scholarly journals Superparamagnetic Iron Oxide Nanoparticles Coated with Galactose-Carrying Polymer for Hepatocyte Targeting

2007 ◽  
Vol 2007 ◽  
pp. 1-9 ◽  
Author(s):  
Mi Kyong Yoo ◽  
In Yong Kim ◽  
Eun Mi Kim ◽  
Hwan-Jeong Jeong ◽  
Chang-Moon Lee ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Laser Scanning ◽  
Superparamagnetic Iron Oxide ◽  
Laser Scanning Microscopy ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Mri Contrast Agent ◽  
Confocal Laser ◽  
Oxide Nanoparticles ◽  
Specific Accumulation

Our goal is to develop the functionalized superparamagnetic iron oxide nanoparticles (SPIONs) demonstrating the capacities to be delivered in liver specifically and to be dispersed in physiological environment stably. For this purpose, SPIONs were coated with polyvinylbenzyl-O-β-D-galactopyranosyl-D-gluconamide (PVLA) having galactose moieties to be recognized by asialoglycoprotein receptors (ASGP-R) on hepatocytes. For use as a control, we also prepared SPIONs coordinated with 2-pyrrolidone. The sizes, size distribution, structure, and coating of the nanoparticles were characterized by transmission electron microscopy (TEM), electrophoretic light scattering spectrophotometer (ELS), X-ray diffractometer (XRD), and Fourier transform infrared (FT-IR), respectively. Intracellular uptake of the PVLA-coated SPIONs was visualized by confocal laser scanning microscopy, and their hepatocyte-specific delivery was also investigated through magnetic resonance (MR) images of rat liver. MRI experimental results indicated that the PVLA-coated SPIONs possess the more specific accumulation property in liver compared with control, which suggests their potential utility as liver-targeting MRI contrast agent.

scholarly journals Effects of Antifungal Carriers Based on Chitosan-Coated Iron Oxide Nanoparticles on Microcosm Biofilms

Antibiotics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 588
Author(s):  
Anne Caroline Morais Caldeirão ◽  
Heitor Ceolin Araujo ◽  
Camila Miranda Tomasella ◽  
Caio Sampaio ◽  
Marcelo José dos Santos Oliveira ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Lactic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Laser Scanning ◽  
Fungal Infections ◽  
Mutans Streptococci ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Oxide Nanoparticles

Resistance of Candida species to conventional therapies has motivated the development of antifungal nanocarriers based on iron oxide nanoparticles (IONPs) coated with chitosan (CS). This study evaluates the effects of IONPs-CS as carriers of miconazole (MCZ) or fluconazole (FLZ) on microcosm biofilms. Pooled saliva from two healthy volunteers supplemented with C. albicans and C. glabrata was the inoculum for biofilm formation. Biofilms were formed for 96 h on coverslips using the Amsterdam Active Attachment model, followed by 24 h treatment with nanocarriers containing different concentrations of each antifungal (78 and 156 µg/mL). MCZ or FLZ (156 µg/mL), and untreated biofilms were considered as controls. Anti-biofilm effects were evaluated by enumeration of colony-forming units (CFUs), composition of the extracellular matrix, lactic acid production, and structure and live/dead biofilm cells (confocal laser scanning microscopy-CLSM). Data were analyzed by one-way ANOVA and Fisher LSD’s test (α = 0.05). IONPs-CS carrying MCZ or FLZ were the most effective treatments in reducing CFUs compared to either an antifungal agent alone for C. albicans and MCZ for C. glabrata. Significant reductions in mutans streptococci and Lactobacillus spp. were shown, though mainly for the MCZ nanocarrier. Antifungals and their nanocarriers also showed significantly higher proportions of dead cells compared to untreated biofilm by CLSM (p < 0.001), and promoted significant reductions in lactic acid, while simultaneously showing increases in some components of the extracellular matrix. These findings reinforce the use of nanocarriers as effective alternatives to fight oral fungal infections.

scholarly journals Use of Superparamagnetic Iron Oxide Nanoparticles (SPIONs) via Multiple Imaging Modalities and Modifications to Reduce Cytotoxicity: An Educational Review

2020 ◽  
Vol 1 (1) ◽  
pp. 105-135
Author(s):  
Nicholas Nelson ◽  
John Port ◽  
Mukesh Pandey
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Targeted Delivery ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Positron Emission ◽  
Multiple Imaging ◽  
Specific Accumulation ◽  
Magnetic Resonance Imaging Mri

The aim of the present educational review on superparamagnetic iron oxide nanoparticles (SPIONs) is to inform and guide young scientists and students about the potential use and challenges associated with SPIONs. The present review discusses the basic concepts of magnetic resonance imaging (MRI), basic construct of SPIONs, cytotoxic challenges associated with SPIONs, shape and sizes of SPIONs, site-specific accumulation of SPIONs, various methodologies applied to reduce cytotoxicity including coatings with various materials, and application of SPIONs in targeted delivery of chemotherapeutics (Doxorubicin), biotherapeutics (DNA, siRNA), and positron emission tomography (PET) imaging applications.

Cubic mesophase nanoparticles doped with superparamagnetic iron oxide nanoparticles: a new class of MRI contrast agent

RSC Advances ◽  
2012 ◽  
Vol 2 (16) ◽  
pp. 6655 ◽  
Author(s):  
Durga P. Acharya ◽  
Bradford A. Moffat ◽  
Anastasios Polyzos ◽  
Lynne Waddington ◽  
Greg Coia ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Contrast Agent ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Mri Contrast Agent ◽  
Oxide Nanoparticles ◽  
Mri Contrast ◽  
New Class
Sign in / Sign up

Export Citation Format

Share Document