| abstract |
Disclosed are double-stranded antisense nucleic acid complexes that can efficiently alter the processing of RNA in a cell via an antisense effect, and methods for using the same. One method comprises contacting with the cell a double-stranded nucleic acid complex comprising: a first nucleic acid strand annealed to a second nucleic acid strand, wherein: the first nucleic acid strand comprises (i) nucleotides independently selected from natural DNA nucleotides, modified DNA nucleotides, and nucleotide analogs, (ii) no regions that have 4 or more consecutive natural DNA nucleotides, (iii) the total number of natural DNA nucleotides, modified DNA nucleotides, and nucleotide analogs in the first nucleic acid strand is from 8 to 100, and (iv) the first nucleic acid strand is capable of hybridizing to RNA inside of the cell; and the second nucleic acid strand comprises nucleotides independently selected from natural RNA nucleotides, modified RNA nucleotides, and nucleotide analogs. |