Spatiotemporal resolution of Ca2+ signaling events by real time imaging of single B cells

Spatiotemporal resolution of Ca2+ signaling events by real time imaging of single B cells
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通过单个 B 细胞的实时成像对 Ca2 信号传导事件进行时空分辨率

DOI:
10.1016/j.febslet.2012.03.057
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发表时间:
2012
期刊:
影响因子:
3.5
通讯作者:
Wienands J
Wienands J
中科院分区:
生物学3区
文献类型:
--
作者:
Junek S;Engelke M;Schild D;Wienands J

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抗原诱导的B细胞活化需要Ca2+第二信使的动员。该过程与B细胞抗原受体的信号效应蛋白如衔接蛋白SLP65的亚细胞再定位有关。在这里,我们描述了一个广泛适用的活细胞成像方法,同时可视化细胞内的Ca2+通量的配置文件和易位的胞质信号蛋白质膜在真实的时间。我们的方法描绘了B细胞中Ca 2+信号事件的动力学层次,并揭示了各种细胞器对整体Ca 2+信号的及时有序贡献。开发的实验装置提供了一个有用的工具,以解决在各种受体信号系统的时空信号动力学。
Antigen-induced B cell activation requires mobilization of the Ca2+second messenger. This process is associated with the subcellular relocalization of signal effector proteins of the B cell antigen receptor such as the adaptor protein SLP65. Here we describe a broadly applicable live cell imaging method to simultaneously visualize intracellular Ca2+flux profiles and the translocation of cytosolic signaling proteins to the plasma membrane in real time. Our approach delineated the kinetic hierarchy of Ca2+signaling events in B cells and revealed a timely ordered contribution of various organelles to the overall Ca2+signal. The developed experimental setup provides a useful tool to resolve the spatiotemporal signaling dynamics in various receptor signaling systems.
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