| Autor: |
Stephens, Robin, Albano, Frank R., Quin, Stuart, Pascal, Benjamin J., Harrison, Vicky, Stockinger, Brigitta, Kioussis, Dimitris, Weltzien, Hans-Ulrich, Langhorne, Jean |
| Zdroj: |
Blood; September 2005, Vol. 106 Issue: 5 p1676-1684, 9p |
| Abstrakt: |
T cells are important in the immune response to malaria, both for their cytokines and their help for antibody production. To look at the relative importance of these roles, a T-cell receptor (TCR) transgenic mouse has been generated carrying a TCR specific for an epitope of the merozoite surface protein 1 (MSP-1) of the malaria parasite, Plasmodium chabaudi. In adoptive transfer experiments, malaria-specific CD4+T cells expand and produce interferon γ (IFN-γ) early in infection, but the population contracts quickly despite prolonged persistence of the parasite. MSP-1-specific CD4+cells can protect immunodeficient mice from lethal infection; however, the parasite is only completely cleared in the presence of B cells showing that T helper cells are critical. Levels of malaria-specific antibody and the speed of their production clearly correlate with the time of resolution of infection, indicating that a critical threshold of antibody production is required for parasite clearance. Furthermore, T cells specific for a shed portion of MSP-1 are able to provide help for antibody to the protective region, which remains bound to the infected erythrocyte, suggesting that MSP-1 has all of the components necessary for a good vaccine. (Blood. 2005;106:1676-1684) |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
