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- W2400493948 abstract "The radiation-induced biological behavior of adenine (vitamin B4) was investigated in vitro under various conditions, implementing breast cancer cells (MCF-7 line) as a model. In aerated media (46% OH and 54% O2*-) at pH=7.4, adenine at low concentration (2 micromol) acted as an efficient radiation-protecting agent. At higher concentration, however, it inhibited cytostatic properties with regard to cancer cells. This double-track activity is based on its chemical structure. Similar features of adenine were also observed in air-free (46% OH, 44% e- aq, 10% H) as well as in media saturated with N2O (90% OH, 10% H), but with different efficiencies. In the presence of mitomycin C (MMC), adenine retained its double-track behavior. Hence, adenine and MMC compete for the e- aq, but the electronically excited adenine molecules can transfer electrons to MMC, leading to the additional formation of active MMC-. By implementation of formate for the conversion of OH and H into the transient *COO-, which subsequently transfers electron to MMC, a highest efficiency of MMC- was obtained." @default.
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- W2400493948 date "2006-08-05" @default.
- W2400493948 modified "2023-09-30" @default.
- W2400493948 title "Radiation-induced effect of adenine (vitamin B4) on mitomycin C activity. In vitro experiments." @default.
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