The interaction between resveratrol(Res) and peroxynitrite(ONOO
-
) were explored by UV-Vis and Fluorescence spectroscopy.The ability of Res to protect the peroxynitrite-mediated DNA damage was tested by agarose gel electrophoresis analysis.The results show that Res can react with peroxynitrite and significantly inhibits the peroxynitrite induced DNA damage.At the 0.05 mmol/L Res concentration used
approximately 50% of the DNA was recovered in the supwrcoiled form after exposure to peroxynitrite.CO
2
can decrease the DNA damage induced by peroxynitrite and enhance Res protection.The ability of Res protection is increased from 50% to 71%.