A Live Salmonella Vaccine Delivering PcrV through the Type III Secretion System Protects against Pseudomonas aeruginosa
is a common Gram-negative opportunistic pathogen that is intrinsically resistant to a wide range of antibiotics. The development of a broadly protective vaccine against remains a major challenge. Here, we used an attenuated strain of serovar Typhimurium as a vehicle to express antigens. A fusion bet...
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Published in | mSphere Vol. 4; no. 2 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Society for Microbiology
17.04.2019
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Subjects | |
Online Access | Get full text |
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Summary: | is a common Gram-negative opportunistic pathogen that is intrinsically resistant to a wide range of antibiotics. The development of a broadly protective vaccine against
remains a major challenge. Here, we used an attenuated strain of
serovar Typhimurium as a vehicle to express
antigens. A fusion between the
type III secretion effector protein SseJ and the
antigen PcrV expressed under the control of the
promoter was translocated by
into host cells
and elicited the generation of specific antibodies in mice. Mice immunized with attenuated
expressing this fusion had reduced bacterial loads in the spleens and lungs and lower serum levels of proinflammatory cytokines than control mice after
infection. Importantly, immunized mice also showed significantly enhanced survival in this model. These results suggest that type III secretion effectors of
are appropriate carriers in the design of a live vaccine to prevent infections caused by
The Gram-negative bacterium
is an important opportunistic pathogen that causes infections in cystic fibrosis and hospitalized patients. Therapeutic treatments are limited due to the emergence and spread of new antibiotic-resistant strains. In this context, the development of a vaccine is a priority. Here, we used an attenuated strain of
serovar Typhimurium as a vehicle to express and deliver the
antigen PcrV. This vaccine induced the generation of specific antibodies in mice and protected them from lethal infections with
This is an important step toward the development of an effective vaccine for the prevention of infections caused by
in humans. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Present address: Meritxell García-Quintanilla, University Hospital, Goethe-University, Institute for Medical Microbiology and Infection Control, Frankfurt, Germany. Citation Aguilera-Herce J, García-Quintanilla M, Romero-Flores R, McConnell MJ, Ramos-Morales F. 2019. A live Salmonella vaccine delivering PcrV through the type III secretion system protects against Pseudomonas aeruginosa. mSphere 4:e00116-19. https://doi.org/10.1128/mSphere.00116-19. |
ISSN: | 2379-5042 2379-5042 |
DOI: | 10.1128/mSphere.00116-19 |