Large-scale forward genetics screening identifies Trpa1 as a chemosensor for predator odor-evoked innate fear behaviors.
Large-scale forward genetics screening identifies Trpa1 as a chemosensor for predator odor-evoked innate fear behaviors.
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DOI:
10.1038/s41467-018-04324-3
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发表时间:
2018-05-23
影响因子:
16.6
通讯作者:
Liu Q
中科院分区:
文献类型:
--
作者:
Wang Y;Cao L;Lee CY;Matsuo T;Wu K;Asher G;Tang L;Saitoh T;Russell J;Klewe-Nebenius D;Wang L;Soya S;Hasegawa E;Chérasse Y;Zhou J;Li Y;Wang T;Zhan X;Miyoshi C;Irukayama Y;Cao J;Meeks JP;Gautron L;Wang Z;Sakurai K;Funato H;Sakurai T;Yanagisawa M;Nagase H;Kobayakawa R;Kobayakawa K;Beutler B;Liu Q
Innate behaviors are genetically encoded, but their underlying molecular mechanisms remain largely unknown. Predator odor 2,4,5-trimethyl-3-thiazoline (TMT) and its potent analog 2-methyl-2-thiazoline (2MT) are believed to activate specific odorant receptors to elicit innate fear/defensive behaviors in naive mice. Here, we conduct a large-scale recessive genetics screen of ethylnitrosourea (ENU)-mutagenized mice. We find that loss of Trpa1, a pungency/irritancy receptor, diminishes TMT/2MT and snake skin-evoked innate fear/defensive responses. Accordingly, Trpa1−/− mice fail to effectively activate known fear/stress brain centers upon 2MT exposure, despite their apparent ability to smell and learn to fear 2MT. Moreover, Trpa1 acts as a chemosensor for 2MT/TMT and Trpa1-expressing trigeminal ganglion neurons contribute critically to 2MT-evoked freezing. Our results indicate that Trpa1-mediated nociception plays a crucial role in predator odor-evoked innate fear/defensive behaviors. The work establishes the first forward genetics screen to uncover the molecular mechanism of innate fear, a basic emotion and evolutionarily conserved survival mechanism. TMT is a chemical that evokes innate defensive behaviors yet the molecular mechanisms are not well understood. Here the authors perform a large-scale forward genetics screen in mice and identify Trpa1, a pungency/irritancy receptor, as a chemosensor for predator odor-evoked innate fear and defensive behaviors.
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DOI:
10.1002/ar.22745
发表时间:
2013-09-01
影响因子:
2
作者:
Fortes-Marco, Lluis;Lanuza, Enrique;Martinez-Garcia, Fernando
通讯作者:
Martinez-Garcia, Fernando
影响因子:
2.7
作者:
Ayers, Luke W.;Asok, Arun;Rosen, Jeffrey B.
通讯作者:
Rosen, Jeffrey B.
DOI:
10.1073/pnas.1214249110
发表时间:
2013-03-19
影响因子:
11.1
作者:
Brechuehl, Julien;Moine, Fabian;Broillet, Marie-Christine
通讯作者:
Broillet, Marie-Christine
影响因子:
16.2
作者:
Kwan, KY;Allchorne, AJ;Corey, DP
通讯作者:
Corey, DP
影响因子:
64.5
作者:
Gore F;Schwartz EC;Brangers BC;Aladi S;Stujenske JM;Likhtik E;Russo MJ;Gordon JA;Salzman CD;Axel R
通讯作者:
Axel R