A whole parasite vaccine to control the blood stages of Plasmodium - the case for lateral thinking
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Abstract
Now, 27 years following the cloning of malaria antigens with the promise of the rapid development of a malaria vaccine, we face significant obstacles that are belatedly being addressed. Poor immunogenicity of subunit vaccine antigens and significant antigenic diversity of target epitopes represent major hurdles for which there are no clear strategies for a way forward within the current paradigm. Thus, a different paradigm - a vaccine that uses the whole organism - is now being examined. Although most advances in this approach relate to a vaccine for the pre-erythrocytic stages (sporozoites, liver stages), this opinion paper will outline the possibilities of developing a whole parasite vaccine for the blood stage and address some of the challenges for this strategy, which are entirely different to the challenges for a subunit vaccine. It is the view of the author that both vaccine paradigms should be pursued, but that success will come more quickly using the paranormal approach of exposing individuals to ultra-low doses of whole attenuated or killed parasites.
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Trends in Parasitology
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27
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8
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Biological sciences
Infectious agents
Agricultural, veterinary and food sciences
Biomedical and clinical sciences