Eur J Immunol. 1990 Jul;20(7):1445-9.

A malaria heat-shock-like determinant expressed on the infected hepatocyte surface is the target of antibody-dependent cell-mediated cytotoxic mechanisms by nonparenchymal liver cells.

Rénia L, Mattei D, Goma J, Pied S, Dubois P, Miltgen F, Nüssler A, Matile H, Menégaux F, Gentilini M, et al.

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INSERM U 313, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.

Abstract

Cultured hepatic stages of Plasmodium falciparum and P. yoelii and with a monoclonal antibody recognizing a C-terminal fragment of the P. falciparum heat-shock-like protein (Pfhsp70) revealed that synthesis of this antigen first occurs during intrahepatic development of the parasite, at the two nuclei stage. Using a variety of techniques, including scanning electron microscopy, we observed that this antigenic determinant was expressed on the infected hepatocyte membrane. Its participation in antibody-dependent cell-mediated cytotoxicity was investigated. While no effect was obtained with peripheral blood cells, we found that 25% of the schizonts were specifically lysed when using spleen cells at a killer/target ratio of 30/1. More interestingly, with nonparenchymal liver cells, up to 50% of the hepatic parasites disappeared with a killer/target ratio of 10/1.

PMID:: 2201546; [PubMed - indexed for MEDLINE]

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A malaria heat-shock-like determinant expressed on the infected hepatocyte surface is the target of antibody-dependent cell-mediated cytotoxic mechanisms by nonparenchymal liver cells.

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