Ruthenium-caged antisense morpholinos for regulating gene expression in zebrafish embryos
|
| |
| Authors: | Julianne C. Griepenburg Teresa L. Rapp Patrick J. Carroll James Eberwine Ivan J. Dmochowski |
| |
| Affiliation: | a Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , USA . Email: ; b Department of Systems Pharmacology and Experimental Therapeutics , Perelman School of Medicine , University of Pennsylvania , 37 John Morgan Building, 3620 Hamilton Walk , Philadelphia , Pennsylvania 19104 , USA |
| |
| Abstract: | ![]()
Photochemical approaches afford high spatiotemporal control over molecular structure and function, for broad applications in materials and biological science. Here, we present the first example of a visible light responsive ruthenium-based photolinker, Ru(bipyridine)2(3-ethynylpyridine)2 (RuBEP), which was reacted stoichiometrically with a 25mer DNA or morpholino (MO) oligonucleotide functionalized with 3′ and 5′ terminal azides, via Cu(i)-mediated [3+2] Huisgen cycloaddition reactions. RuBEP-caged circular morpholinos (Ru-MOs) targeting two early developmental zebrafish genes, chordin and notail, were synthesized and tested in vivo. One-cell-stage zebrafish embryos microinjected with Ru-MO and incubated in the dark for 24 h developed normally, consistent with caging, whereas irradiation at 450 nm dissociated one 3-ethynylpyridine ligand (Φ = 0.33) and uncaged the MO to achieve gene knockdown. As demonstrated, Ru photolinkers provide a versatile method for controlling structure and function of biopolymers. |
| |
| Keywords: | |
|
|
