T(FH)-derived dopamine accelerates productive synapses in germinal centres.
T(FH)-derived dopamine accelerates productive synapses in germinal centres.
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DOI:
10.1038/nature23013
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发表时间:
2017-07-20
期刊:
影响因子:
64.8
通讯作者:
Vinuesa CG
中科院分区:
文献类型:
--
作者:
Papa I;Saliba D;Ponzoni M;Bustamante S;Canete PF;Gonzalez-Figueroa P;McNamara HA;Valvo S;Grimbaldeston M;Sweet RA;Vohra H;Cockburn IA;Meyer-Hermann M;Dustin ML;Doglioni C;Vinuesa CG
Protective high-affinity antibody responses depend on competitive selection of B cells carrying somatically mutated B-cell receptors by follicular helper T (TFH) cells in germinal centres. The rapid T-B-cell interactions that occur during this process are reminiscent of neural synaptic transmission pathways. Here we show that a proportion of human TFH cells contained dense-core granules marked by chromogranin B, which are normally found in neuronal presynaptic terminals storing catecholamines such as dopamine. TFH cells produce high amounts of dopamine and released it upon cognate interaction with B cells. Dopamine causes rapid translocation of intracellular ICOSL (inducible T-cell co-stimulator ligand, also known as ICOSLG) to the B-cell surface, which enhances accumulation of CD40L and chromogranin B granules at the human TFH cell synapse and increases the synapse area. Mathematical modelling suggests that faster dopamine-induced T-B-cell interactions increase total germinal centre output and accelerate it by days. Delivery of neurotransmitters across the T-B-cell synapse may be advantageous in the face of infection.
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