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Cited by 623

The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.

Structural variations and stabilising modifications of synthetic siRNAs in mammalian cells

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Czauderna, F.·2003·Nucleic Acids Research

Abstract

Double-stranded short interfering RNAs (siRNA) induce post-transcriptional silencing in a variety of biological systems. In the present study we have investigated the structural requirements of chemically synthesised siRNAs to mediate efficient gene silencing in mammalian cells. In contrast to studies with Drosophila extracts, we found that synthetic, double-stranded siRNAs without specific nucleotide overhangs are highly efficient in gene silencing. Blocking of the 5'-hydroxyl terminus of the antisense strand leads to a dramatic loss of RNA interference activity, whereas blocking of the 3' terminus or blocking of the termini of the sense strand had no negative effect. We further demonstrate that synthetic siRNA molecules with internal 2'-O-methyl modification, but not molecules with terminal modifications, are protected against serum-derived nucleases. Finally, we analysed different sets of siRNA molecules with various 2'-O-methyl modifications for stability and activity. We demonstrate that 2'-O-methyl modifications at specific positions in the molecule improve stability of siRNAs in serum and are tolerated without significant loss of RNA interference activity. These second generation siRNAs will be better suited for potential therapeutic application of synthetic siRNAs in vivo.

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Metadata

Authors
Czauderna, F.
Venue
Nucleic Acids Research
Published
2003-06-01
Volume
31
Issue
11
Pages
2705-2716
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W1984085632
Cited by
623
References
28
FWCI
9.76
Type
journal article
Language
en
Open access
bronze

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Czauderna, F. (2003). Structural variations and stabilising modifications of synthetic siRNAs in mammalian cells. Nucleic Acids Research. https://doi.org/10.1093/nar/gkg393

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