Volume 19, Issue 10 pp. 1823-1828
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A heat shock-like protein from the human malaria parasite plasmodium falciparum induces autoantibodies

Denise Mattei

Corresponding Author

Denise Mattei

Experimental Parasitology Unit, Institut Pasteur, Paris

Institut Pasteur, 25–28, rue du Docteur Roux, F-75724 Paris CEDEX 15, FranceSearch for more papers by this author
Artur Scherf

Artur Scherf

Experimental Parasitology Unit, Institut Pasteur, Paris

Recipient of an EMBO fellowship.

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Oliver Bensaude

Oliver Bensaude

Molecular Biology of Stress, Institut Pasteur, Paris

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Luiz Pereira Da Silva

Luiz Pereira Da Silva

Experimental Parasitology Unit, Institut Pasteur, Paris

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First published: October 1989
Citations: 72

Abstract

The humoral immune response to a 72-kDa heat shock-like protein of Plasmodium falciparum has been analyzed using mouse monoclonal antibodies (mAb) and human immune sera. Three regions of the molecule containing B cell epitopes were identified by screening a sublibrary encoding the COOH-terminal half of the antigen with the mAb. One B cell epitope mapped to a region poorly conserved between the parasite 72-kDa polypeptide and mammalian heat-shock proteins (Hsp 70). Another mAb, G10C9, reacted with an amino acid region that has a high degree of homology with mouse (87.5%) and human (81.2%) Hsp 70. Both mouse and human cells were recognized by this mAb when analyzed by indirect immunofluorescence and by two-dimensional immunoblots. Sera from humans infected with malaria also recognized the human Hsp 70. Thus, our results indicate that autoantibodies directed against host Hsp 70 can be induced by the homologous parasite protein.

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