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Published on: August 22, 2014
Synthesis, characterization and biomedical application of multifunctional luminomagnetic core-shell nanoparticles
Changqing Yi1, Lei Liu2, Cheuk-Wing Li3
1Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institutes of City University of Hong Kong, Shenzhen, China; Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
Researchers developed novel luminomagnetic nanoparticles combining iron oxide and ruthenium for dual imaging. The silica shell enhanced biocompatibility, enabling targeted cancer cell recognition and potential diagnostic applications.
Area of Science:
- Nanomaterials Science
- Biomedical Engineering
- Materials Chemistry
Background:
- Nanomaterials offer versatile platforms for integrating multiple functionalities.
- Multifunctional nanoparticles are crucial for advanced diagnostic and therapeutic applications.
- Luminomagnetic nanoparticles combine optical and magnetic properties for synergistic effects.
Purpose of the Study:
- To synthesize and characterize novel luminomagnetic core-shell nanoparticles (NPs).
- To investigate the optical, magnetic, and biocompatibility properties of these NPs.
- To evaluate their potential for simultaneous bioimaging and targeted cancer cell recognition.
Main Methods:
- Facile synthesis of Fe3O4 core-shell NPs with a silica shell incorporating [Ru(bpy)3](2+).
- Characterization using spectroscopy, electron microscopy, and magnetic measurements.
- In vitro assessment of cell viability (Alamar blue assay), cell proliferation, and cellular uptake (flow cytometry, confocal microscopy, TEM, MR imaging) in HepG2 cells.
- Functionalization with epidermal growth factor receptor (EGFR) antibody for targeted cell recognition.
Main Results:
- Monodisperse spherical NPs (60±10 nm) exhibited strong red-orange fluorescence and super-paramagnetism (ca. 10 emu/g).
- Silica shell coating improved biocompatibility, enhancing HepG2 cell proliferation compared to bare Fe3O4 NPs.
- NPs successfully entered HepG2 cells, enabling simultaneous optical fluorescence and T2 MR imaging.
- EGFR antibody functionalization facilitated specific recognition of HepG2 cells.
Conclusions:
- The developed luminomagnetic NPs possess desirable optical and magnetic properties.
- The silica shell enhances biocompatibility and allows for surface functionalization.
- These NPs show significant potential as theranostic agents for cancer diagnosis and therapy.
