Effector Vγ9Vδ2 T cell response to congenital Toxoplasma gondii infection.
Effector Vγ9Vδ2 T cell response to congenital Toxoplasma gondii infection.
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DOI:
10.1172/jci.insight.138066
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发表时间:
2021-08-23
期刊:
影响因子:
8
通讯作者:
Vermijlen D
中科院分区:
文献类型:
--
作者:
Ma L;Papadopoulou M;Taton M;Genco F;Marchant A;Meroni V;Vermijlen D
A major γδ T cell population in human adult blood are the Vγ9Vδ2 T cells that are activated and expanded in a TCR-dependent manner by microbe-derived and endogenously derived phosphorylated prenyl metabolites (phosphoantigens). Vγ9Vδ2 T cells are also abundant in human fetal peripheral blood, but compared with their adult counterparts they have a distinct developmental origin, are hyporesponsive toward in vitro phosphoantigen exposure, and do not possess a cytotoxic effector phenotype. In order to obtain insight into the role of Vγ9Vδ2 T cells in the human fetus, we investigated their response to in utero infection with the phosphoantigen-producing parasite Toxoplasma gondii (T. gondii). Vγ9Vδ2 T cells expanded strongly when faced with congenital T. gondii infection, which was associated with differentiation toward potent cytotoxic effector cells. The Vγ9Vδ2 T cell expansion in utero resulted in a fetal footprint with public germline-encoded clonotypes in the Vγ9Vδ2 TCR repertoire 2 months after birth. Overall, our data indicate that the human fetus, from early gestation onward, possesses public Vγ9Vδ2 T cells that acquire effector functions following parasite infections.
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Hayday AC
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影响因子:
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通讯作者:
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