Modification of oligonucleotides with weak basic residues via the 2′-O-carbamoylethyl linker for improving nuclease resistance without loss of duplex stability and antisense activity
Literature Information
Yoshiaki Masaki, Keishi Yamamoto, Keita Yoshida, Atsuya Maruyama, Takahito Tomori, Yusuke Iriyama, Hiroyuki Nakajima, Tatsuro Kanaki, Kohji Seio
For the improvement of nuclease resistance, four kinds of new modifications through a carbamoylethyl linker were designed. Among them, the 2′-O-[2-N-{2-(benzimidazol-1-yl)ethyl}carbamoylethyl] modification showed 20-fold longer half-life when treated with a 3′ to 5′ exonuclease compared to the 2′-O-methoxyethyl (MOE) modification, which is used in approved drugs. In addition, this large modification did not disturb the binding affinity or RNase H-dependent antisense activity. From these findings, it could be concluded that an adequate linker, such as carbamoylethyl in this study, could extend the utility of 2′-O-modification without loss of the properties of nucleic acids. This strategy would be useful for the development of nucleic acid therapeutics.
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Organic & Biomolecular Chemistry

Organic & Biomolecular Chemistry (OBC) publishes original and high impact research and reviews in organic chemistry. We welcome research that shows new or significantly improved protocols or methodologies in total synthesis, synthetic methodology or physical and theoretical organic chemistry as well as research that shows a significant advance in the organic chemistry or molecular design aspects of chemical biology, catalysis, supramolecular and macromolecular chemistry, theoretical chemistry, mechanism-oriented physical organic chemistry, medicinal chemistry or natural products. Articles published in the journal should report new work which makes a highly-significant impact in the field. Routine and incremental work is generally not suitable for publication in the journal. More details about key areas of our scope are below. In all cases authors should include in their article clear rationale for why their research has been carried out.




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