Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.

<h4>Background</h4>The asexual blood stages of the human malaria parasite Plasmodium falciparum produce highly immunogenic polymorphic antigens that are expressed on the surface of the host cell. In contrast, few studies have examined the surface of the gametocyte-infected erythrocyte.&l...

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Autores principales:	Maha Saeed, Will Roeffen, Neal Alexander, Christopher J Drakeley, Geoffrey A T Targett, Colin J Sutherland
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5141fbd8546e421c8806f6476ae35064
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spelling	oai:doaj.org-article:5141fbd8546e421c8806f6476ae350642021-12-02T20:12:21ZPlasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.1932-620310.1371/journal.pone.0002280https://doaj.org/article/5141fbd8546e421c8806f6476ae350642008-05-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18509532/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The asexual blood stages of the human malaria parasite Plasmodium falciparum produce highly immunogenic polymorphic antigens that are expressed on the surface of the host cell. In contrast, few studies have examined the surface of the gametocyte-infected erythrocyte.<h4>Methodology/principal findings</h4>We used flow cytometry to detect antibodies recognising the surface of live cultured erythrocytes infected with gametocytes of P. falciparum strain 3D7 in the plasma of 200 Gambian children. The majority of children had been identified as carrying gametocytes after treatment for malaria, and each donated blood for mosquito-feeding experiments. None of the plasma recognised the surface of erythrocytes infected with developmental stages of gametocytes (I-IV), but 66 of 194 (34.0%) plasma contained IgG that recognised the surface of erythrocytes infected with mature (stage V) gametocytes. Thirty-four (17.0%) of 200 plasma tested recognised erythrocytes infected with trophozoites and schizonts, but there was no association with recognition of the surface of gametocyte-infected erythrocytes (odds ratio 1.08, 95% C.I. 0.434-2.57; P = 0.851). Plasma antibodies with the ability to recognise gametocyte surface antigens (GSA) were associated with the presence of antibodies that recognise the gamete antigen Pfs 230, but not Pfs48/45. Antibodies recognising GSA were associated with donors having lower gametocyte densities 4 weeks after antimalarial treatment.<h4>Conclusions/significance</h4>We provide evidence that GSA are distinct from antigens detected on the surface of asexual 3D7 parasites. Our findings suggest a novel strategy for the development of transmission-blocking vaccines.Maha SaeedWill RoeffenNeal AlexanderChristopher J DrakeleyGeoffrey A T TargettColin J SutherlandPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 5, p e2280 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maha Saeed Will Roeffen Neal Alexander Christopher J Drakeley Geoffrey A T Targett Colin J Sutherland Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
description	<h4>Background</h4>The asexual blood stages of the human malaria parasite Plasmodium falciparum produce highly immunogenic polymorphic antigens that are expressed on the surface of the host cell. In contrast, few studies have examined the surface of the gametocyte-infected erythrocyte.<h4>Methodology/principal findings</h4>We used flow cytometry to detect antibodies recognising the surface of live cultured erythrocytes infected with gametocytes of P. falciparum strain 3D7 in the plasma of 200 Gambian children. The majority of children had been identified as carrying gametocytes after treatment for malaria, and each donated blood for mosquito-feeding experiments. None of the plasma recognised the surface of erythrocytes infected with developmental stages of gametocytes (I-IV), but 66 of 194 (34.0%) plasma contained IgG that recognised the surface of erythrocytes infected with mature (stage V) gametocytes. Thirty-four (17.0%) of 200 plasma tested recognised erythrocytes infected with trophozoites and schizonts, but there was no association with recognition of the surface of gametocyte-infected erythrocytes (odds ratio 1.08, 95% C.I. 0.434-2.57; P = 0.851). Plasma antibodies with the ability to recognise gametocyte surface antigens (GSA) were associated with the presence of antibodies that recognise the gamete antigen Pfs 230, but not Pfs48/45. Antibodies recognising GSA were associated with donors having lower gametocyte densities 4 weeks after antimalarial treatment.<h4>Conclusions/significance</h4>We provide evidence that GSA are distinct from antigens detected on the surface of asexual 3D7 parasites. Our findings suggest a novel strategy for the development of transmission-blocking vaccines.
format	article
author	Maha Saeed Will Roeffen Neal Alexander Christopher J Drakeley Geoffrey A T Targett Colin J Sutherland
author_facet	Maha Saeed Will Roeffen Neal Alexander Christopher J Drakeley Geoffrey A T Targett Colin J Sutherland
author_sort	Maha Saeed
title	Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
title_short	Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
title_full	Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
title_fullStr	Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
title_full_unstemmed	Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
title_sort	plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/5141fbd8546e421c8806f6476ae35064
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Plasmodium falciparum antigens on the surface of the gametocyte-infected erythrocyte.

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