High-fidelity encoding of mechanostimuli by tactile food-sensing neurons requires an ensemble of ion channels.
High-fidelity encoding of mechanostimuli by tactile food-sensing neurons requires an ensemble of ion channels.
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DOI:
10.1016/j.celrep.2023.112452
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发表时间:
2023-05-30
期刊:
影响因子:
8.8
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The nematode C. elegans uses mechanosensitive neurons to detect bacteria, which are food for worms. These neurons release dopamine to suppress foraging and promote dwelling. Through a screen of genes highly expressed in dopaminergic food-sensing neurons, we identify a K2P-family potassium channel—TWK-2—that damps their activity. Strikingly, loss of TWK-2 restores mechanosensation to neurons lacking the NOMPC-like channel transient receptor potential 4 (TRP-4), which was thought to be the primary mechanoreceptor for tactile food sensing. The alternate mechanoreceptor mechanism uncovered by TWK-2 mutation requires three Deg/ENaC channel subunits: ASIC-1, DEL-3, and UNC-8. Analysis of cell-physiological responses to mechanostimuli indicates that TRP and Deg/ENaC channels work together to set the range of analog encoding of stimulus intensity and to improve signal-to-noise characteristics and temporal fidelity of food-sensing neurons. We conclude that a specialized mechanosensory modality—tactile food sensing—emerges from coordination of distinct force-sensing mechanisms housed in one type of sensory neuron. The nematode C. elegans uses specialized mechanosensory neurons to detect food. Fok et al. find that these neurons require a K2P channel and Deg/ENaC channels in addition to TRP channels for high-fidelity responses to mechanostimuli and normal foodresponse behavior.
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DOI:
10.1152/physiol.00006.2012
发表时间:
2012-10
期刊:
Physiology (Bethesda, Md.)
影响因子:
--
作者:
Eastwood AL;Goodman MB
通讯作者:
Goodman MB
DOI:
10.1093/bioinformatics/btu638
发表时间:
2015-01-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Anders S;Pyl PT;Huber W
通讯作者:
Huber W
影响因子:
16.2
作者:
Christensen, M;Estevez, A;Strange, K
通讯作者:
Strange, K
DOI:
10.1111/nyas.12874
发表时间:
2015-01-01
期刊:
ANNALS REPORTS, VOL 1352
影响因子:
--
作者:
Brohawn, Stephen G.
通讯作者:
Brohawn, Stephen G.
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.