[Identification of the binding site on ICAM-1 for red blood cells infected by Plasmodium falciparum].
Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi
; 20(3): 129-32, 2002.
Article
em Zh
| MEDLINE
| ID: mdl-12567980
ABSTRACT
OBJECTIVE:
To identify the binding site on ICAM-1 to PRBCs in order to explore anti-adhesive agent against cerebral malaria.METHODS:
Monoclonal antibody 15.2 against ICAM-1 domain 1 was chosen as target molecule to screen mimetic peptides of ICAM-1 from a 12-mer random peptide library. Three rounds of biopanning were carried out and then ELISA, competitive ELISA, dot-ELISA and Western blotting were used to evaluate the binding character between phage-borne peptides and McAb 15.2. The insert DNA sequences of positive clones were determined and their amino acid sequences were deduced.RESULTS:
Thirty clones from the third round were randomly selected, and 26 of them were found positive by sandwich ELISA. The competitive ELISA test proved that most phage-borne peptides could competitively inhibit the binding of antibody (15.2 McAb) with ICAM-1. Analysis of DNA and amino acid sequences indicated that over a half positive phage clones expressed 12-mer peptide KLYLIAEGSVAA. Comparison of peptide K(XX) L(XXX) GSV with the 64-73 aa of primary sequence of ICAM-1 showed a 50% homogeneity.CONCLUSION:
These peptides displayed by phage may be analogs of ICAM-1, K..L...GSV probably plays a significant role on the binding reaction of ICAM-1 and PRBCs.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Plasmodium falciparum
/
Molécula 1 de Adesão Intercelular
/
Eritrócitos
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
Zh
Revista:
Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi
Assunto da revista:
PARASITOLOGIA
Ano de publicação:
2002
Tipo de documento:
Article