A complex of Neuroplastin and Plasma Membrane Ca(2+) ATPase controls T cell activation.

A complex of Neuroplastin and Plasma Membrane Ca(2+) ATPase controls T cell activation.
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神经塑料和质膜Ca(2+)ATPase的复合物控制T细胞激活。

DOI:
10.1038/s41598-017-08519-4
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发表时间:
2017-08-21
期刊:
影响因子:
4.6
通讯作者:
Thomas U
Thomas U
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Korthals M;Langnaese K;Smalla KH;Kähne T;Herrera-Molina R;Handschuh J;Lehmann AC;Mamula D;Naumann M;Seidenbecher C;Zuschratter W;Tedford K;Gundelfinger ED;Montag D;Fischer KD;Thomas U

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The outcome of T cell activation is determined by mechanisms that balance Ca2+ influx and clearance. Here we report that murine CD4 T cells lacking Neuroplastin (Nptn −/−), an immunoglobulin superfamily protein, display elevated cytosolic Ca2+ and impaired post-stimulation Ca2+ clearance, along with increased nuclear levels of NFAT transcription factor and enhanced T cell receptor-induced cytokine production. On the molecular level, we identified plasma membrane Ca2+ ATPases (PMCAs) as the main interaction partners of Neuroplastin. PMCA levels were reduced by over 70% in Nptn −/− T cells, suggesting an explanation for altered Ca2+ handling. Supporting this, Ca2+ extrusion was impaired while Ca2+ levels in internal stores were increased. T cells heterozygous for PMCA1 mimicked the phenotype of Nptn −/− T cells. Consistent with sustained Ca2+ levels, differentiation of Nptn −/− T helper cells was biased towards the Th1 versus Th2 subset. Our study thus establishes Neuroplastin-PMCA modules as important regulators of T cell activation.
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