Photodynamic therapy of Ehrlich carcinoma in mice with liposomal boronated chlorin e6

«Radiation and Risk», 2020, vol. 29, No. 3, pp.42-51

DOI: 10.21870/0131-3878-2020-29-3-42-51

Authors

Abramova O.B. – Head Lab., C. Sc., Med. Contacts: 4 Korolyov str., Obninsk, Kaluga region, Russia, 249035. Tel.: 8 (910) 510-08-62; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .
Drozhzhina V.V. – Researcher
Churikova T.P. – Researcher Assistant
Beregovskaya E.A. – Research Assistant
Kaplan M.A. – Head of Dep., MD, Prof.
Ivanov S.A. – Director, MD, Prof. A. Tsyb MRRC.
Kaprin A.D. – General Director, Academician of RAS, MD, Prof. NMRRC.

A. Tsyb MRRC, Obninsk
1 NMRRC Russian Ministry of Health, Moscow

Abstract

This paper reports results of estimating effectiveness of the liposomal boronated chlorin e6 photosensitizer for photodynamic therapy. For the study Ehrilich carcinoma-bearing mice were used as a model. Pharmacokinetics of the photosensitizer, its accumulation in tumor and other organs and tissues was studied to determine the optimal time interval between chlorin e6 administration and laser irradiation. Effectiveness of the treatment was evaluated by the following parameters: completeness of tumor regression (%); tumor absolute growth rate in mice with the continued tumor growth; life expectancy increase (%) in tumor-bearing mice compared to the control animals; evidence of tumor recurrence during 90 days after the treatment. The study revealed high antitumor effect of photodynamic therapy with liposomal boronated chlorin e6 photosensitizer on Ehrlich carcinoma in mice. The treatment performed within the optimal time interval between the photosensitizer administration and PDT produces the highest inhibiting effect on tumor.

Key words
photodynamic therapy, Ehrlich carcinoma, photosensitizer, accumulation dynamics, contrast index, laser, tumor growth inhibition, complete tumor regression, increase in life expectancy, treatment.

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