Photoactivated cationic alkyl-substituted porphyrin binding to g4-RNA in the 5'-UTR of KRAS oncogene represses translation
Overview of Faudale M et al.
| Authors | Faudale M Cogoi S Xodo LE |
|---|---|
| Affiliation | Department of Medical and Biological Science University of Udine 33100 Udine Italy. |
| Journal | Chem Commun (Camb) |
| Year | 2011 |
Abstract
The KRAS transcript is characterized by a 192-nt 5'-UTR containing repetitive runs of two-guanines which can fold in several G-quadruplexes. These folded structures have a high affinity for the cationic porphyrin tri-meso(N-methyl-4-pyridyl), meso(N-tetradecyl-4-pyridyl) porphine (TMPyP4-C14), which efficiently penetrates cell membranes. Upon photoactivation TMPyP4-C14 induces a dramatic down-regulation of oncogenic KRAS and cell growth arrest in pancreatic cancer cells.