Journal article

Contribution of Functional Antimalarial Immunity to Measures of Parasite Clearance in Therapeutic Efficacy Studies of Artemisinin Derivatives

Katherine O'Flaherty, Ricardo Ataide, Sophie G Zaloumis, Elizabeth A Ashley, Rosanna Powell, Gaoqian Feng, Linda Reiling, Arjen M Dondorp, Nicholas P Day, Mehul Dhorda, Rick M Fairhurst, Pharath Lim, Chanaki Amaratunga, Sasithon Pukrittayakamee, Tinh Hien Tran, Ye Htut, Mayfong Mayxay, M Abul Faiz, James G Beeson, Francois Nosten Show all



BACKGROUND: Antibodies to the blood stages of malaria parasites enhance parasite clearance and antimalarial efficacy. The antibody subclass and functions that contribute to parasite clearance during antimalarial treatment and their relationship to malaria transmission intensity have not been characterized. METHODS: Levels of immunoglobulin G (IgG) subclasses and C1q fixation in response to Plasmodium falciparum merozoite antigens (erythrocyte-binding antigen [EBA] 175RIII-V, merozoite surface protein 2 [MSP-2], and MSP-142) and opsonic phagocytosis of merozoites were measured in a multinational trial assessing the efficacy of artesunate therapy across 11 Southeast Asian sites. Regression ana..

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Awarded by National Health and Medical Research Council of Australia

Awarded by Australian Centre for Research Excellence in Malaria Elimination

Awarded by Australian Research Council

Awarded by Ramaciotti Foundation

Funding Acknowledgements

This work was supported by the National Health and Medical Research Council of Australia (project grant 1060785 [to F. J. I. F., J. A. S., and F. N.], program grant APP637406 [to J. G. B.], training fellowship 637396 [to F. J. I. F.], and senior research fellowships APP1077636 [to J. G. B.] and 1104975 [to J. A. S.]); the Australian Centre for Research Excellence in Malaria Elimination (1134989); the Australian Research Council (Future Fellowships FT130101122 [to F. J. I. F.] and FT0992317 [to J. G. B.]); the Ramaciotti Foundation (Establishment Grant 3245/2011); the Ian Potter Foundation (grant to F. J. I. F.); the Australian Commonwealth Government (Australian Government Research Training Program Scholarship to K. O.); the Victorian State Government (Operational Infrastructure Support grant); the United Kingdom Department for International Development, with additional support from the Worldwide Antimalarial Resistance Network, and the Intramural Research Program of the National Institute of Allergy and Infectious Diseases, National Institutes of Health; and the Wellcome Trust of Great Britain (support to the Wellcome Trust Mahidol Oxford Tropical Medicine Research Programme).