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  • Title: Selenium-containing compounds protect DNA from single-strand breaks caused by peroxynitrite.
    Author: Roussyn I, Briviba K, Masumoto H, Sies H.
    Journal: Arch Biochem Biophys; 1996 Jun 01; 330(1):216-8. PubMed ID: 8651699.
    Abstract:
    Peroxynitrite (ONOO-/ONOOH) is a powerful oxidant that can induce mutations and cause single-strand breaks in plasmid supercoiled DNA. The selenium-containing compound ebselen rapidly reacts with peroxynitrite. Therefore, ebselen [2-phenyl-1,2-benzisoselenazol-3(2H)-one] and other selenium-containing molecules, selenomethionine and selenocystine, were studied as agents protecting DNA from single-strand breaks induced by peroxynitrite. Selenomethionine and selenocystine protected DNA from single-strand breaks more effectively than their sulfur analogs, methionine and cystine, and they also were more effective than glutathione or the hydroxyl radical scavenger mannitol. These results suggest that selenium-containing compounds can protect DNA from damage caused by peroxynitrite.
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