[Screening and preliminary identification of mimetic peptides of Plasmodium falciparum-infected erythrocyte membrane surface protein 1].
OBJECTIVE
To screen and identify mimetic peptides of Plasmodium falciparun-infected erythrocyte membrane surface protein 1 in order to explore anti-adhesive agent against cerebral malaria.


METHODS
Phage-borne peptide KLYLIAEGSVAA was used as panning targets to select target binders in a disulfide-constrained heptapeptides library. Three rounds of biopanning were carried out and then ELISA and competitive ELISA were used to evaluate the binding character between phage-borne peptides and ICAM-1. The insert DNA sequences of positive clones were determined and their amino acid sequences were deduced.


RESULTS
After three-round panning, 22 clones were randomly chosen from the third panning and analyzed. Three clones showed positive interaction with ICAM-1, and two of them possessed the amino acid sequence C-ITAVPVR-C, the other one was C-DIMGGYN-C. These peptides specifically inhibited the binding of 15.2 antibody to ICAM-1 detected by competitive ELISA.


CONCLUSIONS
Two kinds of mimetic peptides of PfEMP-1 have been obtained, which can bind with ICAM-1 specifically.
Hao
Wen-bo
WB
Tropical Disease Department, the Southern Medical University, Guangzhou 510515, China.
Li
Ming
M
Xu
Wei-wen
WW
Wang
Ping
P
Chen
Bai-hong
BH
D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000378:metabolism; D001665:Binding Sites; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D018716:Molecular Mimicry; D019151:Peptide Library; D010455:Peptides / Q000737:chemistry* / Q000378:metabolism; D010963:Plasmodium falciparum; D015800:Protozoan Proteins / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid
D000911:Antibodies, Monoclonal; D000939:Epitopes; D019151:Peptide Library; D010455:Peptides; D015800:Protozoan Proteins; C085731:erythrocyte membrane protein 1, Plasmodium falciparum; D018799:Intercellular Adhesion Molecule-1