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Response to conserved epitope linked to protection from malaria.

Vaccine Weekly

| June 02, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 JUN 2 - (NewsRx.com & NewsRx.net) -- A CD4+ T-cell immune response to a conserved epitope in the circumsporozoite protein correlates with protection from natural Plasmodium falciparum infection and disease.

According to a study from an international team of researchers, "Many human T-cell responses specific for epitopes in Plasmodium falciparum have been described, but none has yet been shown to be predictive of protection against natural malaria infection. Here we report a peptide-specific T-cell assay that is strongly associated with protection of humans in The Gambia, West Africa, from both malaria infection and disease.

"The assay detects interferon-gamma-secreting CD4+ T cells specific for a conserved sequence from the circumsporozoite protein, which binds to many human leukocyte antigen (HLA)-DR types," said William H. H. Reece at the University of Oxford and collaborators in England, Belgium, Gambia, and the United States. "The correlation was observed using a cultured, rather than an ex vivo, ELISPOT assay that measures central memory-type T cells rather than activated effector T cells. These findings ...

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Source: HighBeam Research, Response to conserved epitope linked to protection from malaria.

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