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© Pierre Lafaye
Astrocytes marqués par des anticorps VHH anti-GFAP. Des anticorps d'alpagas dirigés contre une protéine spécifique des astrocytes, la GFAP (Glial Fibrillary Acidic Protein), ont été obtenus à partir de camélidés immunisés. La partie VHH (partie de l'anticorps qui reconnaît l'antigène) a été exprimée sous forme recombinante chez Escherichia coli.
Publication : Molecular immunology

Reproducing the immune response against the Plasmodium vivax merozoite surface protein 1 with mimotopes selected from a phage-displayed peptide library

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Molecular immunology - 01 Aug 1996

Demangel C, Lafaye P, Mazie JC

Link to Pubmed [PMID] – 8960114

Mol. Immunol. 1996 Aug;33(11-12):909-16

We have used phage display technology to identify peptides binding D14-3, a monoclonal antibody raised against the M(r) 42,000 C-terminal fragment of Plasmodium vivax merozoite surface protein 1 (PvMSP1). By screening a constrained hexapeptide library, seven independent clones binding D14-3 were isolated. The reactivity of D14-3 for these peptides was lower than for the natural antigen and the antibody binding was strictly associated with the viral context and the peptide conformation. Sequence analysis showed that five of them shared homology with the M(r) 42,000 C-terminal fragment (Pv42) and therefore appears to identify the D14-3 epitope. However, the other two peptides, while related to each other, did not correspond to any sequence in the Pv42 molecules. To evaluate their immunological interest, these phagotopes were injected into mice belonging to Balb/c, IC57BI/6 and Biozzi strains. All animals developed a strong immune response against phage particles but only Biozzi mice produced antibodies cross-reacting with Pv42. All phagotopes in Biozzi mice elicited a specific response against Pv42, even those sharing no sequence similarity with the antigen. Moreover, the avidities of these immune sera and the polyclonal response against Pv42 were comparable, suggesting phagotopes could be used as components of a subunit vaccine based on the C-terminal fragment of MSP1.

http://www.ncbi.nlm.nih.gov/pubmed/8960114