High-Throughput Antibody Profiling Identifies Targets of Protective Immunity against P. falciparum Malaria in Thailand

被引:2
作者
Hassan, Ifra [1 ]
Kanoi, Bernard N. [2 ]
Nagaoka, Hikaru [1 ]
Sattabongkot, Jetsumon [3 ]
Udomsangpetch, Rachanee [4 ]
Tsuboi, Takafumi [5 ]
Takashima, Eizo [1 ]
机构
[1] Ehime Univ, Proteo Sci Ctr, Div Malaria Res, Matsuyama 7908577, Japan
[2] Mt Kenya Univ, Inst Trop Med, Ctr Malaria Eliminat, Thika 01000, Kenya
[3] Mahidol Univ, Fac Trop Med, Mahidol Vivax Res Unit, Bangkok 10400, Thailand
[4] Mahidol Univ, Fac Med Technol, Ctr Res & Innovat, Nakhon Pathom 73170, Thailand
[5] Ehime Univ, Proteo Sci Ctr, Div Cell Free Sci, Matsuyama 7908577, Japan
关键词
malaria; wheat germ cell-free system; immunoscreening; AlphaScreen; PLASMODIUM-FALCIPARUM; PROTEINS; BINDING;
D O I
10.3390/biom13081267
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Malaria poses a significant global health challenge, resulting in approximately 600,000 deaths each year. Individuals living in regions with endemic malaria have the potential to develop partial immunity, thanks in part to the presence of anti-plasmodium antibodies. As efforts are made to optimize and implement strategies to reduce malaria transmission and ultimately eliminate the disease, it is crucial to understand how these interventions impact naturally acquired protective immunity. To shed light on this, our study focused on assessing antibody responses to a carefully curated library of P. falciparum recombinant proteins (n = 691) using samples collected from individuals residing in a low-malaria-transmission region of Thailand. We conducted the antibody assays using the AlphaScreen system, a high-throughput homogeneous proximity-based bead assay that detects protein interactions. We observed that out of the 691 variable surface and merozoite stage proteins included in the library, antibodies to 268 antigens significantly correlated with the absence of symptomatic malaria in an univariate analysis. Notably, the most prominent antigens identified were P. falciparum erythrocyte membrane protein 1 (PfEMP1) domains. These results align with our previous research conducted in Uganda, suggesting that similar antigens like PfEMP1s might play a pivotal role in determining infection outcomes in diverse populations. To further our understanding, it remains critical to conduct functional characterization of these identified proteins, exploring their potential as correlates of protection or as targets for vaccine development.
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页数:13
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