Molecular cloning and characterisation of the RESA gene, a marker of genetic diversity of Plasmodium falciparum

To identity immunodiagnostic antigen genes, a Plasmodium falciparum (Dd2 clone) expression library was screened using human immune sera. The ring-infected erythrocyte surface antigen (RESA) was isolated: this antigen of the resistant clone presents repeat tandem sequences like the 3D7 clone, albeit...

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Detalles Bibliográficos
Autores principales: Moyano, Eva M., González, Luis Miguel, Cuevas, Laureano, Perez-Pastrana, Esperanza, Santa-Maria, Ysmael, Benito, Agustín
Formato: Texto
Lenguaje:English
Publicado: Springer Netherlands 2009
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2900597/
https://www.ncbi.nlm.nih.gov/pubmed/19816792
http://dx.doi.org/10.1007/s11033-009-9849-z
Descripción
Sumario:To identity immunodiagnostic antigen genes, a Plasmodium falciparum (Dd2 clone) expression library was screened using human immune sera. The ring-infected erythrocyte surface antigen (RESA) was isolated: this antigen of the resistant clone presents repeat tandem sequences like the 3D7 clone, albeit in different numbers. RESA has been studied as a marker of genetic diversity, with different sizes being observed in different isolates and clones of Plasmodium falciparum. The native protein was localised in cultures by western-blot and immuno-transmission electron microscopy. The antigenicity of RESA was evaluated by ELISA, using the carboxy-terminal repeat region as antigen. The assay’s sensitivity and specificity were 78.2 and 94% respectively.

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