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Efficiency of Plasmonic Photothermal Therapy of Experimental Tumors

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Abstract

The purpose of this study was to investigate the prognostic factors of plasmonic photothermal therapy (PPT) efficiency in rats with transplanted liver cancer on the basis of assessment of the degree of tumor vascularization. Before any exposure, rats with transplanted liver cancer PC-1 were subjected to Doppler ultrasonography to assess the degree of vascularization of transplanted tumors. Half of the animals with the transplanted tumors were withdrawn from the experiment after Doppler ultrasonography to determine the content of vascular factors in blood serum by enzyme immunoassay and in tumor tissue by immunohistochemical method. After three intravenous injections of polyethylene glycol-coated gold nanorods (GNRs) at a dose of 0.4 mq/mL, the transplanted tumors were irradiated percutaneously with infrared laser radiation at a wavelength of 808 nm, followed by thermography of local tumor heating. The animals were withdrawn from the experiment 24 h later, and tumor tissue samples were taken for histological examination. It is found that the accumulation of gold in the tumor tissue and the PPT efficiency at repeated intravenous GNR injections are determined by the presence of formed vasculature in the tumor.

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Funding

Work performed under the state assignment of the Ministry of Health of the Russian Federation “Molecular Markers and Gold Nanoparticles: Application in Theranostics in Experimental and Clinical Oncology” (state registration no. 0203042330329) and the Russian Foundation for Basic Research (project no. 18-52-7803 (Ital-t)).

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Authors and Affiliations

  1. Razumovskii Saratov State Medical University, 410012, Saratov, Russia

    A. B. Bucharskaya, G. N. Maslyakova, M. L. Chekhonatskaya, N. B. Zakharova, G. S. Terentyuk & N. A. Navolokin

  2. Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 410012, Saratov, Russia

    B. N. Khlebtsov & N. G. Khlebtsov

  3. National Research Saratov State University, 410012, Saratov, Russia

    V. D. Genin, A. N. Bashkatov, E. A. Genina & V. V. Tuchin

  4. Tomsk State University, 634050, Tomsk, Russia

    V. D. Genin, A. N. Bashkatov, E. A. Genina & V. V. Tuchin

  5. Institute of Precision Mechanics and Control, Russian Academy of Sciences, 410028, Saratov, Russia

    V. V. Tuchin

Authors
  1. A. B. Bucharskaya
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  2. G. N. Maslyakova
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  3. M. L. Chekhonatskaya
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  4. N. B. Zakharova
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  5. G. S. Terentyuk
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  6. N. A. Navolokin
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  7. B. N. Khlebtsov
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  8. N. G. Khlebtsov
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  9. V. D. Genin
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  10. A. N. Bashkatov
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  11. E. A. Genina
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  12. V. V. Tuchin
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Corresponding author

Correspondence to A. B. Bucharskaya.

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Statement on the Welfare of Animals

The study was performed in accordance with international ethical standards of the European Convention for the protection of vertebrate animals for experimental and other scientific purposes (Strasbourg, 1986) as well as in accordance with the recommendations of the Committee on E-thics of the Razumovskii Saratov State Medical University, Ministry of Health of the Russian Federation (Minutes no. 6 of February 6, 2018). All applicable international, national, and/or institutional principles of care and use of animals were observed.

Conflict of Interest

The authors declare that they have no conflict of interest.

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Translated by M. Batrukova

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Bucharskaya, A.B., Maslyakova, G.N., Chekhonatskaya, M.L. et al. Efficiency of Plasmonic Photothermal Therapy of Experimental Tumors. Opt. Spectrosc. 128, 849–854 (2020). https://doi.org/10.1134/S0030400X2006003X

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  • DOI: https://doi.org/10.1134/S0030400X2006003X

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