A red-light triggered G-quadruplex photoalkylation procedure is reported, based on a bi-molecular approach involving the irradiation of a G4-binding photosensitizer in presence of a furan-containing G4-ligand.
Unraveling the relationship between structure and stabilization of triarylpyridines as G-quadruplex binding ligands
作者:N. M. Smith、Gaëlle Labrunie、Ben Corry、Phong Lan Thao Tran、Marck Norret、Mojgan Djavaheri-Mergny、Colin L. Raston、Jean-Louis Mergny
DOI:10.1039/c1ob05560g
日期:——
A series of novel 2,4,6-triarylpyridines have been synthesized and their interactions with intramolecular G-quadruplexes have been measured by Förster Resonance Energy Transfer (FRET) melting and Fluorescent Intercalator Displacement (FID) assays. A few of these compounds exhibit stabilization of G4-DNA that is comparable to other benchmark G4-DNA ligands with fair to excellent G4-DNA vs. duplex selectivity and significant cytotoxicity towards HeLa cells. The nature of the 4-aryl substituents along with side chain length governs the G4-DNA stabilization ability of the compounds. In addition, we demonstrate that there is a strong correlation between the ability of the compounds to stabilize the same G4-DNA sequence in K+ and Na+ conditions and a strong correlation between the ability of the compounds to stabilize different G4-DNA sequences in K+ or Na+ buffer.