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首页> 外文期刊>Cellular immunology >P2X7 receptor expression levels determine lethal effects of a purine based danger signal in T lymphocytes.
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P2X7 receptor expression levels determine lethal effects of a purine based danger signal in T lymphocytes.

机译:P2X7受体的表达水平决定了T淋巴细胞中基于嘌呤的危险信号的致死作用。

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摘要

Contact of T lymphocytes with nicotinamide adenine dinucleotide (NAD) or ATP causes cell death that requires expression of purinergic receptor P2X(7) (P2X(7)R). T cell subsets differ in their responses to NAD and ATP, which awaits a mechanistic explanation. Here, we show that sensitivity to ATP correlates with P2X(7)R expression levels in CD4 cells, CD8 cells and CD4(+)CD25(+) cells from both C57BL/6 and BALB/c mice. But P2X(7)R ligands do not only induce cell death but also shedding of CD62L. It is shown here that in CD62L(high) T cells, CD62L shedding correlates with low expression of P2X(7)Rs and lower cell death, whereas in CD62L(low) cells P2X(7)R expression and death are higher. The possibility is therefore investigated that P2X(7)Rs induce T cell activation. Experiments show that spontaneous T cell proliferation is somewhat higher in cells expressing P2X(7)Rs, but this effect we suggest is caused by P2X(7)R expression on accessory cells.
机译:T淋巴细胞与烟酰胺腺嘌呤二核苷酸(NAD)或ATP接触会导致细胞死亡,需要表达嘌呤能受体P2X(7)(P2X(7)R)。 T细胞亚群对NAD和ATP的反应有所不同,这需要机械解释。在这里,我们显示对ATP的敏感性与C57BL / 6和BALB / c小鼠的CD4细胞,CD8细胞和CD4(+)CD25(+)细胞中P2X(7)R表达水平相关。但是P2X(7)R配体不仅诱导细胞死亡,而且还脱落CD62L。此处显示在CD62L(高)T细胞中,CD62L脱落与P2X(7)Rs的低表达和较低的细胞死亡相关,而在CD62L(低)细胞中,P2X(7)R的表达和死亡较高。因此,研究了P2X(7)Rs诱导T细胞活化的可能性。实验表明,在表达P2X(7)Rs的细胞中自发性T细胞增殖更高,但我们认为这种效应是由P2X(7)R在辅助细胞上的表达引起的。

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