Article ; Online: Variable long-term protection by radiation-, chemo-, and genetically-attenuated Plasmodium berghei sporozoite vaccines.
2023 Volume 41, Issue 51, Page(s) 7618–7625
Abstract: Long-term protection against malaria remains one of the greatest challenges of vaccination against this deadly parasitic disease. Whole-sporozoite (WSp) malaria vaccine formulations, which target the Plasmodium parasite's pre-erythrocytic stages, include ...
Abstract | Long-term protection against malaria remains one of the greatest challenges of vaccination against this deadly parasitic disease. Whole-sporozoite (WSp) malaria vaccine formulations, which target the Plasmodium parasite's pre-erythrocytic stages, include radiation-attenuated sporozoites (RAS), early- and late-arresting genetically-attenuated parasites (EA-GAP and LA-GAP, respectively), and chemoprophylaxis with sporozoites (CPS). Although all these four vaccine formulations induce protective immune responses in the clinic, data on the longevity of the antimalarial protection they afford remain scarce. We employed a mouse model of malaria to assess protection conferred by immunization with P. berghei (Pb)-based surrogates of these four WSp formulations over a 36-week period. We show that EA-GAP WSp provide the lowest overall protection against an infectious Pb challenge, and that while immunization with RAS and LA-GAP WSp elicits the most durable protection, the protective efficacy of CPS WSp wanes rapidly over the 36-week period, most notably at higher immunization dosages. Analyses of liver immune cells show that CD44 |
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MeSH term(s) | Humans ; Animals ; Mice ; Plasmodium berghei/genetics ; Sporozoites ; Vaccines, Attenuated ; CD8-Positive T-Lymphocytes ; Lead ; Malaria ; Malaria Vaccines |
Chemical Substances | Vaccines, Attenuated ; Lead (2P299V784P) ; Malaria Vaccines |
Language | English |
Publishing date | 2023-11-25 |
Publishing country | Netherlands |
Document type | Journal Article |
ZDB-ID | 605674-x |
ISSN | 1873-2518 ; 0264-410X |
ISSN (online) | 1873-2518 |
ISSN | 0264-410X |
DOI | 10.1016/j.vaccine.2023.11.023 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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