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Related Experiment Videos

[Assay system for tumor control effect using encapsulated multicellular spheroid models]

S Nakamura1

  • 1Department of Dental Radiology and Radiation Research, Faculty of Dentistry, Tokyo Medical and Dental University.

Kokubyo Gakkai Zasshi. the Journal of the Stomatological Society, Japan
|August 26, 1998
PubMed
Summary

Developing novel experimental techniques is crucial for advancing head and neck cancer treatments. This study presents a microencapsulation method to assess radiotherapy and chemoradiotherapy effectiveness on multicellular tumor spheroids in vivo.

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Area of Science:

  • Oncology
  • Biotechnology
  • Radiation Biology

Context:

  • Advanced head and neck cancers often require radiotherapy or chemoradiotherapy due to inoperability.
  • Improving the efficacy of combined chemoradiotherapy is essential for enhancing cancer curability.
  • Quantitative analysis of factors influencing treatment effectiveness has been a barrier to therapeutic progress.

Purpose:

  • To establish an experimental technique for evaluating the in vivo efficacy of radiotherapy or chemoradiotherapy.
  • To assess the effects on multicellular tumor spheroids encapsulated within microcapsules.
  • To provide a model for analyzing therapeutic agent effectiveness in human solid tumors.

Summary:

  • Mouse squamous carcinoma cells were encapsulated in microcapsules and cultured to form multicellular spheroids.

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  • These spheroids were subjected to X-irradiation both in vitro and in vivo after grafting into nude mice.
  • The in vivo dose-cell survival curve exhibited a biphasic pattern, including a radioresistant component absent in vitro.

    • Impact:

    • The developed microencapsulation technique is applicable to human tumor cells.
    • This method offers a valuable tool for assessing the effectiveness of therapeutic agents.
    • It serves as a relevant in vivo model for human solid tumors, aiding therapeutic development.