Problems of Radiation Medicine and Radiobiology

О. D. Pochapinskyi, G. Yо. Lavrenchuk, N. P. Atamaniuk, A. V. Chernyshov

State Institution «National Research Center for Radiation Medicine of the National Academy of Medical Sciences of Ukraine», 53 Yuriia Illienka Str., Kyiv, 04050, Ukraine

SELECTION AND TESTING OF EXPERIMENTAL MODELS OF NORMAL AND MALIGNANT HUMAN CELLS IN VITRO AND EVALUATION OF THEIR SENSITIVITY RANGE TO THE NEUTRON/CAPTURE AND PHOTON-CAPTURE AGENTS AND PHOTOSENSITIZERS

Objective: to investigate the structural and morpho-functional changes in test systems of malignant (A-549 cell line) and normal (fibroblasts of the 6th passage) human cells during incubation with gadolinium-containing photon-capture agent «Dotavist» and photosensitizer «Fotolon».
Methods. The passaged (continuously interweaved) cell culture technique on normal human fibroblasts and malignant human cells; cytological, biophysical, statistical methods.
Results. The cytotoxic properties of «Dotavist» gadolinium-containing photon-capturing agent and «Photolon» photosensitizer in a wide range of concentrations (5, 10, 25, 50, 100 and 200 μl/ml) were studied by the morphofunctional characteristics (growth kinetics, proliferative and mitotic activity, presence of atypical cells) in the in vitro test systems of malignant (non-small cell lung cancer cell line A-549) and normal (6th passage fibroblasts) human cells. It was found that the cytotoxic properties of «Dotavist» in test systems of malignant and normal cells are expressed under its administration in high concentrations (100 and 200 μl/ml). During incubation with «Photolon» photosensitizer the cytotoxic effect on malignant cells was determined at the lowest concentrations (5 and 10 μl/ml). Photosensitizer administration in the increasing concentrations has lead to genotoxic effects. Cytotoxic effect of photosensitizer on the normal human fibroblasts was evident in the 5-200 μl/ml concentration range. There was a moderate decrease in mitotic activity along with increasing concentration. Genotoxic properties of photosensitizer were evident at 25 μl/ml concentration and above.
Conclusion. Study results of the effectiveness of neutron-capture and photon-capture technologies by the sensitivity assay in the in vitro test systems of human malignant cells (non-small cell lung cancer cell line A-549) and normal cells (transplantable human fibroblast culture, the 6th passage) to the gadolinium-containing photon-capture «Dotavist» agent and «Photolon» photosensitizer in different concentrations provide the basis for pre-clinical stage of evaluating the effectiveness of medications used in binary technologies.
Key words: culture of human malignant cells, culture of human fibroblasts, neutron-capture agent, photon-capture agent, photosensitizer, proliferation, mitotic index.

Problems of Radiation Medicine and Radiobiology.
021;26:260-272. doi: 10.33145/2304-8336-2021-26-260-272

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