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MRI Detectable Polymer Microspheres Embedded With Magnetic Ferrite Nanoclusters For Embolization: In Vitro And In
Xiao-Ya Qin1,2, Xiao-Xin Liu1,2, Zi-Yuan Li1,2
1The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, People's Republic of China.
International Journal of Nanomedicine
|December 11, 2019
Summary
Researchers developed novel magnetic ferrite nanocluster-loaded polymer microspheres (FNMs) for enhanced embolotherapy. These MRI-visualized microspheres show promise for improving treatment safety and effectiveness.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Medical Imaging
Background:
- Embolotherapy is a crucial medical procedure for treating various conditions.
- Current embolization techniques can face challenges in precise visualization and control.
- Developing advanced embolic materials is essential for improving treatment outcomes.
Purpose of the Study:
- To synthesize and characterize magnetic ferrite nanoclusters (FNs) for MRI visualization.
- To develop magnetic polymer microspheres (FNMs) incorporating FNs for embolotherapy.
- To evaluate the feasibility, safety, and efficacy of FNMs in preclinical models.
Main Methods:
- Microwave-assisted solvothermal synthesis of ferrite nanoclusters (FNs).
- Inverse suspension polymerization to create FNs-embedded polymer microspheres (FNMs).
- Comprehensive characterization of FNs and FNMs (morphology, size, magnetic properties, MRI relaxivity, biocompatibility).
- In vivo evaluation in mice (subcutaneous injection) and rabbits (kidney embolization).
Main Results:
- Successful synthesis of FNs with suitable properties for MRI probes.
- Fabrication of FNMs with controlled physicochemical and mechanical characteristics.
- Demonstrated MRI detectability and favorable biocompatibility of FNMs in vivo.
- Effective embolization of rabbit kidneys with MRI-visualized FNMs.
Conclusions:
- FNMs exhibit excellent MRI visualization capabilities.
- The developed FNMs are biocompatible and suitable for embolization.
- FNMs represent a promising advancement in MRI-guided embolotherapy.
Keywords:
embolizationmagnetic ferrite nanoclustersmagnetic resonance imagingmicrowave-assisted solvothermal methodpolymerized microspheres
