Abstract
We describe an immunoadhesin molecule containing intercellular adhesion molecule 1 (ICAM-1) molecularly fused to hinge and CH2 and CH3 domains of the human immunoglobulin G1 H chain that binds Plasmodium falciparum- infected erythrocytes. This receptor-based immunoadhesin is an effective and specific inhibitor of P. falciparum-infected erythrocyte adhesion to ICAM-1-bearing surfaces, but does not inhibit leukocyte function antigen 1 (LFA-1) interaction with ICAM-1. Furthermore, the immunoadhesin promotes phagocytosis and destruction of parasitized erythrocytes by human monocytes. Each of these modes of action has potential for the therapy of malaria.
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