric colloids and coagulated the colloids to form larger clusters. During the aerosol process, a silica shell was first formed due to the preferred silicate condensation on the gas-liquid interface of the aerosol droplet. Subsequent drying concentrated the ferric clusters inside the silica shell and resulted in a silica shell/ferric core particle. Thermal treatment of the core shell particle led to encapsulation of a single iron oxide nanoparticle inside each silica hollow microsphere.
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Affiliation(s)
- Tonghua Zheng
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, USA
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502
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Ji X, Shao R, Elliott AM, Stafford RJ, Esparza-Coss E, Bankson JA, Liang G, Luo ZP, Park K, Markert JT, Li C. Bifunctional Gold Nanoshells with a Superparamagnetic Iron Oxide-Silica Core Suitable for Both MR Imaging and Photothermal Therapy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2007; 111:6245-6251. [PMID: 20165552 PMCID: PMC2822349 DOI: 10.1021/jp0702245] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We describe the synthesis, characterization, and use of hybrid nanoparticles with a superparamagnetic iron oxide (SPIO) core and a gold nanoshell. These multifunctional nanoparticles, designated SPIO-Au nanoshells, displayed superparamagnetic characteristics and a significant absorbance in the near-infrared (NIR) region of the electromagnetic spectrum. In addition, they exhibited high transverse relaxivity, r2 , and a large r2/r1 ratio and therefore could be imaged by MRI to obtain T2-weighted images. Moreover, SPIO-Au nanoshells showed efficient photo-thermal effect when exposed to NIR light. The use of SPIO-Au nanoshells, with their combination of unique magnetic and optical properties, should enhance the efficacy of nanoshell-mediated photo-thermal therapy by making it possible to direct more nanoparticles to tumors through the application of external magnetic field and by permitting real-time in vivo MRI imaging of the distribution of the nanoparticles before, during, and after photo-thermal therapy.
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Affiliation(s)
- Xiaojun Ji
- Department of Experimental Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Ruping Shao
- Department of Experimental Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Andrew M. Elliott
- Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - R. Jason Stafford
- Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Emilio Esparza-Coss
- Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - James A. Bankson
- Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Gan Liang
- Department of Physics, Sam Houston State University, Huntsville, Texas 77341
| | - Zhi-Ping Luo
- Microscopy and Imaging Center, Texas A&M University, College Station, Texas 77843
| | - Keeseong Park
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712
| | - John T. Markert
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712
| | - Chun Li
- Department of Experimental Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
- Corresponding author: Chun Li, PhD, Department of Experimental Diagnostic Imaging-Box 57, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030. Phone: (713) 792-5182. Fax: (713) 794-5456.
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503
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Abstract
The marriage of physics, chemistry and biology at the namometric scale, nanotechnology, is a powerful technology which is predicted to have a large impacto on life sciences and particularly cancer treatment. In the following we will show some examples of applications which has already reached clinical treatments as new ideas which may positively influence the understanding, diagnosis and therapy of cancer.
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Affiliation(s)
- Oscar Gallego
- Departament d'Oncologia. Hospital de Sant Pau. Barcelona. Spain
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504
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Wang X, Zhang R, Wu C, Dai Y, Song M, Gutmann S, Gao F, Lv G, Li J, Li X, Guan Z, Fu D, Chen B. The application of Fe
3
O
4
nanoparticles in cancer research: A new strategy to inhibit drug resistance. J Biomed Mater Res A 2006; 80:852-60. [PMID: 17072850 DOI: 10.1002/jbm.a.30901] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Although much effort has been extended to the efficient cancer therapies, the drug resistance is still a major obstacle in cancer chemotherapeutic treatments. Almost 90% of the cancer therapy failure is caused by the relative problems. Recently, the application of drug coated polymer nanospheres and nanoparticles to inhibit the related drug resistance has attracted much attention. In this report, we have explored a novel strategy to inhibit the multidrug resistance of the targeted tumor cells by combining the unique properties of tetraheptylammonium capped Fe(3)O(4) magnetic nanoparticles with the drug accumulation of anticancer drug daunorubicin. Our results of confocal fluorescence and atomic force microscopy (AFM) as well as electrochemical studies demonstrate the remarkable synergistic effect of Fe(3)O(4) nanoparticles on drug uptake of daunorubicin in leukemia K562 cells. These observations indicate that the interaction between the magnetic nanoparticles Fe(3)O(4) and biologically active molecules on the membrane of leukemia cell lines may contribute to their beneficial effect on cellular uptake so that the synergistic enhanced effect of magnetic nanoparticles Fe(3)O(4) on drug uptake of drug resistance leukemia K562 cells could be observed upon application of the Fe(3)O(4) nanoparticles.
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Affiliation(s)
- Xuemei Wang
- State Key Lab of Bioelectronics, Chien-Shiung Wu Laboratory, Southeast University, Nanjing 210096, People's Republic of China.
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505
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Zhang R, Wang X, Wu C, Song M, Li J, Lv G, Zhou J, Chen C, Dai Y, Gao F, Fu D, Li X, Guan Z, Chen B. Synergistic enhancement effect of magnetic nanoparticles on anticancer drug accumulation in cancer cells. NANOTECHNOLOGY 2006; 17:3622-3626. [PMID: 19661614 DOI: 10.1088/0957-4484/17/14/043] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Three kinds of magnetic nanoparticle, tetraheptylammonium capped nanoparticles of Fe(3)O(4), Fe(2)O(3) and Ni have been synthesized, and the synergistic effect of these nanoparticles on the drug accumulation of the anticancer drug daunorubicin in leukaemia cells has been explored. Our observations indicate that the enhancement effect of Fe(3)O(4) nanoparticles is much stronger than that of Fe(2)O(3) and Ni nanoparticles, suggesting that nanoparticle surface chemistry and size as well as the unique properties of the magnetic nanoparticles themselves may contribute to the synergistic enhanced effect of the drug uptake of targeted cancer cells.
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Affiliation(s)
- Renyun Zhang
- State Key Lab of Bioelectronics, Chien-Shiung Wu Laboratory, Southeast University, Nanjing 210096, People's Republic of China
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506
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Mondalek FG, Zhang YY, Kropp B, Kopke RD, Ge X, Jackson RL, Dormer KJ. The permeability of SPION over an artificial three-layer membrane is enhanced by external magnetic field. J Nanobiotechnology 2006; 4:4. [PMID: 16603066 PMCID: PMC1475881 DOI: 10.1186/1477-3155-4-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Accepted: 04/07/2006] [Indexed: 12/02/2022] Open
Abstract
Background Sensorineural hearing loss, a subset of all clinical hearing loss, may be correctable through the use of gene therapy. We are testing a delivery system of therapeutics through a 3 cell-layer round window membrane model (RWM model) that may provide an entry of drugs or genes to the inner ear. We designed an in vitro RWM model similar to the RWM (will be referred to throughout the paper as RWM model) to determine the feasibility of using superparamagnetic iron oxide (Fe3O4) nanoparticles (SPION) for targeted delivery of therapeutics to the inner ear. The RWM model is a 3 cell-layer model with epithelial cells cultured on both sides of a small intestinal submucosal (SIS) matrix and fibroblasts seeded in between. Dextran encapsulated nanoparticle clusters 130 nm in diameter were pulled through the RWM model using permanent magnets with flux density 0.410 Tesla at the pole face. The SIS membranes were harvested at day 7 and then fixed in 4% paraformaldehyde. Transmission electron microscopy and fluorescence spectrophotometry were used to verify transepithelial transport of the SPION across the cell-culture model. Histological sections were examined for evidence of SPION toxicity, as well to generate a timeline of the position of the SPION at different times. SPION also were added to cells in culture to assess in vitro toxicity. Results Transepithelial electrical resistance measurements confirmed epithelial confluence, as SPION crossed a membrane consisting of three co-cultured layers of cells, under the influence of a magnetic field. Micrographs showed SPION distributed throughout the membrane model, in between cell layers, and sometimes on the surface of cells. TEM verified that the SPION were pulled through the membrane into the culture well below. Fluorescence spectrophotometry quantified the number of SPION that went through the SIS membrane. SPION showed no toxicity to cells in culture. Conclusion A three-cell layer model of the human round window membrane has been constructed. SPION have been magnetically transported through this model, allowing quantitative evaluation of prospective targeted drug or gene delivery through the RWM. Putative in vivo carrier superparamagnetic nanoparticles may be evaluated using this model.
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Affiliation(s)
- Fadee G Mondalek
- Department of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, OK, USA
| | - Yuan Yuan Zhang
- Department of Urology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Bradley Kropp
- Department of Urology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | | | - Xianxi Ge
- Naval Medical Center, San Diego, CA, USA
| | | | - Kenneth J Dormer
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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507
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van Vlerken LE, Amiji MM. Multi-functional polymeric nanoparticles for tumour-targeted drug delivery. Expert Opin Drug Deliv 2006; 3:205-16. [PMID: 16506948 DOI: 10.1517/17425247.3.2.205] [Citation(s) in RCA: 213] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The use of nanoparticles as drug delivery vehicles for anticancer therapeutics has great potential to revolutionise the future of cancer therapy. As tumour architecture causes nanoparticles to preferentially accumulate at the tumour site, their use as drug delivery vectors results in the localisation of a greater amount of the drug load at the tumour site; thus improving cancer therapy and reducing the harmful nonspecific side effects of chemotherapeutics. In addition, formulation of these nanoparticles with imaging contrast agents provides a very efficient system for cancer diagnostics. Given the exhaustive possibilities available to polymeric nanoparticle chemistry, research has quickly been directed at multi-functional nanoparticles, combining tumour targeting, tumour therapy and tumour imaging in an all-in-one system, providing a useful multi-modal approach in the battle against cancer. This review will discuss the properties of nanoparticles that allow for such multiple functionality, as well as recent scientific advances in the area of multi-functional nanoparticles for cancer therapeutics.
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Affiliation(s)
- Lilian E van Vlerken
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA 02115, USA
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508
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Shen HB, Long DH, Zhu LZ, Li XY, Dong YM, Jia NQ, Zhou HQ, Xin X, Sun Y. Magnetic force microscopy analysis of apoptosis of HL-60 cells induced by complex of antisense oligonucleotides and magnetic nanoparticles. Biophys Chem 2006; 122:1-4. [PMID: 16500021 DOI: 10.1016/j.bpc.2006.01.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2005] [Revised: 01/10/2006] [Accepted: 01/10/2006] [Indexed: 11/24/2022]
Abstract
Magnetic force microscopy (MFM) has been employed to observe antisense oligonucleotides (ASOs)-coupled silica-coated magnetic iron oxide nanoparticles (SMNPs) internalized into human leukemia (HL-60) cells. The experiment demonstrated that the ASOs-coupled SMNPs delivery into the cells really occurred. The nanoparticles were internalized into the cells and the apoptotic topography can be directly visualized simultaneously with MFM technology. These present observations offer direct morphology evidence on studying the apoptosis of tumor cells and provide useful information for better design of new diagnostic and therapeutic tools in tumor treatment.
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Affiliation(s)
- He-bai Shen
- Life and Environment Science College, Shanghai Normal University, Shanghai 200234, PR China.
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509
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Kuhn SJ, Hallahan DE, Giorgio TD. Characterization of Superparamagnetic Nanoparticle Interactions with Extracellular Matrix in an in Vitro System. Ann Biomed Eng 2006; 34:51-8. [PMID: 16477503 DOI: 10.1007/s10439-005-9004-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2005] [Accepted: 08/30/2005] [Indexed: 11/26/2022]
Abstract
Controlled dispersion of therapeutic agents within liquid- and gel-filled cavities represents a barrier to treatment of some cancers and other pathological states. Interstitial delivery is compromised by the poor mobility of macromolecules and larger nanoscale structures. We developed an in vitro system to quantify the suitability of superparamagnetic nanoparticles (SPM NPs) as a site-specific therapeutic vehicle for delivery through fluid- and gel-based systems. SPM NP motion was induced by an external magnetic field. NP migration was modulated by NP concentration and surface coating. 135 nanometer radius PEGylated NPs moved through the extracellular matrix with an average velocity of 1.5 mm h(-1), suitable for some clinical applications. Increasing the SPM NP radius to 400 nm while maintaining the same per NP magnetic susceptibility resulted in a greater than 1,000-fold reduction in magnetic mobility, to less than 0.01 mm h(-1). The critical influence of NP size on gel permeation was also observed in silica-coated 135 nm SPM NPs that aggregated under the experimental conditions. Aggregation played a critical role in determining the behavior of the nanoparticles. SPM NPs allow significant free-solution mobility to specific sites within a cavity and generate sufficient force to penetrate common in vivo gels.
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Affiliation(s)
- Sam J Kuhn
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37232-8180, USA
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510
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Sunderland CJ, Steiert M, Talmadge JE, Derfus AM, Barry SE. Targeted nanoparticles for detecting and treating cancer. Drug Dev Res 2006. [DOI: 10.1002/ddr.20069] [Citation(s) in RCA: 183] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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511
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Tsuji JS, Maynard AD, Howard PC, James JT, Lam CW, Warheit DB, Santamaria AB. Research Strategies for Safety Evaluation of Nanomaterials, Part IV: Risk Assessment of Nanoparticles. Toxicol Sci 2005; 89:42-50. [PMID: 16177233 DOI: 10.1093/toxsci/kfi339] [Citation(s) in RCA: 215] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Nanoparticles are small-scale substances (<100 nm) with unique properties and, thus, complex exposure and health risk implications. This symposium review summarizes recent findings in exposure and toxicity of nanoparticles and their application for assessing human health risks. Characterization of airborne particles indicates that exposures will depend on particle behavior (e.g., disperse or aggregate) and that accurate, portable, and cost-effective measurement techniques are essential for understanding exposure. Under many conditions, dermal penetration of nanoparticles may be limited for consumer products such as sunscreens, although additional studies are needed on potential photooxidation products, experimental methods, and the effect of skin condition on penetration. Carbon nanotubes apparently have greater pulmonary toxicity (inflammation, granuloma) in mice than fine-scale carbon graphite, and their metal content may affect toxicity. Studies on TiO2 and quartz illustrate the complex relationship between toxicity and particle characteristics, including surface coatings, which make generalizations (e.g., smaller particles are always more toxic) incorrect for some substances. These recent toxicity and exposure data, combined with therapeutic and other related literature, are beginning to shape risk assessments that will be used to regulate the use of nanomaterials in consumer products.
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