Cold sensitivity of TRPA1 is unveiled by the prolyl hydroxylation blockade-induced sensitization to ROS

Takahito Miyake, Saki Nakamura, Meng Zhao, Kanako So, Keisuke Inoue, Tomohiro Numata, Nobuaki Takahashi, Hisashi Shirakawa, Yasuo Mori, Takayuki Nakagawa () and Shuji Kaneko
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Takahito Miyake: Graduate School of Pharmaceutical Sciences, Kyoto University
Saki Nakamura: Graduate School of Pharmaceutical Sciences, Kyoto University
Meng Zhao: Graduate School of Pharmaceutical Sciences, Kyoto University
Kanako So: Graduate School of Pharmaceutical Sciences, Kyoto University
Keisuke Inoue: Graduate School of Enginnering, Kyoto University
Tomohiro Numata: Graduate School of Enginnering, Kyoto University
Nobuaki Takahashi: Graduate School of Enginnering, Kyoto University
Hisashi Shirakawa: Graduate School of Pharmaceutical Sciences, Kyoto University
Yasuo Mori: Graduate School of Enginnering, Kyoto University
Takayuki Nakagawa: Graduate School of Pharmaceutical Sciences, Kyoto University
Shuji Kaneko: Graduate School of Pharmaceutical Sciences, Kyoto University

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Mammalian transient receptor potential ankyrin 1 (TRPA1) is a polymodal nociceptor that plays an important role in pain generation, but its role as a cold nociceptor is still controversial. Here, we propose that TRPA1 can sense noxious cold via transduction of reactive oxygen species (ROS) signalling. We show that inhibiting hydroxylation of a proline residue within the N-terminal ankyrin repeat of human TRPA1 by mutation or using a prolyl hydroxylase (PHD) inhibitor potentiates the cold sensitivity of TRPA1 in the presence of hydrogen peroxide. Inhibiting PHD in mice triggers mouse TRPA1 sensitization sufficiently to sense cold-evoked ROS, which causes cold hypersensitivity. Furthermore, this phenomenon underlies the acute cold hypersensitivity induced by the chemotherapeutic agent oxaliplatin or its metabolite oxalate. Thus, our findings provide evidence that blocking prolyl hydroxylation reveals TRPA1 sensitization to ROS, which enables TRPA1 to convert ROS signalling into cold sensitivity.

Date: 2016
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DOI: 10.1038/ncomms12840

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