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Improving Human Immunity To Malaria

The deadliest form of is caused the protozoan Plasmodium falciparum. During its life-cycle in human blood, the parasite P. falciparum expresses unique proteins on the surface on . Antibodies to these proteins are associated with protection from malaria, however, the identity of surface protein(s) that elicit the strongest immune response is unknown.

Dr. and colleagues at the Walter and in Victoria, Australia have developed novel assays with transgenic P. falciparum expressing modified surface proteins, allowing the researchers to quantify to surface proteins among malaria-exposed children and adults. They found that most of the human antibody response to the surface proteins targets a parasite protein known as PfEMP1.

Moreover, they showed that people with PfEMP1-specific antibodies had a reduced risk of malaria symptoms, whereas antibodies to other surface antigens were not associated with protective immunity.

These findings suggest antibodies against PfEMP mediate human immunity to malaria and have implications for future .

TITLE: Targets of antibodies against Plasmodium falciparum-infected erythrocytes in malaria immunity

http://www.jci.org/articles/view/62182?key=ed28073b9acd36ff3e6e

Source

Journal of Clinical Investigation