Abstract
The objective of our study was to assess the radioprotective effect of flavonoids extracted from Rosa roxburghii Tratt (FRT) and investigate the role of Bcl-2(Ca2+)/Caspase-3/PARP-1 pathway in radiation-induced apoptosis. Cells and mice were exposed to 60Co γ-rays at a dose of 6 Gy. The radiation treatment induced significant effects on tissue pathological changes, apoptosis, Ca2+, ROS, DNA damage, and expression levels of Bcl-2, Caspase-3 (C-Caspase-3), and PARP-1. The results showed that FRT acted as an antioxidant, reduced DNA damage, corrected the pathological changes of the tissue induced by radiation, promoted the formation of spleen nodules, resisted sperm aberration, and protected the thymus. FRT significantly reduced cell apoptosis compared with the irradiation group. The expression of Ca2+ and C-Caspase-3 was decreased after FRT treatment compared with the radiation-treated group. At the same time, expression of prototype PARP-1 and Bcl-2 increased, leading to a decrease in the percentage of apoptosis cells in FRT treatment groups. We conclude that FRT acts as a radioprotector. Apoptosis signals were activated via the Bcl-2(Ca2+)/Caspase-3/PARP-1 pathway in irradiated cells and FRT inhibited this pathway of apoptosis by down-regulation of C-Caspase-3 and Ca2+ and up-regulation of prototype PARP-1 and Bcl-2.
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Acknowledgments
We sincerely thank Dr. Bin-Feng Cheng for the excellent computer-aided drug design assistance and guidance, with a special thank you to Colin Fearon. This study was supported by the Department of Science and Technology Research Project of Henan Province in China (142102310302), the Department of Education Science and Technology Research Project of Henan Province in China (12B310018), and the National Science Foundation of China (U1504824).
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We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature in any product, service or company that could be construed as influencing the position presented in the manuscript entitled “Flavonoids of Rosa roxburghii Tratt exhibit radioprotection and anti-apoptosis properties via the Bcl-2(Ca2+)/Caspase-3/PARP-1 pathway”.
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Xu, P., Cai, X., Zhang, W. et al. Flavonoids of Rosa roxburghii Tratt exhibit radioprotection and anti-apoptosis properties via the Bcl-2(Ca2+)/Caspase-3/PARP-1 pathway. Apoptosis 21, 1125–1143 (2016). https://doi.org/10.1007/s10495-016-1270-1
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DOI: https://doi.org/10.1007/s10495-016-1270-1