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- W1988473081 abstract "Thiol and aminothiol compounds are among the most efficient chemical radioprotectors. To increase their efficiency, we synthesized two new classes of thiol and aminothiol compounds derived from benzothiazole (T1, T2, AM1, AM2) and thiadiazole (T3, T4, AM3) structures. We examined them for their ability to scavenge free radicals (DPPH·, ABTS·+, ·OH). Thiol derivatives with a thiadiazole structure are the most active compounds scavenging DPPH· and ABTS·+ free radicals, with an IC50 of 0.053 ± 0.006 and 0.023 ± 0.002 mM, respectively, for the derivative T3. Moreover, compounds T1, T2, and T3 at 60 μM gave 83% protection against 2-deoxyribose degradation by ·OH. The ability of these compounds to protect DNA against ·OH produced by a Fenton reaction and γ-irradiation (15 Gy)-induced strand breaks was also evaluated on pBR322 plasmid DNA. In both tests thiol derivatives were the most efficient compounds. Derivatives T2 and T3 totally inhibit DNA strand breaks at the concentration of 50 μM. The protection afforded by these derivatives was comparatively higher than that of the radioprotectors WR-2721 and WR-1065. Our data indicate that these two compounds are free radical scavengers and potential antioxidant agents. Finally, DFT and QSAR studies were performed to support the experimental observations." @default.
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- W1988473081 date "2009-04-01" @default.
- W1988473081 modified "2023-10-18" @default.
- W1988473081 title "Evaluation of new thiadiazoles and benzothiazoles as potential radioprotectors: Free radical scavenging activity in vitro and theoretical studies (QSAR, DFT)" @default.
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- W1988473081 doi "https://doi.org/10.1016/j.freeradbiomed.2009.01.016" @default.
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