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It is believed that host immune factors may modulate CM outcomes and there is substantial evidence that cellular immune factors, such as cytokines, play an important role in this process. In this study, the potential relationship between the antibody responses to the merozoite surface protein (MSP)-1 complex (which consists of four fragments namely: MSP-1<jats:sub>83<\/jats:sub>, MSP-1<jats:sub>30<\/jats:sub>, MSP-1<jats:sub>38<\/jats:sub>and MSP-1<jats:sub>42<\/jats:sub>), MSP-6<jats:sub>36<\/jats:sub>and MSP-7<jats:sub>22<\/jats:sub>and CM was investigated.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Peripheral blood antibody responses to recombinant antigens of the two major allelic forms of MSP-1 complex, MSP-6<jats:sub>36<\/jats:sub>and MSP-7<jats:sub>22<\/jats:sub>were compared between healthy subjects, mild malaria patients (MM) and CM patients residing in a malaria endemic region of central India. Total IgG and IgG subclass antibody responses were determined using ELISA method.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The prevalence and levels of IgG and its subclasses in the plasma varied for each antigen. In general, the prevalence of total IgG, IgG1 and IgG3 was higher in the MM patients and lower in CM patients compared to healthy controls. Significantly lower levels of total IgG antibodies to the MSP-1<jats:sub>f38<\/jats:sub>, IgG1 levels to MSP-1<jats:sub>d83<\/jats:sub>, MSP-1<jats:sub>19<\/jats:sub>and MSP-6<jats:sub>36<\/jats:sub>and IgG3 levels to MSP-1<jats:sub>f42<\/jats:sub>and MSP-7<jats:sub>22<\/jats:sub>were observed in CM patients as compared to MM patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>These results suggest that there may be some dysregulation in the generation of antibody responses to some MSP antigens in CM patients and it is worth investigating further whether perturbations of antibody responses in CM patients contribute to pathogenesis.<\/jats:p><\/jats:sec>","DOI":"10.1186\/1475-2875-7-121","type":"journal-article","created":{"date-parts":[[2008,7,4]],"date-time":"2008-07-04T18:13:47Z","timestamp":1215195227000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Antibody responses to the merozoite surface protein-1 complex in cerebral malaria patients in India"],"prefix":"10.1186","volume":"7","author":[{"given":"Naomi W","family":"Lucchi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jon Eric","family":"Tongren","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vidhan","family":"Jain","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Avinash C","family":"Nagpal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian W","family":"Kauth","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ute","family":"Woehlbier","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hermann","family":"Bujard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aditya P","family":"Dash","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Neeru","family":"Singh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan K","family":"Stiles","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Venkatachalam","family":"Udhayakumar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2008,7,4]]},"reference":[{"key":"596_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/S0163-7258(98)00008-4","volume":"79","author":"CR Newton","year":"1998","unstructured":"Newton CR, Krishna S: Severe falciparum malaria in children: current understanding of pathophysiology and supportive treatment. 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