Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.

<h4>Background</h4>Given the considerable geographic overlap in the endemic regions for malaria and tuberculosis, it is probable that co-infections with Mycobacterium tuberculosis and Plasmodium species are prevalent. Thus, it is quite likely that both malaria and TB vaccines may be used...

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Autores principales:	Marcela Parra, Steven C Derrick, Amy Yang, Jinhua Tian, Kristopher Kolibab, Miranda Oakley, Liyanage P Perera, William R Jacobs, Sanjai Kumar, Sheldon L Morris
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/df3c96438f09451bb3997b3c63abd179
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spelling	oai:doaj.org-article:df3c96438f09451bb3997b3c63abd1792021-11-18T07:31:53ZMalaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.1932-620310.1371/journal.pone.0028164https://doaj.org/article/df3c96438f09451bb3997b3c63abd1792011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22205939/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Given the considerable geographic overlap in the endemic regions for malaria and tuberculosis, it is probable that co-infections with Mycobacterium tuberculosis and Plasmodium species are prevalent. Thus, it is quite likely that both malaria and TB vaccines may be used in the same populations in endemic areas. While novel vaccines are currently being developed and tested individually against each of these pathogens, the efficacy of these vaccines has not been evaluated in co-infection models. To further assess the effectiveness of these new immunization strategies, we investigated whether co-infection with malaria would impact the anti-tuberculosis protection induced by four different types of TB vaccines in a mouse model of pulmonary tuberculosis.<h4>Principal findings</h4>Here we show that the anti-tuberculosis protective immunity induced by four different tuberculosis vaccines was not impacted by a concurrent infection with Plasmodium yoelii NL, a nonlethal form of murine malaria. After an aerogenic challenge with virulent M. tuberculosis, the lung bacterial burdens of vaccinated animals were not statistically different in malaria infected and malaria naïve mice. Multi-parameter flow cytometric analysis showed that the frequency and the median fluorescence intensities (MFI) for specific multifunctional T (MFT) cells expressing IFN-γ, TNF-α, and/or IL-2 were suppressed by the presence of malaria parasites at 2 weeks following the malaria infection but was not affected after parasite clearance at 7 and 10 weeks post-challenge with P. yoelii NL.<h4>Conclusions</h4>Our data indicate that the effectiveness of novel TB vaccines in protecting against tuberculosis was unaffected by a primary malaria co-infection in a mouse model of pulmonary tuberculosis. While the activities of specific MFT cell subsets were reduced at elevated levels of malaria parasitemia, the T cell suppression was short-lived. Our findings have important relevance in developing strategies for the deployment of new TB vaccines in malaria endemic areas.Marcela ParraSteven C DerrickAmy YangJinhua TianKristopher KolibabMiranda OakleyLiyanage P PereraWilliam R JacobsSanjai KumarSheldon L MorrisPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 12, p e28164 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marcela Parra Steven C Derrick Amy Yang Jinhua Tian Kristopher Kolibab Miranda Oakley Liyanage P Perera William R Jacobs Sanjai Kumar Sheldon L Morris Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
description	<h4>Background</h4>Given the considerable geographic overlap in the endemic regions for malaria and tuberculosis, it is probable that co-infections with Mycobacterium tuberculosis and Plasmodium species are prevalent. Thus, it is quite likely that both malaria and TB vaccines may be used in the same populations in endemic areas. While novel vaccines are currently being developed and tested individually against each of these pathogens, the efficacy of these vaccines has not been evaluated in co-infection models. To further assess the effectiveness of these new immunization strategies, we investigated whether co-infection with malaria would impact the anti-tuberculosis protection induced by four different types of TB vaccines in a mouse model of pulmonary tuberculosis.<h4>Principal findings</h4>Here we show that the anti-tuberculosis protective immunity induced by four different tuberculosis vaccines was not impacted by a concurrent infection with Plasmodium yoelii NL, a nonlethal form of murine malaria. After an aerogenic challenge with virulent M. tuberculosis, the lung bacterial burdens of vaccinated animals were not statistically different in malaria infected and malaria naïve mice. Multi-parameter flow cytometric analysis showed that the frequency and the median fluorescence intensities (MFI) for specific multifunctional T (MFT) cells expressing IFN-γ, TNF-α, and/or IL-2 were suppressed by the presence of malaria parasites at 2 weeks following the malaria infection but was not affected after parasite clearance at 7 and 10 weeks post-challenge with P. yoelii NL.<h4>Conclusions</h4>Our data indicate that the effectiveness of novel TB vaccines in protecting against tuberculosis was unaffected by a primary malaria co-infection in a mouse model of pulmonary tuberculosis. While the activities of specific MFT cell subsets were reduced at elevated levels of malaria parasitemia, the T cell suppression was short-lived. Our findings have important relevance in developing strategies for the deployment of new TB vaccines in malaria endemic areas.
format	article
author	Marcela Parra Steven C Derrick Amy Yang Jinhua Tian Kristopher Kolibab Miranda Oakley Liyanage P Perera William R Jacobs Sanjai Kumar Sheldon L Morris
author_facet	Marcela Parra Steven C Derrick Amy Yang Jinhua Tian Kristopher Kolibab Miranda Oakley Liyanage P Perera William R Jacobs Sanjai Kumar Sheldon L Morris
author_sort	Marcela Parra
title	Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
title_short	Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
title_full	Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
title_fullStr	Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
title_full_unstemmed	Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
title_sort	malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/df3c96438f09451bb3997b3c63abd179
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Malaria infections do not compromise vaccine-induced immunity against tuberculosis in mice.

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