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International Journal of Biological Macromolecules 2017-Jan

Polyphenolic glycoconjugates from medical plants of Rosaceae/Asteraceae family protect human lymphocytes against γ-radiation-induced damage.

Només els usuaris registrats poden traduir articles
Inicieu sessió / registreu-vos
L'enllaç es desa al porta-retalls
Magdalena Szejk
Tomasz Poplawski
Joanna Sarnik
Izabela Pawlaczyk-Graja
Franciszek Czechowski
Alicja Klaudia Olejnik
Roman Gancarz
Halina Malgorzata Zbikowska

Paraules clau

Resum

Radioprotective effects of the water-soluble polyphenolic glycoconjugates, isolated from flowers of Sanguisorba officinalis L.(SO) and Erigeron canadensis L.(EC), and from leaves of Fragaria vesca L. (FV) and Rubus plicatus Whe. Et N. E. (RP), against γ-radiation-induced toxicity in human peripheral blood lymphocytes were investigated. Cell treatment with glycoconjugates (1, 5 and 25μg/mL) prior exposure to 10/15Gy radiation resulted in concentration-dependent reduction of DNA damage including oxidative DNA lesions (comet assay), substantial inhibition of lipid peroxidation (TBARS) and restoration of superoxide dismutase and S-glutathione transferase activities. Glycoconjugates isolated from SO and EC ensured better protection versus these from RP and FV, with the SO product potential comparable to that of the reference quercetin. Strong antioxidant/radioprotective activity of the SO and EC glycoconjugates could be attributed to high abundance of syringol-type and ferulic acid units in their matrices, respectively. Moreover, polyphenolic glycoconjugates (25μg/mL), including RP and FV products, significantly decreased DNA damage when applied post-radiation suggesting their modulating effects on DNA repair pathways. Preliminary data on the glycoconjugate phenolic structural units, based on GLC/MS of the products of pyrolysis and in situ methylation, in relation to application of plant products as potential radioprotectors is promising and deserves further investigation.

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