Zinc activates damage-sensing TRPA1 ion channels.
Zinc activates damage-sensing TRPA1 ion channels.
复制标题
锌激活损伤感应TRPA1离子通道。
DOI:
10.1038/nchembio.146
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发表时间:
2009-03
影响因子:
14.8
通讯作者:
Patapoutian, Ardem
中科院分区:
文献类型:
--
作者:
Hu, Hongzhen;Bandell, Michael;Petrus, Matt J.;Zhu, Michael X.;Patapoutian, Ardem
Zinc is an essential biological trace element. It is required for the structure or function of over 300 proteins, and is increasingly recognized for its role in cell signaling. However, high concentrations of zinc have cytotoxic effects, and overexposure to zinc can cause pain and inflammation through unknown mechanisms. Here we show that zinc excites nociceptive somatosensory neurons and causes nociception in mice through TRPA1, a cation channel previously shown to mediate the pungency of wasabi and cinnamon through cysteine-modification. Zinc activates TRPA1 through a novel mechanism that requires zinc influx through TRPA1 channels and subsequent activation via specific intracellular cysteine and histidine residues. TRPA1 is highly sensitive to intracellular zinc, as low nanomolar concentrations activate TRPA1 and modulate its sensitivity. These findings identify TRPA1 as a major target for the sensory effects of zinc, and support an emerging role for zinc as a signaling molecule that can modulate sensory transmission.
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