Photochemical activation of TRPA1 channels in neurons and animals.

Photochemical activation of TRPA1 channels in neurons and animals.
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DOI:
10.1038/nchembio.1183
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发表时间:
2013-04
影响因子:
14.8
通讯作者:
Peterson, Randall T.
Peterson, Randall T.
中科院分区:
生物学1区
文献类型:
--
作者:
Kokel, David;Cheung, Chung Yan J.;Mills, Robert;Coutinho-Budd, Jaeda;Huang, Liyi;Setola, Vincent;Sprague, Jared;Jin, Shan;Jin, Youngnam N.;Huang, Xi-Ping;Bruni, Giancarlo;Woolf, Clifford J.;Roth, Bryan L.;Hamblin, Michael R.;Zylka, Mark J.;Milan, David J.;Peterson, Randall T.

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Optogenetics is a powerful research tool because it enables high-resolution optical control of neuronal activity. However, current optogenetic approaches are limited to transgenic systems expressing microbial opsins and other exogenous photoreceptors. Here, we identify optovin, a small molecule that enables repeated photoactivation of motor behaviors in wild type animals. Surprisingly, optovin's behavioral effects are not visually mediated. Rather, photodetection is performed by sensory neurons expressing the cation channel TRPA1. TRPA1 is both necessary and sufficient for the optovin response. Optovin activates human TRPA1 via structure-dependent photochemical reactions with redox-sensitive cysteine residues. In animals with severed spinal cords, optovin treatment enables control of motor activity in the paralyzed extremities by localized illumination. These studies identify a light-based strategy for controlling endogenous TRPA1 receptors in vivo, with potential clinical and research applications in non-transgenic animals, including humans.
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