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© Research
Publication : Biochimie

Selective mRNA degradation by antisense oligonucleotide-2,5A chimeras: Involvement of RNase H and RNase L

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Biochimie - 09 Jul 1998

Biochimie

Link to Pubmed [PMID] – 9865493

Biochimie, 1998; 80(8–9):711–720

Antisense oligonucleotides (ON) allow the specific control of gene expression and phosphorothioate derivatives are currently being evaluated for possible clinical applications. Numerous second generation ON analogues with improved pharmacological properties have been described. Most of them, however, do not recruit RNase H, which is known to increase ON potency by eliciting the specific degradation of the target RNA. Silverman, Torrence and colleagues, have conjugated 2.5 A to natural antisense ON and demonstrated the preferential cleavage of a target RNA in cell-free and intact cell experiments. We have established for the first time that RNase H-incompetent ON, viz, α-anomeric ON analogues, can be converted into sequence-specific nucleases upon conjugation to 2,5 A. The use of α-ON and β-ON-2,5 A chimeras has allowed us to delineate the part played by RNase H and RNase L in target RNA degradation and translation arrest. Finally, the present studies have revealed limitations which are encountered in the choice of a suitable target for such ON-2,5 A chimeras.

http://dx.doi.org/10.1016/S0300-9084(99)80024-8