Novel Water-Soluble 4,4-Disubstituted Ruthenium(III)-Salen Complexes in DNA Stranded Scission
摘要:
AbstractSalen‐type Ru(III) complexes are found to be capable of reacting with physiologically acceptable oxidants. The water solubility and DNA affinity of these Ru(III)‐salen complexes are enhanced by the utilization of a variety of charged groups through the formation of peptide bonds. In the presence of hydrogen peroxide, modified Ru(III)‐salen complexes are capable of nicking DNA. In addition, the reactivity in DNA cleavage increases along with the total number of positive charges retaining in Ru(III)‐salen complexes and less influence in the electronic effect. Using 32P‐end‐labeled oligonucleotides and high resolution polyacrylamide gel electrophoresis, Ru(III)‐salen complexes are found to randomly cleave DNA regardless of the DNA secondary conformation such as bulge, inter‐loop, or double‐stranded regions. The possible reactive species of Ru(III)‐salen complexes in DNA cleavage is considered as the hydroxyl radical and high valent oxoruthenium(IV) species according to the UV titration, quenching studies, and reaction with varied oxidants.
Novel Water-Soluble 4,4-Disubstituted Ruthenium(III)-Salen Complexes in DNA Stranded Scission
摘要:
AbstractSalen‐type Ru(III) complexes are found to be capable of reacting with physiologically acceptable oxidants. The water solubility and DNA affinity of these Ru(III)‐salen complexes are enhanced by the utilization of a variety of charged groups through the formation of peptide bonds. In the presence of hydrogen peroxide, modified Ru(III)‐salen complexes are capable of nicking DNA. In addition, the reactivity in DNA cleavage increases along with the total number of positive charges retaining in Ru(III)‐salen complexes and less influence in the electronic effect. Using 32P‐end‐labeled oligonucleotides and high resolution polyacrylamide gel electrophoresis, Ru(III)‐salen complexes are found to randomly cleave DNA regardless of the DNA secondary conformation such as bulge, inter‐loop, or double‐stranded regions. The possible reactive species of Ru(III)‐salen complexes in DNA cleavage is considered as the hydroxyl radical and high valent oxoruthenium(IV) species according to the UV titration, quenching studies, and reaction with varied oxidants.