Recombinant PRRSV proteins, diagnostic kits and vaccines containing such recombinant PRRSV proteins

• US 5,888,513 A
• Filed: 04/08/1996
• Issued: 03/30/1999
• Est. Priority Date: 05/13/1994
• Status: Expired due to Term

• Current Assignee: American Colloid Company (Minerals Technologies Incorporated)
• Original Assignee: American Colloid Company (Minerals Technologies Incorporated)
• Inventors: Climent Sanchez, Isabel, Plana Duran, Juan, Casal Alvarez, Jose Ignacio
• Primary Examiner(s): Mosher, Mary E.
• Assistant Examiner(s): SALIMI, ALI REZA
• Application Number:
  US08/578,614
• Time in Patent Office: 1,086 Days
• Field of Search: 424/199.1, 424/815, 424/176.1, 424/186.1, 424/201.1, 424/177.1, 424/278.1, 424/198.1, 424/704.1, 435/235.1, 435/7.92, 435/7.95, 435/91.1, 435/5, 435/252.3, 435/239-325, 435/320.1, 530/350, 536/23.72
• US Class Current: 424/186.1
• CPC Class Codes: A61K 39/00 Medicinal preparations containing antigens or antibodies materials for immunoassay G01N33/53
• CPC Class Codes: A61P 31/12 Antivirals
• CPC Class Codes: C07K 14/005 from viruses
• CPC Class Codes: C12N 2710/14143 viral genome or elements thereof as genetic vector
• CPC Class Codes: C12N 2770/10022 New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes
• CPC Class Codes: Y10S 424/815 Viral vaccine for porcine species, e.g. swine

Abstract

Recombinant proteins of the causative virus of porcine reproductive and respiratory syndrome (PRRS), corresponding to ORFs 2 to 7 of the PRRSV Spanish isolate (PRRS-Olot), have been produced in baculovirus expression system using Sf9 cell cultures as a permissive host. These recombinant proteins are suitable for the formulation of vaccines capable of efficaciously protecting porcine livestock from PRRS and for the preparation of diagnostic kits adequate for detection of anti-PRRSV antibodies as well as of PRRSV in a pig biological sample. This invention is of interest to Veterinary Medicine.

Claims

1. An isolated protein from the causative virus of porcine reproductive and respiratory syndrome selected from the group consisting of proteins coded by ORFs 2 to 7 of the virus PRRS-Olot.

2. The isolated protein of claim 1 selected from the group consisting of proteins coded by ORFs 3 to 6 of the virus PRRS-Olot.

3. An isolated protein from the causative virus of porcine reproductive and respiratory syndrome comprising at least one amino acid sequence selected from the group consisting of the amino acid sequences depicted in SEQ ID NO:

2 through SEQ ID NO;

7.

4. The isolated protein of claim 3 comprising at least one amino acid sequence selected from the group consisting of the amino acid sequences depicted in SEQ ID NO:

3 through SEQ ID NO;

6.

5. The isolated protein of claim 3 comprising a combination of the amino acid sequences of SEQ ID NO:

3, SEQ ID NO;

5, and SEQ ID NO;

7.

6. The isolated protein of claim 4 comprising a combination of the amino acid sequences depicted in SEQ ID NO:

3 and SEQ ID NO;

5.

7. The isolated protein of claim 4 comprising the amino acid sequence selected from the group consisting of sequences depicted in SEQ ID NO:

3 or SEQ ID NO;

5.

8. An isolated nucleotide sequence comprising at least one ORF selected from the group consisting of ORFs 2 to 7 of the virus PRRS-Olot.

9. The isolated nucleotide sequence of claim 8 comprising at least one ORF selected from the group consisting of ORFs 3 to 6 of the virus PRRS-Olot.

10. The isolated nucleotide sequence of claim 9 comprising at least one ORF selected from the group consisting of ORF3 to ORF5 of the virus PRRS-Olot.

11. The isolated nucleotide sequence of claim 10 comprising ORF3 of the virus PRRS-Olot.

12. The isolated nucleotide sequence of claim 10 comprising ORF5 of the virus PRRS-Olot.

13. The isolated nucleotide sequence of claim 8 comprising ORF7 of the virus PRRS-Olot.

14. The isolated nucleotide sequence of claim 8 comprising a combination of ORF3, ORF5, and ORF7 of the virus PRRS-Olot.

15. A plasmid comprising at least one nucleotide sequence of claims 8, 9, 10, 11, 12, 13, or 14.

16. The plasmid of claim 15 comprising a combination of the nucleotide sequence of claims 11, 12, and 13.

17. A transfer vector comprising the nucleotide sequences of claims 8, 9, 10, 11, 12, 13, or 14.

18. The transfer vector of claim 17 comprising the nucleotide sequence of claims 11, 12, or 13.

19. The transfer vector of claim 17 further comprising pAcYM1.

20. The transfer vector of claim 18 further comprising pAcYM1.

21. A recombinant expression system comprising the transfer vector of claim 17.

22. The expression system of claim 21 wherein said recombinant expression system is a recombinant baculovirus.

23. The recombinant baculovirus of claim 22 selected from the group consisting of recombinant baculoviruses deposited with the ECACC and having Accession Numbers V94021007, V94011325, V94021008, V94011326, V94011327, and V94011328.

24. The recombinant baculoviruses of claim 23 having ECACC Accession Numbers V94011325, V94011326, and V94011328.

25. A host cell capable of expressing the viral subunit protein encoded by the isolated nucleotide sequence of claims 8, 9, 10, 11, 12, 13, 14.

26. A host cell infected with the recombinant expression system of claim 21.

27. The host cell of claim 26 wherein said host cell is an insect cell and said recombinant expression system is a recombinant baculovirus.

36. An immunogenic composition comprising a cell homogenate containing at least one of the host cells of claim 25.

37. The composition of claim 36 wherein said host cell is an insect cell.

38. An immunogenic composition comprising at least one expression product of recombinant baculovirus of claim 22.

39. An immunogenic composition comprising at least one expression product of recombinant baculovirus of claim 23.

43. The composition of claim 36 wherein the adjuvant is aqueous.

28. A method of expressing isolated viral subunit proteins from the causative agent of porcine reproductive and respiratory syndrome of the virus PRRS-Olot comprising the steps of:

i) inserting at least one isolated nucleotide sequence selected from the group consisting of ORFs 2 to 7 of PRRS-Olot into suitable transfer vectors;

ii) transfecting permissive host cells with the transfer vectors so obtained; and

iii) selecting for recombinant expression systems that express the protein encoded by the corresponding ORF.

29. The method of claim 28 wherein at least one nucleotide sequence is selected from the group consisting of ORFs 3, 5, or 7.

30. The method of claim 28 or 29 wherein the recombinant expression system is a baculovirus.

31. The method of claim 30 wherein the transfer vector is pAcYM1.

32. The method of claim 30 wherein said host cells are insect cells.

33. The method of claim 32 wherein said transfecting step comprises transfecting with a mixture of the transfer vector and DNA of wild-type baculovirus.

34. A recombinant baculovirus obtained by the method of claim 30.

35. A vaccine comprising at least one isolated protein encoded by any of ORFs 3, and 5 of PRRS-Olot and a suitable carrier.

40. The composition of any of claims 35, 36, 37, 38, or 39 further comprising an adjuvant.

41. The composition of claim 40 wherein the adjuvant is oil-based.

42. The composition of claim 41 wherein the adjuvant comprises a mixture of Marcol RTM 52, Simulsol 5100, and Mintanide RTM 888.

44. The composition of any of claim 35, 36, 37, 38, or 39 further comprising a cell response potentiator.

45. The composition of claim 44 further comprising an adjuvant.

46. The composition of claim 44 wherein said cell response potentiator is selected from the group consisting of IL-1, IL-2, IL-4, IL-5, IL-6, IL-12, g-IFN, and cell necrosis factors.

47. The composition of any of claims 35, 36, 37, 38, or 39 further comprising at least one additional porcine pathogen.

48. The composition of claim 47 wherein said porcine pathogen is selected from the group consisting of Actinobacillus pleuropneumoniae, Haemophilus parasuis, Porcine parvovirus, Leptospira, Escherichia coli, Erysipelothrix rhusiopathiae, Pasteurella multocida, Bordetella bronchiseptica, Porcine respiratory coronavirus, Rotavirus, pathogens causative of Adjezky'"'"'s Disease, Swine Influenza or Transmissible Gastroenteritis.

49. The composition of claim 47 further comprising an adjuvant.

50. The composition of claim 47 further comprising a cell response potentiator.

51. A diagnostic kit for the detection of the presence of antibodies that specifically identify PRRSV in a biological sample comprising at least one isolated protein encoded by any of ORFs 2 to 7 of PRRS-Olot and suitable detection means.

52. A diagnostic kit for the detection of the presence of PRRSV in a biological sample comprising antibodies to at least one isolated protein encoded by ORFs 2 to 7 of PRRS-Olot and a suitable detection means.