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首页> 外文期刊>Cell Research >MEF2C mediates the activation induced cell death (AICD) of macrophages.
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MEF2C mediates the activation induced cell death (AICD) of macrophages.

机译:MEF2C介导巨噬细胞的激活诱导的细胞死亡(AICD)。

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摘要

Activation-induced cell death (AICD) of immune cells is widely believed to be crucial for the regulation of immune responses. Although macrophage apoptosis has been observed under a variety of pathological conditions, questions as to whether there is AICD of macrophages and how macrophage life span is regulated have not been well addressed. AICD in macrophages requires two signals. One is cell activation triggered by LPS or other bacterial components. The other is an event that exists in AICD-susceptible (primed) but not unsusceptible (resting) macrophages. Here we show that RAW264.7 cell is susceptible to LPS stimulation when it is primed with Salmonella typhimurium, type 5 adenovirus (Ad5) or IFN-gamma. We found that the stability of the transcription factor MEF2C is increased in primed RAW264.7 cell. Transfection of a dominant negative form of MEF2C protects primed macrophage from cell death triggered by LPS. Our data demonstrate that the increase of MEF2C protein stability is a key factor in the AICD of macrophage.Cell Research (2006) 16: 559-565. doi:10.1038/sj.cr.7310073; published online 15 June 2006.
机译:广泛认为免疫细胞的激活诱导的细胞死亡(AICD)对于调节免疫应答至关重要。尽管已经在多种病理条件下观察到巨噬细胞凋亡,但是关于巨噬细胞是否存在AICD以及如何调节巨噬细胞寿命的问题尚未得到很好的解决。巨噬细胞中的AICD需要两个信号。一种是由LPS或其他细菌成分触发的细胞活化。另一个事件是AICD易感(引发)但不易感(静止)巨噬细胞中存在的事件。在这里,我们显示RAW264.7细胞在用鼠伤寒沙门氏菌,5型腺病毒(Ad5)或IFN-γ引发时易受LPS刺激。我们发现转录的MEF2C的稳定性在引发的RAW264.7细胞中增加了。 MEF2C显性阴性形式的转染可保护引发的巨噬细胞免受LPS触发的细胞死亡。我们的数据表明,MEF2C蛋白稳定性的提高是巨噬细胞AICD的关键因素。CellResearch(2006)16:559-565。 doi:10.1038 / sj.cr.7310073; 2006年6月15日在线发布。

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