IP Library › Granted Patent US 12,227,770
Granted Patent B2
US 12,227,770 · App. 17/481,495 · Granted Feb 18, 2025

Alphavirus replicon particle

Inventors: Wataru Akahata (Kensington, MD); Ryuji Ueno (Easton, MD)
Assignee: VLP Therapeutics, Inc.
C12N7/00A61K39/001162A61K39/12A61P35/00C07K14/005C07K16/2818C12N15/86A61K48/00C12N2770/36122C12N2770/36123C12N2770/36134C12N2770/36143C12N2770/36152
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Quick Facts
Patent No.
US 12,227,770
App. No.
17/481,495
Granted
Feb 18, 2025
Kind
B2
Abstract

Provided is an alphavirus replicon particle (ARP), which comprises (i) alphavirus structural proteins comprising capsid and/or envelope, and (ii) an alphavirus replicon comprising a polynucleotide encoding alphavirus non-structural proteins nsp1, nsp2, nsp3 and nap4 and at least one gene of interest wherein at least one of capsid, and E3 and E2 in the envelope comprise one or more amino acid alteration but E1 in the envelope comprises no amino acid alteration.

Claims (20)

1. A method for introducing a gene of interest into a cell in a subject in need thereof, which comprises administering to the subject an alphavirus replicon particle (ARP), which comprises

(i) alphavirus structural proteins, wherein said alphavirus structural proteins comprise capsid protein, and E1 and E2 envelope proteins, and

(ii) an alphavirus replicon comprising a polynucleotide encoding alphavirus nonstructural proteins nsp1, nsp2, nsp3 and nsp4 and at least one gene of interest,

wherein said alphavirus capsid protein contains a mutation in the Nuclear Localization Signal (NLS), and wherein said mutation is the substitution of lysine with asparagine at the position corresponding to position 64 of VEEV virus capsid protein.

2. The method according to claim 1 , wherein said E1 envelope protein comprises no amino acid alteration.

3. The method according to claim 1 , wherein said alphavirus structural proteins are CHIKV structural proteins or VEEV structural proteins.

4. The method according to claim 1 , wherein said alphavirus structural proteins are VEEV structural proteins.

5. The method according to claim 3 , wherein said VEEV is VEEV strain TC-83.

6. The method according to claim 1 , wherein said gene of interest encodes an antigen.

7. A method for introducing a gene of interest into a cell in a subject in need thereof, which comprises administering to the subject an alphavirus replicon particle (ARP), which comprises

(i) CHIKV structural proteins, wherein said CHIKV structural proteins comprise capsid protein, and E1 and E2 envelope proteins, and

(ii) an alphavirus replicon comprising a polynucleotide encoding alphavirus nonstructural proteins nsp1, nsp2, nsp3 and nsp4 and at least one gene of interest,

wherein said alphavirus capsid protein contains a mutation in the Nuclear Localization Signal (NLS), and wherein said mutation is the substitution of lysine with asparagine at the position corresponding to position 64 of VEEV virus capsid protein.

8. The method of claim 7 , wherein said E2 protein contains at least one substitution at a position selected from: the position corresponding to position 234 of CHIKV E2 protein; and the position corresponding to position 251 of CHIKV E2 protein.

9. The method of claim 7 , wherein said CHIKV structural proteins further comprise envelope protein E3, and wherein said E3 protein contains an altered furin site resistant to furin cleavage.

10. The method according to claim 7 , wherein said E1 envelope protein comprises no amino acid alteration.

11. The method of claim 7 , wherein said CHIKV is CHIKV strain 37997 or strain OPY-1.

12. The method of claim 7 , wherein said alphavirus nonstructural proteins are VEEV nonstructural proteins nsp1, nsp2, nsp2 and nsp4.

13. The method of claim 12 , wherein said VEEV is VEEV strain TC-83.

14. The method of claim 7 , wherein the gene of interest encodes an antigen.

Continuity (3)
Continuation 16225181 · Dec 19, 2018
Provisional Application 62608213 · Dec 20, 2017
Related Publication 20220002682A1 · Jan 6, 2022
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