Multiple antigen peptides for specific detection of antibodies to a malaria antigen in human sera.

Abstract:

:Multiple antigen peptides (MAP), consisting of a number of peptide copies synthesized on a branching lysyl core, offer a novel approach for rendering small peptides immunoreactive in solid-phase immunoassays. An octameric MAP, carrying 6 repeats of the sequence -N-A-A-G-, tandem repeated in the immunodominant region of the circumsporozoite (CS) protein of Plasmodium malariae, was used as a model to evaluate the suitability of the MAP system in an indirect enzyme-linked immunosorbent assay (ELISA) for detecting antibodies against a parasite antigen in individuals exposed to natural infection. The reaction of endemic sera in ELISA on MAP8-(NAAG)6 was related to that obtained in immunofluorescence on sporozoites, indicating the specificity of the antibody-MAP interaction. The reactivity of immune sera was found to be directed only against the (NAAG)6 moiety of the MAP and not against the lysyl core, since antibody binding to MAP8-(NAAG)6 was completely inhibited by (NAAG)6-NA monomer, but remained uninfluenced when lysyl core was used as competing ligand. The levels of antibodies to MAP8-(NAAG)6, in two groups of individuals naturally exposed to malaria infection, appeared to be related to their respective exposure to the parasite.

journal_name

Immunol Lett

journal_title

Immunology letters

authors

Habluetzel A,Pessi A,Bianchi E,Rotigliano G,Esposito F

doi

10.1016/0165-2478(91)90092-o

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

75-80

issue

1

eissn

0165-2478

issn

1879-0542

pii

0165-2478(91)90092-O

journal_volume

30

pub_type

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