Methods for detecting rna analytes using modified probes

Details Methods for detecting rna analytes using modified probes Methods for detecting rna analytes using modified probes

C - Chemistry, Metallurgy

12

Q

C12Q 1/68 (2006.01) C07H 21/00 (2006.01) C12P 19/34 (2006.01)

Patent

CA 2260749

The present invention concerns oligonucleotides containing one or more modified nucleotides which increase the binding affinity of the oligonucleotides to target nucleic acids having a complementary nucleotide base sequence. These modified oligonucleotides hybridize to the target sequence at a faster rate than unmodified oligonucleotides having an identical nucleotide base sequence. Such modified oligonucleotides include oligonucleotides containing at least one 2'-O-methylribofuranosyl moiety joined to a nitrogenous base. Oligonucleotides can be modified in accordance with the present invention to preferentially bind RNA targets. The present invention also concerns methods of using these modified oligonucleotides and kits containing the same.

La présente invention concerne des oligonucléotides contenant un ou plusieurs nucléotides qui augmentent l'affinité de liaison des oligonucléotides avec des acides nucléiques cibles ayant une séquence de bases nucléotidiques complémentaire. Ces oligonucléotides modifiés s'hybrident avec la séquence cible plus rapidement que ne le font les oligonucléotides non modifiés ayant une séquence de bases nucléotidiques identique. De tels oliognucléotides modifiés comprennent des oligonucléotides contenant au minimum une fraction de 2'-O-méthylribofuranosyle fixée sur une base azotée. Des oligonucléotides peuvent être modifiés, selon l'invention, pour fixer de préférence des cibles ARN. La présente invention concerne aussi des procédés d'utilisation desdits oligonucléotides modifiés et des kits contenant lesdits oligonucléotides.

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