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Abstract
The sequence-specificity of antisense oligonucleotides (ODN) against c-myc mRNA was tested by Northern blot analysis. Rat smooth muscle cells were treated with antisense or control ODN against c-myc modified by the “minimal protection strategy”. At 0.3 μM concentration the ODN show a very specific reduction in c-myc mRNA levels. Use of the “minimal protection strategy” minimizes nonspecific effects as observed for all-phosphorothioate ODN containing four consecutive guanine residues.