Recombinant flu vaccines
The present invention provides compositions for use as vaccines against the influenza virus, and rapid methods of producing such compositions. The composition include i) at least one peptide derived from an influenza virus, wherein the peptide is fused to a capsid protein derived from a plant virus forming a recombinant capsid fusion peptide and ii) at least one isolated antigenic protein or protein fragment derived from a human or avian influenza virus. The isolated antigenic protein or protein fragment derived from the human or avian influenza virus can be conjugated to the surface of the recombinant capsid fusion peptide.
1 . A method of producing a composition for use as an influenza vaccine in a human or animal comprising:
i) providing a first nucleic acid encoding a recombinant capsid fusion peptide, the capsid fusion peptide comprising a plant virus capsid protein fused to an influenza viral peptide, and expressing the capsid fusion peptide in a host cell;
ii) assembling the capsid fusion peptide to form a virus or virus like particle;
iii) providing at least one second nucleic acid encoding at least one antigenic protein or protein fragment derived from an influenza virus strain, and expressing the antigenic protein or protein fragment in a host cell;
iv) isolating and purifying the antigenic protein or protein fragment; and
v) combining the virus or virus like particle and the antigenic protein or protein fragment to form a composition capable of administration to a human or animal.
2 . The method of claim 1 , wherein the isolated antigenic protein or protein fragment is conjugated to the virus or virus like particle.
3 . The method of claim 1 , wherein the isolated antigenic protein or protein fragment is derived from a newly emergent strain of influenza.
4 . The method of claim 1 , wherein the capsid fusion peptide comprises an influenza vial peptide derived from a conserved influenza viral peptide.
5 . The method of claim 4 , wherein the conserved influenza viral peptide is derived from an influenza M2 peptide.
6 . The method of claim 5 , wherein the M2 peptide is selected from the group consisting of Seq. ID. NO. 1-5 and 22-24.
7 . The method of claim 6 , wherein the M2 peptide is selected from the group consisting of Seq. ID. NO. 3, 22, 23, and 24.
8 . The method of claim 1 , wherein the plant virus capsid protein is derived from a CCMV or CPMV plant virus.
9 . The method of claim 8 , wherein the plant virus capsid protein is selected from the group consisting of Seq. ID. NO. 11-13.
10 . The method of claim 1 , wherein the virus or virus like particle does not contain proteins from the host cell plasma membrane or cell wall.
11 . A composition comprising:
i) a recombinant capsid fusion peptide, the capsid fusion peptide comprising a plant virus capsid protein fused to an influenza viral peptide, wherein the capsid fusion peptide assembles to form a virus or virus like particle, and
ii) at least one isolated antigenic protein or protein fragment derived from an influenza virus.
12 . The composition of claim 11 , wherein the isolated antigenic protein or protein fragment is conjugated to the virus or virus like particle.
13 . The composition of claim 11 , wherein the isolated antigenic protein or protein fragment is derived from a newly emergent strain of influenza.
14 . The composition of claim 11 , wherein the capsid fusion peptide comprises a influenza viral peptide derived from a conserved influenza viral peptide.
15 . The composition of claim 14 , wherein the conserved influenza viral peptide is derived from an influenza M2 peptide.
16 . The composition of claim 15 , wherein the M2 peptide is selected from the group consisting of Seq. ID. NO. 1-5 and 22-24.
17 . The composition of claim 16 , wherein the M2 peptide is selected from the group consisting of Seq. ID. NO. 3, 22, 23, and 24.
18 . The composition of claim 11 , wherein the plant virus capsid protein is derived from a CCMV or CPMV plant virus.
19 . The composition of claim 18 , wherein the plant virus capsid protein is selected from the group consisting of Seq. ID. NO. 11-13.
20 . The composition of claim 11 , wherein the virus or virus like particle does not contain proteins from the host cell plasma membrane or cell wall.
21 . The composition of claim 11 , wherein the composition further comprises an immunostimulatory molecule.
22 . The composition of claim 21 , wherein the immunostimulatory molecule comprises a CpG sequence.
23 . A peptide sequence selected from the group consisting of Seq. ID. NO. 3, 22, 23, and 24.