Zika virus vaccine

Patent metadata

Field	Value
Publication number	US-12005111-B2
Application number	US-202117548721-A
Country	US
Kind code	B2
Filing date	Dec 13, 2021
Priority date	Dec 23, 2015
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

Described herein are Zika virus vaccines and compositions and methods of producing and administering said vaccines to subjects in need thereof.

First claim

What is claimed is:

1. A Zika virus vaccine comprising a Zika virus having an RNA genome corresponding to the DNA sequence provided by SEQ ID NO: 13 or a variant nucleic acid having at least 99% identity to SEQ ID NO: 13, wherein the sequence identity is determined by Needleman-Wunsch homology alignment, wherein said Zika virus vaccine is capable of stimulating a neutralizing antibody titer greater than 15 in at least 70% of vaccinated subjects,
wherein the neutralizing antibody titer is determined using a microneutralization assay (MN50) following a single administration of the Zika virus vaccine to a subject; and
wherein the Zika virus comprises an E protein having an amino acid sequence provided by SEQ ID NO: 48 and is able to pack a virulent Zika virus.

2. The Zika virus vaccine of claim 1 , wherein the RNA genome corresponds to the DNA sequence provided by SEQ ID NO: 13.

3. The Zika virus vaccine of claim 1 , wherein the variant nucleic acid has at least 99.5% identity to SEQ ID NO: 13, wherein the sequence identity is determined by Needleman-Wunsch homology alignment.

4. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 20.

5. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 30.

6. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 40.

7. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 50.

8. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 60.

9. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 70.

10. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than 80.

11. The Zika virus vaccine of claim 1 , wherein said MN50 is greater than or equal to 90.

12. The Zika virus vaccine of claim 1 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 80% of vaccinated subjects.

13. The Zika virus vaccine of claim 1 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 90% of vaccinated subjects.

14. The Zika virus vaccine of claim 1 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 95% of vaccinated subjects.

15. The Zika virus vaccine of claim 1 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 99% of vaccinated subjects.

16. The Zika virus vaccine of claim 1 , wherein the Zika virus is inactivated by chemical inactivation, thermal inactivation, pH inactivation, or UV inactivation.

17. The Zika virus vaccine of claim 16 , wherein the chemical inactivation comprises contacting the Zika virus with a chemical inactivation agent for longer than is required to completely inactivate the Zika virus as measured by plaque assay.

18. The Zika virus vaccine of claim 16 , wherein the chemical inactivation comprises contacting the Zika virus with formaldehyde.

19. The Zika virus vaccine of claim 18 , wherein the chemical inactivation comprises contacting the Zika virus with formaldehyde for between 2-10 days.

20. The Zika virus vaccine of claim 18 , wherein the chemical activation is performed at about +4° C. or about +22° C.

21. The Zika virus vaccine of claim 1 , further comprising an adjuvant.

22. The Zika virus vaccine of claim 21 , wherein the adjuvant is an aluminium salt adjuvant.

23. The Zika virus vaccine of claim 22 , wherein said aluminium salt adjuvant is aluminium hydroxide with less than 1.25 parts per billion copper based on a final pharmaceutical composition comprising the Zika virus.

24. The Zika virus vaccine of claim 21 , wherein the adjuvant comprises a peptide and a deoxyinosine-containing immunostimulatory oligodeoxynucleic acid molecule (I-ODN).

25. The Zika virus vaccine of claim 24 , wherein the peptide comprises the sequence KLKL5KLK (SEQ ID NO: 71) and the I-ODN comprises oligo-d(IC)13 (SEQ ID NO: 70).

26. The Zika virus vaccine of claim 1 , further comprising one or more pharmaceutically acceptable excipients.

27. The Zika virus vaccine of claim 1 , wherein the vaccine comprises protamine sulphate (PS) or fragments or break-down products of PS at amounts below the limits of detection by high performance liquid chromatography (HPLC).

28. The Zika virus vaccine of claim 27 , wherein said PS or fragments or break-down products of PS are detectable by mass spectroscopy.

29. The Zika virus vaccine of claim 1 , wherein the vaccine comprises protamine sulphate (PS) or fragments or break-down products of PS at amounts below 1 μg/mL or below 100 ng/mL.

30. The Zika virus vaccine of claim 1 , further comprising a TLR9 agonist.

31. A Zika virus vaccine comprising a Zika virus having an RNA genome corresponding to a DNA sequence having at least 99.9% identity to SEQ ID NO: 13, wherein the sequence identity is determined by Needleman-Wunsch homology alignment, wherein said Zika virus vaccine is capable of stimulating a neutralizing antibody titer greater than 15 in at least 70% of vaccinated subjects, wherein the neutralizing antibody titer is determined using a microneutralization assay (MN 50 ) following a single administration of the Zika virus vaccine to a subject;
wherein the Zika virus comprises an E protein having an amino acid sequence provided by SEQ ID NO: 48; and
wherein the Zika virus is Vero cell adapted and is able to pack a virulent Zika virus.

32. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 20.

33. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 30.

34. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 40.

35. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 50.

36. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 60.

37. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 70.

38. The Zika virus vaccine of claim 31 , wherein said MN50 is greater than 80.

39. The Zika virus vaccine of claim 31 , wherein said MN50 is greater or equal to 90.

40. The Zika virus vaccine of claim 31 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 80% of vaccinated subjects.

41. The Zika virus vaccine of claim 31 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 90% of vaccinated subjects.

42. The Zika virus vaccine of claim 31 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 95% of vaccinated subjects.

43. The Zika virus vaccine of claim 31 , wherein the Zika virus vaccine is capable of stimulating a MN50 titer greater than 15 in at least 99% of vaccinated subjects.

44. The Zika virus vaccine of claim 31 , wherein the Zika virus is inactivated by chemical inactivation, thermal inactivation, pH inactivation, or UV inactivation.

45. The Zika virus vaccine of claim 44 , wherein the chemical inactivation comprises contacting the Zika virus with a chemical inactivation agent for longer than is required to completely inactivate

Assignees

• Valneva Austria Gmbh

Inventors

• Barbero Calzado Jana
• Nebenführ Mario
• Schlegl Robert
• Weber Michael
• Heindl-Wruss Jürgen

Classifications

• A61K2039/55505

  Inorganic adjuvants · CPC title

• A61K2039/5254

  avirulent or attenuated · CPC title

• C07K14/18

  Togaviridae; {Flaviviridae} · CPC title

• A61K2039/5258

  Virus-like particles · CPC title

• A61K39/39

  characterised by the immunostimulating additives, e.g. chemical adjuvants · CPC title