A coil system for real-time magnetic fluid hyperthermia microscopy studies

Area of Science:

• Biophysics
• Biomedical Engineering
• Cell Biology

Background:

• Magnetic nanoparticles (MNPs) are utilized in various biomedical applications, including targeted drug delivery and hyperthermia.
• Magnetic fluid hyperthermia (MFH) involves using alternating magnetic fields (AMFs) to generate heat from MNPs for therapeutic purposes.
• Real-time observation of cellular responses to AMFs and MNPs is crucial for understanding MFH mechanisms and optimizing treatments.

Purpose of the Study:

• To design and apply a novel apparatus for applying radiofrequency (RF) electromagnetic fields to cells in culture on a microscope stage.
• To enable real-time studies of magnetic nanoparticle actuation and MFH-associated effects within cells.
• To provide a versatile platform for in vitro research on AMF-mediated cellular responses.

Main Methods:

• Fabrication of RF coils and performance of electromagnetic simulations.
• Compatibility evaluations and calorimetric experiments at frequencies from 100 kHz to 1 MHz.
• Investigation of MFH-induced cell killing in a neuroblastoma cell line using the developed apparatus.

Main Results:

• A planar coil configuration demonstrated optimal field intensity and homogeneity for cellular exposure.
• The incubation chamber design is compatible with standard cell culture practices and various microscope mounts.
• Successful proof-of-principle experiments for calorimetry and MFH cytotoxicity were conducted.

Conclusions:

• The developed RF coil apparatus, integrated with an incubation chamber and microscope, significantly benefits AMF-mediated activation and MFH research.
• This novel design facilitates real-time in vitro studies of MFH, advancing the understanding and application of this therapeutic modality.