Lipopeptide-based oral vaccine against hookworm infection

Bartlett, Stacey, Eichenberger, Ramon M., Nevagi, Reshma J., Ghaffar, Khairunnisa Abdul, Marasini, Nirmal, Dai, Yang, Loukas, Alex, Toth, Istvan, and Skwarczynski, Mariusz (2020) Lipopeptide-based oral vaccine against hookworm infection. Journal of Infectious Diseases, 221 (6). pp. 934-942.

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View at Publisher Website: https://doi.org/10.1093/infdis/jiz528
 
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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.

Item ID: 62669
Item Type: Article (Research - C1)
ISSN: 1537-6613
Keywords: hookworm, lipopeptide, oral vaccine, Nippostrongylus brasiliensis, Necator americanus
Copyright Information: © The Author(s) 2019. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved.
Funders: National Health and Medical Research Council of Australia (NHMRC), University of Queensland (UQ), Swiss National Science Foundation (SNSF)
Projects and Grants: NHMRC program grant 1132975, UQ Research Training Program Scholarship, SNSF Early Postdoctoral Mobility Fellowship P2ZHP3_161693, NHMRC Senior Principle Research Fellowship grant 1117504
Date Deposited: 01 Apr 2020 07:39
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320211 Infectious diseases @ 30%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320499 Immunology not elsewhere classified @ 40%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3207 Medical microbiology > 320704 Medical parasitology @ 30%
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