Molecular and circuit mechanisms underlying avoidance of rapid cooling stimuli in C. elegans

Chenxi Lin, Yuxin Shan, Zhongyi Wang, Hui Peng, Rong Li, Pingzhou Wang, Junyan He, Weiwei Shen, Zhengxing Wu and Min Guo ()
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Chenxi Lin: Huazhong Agricultural University
Yuxin Shan: Huazhong Agricultural University
Zhongyi Wang: Huazhong Agricultural University
Hui Peng: Huazhong Agricultural University
Rong Li: Huazhong University of Science and Technology
Pingzhou Wang: Huazhong University of Science and Technology
Junyan He: Huazhong Agricultural University
Weiwei Shen: Huazhong Agricultural University
Zhengxing Wu: Huazhong University of Science and Technology
Min Guo: Huazhong Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-18

Abstract: Abstract The mechanisms by which animals respond to rapid changes in temperature are largely unknown. Here, we found that polymodal ASH sensory neurons mediate rapid cooling-evoked avoidance behavior within the physiological temperature range in C. elegans. ASH employs multiple parallel circuits that consist of stimulatory circuits (AIZ, RIA, AVA) and disinhibitory circuits (AIB, RIM) to respond to rapid cooling. In the stimulatory circuit, AIZ, which is activated by ASH, releases glutamate to act on both GLR-3 and GLR-6 receptors in RIA neurons to promote reversal, and ASH also directly or indirectly stimulates AVA to promote reversal. In the disinhibitory circuit, AIB is stimulated by ASH through the GLR-1 receptor, releasing glutamate to act on AVR-14 to suppress RIM activity. RIM, an inter/motor neuron, inhibits rapid cooling-evoked reversal, and the loop activities thus equally stimulate reversal. Our findings elucidate the molecular and circuit mechanisms underlying the acute temperature stimuli-evoked avoidance behavior.

Date: 2024
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DOI: 10.1038/s41467-023-44638-5

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