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Singh P, Carrier A, Chen Y, Lin S, Wang J, Cui S, Zhang X. Polymeric microneedles for controlled transdermal drug delivery. J Control Release 2019; 315:97-113. [DOI: 10.1016/j.jconrel.2019.10.022] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/09/2019] [Accepted: 10/12/2019] [Indexed: 01/03/2023]
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Bartlett S, Eichenberger RM, Nevagi RJ, Ghaffar KA, Marasini N, Dai Y, Loukas A, Toth I, Skwarczynski M. Lipopeptide-Based Oral Vaccine Against Hookworm Infection. J Infect Dis 2019; 221:934-942. [DOI: 10.1093/infdis/jiz528] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/11/2019] [Indexed: 01/02/2023] Open
Abstract
Abstract
Background
The human hookworm, Necator americanus, is a parasite that infects almost half a billion people worldwide. Although treatment is available, vaccination is favorable to combat the spread of this parasite due to its wide distribution and continuous reinfection cycle in endemic communities.
Methods
We have designed a lipopeptide oral delivery system using a B-cell epitope derived from the aspartic protease Na-APR-1 from N americanus, attached to a T-helper epitope. Lipopeptides were self-assembled into nanoparticles or entrapped in liposomes that were electrostatically coated with alginate and trimethyl chitosan polymer shields. The adjuvant-free vaccine candidates were orally administered to mice and generated a humoral immune response against both peptide antigen, and the parent protein in the hookworm gut.
Results
The vaccine candidates were evaluated in a rodent hookworm challenge model, resulting in up to 98% and 99% decreases in mean intestinal worm and egg burdens in immunized mice, respectively.
Conclusions
Lipopeptide survived the gastrointestinal conditions, induced humoral immune responses and drived protection against parasite challenge infection.
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Affiliation(s)
- Stacey Bartlett
- The University of Queensland, School of Chemistry and Molecular Biosciences, St Lucia, Australia
| | - Ramon M Eichenberger
- James Cook University, Centre for Molecular Therapeutics, Australian Institute of Tropical Health & Medicine, Cairns, Australia
| | - Reshma J Nevagi
- The University of Queensland, School of Chemistry and Molecular Biosciences, St Lucia, Australia
| | | | - Nirmal Marasini
- The University of Queensland, School of Chemistry and Molecular Biosciences, St Lucia, Australia
| | - Yang Dai
- James Cook University, Centre for Molecular Therapeutics, Australian Institute of Tropical Health & Medicine, Cairns, Australia
| | - Alex Loukas
- James Cook University, Centre for Molecular Therapeutics, Australian Institute of Tropical Health & Medicine, Cairns, Australia
| | - Istvan Toth
- The University of Queensland, School of Chemistry and Molecular Biosciences, St Lucia, Australia
- The University of Queensland, School of Pharmacy, Woolloongabba, Australia
- The University of Queensland, Institute for Molecular Biosciences, St Lucia, Australia
| | - Mariusz Skwarczynski
- The University of Queensland, School of Chemistry and Molecular Biosciences, St Lucia, Australia
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Toth I, Skwarczynski M. Drug Delivery Asia. Curr Drug Deliv 2019; 16:586-587. [PMID: 31603052 DOI: 10.2174/156720181607190917091556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Istvan Toth
- Chair in Biological Chemistry, School of Chemistry & Molecular Biosciences, Professor of Pharmacy, School of Pharmacy, University of Queensland Chemistry Blg #68, StLucia, Qld 4072, Australia
| | - Mariusz Skwarczynski
- School of Chemistry and Molecular Biosciences The University of Queensland St Lucia, QLD 4072, Australia
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