Cyclohexenyl nucleic acids analogs
The present disclosure describes cyclohexenyl nucleic acid analogs, oligomeric compounds prepared therefrom and methods of using the oligomeric compounds. More particularly, cyclo-hexenyl nucleic acid analogs are provided, having one or more chiral substituents, that are expected to be useful for enhancing properties of oligomeric compounds including nuclease resistance and binding affinity. In some embodiments, the oligomeric compounds provided herein hybridize to a portion of a target RNA resulting in loss of normal function of the target RNA.
1. An oligomeric compound comprising at least one cyclohexenyl nucleic acid analog having Formula III:
wherein independently for each cyclohexenyl nucleic acid analog having Formula III:
Bx is adenine, guanine, thymine, cytosine, 5-methylcytosine or uracil;
X is fluoro;
T 3 and T 4 are each, independently, hydroxyl, a protected hydroxyl, a linked conjugate group or an internucleoside linking group attaching the cyclohexenyl nucleic acid analog to the oligomeric compound wherein at least one of T 3 and T 4 is an internucleoside linking group attaching the cyclohexenyl nucleic acid analog to the oligomeric compound;
q 1 , q 2 , q 3 and q 4 are each H; and
j 1 , j 2 , j 3 and j 4 are each H.
2. The oligomeric compound of claim 1 wherein each cyclohexenyl nucleic acid analog has Formula IV:
wherein:
each Bx is, independently, adenine, guanine, thymine, cytosine, 5-methylcytosine or uracil; and
T 3 and T 4 are each, independently, hydroxyl, a protected hydroxyl, a linked conjugate group or an internucleoside linking group attaching the cyclohexenyl nucleic acid analog to the oligomeric compound wherein at least one of T 3 and T 4 is an internucleoside linking group attaching the cyclohexenyl nucleic acid analog to the oligomeric compound.
3. The oligomeric compound of claim 1 wherein each internucleoside linking group is, independently, selected from phosphodiester and phosphorothioate.
4. The oligomeric compound of claim 1 wherein each internucleoside linking group is a phosphorothioate.
5. The oligomeric compound of claim 1 comprising at least one region having at least 2 contiguous cyclohexenyl nucleic acid analogs having Formula III.
6. The oligomeric compound of claim 1 comprising at least two regions wherein each region independently comprises from 1 to about 5 contiguous cyclohexenyl nucleic acid analogs having Formula III and wherein the two regions are separated by an internal region comprising from about 6 to about 18 monomer subunits wherein each monomer subunit is, independently, a nucleoside or a modified nucleoside.
7. The oligomeric compound of claim 6 wherein said internal region comprises from about 9 to about 12 contiguous β-D-2′-deoxyribofuranosyl nucleosides.
8. The oligomeric compound of claim 1 comprising from about 8 to about 40 monomer subunits.
9. A method of inhibiting gene expression comprising contacting one or more cells, a tissue or an animal with an oligomeric compound of claim 1 wherein said oligomeric compound is complementary to a target RNA.
10. The method of claim 9 wherein said cells are in a human.
11. The method of claim 9 wherein said target RNA is selected from mRNA, pre-mRNA and micro RNA.
12. The method of claim 11 wherein said target RNA is mRNA.
13. The method of claim 11 wherein said target RNA is human mRNA.
14. The method of claim 9 wherein said target RNA is cleaved thereby inhibiting its function.
15. The method of claim 9 further comprising detecting the levels of target RNA.