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Design and Validation of Experimental Setup for Cell Spheroid Radiofrequency-Induced Heating.

Ioannis Androulakis1, Riccardo Ferrero2, Rogier van Oossanen1,3

  • 1Department of Radiotherapy, Erasmus MC Cancer Institute, University Medical Center, 3015 GD Rotterdam, The Netherlands.

Sensors (Basel, Switzerland)
|May 13, 2023
PubMed
Summary

This study introduces a new method for precisely heating 3D cell spheroids using radiofrequency energy. This advancement aids in understanding hyperthermia

Keywords:
cells, culturedcombined modality therapydrug screening assays, antitumorelectromagnetic fieldshyperthermia, inducedtumor cells, cultured

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Area of Science:

  • Oncology
  • Biophysics
  • Biotechnology

Background:

  • Hyperthermia exhibits cytotoxic and sensitizing effects on cancer, but its dose-effect relationship and optimal combination with other therapies remain unclear.
  • Investigating hyperthermia's effects on cellular mechanisms requires advanced in vitro models that better mimic in vivo conditions.
  • Radiofrequency (RF) heating offers a precise method for applying hyperthermia, but requires specialized applicators for cellular studies.

Purpose of the Study:

  • To develop and validate an experimental setup for controlled RF-induced hyperthermia in 3D cell spheroids.
  • To establish a reliable in vitro model for quantifying cellular responses to hyperthermia.
  • To investigate the effects of hyperthermia on cellular mechanisms at the cellular scale.

Main Methods:

  • Development of a dedicated electromagnetic field applicator for RF-induced heating.
  • Design and validation of an experimental setup using conical polypropylene vials for heating 3D cell spheroids.
  • Utilizing 3D cell spheroids as a more representative in vitro model compared to 2D cultures.

Main Results:

  • A validated experimental setup capable of heating 3D cell spheroids using RF energy was successfully established.
  • The setup provides a reliable instrument for investigating hyperthermia effects at the cellular scale.
  • This method allows for more accurate characterization of thermal dose-effect relationships in cancer research.

Conclusions:

  • The developed RF heating setup enables precise hyperthermia application to 3D cell spheroids in vitro.
  • This system serves as a valuable tool for advancing the understanding of hyperthermia's cellular mechanisms and optimizing cancer treatment strategies.
  • Further research can utilize this model to explore synergistic effects of hyperthermia with other oncological treatments.