Therapeutic blockade of PD-L1 and LAG-3 rapidly clears established blood-stage Plasmodium infection.

Therapeutic blockade of PD-L1 and LAG-3 rapidly clears established blood-stage Plasmodium infection.
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DOI:
10.1038/ni.2180
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发表时间:
2011-12-11
期刊:
影响因子:
30.5
通讯作者:
Harty, John T.
Harty, John T.
中科院分区:
医学1区
文献类型:
--
作者:
Butler, Noah S.;Moebius, Jacqueline;Pewe, Lecia L.;Traore, Boubacar;Doumbo, Ogobara K.;Tygrett, Lorraine T.;Waldschmidt, Thomas J.;Crompton, Peter D.;Harty, John T.

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Plasmodium infection of erythrocytes induces clinical malaria. Parasite-specific CD4+ T cells correlate with reduced parasite burdens and severity of human malaria, and are required to control blood-stage infection in mice. However, the characteristics of CD4+ T cells that determine protection or parasite persistence remain unknown. Here we show that P. falciparum infection of humans increased expression of an inhibitory receptor (PD-1) associated with T cell dysfunction. In vivo blockade of PD-L1 and LAG-3 restored CD4+ T cell function, amplified T follicular helper cell and germinal center B cell and plasmablast numbers, enhanced protective antibodies and rapidly cleared blood-stage malaria in mice. Thus, chronic malaria drives specific T cell dysfunction, which can be rescued to enhance parasite control using inhibitory therapies.
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