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Fabrication of a Functionalized Magnetic Bacterial Nanocellulose with Iron Oxide Nanoparticles
Published on: May 26, 2016
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GO-Functionalized Large Magnetic Iron Oxide Nanoparticles with Enhanced Colloidal Stability and Hyperthermia
Pon Janani Sugumaran1, Xiao-Li Liu2, Tun Seng Herng1
1Department of Materials Science and Engineering , 9 Engineering Drive 1 , Singapore 117574.
ACS Applied Materials & Interfaces
|June 28, 2019
Summary
Iron-oxide nanoparticles (IONPs) were stabilized on graphene oxide (GO) sheets, significantly improving their performance for magnetic hyperthermia cancer treatment. The resulting PEGylated nanocomposites demonstrated potent antitumor effects in mice.
Area of Science:
- Biomedical Engineering
- Materials Science
- Nanotechnology
Background:
- Iron-oxide nanoparticles (IONPs) are promising for biomedical applications like magnetic hyperthermia due to their magnetization and biocompatibility.
- Colloidal instability of IONPs often limits their application, necessitating stable carriers for enhanced performance.
- Graphene oxide (GO) sheets offer a stable platform for IONPs, potentially improving magnetic hyperthermia efficacy.
Purpose of the Study:
- To engineer stable graphene oxide-IONPs (GO-IONPs) nanocomposites for enhanced magnetic hyperthermia.
- To evaluate the magnetic hyperthermia performance and colloidal stability of GO-IONPs with varying IONP sizes.
- To assess the antitumor efficacy of PEGylated GO-IONPs in a preclinical cancer model.
Main Methods:
- IONPs of different sizes (4-250 nm) were integrated into graphene oxide (GO) sheets.
- Specific absorption rate (SAR) and intrinsic loss power (ILP) were measured for GO-IONPs nanocomposites.
- GO-IONPs were functionalized with polyethylene glycol (PEG) to improve colloidal stability.
- Antitumor efficacy was evaluated using a 4T1-tumor model in mice.
Main Results:
- GO-IONPs exhibited excellent colloidal stability in aqueous solutions, even under strong magnetic fields.
- The highest specific absorption rate (SAR) of 5020 W/g and intrinsic loss power (ILP) of 12.21 nH m²/kg were achieved with 45 nm GO-IONPs.
- PEGylation maintained high ILP values and enhanced colloidal stability in biological environments.
- PEGylated 45 nm GO-IONPs demonstrated significant antitumor efficacy in mice at safe dosages.
Conclusions:
- The developed PEG-GO-IONP nanocomposite offers superior magnetic hyperthermia performance and colloidal stability.
- This novel material shows potential for effective cancer treatment via magnetic hyperthermia.
- The functional groups on GO provide opportunities for further biomedical applications, such as targeted drug delivery.
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