ArticlebioRxiv : the preprint server for biology2024
Potent AMA1-specific human monoclonal antibody against P. vivax Pre-erythrocytic and Blood Stages.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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28 authors at 9 institutions in 4 countries.
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Abstract
New therapeutics are necessary for preventing Plasmodium vivax malaria due to easy transmissibility and dormancy in the liver that increases the clinical burden due to recurrent relapse. We isolated 12 Pv Apical Membrane Antigen 1 (PvAMA1) specific human monoclonal antibodies from Peripheral Blood Mononuclear Cells of a Pv exposed individual. PvAMA1 is essential for sporozoite and merozoite invasion, making it a unique therapeutic target. HumAb 826827 blocked the invasion of human erythrocytes using Pv clinical isolates and inhibited sporozoite invasion of human hepatocytes in vitro (IC50 of 0.3 to 3.7 ug/mL). It also significantly reduced liver infection of chimeric FRG humHep mice in vivo. The crystal structure of rPvAMA1 bound to 826827 shows that 826827 partially occupies the highly conserved hydrophobic groove in PvAMA1 that binds its known receptor, RON2. We have isolated a potent humAb that is isolate transcendent, blocks both pre erythrocytic and blood stage infection, and could be a new therapy for Pv.
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