Site-specific DNA cleavage by antisense oligonucleotides covalently linked to phenazine Di-N-oxide

Katsuyuki Nagai, Sidney Hecht

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Site-specific degradation of DNA was achieved by the use of DNA oligonucleotides covalently tethered to phenazine 5,10-di-N-oxide. When annealed to a complementary DNA target strand, the antisense oligonucleotide effected alkylation of guanosine residues in proximity to the phenazine di-N-oxide prosthetic group. Admixture of dithiothreitol to the formed duplex resulted in reductive activation of the phenazine di-N-oxide moiety with concomitant generation of diffusible oxygen radicals; the latter effected strand scission of the target DNA oligonucleotide. Several parameters of DNA degradation were studied, including the effect on DNA degradation of chain length in the tether connecting the oligonucleotides and prosthetic group, the relative efficiencies of DNA cleavage when the prosthetic group was in the middle or at the end of the antisense oligonucleotide, and the effect of O2 on DNA degradation. Also studied was the actual chemistry of DNA oligonucleotide degradation and the ability of individual diastereomers of the modified oligonucleotides to mediate degradation of the target DNA.

Original languageEnglish (US)
Pages (from-to)23994-24002
Number of pages9
JournalJournal of Biological Chemistry
Volume266
Issue number35
StatePublished - Dec 15 1991
Externally publishedYes

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DNA Cleavage
Antisense Oligonucleotides
Oligonucleotides
DNA
Degradation
Prosthetics
phenazine di-N-oxide
Guanosine
Dithiothreitol
Alkylation
Oxides
Chain length
Reactive Oxygen Species
Complementary DNA
Chemical activation

ASJC Scopus subject areas

  • Biochemistry

Cite this

Site-specific DNA cleavage by antisense oligonucleotides covalently linked to phenazine Di-N-oxide. / Nagai, Katsuyuki; Hecht, Sidney.

In: Journal of Biological Chemistry, Vol. 266, No. 35, 15.12.1991, p. 23994-24002.

Research output: Contribution to journalArticle

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