Abstract
The radioprotective effect of geraniin, a tannin compound isolated from Nymphaea tetragona Georgi var. (Nymphaeaceae), against γ-radiation-induced damage was investigated in Chinese hamster lung fibroblast (V79-4) cells. Geraniin recovered cell viability detected by MTT test and colony formation assay, which was compromised by γ-radiation, and reduced the γ-radiation-induced apoptosis by the inhibition of loss of the mitochondrial membrane potential. Geraniin protected cellular components (lipid membrane, cellular protein, and DNA) damaged by γ-radiation, which was detected by lipid peroxidation, protein carbonyl formation, and comet assay. Geraniin significantly reduced the level of intracellular reactive oxygen species generated by γ-radiation, which was detected using spectrofluorometer, flow cytometer, and confocal microscope after 2′,7′-dichlorodihydrofluorescein diacetate staining. Geraniin normalized the superoxide dismutase and catalase activities, which were decreased by γ-radiation. These results suggest that geraniin protects cells against radiation-induced oxidative stress via enhancing of antioxidant enzyme activities and attenuating of cellular damage.
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This study was performed under the program of Basic Atomic Energy Research Institute (BAERI), which is a part of the Nuclear R&D Programs funded by the Ministry of Science & Technology (MOST) of Korea.
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Kyoung Ah Kang and In Kyung Lee contributed equally to this study.
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Kang, K.A., Lee, I.K., Zhang, R. et al. Radioprotective effect of geraniin via the inhibition of apoptosis triggered by γ-radiation-induced oxidative stress. Cell Biol Toxicol 27, 83–94 (2011). https://doi.org/10.1007/s10565-010-9172-4
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DOI: https://doi.org/10.1007/s10565-010-9172-4