Outer membranes of a lipopolysaccharide-protein complex (LPS-17 kDa protein) as chemical tularemia vaccines |
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Authors: | Valentin S Khlebnikov Igor R Golovliov Dmitrij P Kulevatsky Natalia V Tokhtamysheva Sergej F Averin Vladislav E Zhemchugov Sergej Yu Pchelintsev Stanislav S Afanasiev Grigorij Ya Shcherbakov |
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Institution: | Institute of Engineering Immunology, 142380 Lyubuchany, Chekhov District, Moscow Region, Russia |
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Abstract: | Abstract Immunisation with outer membranes of Francisella tularensis induced an efficient protection in guinea pigs against challenge with the virulent strains 503 or 144/713 (type B biovar holarctica ), both clinical isolates, and prevented the development of typical signs of infection in hamadryads (baboons), challenged with the virulent strain Schu (type A, biovar tularensis ) of F. tularensis . Immunisation with a lipopolysaccharide protein complex isolated from the outer membranes afforded protection in CBA mice against challenge with strain 503. Another LPS-protein complex obtained by the simple mixture of LPS preparations from strain 503 and a 17-kDa membrane protein from the avirulent R-variant of the vaccine strain 15 also demonstrated protective properties against experimental tularemia in mice. |
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Keywords: | Francisella tularensis Outer membrane LPS-protein complex |
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