Sattler, Julia M; Keiber, Lukas; Abdelrahim, Aiman; Zheng, Xinyu; Jäcklin, Martin; Zechel, Luisa; Moreau, Catherine A; Steinbrück, Smilla; Fischer, Manuel; Janse, Chris J; Hoffmann, Angelika; Hentzschel, Franziska; Frischknecht, Friedrich (2024). Experimental vaccination by single dose sporozoite injection of blood-stage attenuated malaria parasites. (In Press). EMBO molecular medicine EMBO Press 10.1038/s44321-024-00101-6
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sattler-et-al-2024-experimental-vaccination-by-single-dose-sporozoite-injection-of-blood-stage-attenuated-malaria.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (3MB) | Preview |
Malaria vaccination approaches using live Plasmodium parasites are currently explored, with either attenuated mosquito-derived sporozoites or attenuated blood-stage parasites. Both approaches would profit from the availability of attenuated and avirulent parasites with a reduced blood-stage multiplication rate. Here we screened gene-deletion mutants of the rodent parasite P. berghei and the human parasite P. falciparum for slow growth. Furthermore, we tested the P. berghei mutants for avirulence and resolving blood-stage infections, while preserving sporozoite formation and liver infection. Targeting 51 genes yielded 18 P. berghei gene-deletion mutants with several mutants causing mild infections. Infections with the two most attenuated mutants either by blood stages or by sporozoites were cleared by the immune response. Immunization of mice led to protection from disease after challenge with wild-type sporozoites. Two of six generated P. falciparum gene-deletion mutants showed a slow growth rate. Slow-growing, avirulent P. falciparum mutants will constitute valuable tools to inform on the induction of immune responses and will aid in developing new as well as safeguarding existing attenuated parasite vaccines.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology |
UniBE Contributor: |
Hoffmann, Angelika |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1757-4684 |
Publisher: |
EMBO Press |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
06 Aug 2024 16:02 |
Last Modified: |
07 Aug 2024 15:28 |
Publisher DOI: |
10.1038/s44321-024-00101-6 |
PubMed ID: |
39103697 |
Uncontrolled Keywords: |
Plasmodium Genetic Attenuation Malaria Vaccine Virulence |
BORIS DOI: |
10.48350/199509 |
URI: |
https://boris.unibe.ch/id/eprint/199509 |
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