VACUNA CONTRA BLEB DISEÑADA MEDIANTE INGENIERIA GENETICA

• Main Authors: DALEMANS, WILFRIED L, LOBET, YVES, BERTHET, FRANCOIS-XAVIER JACQUES, DENOEL, PHILIPPE, FERON, CHRISTIANE, DEQUESNE, GUY
• Format: Patent
• Language: Spanish
• Published: 16.06.2007
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF; CULTURE MEDIA; ENZYMOLOGY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; ORGANIC CHEMISTRY; PEPTIDES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PROCESSES USING MICROORGANISMS; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS; SPIRITS; VINEGAR; WINE

Una preparación de bleb diseñada mediante ingeniería genética aislada de una cepa de Neisseria meningitidis modificada, caracterizada en que dicha preparación se puede obtener empleando los siguientes procedimientos: a) un procedimiento para reducir la variable inmunodominante o los antígenos no protectores en el interior de la preparación bleb, que comprende las etapas de diseñar mediante ingeniería una cepa bacteriana para producir menos o nada del antígeno PorA, y fabricar blebs a partir de dicha cepa; The present invention relates to an immuno-protective and non-toxic Gram-negative bleb vaccine suitable for paediatric use. Examples of the Gram-negative strains from which the blebs are made are N. meningitidis, M. catarrhalis and H. influenzae. The blebs of the invention have one or more genetic changes in the chromosome of the bacterium, including up-regulation of protective antigens, down-regulation of immunodominant non-protective antigens, and detoxification of the Lipid A moiety of LPS.