We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Characterization of a differential immunoscreen epitope of Plasmodium falciparum using combinatorial agents.
- Authors
Singh, Nevil J.; Sehgal, Alfica; Sharma, Shobhona
- Abstract
A differential serological screening of a λgtll cDNA expression library has identified several clones, which react exclusively to sera samples from persons clinically immune to malaria but not to acute malaria patient sera. One such clone, IPf9, has a 315-bp cDNA insert, which was found to be conserved in different strains of the human and rodent malarial parasite Plasmodium falciparum and Plasmodium berghei, respectively. The induced expression product of IPf9 was used to generate polyclonal sera in rabbits. The IPf9 expression product was also screened with phage surface display combinatorial libraries to isolate reagents that specifically bound to the IPf9 product. The polyclonal antisera and the combinatorial reagents recognized a 50-kDa protein from P. falciparum, and a 53-kDa product from P. berghei. Immunofluorescence studies using asexual and sexual stages of P. falciparum showed the protein to be present within the parasite in each of the asexual and sexual stages. The combinatorial reagents showed a partial inhibition in the growth of P. falciparum in vitro. Mice infected with the P. berghei showed the presence of T-cells that exhibited lymphoproliferation when stimulated with the IPf9 protein. It is suggested that IPf9 protein is a conserved protein epitope, and may be relevant for a protective immune response to malaria.
- Subjects
PLASMODIUM falciparum; EPITOPES; IMMUNOLOGY
- Publication
Parasite Immunology, 2000, Vol 22, Issue 7, p333
- ISSN
0141-9838
- Publication type
Article
- DOI
10.1046/j.1365-3024.2000.00310.x