Oligonucleotides targeting prion diseases

• US 20070123480A1
• Filed: 09/10/2004
• Published: 05/31/2007
• Est. Priority Date: 09/11/2003
• Status: Abandoned Application

• Current Assignee: Replicor Inc.
• Original Assignee: Replicor Inc.
• Inventors: Juteau, Jean-Marc, Vaillant, Andrew
• Application Number:
  US10/571,172
• Publication Number:
  US 20070123480A1
• Time in Patent Office: Days
• US Class Current: 514/44.A
• CPC Class Codes: A61K 31/7088 Compounds having three or more nucleosides or nucleotides
• CPC Class Codes: A61P 25/00 Drugs for disorders of the nervous system
• CPC Class Codes: A61P 31/00 Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
• CPC Class Codes: A61P 31/12 Antivirals
• CPC Class Codes: C12N 15/115 Aptamers, i.e. nucleic acids binding a target molecule specifically and with high affinity without hybridising therewith ; Nucleic acids binding to non-nucleic acids, e.g. aptamers
• CPC Class Codes: C12N 2310/16 Aptamers
• CPC Class Codes: C12N 2310/315 Phosphorothioates
• CPC Class Codes: C12N 2310/321 2'-O-R Modification
• CPC Class Codes: C12N 2310/346 having a combination of backbone and sugar modifications
• CPC Class Codes: C12N 2310/3521 Methyl

Abstract

Randomer phosphorothioate oligonucleotide compositions have been described that inhibit PrPc conversion to PrPcs with a high level of potency. Pharmaceutical compositions or kits containing such compounds, and methods of using such compounds in the treatment, control, or prevention of prion diseases are also described.

Claims

1. A method for the prophylaxis or treatment of a prion disease in a subject, comprising administering to a subject in need of such treatment a therapeutically effective amount of at least one pharmacologically acceptable oligonucleotide, wherein said oligonucleotide provides anti-prion activity.

2. The method of claim 1, wherein the anti-prion activity of said oligonucleotide occurs principally by a sequence independent mode of action.

3. The method of claim 1, wherein said at least one oligonucleotide comprises a mixture of at least two anti-prion randomers of different lengths.

4. The method of claim 1, wherein said oligonucleotide is at least 6 nucleotides in length and the sequence of said oligonucleotide is not complementary to any portion of a genomic sequence of said subject.

5. The method of claim 1, wherein said oligonucleotide is at least 6 nucleotides in length and the sequence of said oligonucleotide is complementary to a portion of a genomic sequence of said subject.

6. The method of claim 1, wherein said oligonucleotide is at least 6 nucleotides in length and at least a portion of the sequence of said oligonucleotide is complementary to a portion of a PrP gene.

7. The method of claim 1, wherein said oligonucleotide has an IC₅₀ for a prion of 1.0, μ

M or less.

8. The method of claim 1, wherein said oligonucleotide has an IC₅₀ for a prion of 0.1, μ

M or less.

9. The method of claim 1, wherein said oligonucleotide has an IC50 for a prion of 0.05 μ

M or less.

10. The method of claim 1, wherein said oligonucleotide has an IC50 for a prion of 0.01, μ

M or less.

11. The method of claim 1, wherein said oligonucleotide is at least 6 nucleotides in length.

12. The method of claim 1, wherein said oligonucleotide is at least 10 nucleotides in length.

13. The method of claim 1, wherein said oligonucleotide is at least 20 nucleotides in length.

14. The method of claim 1, wherein said oligonucleotide is at least 30 nucleotides in length.

15. The method of claim 1, wherein said oligonucleotide is at least 40 nucleotides in length.

16. The method of claim 1, wherein said oligonucleotide is at least 80 nucleotides in length.

17. The method of claim 1, wherein said oligonucleotide is at least 120 nucleotides in length.

18. The method of claim 1, wherein said oligonucleotide comprises at least one phosphodiester linkage.

19. The method of claim 1, wherein said oligonucleotide comprises at least one modification to its chemical structure.

20. The method of claim 1, wherein each said oligonucleotide comprises at least one phosphorothioated linkage.

21. The method of claim 1, wherein said oligonucleotide comprises at least one 2′

-O methyl modification to the ribose moiety.

22. The method of claim 1, wherein said oligonucleotide comprises at least one 2′

-modification to the ribose moiety.

23. The method of claim 1, wherein said oligonucleotide comprises at least one methylphosphonate linkage.

24. The method of claim 1, wherein each said oligonucleotide comprises at least one phosphorodithioated linkage.

25. The method of claim 1, wherein said oligonucleotide is a concatemer consisting of two or more oligonucleotide sequences joined by a linker.

26. The method of claim 1, wherein said oligonucleotide is linked or conjugated at one or more nucleotide residues, to a molecule modifying the characteristics of the oligonucleotide to obtain one or more characteristics selected from the group consisting of higher stability, lower serum interaction, higher cellular uptake, higher PrP interaction, an improved ability to be formulated for delivery, a detectable signal, higher anti-prion activity, better pharmacokinetic properties, specific tissue distribution, lower toxicity.

27. The method of claim 1, said oligonucleotide is linked or conjugated to a polyethylene glycol.

28. The method of claim 1, wherein said oligonucleotide is double stranded.

29. The method of claim 1, wherein said oligonucleotide is double or single stranded and comprises at least one base which is capable of hybridizing via non-Watson-Crick interactions.

30. The method of claim 1, wherein said oligonucleotide is double or single stranded and comprises at least one abasic moiety.

31. The method of claim 1, wherein said oligonucleotide comprises at least one Gquartet motif portion.

32. The method of claim 1, wherein said oligonucleotide comprises at least one CpG motif portion.

33. The method of claim 1, wherein at least a portion of the sequence of said oligonucleotide comprises polyA, polyC, polyG, polyT, polyAC, polyAG, polyAT, polyCG, polyCT, polyGT, polyU, polyAU, polyCU, or polyGU.

34. The method of claim 1, wherein at least a portion of the sequence of said oligonucleotide comprises two or more repeated sequences.

35. The method of claim 1, wherein said at least one oligonucleotide comprises a mixture of at least two different anti-prion oligonucleotides.

36. The method of claim 1, wherein said at least one oligonucleotide comprises a mixture of at least 10 different oligonucleotides.

37. The method of claim 1, wherein said at least one oligonucleotide comprises a mixture of at least 100 different oligonucleotides.

38. The method of claim 1, wherein said at least one oligonucleotide comprises a mixture of at least 1000 different oligonucleotides.

39. The method of claim 1, where said at least one oligonucleotide comprises a mixture of at least 106 different oligonucleotides.

40. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 6 nucleotides in length.

41. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 10 nucleotides in length.

42. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 20 nucleotides in length.

43. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 40 nucleotides in length.

44. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 60 nucleotides in length.

45. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 80 nucleotides in length.

46. The method of claim 35, wherein a plurality of said different oligonucleotides are at least 120 nucleotides in length.

47. A method for reducing prion activity in a biological material in vitro, comprising contacting said material with at least one anti-prion oligonucleotide.

48. The method of claim 47, wherein said biological material is animal blood.

49. The method of claim 47, wherein said biological material is an animal blood product.

50. The method of claim 47, wherein said biological material is a mammalian tissue.

51. The method of claim 47, wherein said biological material is a mammalian organ.

52. An anti-prion pharmaceutical composition comprising a therapeutically effective amount of at least one pharmacologically acceptable, anti-prion oligonucleotide;

and a pharmaceutically acceptable carrier, wherein said composition is adapted for the treatment, control, or prevention of a prion disease.

53. The anti-prion pharmaceutical composition of claim 52, adapted for delivery by a mode selected from the group consisting of oral ingestion, enterally, inhalation, cutaneous injection, intraocular, subcutaneous injection, intramuscular injection, intraperitoneal injection, intrathecal injection, intraventricular, intracerebral injection, intratrachael injection, and intravenous injection.

54. The anti-prion pharmaceutical composition of claim 52, further comprising a delivery system.

55. The anti-prion pharmaceutical composition of claim 52, further comprising a liposomal formulation.

56. The anti-prion pharmaceutical composition of claim 54, wherein said delivery system or liposomal formulation targets specific cells or specific tissues.

57. The anti-prion pharmaceutical composition of claim 54, wherein said delivery system or liposomal formulation comprises at least one pegylated molecule.

58. The anti-prion pharmaceutical composition of claim 57, wherein said delivery system or liposomal formulation comprises an antibody.

59. The anti-prion pharmaceutical composition of claim 52, wherein said composition further comprises at least one other anti-prion drug in combination.

60. The anti-prion pharmaceutical composition of claim 52, wherein said composition further comprises a non-nucleotide polymer in combination.

61. The anti-prion pharmaceutical composition of claim 60, wherein said polymer is anionic.

62. A kit comprising at least one anti-prion oligonucleotide composition according to claim 52 in a labeled package, wherein a label or insert in said package indicates that said oligonucleotide can be used in treatment, control, or prevention of a prion disease.

63. The kit of claim 62, wherein said kit contains a mixture of at least two different oligonucleotides.

64. The kit of claim 62, wherein said kit is approved by a regulatory agency for use in humans.

65. The kit of claim 62, wherein said kit is approved by a regulatory agency for use in at least one non-human animal.