IP Library › Granted Patent US 12,343,390
Granted Patent B2
US 12,343,390 · App. 17/266,049 · Granted Jul 1, 2025

Recombinant biologically contained filovirus vaccine

Inventors: Yoshihiro Kawaoka (Middleton, WI); Peter J. Halfmann (Madison, WI)
Assignee: Wisconsin Alumni Research Foundation (WARF)
A61K39/12C07K16/005C12N7/00A61K2039/5252A61K2039/55572A61K2039/55577A61K2039/6075A61K2039/70C12N2760/14134C12N2760/14152
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Quick Facts
Patent No.
US 12,343,390
App. No.
17/266,049
Granted
Jul 1, 2025
Kind
B2
Abstract

The invention provides a vaccine comprising a recombinant biologically contained filovirus and methods of making and using those viruses.

Claims (21)

1. A vaccine comprising an effective amount of a recombinant filovirus and one or more adjuvants comprising a saponin, wherein the genome of the recombinant filovirus contains a deletion of one or more nucleotides in a polynucleotide sequence for a viral protein corresponding to Ebola virus VP30, and wherein the deletion is effective to prevent expression of a functional viral protein corresponding to Ebola virus VP30 upon infection of a cell with the recombinant filovirus, wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product and wherein the nucleotide sequence is inserted into the filovirus genome at a site other than the site of the deletion in the polynucleotide or wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product and the nucleotide sequence replaces or is inserted into GP/sGP sequences or a portion thereof.

2. The vaccine of claim 1 wherein the nucleotide sequence that is inserted into the filovirus genome at a site other than the site of the deletion is inserted between NP coding sequences and VP35 coding sequences in the filovirus genome.

3. The vaccine of claim 1 , wherein the heterologous gene product comprises a heterologous filovirus glycoprotein.

4. The vaccine of claim 3 wherein the filovirus glycoprotein comprises a Marburg virus, Ebola virus, Sudan virus, Tai Forest virus, Reston virus, or Bundibugyo virus glycoprotein.

5. The vaccine of claim 1 wherein the adjuvant comprises an extract of Quillaja saponaria.

6. A method to immunize a mammal, comprising administering to the mammal an effective amount of the vaccine of claim 1 .

7. A multivalent vaccine comprising an effective amount of a recombinant filovirus and comprising a saponin, wherein the genome of the recombinant filovirus contains a first deletion in one or more nucleotides for a polynucleotide sequence for a viral protein corresponding to Ebola virus VP30 which deletion is effective to prevent expression of a functional viral protein corresponding to Ebola virus VP30 upon infection of a cell with the recombinant filovirus, wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product and wherein the nucleotide sequence is inserted into the filovirus genome at a site other than the site of the deletion in the polynucleotide or wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product and the nucleotide sequence replaces or is inserted into GP/sGP sequences or a portion thereof, and wherein the genome encodes one or more filovirus glycoproteins.

8. The vaccine of claim 7 wherein one of the gene products comprises Ebola NP, Ebola VP40, Ebola VP35, Marburg NP, Marburg NP VP40, Marburg NP VP35, Plasmodium circumsporozoite protein (CSP), Plasmodium apical membrane antigen (AMA), Plasmodium rhoptry neck protein 2 (RON2), Plasmodium RH5, Marburg GP, flavivirus membrane protein, flavivirus envelope protein, or a bunyavirus glycoprotein precursor (GPC) protein.

9. A method to immunize a mammal, comprising administering to the mammal an effective amount of the vaccine of claim 7 .

10. A method of manufacturing a composition comprising recombinant filovirus and an adjuvant, comprising: providing supernatant from mammalian cells expressing a recombinant filovirus genome that are cultured in serum free medium so as to result in progeny filovirus, wherein the genome of the recombinant filovirus contains a deletion of one or more nucleotides in a polynucleotide sequence for a viral protein corresponding to Ebola virus VP30 which deletion is effective to prevent expression of a functional viral protein corresponding to Ebola virus VP30 upon infection of a cell with the recombinant filovirus, wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product, and wherein the nucleotide sequence is inserted into the filovirus genome at a site other than the site of the deletion in the polynucleotide or wherein the nucleotide sequence replaces or is inserted into GP/sGP sequences or a portion thereof, and wherein the mammalian cells express a viral protein corresponding to Ebola virus VP30;

contacting the supernatant with a DNase and a virus inactivating agent, thereby providing an inactivated viral preparation;

concentrating the inactivated viral preparation; and

combining the inactivated viral preparation and one or more saponin adjuvants.

11. The method of claim 10 wherein the cells are Vero cells.

12. The method of claim 10 wherein the collected supernatant is filtered before contact with the DNase or the viral inactivating agent.

13. The method of claim 12 wherein the collected supernatant is subjected to filtration with a 0.5 to 5 micron filter or a 1 to 5 micron filter.

14. The method of claim 10 wherein the inactivated viral preparation is subjected to filtration.

15. The method of claim 14 wherein the filtration of the inactivated viral preparation is through a 0.01 to 1 micron filter or a 0.05 to 0.25 micron filter.

16. A composition comprising the inactivated virus produced by the method of claim 10 .

17. A vaccine comprising an effective amount of a recombinant filovirus and one or more adjuvants comprising a squalene or a saponin, wherein the genome of the recombinant filovirus contains a deletion of one or more nucleotides in a polynucleotide sequence for a viral protein corresponding to Ebola virus VP30, and wherein the deletion is effective to prevent expression of a functional viral protein corresponding to Ebola virus VP30 upon infection of a cell with the recombinant filovirus, wherein the genome further comprises a nucleotide sequence encoding a prophylactic or therapeutic heterologous gene product, and wherein the nucleotide sequence is inserted into the filovirus genome at a site other than the site of the deletion in the polynucleotide or wherein the nucleotide sequence replaces or is inserted into GP/sGP sequences or a portion thereof.

18. The vaccine of claim 17 wherein the nucleotide sequence is inserted between NP coding sequences and VP35 coding sequences in the filovirus genome.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 22, 2021
From: HALFMANN, PETER; KAWAOKA, YOSHIHIRO
To: WISCONSIN ALUMNI RESEARCH FOUNDATION
Reel/Frame 055349/0582 →
Continuity (2)
Provisional Application 62715673 · Aug 7, 2018
Related Publication 20210290754A1 · Sep 23, 2021
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