1085412-36-7Relevant articles and documents
Controlled-folding of a small molecule modulates DNA G-quadruplex recognition
Mueller, Sebastian,Pantos, G. Dan,Rodriguez, Raphael,Balasubramanian, Shankar
, p. 80 - 82 (2009)
Differential recognition of diverse G-quadruplex structures can be achieved by controlling the folding of a small molecule. The Royal Society of Chemistry.
Reprogramming the mechanism of action of chlorambucil by coupling to a G-quadruplex ligand
Di Antonio, Marco,McLuckie, Keith I. E.,Balasubramanian, Shankar
supporting information, p. 5860 - 5863 (2014/05/20)
The nitrogen mustard Chlorambucil (Chl) generates covalent adducts with double-helical DNA and inhibits cell proliferation. Among these adducts, interstrand cross-links (ICLs) are the most toxic, as they stall replication by generating DNA double strand breaks (DSBs). Conversely, intrastrand cross-links generated by Chl are efficiently repaired by a dedicated Nucleotide Excision Repair (NER) enzyme. We synthesized a novel cross-linking agent that combines Chl with the G-quadruplex (G4) ligand PDS (PDS-Chl). We demonstrated that PDS-Chl alkylates G4 structures at low μM concentrations, without reactivity toward double- or single-stranded DNA. Since intramolecular G4s arise from a single DNA strand, we reasoned that preferential alkylation of such structures might prevent the generation of ICLs, while favoring intrastrand cross-links. We observed that PDS-Chl selectively impairs growth in cells genetically deficient in NER, but did not show any sensitivity to the repair gene BRCA2, involved in double-stranded break repair. Our findings suggest that G4 targeting of this clinically important alkylating agent alters the overall mechanism of action. These insights may inspire new opportunities for intervention in diseases specifically characterized by genetic impairment of NER, such as skin and testicular cancers.
Pyridostatin analogues promote telomere dysfunction and long-term growth inhibition in human cancer cells
Müller, Sebastian,Sanders, Deborah A.,Di Antonio, Marco,Matsis, Stephanos,Riou, Jean-Fran?ois,Rodriguez, Rapha?l,Balasubramanian, Shankar
supporting information; experimental part, p. 6537 - 6546 (2012/09/08)
The synthesis, biophysical and biological evaluation of a series of G-quadruplex interacting small molecules based on a N,N′-bis(quinolinyl) pyridine-2,6-dicarboxamide scaffold is described. The synthetic analogues were evaluated for their ability to stabilize telomeric G-quadruplex DNA, some of which showed very high stabilization potential associated with high selectivity over double-stranded DNA. The compounds exhibited growth arrest of cancer cells with detectable selectivity over normal cells. Long-time growth arrest was accompanied by senescence, where telomeric dysfunction is a predominant mechanism together with the accumulation of restricted DNA damage sites in the genome. Our data emphasize the potential of a senescence-mediated anticancer therapy through the use of G-quadruplex targeting small molecules based on the molecular framework of pyridostatin.