Non-integrating
The present invention is directed to recombinant lentiviral particles that array the SARS-CoV-2 spike (S) protein on their surface (“SARS-CoV-2 S Protein Lentiviral Particles”), and that optionally comprise an additional copy of a polynucleotide encoding the SARS-CoV-2 spike (S) protein in their viral genome, and to methods for the production of such lentiviral particles. The invention particularly pertains to such SARS-CoV-2 S Protein Lentiviral Particles that have been engineered to be incapable of mediating the integration of their lentiviral genome into the chromosomes of infected cells and/or to be incapable of mediating the reverse transcription of their lentiviral genome. The present invention is also directed to “SARS-CoV-2 S Protein Lentiviral Vaccine” pharmaceutical compositions that comprise such SARS-CoV-2 S Protein Lentiviral Particles. The present invention is additionally directed to the use of such SARS-CoV-2 S Protein Lentiviral Vaccine pharmaceutical compositions for providing immunity to COVID-19 infection to humans and other mammals, either directly or as an inactivated form.
1. A lentiviral particle that:
(A) comprises:
(1) a recombinantly engineered HIV-1 vector that comprises, in the 5′ to 3′ direction:
(a) a human cytomegalovirus (CMV) immediate early enhancer site and promoter;
(b) an HIV-1 5′ LTR region that has been truncated to delete its U3 region;
(c) an HIV-1 ψ region;
(d) an HIV-1 Rev response element (RRE);
(e) an HIV-1 central polypurine tract and central termination sequence (cPPT/CTS);
(f) a heterologous enhancer and promoter;
(g) a woodchuck hepatitis virus post-transcriptional regulatory element (WPRE); and
(h) a self-inactivating HIV-1 3′ LTR region;
(2) a mutated HIV-1 integrase (IN) protein that is incapable of mediating the integration of said recombinantly engineered HIV-1 vector into the chromosome of a recipient cell; and
(3) a mutated HIV-1 reverse transcriptase (RT) protein that is incapable of reverse transcribing said recombinantly engineered HIV-1 vector; and
(B) arrays a SARS-CoV-2 spike (S) protein on its surface.
2. The lentiviral particle of claim 1 , wherein positioned 3′ to said heterologous enhancer and promoter (f), and 5′ to said woodchuck hepatitis virus post-transcriptional regulatory element (WPRE) (g), said recombinantly engineered HIV-1 vector additionally comprises, in the 5′ to 3′ direction:
(i) an internal ribosome entry site (IRES);
(iii) a heterologous transgene that is operably linked to said heterologous enhancer and promoter, and that encodes a heterologous transgene protein.
3. The lentiviral particle of claim 2 , wherein said encoded heterologous transgene protein is an antibiotic resistance determinant, a reporter protein, a protein drug effective in treating SARS-CoV-2 infection, a viral protein, or a protein that comprises the epitope binding domain of an antibody that binds to a SARS-CoV-2 antigen.
4. The lentiviral particle of claim 2 , wherein said encoded heterologous transgene protein is a SARS-CoV-2 protein.
5. The lentiviral particle of claim 4 , wherein said encoded SARS-CoV-2 heterologous transgene protein is a SARS-CoV-2 Spike protein or a SARS-CoV-2 Nucleocapsid (N) protein.
6. An immunogenic composition capable of inducing neutralizing antibodies against the SARS-CoV-2 Spike (S) Protein wherein said composition comprises the lentiviral particle of claim 1 and a pharmaceutically acceptable carrier.
7. The immunogenic composition of claim 6 , wherein the recombinantly engineered HIV-1 vector of said lentiviral particle encodes a heterologous transgene protein.
8. The immunogenic composition of claim 7 , wherein said encoded heterologous transgene protein is a SARS-CoV-2 Spike (S) protein or a SARS-CoV-2 Nucleocapsid (N) protein.
9. The immunogenic composition of claim 6 , wherein said pharmaceutically acceptable carrier is adapted for intramuscular administration.
10. The immunogenic composition of claim 6 , wherein said pharmaceutically acceptable carrier is adapted for intranasal administration.
11. A method for producing the lentiviral particle of claim 1 , wherein said method comprises:
(A) transfecting HEK293 cells with:
(1) a recombinantly engineered HIV-1 vector that comprises, in the 5′ to 3′ direction:
(a) a human cytomegalovirus (CMV) immediate early enhancer site and promoter;
(b) an HIV-1 5′ LTR region that has been truncated to delete its U3 region;
(c) an HIV-1 ψ region;
(d) an HIV-1 Rev response element (RRE);
(e) an HIV-1 central polypurine tract and central termination sequence (cPPT/CTS);
(f) a heterologous enhancer and promoter;
(g) a woodchuck hepatitis virus post-transcriptional regulatory element (WPRE); and
(h) a self-inactivating HIV-1 3′ LTR region;
(2) a packaging vector that comprises a polynucleotide that comprises an HIV-1 gag gene and an HIV-1 pol gene, wherein said HIV-1 pol gene encodes:
(i) a mutated HIV-1 integrase (IN) protein that is incapable of mediating the integration of said recombinantly engineered HIV-1 vector into the chromosome of a recipient cell; and
(ii) a mutated HIV-1 reverse transcriptase (RT) protein that is incapable of reverse transcribing said recombinantly engineered HIV-1 vector;
(3) a REV vector that comprises a polynucleotide that encodes an HIV-1 rev protein; and
(4) an envelope vector that comprises a polynucleotide that encodes a SARS-CoV-2 spike (S) protein; and
(B) permitting said cells to produce said lentiviral particle; wherein said transfection produces said lentiviral particle that comprises:
(1) said recombinantly engineered HIV-1 vector;
(2) said mutated HIV-1 integrase (IN) protein that is incapable of mediating the integration of said recombinantly engineered HIV-1 vector into the chromosome of a recipient cell; and
(3) said mutated HIV-1 reverse transcriptase (RT) protein that is incapable of reverse transcribing said recombinantly engineered HIV-1 vector;
and that arrays said SARS-CoV-2 spike (S) protein on its surface.
12. The method of claim 11 , wherein said recombinantly engineered HIV-1 vector comprises the features of:
pLenti-SV40-puro (SEQ ID NO:27);
pLenti-SV40-puro (-att) (SEQ ID NO:28);
pLenti-CMV-IRES-empty (-att) (SEQ ID NO:67);
pLenti-CMV-IRES-Spike (SEQ ID NO:70);
pLenti-IgGκ-nCoV-Spike-CD8-TM (-att) (SEQ ID NO:83);
pLenti-IgGκ-nCoV-N-CD8-TM (-att) (SEQ ID NO:84); or
pLenti-IL-2 n-CoV-N(-att) (SEQ ID NO:85).
13. The method of claim 11 , wherein said packaging vector comprises the features of pGAG (SEQ ID NO:44).
14. The method of claim 11 , wherein said REV vector comprises the features of pREV (SEQ ID NO:49).
15. The method of claim 11 , wherein said envelope vector comprises the features of pCMV-SARS-CoV-2 S Protein (SEQ ID NO:61).
16. The lentiviral particle of claim 1 , wherein said arrayed SARS-CoV-2 spike (S) protein comprises the amino acid sequence of SEQ ID NO:54.
17. The lentiviral particle of claim 1 , wherein said arrayed SARS-CoV-2 spike (S) protein differs from the sequence of SEQ ID NO:54 by comprising:
(A) the substitution: D614G; S247R; H49Y; S221W; Y28N; A930V; F797C; F157L; H655Y; G181V; N74K; K528X; K814X; D614X; V473A; A348T; G476S; A520S; T29I; L5F; E96D; D1168H; A1078V; D111N; H519Q; A942X; L8V; G910X; S50L; A27V; T2401; A653V; A570V; G644X; Y265X; L1152X; S71F; D80Y; V70F, C1250Y; P9L; V772I; I197V; S98F; N148S; V367F; T791I; P217X; M731I; M1237I; A845S; S704X; L752X; H655X; N354B; S704L; Y28H; G485R; G838S; W152R; or K557X; or
(B) the pair of substitutions: L5F and G476S; P427X and D614G; L54F and D614G; D614G and V615F; D614G and V6221; D614G and V1228X; F238X and D614G; W258L and D614G; D614G and A1078S; D614G and S939F; H146Y and D614G; Y279X and D614G; D614G and I818V; L5F and D614G; D614X and G1124X; D614G and L1203F; D614G and V1065L; Q271R and D614G; K529E and D614G; D614G and S929I; D614G and T768I; V90F and D614G; A522S and D614G; F220X and D614G; D614G and P631S; Y423X and D614G; Y200X and D614G; H49Y and S884F; Y145H and D614G; V503X and D614G; L118F and D614G; A27S and D614G; A67S and F1103L; S750R and L752R; Q239R and D614G; D614G and T676S; or T951 and D614G.
18. The lentiviral particle of claim 1 , that additionally arrays the hemagglutinin (HA) protein of influenza virus, the SARS-CoV spike (S) protein, and/or the MERS-CoV spike (S) protein on its surface.
19. The method of claim 11 , wherein positioned 3′ to said heterologous enhancer and promoter (f), and 5′ to said woodchuck hepatitis virus post-transcriptional regulatory element (WPRE) (g), said recombinantly engineered HIV-1 vector additionally comprises, in the 5′ to 3′ direction:
(i) an internal ribosome entry site (IRES);
(iii) a heterologous transgene that is operably linked to said heterologous enhancer and promoter, and that encodes a heterologous transgene protein.
20. The method of claim 19 , wherein said encoded heterologous transgene protein is an antibiotic resistance determinant, a reporter protein, a protein drug effective in treating SARS-CoV-2 infection, a viral protein, or a protein that comprises the epitope binding domain of an antibody that binds to a SARS-CoV-2 antigen.
21. The method of claim 19 , wherein said encoded heterologous transgene protein is a SARS-CoV-2 protein.
22. The method of claim 21 , wherein said encoded SARS-CoV-2 heterologous transgene protein is a SARS-CoV-2 Spike (S) protein or a SARS-CoV-2 Nucleocapsid (N) protein.