Pyrene-Assisted Efficient Photolysis of Disulfide Bonds in DNA-Based Molecular Engineering


YOU M., ZHU Z., LIU H., Gulbakan B. , HAN D., WANG R., ...More

ACS APPLIED MATERIALS & INTERFACES, vol.2, no.12, pp.3601-3605, 2010 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 2 Issue: 12
  • Publication Date: 2010
  • Doi Number: 10.1021/am1007886
  • Title of Journal : ACS APPLIED MATERIALS & INTERFACES
  • Page Numbers: pp.3601-3605

Abstract

An efficient pyrene-assisted method has been developed for the photolysis of disulfide bonds, with 77% of disulfides cleaved after only 20 min of irradiation (0.3W) at 350 nm. By employing a DNA framework, it was possible to observe both a distance-dependent cleavage pathway and a radical-forming photoreaction mechanism. To demonstrate the biomedical applications of such pyrene disulfide molecular assemblies, a DNA micelle structure and DNAzyme analog were further studied. Rapid photodriven disassembly of DNA micelles was achieved, allowing the further design of controlled pharmaceutical release at the target region and at a specific time. The DNAzyme analog can carry out multiple turnover reactions that follow the Michaells-Menten equation, with a k(cat) of 10.2 min(-1) and a K-M of 46.3 mu M (0.3W 350 nm light source), comparable to that of common DNAzymes, e.g., 8-17 DNAzyme.