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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/721
Title: Suppression of Plasmodium falciparum by serum collected from a case of Plasmodium vivax infection
Authors: Nagao, Yoshiro
Kimura-Sato, Masako
Porntip Chavalitshewinkoon-Petmitr
พรทิพย์ เพ็ชรมิตร
Supatra Thongrungkiat
สุพัตรา ทองรุ่งเกียรติ
Polrat Wilairatana
พลรัตน์ วิไลรัตน์
Ishida, Takafumi
Peerapan Tan-ariya
Souza, J. Brian de
Srivicha Krudsood
ศรีวิชา ครุฑสูตร
Sornchai Looareesuwan
ศรชัย หลูอารีย์สุวรรณ
Mahidol University. Faculty of Tropical Medicine.
Nagao, Yoshiro
Keywords: Antibodies, Protozoan;Antigens, Protozoan;Cross Reactions;Plasmodium falciparum;Plasmodium vivax;Open Access article
Issue Date: 26-Jun-2008
Citation: Nagao Y, Kimura-Sato M, Chavalitshewinkoon-Petmitr P, Thongrungkiat S, Wilairatana P, Ishida T, et al. Suppression of Plasmodium falciparum by serum collected from a case of Plasmodium vivax infection. Malar J. 2008 Jun 26;7:113.
Abstract: BACKGROUND: It has frequently been reported that Plasmodium vivax suppressed Plasmodium falciparum and ameliorated disease severity in patients infected with these two species simultaneously. The authors investigate the hypothesis that immunological responses stimulated by P. vivax may play a role in suppressing co-infecting P. falciparum. METHODS: Sera, taken sequentially from one of the authors (YN) during experimental infection with P. vivax, were added to in vitro cultures of P. falciparum. Cross-reactive antibodies against P. falciparum antigens, and cytokines were measured in the sera. RESULTS: Significant growth inhibitory effects upon P. falciparum cultures (maximally 68% inhibition as compared to pre-illness average) were observed in the sera collected during an acute episode. Such inhibitory effects showed a strong positive temporal correlation with cross-reactive antibodies, especially IgM against P. falciparum schizont extract and, to a lesser degree, IgM against Merozoite Surface Protein (MSP)-119. Interleukin (IL)-12 showed the highest temporal correlation with P. vivax parasitaemia and with body temperatures in the volunteer. CONCLUSION: These results suggest the involvement by cross-reactive antibodies, especially IgM, in the interplay between plasmodial species. IL-12 may be one of direct mediators of fever induction by rupturing P. vivax schizonts, at least in some subjects. Future studies, preferably of epidemiological design, to reveal the association between cross-reactive IgM and cross-plasmodial interaction, are warranted.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/721
metadata.dc.identifier.url: http://www.malariajournal.com/content/7/1/113
ISSN: 1475-2875 (electronic)
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