Pattern of humoral immune response to Plasmodium falciparum blood stages in individuals presenting different clinical expressions of malaria

作者: Fabiana MS Leoratti , Rui R Durlacher , Marcus VG Lacerda , Maria G Alecrim , Antonio W Ferreira

DOI: 10.1186/1475-2875-7-186

关键词:

摘要: Background: The development of protective immunity against malaria is slow and to be maintained, it requires exposure multiple antigenic variants parasites age-associated maturation the immune system. Evidence that associated with different classes subclasses antibodies reveals importance considering quality response. In this study, we have evaluated humoral response Plasmodium falciparum blood stages individuals naturally exposed who live in endemic areas Brazil order assess prevalence specific isotypes their association clinical expressions. Methods: Different P. stages, IgG, IgG1, IgG2, IgG3, IgG4, IgM, IgE IgA, were determined by ELISA. results based on analysis expressions (complicated, uncomplicated asymptomatic) factors related prior such as age number previous attacks. occurrence H131 polymorphism FcγIIA receptor was also investigated part studied population. Results: highest levels IgG2 IgG3 observed asymptomatic malaria, while IgM predominant among complicated malaria. Individuals reporting more than five attacks presented a predominance antibodies, IgA predominated or less Among there high-avidity low-avidity antibodies. found 44.4% individuals, allele, suggesting role Conclusion: Together, suggest differential regulation anti-P. antibody pattern showed even unstable transmission areas, can observed, when appropriated are produced.

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