Abstract |
The Pseudomonas aeruginosa type III secretion system protein PopB and its chaperon protein PcrH, when co-administered with the adjuvant curdlan, elicit Th17 responses after intranasal immunization of mice. These PopB/ PcrH- curdlan vaccines protect mice against acute lethal pneumonia in an IL-17-dependent fashion involving CD4 helper T cells secreting IL-17 (Th17 cells). In this study, we tested whether encapsulation of PopB/ PcrH in poly-lactic-co-glycolic acid (PLGA) nanoparticles could elicit Th17 responses to PopB. Recombinant PopB/ PcrH or PcrH alone was encapsulated into PLGA nanoparticles. Mice (FVB/N) were intranasally immunized with the PLGA-PopB/ PcrH nanoparticles, PLGA- PcrH nanoparticles, PLGA alone, or PopB/ PcrH alone. The protective efficacy was assessed in an acute lung infection model with a lethal dose of an ExoU-producing version of P. aeruginosa strain PAO1. Th17 responses were assayed by intracellular flow cytometry and by ELISA for IL-17 in supernatants of splenocytes co-cultured with purified PopB/ PcrH. PLGA-PopB/ PcrH-immunized mice showed 3-4-fold higher Th17 responses both in the lung and in the spleen compared to mice immunized with empty PLGA or PopB/ PcrH alone. After challenge with P. aeruginosa, PLGA-PopB/ PcrH-immunized mice showed significantly lower bacterial counts in the lungs and improved survival. In conclusion, encapsulation of PopB/ PcrH in PLGA nanoparticles can elicit Th17 responses to intranasal vaccination and protect mice against acute lethal P. aeruginosa pneumonia.
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Authors | Matthew M Schaefers, Biyan Duan, Boaz Mizrahi, Roger Lu, Gally Reznor, Daniel S Kohane, Gregory P Priebe |
Journal | Vaccine
(Vaccine)
Vol. 36
Issue 46
Pg. 6926-6932
(11 12 2018)
ISSN: 1873-2518 [Electronic] Netherlands |
PMID | 30314911
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2018 Elsevier Ltd. All rights reserved. |
Chemical References |
- Antigens, Bacterial
- Bacterial Proteins
- Drug Carriers
- Il17a protein, mouse
- Interleukin-17
- PopB protein, Pseudomonas aeruginosa
- Pseudomonas Vaccines
- Vaccines, Subunit
- Vaccines, Synthetic
- Polylactic Acid-Polyglycolic Acid Copolymer
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Topics |
- Administration, Intranasal
- Animals
- Antigens, Bacterial
(administration & dosage, immunology)
- Bacterial Load
- Bacterial Proteins
(administration & dosage, immunology)
- Disease Models, Animal
- Drug Carriers
(administration & dosage)
- Enzyme-Linked Immunosorbent Assay
- Female
- Flow Cytometry
- Interleukin-17
(analysis)
- Lung
(microbiology, pathology)
- Pneumonia, Bacterial
(prevention & control)
- Polylactic Acid-Polyglycolic Acid Copolymer
(administration & dosage)
- Pseudomonas Infections
(prevention & control)
- Pseudomonas Vaccines
(administration & dosage, immunology)
- Survival Analysis
- Th17 Cells
(immunology)
- Vaccines, Subunit
(administration & dosage, immunology)
- Vaccines, Synthetic
(administration & dosage, immunology)
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