Outer membrane vesicles and uses thereof

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Bacterium or component thereof or substance produced by said...

Reexamination Certificate

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Reexamination Certificate

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08029807

ABSTRACT:
The present invention discloses a Gram negative bacterium in which the expression of a protein involved in LPS transport to the outer membrane is functionally downregulated such that the level of LPS in the outer membrane is decreased compared to a wild-type Gram negative bacterium. Down regulation of Imp and MsbA proteins can result in such a bacterium. Outer membrane vesicle preparations derived from the Gram negative bacterium of the invention can be used in vaccines to provide protection against bacterial infection.

REFERENCES:
patent: 2004/0126389 (2004-07-01), Berthet et al.
patent: 2004014418 (2004-02-01), None
Steeghs et al. (Infect. Immun., 67:4988-4993, 1999).
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Bos et al.; “Identification of an outer membrane protein required for the transport of lipopolysaccharide to the bacterial cell surface”; Proceedings of the National Academy of Sciences; 2004; vol. 101, No. 25; pp. 9417-9422.
Morley et al.; “Vaccine prevention of meningococcal disease, coming soon?”; Vaccine; 2001; vol. 20, Nos. 5-6; pp. 666-687.
Genevrois et al.; “The Omp85 Protein ofNeisseria meningitidisis required for lipid export to the outer membrane”; EMBO Journal; 2003; vol. 22, No. 8; pp. 1780-1789.
Moudallal et al.; “Monoclonal antibodies as probes of the antigenic structure of tobacco mosaic virus”; EMBO Journal; 1982; vol. 1; pp. 1005-1010.
McGuinness et al.; “Class 1 outer membrane protein ofNeisseria meningitidis: epitope analysis of the antigenic diversity between strains, implications for subtype definition and molecular epidemiology”; Molecular Microbiology; 1993; vol. 7; pp. 505-514.
Greenspan et al.; “Defining epitopes: It's not as easy as it seems”; Nature Biotechnology; 1999; vol. 17; pp. 936-937.
Cruse et al.; Illustrated Dictionary of Immunology, 2nd ed.; 2003; pp. 46, 166, 382.
Bowie et al.; “Deciphering the Message in Protein Sequences: Tolerance to Amino Acid Substitutions”; Science; 1990; vol. 247, No. 4948; pp. 1306-1310.

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