Use of X-Ray Fluorescence Microscopy for Studies on Research Models of Hepatocellular Carcinoma

Tatjana Paunesku, Andrew C. Gordon, Sarah White, Kathleen Harris, Olga Antipova, Evan Maxey, Stefan Vogt, Anthony Smith, Luiza Daddario, Daniele Procissi, Andrew Christian Larson, Gayle E. Woloschak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: TheraSphere® microspheres containing yttrium 90Y are among many radioembolization agents used clinically to reduce liver tumor burden, and their effects on cancer volume reduction are well-established. At the same time, concerns about off target tissue injury often limit their use. Deeper investigation into tissue distribution and long-term impact of these microspheres could inform us about additional ways to use them in practice. Methods: Healthy rat liver and rabbit liver tumor samples from animals treated with TheraSpheres were sectioned and their elemental maps were generated by X-ray fluorescence microscopy (XFM) at the Advanced Photon Source (APS) synchrotron at Argonne National Laboratory (ANL). Results: Elemental imaging allowed us to identify the presence and distribution of TheraSpheres in animal tissues without the need for additional sample manipulation or staining. Ionizing radiation produced by 90Y radioactive contaminants present in these microspheres makes processing TheraSphere treated samples complex. Accumulation of microspheres in macrophages was observed. Conclusions: This is the first study that used XFM to evaluate the location of microspheres and radionuclides in animal liver and tumor samples introduced through radioembolization. XFM has shown promise in expanding our understanding of radioembolization and could be used for investigation of human patient samples in the future.

Original languageEnglish (US)
Article number711506
JournalFrontiers in Public Health
Volume9
DOIs
StatePublished - Aug 20 2021

Keywords

  • hepatocellular carcinoma
  • rabbit (Lagomorph)
  • radioembolization of liver malignancies
  • X-ray fluorescence microscopy
  • yttrium 90 microspheres

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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