Antisense oligonucleotides with 2'-O-{2-[N,N-dimethyl)aminooxy]ethyl} or (2
'-O-DMAOE) modification were synthesized and evaluated for nuclease resista
nce and pharmacology both in vitro and in vivo. This modification exhibits
very high nuclease resistance and efficacy in various biological (ICAM-1, C
-raf and PKC-alpha) targets.