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Recombinant Mycobacterium bovis BCG expressing the LipL32 antigen of Leptospira interrogans protects hamsters from challenge. 2007

Fabiana Kömmling Seixas, and Everton Fagonde da Silva, and Daiane Drawanz Hartwig, and Gustavo Maia Cerqueira, and Marta Amaral, and Michel Quevedo Fagundes, and Robson Grando Dossa, and Odir Antônio Dellagostin
Centro de Biotecnologia, Universidade Federal de Pelotas, Campus Universitário, 96010-900 Pelotas - RS, Brazil.

The bacillus Calmette--Guerin (BCG), a live attenuated Mycobacterium bovis strain is considered a promising candidate as a vector system for delivery of foreign antigens to the immune system. The gene coding for the Leptospira interrogans external membrane protein LipL32, a highly immunogenic antigen found in all pathogenic leptospira, was cloned into several mycobacterial vectors for expression in BCG. Hamsters immunized with recombinant BCG (rBCG) expressing LipL32 were protected against mortality (P<or=0.05) upon challenge with a lethal inoculum of L. interrogans serovar Copenhageni. Autopsy examination did not reveal macroscopic or histological evidence of disease in rBCG immunized hamsters that survived lethal challenge. The data presented here further enhance the status of LipL32 as a promising candidate antigen for use in the control of leptospirosis, when presented to the immune system by an appropriate delivery system.

UI MeSH Term Description Entries
D007114 Immunization Deliberate stimulation of the host's immune response. ACTIVE IMMUNIZATION involves administration of ANTIGENS or IMMUNOLOGIC ADJUVANTS. PASSIVE IMMUNIZATION involves administration of IMMUNE SERA or LYMPHOCYTES or their extracts (e.g., transfer factor, immune RNA) or transplantation of immunocompetent cell producing tissue (thymus or bone marrow). Immunologic Stimulation,Immunostimulation,Sensitization, Immunologic,Variolation,Immunologic Sensitization,Immunological Stimulation,Sensitization, Immunological,Stimulation, Immunologic,Immunizations,Immunological Sensitization,Immunological Sensitizations,Immunological Stimulations,Sensitizations, Immunological,Stimulation, Immunological,Stimulations, Immunological,Variolations
D007921 Leptospira interrogans A genus of question mark-shaped bacteria spirochetes which is found in fresh water that is contaminated by animal urine. It causes LEPTOSPIROSIS. Leptospira icteroides,Spirochaeta icterogenes,Spirochaeta icterohaemorrhagiae,Spirochaeta interrogans,Spirochaeta nodosa
D007922 Leptospirosis Infections with bacteria of the genus LEPTOSPIRA. Cane-Cutter Fever,Canicola Fever,Leptospira Canicola Infection,Leptospira Infection,Leptospirosis Canicola,Mud Fever,Rice-Field Fever,Stuttgart Disease,Swineherd's Disease,Cane Cutter Fever,Fever, Canicola,Fever, Mud,Fever, Rice-Field,Fevers, Cane-Cutter,Infection, Leptospira,Infection, Leptospira Canicola,Infections, Leptospira,Infections, Leptospira Canicola,Leptospira Canicola Infections,Leptospira Infections,Leptospiroses,Leptospirosis Canicolas,Rice Field Fever,Swineherd's Diseases
D008074 Lipoproteins Lipid-protein complexes involved in the transportation and metabolism of lipids in the body. They are spherical particles consisting of a hydrophobic core of TRIGLYCERIDES and CHOLESTEROL ESTERS surrounded by a layer of hydrophilic free CHOLESTEROL; PHOSPHOLIPIDS; and APOLIPOPROTEINS. Lipoproteins are classified by their varying buoyant density and sizes. Circulating Lipoproteins,Lipoprotein,Lipoproteins, Circulating
D008297 Male Males
D008647 Mesocricetus A genus in the order Rodentia and family Cricetidae. One species, Mesocricetus auratus or golden hamster is widely used in biomedical research. Hamsters, Golden,Hamsters, Golden Syrian,Hamsters, Syrian,Mesocricetus auratus,Syrian Golden Hamster,Syrian Hamster,Golden Hamster,Golden Hamster, Syrian,Golden Hamsters,Golden Syrian Hamsters,Hamster, Golden,Hamster, Syrian,Hamster, Syrian Golden,Syrian Hamsters
D009163 Mycobacterium bovis The bovine variety of the tubercle bacillus. It is called also Mycobacterium tuberculosis var. bovis. BCG,Calmette-Guerin Bacillus
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D005260 Female Females
D006224 Cricetinae A subfamily in the family MURIDAE, comprising the hamsters. Four of the more common genera are Cricetus, CRICETULUS; MESOCRICETUS; and PHODOPUS. Cricetus,Hamsters,Hamster

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