Abstract
Purpose
This study aims to demonstrate that pulsed high-intensity focused ultrasound (pulsed-HIFU) may enhance the fructose-conjugated 4-borono-L-phenylalanine (BPA-Fr) accumulation in tumor lesion using 18F-FBPA-Fr microPET scans.
Procedures
To the mice bearing orthotopic SASC03 human tongue squamous carcinoma xenograft, a 2-min pulsed-HIFU was applied to tumor. Immediately after pulsed-HIFU treatment, 18F-FBPA-Fr was intravenously injected, and biological characterizations including microPET imaging and biodistribution were conducted.
Results
Both biodistribution studies and microPET imaging performed after intravenous injection of 18F-FBPA-Fr revealed higher tumor uptake in HIFU-treated mice than that of the control. CD31 and Ki-67 histochemical staining of tumor sections and H&E staining of nearby normal tissues revealed no significant difference between the pulsed-HIFU-treated mice and the control.
Conclusion
This study demonstrated that pulsed-HIFU was beneficial to the accumulation of boron drug in the head and neck tumor lesion and may enhance the therapeutic efficacy of clinical BNCT.
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Acknowledgement
The authors thank the financial support from Taipei Veterans General Hospital, Taipei, Taiwan (V100A-045 and VGHUST101-G1-2-3). The authors also appreciate the technical support from the Taiwan Mouse Clinic which is funded by the National Research Program for Biopharmaceuticals (NRPB) at the National Science Council (NSC) of Taiwan.
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The authors declare that they have no conflict of interest.
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Chun-Yi Wu and Pei-Chia Chan contributed equally to this work.
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Wu, CY., Chan, PC., Chou, LS. et al. Pulsed-Focused Ultrasound Enhances Boron Drug Accumulation in a Human Head and Neck Cancer Xenograft-Bearing Mouse Model. Mol Imaging Biol 16, 95–101 (2014). https://doi.org/10.1007/s11307-013-0675-2
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DOI: https://doi.org/10.1007/s11307-013-0675-2