The impact of concentration and administration time on the radiomodulating properties of undecylprodigiosin in vitro

  • Sandra Petrović Vinča Institute of Nuclear Sciences
  • Vesna Vasić Vinča Institute of Nuclear Sciences
  • Tatjana Mitrović Institute for Development of Water Resources “Jaroslav Černi”
  • Saša Lazović Institute of Physics Belgrade
  • Andreja Leskovac Vinča Institute of Nuclear Sciences

Abstract

Undecylprodigiosin pigment (UPP) is reported to display cytotoxic activity towards various types of tumours. Nevertheless, its efficacy in modifying the cellular response to ionising radiation is still unknown. In this study, the radiomodulating effects of UPP were investigated. The effects of UPP were assessed in vitro by treating cultures of human peripheral blood with UPP and ionising radiation using two treatment regimens, the UPP pre-irradiation treatment and UPP post-irradiation treatment. The activity of UPP was investigated evaluating its effects on the radiation-induced micronuclei formation, cell proliferation, and induction of apoptosis. The redox modulating effects of UPP were examined measuring the catalase activity and the level of malondialdehyde, as a measure of oxidative stress. The results showed that UPP effects on cellular response to ionising radiation depend on its concentration and the timing of its administration. At low concentration, the UPP displayed radioprotective effects in γ-irradiated human lymphocytes while at higher concentrations, it acted as a radiosensitiser enhancing either mitotic catastrophe or apoptosis depending on the treatment regimen. The UPP modified redox processes in cells, particularly when it was employed prior to γ-irradiation. Our data highlight the importance of further research of the potential of UPP to sensitize tumour cells to radiation therapy by inhibiting pathways that lead to treatment resistance.

Published
2017-01-17
How to Cite
PETROVIĆ, Sandra et al. The impact of concentration and administration time on the radiomodulating properties of undecylprodigiosin in vitro. Archives of Industrial Hygiene and Toxicology, [S.l.], v. 68, n. 1, jan. 2017. ISSN 1848-6312. Available at: <https://arhiv.imi.hr/index.php/arhiv/article/view/656>. Date accessed: 23 june 2017. doi: https://doi.org/10.1515/aiht-2017-68-2897.
Section
Original article

Keywords

apoptosis; mitotic catastrophe; oxidative stress; radiosensitisation; undecylprodigiosin