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Nucleic Acids Research, 2001, Vol. 29, No. 6 1293-1299
© 2001 Oxford University Press

Fully modified 2' MOE oligonucleotides redirect polyadenylation

Timothy A. Vickers*, Jacqueline R. Wyatt, Todd Burckin, C. Frank Bennett and Susan M. Freier

Isis Pharmaceuticals, Department of Molecular and Structural Biology, 2280 Faraday Avenue, Carlsbad, CA 92008, USA

Many genes have been described and characterized that have alternative polyadenylation signals at the 3'-end of their pre-mRNAs. Many of these same messages also contain destabilization motifs responsible for rapid degradation of the mRNA. Polyadenylation site selection can thus determine the stability of an mRNA. Fully modified 2'-O-methoxy ethyl/phosphorothioate oligonucleotides that hybridize to the 3'-most polyadenylation site or signal of E-selectin were able to inhibit polyadenylation at this site and redirect it to one of two upstream cryptic sites. The shorter transcripts produced after antisense treatment have fewer destabilization sequences, increased mRNA stability and altered protein expression. This study demonstrates that antisense oligonucleotides can be successfully employed to redirect polyadenylation. This is the first demonstration of the use of oligonucleotides to increase, rather than decrease, abundance of a message.

* To whom correspondence should be addressed. Tel: +1 760 603 2367; Fax: +1 760 931 0209; Email: tvickers{at}isisph.com


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