PLASMODIUM-FALCIPARUM - DIFFERENTIAL PARASITE REACTIVITY OF RABBIT ANTIBODIES TO REPEATED SEQUENCES IN THE ANTIGEN PF155/RESA

被引:9
|
作者
CARLSSON, J
UDOMSANGPETCH, R
WAHLIN, B
AHLBORG, N
BERZINS, K
PERLMANN, P
机构
[1] Department of Immunology, University of Stockholm
关键词
Malaria; human; Peptide reactivity; Pf155; Plasmodium falciparum; Protozoa; parasitic;
D O I
10.1016/0014-4894(90)90036-C
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
For selection of immunogens capable of inducing high levels of antibodies reactive with the Plasmodium falciparum antigen Pf155/RESA, rabbits were immunized with synthetic peptides corresponding to sequences based on the repeat subunits EENVEHDA and (EENV)2 from the C-terminus of this antigen. The antibodies obtained were analyzed with regard to binding to synthetic peptides in ELISA and to reactivity with parasite antigens by immunofluorescence or immunoblotting. All antisera reacted with both the peptides EENVEHDA and (EENV)2 as well as with Pf155/RESA. Antibody fractions specific for each of the two peptides were prepared by affinity chromatography on insolubilized peptides. Strong reactivity with antigens in the membrane of erythrocytes infected with early stages of the parasite as well as reactivity with Pf155/RESA in immunoblotting correlated with reactivity of antibody with (EENV)2. Antibody preparations reactive with EENVEHDA and depleted of (EENV)2 reactivity showed only a weak reactivity with Pf155/RESA but reacted also with P. falciparum polypeptides of 250, 210, and 88 kDa. In immunofluorescence, these antibodies stained mainly the intraerythrocytic parasite. Both EENVEHDA- and (EENV)2specific antibodies inhibited merozoite reinvasion in P. falciparum in vitro cultures, the latter antibodies being the most efficient. This study defines the specificity and crossreactivity with other P. falciparum antigens of antibodies to the C-terminal repeats of Pf155/RESA. © 1990.
引用
收藏
页码:314 / 325
页数:12
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