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Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran & Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran.
Abstract:   (525 Views)
Background: Pseudomonas aeruginosa, an opportunistic pathogen, is a common cause of healthcare-associated infections in immunocompromised individuals. The rapid emergence of multidrug-resistant strains has made P. aeruginosa infections progressively difficult to treat. In this study we evaluated the effect of a chimeric protein containing a P. aeruginosa PilQ fragment and the PilA disulfide loop (PilA-DSL) on the humoral immune response in BALB/c mice.

Methods: A chimeric gene encoding an immunogenic region of PilQ and the PilA-DSL was synthesized. Following bacterial expression and purification, the protein was administered to mice and the humoral immune response analyzed. The resulting antibodies were analyzed using an opsonophagocytic killing assay.

Results: The anti-recombinant protein antibody titer was significantly greater in immunized mice than in controls. In addition, antibody titers were significantly increased after booster immunizations, and the immunizations induced opsonophagocytosis of P. aeruginosa PAO1.

Conclusions: These results suggest that an anti-adhesion-based vaccination may be effective in preventing P. aeruginosa infections. Further studies are needed to evaluate the abilities of such bivalent proteins to induce strong immune responses.
Full-Text [PDF 570 kb]   (250 Downloads)    
Type of Article: Original Article | Subject: Microbiology
Received: 2017/07/1 | Accepted: 2017/08/1 | Published: 2018/03/6

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