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Recombinant Modified Vaccinia Virus Ankara (MVA) Foot and Mouth Disease Virus (FMDV) Vaccine

a technology of mva and mva, which is applied in the field of mva recombinant modified vaccinia virus ankara (mva) foot and mouth disease virus (fmdv) vaccine, can solve the problems of loss of productivity, periodic epidemics, and very severe economic consequences in the country, and achieves effective immune protection

Inactive Publication Date: 2021-12-23
BAVARIAN NORDIC AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a new method for protecting against foot-and-mouth disease (FMD) in animals. The invention involves using a recombinant vector called MVA, which has been modified to contain a specific antigen from the FMD virus. When the MVA is administered to an animal, it can generate effective immune protection against FMDV infection. The invention can be used to create a vaccine or a cell-based therapy for FMD. The patent also includes a method of producing the MVA vector and a composition containing it for priming and boosting animal immune responses.

Problems solved by technology

In addition, epidemic outbreaks can occur periodically.
The presence of this disease in a country may have very severe economic consequences resulting from loss of productivity, loss of weight and milk production in infected herds, and from trade embargoes imposed on these countries.
In addition, there are risks linked to incomplete inactivation and / or to the escape of virus during the production of inactivated vaccines (King, A. M. Q., ibid).

Method used

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  • Recombinant Modified Vaccinia Virus Ankara (MVA) Foot and Mouth Disease Virus (FMDV) Vaccine
  • Recombinant Modified Vaccinia Virus Ankara (MVA) Foot and Mouth Disease Virus (FMDV) Vaccine
  • Recombinant Modified Vaccinia Virus Ankara (MVA) Foot and Mouth Disease Virus (FMDV) Vaccine

Examples

Experimental program
Comparison scheme
Effect test

example 1

ion of Recombinant MVA

[0132]The following sections describe construction of two recombinant MVAs comprising one or more heterologous nucleic acids expressing an antigenic determinant of a FMDV protein. All other constructs described herein are made using similar methods.

1.1 Cloning and Generation of Two Recombinant MVA-BN®-FMDV Constructs

[0133]For the insertion of foreign genes into the MVA-BN® genome, BN has constructed a set of plasmids. These basic plasmids contain specific regions of the MVA-BN® genome covering deletion sites or intergenic regions of the MVA virus backbone, promoters and different selection cassettes. In order to clone a recombinant MVA-BN®-FMDV vaccine candidate, the transgenes were inserted into one of these basic plasmids, resulting in a final recombination plasmid which was used to promote the insertion of the transgenes into a specific site within the MVA genome via homologous recombination. To allow for homologous recombination between the plasmid and the ...

example 2

ion of Two Recombinant MVA-BN-FMDV Constructs (MVA-mBN360B and mBN361A)

[0140]The two constructs shown in FIG. 1 were generated as candidates for animal experiments. Construct #7B was selected as a candidate and production of MVB and FDP were performed. The recombinant MVA-BN constructs were generated as disclosed under heading 1.1 above.

[0141]A Master Virus Bank of construct #7B was produced in three roller bottles according to the SOPs at Bavarian Nordic. Cells were lysed and the product was aliquoted and stored for later use at −80° C. Genetic analysis for identity, purity and absence of empty vector and selection cassette was confirmed by PCR based methods and sequencing. Further a sterility test and a PCR based test for absence of mycoplasma were performed. The MVB of MVA-mBN360B (#7B) passed all tests. The titer of the MVB-material was determined to be 8.25×106 TCID50 / ml, which is regarded sufficient to go into BDS production.

[0142]The quality tests on the FDP material were fin...

example 3

DV (MVA-mBN360B) in Cattle

[0145]Cattle were immunized on day 0 and on day 21 with doses of 109 TCID50 MVA-mBN360B. On day 4, animals were challenged with 104 pfu of strain A24 Cruzeiro and analysed for signs of infection (tongue) and general disease as scored by the number of infected feet per animal.

TABLE 1Disease scoring of cattle immunized ornot with MVA-mBN360B vaccine.Generalized Disease(days post challenge)bTGVaccineID37101401none124442233302MVA- 3b0000mBN360B4000050000

[0146]All vaccinated animals were fully protected from a FMDV challenge, while none of the non-vaccinated animals were protected. a Animal without tongue lesion b Generalized Disease is given as the number of feet infected with FMDV (maximum score=4).

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Abstract

The present invention relates to modified poxviral vectors and to methods of making and using the same. In particular, the invention relates to recombinant modified vaccinia virus Ankara-based (MVA-based) vaccine against FMDV infection and to related products, methods and uses. Specifically, the present invention relates to genetically engineered (recombinant) MVA vectors comprising at least one heterologous nucleotide sequence encoding an antigenic determinant of a FMDV protein. The invention also relates to products, methods and uses thereof, e.g., suitable to induce a protective immune response in a subject.

Description

[0001]This invention was made with Government support under HSHQDC-12-C-00051 awarded by U.S. Dept. of Homeland Security Office of Procurement and Operations. The Government has certain rights in the invention.FIELD OF THE INVENTION[0002]The present invention relates to an improved FMDV vaccine comprising a recombinant modified vaccinia virus Ankara-based (MVA-based) vaccine against FMDV infection and to related products, methods and uses. Specifically, the present invention relates to genetically engineered (recombinant) MVA vectors comprising a heterologous nucleotide sequence encoding an antigenic determinant of a FMDV protein. The invention also relates to products, methods and uses thereof, e.g., suitable to induce a protective immune response in a subject.BACKGROUND OF THE INVENTION[0003]Foot-and-mouth disease (FMD) is one of the most virulent and contagious diseases affecting farm animals. This disease is endemic in numerous countries in the world, especially in Africa, Asia ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K39/12A61K9/00
CPCA61K39/12A61K9/0019A61K2039/552C12N2770/32134C12N2710/24143C12N7/00C12N15/86C12N2710/24121A61K2039/5256A61P31/14C12N2710/24034
Inventor STEIGERWALD, ROBINKALLA, MARKUS
Owner BAVARIAN NORDIC AS
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